Method of Excavating Diaphragm Wall into Groove

Abstract

The invention discloses a method for excavating an underground diaphragm wall to form a groove, which comprises the following steps: arranging suspension protection of the underground pipeline, excavating part of the soil under the underground pipeline, and then constructing a single-width underground continuous wall construction section through the underground pipeline. Rotary drilling holes; put half-width steel retaining walls in the construction section of the single-width diaphragm wall that goes down the underground pipeline, so that the two half-width steel retaining walls just enclose the construction section of the single-width diaphragm wall that goes down the underground pipeline; Step 6, use two The impact drilling rig pushes the half-width steel retaining wall into the ground; the hydraulic grab buckets are used to form grooves on both sides of the underground pipeline to the design depth, and then the high-pressure rotary jet machine is used to tilt down the soil under the underground pipeline to form holes; in the underground pipeline The hydraulic grab tank on one side is filled with clean water, so that the clean water is injected into the hydraulic grab tank on the other side of the underground pipeline from the rotary nozzle and gradually crushes the soil under the underground pipeline. The invention can not only make changes to the underground pipelines, but also overcome the shortcomings of manual construction in the reverse method.

Description

technical field [0001] The invention relates to the field of underground continuous wall construction. More specifically, the present invention relates to a method for excavating trenches in an underground continuous wall. Background technique [0002] The underground diaphragm wall is a kind of trenching machine used on the ground for basic engineering. Along the peripheral axis of the deep excavation project, a long and narrow deep trench is excavated under the condition of mud retaining wall. After the trench is cleaned, it is hung in the trench Reinforcement cages, and then use the conduit method to pour underwater concrete to form a unit trough section. In this way, a continuous reinforced concrete wall is built underground as a water interception, anti-seepage, load-bearing, and water-retaining structure. [0003] However, in the construction process of the underground diaphragm wall, it is often necessary to construct under the existing underground pipeline. Due to t...

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Problems solved by technology

[0005] Still another object of the present invention is to provide a method for excavating underground diaphragm walls to form grooves, which can not only relocate underground pipelines, but also overcome the shortcomings of manual construction in the reverse method

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