Waterproofing and drainage system for tunnel-type anchorage of suspension bridge, and construction method

Abstract

The invention discloses a waterproofing and drainage system for a tunnel-type anchorage of a suspension bridge, and a construction method, belonging to the technical field of building construction. The construction method comprises grouting surrounding rocks to seal water, arranging annular, longitudinal and transverse water-percolating blind pipes on the periphery of the tunnel to divert water, hanging waterproof plates on the periphery of the tunnel to proof water, arranging water-collecting wells at the bottoms of a front anchorage chamber and a rear anchorage chamber to collect water, and arranging a transverse drainage channel at the bottom of the tunnel to discharge water. According to the waterproofing and drainage system for the tunnel-type anchorage of the suspension bridge, and the construction method, on the one hand, the stability of surrounding rocks around the tunnel-type anchorage is protected, and the project quality of the main body is protected, so that the bridge safety is enhanced; on the other hand, the drainage work of a water pump in the operation period is cancelled, the drainage cost of the tunnel-type anchorage in the operation period of the bridge is greatly reduced; and the transverse drainage channel of the tunnel-type anchorage is formed by horizontal drilling of a drilling machine, the method is simple, the use is flexible, the construction period is short, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a suspension bridge tunnel anchor waterproofing and drainage system and a construction method. Background technique [0002] In the anchor waterproofing and drainage construction of the suspension bridge tunnel, because the tunnel anchor is an inclined downward structure, the accumulated water in the cave is collected in the water collection well of the rear anchor chamber, but it is often limited by the nearby terrain and the water level of the river, and the accumulated water cannot be directly discharged from the rear anchor chamber. discharge. In this case, the accumulated water in the tunnel anchor hole is generally installed with a water pump in the water collection well of the rear anchor chamber, and then pumped out of the hole through the water pump. [0003] The concrete volume of the tunnel anchor plug body is relatively large, with many laye...

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Problems solved by technology

[0003] The concrete volume of the tunnel anchor plug body is relatively large, with many layers, and the layered interface is relatively weak. Groundwater often seeps out from the layered interface in the pedestrian passage; the tunnel anchor is generally deep, and the water pump used for pumping and drainage The head is high, the weight is heavy, and the installation is difficult; during the operation period, the tunnel anchor needs to arrange special personnel to take care of the pumping situation, and the water pump needs to be maintained frequently, and the cost of pumping and drainage during the operation period is huge

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