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《JOURNAL OF ENGINEERING GEOLOGY》 1995-01
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ANALYSIS ON THE LOAD LOSSES OF PRESTRESSED ROCK CABLLE BOLTS

Ding Duowen;Bai Shiwei(Institute of Rock and Soil Mechanics,Academia Sinica,Wuhan 430071)Luo Guoyu(Nanjing Universiy, Nanjing 210008)  
The enfored effect of the prestressed cable bolts is determined by the value of prestress. The loads supplied by the cable bolts must be sufficient so that at all times the stability of rock mass is retained. The load losses of the cable bolts are produced by the deformation of rock mass depending on time,corrosion and different kinds of structures etc. These porduce the bad effect of enforcement.The paper mainly study the load losses produced by the deformation of rock mass depending on time. The load losses of the cable bolts can be found by.According to the visco-elastic properties of rock mass σtf and σat are established. Finally.the effect of the free and anchored length on decreasing the load losses is discussed.
【CateGory Index】: TU751
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