Waterproof method for construction joints of underground excavation section of open-cut station

Abstract

The invention discloses a waterproof method for construction joints of an underground excavation section of an open-cut station. The waterproof method comprises the steps that the concrete construction joints of section pouring are divided into longitudinal construction joints and circumferential construction joints, and the two types of construction joints both adopt a rubber water-stop belt method and pre-embedded grouting pipes method to strengthen the waterproof treatment; when first-level fortification is required, the circumferential construction joints all adopt medium-embedded steel-edge rubber water-stop belts, and the joint surfaces are coated with cement-based permeable crystalline materials for waterproof treatment; the horizontal and longitudinal construction joints all adoptthe steel-edge rubber water-stop belts and water-swelling water-stop glue for waterproof treatment; construction joints at connecting openings with an auxiliary structure adopt double-channel water-swelling water-stop glue and the pre-embedded grouting pipes for waterproof treatment; when second-level fortification is required, the circumferential construction joints adopt the steel edge rubber water-stop belts for waterproof treatment; the horizontal and longitudinal construction joints all adopt the steel-edge rubber water-stop belts and the water-swelling water-stop glue for waterproof treatment; and station floor construction joints adopt the water-swelling water-stop glue or bentonite expansion water-stop strips for waterproof treatment.

Description

technical field [0001] The invention relates to the technical field of waterproof construction of subway stations, more specifically, it relates to a method for waterproofing construction joints of underground excavation sections of open-cut stations. Background technique [0002] With the development of transportation and people's demand for high-speed, fast and safe means of transportation, high-speed railways and expressways have become the preferred means of transportation for people to travel. Due to the large radius of curve selection of high-speed railways and highways and the constraints of terrain conditions, more and more railway tunnels and highway tunnels will be constructed. Water leakage has always been one of the main factors affecting the safety of tunnel operation, and water leakage in construction joints is the main part of the tunnel where water leakage occurs. Leakage in railway tunnels will affect the safety of the catenary in the arch, which will affec...

AI Technical Summary

Problems solved by technology

Water leakage in railway tunnels will affect the safety of the catenary in the arch, which in turn will affect the safety of train operation; water leakage in highway tunnels will affect the safety of driving, lighting and ventilation systems in the tunnel.

With the construction of high-speed railways and expressways, water seepage in tunnels will have a greater impact on driving safety, and safety risks will further increase

[0003] The current underground excavation section of the open-cut station has relatively weak waterproof measures in the waterproof structure, which is prone to water leakage. At the same time, the existing waterproof measures are mainly for prevention, that is, passively block the pressurized groundwater in the open-cut Outside the side wall of the underground excavation section of the station, but the open-excavation station is a long-term century-old project, and it is subjected to water pressure for a long time, and water leakage will inevitably occur

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