Method for preventing tunnel freezing damage of seasonally frozen regions
A prevention method and technology in permafrost areas, which can be used in tunnels, tunnel linings, and earth-moving drilling and mining. problems, to achieve the effect of economical saving, fast construction, and widespread application prospects
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[0009] The present invention also provides the implementation steps of the method for water stop and freeze prevention of tunnels in seasonal frozen soil areas, as follows.
[0010] (1) After the tunnel is excavated, a lining shall be implemented in time in accordance with the design requirements to control the deformation and destruction of the surrounding rock.
[0011] (2) Outside of a lining, a mold for filling the quicklime layer is supported (the net width is 20cm-30cm, which is the thickness of the quicklime layer).
[0012] (3) Fill the quicklime layer by layer into the mold of the quicklime layer. Filling requirements: The virtual thickness of each layer of quicklime is 30cm-35cm, and it is compacted to a thickness of 18cm-23cm.
[0013] (4) After filling the quicklime layer, properly remove the formwork. Mould removal requirements: be careful to avoid damaging the quicklime layer.
[0014] (5) Spread a layer of waterproof board outside the quicklime layer.
[0015] (6) Paste ...
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