边坡柔性加固系统设计计算原理及方法.pdfVIP

25 2 Vol.25 No.2 2006 2 Chinese Journal of Rock Mechanics and Engineering Feb. 2006 (() 611731) GTC P 642.22 A 2006 CONCEPTS AND METHOD OF SLOPE FLEXIBLE STABILIZATION SYSTEM YANG You-kui (Geobrugg Chengdu Co.Ltd. ChengduSichuan611731China) Abstract There are some obvious errors and incompleteness in the existing(available) dimensioning concept of GTC flexible slope stabilization systems made of high-strength steel wire mesh in combination with anchor bolt. Firstthe forces on the mesh resulting from partial instabilities are treated as two independent forces that can′t be mathematically determined because only one equilibrium equation for them can be formulated. One of the two forces has to be artificially assumed. Secondthe longitudinal tensile force of the mesh is assumed as only transmitting to the upper nail that isthe ability of the GTC flexible system transmitting force all around is neglected. The force concentration degree of the mesh at the upper nail is overestimated and the dimensioning results are too conservative. Thirdthe existing concept doesn′t consider the determination of the lowest force against pull-out of nail. In view of this situationbased on the action modethe Mohr-Coulomb criterion and the limit equilibrium principlethe concepts of the GTC system are corrected and perfected. Furthermorethe safety checking requirements and the methods to determine the bearing resistance of the systems are established and the methods to determine the anchoring requirement under different