Treatment and construction technology of a tunnel passing through a super-large water-filled cavity karst cave

Abstract

The invention discloses a treatment and construction process for a tunnel crossing an extra-large karst cave with a water cavity, comprising steps: 1: protecting the top of the karst cave; Construction of the retaining wall at the water outlet; Fifth: construction of the bottom plate of the cave; Monitoring; 10: Rolling and preloading after subgrade backfilling; 11: Initial support construction of the cave roof; 12: Reinforced concrete strip foundation construction; 13: Open cave lining, between the top of the cave and the outside of the lining Fill lightweight foam concrete buffer layer; Fourteen: Settlement monitoring of backfill body. The invention can systematically solve the technical problems of complex construction techniques, long construction time, large disturbance to surrounding rock construction, cross construction, and monitoring and measurement of existing tunnels passing through extra-large karst caves.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a treatment and construction process for a tunnel passing through an extra-large karst cave with a water cavity. Background technique [0002] When the tunnel passes through the karst area, it may encounter large karst caves, underground rivers or pipeline flows. Such geology has a certain impact on the overall stability of the surrounding rock and stress distribution and release. The engineering method with small disturbance to the surrounding rock structure of the karst cave and fast construction is particularly important. [0003] By reviewing relevant literature and patents, it is found that during the excavation of long tunnels, it is rare to directly pass through super-large water-cavity caves with a span of 34 meters and a depth of more than 38 meters, and the cave roof is higher than the tunnel roof. Some methods for the treatment of tunnels passi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-cost, environmentally-friendly and safe treatment and construction process for tunnels passing through super-large water-filled caverns, which avoids the construction scene of large-scale machinery in the tunnel, and can systematically solve the construction of existing tunnels crossing super-large caves Technical problems such as complex process, long construction time, large disturbance to surrounding rock construction, cross-construction, monitoring and measurement

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