Thin-covering anti-soil-backing drag reduction measure for rectangular tunnel
一种矩形、隧道的技术,应用在隧道、土方钻采、采矿设备等方向,能够解决背土现象产生、周围土层扰动、影响周围环境等问题,达到解决背土问题的效果
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[0019] Below in conjunction with accompanying drawing, specific embodiment of the present invention is described in further detail:
[0020] A drag-reducing measure for thin-covered soil back soil for rectangular tunnels, comprising the following steps:
[0021] The first step: the direction of excavation of the rectangular tunnel is filled with water;
[0022] The second step: Drilling and injecting water in the excavation direction of the rectangular tunnel;
[0023] Step 3: The excavation direction of the rectangular tunnel is downward to prefabricate the concrete retaining block;
[0024] The fourth step: interval grouting.
[0025] Among them, the water injection loading of oil drums is specifically: place 18 water-filled oil drums within 4 meters in front of the pipe jacking machine. The volume of each oil drum is 200L and the total weight is 3.6t. The purpose is ground loading.
[0026] Among them, the water injection of the hole is specifically as follows: the surve...
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