Construction method of underground continuous wall below viaduct

Abstract

The invention relates to a construction method of an underground continuous wall below a viaduct. The method specifically includes the first step of staking out in a survey, the second step of guiding wall manufacturing, the third step of width adjustment of the underground continuous wall, the fourth step of slurry preparation, the fifth step of grooving construction, the sixth step of reinforcement cage manufacturing, hoisting and releasing, the seventh step of concrete grouting, the eighth step of repeatedly executing the fifth step, the sixth step and the seventh step till construction of a to-be-formed single-width undergrou nd continuous wall construction unit ends, and the ninth step of underground continuous wall joint processing. By means of the construction method, construction of the underground continuous wall can be fast completed while the quality and the quantity are guaranteed, and a viaduct pier will not be affected. Compared with a cast-in-situ bored pile construction method, the construction method has the beneficial effects that construction speed is high in the construction progress, stratum disturbance is small, and therefore the influences on the viaduct pier are small.

Description

technical field [0001] The invention belongs to the field of construction of an underground diaphragm wall, in particular to a construction method of an underground diaphragm wall under a viaduct. Background technique [0002] The excavation technology of underground diaphragm wall originated in Europe. It was developed based on the method of using mud and underwater concrete for drilling wells and oil wells. In 1950, Milan, Italy first adopted the construction of retaining mud underground diaphragm walls. In the 1950s and 1960s, this technology was developed in western developed countries. It was promoted in the former Soviet Union and became an effective technology in underground engineering and deep foundation construction. [0003] 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 ...

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Problems solved by technology

[0004] However, with the increase in the complexity of the production site conditions in the development of underground space, there may be deep foundation pit projects that need to be constructed under the viaduct. Because the clearance of the construction site under the viaduct is limited by the height of the structure and consideration is given to reducing the impact of the construction of the underground diaphragm wall under the bridge deck on the viaduct pier Influenced by the impact of the viaduct, the underground diaphragm wall under the viaduct cannot adopt the conventional underground diaphragm wall construction method

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