基于多拱梁和刚体极限法雨棚拱坝性能分析

Performance Analysis of Canopy Arch Dam Based on Multiple Arch Beams and Rigid Body Limit Method

由于修建水库时低估岸坡安全系数和大坝应力计算误差较大,导致拱坝与库坡之间稳定性差。因此,在水库工程选址初期,确定拱坝安全系数和大坝应力十分重要。以雨棚拱坝为例,在坝体抗滑稳定和应力计算的荷载组合中提出基本组合和特殊组合两种方式,并采用拱坝多拱梁混合法和刚体极限稳定方法计算坝体应力和坝肩岩体的稳定,研究方法可为相关工程提供参考与借鉴。

Because the underestimated bank slope safety factor and large dam stress calculation error during reservoir construction lead to poor stability between arch dam and reservoir slope,it is very important to accurately determine the arch dam safety factor and large dam stress at the initial stage of reservoir engineering site selection.Taking the canopy arch dam as an example,this paper puts forward two ways of basic combination and special combination in the load combination of anti sliding stability and stress calculation of the dam body,and calculates the dam body stress and the stability of dam abutment rock mass using the arch dam multi arch beam hybrid method and rigid body limit stability method.The research method can provide reference for related projects.