Assembling integral type underground structure allowing vulnerable portions of prefabricated columns to be replaced

Abstract

The invention provides an assembling integral type underground structure allowing vulnerable portions of prefabricated columns to be replaced, belongs to the technical field of civil engineering application and particularly relates to the technical field of connection of assembling type underground structure prefabricated parts. Prefabricated top beams and prefabricated bottom beams of a metro station are connected with prefabricated inner columns through shearing force bolt pins, fixed connection of structure connecting joints can be converted into swinging connection, and bending moment restraining of column ends is released. Meanwhile, the vulnerable portions of column corners of the upper end and the lower end of the prefabricated columns can be substituted by the adoption of high-elasticity and high-toughness materials and can also be replaced, and the function of reducing stress concentration on column feet is achieved. According to the assembling integral type underground structure, the method for connecting the bottom beams and the top beams with the inner columns can be used for solving the connection problem of the assembling type parts, thus, on the same stress condition, the stress pattern of the prefabricated columns is improved, meanwhile, the vulnerable parts can be replaced locally, and the function of repairing the prefabricated parts fast is achieved.

Description

technical field [0001] The invention relates to the technical field of prefabricated underground structure connection, in particular to a structural form in which vulnerable parts of inner columns of a prefabricated subway station can be set as replaceable parts, and belongs to the technical field of civil engineering applications. Background technique [0002] For the underground structure, the inner column of the station is a key component affecting the seismic performance of the subway station. Under the action of vertical ground motion, the axial compression ratio of the inner column increases significantly, resulting in the obvious insufficient deformation capacity of the inner column. For the cast-in-place subway station structure, the inner column is "consolidated" connected to the roof and floor of the station structure. This method makes the inner column bear the joint action of bending moment, shear force and axial force. Changing the connection mode of the inner ...

AI Technical Summary

Problems solved by technology

Changing the connection mode of the inner column to the shear pin (9) can effectively release the bending moment constraint at the column end and improve the deformation capacity of the inner column. However, under the action of earthquake load, the inner column of the prefabricated component When the bolt swings, stress concentration will occur at the corners of the upper and lower ends of the inner column, which will cause the end of the inner column to be easily damaged

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