40results about How to "Reduce traffic noise" patented technology

The invention discloses a railway noise controller which is installed on a rail, belonging to the noise control field. The noise controller comprises a restraint layer component, a damping layer, a pin roll, a mass block, a retainer pin, a dynamic vibration absorber shell, a wedge-shaped block and an elastic layer. The damping layer is installed at the waist, the flange and the bottom of the rail, and is fixed by the restraint layer component and the dynamic vibration absorber shell. The restraint layer component and the dynamic vibration absorber shell are connected through the pin roll, andthe wedge-shaped block applies clamp force on the restraint layer component and the dynamic vibration absorber shell. The dynamic vibration absorber shell with the mass block is installed at the bottom of the rail and the mass block is connected with the shell through the elastic layer. The railway noise controller effectively reduces noise of the rail in the aspect of noise source. The railway noise controller can be installed on the rail and requires no bond for adhibiting, and is low in cost and convenient to maintain. The restraint layer component, the pin roll, the mass block, the retainer pin, the dynamic vibration absorber shell and the wedge-shaped block can be used repeatedly, and the damping layer and the elastic layer are convenient to replace.

The invention discloses an active embankment top road upgrading structure and a construction method. The construction method is characterized by comprising the steps that rebars are embedded to the top of an original wave wall, and the embedded rebars are connected to form an integral formed rebar frame; a wave wall formwork of a heightened segment adopts hinged fracture surface formworks, and fixation of the formwork is achieved through shelves, symmetrical clamping plate, butt clamping threaded rods, upper symmetrical lug plates and formwork inner side supports; longitudinal joints, transverse contraction joints, transverse expansion joints and transverse construction joints are arranged on an exposed concrete pavement; the exposed concrete pavement adopts a whole face transverse formwork; a vibration strike-off beam is adopted for vibration of concrete, the vibration strike-off beam is connected with an n-shaped support through a strike-off beam hanging bracket, and the n-shaped support can walk along a support track; chutes are used for pouring the concrete; and a drainage ditch formwork adopts a separable inner formwork and hoisting formwork easily dismounting system. The construction efficiency is improved, and the construction process is simple and easy to practice. Relatively good technical and economic benefits can be achieved when the active embankment top road upgrading structure and the construction method are applied to the actual engineering.

The invention relates to a plant configuration used for urban road traffic noise reduction. Configured plants comprise evergreen tree species, deciduous tree species, evergreen shrub species, deciduous shrub species and a lawn, wherein the evergreen tree species comprise Cinnamomum camphora and Ligustrum lucidum; the deciduous tree species comprise gingko, Zelkova serrate and Prunus cerasifera; the evergreen shrub species comprise sweet-scented osmanthus and oleander; the deciduous shrub species comprise Hibiscus syriacus L, Chinese redbud, flowering peach and multiflora rose; and the lawn is a Manila lawn. The evergreen tree species, the deciduous tree species, the evergreen shrub species and the deciduous shrub species used for the plant configuration are called by a nursery stock and respectively come from a nursery garden. The plant configuration used for the urban road traffic noise reduction has the advantages that the environment is beautified; the service life is long; the operability is strong; the landscape property is good; the ecological value is high; the cost is low; planting and maintenance are easy; the noise reduction effect is good; and the noise reduction function is efficient. Better noise reduction can also be performed on zones of which road green belts are not sufficient or stained in width because of the limitations of geographic locations or the ambient environments, and a very good action is performed in creating an urban favorable living environment.

The invention relates to a large sound barrier suitable to a major trunk road in a city, which comprises a road-side road-bed section barrier, a road-side bridge-bed section barrier, an in-road road-bed section barrier and an in-road bridge-bed section barrier. The large sound barrier is characterized in that the two barriers of road-side and in-road are arranged for reducing noise based on the characteristics of wide road, large traffic flow and high noise value in the major trunk road in the city, the height of the road-side road-bed section barrier is not more than 6.5m, the height of the road-side bridge-bed section barrier is not less than 5.35m, the height of the in-road barriers is not less than 4.35m, and extending lengths of two ends of the barriers exceed sensitive spots by 70m respectively; foundations of the road-bed section barriers adopt a combination structural mode of U-shaped piles, bearing platforms, upright posts and connecting walls; foundations of the bridge-bed section barriers adopt a structural mode that U-shaped pieces and opposed bolt plant gum are fixed on anti-collision piers; materials of the barrier consist of perlite, foamed aluminum plates or aluminum fiber boards, and microperforated plates; structures of the barriers adopt a mode of straight screens and top sound absorbing cylinders, and adopt a combination mode of sound absorbing screens withsingle-faced foamed aluminum plates, double-faced foamed aluminum plates, or single-faced aluminum fiber boards and double-faced aluminum fiber boards according to the demands of noise source and surrounding road conditions.