Loess tunnel supporting system and installation method thereof

A technology for loess tunnels and installation methods, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems that the support strength cannot be quickly provided, and the support strength of loess tunnels is insufficient, so as to facilitate maintenance and improve support rigidity , the effect of easy installation

Pending Publication Date: 2019-09-20
CHANGAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a loess tunnel support system and its installation method, which solv...

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  • Loess tunnel supporting system and installation method thereof
  • Loess tunnel supporting system and installation method thereof
  • Loess tunnel supporting system and installation method thereof

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Embodiment Construction

[0047] The present invention will be further described in detail below in conjunction with specific embodiments, which are for explanation rather than limitation of the present invention.

[0048] Such as figure 1 As shown, a loess tunnel support system of the present invention includes three parts: a composite structure arch, a tube concrete 1 and a molded concrete 2. The composite structure arch is prefabricated by a wing plate 3 and a hollow tube 4. The hollow tube 4 Installed on the inner side of the wing plate 3, the hollow tube 4 is filled with in-tube concrete 1 and the adjacent composite structure arches are filled with moulded concrete 2.

[0049] Such as figure 2 As shown, the combined structure arch frame is divided into vault support 1-1, arch lumbar support 1-2, arch foot support 1-3 and arch bottom support 1-4, vault support 1-1 and arch bottom support 1-4 Relatively arranged, the arch lumbar supports 1-2 are symmetrically arranged at both ends of the arch support 1-...

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Abstract

The invention discloses a loess tunnel supporting system and an installation method thereof. The loess tunnel supporting system comprises a plurality of composite structure arches tightly distributed, each composite structure arch comprises a flange and a hollow pipe, the hollow pipe is installed on the inner side of the flange, and in-pipe concrete is poured into the hollow pipe; model-building concrete is poured between every two adjacent composite structure arches; and the composite structure arches are divided into arch top brackets, arch waist brackets, arch foot brackets and arch bottom brackets in the circumferential direction, the brackets are connected in a socket and spigot joint mode, and connection is compact and no gap exists. The composite structure arches, the in-pipe concrete and the model-building concrete act jointly, and the carrying capacity of tunnel preliminary support is improved. The loess tunnel supporting system combines the advantages of steel materials and the concrete and can effectively enable the steel materials and the concrete to be integrated, a composite structure with higher rigidity and high strength is formed, due to the fact that the concrete is wrapped with the steel materials, the concrete is in a triaxial compressive state, and development of the strength is more facilitated.

Description

Technical field [0001] The invention belongs to the technical field of tunnel support structures, and particularly relates to a loess tunnel support system and an installation method thereof. Background technique [0002] The commonly used initial support structures for loess tunnels at this stage are steel arches and shotcrete. However, there are still problems that the support strength is insufficient and the support strength cannot be provided quickly. Therefore, in many loess tunnels in China, the arches are twisted and broken, the sprayed concrete cracks, the surface collapses, and the cave collapses. [0003] This problem is mainly reflected in: (1) Design reasons. The depth of the boundary between deep and shallow burial is unclear; the load distribution ratio of the primary support and the secondary lining is difficult to determine; (2) the reasons for the construction. The construction is complicated and the process is numerous. The processes of excavation, erection, and...

Claims

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Application Information

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IPC IPC(8): E21D11/18E21D11/10
CPCE21D11/107E21D11/18E21D11/183
Inventor 谢永利王志超来弘鹏张梦泽
Owner CHANGAN UNIV
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