Variable cross section construction method for underground continuous wall

Abstract

The invention discloses a variable cross section construction method for an underground continuous wall. The method comprises the following steps: surveying and setting out; constructing a guide wall; arranging a mud pit; processing lead holes in the groove segment of the underground continuous wall; taking soil with a grab machine to form a groove; cleaning the formed groove; preparing for hoisting a reinforcing cage; hoisting the reinforcing cage; and casting underwater concrete for the continuous wall, assembling a square caisson, hoisting and filling. The variable cross section construction method for the underground continuous wall has the advantages that the cost is low, the chisel workload of the follow-up construction is reduced, the construction period is short, the construction quality is stable, and the construction is convenient.

Description

technical field [0001] The invention relates to a construction method, in particular to a variable-section construction method of an underground continuous wall. Background technique [0002] Compared with the ordinary underground diaphragm wall construction, the construction is more difficult due to a series of requirements such as the processing and manufacture of the steel cage of the variable cross-section underground diaphragm wall, the design of the lifting point of the steel cage, and the selection of the concrete pouring method for the cavity. Among them, in the processing and production of the reinforcement cage of the ground connection wall, the reinforcement cage of the underground diaphragm wall is composed of steel bars and shaped steel columns. progress, and the quality of on-site welding cannot be guaranteed. In the design of the lifting point of the reinforcement cage, the number of pulleys on the existing pole beam is two, and the eccentric force is applied...

AI Technical Summary

Problems solved by technology

Among them, in the processing and production of the reinforcement cage of the ground connection wall, the reinforcement cage of the underground diaphragm wall is composed of steel bars and shaped steel columns. progress, and the quality of on-site welding cannot be guaranteed

In the design of the lifting point of the reinforcement cage, the number of pulleys on the existing pole beam is two, and the reinforcement cage is lifted vertically and then eccentrically loaded, making the reinforcement cage in an inclined state, making it difficult to put the reinforcement cage into the groove

In the selection of the concrete pouring method for the variable cross-section cavity, how to deal with the cavity range has become an important and difficult point of this project. If the plain concrete is directly poured to be level with the top of the other side wall, the cost of concrete materials will be increased, and the future cost will be increased. For the amount of chiseling work, if the side sealing steel plate is used, the cavity will be filled with sandbags, which will easily cause the wall to tilt, which will bring serious hidden dangers to the quality of the project

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