Design method for tensile type anchor cable

A design method and anchor cable technology, which are applied in construction, sheet pile wall, foundation structure engineering, etc., can solve problems such as rough, difficult to conform to the actual environment and structure of the construction site, and the increased cost of the long anchoring section.

CN103924591AActive Publication Date: 2014-07-16中铁四院集团南宁勘察设计院有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-07-16

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Abstract

The invention discloses a design method for a tensile type anchor cable. In view of the uneven distribution of shearing strength on the construction site, the tensile type anchor cable is designed according to actually measured parameters, a shearing strength formula of an anchorage body of the tensile type anchor cable and a rock and earth mass interface is better matched with an actually measured formula, and the actual stress state of the anchor cable is reflected more accurately. Compared with rough even shearing strength adopted in existing standards, the derived shearing strength formula of the anchorage body of the tensile type anchor cable and the rock and earth mass interface is matched with the actually measured formula, and the actual stress state of the anchor cable can be reflected more accurately. By the design method for the tensile type anchor cable, the safe and reliable anchorage engineering can be ensured, the length of the anchor cable is shortened, construction expenses are lowered, the design method can be widely applied to design and guiding construction of the tensile type anchor cable, and the social benefits and economic benefits are remarkable.
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Description

technical field

[0001] The invention relates to the design field of prestressed anchor cables, in particular to a design method of tension type anchor cables. Background technique

[0002] As an important active reinforcement method, the tensile anchor cable has the characteristics of safety, reliability, fast construction speed, economy and practicality, and is widely used in geological reinforcement of geotechnical engineering. A number of anchor cable holes are excavated in the rock and soil, steel strands are put into the anchor cable holes, grouting is made around the steel strands, and the grouting body and the steel strands are combined into an anchor section. The protection and reinforcement of high slope rock and soil plays 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 ca...

Examples

Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] In the design method of a tensile 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 , the actual basic parameters of the steel strand and the rock-soil mass are substituted into the formula, and combined with the shear strength of the grouting body and the rock-soil mass obtained from the pullout test of the actual engineering area, the maximum anchoring force of the anchor cable is obtained, which is more accurate Calculate the number of anchor holes required on the rock and soil and the number of steel strands required for each anchor hole; at the same time, after determining the basic parameters, the effective anchoring section of each a...