Arch frame for underground tunnel and roadway engineering support and rapid support method of arch frame

A technology for underground tunnels and arches, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of unsatisfactory construction results, high cost, and long construction time, and meet the requirements of construction support strength and large bearing capacity , The effect of convenient construction

Inactive Publication Date: 2020-01-31
周伟永
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  • Application Information

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Problems solved by technology

[0003] In China Patent Application No. 201821156117.9 "A Double-layer Arch Support Construction Device for Highway Soft Rock Tunnel", the support method of fixing the double-layer steel arch with posit...

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  • Arch frame for underground tunnel and roadway engineering support and rapid support method of arch frame
  • Arch frame for underground tunnel and roadway engineering support and rapid support method of arch frame

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specific Embodiment 1

[0042] The ore rocks in a mining area are developed with volcanic rocks. The footwall of the ore body is basalt and the hanging wall is tuff. The sprayed concrete support mode of the double-layer arch net of the present invention effectively utilizes the bearing capacity of the surrounding rock itself.

[0043] The parameters are as follows: the development ramp is excavated in tuff, its net section is 4.4m*4.3m (width*height), and it is supported by double-layer arch frame shotcrete, and the concrete thickness is 200mm. According to the stability requirements of the roadway, the rebar with a diameter of 22mm is selected, the length of the leg rebar 2 is 3200mm, the length of the inner arch 7 is 842mm, and the length of the outer arch 8 is 974mm. Two double-layer arches form an arch group, the distance between double-layer arches is 120mm, the distance between two arches is 150mm, and the distance between arch groups is 1200mm. The eight-shaped steel bars 3 are welded between...

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Abstract

The invention discloses an arch frame for underground tunnel and roadway engineering support and a rapid support method of the arch frame. Firstly, initial spraying is carried out on an excavating tunnel or a roadway, bottom plate dross at the tunnel or roadway support arch part is cleaned, prefabricated dual arch frame bodies are assembled according to the designed position, the dual arch frame bodies are welded to form the complete arch frame, steel bar meshes are tightly attached to the outer contour of the arch frame, the arch frame is fixed with anchor rods according to the designed positions, and the arch frame and the meshes are fixed according to the requirements; the steel arch frame is fixed with the positioning arch rods, and the two sides of the steel arch frame are horizontally supported and connected; and through concrete spraying support, the arch frame and protolith are integrated, and the stability of surrounding rocks is enhanced. Dual arch frame steel bar mesh concrete support is adopted, support arch frame steel bar mesh concrete and the surrounding rocks become an organic whole, the bearing capacity of the surrounding rocks is given full play to, the bearing capacity is high, the requirements of construction support strength are met, the support effect is good, construction is convenient and fast, the speed is high, the labor intensity is low, and the support cost is saved.

Description

Technical field: [0001] The invention belongs to the technical field of underground mines and municipal engineering, and mainly relates to a double-layer arch frame and a rapid support method for underground tunnel and roadway engineering support, which fully exerts the bearing capacity of the surrounding rock itself and is mainly suitable for rock stability Bad, relatively broken and soft rock mass. Background technique: [0002] In recent years, with the social and economic development of the country, infrastructure construction and mining have been increasing. During the excavation of roadway excavation in mines and highway tunnel projects, rocks are often broken and soft rocks are often encountered. I-beams and Concrete support, this support method is time-consuming and costly; the use of anchor net support is prone to excessive deformation and yield, which cannot meet its stability requirements, and construction safety has become a prominent problem. For this reason, a...

Claims

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Application Information

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IPC IPC(8): E21D11/18E21D11/15E21D11/10
CPCE21D11/105E21D11/152E21D11/18
Inventor 黄杨周伟永黄宜华
Owner 周伟永
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