Anti-skid tunnel structure and construction method thereof

Abstract

The invention relates to an anti-skid tunnel structure and a construction method thereof. The anti-skid tunnel structure comprises a tunnel structure passing through a slip mass, wherein multiple upper connecting beams and lower connecting beams are respectively arranged on an arch apex and an inverted arch of the tunnel structure; multiple upper-side anti-skid piles and lower-side anti-skid pilesare respectively arranged on two sides of the tunnel structure; and the upper connecting beams and the lower connecting beams are fixedly connected with the upper-side anti-skid piles and the lower-side anti-skid piles. The construction method comprises the steps of (1) excavating a pile well at a pile position of a predetermined anti-skid pile, and constructing an anti-skid pile retaining wall;(2) pouring concrete on the anti-skid pile to the design height; (3) excavating a tunnel and constructing preliminary bracing; (4) implanting first connecting reinforcement steel bars onto the anti-skid piles, binding connecting beam reinforcement steel bars on the first connecting reinforcement steel bars, binding secondary lining inner reinforcement steel bars, arranging second connecting reinforcement steel bars along a trend direction of the tunnel structure, and connecting the connecting beam reinforcement steel bars and the secondary lining inner reinforcement steel bars through the second connecting reinforcement steel bars; and (5) pouring a secondary lining, the upper connecting beams and the lower connecting beams through a vertical formwork.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to an anti-sliding tunnel structure and a construction method thereof. Background technique [0002] The direction of the tunnel intersects with the main axis of the landslide at a large angle. Specifically, it means that the angle between the direction of the tunnel and the main axis of the landslide is greater than 45°, and when the tunnel structure crosses the landslide surface, the landslide will generate a large thrust on the side wall of the tunnel. There is a lot of pressure on the top of the tunnel, and the tunnel project faces double safety risks in construction and operation. During the construction process, on the one hand, the nature of the rock and soil in the landslide area is poor, and problems such as landslides, roof fall, and initial support deformation exceeding the limit are prone to occur during tunnel excavation, making construction difficult; on the...

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Problems solved by technology

[0005] The purpose of the present invention is: for the existing tunnel engineering in the prior art when the landslide section is constructed, the tunnel direction intersects with the main axis direction of the landslide at a large angle. Thrust or pressure, so it is necessary to use anti-slide piles with larger cross-sections and larger buried depths, but such projects require large investment and difficult construction. To provide an anti-slide tunnel structure and its construction method

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