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《Chinese Journal of Underground Space and Engineering》 2009-S1
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Research into the Failure Modality and the Pulling Force Resistance of the Rock Anchorage

YANG Hai-wei1,LU Ji-qiang 2,ZHU Shao-rong3(1.Hebei Electric Power Design & Research Institute,Shijiazhuang 050081,China;2.Zhejiang Provincial Electric Power Design Institute,Hangzhou 310014,China;3.Jiangsu Provincial Communication Planning and Design Institute,Nanjing 210001,China)  
The rock anchorage,as special form of tower foundation in transmission line,can fully utilize the mechanical capability of the original rock,and it can supply good pulling resistance capacity.So such anchorage is popularized gradually in the tower foundation engineering for the overhead transmission line.In this paper,the different type of rock anchorage including the single-anchorage and direct-anchorage is simulated,by means of the software of MSC.Marc,as simulation software based on the principle of finite element analysis(FEA).In this paper the rock anchorage failure modality is simulated and analyzed in three different state of rock intensity including poor(IV class),common(III class) and good(II class).The results indicate that the rock intensity is a main factor to the failure modality,which is consistent to the real tests.The current failure modality in criterion was not actual in practice,and the geological condition for the foundation was restricted too rigorously,for the anchorageuse.The availability of Marc was substantiated too for resolving the geotechnical engineering practical problem.At the same time,the authors summarized 5 kinds of the failure modality,and studied the force of pulling resistance by the result of the real tests and FEA.Finally,the Fmax and Fmin computing formula were obtained.
【CateGory Index】: TU470.3
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