Construction Method of Upside-Down Diaphragm Wall

Abstract

The invention discloses a method for constructing an underground diaphragm wall in reverse, which comprises the following steps: constructing an outer wall body at the upper part of the diaphragm wall on the soil body of the diaphragm wall by adopting a reverse method of manual excavation. A grooving machine is used to form a groove for forming the lower wall of the ground connection wall on the level of the upper outer wall of the ground connection wall, and the groove is located on the inner side of the upper outer wall of the ground connection wall. The lower wall body of the ground connection wall is formed by casting in the groove. The upper inner wall of the ground connecting wall is poured into the gap formed by the lower wall of the ground connecting wall and the upper outer wall of the ground connecting wall, so that the upper outer wall of the ground connecting wall, the upper inner wall of the ground connecting wall and the ground The lower wall body of the connecting wall constitutes the underground continuous wall to be constructed. In the reverse underground diaphragm wall construction method of the present invention, by adopting the mode of "manual reverse operation + mechanical groove formation", it not only ensures the safety of excavation construction, but also ensures the construction progress requirements, and is not prone to water leakage , which greatly facilitates the later foundation pit excavation construction.

Description

technical field [0001] The invention relates to the field of construction of underground diaphragm walls, in particular to a method for reverse construction of an underground diaphragm wall. Background technique [0002] With the vigorous development of urban construction in our country, a large number of underground projects have been developed. In the construction technology of underground projects, underground diaphragm walls are widely used as the main body of building foundation pit enclosure such as retaining soil, anti-seepage and load-bearing of permanent main structure of high-rise buildings. During construction, the underground diaphragm wall cannot be constructed normally due to the presence of pipelines above the foundation pit or other buildings around the foundation pit. The reverse construction of the underground diaphragm wall is a new technology based on this situation. [0003] During the traditional upside-down underground diaphragm wall construction, manu...

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Problems solved by technology

[0004] The invention provides a construction method of reverse underground diaphragm wall to solve the technical problems of long construction period, high construction risk and poor waterproof effect existing in the construction of the existing underground diaphragm wall

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