A Design Method of Pressure Type Anchor Cable
A design method and pressure-type technology, applied in the direction of calculation, special data processing applications, instruments, etc., can solve the problem that the shear damage of the anchoring section threatens the safety of the anchoring project, it is difficult to conform to the actual environment and structure of the construction site, and the cost of the long anchoring section increases. major problems, to achieve the effects of significant social and economic benefits, saving material consumption and shortening the length of the anchor cable
Active Publication Date: 2015-12-30
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology
[0004] Existing design methods mainly rely on experience to determine the number of anchor cable holes, and assume that the shear stress is uniformly distributed in the construction environment. In the actual construction environment, the shear stress between the pressure-type anchor cable grouting body and the rock-soil Evenly distributed, the uniform shear stress method adopted by the existing codes is too rough, which is likely to cause large deviations that are difficult to conform to the actual environment and structure of the construction site. Even the shear failure of the anchorage section threatens the safety of the anchorage project
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[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0019] In the design method of a pressure-type anchor cable in this embodiment, the balance equation is established considering the confining pressure of the rock and soil mass on the grouting body, and a more accurate shear stress expression is obtained by further solving, and the determined grouting body Substituting the actual basic parameters of the rock and soil into the formula, combined with the shear strength of the grouting body and the rock and soil obtained from the pullout test of the actual engineering area, the maximum anchoring force of the anchor cable is obtained. According to this relatively accurate maximum anchoring force Calculate the number of anchor holes required on the rock and soil mass and the number of steel strands required for each anchor hole; at the same time, after determining the basic parameters of the grouting body and...
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The invention discloses a design method for a pressure type anchor cable. Uneven distribution of shearing stress on the construction site is taken into consideration, the pressure type anchor cable is designed according to actually-measured parameters, the interface shearing stress formula of a pressure type anchor cable anchor body and a rock-soil body is well matched with actual measurement, and the actual stress state of the anchor cable is reflected more accurately. Compared with a roughly even shearing stress adopted through existing standards, the derived interface shearing stress formula of the pressure type anchor cable anchor body and the rock-soil body is well matched with actual measurement, and the actual stress state of the anchor cable can be reflected more accurately. The design method for the pressure type anchor cable ensures safety and reliability of anchor engineering, shortens the length of the anchor cable, reduces the construction cost, can be widely applied to design and guide construction of the pressure type anchor cable, and is significant in social benefit and economic benefit.
Description
technical field [0001] The invention relates to the design field of prestressed anchor cables, in particular to a design method of pressure-type anchor cables. Background technique [0002] As an important active reinforcement method, the pressure-type anchor cable has the characteristics of safety, reliability, fast construction speed, economy and practicality. It is more and more widely used in geological reinforcement of geotechnical engineering. Put the bearing plate at the bottom of the anchor hole, insert the steel strand into the anchor hole and wrap the steel strand with a plastic film, and finally inject slurry into the gap. played an irreplaceable role. [0003] The existing anchor cable design method assumes the number of anchor cable holes based on experience, and determines the maximum anchoring force of the anchor cable and the number of steel strands of the anchor cable in combination with the load of the anchor cable structure. Finally, determine the length...
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IPC IPC(8): E02D5/74G06F19/00G06F17/50
Inventor 陈远洪陈占李小和赵新益邬强刘庆辉韦随庆廖进星
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP