76results about How to "Improve flood protection" patented technology

The invention discloses a mountain area river ecological runoff calculating and application method, and solves the problems that mountain area small and medium river annual rainfall distribution is not even, water inflow in a dry season is insufficient, and limited ecological runoff cannot satisfy wide and shallow riverbed full coverage and current continuity; the method comprises the following steps: using a Tennant method to calculate the minimum ecological runoff volume that satisfies the riverbed ecology system basic demands, wherein the minimum ecology flow cannot cover the whole riverbed and form certain depth in a non-flood season; using the minimum ecology flow as the design flow, and using a manning formula to calculate to-be-drilled width and depth of the main channel riverbed; drilling down the riverbed in the main channel of the riverbed according to the calculated width and depth. Engineering measures can narrow and deepen the riverbed, so limited ecological runoff can flow along the riverbed center in the non-flood season, thus preventing riverbed cutoff, ensuring river water body continuity, ensuring riverbed ecology flow, and satisfying mountain area river aquatic biology survival and multiplying basic demands.

The invention provides a hinged movable dam and a power unit thereof. The power unit of the hinged movable dam comprises a tappet rod, a hydraulic cylinder, a guide groove structure and a bottom shaft base, wherein the guide groove structure comprises a groove body and a pair of parallel guiding grooves formed in the groove body; one end of the tappet rod is connected with one end of the hydraulic cylinder through a sliding bearing, and the other end of the tappet rod is connected with the bottom shaft base through a hinge; the back of the groove body is fixedly arranged on a gate body of the hinged movable dam, and the bottom shaft base is connected with a foundation connecting plate of a hinge dam; the hydraulic cylinder is used for pushing the sliding bearing to slide upwards or downwards along the guiding grooves, and thus, the tappet rod can swing around the hinge so as to drive the gate body of the hinged movable dam to rise or fall. According to the hinged movable dam and the power unit thereof, the power unit of the hinged movable dam has relatively strong stability, and the gate body can effectively resist water pressure under the supporting of the structure, so that the defect of no-instruction dam dropping of hinged movable dams in the prior art is overcome, and the flood control function of the hinged movable dam can be effectively improved.

The present invention discloses a reservoir group flood control capacity distribution method based on a maximal variable-weight remaining flood control capacity. According to the technical scheme of the invention, serial cascade reservoirs are adopted as equivalent reservoirs and the parameters of the equivalent reservoirs are determined. The weight of the remaining flood control capacity of each reservoir in a serial cascade reservoir group is calculated. According to the weight of the remaining flood control capacity of the serial cascade reservoirs, the weight of the remaining flood control capacity of each reservoir of all equivalent reservoirs is calculated. After that, a reservoir group flood control capacity optimization distribution model based on a maximal variable-weight remaining flood control capacity is established. The model is solved and a flood control capacity optimization distribution scheme is obtained. According to the technical scheme of the invention, the influence of flood characteristics on the reservoir group flood control capacity optimization distribution is fully considered. According to the reservoir inflow, the flood control capacity and the flood routing process, the weight of the remaining flood control capacity of each reservoir is determined, wherein the weight is varying along with different scheduling periods. The influence of subjective factors during the weight setting process of the conventional method can be avoided. The distribution scheme of the reservoir group flood control capacity is optimized and the overall effect of improving the flood control effect in a reservoir drainage basin is realized. The flood control risk of the reservoir is effectively reduced.

The invention discloses a method for hydraulic tailing flushing and filling damming through mold bag boundaries. The method comprises the steps that a weak foundation on a tailing beach is reinforced firstly, and the subgrade bearing capacity of loaded sub-dams is improved; the sub-dams are built by stages by adopting tailing-filled mold bags as the boundaries of the sub-dams, specifically, the stacking height each stage is 10-15 m; dam bodies of the middle portion formed by stacking the mold bag sub-dams are built in a filled mode through a hydraulic flushing and filling method, and the top width of the dam bodies is larger than the required minimum dry beach length of a tailing pond; and flow areas on the tops of the dam bodies formed through hydraulic flushing and filling are reinforced, after the sufficient bearing capacity is achieved, the mold bag sub-dams are adopted for capping, and then damming is completed. According to the method, the requirement for intensity of filling operation for the mold bags is low, the thickness of traditional mold bag sub-dams can be significantly increased, meanwhile, the dry beach length of the tailing pond is increased, and the flood prevention capacity and stability of the tailing pond are improved.

A flood barrier includes glass panels (5) held within a metal frame that includes hollow vertical posts (1) having caps (3) designed for removal so that spigots (20) can be fitted in the posts (1) to allow upward extensions (19) to be connected to the metal frame.

The invention relates to a double-layer flood protection wall using an inflating airbag as a power to automatically lift a turnover plate, belonging to the technical field of hydraulic engineering. The double-layer flood protection wall is mainly formed by connecting the inflating airbag (1), a steel plate (3) of the turnover plate, a connection rotating shaft (7), an automatic inflating device (8), a flexible pull rope (5), a reinforced concrete base wall body (9), a water stopping device (10), a water stopping device (18) and serial buckles among the plates, wherein the lifting of an upper plate is controlled by buoyancy force provided by the air inflation or deflation of the airbag. The invention has the advantages that the double-layer flood protection wall is capable of resisting against the flood at different levels, has light and thin plate, can automatically lift, is convenient to use and has a certain economic benefit, so that the double-layer flood protection wall can be widely applied to the flood prevention project of cities and important buildings.

The invention discloses a flood bank for a water conservancy project. A supporting frame I, a supporting frame II, a supporting frame III and a supporting frame IV are located at the four corners of aflood control wall correspondingly, sliding grooves I are formed in one side of the upper end of the supporting frame I and one side of the upper end of the supporting frame II, sliding grooves II are formed in one side of the upper end of the supporting frame III and one side of the upper end of the supporting frame IV, two sets of rollers I matched with the sliding grooves I are arranged on theside, close to the sliding grooves I, of a movable frame, and two sets of rollers II matched with the sliding grooves II are arranged on the side, close to the sliding grooves II, of the movable frame; the lower ends of the supporting frame I, the supporting frame II, the supporting frame III and the supporting frame IV are fixedly connected with the flood control wall in a welded mode; and the movable frame is connected with the rollers I and the rollers II through supporting rods. An adjusting device capable of sliding up and down obliquely is arranged on the flood control wall of the floodbank, so that when flood comes, the height of the flood bank can be increased again within a very short time, the height of the flood bank is increased by nearly one time, and the flood control effect of the flood bank is greatly improved.

The invention discloses a flood storage waterlogging prevention device capable of increasing the urban river channel water storage. The flood storage waterlogging prevention device is located on a river channel revetment which comprises multiple sections of hollow structure. Each section of hollow structure is a section of water storage body. Each water storage body is divided into a plurality of water storage box bodies through partition wall structures in the direction of the river shoreline. Every two adjacent water storage box bodies are communicated through a communicating door hole. A water inlet is formed in the upper portion of the side, close to a river, of each water storage box body. The bottommost end of each water inlet is lower than the highest water level of a river channel. A plurality of check valves are arranged at the bottom of the side, close to the river, of each water storage box body. The check valves and the lowest water level of the river channel are located on the same horizontal line. The top faces of bottom plates of the water storage box bodies are lower than the lowest water level of the water channel. By means of the flood storage waterlogging prevention device, the flood storage capacity of the river channel is effectively increased, the runoff and the peak value of storms are decreased and delayed, and therefore the flood control capacity of the river channel is improved. The flood storage waterlogging prevention device is simple, practical, safe, reliable, capable of saving investment, free of power, free of manual operation and capable of automatically storing water and emptying in a circulating mode.

The invention discloses a geotextile bag dam reinforcing method. Geotextile bags are adopted to reinforce the downstream side of a dam along a river, the dam top is widened under the condition that noland is occupied, a pavement is paved on the widened dam top to serve as a riverside landscape road, the method has the principle that the anti-sliding and anti-seepage stability and the vertical bearing capacity of the dam are improved through the interlayer friction and embedding and fixing effects of the geotextile bags, the water filtration and soil conservation effects of the geotextile bagsand the additional cohesive force provided by the geotextile bags to internal soil. Therefore the method not only can improve the stability of the dam under the condition of not occupying the land, but also increases the application of the dam as a riverside road. The filling material in the geotextile bags can adopt on-site excavated spoil or nearby urban muck and the like, so that waste is changed into treasure, and the waste becomes a renewable resource.

The invention discloses a three-dimensional comprehensive afforestation system of an ecological factory. The three-dimensional comprehensive afforestation system comprises vegetation boxes, water storage tanks, supporting plates, engaging plates, rib plates, water inlet pipes, change-over pipes and connectors, wherein the supporting plates are arranged on the outer surface, vertical to a wall body, of a building; the plurality of layers of supporting plates are arranged; the rib plates are arranged below the supporting plates; one end of each rib plate is connected with the corresponding supporting plate and the other ends of the rib plates are connected with the wall body; the vegetation boxes are arranged on the supporting plates; the vegetation boxes are fitted with the wall body; each vegetation box is internally provided with a plant culture medium; the water storage tanks is arranged at openings of the vegetation boxes; the engaging plates are vertically arranged; the upper ends of the engaging plates are connected with the bottom surfaces of the supporting plates and the lower ends of the engaging plates are connected with the vegetation boxes on a lower layer; and the lower end of the engaging plate at the bottommost part is connected with the ground. According to the three-dimensional comprehensive afforestation system, the water inlet pipes are arranged and a water supply pipeline or a roof water drainage pipe is connected; rainwater is stored in the afforestation system, so that pressure of an urban water drainage system is alleviated; and meanwhile, the rainwater is recycled and the effect of a sponge city is realized.

The invention relates to a method for power generation by developing and utilizing the dead water quantity of a water reservoir, which comprises the following steps: (1) from an Nth level of water reservoir to a 2nd level of water reservoir in a drainage area, selecting at least one water reservoir between a designed dead water level and a designed silting water level, arranging at least one waterpassage which leads the dead water quantity of the water reservoir to a downstream water reservoir; (2) arranging a working strobe and a repair strobe which are opened and closed independently in each water passage respectively, or a common repair strobe; and (3) utilizing the dead water quantity from an upstream water reservoir to carry out power generation by a hydroelectric power station whichis matched with the downstream water reservoir. The water reservoirs at all levels also can be provided with the corresponding hydroelectric power stations, and the dead water quantity in the water reservoir at this level is utilized to carry out power generation. The dead water quantity of the water reservoir is developed and utilized to carry out the power generation, which not only can increase the power generation capacity and obtain cheap electric energy but also is beneficial to flood prevention and disaster reduction.

The invention relates to a method of calculating ponding depths of a site of a coastal nuclear power plant. The method comprises the following steps of (I) establishing a surface runoff model capable of representing the relation between a surface water depth and drainage quantity of a rainwater pipe network according to the rainfall condition of the site of the nuclear power plant, overtopping of seawater at the periphery, a surface slope and the site surface solidification condition; (II) as for a drainage process of the rainwater pipe network, considering the jacking effect of overtopping of the seawater at the periphery on rainwater and establishing hydrodynamic model of the rainwater pipe network; (III) dividing computational grids of the site, through causing the drainage quantity of the rainwater pipe network to be equal to the displacement of the rainwater in a pipe network system, realizing coupling calculation of the surface runoff model and the hydrodynamic model of the pipe network, and determining the ponding depths of different areas of the site. According to the method, through combinatorial computing of the influence caused by rainfall of the site and overtopping of the seawater at the periphery of the site, the obtain values of the ponding depths are more scientific and reasonable, so that a flood control plan and a flood control measure are pointedly proposed for important buildings of the nuclear power plant, thus the flood control capacity of the site is improved.

The invention discloses a compound river channel system. The system comprises a main river channel, revetments disposed on both sides of the main river channel and at least one twisty and different-depth ecological river channel in the water flow direction built in the main river channel. The ecological river channel meets the conditions that in the flat water period and the dry water period, theflow rate of the river main stream is greater than or equal to 0.5 m / s. The compound river channel system has a great improvement on water quality, and can upgrade the main nutrient salt indexes of the water quality, such as ammonia nitrogen, total nitrogen, total phosphorus and the like, from inferior V to near class IV and above; the river channel can store water in the flat water period and thedry water period and conduct flood discharge during the rainy season to enhance the flood control capacity of the river.

The invention discloses a pedestrian and vehicle separation double-path ecofallow commercial gallery bridge, which comprises bridge piers and a bridge panel beam, wherein the bridge panel beam is arranged on the bridge piers, a pedestrian path and a motorway which are also used as fire fighting accesses are parallelly arranged on the upper surface of the bridge panel beam in the longitudinal direction, commercial regions are arranged at the two sides of the pedestrian path, greening leisure regions are arranged every 5 to 10 meters in the longitudinal direction of the pedestrian path, and pollution discharge pipelines are respectively arranged under the middle part and at the two sides of the bridge panel beam. The pedestrian and vehicle separation double-path ecofallow commercial gallery bridge has the advantages that the bridge form can be sufficiently applicable to each wide and shallow river, the vehicle passing requirements are sufficiently guaranteed, the pedestrian group passing safety and convenience requirements are also sufficiently guaranteed, meanwhile, the fire fighting and pollution discharge requirements of the commercial operation range are also guaranteed, and the leisure viewing requirements of the pedestrians can be met.

The invention discloses a method and a system for analyzing a flood process encountering time and magnitude occurrence rule, and belongs to the field of hydrological analysis and calculation in hydrology. At present, the research on flood encountering is mainly to count the occurrence frequency of historical flood encountering or calculate the probability of exceeding a certain magnitude of flood,and has limitations in the aspect of comprehensively analyzing the occurrence time and magnitude law of flood encountering. The time sequence encountering rule of the multi-river flood reaching the converging port and the most possible magnitude combination research under a certain risk in the flood process are not involved. According to the method, various situations that upstream and downstreamflood and main and branch flood reach the confluence section when flood encounters are explored, the conditional probability of flood encountering under different situations is analyzed, and the mostpossible flood magnitude combination form under the specified risk probability is further disclosed; the understanding limitation of single risk probability calculation in the flood process is overcome, and a scientific basis and effective support are provided for improving the flood control capacity of the drainage basin and guaranteeing the safety of flood control objects.

The invention discloses an intelligent buoyancy type flood control and water retaining device for a ventilation pavilion and a control method. The device comprises a water retaining plate, a shell, a buoyancy assembly, an on-site monitoring system and an electrical control unit. The overall structure of the water baffle is matched with the shape of the ventilation pavilion, and the water baffle is formed by splicing a plurality of water baffles. The shell accommodates the buoyancy assembly and the water baffle, a water inlet hole is formed in the bottom, an extending opening is formed in the top, and a sealing tape is arranged between the extending opening and the baffle. The buoyancy assembly comprises a buoyancy device and a guide device. The buoyancy device drives the water baffle to float upwards. The guiding device is used for guiding the buoyancy device. The on-site monitoring system collects water level information and water baffle state information at the corresponding position of a position sensor in real time through a water level gauge and the position sensor, and transmits the information to the electrical control unit. Compared with preset parameters, judging and displaying are performed. The flood prevention capacity of the ventilation pavilion in rainstorm is improved, the station is prevented from being flooded, and subway operation safety is ensured. The automation degree of monitoring is improved, the speed is high, and the efficiency is high.

The invention discloses an outdoor sealed flood prevention 5G communication cabinet, which comprises an outer cabinet body and a cabinet element arranged on the inner side of the outer cabinet body, wherein the inner side of the outer cabinet body is fixedly connected with an inner cabinet body, a gap is formed between the inner cabinet body and the outer cabinet body, an outer sealing door is installed on the outer end face of the outer cabinet body, an inner sealing door is installed on the outer end face of the inner cabinet body, a liquid level sensor is installed on the outer end face ofthe outer cabinet body, and a rain cover is installed on the outer side, close to the liquid level sensor, of the outer end face of the outer cabinet body. In the present invention, a flood self-floating structure is adopted, so that the flood prevention performance of the communication cabinet is improved; sealed metal conduction type cooling is adopted, and heat exchange is carried out between the inner wall of the inner cabinet body and air in the inner cabinet body, so that heat dissipation is carried out on the inner side of the inner cabinet body, and the heat dissipation effect of the communication cabinet is improved; and finally a full-sealed waterproof cooling structure is adopted, so that the safety of the communication cabinet is improved.

The invention provides an intelligent lifting type flood control water retaining device for a fan pavilion and a control method. The device comprises a baffle assembly, a shell, a lifting assembly, a field monitoring system and an electrical control unit, wherein the baffle assembly is matched with the fan pavilion in shape; a sealing rubber strip is arranged on the periphery of the bottom of a baffle; the shell contains the lifting assembly and the baffle assembly and covers a foundation of a fan pavilion opening; a lifting opening is formed in the top of the shell; the sealing rubber strip seals the lifting opening when the baffle ascends; the lifting assembly comprises a linkage lifting mechanism and a motor; the field monitoring system comprises a water level gauge and a position sensor and collects information; and the electrical control unit receives the information and drives the linkage lifting mechanism to ascend and descend by controlling the motor to rotate forwards and backwards, and the baffle is made to stretch out and retract. The lifting mechanism is automatically controlled to drive the baffle to ascend and descend, the flood control capacity of the fan pavilion during rainstorm is improved, a station is prevented from being flooded, and the operation safety of a subway is ensured; and the automation degree is improved, the speed is high, and efficiency is high.

The invention discloses a safety protection type flood control water retaining wall based on water stop strip supporting. The safety protection type flood control water retaining wall comprises a water retaining side frame, wherein a stable supporting plate is fixedly connected to the position, close to the lower portion, of the back face of the water retaining side frame; an anti-impact baffle isarranged in the middle of the interior of the water retaining side frame; mounting rails are fixedly connected to the two sides of the back face of the water retaining side frame; auxiliary sliding blocks are in sliding connection with the interiors of the mounting rails; the exteriors of transmission thread inserting blocks are in sliding connection with the interiors of adjusting rails; the tops of the transmission thread inserting blocks are fixedly connected with extending protection plates; and sandbag limiting stacking mechanisms are in sliding connection with the interiors of first limiting grooves and second limiting grooves. The invention relates to the technical field of flood control. According to the safety protection type flood control water retaining wall based on water stopstrip supporting, buffering of flood impact force is achieved, the force of front face impact of the water retaining wall is reduced, and the matching stability between the flood control wall and sandbags is improved.

The invention discloses an urban inland river dike ecological landscape protection system and a construction method, and belongs to the field of dike protection. The problem that an existing urban inland river landscape dam cannot achieve firmness and durability and meanwhile has good ecological ornamental value is solved. The urban inland river dike ecological landscape protection system comprises an original earth dam, a dike protection layer, an ecological landscape layer, reinforcing feet, a plurality of anti-corrosion fixing anchor drill rods, emergent aquatic vegetation and landscape vegetation. The reinforcing foot is arranged at the upstream side slope bottom of the original earth dam; the dam protection layer abuts against the side, away from the earth surface, of the original earth dam. The ecological landscape layer abuts against the side, away from the original earth dam, of the dam protection layer. A plurality of anti-corrosion fixing anchor rods sequentially penetrate through the ecological landscape layer, the dam protection layer and the original earth dam; the construction method comprises the steps of 1, building the reinforcing feet, laying the dam protection layer, 2, fixing the ecological alloy grid, 3, filling the vegetation soil and 4, planting the vegetation. The construction method is used for construction of the urban inland river dike ecological landscape protection system.

The invention belongs to the technical field of infrastructure construction of municipal administration, gardens, water conservancy, navigation channels and the like, and particularly relates to a novel green design method for solving the problems of bridge clearance deficiency and an oversteepened approach road longitudinal slope. More specifically, the problems of bridge clearance deficiency and the oversteepened approach road longitudinal slope are solved by adopting a method for separating a navigation channel from a water channel. According to the main design contents, a new river channel serves as the navigation channel; a reserved original river channel serves as the water channel; a water channel bridge is designed on the reserved original river channel; a navigation channel bridge is designed on the new river channel; an integral or separated river island is formed between the new navigation channel and the reserved original river channel; and the river island is subjected to green landscape design. The method has the characteristics of simple design, convenient construction, low post-maintenance expense, high traffic efficiency, environmental protection and the like. The invention provides a set of advanced, efficient, economic, practical and environmentally-friendly novel green design method for solving the problems of bridge clearance deficiency and the oversteepened approach road longitudinal slope, and the method has great economic and social effects and wide development and application prospects.

The invention relates to the technical field of dams, in particular to a landscape hinge movable dam. The landscape hinge movable dam comprises a dam body, a base, pull rods, supporting pieces, hydraulic cylinders and locking structures. The dam body is rotationally connected to the base around a first rotation shaft. Each supporting piece is rotationally connected to the base around a second rotation shaft. One end of each hydraulic cylinder is rotationally connected to the base around a third rotation shaft. One end of each pull rod is rotationally connected to the corresponding supporting piece through a fourth rotation shaft, and the other end of each pull rod is rotationally connected to the dam body around a fifth rotation shaft. The other end of each hydraulic cylinder is rotationally connected to the corresponding pull rod around a sixth rotation shaft. One end of each locking structure is rotationally connected to the corresponding supporting piece through a seventh rotation shaft, and the other end of each locking structure is provided with a locking groove. Each supporting piece is provided with a track. Each hydraulic cylinder is provided with a sliding block. The sliding blocks can move along the corresponding tracks and can move into the corresponding locking grooves. According to the landscape hinge movable dam, the overall stability and the flood prevention ability of the movable dam are improved; and damage of the hydraulic cylinders due to dam locking water blockage can be prevented.

The invention provides a high-water-level disaster-caused control method for sedimentation sections at the confluence of main-tributary streams by regulating sediment with marginal bank erratic boulders under high-intensity sediment from tributary streams. The high-water-level disaster-caused control method includes the steps of (1) selecting a main stream at the confluence of main-tributary streams requiring sediment regulation by the marginal bank erratic boulders as a target reach, wherein the target reach is a steep-gentle connection reach, a gully bed slope of an upper reach of the steep-gentle connection reach is greater than that of a lower reach, and a gully bed slope of a tributary stream at the confluence of main-tributary streams is greater than that of the upper reach of the steep-gentle connection reach; (2) surveying a position of a sediment accumulation body of the target reach at the confluence of main-tributary streams; (3) subjecting the erratic boulders to staggeredarrangement on a left marginal bank and a right marginal bank of the upper reach of the target reach, wherein the erratic boulders at the highest reach are positioned at the confluence of main-tributary streams and the upper reach of the sediment accumulation body at the confluence of main-tributary streams of the target reach. The high-water-level disaster-caused control method can improve the flood carrying capacity of the sedimentation sections at the confluence of main-tributary streams of mountain rivers under the high-intensity sediment from tributary streams.

The invention discloses a water conservancy flood prevention plate. The water conservancy flood prevention plate comprises a fixed base, wherein the top of the fixed base is fixedly connected with a flood prevention plate body; a buffer groove is formed in one side of the flood prevention plate body; a buffer hole is formed in the bottom of the inner wall of the buffer groove; the two sides of theend, far away from the buffer hole, of the inner wall of the buffer groove are fixedly connected with supporting plates; the two ends of the side, close to the buffer hole, of each supporting plate are fixedly connected with buffer springs; the center of the side, close to the buffer hole, of each supporting plate is fixedly connected with a telescopic rod; the ends, far away from the supportingplates, of the buffer springs are fixedly connected with buffer plates; the ends, far away from the supporting plates, of the telescopic rods are fixedly connected with the buffer plates; and the bottom of the inner wall of the buffer hole is fixedly connected with a buffer sealing device. The invention relates to the technical field of water conservancy projects. The water conservancy flood prevention plate can effectively reduce the impact force of water flow, and is good in buffer effect, high in flood resistance, not prone to toppling, large in water retaining capacity and convenient to carry.

The present invention belongs to the ecological technology field, and relates to a riparian zone ecological remediation measure suitability assessment method. The method comprises: status assessment of a riparian zone to be remedied, construction and systemization classification of an ecological remediation measure library, division of a riparian zone type regions and primary election of remediation measures, determination the dominant function of the riparian zone and optimization of the primary election measures, and obtainment of a final suitability remediation measure in the view of site conditions of the riparian zone. The method provided by the invention can consider development of other functions of a riparian zone while ensuring the development of the dominant function of the riparian zone; and a suitable riparian zone ecological remediation measure euphemistically saves the economic cost. The suitable riparian zone ecological remediation measure avoids the problem that empirical remediation measures are not suitable for the riparian zone functions and the site conditions to cause that the tree species cannot grow or loss of effect of the tree species is generated within a short time; and moreover, the suitable riparian zone ecological remediation measure can improve the flood prevention and slope stabilization and dam reinforcement capability, reduce side slope water and soil loss, improve soil, improve water quality and provide habitats for animals and plants.

The invention discloses a method for creating an arch dyke line of a river confluence area. A conventional river confluence model is established and the lengths L, the widths b and the water depths h of a flow separation zone of the river confluence area are calculated under different confluence rates RQ through Fluent numerical simulation software, curve fitting is conducted, the relation between the lengths, the widths and the depths of the flow separation zone and the confluence rates RQ is created, testing arch dyke line river confluence models under the different confluence rates RQ are established, the water depths h' of the testing arch dyke line river confluence areas corresponding to the different confluence rates RQ are calculated, the relation between the water depth reduction rates (h'-h) / h and the confluence rates RQ is created, and according to the relation between the water depth reduction rates (h'-h) / h and the confluence rates RQ, the relation between L / Bm and the RQ and the relation between b / Bm and the RQ, the confluence rate enabling the water depth reduction rate to meet the actual engineering requirement and enabling the construction project amount to be minimum is selected to calculate the 1 / 4 ellipse arch dyke line satisfying the elliptic equation shown in the specification. The arch dyke line can be applied to the river confluence area with the confluence angle between the main river and the branch river being 90 degrees.

The invention relates to a panel-free reinforced soil ecological slope protection system and a construction method thereof. According to the scheme, the panel-free reinforced soil ecological slope protection system comprises a slope main body, a concrete fixing structure arranged at the bottom of the slope main body, a slope toe drainage ditch arranged at the slope toe of the slope main body and a rapid shaping device used for carrying and shaping vegetation bags; the slope main body at least comprises a plurality of steps formed by reversely wrapping the vegetation bags with a plurality of geogrids, a temporary formwork arranged on the slope surface of the slope main body and a gravel drainage layer arranged at the bottom of the slope main body; and the vegetation bags are arranged on the vertical faces of the steps. The construction method comprises the steps that construction preparation is conducted; a steel pipe pile is constructed; a fixed frame is installed; a concrete foundation is poured; the temporary formwork is erected; the geogrids are constructed; and the vegetation bags are constructed. The panel-free reinforced soil ecological slope protection system and the construction method thereof have the advantages that the bearing capacity is high, the construction efficiency is high, the construction period is short, part of parts can be repeatedly used, and the construction cost is reduced.

The invention discloses an arch-shaped thin-wall structure retaining dam capable of being quickly constructed and an application method of the arch-shaped thin-wall structure retaining dam. The structure of the arched thin-wall water retaining dam is composed of a water retaining dam plate, supporting columns, pull rods, ground anchors, a basic water stop and a water stop connecting structural part. The water retaining dam plate is a rectangular hard thin plate, the vertical section of the dam plate is arched, the upper edge and the lower edge of the dam plate are respectively provided with anoutward folded edge, the lower edge of the dam plate is arranged on the foundation water stop, and the upper edge of the dam plate is fixedly connected with the upper ends of the supporting columns;the supporting columns are rigid structural columns, the top ends of the supporting columns are connected with the upper end of the dam plate through a connecting structure, and the lower end of the supporting columns are fixed on the foundation through hinged supports; the ground anchors are fixed on the foundation of the backwater side of the water retaining dam plate, a bolt penetrates throughan opening in the lower end of the water retaining dam plate and is connected with a bolt pressing plate, and the bottom of the water retaining dam plate is fixed on the ground anchors; and the waterretaining dam plate is connected with each other through a water stop connecting structural member. The construction method has the beneficial effects that the retaining dam can be rapidly constructedand formed, the flood prevention capacity of the dam is improved, flood raviness is prevented, the construction speed is high, the water retaining effect is good, excessive manpower and material resource input is not needed, earthwork is not needed completely, and the construction method is ecological, environmentally friendly, safe and reliable.