Cake-shaped reinforced feather-key-resistant tubular type anchor rod
An anti-slip key, round cake-shaped technology, applied in the installation of bolts, sheet pile walls, mining equipment, etc., can solve the problems of decreased anchoring force, low anchoring force, and inability to adapt to weak rock and soil, and achieves good self-efficacy. Stabilization ability, improve stability, prevent failure effect
Inactive Publication Date: 2014-05-07
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 bolt 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 squeeze into the pipe cavity from the pipe seam of the pipe seam anchor, which will also cause a further decrease in the anchoring force
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[0019] Such as Figure 1~4 As shown, the round cake-shaped reinforced anti-slip key tube anchor rod includes a hollow tubular rod body 4 with openings at both ends, a retaining ring 7 and a backing plate 8 . A plurality of circular pieces 15 are distributed on the pipe wall 14 of the tubular rod body 4, and its top is filled with gun mud 13 and is provided with a retaining ring 7 with a backing plate 8; There is a detonating charge 9 with a detonator 10; a columnar charge 12 is arranged in a tube wall 14 provided with a circular block 15.
[0020] Wherein: circular piece 15 is made of a plurality of concentric closed sector pieces 17, and the arc of this closed sector piece 17 is all on the circumference of circular piece 15, and links to each other with pipe wall 14; The circular block 15 is a fan-shaped piece formed by the center of the circle and penetrating through the radial slit 18 of the pipe wall 14 .
[0021] The detonator 10 is connected with the detonator foot wir...
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The invention relates to a cake-shaped reinforced feather-key-resistant tubular type anchor rod which comprises a hollow tubular type rod body with the two ends opened, a baffle ring and a cushion board. Multiple circular blocks are distributed on the tube wall of the tubular type rod body. The top end of the tubular type rod body is filled with stemming and provided with the baffle ring with the cushion board; a primer cartridge with a detonator is arranged in the tube wall at the bottom end of the tubular type rod body; cylindrical power charge is arranged in the tube wall with the circular blocks. According to the cake-shaped reinforced feather-key-resistant tubular type anchor rod, the structure is simple, construction is convenient, and cost is low; the anchoring force can be supplied immediately so that rock and earth mass deformation can be controlled; meanwhile, a load transmission mechanism of rock and earth anchoring is improved so that the anchoring force of the anchor rod can be improved, the stability of a rock and earth mass can be remarkably improved, and the safety of anchorage engineering can be greatly enhanced.
Description
technical field [0001] The invention relates to rock-soil anchoring technology, in particular to a round cake-shaped reinforced anti-skid key tube type 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 of the anchored rock and soil mass to make it stable, so as to ensure the safety of the project. The engineering application of geotechnical anchoring technology originated from the end of the 19th century. With the development of its theory and technology, it has been widely used in mining, water conservancy, hydropower, highway, railway, municipal, urban construction, geology, military industry and other fields. The ideal support form plays an important ro...
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IPC IPC(8): E02D5/74E21D21/00
Inventor 言志信江平
Owner LANZHOU UNIVERSITY