A Restorable Method of Prevention and Control of Bass Drum
A floor drum and bottom plate technology, which is applied in earthwork drilling, wellbore lining, tunnel lining, etc., can solve problems such as unsatisfactory bottom control and stability effects, and achieve the effect of maintaining stability and reducing horizontal force
Inactive Publication Date: 2017-09-12
HENAN POLYTECHNIC UNIV
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Problems solved by technology
[0006] The purpose of the present invention is to provide a repairable bottom drum prevention method, which solves the problem that the current bottom drum prevention and control method has an unsatisfactory effect on bottom control
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Embodiment Construction
[0026] The present invention will be described in detail below in combination with specific embodiments.
[0027] The structure provided by the present invention is a steel cement pile with a repeatable grouting pipe-long bottom angle anchor cable combination structure, and the broken surrounding rock is dynamically reinforced by using the PVC repeatable grouting pipes on both sides of the steel flange and in the anchor cable, The bearing capacity of the deep surrounding rock is mobilized through the anchor cable at the top of the pile, and the cantilever pile is turned into a restraint pile fixed at both ends, which not only better resists the high level of extrusion force acting on the bottom plate, but also maintains the surrounding rock at its high level. Intensity, to achieve an all-round strategy for internal and external causes.
[0028] A structure for preventing and controlling the bottom drum such as Figure 1 to Figure 5As shown, one end of the pile hole 1 runs thr...
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The invention discloses a repairable bottom heave prevention method. The pile holes are drilled, section steel is inserted, repeatable grouting pipes are inserted on both sides of the flanges of the section steel, and solidified grout is injected into the pile holes through the repeatable grouting pipes for construction. Anchor hole. The diameter of the anchor cable hole is slightly larger than the envelope diameter of the anchor cable reinforcement and the repeatable grouting pipe, and it is more convenient to feed the reinforcement. The pipe is used to inject cement slurry into the anchor cable hole; during the construction of the crown beam, the exposed anchor cable reinforcement is isolated with a soft sleeve or outer covering material, and the anchor surface is made to be a plane perpendicular to the extension direction of the reinforcement, which is convenient for anchoring. The cable is tensioned and locked, and the anchor cable is tensioned and locked 7 days after the crown beam is completed. The beneficial effect of the present invention is that the pile-anchor can be dynamically and timely repaired through repeated grouting, the stability of the environment of the pile-anchor system can be realized, and the stability of the pile-anchor system can be maintained for a long time.
Description
technical field [0001] The invention belongs to the technical fields of civil engineering and mining engineering, and relates to a repairable bottom drum prevention method. Background technique [0002] In the past 20 or 30 years, as the depth of underground mining has increased, the problem of floor drums in chambers (roadways) has become more and more prominent, especially in coal mines. At present, floor drums have become a common problem in coal mines in my country in the deep tunnels of coal mines. Bass heave is not only the main form of roadway failure, but also a difficult problem in roadway stability control. So far, there have been many methods of prevention and treatment of the bottom drum, but they are nothing more than two types of reinforcement methods or pressure relief methods. Engineering practice shows that, in addition to bearing the stress of self-weight, the rock chamber often also bears the residual structural stress. The latest research shows that th...
Claims
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IPC IPC(8): E21D11/00E21D11/10E21D20/00
Inventor 邹正盛郑清洁王树仁琚晓冬秦莞臻顿志林
Owner HENAN POLYTECHNIC UNIV