基于联合搜索法的3维土坡滑动面搜索方式及其程序实现

针对现阶段3维土坡滑动面搜索方式存在效率低、容易出现局部极值等问题，基于GIS栅格数据模型，提出以随机搜索确定初始滑动面、以模式搜索确定最终滑动面的3维土坡最危险滑动面搜索方式。结合该搜索方式，开发土坡稳定3维刚体法分析程序(Slope3D SCU)，并通过算例对该程序的稳定性与合理性进行验证。研究表明：该搜索方法不仅避免了安全系数在临界滑动面搜索过程中出现局部极值的情况，同时能提高滑动面搜索效率；该程序计算精度高、稳定可靠。依托狮子坪水电站土石坝监测数据，调用渗透压力实时监测结果，利用该程序对其坝坡在运行工况下3维稳定性进行分析，揭示了该土石坝坝坡的3维稳定特性。研究结果表明,该坝坡在运行工况下安全系数较高，坝坡处于稳定状态。

Joint Search Method of Three dimensional Slope Sliding Surface and Program Development

Based on GIS raster data model,the search method of the most dangerous three dimensional slope sliding surface with random search to determine the initial surface and pattern searh to determine the final surface was proposed.Combined with the search method,the program of slope stability with the analysis of 3D rigid body method was developed and verified by a numerical example to demonstrate the stability and rationality of program.The search illuminated that the search method not only avoided the situation that safety factor appears in local extremum in search progress of critical slip surface,but also improved the search efficiency of slip suerface and the program was highly accurate and stable.Furthermore,based on monitoring data of Shiziping Dam,the three dimensional stability analysis of the dam slope was carried out by the program.The search illuminated that the safety coefficient of dam slope was high under operating conditions and dam slope was in stable state.