Adjacent existing railway steep mountain loosen control blast construction method

A construction method and technology for existing lines, which are applied in the field of loose control blasting construction on steep mountains adjacent to existing lines, to achieve the effects of resisting rockfall risks, avoiding safety risks, and preventing flying rocks too far.

Active Publication Date: 2014-03-12
中铁二十三局集团第四工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no mature controlled bla

Method used

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  • Adjacent existing railway steep mountain loosen control blast construction method
  • Adjacent existing railway steep mountain loosen control blast construction method
  • Adjacent existing railway steep mountain loosen control blast construction method

Examples

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Embodiment 1

[0035] Embodiment 1 This embodiment is the blasting construction of the DK368+000~+160 section of the Hunan-Guizhou Railway Capacity Expansion and Reconstruction Project.

[0036] 1. Project overview

[0037] The subgrade of section DK368+000~+160 of the Hunan-Guizhou Railway Capacity Expansion and Renovation Project looks like an isolated towering mountain, the right side is adjacent to the existing Hunan-Guizhou Railway, and the new Xianggui Railway passes through the middle of the mountain. The horizontal distance between the cutting top and the existing line in the explosion control section is 12.2-19.8m, the maximum excavation height is 51.6m, the maximum thickness is 32m, and the length along the line is 160m. The stone is limestone, and the controlled blasting volume is 146,000 m 3 .

[0038] The terrain of this section is a typical Guilin landform. The mountain is upright, towering, and steep. The side adjacent to the existing line presents a steep rock wall at an an...

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Abstract

The invention relates to the field of railway construction, and in particular relates to an adjacent existing railway steep mountain loosen control blast construction method, comprising a pre-protecting step and a blasting step; the pre-protecting step comprise procedures of reinforcing and constraining an anchor rod steel wire gauze, exerting horizontal constraining force, building a concrete stopping retaining wall, mounting a profile steel protecting frame bent, and constructing a rock fall groove and a bamboo protecting frame bent; the blasting step comprises a trail blasting step and a formal blasting step; the trail blasting step comprises the procedures of minor diameter shallow hole control blasting, minor diameter air drill vertical drilling, large diameter deep hole control blasting and mechanical crushing. By designing the blasting order and screening the blasting parameter, the blasted rolling stones are effectively controlled, the security of the operation railway is guaranteed, the blasting harmful effect control such as blasting vibration and blasting flyrock can achieve rule and scene safety requirement, and the interference to surroundings is maximally reduced.

Description

technical field [0001] The invention belongs to the technical field of railway construction, in particular to a construction method of controlled blasting for loosening of steep mountains adjacent to existing lines. Background technique [0002] With the continuous development of national railway construction, there are more and more cases of building new railway lines near existing railway lines, especially in special geological areas with more geographical constraints. The situation of the new line. In this case, it is necessary to face the problem of blasting in the steep mountains adjacent to the existing line. When designing a blasting plan, it is necessary to consider not only protecting the existing lines without causing geological disasters, but also maintaining the safety and stability of existing buildings and people's lives. At present, there is no mature controlled blasting construction technology that can be used. Therefore, it is an important topic in the fi...

Claims

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Application Information

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IPC IPC(8): F42D1/00
Inventor 王许雄张教才郭庆军杨俊东胡永松邱先锋
Owner 中铁二十三局集团第四工程有限公司
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