Tunnel ditch cover plate

Abstract

The invention discloses a tunnel ditch cover plate which is characterized in that a first tooth root is arranged at the bottom of one side of the cover plate, and a second tooth root is arranged at the bottom of the other side of the cover plate. The tunnel ditch cover plate has the advantages of greatly improving water capacity of a pitch, effectively resolving the problem of tunnel water discharge without arranging an embedding part and a building block and facilitating construction. Simultaneously, the novel cover plate utilizes the pavement layer thickness part in a tunnel and does not affect a main body structure. System members are suitable for various tunnel structures. An opening cover plate and a fixed cover plate can be arranged at intervals for further maintenance, or only the opening cover plate is arranged to facilitate maintenance and dredging. The novel cover plate is stable and excellent in performance and capable of resolving the problem of sudden cover skipping.

Description

technical field [0001] The invention relates to the field of tunnel structures, in particular to a tunnel side ditch cover plate. Background technique [0002] At present, in the design of urban tunnels, in order to ensure smooth drainage in rainy days and no water accumulation in the tunnels, a side ditch is set at the lowest side of the tunnel’s transverse slope to guide rainwater into the rainwater collection pipe, which is conducive to improving the longitudinal drainage of the tunnel. measures. [0003] The side ditch setting is based on the principle of not intruding into the tunnel structure, and the pavement layer is used. Generally, the thickness of the pavement layer at the side ditch (that is, the lowest point of the transverse slope) is set to 15cm~25cm, the depth of the side ditch is 15cm~25cm, and the width is 10cm~40cm , There is a cover grid on the side ditch. The material of the cover grid is generally cast iron, glass fiber reinforced plastic, reinforced c...

AI Technical Summary

Problems solved by technology

[0004] The construction process of these cover plates is cumbersome, easily damaged, and easy to jump off the cover, and its disadvantages become more and more obvious during use

For these reasons, designers are often reluctant to set side ditches when designing tunnels. However, when the rainfall and flow rate exceed the normative standard (once in a century), the rainwater that rushes into the tunnel is often too late to be discharged from the rainwater well, resulting in water accumulation in the tunnel.

On August 25, 2008, the torrential rain in Shanghai caused many water accumulations in the middle ring road tunnel, resulting in long-term traffic interruption

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