Continuous beam bridge suitable for tunnel to pass through huge karst cave and construction technical method thereof

Abstract

The invention relates to a continuous beam bridge suitable for a tunnel to pass through a huge karst cave and a construction technical method thereof, and belongs to the field of karst area tunnel engineering. The upper structure of the continuous beam bridge comprises a support (basin-type rubber support), a beam plate (cast-in-place beam plate), a bridge deck structure (a bridge deck pavement layer, a waterproof layer, an expansion joint and the like) and bridge deck accessory structures (crash barriers, isolation piers, sound insulation screens and the like). The lower structure comprises piers (light piers), a bridge abutment (light bridge abutment), a foundation (steel pipe pile foundation) and a bearing platform (high pile bearing platform). The miniature steel pipe pile combined pier foundation is used, the steel pipe piles are simple in structure and convenient to construct, the construction amount and the construction time can be greatly reduced, and the continuous beam bridge is more economical and safer. By means of the construction method, the problems that a traditional karst cave disposal method is improper, the cost is high, and hidden danger is caused to the tunnel structure and operation safety are solved, and reference experience is conveniently provided for later giant karst cave construction.

Description

technical field [0001] The invention belongs to the field of tunnel engineering in karst areas, and in particular relates to a continuous beam bridge construction technology suitable for tunnels passing through giant karst caves. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] As the national economic development continues to increase the demand for high-speed rail construction, there will be more and more tunnel projects passing through the karst formations in mountainous areas. Especially the high-speed rail tunnels built in Southwest China have revealed many giant karst caves. The volume of such karst caves Huge, with a space of millions of cubic meters, the constructi...

AI Technical Summary

Problems solved by technology

There have been individual construction cases for anhydrous giant dry karst caves. For giant karst caves with underground rivers passing through, the original groundwater drainage channels should be kept as much as possible when the tunnel passes through. If the karst caves are backfilled, the karst pipelines may be blocked and eventually new ones will be formed. Flooding will cause hidden dangers to the tunnel structure and operation safety

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