引用本文:ZHANG Peng,LONG Yan-cheng,LUO Bing.[en_title][J].Journal of Chongqing University (English Edition),2017,16(1):38~50
ZHANG Peng,LONG Yan-cheng,LUO Bing.Prestressed tensioning method and its application to testing anchor stress of anchor cables for side-slope stabilization[J].Journal of Chongqing University (English Edition),2017,16(1):38~50
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Prestressed tensioning method and its application to testing anchor stress of anchor cables for side-slope stabilization
ZHANG Peng1,2, LONG Yan-cheng3, LUO Bing1,2
1.China Merchants Chongqing Communications Technology Research & Design Institute Co.,Ltd. Chongqing 400067, P. R. China;2.China Highway Engineering Technology & Research Center, Chongqing 400067, P. R. China;3.Guizhou Expressway Group Co.,Ltd., Guiyang, Guizhou 550004, P. R. China
摘要:
The anchor stress extent of a prestress anchor cable project has a direct relation with the project safety and performance. Prestressed tensioning method is a kind of nondestructive testing method, by which a reverse stretching load is applied on the external exposure section of anchor cable under construction or in service, and then the elongation variation of stress bars is measured to determine the anchor stress. We elaborated the theory and testing mechanism of prestressed tensioning method, and systematically studied key issues during the prestressed tensioning process of anchor cable by using physical model test, including the composition of tension stress-elongation curve, the variation of anchor stress, the compensation of locked anchor stress, and the judgment of anchor stress, and verified the theory feasibility of prestressed tensioning method. A case study on slope anchor cable of one highway project was conducted to further discuss on the test method, operation procedures and judgment of prestressed tensioning method on obtaining anchor stress, and then the test data of three situations were analyzed. The result provides a theoretical basis and technical base for the application of prestressed tensioning method to the evaluation of construction quality and operation conditions of anchor cable project.
关键词:  anchor cable  anchor stress  prestressed tensioning method  model test
DOI:10.11835/j.issn.1671-8224.2017.01.004
分类号:
基金项目:Funded by the Science and Technolog Program of Ministry of Transport of P. R. China (No. 2012318352100)
Prestressed tensioning method and its application to testing anchor stress of anchor cables for side-slope stabilization
ZHANG Peng1,2, LONG Yan-cheng3, LUO Bing1,2
1.China Merchants Chongqing Communications Technology Research & Design Institute Co.,Ltd. Chongqing 400067, P. R. China;2.China Highway Engineering Technology & Research Center, Chongqing 400067, P. R. China;3.Guizhou Expressway Group Co.,Ltd., Guiyang, Guizhou 550004, P. R. China
Abstract:
The anchor stress extent of a prestress anchor cable project has a direct relation with the project safety and performance. Prestressed tensioning method is a kind of nondestructive testing method, by which a reverse stretching load is applied on the external exposure section of anchor cable under construction or in service, and then the elongation variation of stress bars is measured to determine the anchor stress. We elaborated the theory and testing mechanism of prestressed tensioning method, and systematically studied key issues during the prestressed tensioning process of anchor cable by using physical model test, including the composition of tension stress-elongation curve, the variation of anchor stress, the compensation of locked anchor stress, and the judgment of anchor stress, and verified the theory feasibility of prestressed tensioning method. A case study on slope anchor cable of one highway project was conducted to further discuss on the test method, operation procedures and judgment of prestressed tensioning method on obtaining anchor stress, and then the test data of three situations were analyzed. The result provides a theoretical basis and technical base for the application of prestressed tensioning method to the evaluation of construction quality and operation conditions of anchor cable project.
Key words:  anchor cable  anchor stress  prestressed tensioning method  model test
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