Underground three-layer large-span column-free station structure

Abstract

The invention provides an underground three-layer large-span column-free station structure, and belongs to the field of underground structure engineering of urban rail transit and municipal engineering. A top plate and a bottom plate are arched with uniform section thickness, a middle plate is reinforced by adopting flat plates with uniform thickness and haunch angles, and a side wall adopts a vertical section with uniform thickness, so that vertical columns are not arranged in a stress system of an open-cut three-layer station main structure, the structural form of longitudinal beams of each layer is canceled, and the open-cut three-layer station main structure is successfully applied in actual engineering. According to the structure, equipment and facilities in a station are flexibly arranged, the space in the station is fully utilized, and the scale of the station is effectively reduced; and on the premise that the structural safety of the station is guaranteed, the structural stress characteristic is improved, the structural size and arrangement are optimized, additional anti-floating measures of the station are reduced, the construction steps are reduced, the construction quality is guaranteed, the engineering investment is saved, and good application prospects and popularization values are achieved.

Description

technical field [0001] The invention belongs to the field of underground structure engineering of urban rail transit and municipal engineering, and specifically relates to an underground three-story large-span column-free station structure. Background technique [0002] At present, the structure of urban rail transit underground stations is generally single-story multi-span, multi-story multi-span with pillar stations, and individual multi-layer single-span pillarless stations. During the construction, most of them adopt the open-cut structure scheme, and a few adopt the underground excavation or cover-excavation scheme. [0003] The above schemes have actual cases in actual projects, but there are also shortcomings: [0004] 1. For single-story multi-span and multi-story multi-span stations with columns, the existence of frame columns is not conducive to the flexible arrangement of equipment and facilities inside the station, but also makes the space permeability of the st...

AI Technical Summary

Problems solved by technology

[0004] 1. For single-story multi-span and multi-story multi-span stations with columns, the existence of frame columns is not conducive to the flexible arrangement of equipment and facilities inside the station, but also makes the space permeability of the station worse, the view is blocked, and the passenger flow remains unchanged. , which greatly reduces the space utilization rate of the station platform and station hall

[0005] 2. Multi-storey single-span stations are generally used for double-deck column-free island-style stations with smaller platform widths of less than 9m. With the densification of the rail transit network and the continuous increase in urban traffic, the number of three-story transfer stations continues to increase. The double-deck pillar-less island station with small platform width has gradually been unable to meet the needs of transfer and large passenger flow

Among them, the structural internal force of densely ribbed beam and variable section slab is extremely large, and the component size is very large, which is very uneconomical; the construction technology of prestressed reinforced concrete box girder structure is complicated, and underground construction is extremely difficult

[0007] To sum up, the current single-story multi-span and multi-layer multi-span pillared stations are not conducive to the flexible arrangement of internal equipment and facilities and the full utilization of station space; and the double-deck pillarless stations are gradually unable to meet the needs of transfers and large passenger flows. And there are large structural stress and uneconomical conditions

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