基于洞周相对位移的地下洞室群系统模糊随机可靠度研究  

Study on Fuzzy Stochastic Reliability of Underground Cavern Group System Based on Relative Displacement around the Caverns

作　　者：熊峥 XIONG Zheng(CCCC Highway Consultants Co.,Ltd.,Beijing 100035,China)

机构地区：[1]中交公路规划设计院有限公司,北京100035

出　　处：《路基工程》2024年第4期42-47,共6页Subgrade Engineering

摘　　要：为求解地下洞室群的系统模糊随机可靠度,将地下洞室洞周相对位移值及相对位移允许值分别作为结构荷载和结构强度,构造地下洞室可靠性分析的功能函数显式表达式;以此为基础,既考虑岩体力学参数的随机性,又考虑洞周相对位移允许值的模糊性,并采用网络概率估算技术(PNET法)求解地下洞室群的系统模糊随机可靠度。以某水电站发电系统洞室群为例,采用上述方法对施工期洞室的系统模糊可靠度进行计算,并使用进化-支持向量机方法代替数值方法计算洞周相对位移,从而得到洞室群的系统模糊随机可靠度。To solve the fuzzy random reliability of underground cavern group system,the relative displacement value and relative displacement allowable value of the perimeter of the underground cavern are regarded as the structural load and structural strength respectively,and the explicit expression of the functional function for the reliability analysis of the underground cavern is constructed.On the basis of which,the randomness of the mechanical parameters of the rock body is considered,the fuzzy nature of the allowable value of the perimeter of the cavern relative displacement is taken into account,and the probabilistic estimation technique of the network(PNET method)is adopted to solve the systematic fuzzy stochastic reliability degree of underground cavern group.Taking the cavern group of power generation system of a hydropower station as an example,the system fuzzy reliability of the cavern is calculated during the construction period by using the method and use the evolution-support vector machine method instead of the numerical method to calculate the relative displacement around the cavern,so as to obtain the system fuzzy stochastic reliability of the cavern group.

关 键 词：地下洞室群 模糊随机可靠度 洞周相对位移 相对位移允许值 支持向量机 

分 类 号：U453.2[建筑科学—桥梁与隧道工程]