Acid-soluble borehole drainage structure and construction method for karst or faulted tunnels and slopes
A drainage structure and fault technology, which is applied in the direction of infrastructure engineering, tunnels, drainage, etc., can solve the problem of not being able to isolate the grout, and achieve a high filling rate
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[0042] The present invention is further described below.
[0043] The drainage structure of acid-soluble borehole 3 for karst or faulted tunnels and slopes disclosed by the present invention includes a hollow section 32 and a grouting section 31, and the hollow section 32 is located at the lower part of the downdipping borehole 3. The grouting section 31 is located at the upper part of the borehole 3, and a water-stop member 5 is arranged between the permeable section 32 and the grouting section 31. The permeable pipe 4 is arranged in the permeable section 32, and the permeable pipe 4 There is a cavity, and the permeable pipe 4 is provided with a drain pipe 6 extending outward through the water-stop member 5, and the permeable pipe 4 is filled with an acid-soluble and water-insoluble solid filling material 8, so The lower part of the water-stop member 5, the permeable pipe 4 and the drain pipe 6 are all acid-resistant materials or have an acid-resistant surface layer to preven...
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