Double-layer open-cut tunnel and watertight door structure of double-layer void compartment access manhole thereof

Abstract

The invention provides a double-layer void compartment access system of a double-layer open-cut tunnel and a watertight door structure of an access hole. The double-layer open-cut tunnel comprises structural side walls, a structural top plate, a structural bottom plate and a structural middle plate, wherein the structural middle plate is horizontally arranged between the structural side walls on both sides. The tunnel is divided into a void compartment and a travelling crane layer by the structural middle plate, the access hole is formed in the structural middle plate, maintenance personnel can enter the double-layer void compartment for maintenance, and the watertight door structure is installed at the bottom end of the access hole. A drainage pipe is pre-buried in the tunnel side wall beside the access hole as a preferential drainage measure, and water in the void compartment can be drained into a tunnel drainage ditch through the drainage pipe. A water retaining ridge is arranged atthe upper edge of the access hole as a second water blocking measure, the water in the void compartment can be prevented from flowing into the access hole, and a watertight door can play a final water blocking role. Obviously, the water drainage pipe, the water retaining ridge and the watertight door are arranged, so that the problems that the passage of a vehicle is influenced, and the tunnel side wall is washed due to water leakage of the access hole are effectively solved.

Description

technical field [0001] The invention belongs to the field of double-layer open-cut tunnels, and in particular relates to a double-layer open-cut tunnel and a watertight door structure of a second-layer open-cut tunnel and a second-layer empty cabin inspection hole. Background technique [0002] With the rapid development of my country's traffic construction, cities in my country often need to build a large number of underground tunnels, and when the buried depth of the tunnel is too large, it is necessary to set up a second-story empty cabin to reduce the stress on the tunnel structure. Common diseases such as cracks and water seepage will appear. If effective countermeasures are not taken, the traffic safety of the tunnel will be seriously affected. [0003] At present, in most double-layer open-cut tunnels in China, maintenance personnel cannot enter the empty cabin on the second floor for maintenance. However, since the second-floor empty cabin may have water immersion or...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a double-layer cut-and-cut tunnel and its watertight door structure for the inspection hole of the second-story empty cabin, aiming at solving the problem that in the prior art, maintenance personnel cannot enter the second-story empty cabin for maintenance, and the second-story empty cabin has no drainage. facility problem

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