东深供水改造工程BIII2边坡预应力锚索加固优化设计

针对BIII2边坡的地质环境因素，讨论了该类边坡预应力锚索加固设计中的若干重要问题。在此基础上，对预应力锚索的受力特性和边坡稳定性进行了计算分析。应用优化与决策理论，对影响锚固设计参数的因素进行分析，找出影响锚索设计参数的关键因素，确定最优设计参数，并提出该边坡的预应力锚索加固优化设计方案。加固后的稳定分析表明，采用此方案进行加固设计是合理可行的，这对该边坡的及时治理起到了重要的作用。

OPTIMUM DESIGN OF PRESTRESSED ANCHOR CABLES FOR BIII_2 LANDSLIDE IN WATER SUPPLY RECONSTRUCTION PROJECT FROM DONGJIANG TO SHENZHEN

The fundamental features of the landslide BIII2 with expansive soil and soft rock,occurring in water supply reconstruction projection from Dongjiang to Shenzhen, is analyzed in this paper. Some important issues of reinforcing design with prestressed anchor cables are discussed. The bearing force characteristic of prestressed anchor cables and the stability of the slope are analyzed according to the considered issues. The key factors that influence the design parameter are identified based on analysis of factors with application of theory of optimization and decision. The optimum value of design parameter is determined by optimal decision of the key factors. The optimum design of reinforcing project with prestressed anchor cables is given based on the analysis of sliding surface and the strength data. Finally the stability analysis of the BIII2 landslide shows that the reinforcing project is feasible and have played an important role in timely treatment of the landslide.