Integrated structural system penetrating through giant karst cave and construction method of integrated structural system

Abstract

The invention discloses an integrated structural system penetrating through a giant karst cave and a construction method of the integrated structural system. The integrated structural system comprisesa top reinforcing structure, a base reinforcing structure, a guarding structure, a bridge structure and a light steel shed tunnel structure; the top reinforcing structure is used for reinforcing thetop of a karst cave hall; the base reinforcing structure is used for reinforcing an excavation base of a waste slag backfilling body of the karst cave hall; the guarding structure is arranged on the waste slag backfilling body and connected to the top of the karst cave hall, and vertical grouting channels are formed in the bottom of the guarding structure at intervals in the line direction, and extend into the waste slag backfilling body where the base reinforcing structure is located; the bridge structure is arranged with the range between the guarding structure and the rock wall of the top of the karst cave hall and is a train and track bed load bearing structure; and the two ends of the bottom of the light steel shed tunnel structure are supported on the bridge structure. All the structures are clearly stressed, loads are transmitted separately, uneven settlement of the structures is avoided, and the safety during operation is guaranteed.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to an integrated structural system passing through giant karst caves and a construction method thereof. Background technique [0002] In order to meet the sustained and rapid development of the national economy, there is an urgent need for large-scale development of transportation infrastructure. At the same time, my country is one of the countries with the widest distribution of karst in the world. With the large-scale construction of transportation infrastructure, a large number of tunnel projects passing through various types of karst caves will inevitably appear. [0003] At present, when highways and railways pass through karst caves, most of them use mortar rubble or concrete backfill, pile rafts or bridge structures to span. The above-mentioned construction schemes are all proposed based on small and medium karst caves. However, when passing through giant karst caves with...

AI Technical Summary

Problems solved by technology

However, when passing through giant karst caves with huge cavities, extremely poor wall stability, and extremely high heights and spans, the traditional backfilling scheme is adopted. Regardless of whether mortar rubble or concrete backfilling is used, the amount of backfilling will be huge and the cost will be too high; if Simple use of waste slag backfill, due to the backfill depth of tens of meters or even hundreds of meters, will inevitably produce large post-construction settlements, resulting in uneven stress on the tunnel structure, cracking and damage, etc., seriously affecting the safety of tunnel engineering operations; The bridge structure is used to span, and the rockfall on the top of the cave will pose a huge threat to the bridge structure and train operation

Obviously, traditional solutions cannot effectively solve the construction and operation safety problems of tunnels passing through giant karst caves

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