Fracture developed high rock slope anchor cable hole forming accurate control method
A technology of rock slope and control method, which is applied in the direction of excavation, sheet pile wall, construction, etc., can solve the problems of increased additional stress of anchor cables, uncoordinated support, failure of anchor cables, etc., so as to reduce construction difficulty and prevent The effect of anchor cable failure and small transmission loss
Active Publication Date: 2021-01-01
中建五局第三建设有限公司
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Problems solved by technology
During on-site construction, due to the repeated vibration of the drilling rig, the angle of the drilling hole often deviates from the original design inclination, resulting in an increase in the additional stress of the anchor cable and uncoordinated support, which will seriously cause the anchor cable to fail and cause a safety accident
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[0031] The present invention will be further described below in combination with specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.
[0032] like Figures 1 to 6 As shown, a method for precise control of the hole-forming line shape of the anchor cable on the high and steep rock slope with fractures, including the following steps:
[0033] a. Locate the position of the anchor cable hole 6, and determine the inclination angle and diameter of the anchor cable hole 6. With the anchor cable hole 6 as the center, arrange three reinforcement holes 7 tangent to the outer diameter of the anchor cable hole 6, three The connecting line between the center points of the reinforcement hole 7 is an equilateral triangle, and the diameter of the reinforcement hole 7 is determined;
[0034] b. Construction of reinforcement hole 7:
[0035] Fix the angle fix...
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The invention relates to a fracture developed high rock slope anchor cable hole forming accurate control method. A micro-hole drilling machine is fixed into a groove in an angle fixator so as to forma micro-reinforcing hole, fracture grouting is performed after a simple triangle is formed, the effective radius of the reinforcing hole is tangent to an anchor cable hole in the geometric center of the simple triangle through the fracture grouting, finally, an optical fiber sleeve is fixed by using the angle fixator, and percussion drilling is performed so as to form the anchor cable hole. According to the fracture developed high rock slope anchor cable hole forming accurate control method, the hole forming control over an anchor cable is designed, on the basis that the normal anchor cable hole forming construction in a fracture developed slope is guaranteed, the drilling quality is increased, and the hole forming angle and path are controlled.
Description
technical field [0001] The invention belongs to the technical field of underground engineering construction support, and in particular relates to a method for precisely controlling the hole-forming line shape of an anchor cable on a high and steep rock slope with cracks. Background technique [0002] Anchor cable technology originated from one of the most basic support forms in coal mine roadway support. After continuous improvement and innovation, it has been widely used in foundation pit engineering, retaining engineering, underground engineering and other fields. Anchor cable anchoring technology is an effective support technology. The force transmission in anchor cable anchoring technology is very complicated. Affected by various factors such as materials, slope properties, buried depth and length, the anchor cable is fixed on the slope surface through the outer end. The other end is anchored in the stable rock mass within the sliding surface, and the prestressed steel s...
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IPC IPC(8): E02D5/74E02D17/20
CPCE02D5/74E02D17/20E02D2600/10E02D2600/30E02D2600/40
Inventor 何昌杰李建新贺泳超雷勇陈秋南黄小城
Owner 中建五局第三建设有限公司