基于GA-GRNN地应力场反演的超长深埋隧洞围岩稳定性研究  

Research on Stability of Utralong and Deep-Buried Tunnel Surrounding Rocks Based on GA-GRNN Geostress Field Inversion

作　　者：郭冲 王翰盛 邓伟杰 赵顺利 杜卫长 GUO Chong;WANG Hansheng;DENG Weijie;ZHAO Shunli;DU Weichang(Jianghe Engineering Inspection and Testing Co.,Ltd.,Zhengzhou 450003,China;Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China;Hangzhou Huajin Lianzhe Intellectual Property Agency Co.,Ltd.,Hangzhou 310051,China)

机构地区：[1]江河工程检验检测有限公司,河南郑州450003 [2]黄河勘测规划设计研究院有限公司,河南郑州450003 [3]杭州华进联浙知识产权代理有限公司,浙江杭州310051

出　　处：《人民珠江》2024年第1期103-113,共11页Pearl River

基　　金：国家重点研发计划(2019YFC1509905);黄河勘测规划设计研究院有限公司自主研究开发项目(2019-ky08);江河工程检验检测有限公司自主研究开发项目(JH-ky04-2022)。

摘　　要：基于超长距离引调水工程地质条件及实测地应力资料,建立了工程引水线路初始地应力场三维反演计算模型。通过遗传算法优化广义回归神经网络方法(GA-GRNN),较为准确地反演了工程引水线路的初始地应力场。基于初始地应力场,对长距离引水线路地应力进行分区,并在各分区选择典型断面进行隧洞围岩稳定分析。研究结果表明:工程区应力场以多隆沟断裂带为界,西侧为水平构造应力区,极高地应力区和高地应力区多分布于地质构造带附近,需注意应力释放导致的岩爆发生;多隆沟断裂带东侧为自重应力区,中等地应力区多分布于此,围岩稳定性相对较好。According to the geological condition and measured geostress data of the utralong-distance water diversion project,a 3D inversion calculation model of the initial geostress field of the water diversion route was established.The initial geostress field of the water diversion route was exactly simulated through the method of generalized regression neural network(GRNN)optimized by genetic algorithms(GA-GRNN).Based on the initial geostress field,the geostress of the water diversion route was partitioned,and the stability of the tunnel surrounding rocks in typical sections was analyzed.The research results show that the geostress field is bounded by Duolong gully fault belt,and the west of the fault belt is a horizontal tectonic stress area.Extremely high and high geostress areas are distributed in geological structural belts where attention should be paid to rock bursts caused by stress release.The east of the Duolong gully fault belt is the self-weight stress area,and the moderate geostress area is distributed here.The stability of the surrounding rocks here is relatively good.

关 键 词：初始地应力 神经网络 遗传算法 围岩稳定 

分 类 号：TV672[水利工程—水利水电工程]