Shun Bolt Tubular Anchor
A technology of tubular and anchor rods, which is applied in the installation of anchor rods, sheet pile walls, blasting, etc., can solve the problems that restrict the application and development of rock-soil anchoring technology, cannot adapt to weak rock-soil bodies, and cannot provide anchoring force, etc., to achieve Improve rock and soil anchoring effect, simple structure and easy processing
Inactive Publication Date: 2015-12-09
LANZHOU UNIVERSITY
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Problems solved by technology
When the anchoring force that needs to be provided is large, ordinary bolt anchorage can no longer meet the needs of the project, which undoubtedly restricts the application and development of rock-soil anchorage technology. How to improve the load transfer mechanism of rock-soil anchorage and overcome the disadvantages of ordinary friction anchorage , which becomes the fundamental way to improve the anchoring force of bolts and promote the development of rock-soil anchoring technology
[0005] In addition, the grouting body in rock-soil anchorage can hardly provide anchoring force before consolidation, so it cannot meet the requirement of providing anchoring force immediately after excavation of weak rock-soil mass
Although the existing pipe-slit bolts overcome the above-mentioned shortcomings, the anchoring force can be provided immediately after the bolt is installed, which is beneficial to timely control the deformation of the rock and soil mass, but the anchoring force that can be provided is not large; at the same time, due to the weak The rock and soil will be squeezed into the pipe cavity from the pipe seam of the pipe seam anchor, which will cause a further decrease in the anchoring force
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[0018] Such as Figure 1~3 As shown, the down-bolt tubular anchor rod includes open ends, a hollow tubular rod body 4, a retaining ring 7 and a backing plate 8. Closed bolts 17 are distributed on the pipe wall 14 of the tubular rod body 4, the top of which is filled with gun mud 13 and is provided with a retaining ring 7 with a backing plate 8; 10 detonating charge package 9; be provided with columnar charge 12 in the pipe wall 14 that is provided with sealing along bolt 17.
[0019] Wherein: detonator 10 is connected with detonator foot line 11.
[0020] The closed parallel bolt 17 is separated from the pipe wall 14 in the circumferential direction through the axial groove 15 provided on the pipe wall 14, and at the same time passes through the circumferential groove 16 provided on the pipe wall 14 and the pipe wall in the direction of the top end of the tubular rod body 4. 14 separates, and only links to each other with pipe wall 14 on the bottom end direction of tubular r...
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The invention relates to a sequential plug tube type anchor rod. The sequential plug tube type anchor rod comprises a hollow tube type rod body with the two ends opened, a baffle ring and a base plate. Closed sequential plugs are distributed on the tube wall of the tube type rod body, and the top end of the tube type rod body is filled with stemming and is provided with the baffle ring with the base plate. Igniting primer which is provided with a detonator is arranged inside the tube wall of the bottom end of the tube type rod body, and columnar charged powder is arranged inside the tube wall which is provided with the closed sequential plugs. The sequential plug tube type anchor rod is simple in structure, convenient to construct and low in cost, anchoring force can be supplied immediately so as to control rock and earth mass deformation, meanwhile, a rock and soil anchoring load transferring mechanism is improved, so that the anchoring force of the anchor rod is improved, hence, the stability of rock and earth mass is dramatically improved, and the security of anchoring engineering can be greatly enhanced.
Description
technical field [0001] The invention relates to rock-soil anchoring technology, in particular to a down-bolt tubular anchor rod. Background technique [0002] Rock-soil anchoring is to tightly interlock the strata through the anchor bolts buried in the formation, relying on the interaction between the anchor bolt-grouting body-hole wall rock-soil physical force to mobilize and improve the rock-soil mass's own strength and natural strength. It is a technology to improve the stress state and stabilize the rock and soil to ensure the safety of the project. The engineering application of geotechnical anchoring technology originated at the end of the 19th century. With the development of its theoretical research and engineering application, this technology has been widely used in mining, water conservancy, hydropower, highway, railway, municipal, urban construction, geology, military industry and other departments. As an ideal support form, it plays an important role in the stab...
Claims
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IPC IPC(8): E21D21/00E02D5/74F42D3/04
Inventor 言志信江平
Owner LANZHOU UNIVERSITY