Box type top plate structure of city tunnel fork

Abstract

The invention discloses a box type top plate structure of a city tunnel fork. The box type top plate structure comprises a top plate body, and the left portion and the right portion of the upper end of the top plate body are in threaded connection with connecting devices. The top plate body comprises an upper top plate, a lower top plate and a waterproof plate, and three empty box chambers are formed in the middle of the top plate body. An upper reinforcing device and a lower reinforcing device are fixedly connected between the three empty box chambers, and pouring holes are formed in the leftportion and the right portion of the top plate body. According to the box type top plate structure of the city tunnel fork, guide columns mounted on upper side beams and guide holes formed in lower side beams are utilized for guiding, so that the upper top plate is fast aligned to the lower top plate, and then the construction speed is increased; by means of the empty box chambers, the dead weight of the top plate structure can be reduced, so that the economical efficiency of the top plate body is higher, the loading capacity of the top plate body can be enhanced through reinforcing ribs, andthen the bearing capacity of the structure top plate body is improved; and in addition, the durability of the top plate body can be improved through a waterproof layer.

Description

technical field [0001] The invention relates to the technical field of urban tunnel construction, in particular to a box-shaped roof structure of an urban tunnel bifurcation. Background technique [0002] With the development of urban tunnel construction, its functional requirements are getting higher and higher. In most cases, urban tunnels only need to meet the traffic demand in one direction, but sometimes it is necessary to consider the diversion and connection of traffic in multiple directions. At this time, the complex form of tunnel bifurcation emerges as the times require. However, the roof structure used for tunnel bifurcations often has the following defects: 1. The installation speed of the existing roof structure is slow, and it is not conducive to subsequent maintenance and disassembly work, which slows down the tunnel construction speed; 2. The existing roof structure has a large deadweight , so that the economic performance is poor; 3. The existing roof struc...

AI Technical Summary

Problems solved by technology

However, the roof structure used for tunnel bifurcations often has the following defects: 1. The installation speed of the existing roof structure is slow, and it is not conducive to subsequent maintenance and disassembly work, which slows down the tunnel construction speed; 2. The existing roof structure has a large deadweight , so that the economic performance is poor; 3. The existing roof structure is prone to breakage and cracking during a period of use, so that the supporting load of the roof structure is not high, and the bearing capacity is not strong; 4. When the existing roof structure is buried underground , while the thickness of the covering soil cannot be effectively reduced, the waterproof performance of the roof is poor, resulting in poor durability

Images