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Pulling reinforcement method for internal fissure of dangerous rock

A technology for fissures and dangerous rocks, applied in the field of tie reinforcement of internal fissures in dangerous rocks, can solve the problems of inconvenient handling and construction, excessive length of anchor rods, and economic waste, saving manpower and material resources, saving steel and material costs, Ease of construction

Inactive Publication Date: 2012-09-12
CHONGQING UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional anchoring technology adopts the method of penetrating the dangerous rock and the fracture surface between the dangerous rock and the parent rock mass for reinforcement, and enters the parent rock mass for reinforcement. Since it is necessary to penetrate the dangerous rock first and then enter the parent rock mass, the required anchor rod reinforcement The length is often longer. When the volume of the dangerous rock block is large and the internal cracks between the dangerous rock block and the parent rock mass are relatively deep, the length of the anchor rod reinforcement will be even greater, which is likely to cause economic waste.
At the same time, in the traditional anchoring process, since the anchor rod needs to have sufficient length, it is very inconvenient in the process of handling and construction, and it also causes a waste of manpower

Method used

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  • Pulling reinforcement method for internal fissure of dangerous rock
  • Pulling reinforcement method for internal fissure of dangerous rock
  • Pulling reinforcement method for internal fissure of dangerous rock

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: see figure 1 , figure 2 and image 3 , a method for tightening internal cracks in dangerous rocks, comprising the following steps:

[0028] 1) Stability analysis of the dangerous rock mass 2: According to the mechanical parameters of the dangerous rock mass and internal cracks provided by the geological survey report, including the gravity and geometric shape of the dangerous rock mass, the sliding force of the dangerous rock mass and the relationship between the dangerous rock mass and the parent The frictional resistance between rock masses, etc., according to the stability coefficient requirements of the reinforcement and treatment of dangerous rock masses, the anchoring force required for the reinforcement of dangerous rock masses is calculated, and the cross-sectional area of ​​the anchor rod and the anchoring force are calculated according to the anchoring force. quantity. The stability factor requirements are determined according to the relevant...

Embodiment 2

[0036] Example 2, in the actual construction process, in the treatment of group collapse dangerous rocks, the above-mentioned method is used to carry out the bolt tie construction step by step from the internal cracks closest to the stable parent rock mass, and finally construct the closest to the outer surface. For internal cracks, tie knots one by one until the overall reinforcement is completed. The invention can achieve a very good treatment effect on the treatment of mass collapse dangerous rocks. see Figure 4 , in the construction process, adopt the construction method described in embodiment 1, when drilling the anchor hole, drill from the appearance of the second dangerous rock mass 22 and the fourth dangerous rock mass 24 (ie the outermost dangerous rock mass), and make Anchor holes pass through multi-level internal fissures, and then are constructed step by step from the internal fissures closest to the stable parent rock mass 1. First, the parent rock mass 1 is co...

Embodiment 3

[0037] Embodiment 3, the present invention is applied to rock mass underground excavation engineering, see Figure 5 During construction, the dangerous rock mass 2 in the surrounding rock is bound and reinforced by the anchor rod 3 and the parent rock mass 1, which can effectively prevent the dangerous rock block from falling or collapsing in the surrounding rock, and ensure the safety of construction and use.

[0038] In addition, the anchor rod structure adopted in the present invention can also be replaced by anchor pieces of other structural forms such as anchor cables.

[0039]

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Abstract

The invention discloses a pulling reinforcement method for an internal fissure of a dangerous rock. The method includes the steps: 1) analyzing stability of a dangerous rock body; 2) searching the outer surface of the dangerous rock body and determining an anchoring position; 3) drilling an anchor hole at the determined anchoring position; 4) manufacturing an anchor rod as needed; 5) placing the anchor rod into the anchor hole; and 6) grouting the anchor hole, vibrating and compacting grouted slurry until solidification of the grouted slurry to complete pulling reinforcement. Based on the related mechanics principle, traditional penetration anchorage with a full-length constant-section anchor rod is reasonably improved, the rock body on two sides of the internal fissure is reliably pulled and reinforced, and steel for a less stressed position far away from the internal fissure is saved. The method is applicable to reinforcing various enormous and extensive dangerous rocks in a mountainous area, is simple and convenient in construction, safe and reliable, serves as an effective means for reinforcing the dangerous rocks, and has excellent economy as compared with a traditional penetration anchor rod supporting method.

Description

technical field [0001] The invention relates to a method for reinforcing dangerous rocks, in particular to a method for reinforcing internal fissures in dangerous rocks. [0002] Background technique [0003] Dangerous rocks are some precarious rocks on steep rock slopes. Under the influence of certain factors, dangerous rocks will fall down and form avalanches. Therefore, dangerous rocks must be treated in time to ensure the safety of people's lives and properties. Improving the technical level of dangerous rock treatment and preventing dangerous rock disasters is of great significance to protecting people's life and property safety. [0004] The traditional anchoring technology adopts the method of penetrating the dangerous rock and the fracture surface between the dangerous rock and the parent rock mass for reinforcement, and enters the parent rock mass for reinforcement. Since it is necessary to penetrate the dangerous rock first and then enter the parent rock mass, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/20E02D5/76
Inventor 曾祥勇梁健王达诠
Owner CHONGQING UNIV
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