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High-span section strong karst filler treatment construction method and curtain anti-seepage method

A construction method and filling technology, which are applied in basic structural engineering, construction, sheet pile walls, etc., can solve the problems of difficult processing of strong karst fillings, threatening the safety of curtain seepage construction, etc., to solve the problem of limited working space, The effect of reducing the difficulty of processing and reducing risks

Inactive Publication Date: 2021-08-03
SINOHYDRO BUREAU 11 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a construction method for treating strong karst fillings in high-span sections and a curtain anti-seepage method to solve the problem that the treatment of strong karst fillings inside existing karst caves is difficult and threatens the safety of curtain anti-seepage construction

Method used

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  • High-span section strong karst filler treatment construction method and curtain anti-seepage method
  • High-span section strong karst filler treatment construction method and curtain anti-seepage method
  • High-span section strong karst filler treatment construction method and curtain anti-seepage method

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Experimental program
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Effect test

Embodiment 1

[0042] A construction method for treating strong karst fillings in high-span sections, comprising the following steps:

[0043] S1: For the strong karst filling in the karst cave, drill high-pressure jet nozzles in the foundation treatment range of the concrete corridor. High-pressure rotary spraying treatment to form rotary spraying body 10, and curing for 28 days.

[0044] S2: Drill inspection holes in sections from top to bottom on the axis of the curtain and take core samples. The diameter of the inspection holes is ≥ 60mm, and the depth of the inspection holes is less than 2m below the adjacent high-pressure jetting holes. The hole is subjected to hydrostatic head pressure test, and the obtained core samples are subjected to 28-day and 90-day saturated compressive strength tests respectively; -7 cm / s), proceed to the next step; if the test and test fail, carry out high-pressure rotary spraying reinforcement until the test and test pass.

[0045] S3: Drill multiple insta...

Embodiment 2

[0052] A curtain anti-seepage method based on the above-mentioned construction method for treating strong karst fillings in high-span sections, adopts a conventional curtain grouting method for curtain anti-seepage, and constructs the curtain grouting hole section at the lower part of the cave through a casing. The present invention adopts the conventional and mature curtain grouting method to carry out the curtain grouting method on the karst cave containing strong karst filling, without changing the original curtain grouting scheme, reducing the difficulty of anti-seepage construction, and using the pre-buried casing to grout the curtain at the lower part of the karst cave Hole construction can speed up the construction progress, improve the grouting efficiency, and the grouting quality after grouting is high.

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Abstract

The invention discloses a high-span section strong karst filler treatment construction method and a curtain anti-seepage method, and belongs to the technical field of anti-seepage construction. According to the high-span section strong karst filler treatment construction method and the curtain anti-seepage method, a high-pressure jet grouting and steel pipe pile composite technology is adopted, a strong karst filler can be effectively reinforced, the risk of follow-up curtain anti-seepage construction is reduced, the problem that the operation space of large foundation treatment construction equipment is limited can be solved, and the treatment difficulty of the strong karst filler is reduced.

Description

technical field [0001] The invention relates to the technical field of anti-seepage construction, in particular to a construction method for treating strong karst fillings with high-span sections and a curtain anti-seepage method. Background technique [0002] In engineering practice at home and abroad, the karst caves that have been exposed on the curtain anti-seepage line of water conservancy and hydropower projects are usually treated with a series of methods such as "leading, blocking, overcoming, and winding". When encountering underground rivers or karst caves with water, diversion methods should be adopted to find out the direction of water sources and the relationship between grouting corridors, divert water sources inside the anti-seepage line to the reservoir, and divert water sources outside the anti-seepage line to the construction site . For anhydrous karst caves that have stopped growing and have a small span, according to the specific conditions of the fillin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/16E02D5/28E02D5/46E02D15/04
CPCE02D19/16E02D5/285E02D5/46E02D15/04
Inventor 吕理军潘龙龙张克阳
Owner SINOHYDRO BUREAU 11 CO LTD
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