Through the knowledge collation of the architectural knowledge column of this website, Zhong Da Consulting has made the following basic understanding of the subway tunnel project:
Subway tunnel is a kind of tunnel, which refers to an engineering building buried in the stratum and a form of human using underground space. Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels and mine tunnels.
In order to help relevant personnel further understand the relevant contents of subway tunnel excavation, Zhong Da consulted and sorted out the matters needing attention in subway tunnel construction, which are basically summarized as follows:
1. Before the shield arrives, check the reinforcement quality of the end soil to ensure that the reinforcement quality meets the design requirements.
2. Before arrival, prepare sandbags, water pumps, water pipes, square timber, wind cannons and other emergency materials and tools in the cave.
3. Prepare communication tools inside and outside the cave and lighting equipment inside the cave.
4. Increase the monitoring frequency of surface subsidence, and feed back the monitoring results in time to guide the construction.
5. The inner side of the rubber curtain cloth is coated with grease to prevent the cutter head from hanging on the curtain cloth and affecting the sealing effect.
6. When the cutter head of the shield machine is 0.5m away from the tunnel face, the ballast soil in the soil bin should be emptied as far as possible to reduce the extrusion of the tunnel and the end wall and ensure the safety of tunnel concrete construction.
7, after several ring segment shield penetration installation, be sure to ensure that the grouting is full and dense, and must be tightened in time to prevent segment sinking, dislocation and water leakage.
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