Advanced support structure applicable to unconsolidated formation and construction method thereof

Abstract

The invention discloses an advanced support structure applicable to an unconsolidated formation and a construction method thereof. The advanced support structure comprises a steel corrugated plate andI-steel frames; the steel corrugated plate is beaten into weak surrounding rocks of a tunnel by a pushing machine to form an advanced support, and a reinforcement range of the advanced support is theposition of a tunnel vault; and the I-steel frames are erected below the steel corrugated plate after the tunnel is excavated by a section of distance. According to the invention, the steel corrugated plate is adopted above the vault to carry out advanced supporting, so that a supporting area can be effectively increased, and loading capacity is improved; the pushing machine is adopted to carry out construction, so that the steel corrugated plate can be rapidly and effectively beaten into a designed depth, a design angle is effectively regulated, and construction quality is improved; and effects of the advanced support in the tunnel excavating process are reinforced, the surrounding rocks are further reinforced, integrity and stability of the advanced support are reinforced, the advancedsupport structure not only can take an effect of carrying out transfer and regulation on an excavation release load, but also can bear the load in a case of improving rigidity of a corrugated steel pipe, and safety in the tunnel excavating process is improved.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to an advanced support structure suitable for loose strata and a construction method thereof. Background technique [0002] In recent years, with the development of road engineering and the improvement of design and construction technology, tunnel engineering has been more and more widely used. When the geological, hydrological and climatic conditions of the tunnel are very complex, the tunnel is prone to collapse due to the instability of surrounding rock and surface settlement. In fact, it is very difficult to organize the excavation of the tunnel, so the construction will be very difficult. Therefore, pre-support is an economical and practical auxiliary tunnel construction method, which plays an important role in the excavation of shallow buried tunnels. The pre-support technology has many advantages such as strengthening the surrounding rock, improving the grade and...

AI Technical Summary

Problems solved by technology

In the past, the advanced support method of the tunnel basically adopted the method of advanced large pipe shed and small pipe, but there were more or less shortcomings in the aspect of the integrity of the force

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