A method for installing a tunnel safety protection net

Abstract

The invention discloses a tunnel safety protection net and an installation method. The invention aims to provide a tunnel safety protection net with convenient assembly and disassembly, good protection performance and low cost. When the tunnel safety protection net is installed, it is fixedly connected with the anchor rod of the tunnel roof arch, which includes a supporting steel rope net fixedly connected with the anchor rod, a SO / 2.2 / 50 type steel wire grid mesh fixedly connected under the supporting steel rope net and The DO / 08 / 300 type steel wire mesh installed under the SO / 2.2 / 50 type steel wire grid; the supporting steel rope mesh is made of steel ropes with a diameter of φ16㎜, and the mesh spacing is 4500㎜×4500㎜; The DO / 08 / 300 type steel wire mesh is fixedly connected with the supporting steel rope mesh with a suture rope of φ8㎜. The installation of the tunnel protection net can greatly reduce the threat of the tunnel top arch falling block to the construction below, eliminate the safety hazard of the tunnel falling block, ensure the safety of construction personnel and equipment in the tunnel, and produce better economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower civil engineering, in particular to a tunnel safety protection net and an installation method. Background technique [0002] Large-section tunnels are excavated in layers from top to bottom. After the excavation and support of the top layer of the tunnel is completed, during the excavation process of the middle and lower layers, the stress adjustment of the tunnel top arch has a continual process, resulting in the spraying of the tunnel top arch. Part of the concrete or rock falls off and falls off, which poses a certain safety threat to the construction personnel and machinery in the lower part of the tunnel. In response to this situation, the traditional treatment method is mainly to use manual regular or irregular inspections and investigations. If cracks are found in the concrete or rock stratum sprayed on the tunnel arch, manual and mechanical prying are used to deal ...

AI Technical Summary

Problems solved by technology

[0002] Large-section tunnels are excavated in layers from top to bottom. After the excavation and support of the top layer of the tunnel is completed, during the excavation process of the middle and lower layers, the stress adjustment of the tunnel top arch has a continual process, resulting in the spraying of the tunnel top arch. Part of the concrete or rock falls off and falls off, which poses a certain safety threat to the construction personnel and machinery in the lower part of the tunnel.

In response to this situation, the traditional treatment method is mainly to use manual regular or irregular inspections and investigations. If cracks are found in the concrete or rock stratum sprayed on the tunnel arch, manual and mechanical prying are used to deal with it. The construction risk is extremely high and the safety is random. great

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