12-03
(1) advanced support of pipe shed.(2) Surface anchor or surface grouting reinforcement.(3) freezing consolidation of strata.(4) Method of lowering groundwater level.
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12-10
1, small rotation inertia, light weight.2, strong corrosion resistance.3, excellent wear resistance.4. The structure is very reasonable.
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The use of concrete accelerator
2022-12-101. Concrete accelerator is a kind of surface active material, added to concrete, cement particles play a diffusion effect…What should we pay attention to when constructing powder accelerator?
2022-12-101. Raw materials: Quality shall meet JC476-1998 standards, cement shall be qualified and unexpired Grade 32.5 (original 4…What are the commonly used support and reinforcement technical measures outside the dug tunnel
2022-12-10Shoting-anchor excavation method refers to the construction method of tunnel construction by excavation of underground tu…
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