Surrounding rock pressure-frost heaving force monitoring system and installation method of tunnel in cold region
A technology of surrounding rock pressure and tunnels in cold regions, which is applied to mining equipment, earthwork drilling, mining equipment, etc., can solve problems such as ignorance and difficulty of instrument technicians, and difficulty in on-site testing, so as to avoid the influence of human factors , The data processing is concise and clear, and the test data is comprehensive and rich
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[0053] Step 1: Six measuring points are designed for the tunnel, which are numbered 1-6 from the vault down. According to the number of measuring points, the number of earth pressure cells 4 to be used is twelve, steel bar meter 6, and thermometer 9. Its numbers are Y1-Y12, G1-G6, W1-W6 for standby;
[0054] Step 2: Excavate the tunnel to the design contour line, excavate the space suitable for the earth pressure box 4 of the first layer at the position of the design measuring point on the surrounding rock 1, and then use the cross bracket 8 to place the earth pressure box 4 according to the corresponding number 1- 6 fixed so that it is in close contact;
[0055] Step 3: Bind the thermometer 9 with the same number on the cross bracket 8 at the same measuring point, and after the six measuring points are installed in sequence, use the method of pre-sprayed concrete to further fix;
[0056] Step 4: Carry out the erection work of the steel arch 3. After the erection of the steel...
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