Prestress assembly type underground diaphragm wall and construction method thereof

Abstract

The invention discloses a prestress assembly type underground diaphragm wall which comprises unit walls I and unit walls II which are alternately connected to form an annular structure or a polygonal structure in a surrounding manner, the adjacent ends of the unit walls I and the unit walls II are paired with each other to form closed cavities, and concrete is poured into the closed cavities so that the unit walls I and the unit walls II can be connected and fixed; the unit walls I and the unit walls II are each of a box type structure internally provided with a cavity, and reinforcement cage structures are embedded in the box type structures; and each reinforcement cage structure comprises steel bars I transversely arranged on the transverse portion of the corresponding box type structure, steel bars II vertically arranged on the transverse portion and the longitudinal portion of the corresponding box type structure, tie bars used for hooping parts of the steel bars II in the transverse portion and stirrups I used for hooping the steel bars II at the corresponding positions of the vertical portion. By means of the arrangement, the underground diaphragm wall is good in water resistance property, construction is simple, and connection is reliable.

Description

technical field [0001] The invention relates to an assembled continuous wall structure, in particular to a prestressed assembled underground continuous wall and a construction method thereof. Background technique [0002] The enclosure structure of the foundation pit in the water-rich area mainly adopts the underground diaphragm wall, which is generally a cast-in-place structure, and the joints of the groove section of the ground wall are mostly I-shaped steel joints. The cast-in-place underground diaphragm wall needs to build guide walls along both sides of the axis of the underground wall before excavating the trench section of the diaphragm wall, and then excavate the trench section of the diaphragm wall. The hoisting equipment lifts the reinforcement cage into the groove section of the ground connection wall, and finally pours concrete to form the enclosure structure of the underground foundation pit. However, the cast-in-place structure of the underground diaphragm wall...

AI Technical Summary

Problems solved by technology

[0003] 1. The on-site tying of the reinforcement cage requires a large site; when lifting the reinforcement cage, a lot of equipment is required;

[0004] 2. The lifting clearance is large and the construction risk is high;

[0005] 3. In addition, the concrete needs to be poured underwater and cannot be vibrated, the quality of the wall is difficult to guarantee, and the joints are prone to leaks

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