Connection method of prefabricated piles in foundation pit and stirrups of cast-in-place laminated lining walls

Abstract

The invention discloses a connecting method of a foundation pit precast pile and a cast-in-situ superposed lining wall through stirrups. The method includes the following steps that after the size of the precast pile is determined according to design, a main rib and the stirrups of the pile are arranged, a connecting steel plate is arranged on the joint of the pile stirrups and the wall stirrups along a pile body, and pile connecting holes and wall connecting holes are formed in the connecting steel plate; connecting ribs of the pile stirrups are fixedly connected with the connecting steel plate through the pile connecting holes, and the wall connecting holes are plugged through plugging materials; pile concrete is poured, the precast pile is beaten into the designed position of a foundation pit after the designed strength is achieved through curing, the plugging materials are removed after excavation of the foundation pit is completed, and the wall connecting holes are exposed; and according to the design requirement, the main rib, the stirrups and a bent rib are arranged at the corresponding positions of a cast-in-situ wall, connecting ribs of the wall stirrups in the cast-in-situ wall are fixedly connected with the connecting steel plate through the wall connecting holes, concrete of the cast-in-situ wall is poured after connection is completed, and connection of the precast pile and the cast-in-situ superposed wall is completed.

Description

technical field [0001] The invention relates to a method for connecting pile body stirrups and cast-in-place composite wall stirrups when prefabricated piles are used as surrounding protection piles during foundation pit excavation, and belongs to the technical field of underground engineering construction. Background technique [0002] With the development of society, the increase of labor costs and the requirements of environmental protection, the advantages of industrialized production buildings will become more and more obvious, so it is necessary to strengthen the design and research of industrialized buildings. In the excavation of foundation pits, in order to promote the industrialization of foundation pit engineering and save construction time, prefabricated components have gradually been used for construction on site, such as prefabricated piles, prefabricated column piles, and prefabricated continuous walls. However, when prefabricated components are connected with...

AI Technical Summary

Problems solved by technology

[0005] 1. For the case of pre-embedded connectors on the prefabricated piles, the stirrups connecting the piles and the wall, when the size of the prefabricated piles is small, too many connectors will affect the pile quality of the prefabricated piles, and the embedded parts The position will become the weak point of the anti-seepage of the wall, and a seepage path will be formed around the embedded parts, which will affect the anti-seepage performance of the wall;

[0006] 2. For the case where the reserved rebar is used as the connecting rebar, when the rebar is Class I steel or the diameter is large, the secondary bending will cause plastic damage to the rebar and affect the quality of the connecting rebar

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