Prestressed Concrete Cantilever Support Structure with Controllable Deformation and Its Design and Construction Method

Abstract

The invention discloses a deformation-controllable prestressed concrete cantilever supporting structure and a design and construction method thereof, and relates to the field of geotechnical engineering. The structure comprises a common concrete cantilever supporting structure, prestressed tendons, fixing ends, and stretching ends. The stretching ends and the fixing ends are respectively on the upper ends and the lower ends of the prestressed tendons. The prestressed tendons and the fixing ends are arranged in the common concrete cantilever supporting structure. The stretching ends are anchored on the top end and / or the side wall of the common concrete cantilever supporting structure. The construction method is: arranging the prestressed tendons and anchorage devices of the prestressed tendon fixing ends in a reinforcement cage; lowering the reinforcement cage in a hole or a groove; concreting and constructing a top beam; and tensioning the prestressed tendons according to a pre-designed tensioning scheme, and anchoring the prestressed tendons on the stretching ends, so as to complete construction. The structure and the method solve problems that a common cantilever supporting structure is excessive in deformation, and configuring the prestressed tendons can obviously improve bearing capacity of the supporting structure, and a problem that a common cantilever supporting structure is excessive in size is solved.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a controllable deformation prestressed concrete cantilever support structure and a design and construction method thereof. Background technique [0002] For foundation pits exceeding a certain depth, the supporting structure adopts support piles or underground diaphragm walls with anchor rods or internal supports to reduce the structural internal force of pile rows and underground diaphragm walls and reduce structural deformation. At present, in the actual foundation pit engineering, the support structure using prestressed anchors or internal supports is increasingly limited by the following practical problems: 1) Restricted by land resources and the red line of construction land, prestressed anchors are bound to exceed the red line, It caused the problem of encroaching on the use rights of adjacent land, and caused adverse effects on the subsequent development of adjacent...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a controllable deformation prestressed concrete cantilever support structure and its design and construction method, thereby solving the aforementioned problems existing in the prior art

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