A kind of asymmetric support method for soft rock tunnel side wall
An asymmetric, side wall technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems such as relying on construction experience, rare disaster research, and unsatisfactory control effects, etc. Pull-slip shear failure problem, low construction cost, stable support effect
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[0043] Such as figure 1 An asymmetric support method for the side wall of a soft rock tunnel is shown. The soft rock tunnel 1 is excavated and the tunnel side wall is supported in multiple segments along the longitudinal extension direction of the tunnel from the back to the front. The excavation and tunnel side wall support construction methods of the above sections are all the same; the soft rock tunnel 1 is a deep buried tunnel, and the buried depth of the soft rock tunnel 1 is H≥2B, where B is the opening of the soft rock tunnel 1. Excavation width, the units of H and B are m; for any segment excavation and tunnel side wall support construction, the following steps are included:
[0044] Step 1. Determination of the basic mechanical parameters of the surrounding rock: through indoor tests on the rock samples taken from the site, the basic mechanical parameters of the surrounding rock in the current construction section are tested, and the test results are recorded synchro...
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