Box type top plate structure for large-span city tunnel

Abstract

The invention discloses a box type top plate structure for a large-span city tunnel. The box type top plate structure for the large-span city tunnel comprises a tunnel top plate, wherein the tunnel top plate comprises upper plates and lower plates, and the upper plates and the lower plates are arranged between tunnel side walls in a spaced mode; end plates are correspondingly arranged at the two ends of a cavity formed by enclosing the upper plates, the lower plates and the tunnel side walls; and the inner part of the cavity is divided into a plurality of box chambers arranged in the longitudinal direction by webs, form stripping holes are formed in the upper plates of all the box chambers, the lower plates of all the box chambers all adopt waterproof mortar to find a slope, and ventilation drainage holes are formed in the lower plates. A continuous beam structure of the box type top plate structure for the large-span city tunnel is convenient to design and construct, the top plate self weight and soil covering thickness can be reduced, and then loads borne by the top plate, even the side walls, middle walls and a bottom plate are reduced; and especially, when prestressing force isset, the span of a city tunnel cross section can be enlarged to a greater extent, and the regular rebar use quantity required by crack-resistant design control is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of municipal engineering urban tunnel structure design and construction, in particular to a box-shaped roof structure for large-span urban tunnels. Background technique [0002] With the development of economy, the problem of urban traffic congestion is becoming more and more serious. In order to alleviate congestion, urban tunnel construction has developed rapidly, and urban tunnels are developing in the direction of mechanical automation, large spans, and long mileage. For tunnel structures with large section spans, arched roof structures or folded plate roof structures are generally used at present. In order to meet the crack control requirements, the roof of the above form has a relatively large thickness and a large amount of reinforcement, and the construction is inconvenient. If the roof is designed as a solid flat plate structure, it can bring some convenience to the construction, but the thickness...

AI Technical Summary

Problems solved by technology

In order to meet the crack control requirements, the roof of the above form has a relatively large thickness and a large amount of reinforcement, and the construction is relatively inconvenient

If the roof is designed as a solid flat plate structure, it can bring some convenience to the construction, but the thickness and amount of reinforcement of the roof are much larger than that of the arched roof and the folded roof, and the structure is not reasonable and uneconomical. When the buried depth of the tunnel structure is large, the thickness of the covering soil on the roof of the tunnel structure cannot be effectively reduced

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