Cast-in-place prestressed concrete foundation pit supporting structure and construction method thereof

Abstract

The invention provides a cast-in-place prestressed concrete foundation pit supporting structure and a construction method thereof. The supporting structure comprises a a steel reinforcement cage, thesteel reinforcement cage is formed by binding prestressed steel bars and common steel bars. The upper middle portion of each prestressed steel bar is sleeved with a corrugated pipe, a plurality of layers of end plates are arranged at the lower portions of the prestressed steel bars, the multiple prestressed steel bars are connected into a whole, a grouting reserved duct is arranged at the end, away from each end plate, of the corresponding corrugated pipe, and a detachable anchor device is assembled at the upper end of each prestressed steel bar. According to the structure, due to the fact that prestress is applied in advance, the influence of structure breakage damage can be effectively reduced, when the structure is applied to the foundation pit engineering with the tensile requirement,the concrete cracking degree can be controlled by applying prestress force in advance, the tensile strength of the structure is effectively improved, in the foundation pit engineering, prestress is applied to the pulled side in advance, the structure generates deformation opposite to deformation generated by the load effect in advance, and the structure rigidity, bending resistance and deformationcontrol capability are effectively improved.

Description

Technical field: [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a cast-in-place prestressed concrete foundation pit support structure and a construction method thereof. Background technique: [0002] Pile and diaphragm wall are two basic structural forms commonly used in geotechnical engineering and are widely used. In foundation projects such as housing construction, highways, and railways, pile foundations are the structural form with the highest utilization rate, and in foundation pit engineering such as housing construction foundation pits, subway stations, and starting and receiving shafts, row piles and underground diaphragm walls are also One of the preferred structural forms. [0003] Pile can be divided into cast-in-place pile and prefabricated pile. Cast-in-situ piles can be used in both foundation pit engineering and foundation engineering, while prefabricated piles are generally only used in the field of f...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned defects, to develop a prefabricated structure that can not only avoid the problems of lengthening of prefabricated structural members, inconvenient transportation and easy leakage of joints, but also improve the tensile, bending and deformation control capabilities of cast-in-place structures. Cast-in-place prestressed concrete foundation pit support structure and its construction method

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