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Long-span high-backfill open cut tunnel structure

A large-span, open-hole technology, used in shaft equipment, shaft lining, mining equipment, etc., can solve the problems of unguaranteed durability of open-hole lining, waste of masonry, etc., to reduce heat of hydration and harmful cracks, reduce Cost, effect of reducing thickness

Inactive Publication Date: 2013-06-12
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the lining thickness is increased blindly, it will not only cause a lot of masonry waste, but also cause more temperature cracks due to the inability to effectively eliminate the hydration heat of large-volume concrete, resulting in that the durability of the open-hole lining cannot be guaranteed

Method used

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  • Long-span high-backfill open cut tunnel structure

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] refer to figure 1 , a large-span and high-backfill open cavity structure of the present invention includes: left wall 11 and right wall 12, which are respectively poured on the lateral sides of the open cavity section; bottom plate 13, which is poured between the lower ends of left wall 11 and right wall 12; truss arch The roof 20 is a reinforced concrete structure, which is arranged on the upper ends of the left wall 11 and the right wall 12 and is integrated with them. Compared with the traditional arched open hole lining structure, it has the following advantages: the vertical bending rigidity of the section is large, and the mechanical properties of the material can be better exerted under the condition of large bending moment, which can be flexibly changed according to the magnitude of the force The rigidity and section characteristics of e...

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Abstract

The invention discloses a long-span high-backfill open cut tunnel structure. On the premise of ensuring that the structure is safely stressed, the thickness of a concrete lining structure is reduced, and the requirements on structural safety and durability are met. The structure comprises a left side wall (11) and a right side wall (12) which are respectively poured on the crosswise side of the section of the open cut tunnel, a bottom plate (13) which is poured between the lower end of the left side wall (11) and the lower end of the right side wall (12), and a truss arch crown (20) which has a reinforced concrete structure and is arranged at the upper ends of the left side wall (11) and the right side wall (12) and fixedly combined with the left side wall (11) and the right side wall (12) into a whole.

Description

technical field [0001] The invention relates to a tunnel structure, in particular to a large-span and high-backfill open hole structure. Background technique [0002] Considering the requirements of saving project cost, reserving planned land, and reducing operational risks, etc., in the design of railways and highways, tunnels with open holes are adopted in the design of high slopes, dangerous rockfall sections, or sections that cannot be avoided due to planning needs, especially in The construction of railways in mountainous areas requires large span and high backfill tunnel lining structures due to station setup requirements. The span of tunnel lining has been developed from ordinary single- and double-line tunnels to three- and four-line tunnels, and even multi-line tunnels. With the continuous breakthrough of tunnel spans, the thickness and load of tunnel lining and backfill soil are constantly increasing to ensure safe open tunnels. The thickness of the structure cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
Inventor 高杨朱颖杨雄赵万强郑宗溪陈赤坤谭永杰王建磊何昌国陶伟明匡亮琚国全袁伟周路军陈勇凌燕婷薛强
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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