Method for constructing underground continuous wall in bedrocks

Abstract

The invention discloses a method for constructingan underground continuous wall in bedrocks, and relates to the technical field of building construction. Themethod for constructingthe underground continuous wall in the bedrockscomprises the following step thatSl, measurement is prepared, specifically, according to a horizontal control point provided by an owner, a closed planar conducting wire is arranged at the periphery of a foundation pit, during construction of theundergroundcontinuous wall, an axis casting point adopts a polar coordinate method,according to the closed conducting wire at the periphery of the foundation pit and a reference point, the control point of each main axisiscasted, then each axis is guided to be tested by usinga total station,and during construction, conducting wireand axis reference control pointsare periodically retested.According to the method for constructing the underground continuous wall in the bedrock, a combined trenching machine consisting of a rotary drilling rig and an impact holing drilling rig is adopted to effectively solve the problem that the trenching machine cannot construct during normal construction in the bedrocks, the construction progress is accelerated,the construction efficiency is improved, a large amount ofeasily generated sediment when a steel cage is placed lateris avoided, overall operation is convenient, and the overall operation efficiency is high.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a method for constructing an underground diaphragm wall in bedrock. Background technique [0002] The underground diaphragm wall excavation technology originated in Europe. It was developed according to the method of drilling wells and oil wells using mud and underwater pouring concrete. The underground diaphragm wall is a basic engineering that uses a trenching machine on the ground along For the peripheral axis of the deep excavation project, a narrow and long deep groove is excavated under the condition of mud retaining wall. After the groove is cleaned, a steel cage is hung in the groove, and then the underwater concrete is poured by the conduit method to form a unit groove section. In this way, a continuous reinforced concrete wall is built underground as a water interception, seepage prevention, load bearing, and water retaining structure. The characteristics ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for constructing an underground continuous wall in the bedrock, which solves the problem that when the bottom is the bedrock, the grab bucket cannot insert the bucket teeth into it by its own weight, and the action of closing and grabbing soil cannot be completed. Therefore, in the hard ground, the hydraulic grab cannot complete the hole-forming construction, and the grooves cannot be fully cleaned during the construction process, resulting in a large amount of sediment that is likely to be generated when the reinforcement cage is placed later, the overall operation is more inconvenient, and the overall operation efficiency lower question