Open cavity lining structure of high-backfill tunnel in high-intensity expansive soil area

Abstract

The invention discloses an open cut tunnel lining structure of a high backfill tunnel in a high intensity expansive soil area. The structure comprises a first lining and side slopes arranged on two sides of the first lining A second lining is arranged on the inner side of the first lining, a plurality of illuminating lamps are mounted on the inner walls at two ends of the second lining, water absorbing mechanisms are arranged between the first lining and the side slops on two sides, the water outlets of the water absorbing mechanisms are located between the first lining and the second linings,a plurality of first elastic mechanisms are fixedly connected between the second linings and the first lining, grooves are formed in the bottoms of inlets in two ends of the second linings, reducingplates are slidably and hermetically arranged at the openings of the grooves, a plurality of second elastic mechanisms are fixedly connected between the reducing plates and the bottoms of the grooves,and driving mechanisms are arranged in the grooves. The structure not only can improve the structural safety of the linings when the tunnel is used effectively, but also can remove dust of the illuminating lamps to ensure the illuminating effect, so that it is favorable to improve the safety of passing vehicles psssing through the tunnel.

Description

technical field [0001] The invention relates to the technical field of tunnels, in particular to the open cavity lining structure of high-backfill tunnels in high-intensity expansive soil areas. Background technique [0002] With the development of tunnel and underground engineering construction technology, tunnel engineering is widely used in transportation industries such as railways and highways. The use of tunnel engineering can save land and shorten the length of the line, but the engineering risk of the tunnel is also relatively high, especially when passing through the expansive soil layer in the high-intensity earthquake area, the soil is loose due to repeated earthquake forces. Its self-stabilizing ability is extremely poor, which poses a great challenge to the safe construction of the tunnel. [0003] At present, for tunnels located in expansive soil areas, due to the characteristics of expansive soils such as water absorption and expansion, dehydration shrinkage,...

AI Technical Summary

Problems solved by technology

The use of tunnel engineering can save land and shorten the length of the line, but the engineering risk of the tunnel is also relatively high, especially when passing through the expansive soil layer in the high-intensity earthquake area, the soil is loose due to repeated earthquake forces. Its self-stabilization ability is extremely poor, which poses a great challenge to the safe construction of the tunnel

[0003] At present, for tunnels located in expansive soil areas, due to the characteristics of expansive soils such as water absorption and expansion, dehydration shrinkage, repeated expansion and contraction deformation, water soaking bearing capacity attenuation, and development of drying shrinkage cracks, the properties are extremely unstable, making tunnels in expansive soil areas When in use, it is greatly affected by the change of water absorption and expansion of expansive soil, which affects the safety of the tunnel lining structure. In addition, when the tunnel is used, the lighting at the entrance plays an important role when the vehicle enters and exits the tunnel, while the existing entrance The lighting does not have the function of dust removal

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