Water-proof construction method for connecting joint of secondary lining in tunnel
A construction method and joint joint technology, applied in tunnel lining, tunnel, drainage, etc., can solve the problems of water leakage, water leakage, damage and other problems in the joint joint of the secondary lining, and achieve the prevention of water seepage of the secondary lining, low cost and simple construction Effect
Active Publication Date: 2021-06-11
CCCC SECOND HARBOR ENG +1
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Problems solved by technology
[0004] The purpose of the present invention is to solve the above-mentioned defects in the prior art, in order to effectively solve the problem that infiltration water infiltrates from the position of the damaged waterproof board to the buried water stop belt in the damaged place and the phenomenon of water leakage occurs, and that the infiltration water seeps into the surrounding two For the problem of water seepage in the joints of the lining, it is necessary to design a method to prevent the infiltration of water from seeping out from the joints of the second lining, and cooperate with the circular drainage blind pipe to achieve the effect of blockage and drainage and comprehensive water control
Method used
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Embodiment 1
[0030] Such as figure 1 Shown, a kind of anti-seepage construction method of the second liner connecting joint 11 in the tunnel, comprises the following steps:
[0031] Step 1: After the excavation of the surrounding rock 1 of the tunnel, carry out the initial support construction. After the construction of the primary support 2 is completed and before the concrete pouring of the secondary lining, the surface of the primary support 2 is first leveled. The drainage blind pipe is pre-buried between the primary support 2 concrete, and the geotextile is hung, and then the first form and the second lining waterproof board 3 are laid in the circumferential direction at the position of the end formwork on the surface of the initial support 2, and the second form is reserved during laying. The overlapping length of the second lining waterproof board 13 is ≥100mm.
[0032] Step 2: Carry out a circular repair welding of the waterproof board at the overlapping position of the first mold...
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The invention discloses a water-proof construction method for the connection joint of the second lining in the tunnel, which comprises the following steps: step 1, laying the waterproof board of the first mold and the second lining in the circumferential direction at the position of the end formwork on the surface of the primary support; step 2, Carry out a repair welding of the circumferential waterproof plate at the overlapping position of the first mold second liner waterproof plate and the second mold second liner waterproof plate; Step 3, Fold the free end of the third layer circumferential waterproof plate, fold The rear free end is barb-shaped and embedded in the second-lined concrete. The invention can effectively solve the problem that infiltration water infiltrates from the position of the damaged waterproof board to the damaged buried water stop and causes leakage, and the problem that infiltration water infiltrates to the joints of the surrounding two linings causes leakage.
Description
technical field [0001] The invention relates to an anti-seepage construction method for a joint of two linings in a tunnel. More specifically, the present invention relates to a waterproofing method for construction of a waterproof board at the joint position of two linings. Background technique [0002] After the completion of tunnel construction, water leakage is not uncommon, especially in tunnels with rich water, broken surrounding rocks, and long operating hours. Aiming at the phenomenon of water seepage during the operation of the tunnel, various experts and scholars have concluded that the main reasons are as follows: the waterproof board is torn or punctured, the impermeability level of the secondary lining concrete is not enough, the construction quality of the secondary lining concrete is not up to standard, waterproof The slabs are not laid and constructed according to the specifications, etc. [0003] In view of the tunnel water leakage situation, the following...
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IPC IPC(8): E21D11/38E21F16/02
CPCE21D11/38E21D11/383E21D11/385E21F16/02
Inventor 陈培帅唐湘隆江鸿何志军刘鑫袁远周勇幸原野许波李艾马浩杰
Owner CCCC SECOND HARBOR ENG