Underdrain-type tunnel after-lining drainage repairing system and construction method thereof

Abstract

The invention discloses an underdrain-type tunnel after-lining drainage repairing system and a construction method thereof, and belongs to the technical field of tunnel water proofing and drainage. The underdrain-type tunnel after-lining drainage repairing system comprises a half-section pipe annularly arranged at a water leakage seam in a secondary lining; the opening side of the half-section pipe is fixedly attached to a primary support through a clamping hoop with an expansion bolt; a notch is dug in the side, deviating from the opening side of the half-section pipe, of the secondary lining; the notch is filled with high-strength polymer waterproofing mortar; a flexible water permeable pipe or an earthwork blind ditch is formed in the half-section pipe in a penetrating mode; the two ends of the half-section pipe are led to an edge ditch or a center ditch; and the position between the flexible water permeable pipe and the half-section pipe or between the earthwork blind ditch and thehalf-section pipe is filled with water permeable fillers. Aiming at the situations of cracking, water seepage and the like in the operation process of a tunnel, water after lining is effectively drained, the influence of water seepage on operation of the tunnel is avoided, and the service life of the tunnel is prolonged.

Description

technical field [0001] The invention belongs to the technical field of tunnel waterproofing and drainage, and in particular relates to a drainage repair system and a construction method for a hidden ditch tunnel lining. Background technique [0002] In recent years, with the rapid growth of the national economy, the construction of my country's transportation infrastructure has also developed rapidly. Among them, tunnel construction has become an indispensable part of road network construction in our country, especially in the construction of mountainous roads. Due to the limitation of terrain conditions, the route design scheme of building tunnels to shorten the road mileage on the basis of meeting the needs of vehicles has been widely adopted. promotion and application. [0003] However, various diseases appeared during the construction and operation of the tunnel, which greatly shortened the service life of the tunnel, and the tunnel diseases seriously threatened the saf...

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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a drainage repair system and construction method for underground tunnel lining, which can effectively lead out the water behind the lining when cracking and water seepage occur during the operation of the tunnel, so as to solve the impact of water seepage on the tunnel. operational impact and increase tunnel service life

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