X-shaped connection prefabricated laminated split column for underground structure

Abstract

The invention discloses an X-shaped connection prefabricated laminated split column for an underground structure. The X-shaped connection prefabricated laminated split column is composed of prefabricated reinforced concrete column sections, prestressed steel bars, X-shaped connecting pieces, an externally wrapping thin steel plate, reserved connecting rebars and reserved high-strength bolts. Series-connection hollow holes are reserved in the sections of the prefabricated reinforced concrete column sections, protruding rebars are reserved at sections connected with beams, and the high-strengthbolts are reserved on the two adjacent side faces. The prefabricated reinforced concrete column sections are connected in series through the prestressed steel bars to form split column bodies with thehigh shear span ratio. The prefabricated reinforced concrete column sections on the adjacent faces are connected by the X-shaped connecting pieces through the reserved high-strength bolts. The exteriors of the externally wrapping thin steel plate are affixed to the outer sides of the prefabricated concrete sections to overall wrap the split column bodies which are formed in a series connection mode and connected in pairs and connection gaps between the split column bodies, so that the functionality of the laminated split column in a normal use state is ensured. The X-shaped connection prefabricated laminated split column can be applied to a key part of the underground structure, and the overall seismic performance of the structure is improved.

Description

technical field [0001] The invention relates to the field of underground structure engineering construction, in particular to a prefabricated laminated split column for X-shaped connection of underground structures, and belongs to the field of anti-seismic technology of prefabricated subway stations. Background technique [0002] At present, most cities in the world have built a variety of underground structure facilities including subway networks, comprehensive pipe corridors, underground shopping malls, etc. These underground structure projects have been widely used in various fields of the national economy, which greatly alleviates The problem of scarcity of urban land resources. [0003] In the field of urban transportation, the large-capacity rapid public transportation system with the subway project as the backbone plays an indispensable role in solving urban transportation problems. Although the development of underground engineering is booming day by day, undergroun...

AI Technical Summary

Problems solved by technology

At the same time, the changes in the axial compression ratio of the supporting members in the structure are not consistent. For box-shaped subway stations, the change in the axial compression ratio of the central column is much higher than that of the side walls, which makes the central column deform laterally. While the capacity is reduced, it bears more horizontal shear force, which induces the center column to fail before the side wall, resulting in the overall collapse

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