边坡预应力锚索加固的数值模拟方法研究_李宁.pdf

26 2 Vol.26 No.2 2007 2 Chinese Journal of Rock Mechanics and Engineering Feb .2007 12 1 1 1. 710048 2. 730000 TU 45 P 642.22 A 1000 6915 2007 02 0254 08 RESEARCH ON METHOD OF NUMERICAL SIMULATION OF PRESTRESSED ANCHOR CABLE IN SLOPE 12 1 1 LI Ning ZHANG Peng YU Chong 1. Institute of Geotechnical Engineering Xi ′an University of Technology Xi ′an Shaanxi710048China 2. State Key Laboratory of Frozen Soil Engineering Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of SciencesLanzhou Gansu730000China Abstract Prestressed anchor cable have been widely used as a main reinforcement method in geotechnical engineeringand its effective reinforcement capabilities have been validated by many project cases. Howeverfor the existing method of numerical simulation of prestressed anchor cable in slope has some disadvantages the result of numerical simulation in FEM isn′t in accord with practical one. This paper tries to discuss these disadvantages about the existing method of numerical simulation of prestressed anchor cable in slope and put forward a series of measures. Thenthe authors suggest a new method of numerical simulation of prestressed anchor cable in slope which will simulate the whole process in construction and operation period. At lastthe abutment slope in Jinping Hydroelectrical Project illustrates the difference between the existing method and the proposed method. Key words rock mechanics slope engineeringprestressed anchor cable numerical simulation 1 [18] 2006 02 112006 03 23 座机电话号码 座机电话号码08 1959 1982 E-mail ningli@xaut.edu.cn 26 2 . ? 255 ? [920] [10 11 16 19] 2 [12] [13] [14] 2.1 [11] [15] 2.2 1 2 2.3 [15] ·256 · 2007 1 ε f ε f a 3 # 2 b 3.1 c 1 Fig.1 Displacement vectors of excavated slope by different prestressed bolt models 3.2 + ?F ?F