Karst grouting reinforcement water-stop constructing method
A technology of grouting reinforcement and construction method, which is used in earth-moving drilling, wellbore lining, tunnel lining, etc., can solve the problems of unstable quality of reinforcement, low economic benefit, and no complementary and complete grouting reinforcement system.
Active Publication Date: 2011-08-17
GUANGZHOU URBAN PLANNING & DESIGN SURVEY RES INST
View PDF4 Cites 39 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] 1. The pertinence is not strong: For example, in southern China, karst caves have a huge development scale, different filling conditions, high groundwater level, and good connectivity. For unfilled or semi-filled karst caves, the sleeve valve is used to inject cement slurry, just like in a pond or The cement slurry is injected into the river, the filling and reinforcement effect is poor, or even invalid
[0005] 2. Large amount of grouting, poor economy: unfilled karst caves have good circulation. When injecting cement slurry or double-fluid slurry, because the groundwater is in a flowing state, the slurry is lost or diluted seriously, and the amount of grouting is large, which is economical. Very low benefit
[0006]3. Large amount of engineering and long construction period: the grouting holes are mostly densely distributed at equal intervals, and the spacing is generally 1.5~2.0m. When grouting, there is blindness Therefore, the amount of grouting is uncontrollable, the cost is high, and the construction period is long. The amount of grouting in a single hole in Guangzhou has reached more than 1,400 cubic meters. The total project cost budget is more than 30 million yuan, and the completion price is as high as 120 million yuan.
[0007]4. The effect of filling and reinforcement is not satisfactory, and there are blind spots: the single-tube or double-tube high-pressure rotary spraying method is used for reinforcement, the reinforcement range is limited, the quality of the reinforcement is unstable, or there are Grouting reinforces the blind area and becomes a channel for groundwater runoff
[0008]5. The grouting reinforcement method is single, and no complementary and complete grouting reinforcement system has been formed
[0009]6. For the southern region with high groundwater level and large water volume, karst water spray may be caused after excavation of foundation pit. If riprap sand filling method is used, it will not be successful , it can only be implemented after the water is stopped
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0035] The present invention will be further described in detail below in combination with specific embodiments.
[0036] The construction method of karst grouting reinforcement and water stop is as follows: for a certain area, according to the size of the cave, the construction is carried out according to the principle of first large and then small; Construction is carried out on the principle of first down and then up;
[0037] The construction process based on the above construction principles is as follows:
[0038] (1) According to the scale of the cave, the nature of the filling material, the filling situation and the connectivity, determine the hole position for pouring different grout.
[0039] (2) Use a core drilling machine to form a grouting hole. When necessary, use steel casing to protect the hole. For the bedrock section, the full-length core should be taken and recorded, and the height of the cave, the filling situation, the nature of the filling, and the retu...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a karst grouting reinforcement water-stop constructing method, which is to construct according to sizes of karst caves by adopting a principle of from big to small regarding a certain area, construct by adopting a principle of from outside to inside for the karst caves with the same size, and construct by adopting a principle of from the bottom to the top in a vertical direction. On the basis of the construction principles, the method comprises the following steps of: (1) forming grouting holes by adopting a core drill; (2) forming construction exhaust and drainage pressure relief holes; (3) inserting grouting pipes into the grouting holes, wherein the grouting pipes comprise steel pipes, grouting shock pipes and sleeve valve pipes; (4) cleaning the holes, wherein when the step (3) is completed, the grouting pipes are cleaned with clean water; (5) grouting; and (6) drawing out the grouting pipes after the grouting is completed, and blocking the grouting holes with cement mortar or concrete. By adopting the constructing method, the pertinence to karst caves is strong, the grouting quantity is small, the engineering work amount is small, the cost is low, and the effect of filling and reinforcing is good.
Description
technical field [0001] The invention relates to a method for strengthening and stopping water by karst grouting. Background technique [0002] At present, in covered karst areas, the existing karst grouting reinforcement technologies at home and abroad mainly use sleeve valve pipe grouting method, high-pressure rotary spraying method or riprap sand filling method. For open caves such as karst caves that have been excavated and are visible to the naked eye, riprap is used to fill them with sand or backfill them with plain concrete. For complex karst caves and karst cavities systems below the surface, the holes are arranged at equal intervals throughout the site and treated with sleeve valve pipe grouting. The grouting pressure is 0.3~3.0MPa. The grouting material is mainly cement slurry, followed by cement slurry and water. Glass combined double slurry. For some fully-filled karst caves that have been identified, single-pipe or double-pipe high-pressure rotary spraying meth...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): E21D11/10E21D11/38C04B28/00C04B28/26
Inventor 彭卫平张庆华肖淑君
Owner GUANGZHOU URBAN PLANNING & DESIGN SURVEY RES INST
Features
- R&D
- Intellectual Property
- Life Sciences
- Materials
- Tech Scout
Why Patsnap Eureka
- Unparalleled Data Quality
- Higher Quality Content
- 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com