A semi-prefabricated underground diaphragm wall and its construction method

Abstract

The invention discloses a semi-prefabricated underground continuous wall and a construction method thereof. The continuous wall comprises a lower prefabricated wall and an upper post-poured wall. The lower prefabricated wall comprises a plurality of prefabricated wall sections; a connecting rib is arranged at the tops of the prefabricated wall sections; the adjacent prefabricated wall sections are connected by use of a steel pipe joint, and a plurality of through holes are formed in the wall, connected with the prefabricated sections, of the steel pipe joint. The upper post-poured wall is a cast-in-place reinforced concrete structure; a spiral stirrup is vertically arranged in the middle of the reinforcement cage of the upper post-poured wall; the part, exceeding the prefabricated wall sections, of the steel joint is arranged in the spiral stirrup; the reinforcement cage is connected and fixed with the connecting rib. The semi-prefabricated underground continuous wall is integrated with the advantages of the cast-in-place underground continuous wall and the prefabricated underground continuous wall, and the easily occurring defects of the cast-in-place underground continuous wall and the prefabricated underground continuous wall can be avoided reasonably. The lower part of each wall section is the prefabricated wall section, and therefore, the construction difficulty of the continuous wall is greatly reduced and the construction quality of the continuous wall is easy to guarantee.

Description

technical field [0001] The invention relates to the field of design and construction of an underground diaphragm wall in building foundation pit engineering, in particular to a semi-prefabricated underground diaphragm wall and a construction method for the underground diaphragm wall. Background technique [0002] The underground diaphragm wall construction technology originated in Europe. In 1938, Italy developed a construction method for constructing an underground diaphragm wall in a mud support deep groove. In 1950, it was the first to use deep mud tanks to build underground diaphragm walls in Italy. In the 1950s and 1960s, this technology was promoted in western developed countries, the former Soviet Union and Japan. In 1958, my country used this technology to build a dam cut-off wall. In the mid-1970s, this technology was applied to construction, coal mines and municipal industries. Due to its high rigidity, the underground diaphragm wall has the advantage of having l...

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: Aiming at the above-mentioned prior art, a semi-prefabricated underground diaphragm wall and its construction method are proposed to reduce the impact of the construction of the underground diaphragm wall by the stratum and solve the problem that groundwater leakage is prone to occur at the joint of the prefabricated underground diaphragm wall

Images