Construction method for milling cement soil stirring wall waterproof curtain through double wheels

Abstract

The invention discloses a construction method for milling a cement soil stirring wall waterproof curtain through double wheels. The construction method is characterized by comprising the following steps that firstly, surveying and setting out are conducted for positioning; secondly, a trench is excavated; thirdly, a double-wheel pile milling machine is arranged in place, a positioning red line is pulled to the construction side of the excavated trench, a framing point is set according to a surveying and setting-out result and marked, and the double-wheel pile milling machine is arranged in place; fourthly, at each frame of station, the double-wheel pile milling machine is used, a cutter head conducts cutting and digging and sinks to the target depth, meanwhile, cement grout is injected in a jetting manner, and the cement grout is injected in the jetting manner and stirred while the cutter head is elevated; and fifthly, after one frame of wall is constructed, the double-wheel pile milling machine is moved to the next position, the fourth step is repeated, and the next frame of wall is constructed till construction of the waterproof curtain is finished. According to the construction method, connectors are few, the water leakage risk caused by construction of cold joints can be completely avoided, and the construction efficiency is high. In the construction process, vibration is avoided, and safety performance is good. Replacement soil is little, environment friendliness is achieved, and outward transporting of slurry is reduced.

Description

technical field [0001] The invention relates to a water-stop curtain, in particular to a construction method of a water-stop curtain for a cement-soil mixing wall, and belongs to the technical field of geotechnical engineering design and construction. Background technique [0002] In the coastal and southern regions where the groundwater level is relatively high, the water-stop curtain construction of the foundation pit protection project is an important part of the foundation pit project, and its form and construction machinery are also constantly developing. At present, the typical construction method with water-stop effect is the three-axis mixing pile. The three-axis stirring pile uses a three-axis stirring drilling tool to rotate in the vertical direction and inject grout to form a cylindrical improved pile body. The adjacent pile bodies are overlapped and overlapped to form a water-stop curtain. [0003] The construction of the three-axis mixing pile requires a 1.5m-w...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a construction method of double-wheel milling cement-soil mixing wall water-stop curtain to solve the problems of unstable pile quality and poor anti-seepage effect of three-axis mixing piles in the prior art

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