Multi-arch tunnel integral supporting structure and rapid construction method thereof

Abstract

According to the integral supporting structure of the multi-arch tunnel and the rapid construction method of the integral supporting structure, a main hole is directly excavated in a segmented mode, combined supporting is arranged, the disturbance frequency is reduced, and the stability of the tunnel and surrounding rock is improved. Primary supports and waterproof structures can be independently constructed, adjacent cavern primary supports are supported in a connected mode, the deformation control effect is good, and the waterproof effect is good. Compared with a conventional construction method, the technology is less in temporary support and simple in process; the support construction is simple, and the quality is good; excavation and support construction of the left and right caverns can be separated in a left and right cavern staggered distance mode and a middle partition wall, cross operation can be effectively avoided, and the engineering quality is guaranteed. According to the technology, the problems existing in a traditional construction method can be effectively solved, the construction requirements of double-multiple-arch tunnels or even multiple-multiple-arch tunnels in China are met, and the application prospect is wide.

Description

technical field [0001] The invention is applied in the field of tunnel engineering, and in particular relates to an integral support structure for a multi-arch tunnel and a rapid construction method thereof. Background technique [0002] Multi-arch tunnel has become an important structural form in tunnel engineering. Based on the structural characteristics of the multi-arch tunnel, its construction method and support technology are quite different from the conventional split tunnel, and in most cases, its construction is more difficult and more expensive. At present, most multi-arch tunnels are constructed using the middle tunnel method combined with the CD construction method, CRD construction method or double-side-wall pilot pit construction method. This method converts large sections into small section construction, supports while excavating, and has a good control effect on surrounding rock deformation. , but there are disadvantages such as many construction procedures,...

AI Technical Summary

Problems solved by technology

However, the tunnel is in the form of a multi-arch structure with a large span, complex construction technology, numerous procedures, and large process interference. The quality of the construction technology directly affects the quality and cost of the entire project.

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