Landslide section tunnel reinforcing device and reinforcing construction method

Abstract

The invention aims at solving the problems existing in an existing landslide section tunnel reinforcing technology and discloses a landslide section tunnel reinforcing device and a reinforcing construction method. The landslide section tunnel reinforcing device comprises multiple pre-reinforcement piles, crown beams, preliminary bracing steel arch frames and pre-stressed tension devices. The pre-reinforcement piles are arranged at the arch springing positions on two sides of a landslide section tunnel. The crown beams are arranged at the tops of all pre-reinforcement piles on the same side of the landslide section tunnel. The preliminary bracing steel arch frames are arranged on the crown beams on two sides of the landslide section tunnel. One end of each pre-stressed tension device is arranged in a rock body where the landslide section tunnel is located, and the other end of each pre-stressed tension device is connected with the corresponding preliminary bracing steel arch frame. Pre-stressed anchor cables are parallel to the inclination direction of the rock body where the landslide section tunnel is located. The landslide section tunnel reinforcing device is reasonable in structural design, good in mechanical property, good in operability and low in construction cost, and the reinforcing construction method is simple in steps.

Description

technical field [0001] The invention belongs to the technical field of prevention and control of geological disasters in tunnel engineering, and relates to a tunnel reinforcement device and a reinforcement construction method in a landslide section. Background technique [0002] In recent years, with the continuous development of my country's traffic construction, there are more and more expressway tunnels. Due to the limitation of terrain conditions, it is inevitable to pass through special strata such as landslides and weak fracture zones. As one of the most important geological disasters, landslide has the characteristics of diversity, complexity, and great harm, and has always been a hot issue in engineering research. [0003] The tunnel construction in the landslide section has a great impact on the landslide body itself, which is embodied in the following aspects: First, during the excavation process, the stress field and displacement field in the landslide body are ea...

AI Technical Summary

Problems solved by technology

Among them, the most commonly used support measures are mainly anti-slide pile support, which uses anti-slide piles to form a safety island in the landslide, so that the tunnel is located in the isolated area and is not affected by the landslide; however, this scheme is only carried out on the landslide outside the tunnel. Reinforcement treatment is a passive method. For deep large-scale landslides, especially landslides with harsh geological conditions and large landslide thrust, the reinforcement effect is not ideal, the mechanical properties are unstable, and the constructi

Images