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Anti-rock burst and anti-rockfall flexible protection device and construction method for tunnel excavation

A flexible protection and tunnel excavation technology, which is applied in tunnels, tunnel linings, shaft equipment, etc., can solve problems such as hidden dangers of construction personnel and machinery, rock spalling on cave walls, and unpredictable rockbursts, and achieve standardization of installation procedures and prevent Rockburst and rockfall, the effect of easy operation

Active Publication Date: 2016-03-16
SICHUAN CHUANJIAO ROAD & BRIDGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Rockburst will cause the rock of the cave wall to peel off, and in severe cases, it will cause ejection, and the occurrence of rockburst is difficult to predict, which has formed a great safety hazard for construction personnel and machinery

Method used

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  • Anti-rock burst and anti-rockfall flexible protection device and construction method for tunnel excavation
  • Anti-rock burst and anti-rockfall flexible protection device and construction method for tunnel excavation
  • Anti-rock burst and anti-rockfall flexible protection device and construction method for tunnel excavation

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Embodiment Construction

[0033] Below in conjunction with accompanying drawing and specific implementation method, the present invention and construction technique are further described.

[0034] Such as Figure 1-4 As shown, the flexible protection device for tunnel excavation to prevent rockburst and rockfall includes: steel rope mesh 1 (specification: mesh size: 80mm×80mm, steel rope diameter Φ8), suture rope 2 (specification Φ8), expansion shell anchor rod 3 (specification R25), support ropes 8 and fixed plates 10, each support rope 8 crosses to form a square grid of 1.5m×1.5m, and steel rope nets 1 equal to the number of grids are sewn on each net by sewing rope 2 In the grid, the suture rope 2 is pre-tightened with a rope tightener, so that the steel rope mesh 1 has a better bearing capacity for rock face falling or rockfall, so as to prevent the occurrence of collapse and rockfall injuries; the position where the support rope 8 intersects Form the nodes of each grid, and each of the nodes pass...

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Abstract

The invention discloses an anti-rock burst and anti-rockfall flexible protection device and a construction method for tunnel excavation. The device comprises a steel rope net (1), a sewing rope (2), a expansion type anchor rod (3), supporting ropes (8) and a fixing plate (10). The supporting ropes (8) are intersected to form square grids. The number of grids in the steel rope net (1) is equal to the number of the above square grids. The steel rope net (1) is sewn inside grid via the sewing rope (2). The sewing rope (2) is pre-tightened via a rope tightener. By means of the device, the rock stability is improved, and the exposure duration of surrounding rocks is shortened. Meanwhile, the occurrence of rock burst and stone collapse is prevented as much as possible. Moreover, small collapsed stones are limited within a confined space. Therefore, the rock-burst and rockfall problem, that might occur after tunnel excavation blasting and supporting process, can be well solved.

Description

technical field [0001] The invention is applicable to the technical field of deep-buried rock tunnel engineering construction. By using the flexible protective net to actively protect the wall of the bare cavern, as a support during the construction of the rockburst section of the tunnel, it greatly reduces the impact of the rockburst on subsequent construction personnel and Safety threats to construction machinery. Background technique [0002] With the acceleration of national infrastructure construction, the construction of transportation facilities has also been greatly developed. The construction of tunnels in the construction of roads and railways can greatly reduce the driving distance, shorten the running time, improve the safety of driving, and at the same time save ground land and play a role in protecting the environment. With the rapid development of tunnel engineering, some problems have also appeared in the tunnel construction, especially with the continuous i...

Claims

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Application Information

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IPC IPC(8): E21D11/00E21D11/15
CPCE21D11/006E21D11/152
Inventor 张睿杜江林汪碧云喻业洪江俊杰
Owner SICHUAN CHUANJIAO ROAD & BRIDGE
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