Steel reinforced concrete column type joint and construction method of underground diaphragm wall using same

Abstract

The invention discloses a steel reinforced concrete column type joint and a construction method of an underground diaphragm wall using the same. The joint comprises a II-shaped section steel (1) and two later-stage groove-section reinforcing cages (3). The construction method mainly comprises the following steps of: (1) construction of the steel reinforced concrete column type joint; (2) construction of the groove section; and (3) reinforcement of a high-pressure rotary spraying pile at the joint. Through the steel reinforced concrete column type joint disclosed by the invention, the overall rigidity and anti-permeation performance of the groove-section connection structure of the underground diaphragm wall are enhanced; through the construction method of the underground diaphragm wall using the same, disclosed by the invention, the construction of the steel reinforced concrete column type joint and the construction of the groove section can be performed in a streamline manner, and the construction efficiency is improved; and moreover, the construction can be all performed according to a closed wall, and the length of the reinforcing cage is reduced, thereby being more favorable for guaranteeing the construction quality and construction period.

Description

technical field [0001] The invention relates to a construction method of an underground diaphragm wall, in particular to a steel concrete column joint and a construction method of an underground diaphragm wall using the joint. Background technique [0002] The underground diaphragm wall refers to the use of various grooving machines to dig out narrow and deep trenches underground with the help of mud wall protection, and pour appropriate materials into them to form a seepage-proof (water) and soil-retaining trench. and load-bearing function of the continuous underground wall. [0003] 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. In 1950, the retaining wall mud underground diaphragm wall construction was first adopted in Milan, Italy. In the 1950s ~ In the 1960s, this technology was promoted in western developed countries and the f...

AI Technical Summary

Problems solved by technology

[0005] The main construction techniques of the existing underground diaphragm wall include guide wall, mud retaining wall, groove construction, underwater concrete pouring, wall section joint treatment, etc., and the construction efficiency is relatively low; the wall section joints mainly use joint pipes and I-shaped steel joints etc. For some complex geological conditions, the overall stiffness and anti-seepage performance of the wall section connection structure of this type of underground diaphragm wall cannot meet the design requirements.

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