Process for constructing impervious concrete wall by using open excavation and inverted construction method

Abstract

The invention discloses a process for constructing an impervious concrete wall by using an open excavation and inverted construction method. The process comprises the steps of constructing guide grooves and a construction platform, segmentally constructing lining walls from top to bottom and pouring an impervious wall from bottom to top. The process is adapted to the perpendicular open excavation of an ultra-long, ultra-deep and large-section impervious wall structure; compared with those of an impervious concrete wall constructed by a conventional method, groove holes constructed by an open excavation and inverted construction grooving process have the advantage that high-flow regime concrete has better compaction effects on the lining walls and soil bodies on the two sides, so that the stress relaxation conditions of the soil bodies on the two sides are changed, and changes in the permeation boundary conditions of the impervious concrete wall are small; the impervious concrete wall constructed by the open excavation and inverted construction method has tangible construction quality, and procedure and process control is ensured, so that the problems of high hole collapse rate and low grooving efficiency of the groove holes during the construction of a loose sandy gravel layer impervious concrete wall are solved, and the joint quality of the impervious concrete wall is ensured.

Description

technical field [0001] The invention belongs to the technical field of design and construction of water conservancy and hydropower construction, in particular to the construction and utilization of cut-off walls, and in particular to a construction process for the construction of concrete cut-off walls by the open excavation and reverse construction method. Background technique [0002] The anti-seepage wall is a kind of underground continuous wall. It is a kind of construction on the ground, using a special trenching machine. In the case of mud or stabilizing fluid, thixotropic mud, and stabilizing fluid to protect the wall, holes or grooves are made and then backfilled. The wall material is constructed section by section, and finally a continuous wall with a certain anti-seepage capacity is formed underground. [0003] The concrete cut-off wall is an underground continuous wall that is built by pouring concrete under the mud or backfilling other anti-seepage materials in a...

AI Technical Summary

Problems solved by technology

For example, the commonly used drilling and splitting method has the following problems: the guide wall is deformed and damaged, the groove wall is easy to collapse, easy to leak slurry, easy to cause hole inclination, and easy to stick the drill

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