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Steel grating assisted diversion tunnel preliminary bracing structure and method

A technology for primary support and water diversion tunnels, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of reduced construction efficiency, complicated manufacturing process, and increased construction cost, and achieves improved construction efficiency, simple manufacturing process, and support firm effect

Inactive Publication Date: 2016-07-20
THE THIRD CONSTR CO LTD OF CTCE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Through comparison, it is found that the above-mentioned patent publication uses a steel arch support structure, which not only wastes a lot of steel, but also has a complicated manufacturing process, which increases construction costs and reduces construction efficiency

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  • Steel grating assisted diversion tunnel preliminary bracing structure and method
  • Steel grating assisted diversion tunnel preliminary bracing structure and method
  • Steel grating assisted diversion tunnel preliminary bracing structure and method

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments.

[0036] A steel grid auxiliary diversion tunnel primary support structure, such as figure 1 As shown, it includes a vertical section 3 and an arched section 1. The arched section is an arc-shaped structure, and its two ends are symmetrically connected to the vertical section, thereby forming a support structure for the tunnel. The arch section and the two vertical sections are fixed together by connecting steel plates 2 . For the convenience of construction, the arch section is composed of two semi-arc units, and the space between the two semi-arc units (that is, the top of the arch section) is also fixed together by connecting steel plates. For the convenience of manufacture, the vertical section and the arched section are steel grid unit structures, such as figure 2 As shown, the steel grid unit includes four main bars 4 a...

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Abstract

The invention relates to a steel grating assisted diversion tunnel preliminary bracing structure. The steel grating assisted diversion tunnel preliminary bracing structure comprises vertical sections and an arch-shaped section, wherein the arch-shaped section is of a circular arc structure, the vertical sections are symmetrically connected to two end parts of the arch-shaped section, the vertical sections and the arch-shaped section are all of structures of steel grating units, each steel grating unit comprises four main reinforcements and a plurality of hoopings, the hoopings are horizontally and evenly arranged at intervals, and the main reinforcements are welded at four corners in each hooping. According to the steel grating assisted diversion tunnel preliminary bracing structure, four main reinforcements and a plurality of hoopings form an integral steel grating unit to form an arching frame. The steel grating assisted diversion tunnel preliminary bracing structure effectively solves the difficult problem of temporary supporting of a local crushing part of surrounding rock, the construction cost is reduced, and a series of potential safety hazards caused by crushing of the surrounding rock is eliminated. The steel grating assisted diversion tunnel preliminary bracing structure is simple and has scientific and reasonable design and simple manufacture process, the construction efficiency is effectively improved, the construction cost is reduced and thus the steel grating assisted diversion tunnel preliminary bracing structure has wide promotion and application value.

Description

technical field [0001] The invention belongs to the field of tunnel support, in particular to a steel grid auxiliary water diversion tunnel primary support structure and method. Background technique [0002] With population growth and economic development, the imbalance between water supply and demand has become an important factor affecting human survival and sustainable development in the 21st century. Long-distance water diversion is an important measure to adjust the uneven temporal and spatial distribution of regional water resources and realize the rational allocation of water resources. It is a long-term development trend. Many water diversion projects have no choice but to "drill mountains to divert water" because the lines cannot avoid the mountain. Affected by the characteristics of the water diversion project, the emergence of long-distance and small-section tunnels is inevitable. During the construction process, local surrounding rock fragmentation of the tunnel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/30
CPCE21D11/30
Inventor 李岩杨贤贵刘光荣张廷友刘博南保瑞
Owner THE THIRD CONSTR CO LTD OF CTCE GRP
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