Novel bridge spanning structure between mountainous area tunnels and construction method thereof

Abstract

The invention is suitable for the field of bridge engineering, and provides a novel bridge spanning structure between mountainous area tunnels and a construction method. The bridge spanning structurecomprises a bridge girder, abutment wing walls, a buffer layer and a cement macadam stable filling body. And the bridge girder is fixedly connected with the tops of the abutment wing walls to form a portal rigid frame. According to the bridge spanning structure, the economical efficiency and durability of the whole life cycle of the bridge structure are improved by adopting a portal rigid frame bridge mode. Meanwhile, the structure achieves the hidden drainage function, prevents water from flowing back into the tunnel, and improves the driving safety. Meanwhile, according to the construction method, disturbance to a tunnel mountain is small in the construction period, the influence on driving safety of an existing road spanning the bridge is small, the construction period is short, and efficiency is high.

Description

technical field [0001] The invention belongs to the field of bridge engineering, and in particular relates to a novel bridge spanning structure between tunnels in mountainous areas and a construction method thereof. Background technique [0002] Due to the complex terrain of mountainous roads, it is often necessary to cross the existing road at the lower part between the exits of two tunnels that are close to each other. When the span is small, considering factors such as economy and applicability, bridges or channel culverts are usually used. , The traditional construction methods include cast-in-place, prefabricated hoisting, etc. However, the traditional construction methods have a series of problems such as large disturbance to the tunnel mountain, great impact on existing road traffic, poor structural durability, and high maintenance costs. In order to reduce the disturbance to the tunnel mountain and the impact on the traffic of existing roads, improve the durability o...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a new type of bridge spanning structure between tunnels in mountainous areas and its construction method, aiming at solving the problem that the traditional spanning method in the prior art has a large disturbance to the tunnel mountain, a great impact on the passage of existing roads, and a high durability. Poor, poor economy of life cycle management

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