引黄济宁工程隧洞穿越活动性断裂响应特征研究  

Study on the Response Characteristics of Tunnel Crossing Active Faults of the Yellow River to Xining Water Diversion Project

作　　者：杨继华 崔臻[2] 万伟锋 刘振红 郭卫新 Yang Jihua;Cui Zhen;Wan Weifeng;Liu Zhenhong;Guo Weixin(Yellow River Engineering Consulting Co.,Ltd,Zhengzhou 450003,P.R.China;Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,P.R.China)

机构地区：[1]黄河勘测规划设计研究院有限公司,郑州450003 [2]中国科学院武汉岩土力学研究所,武汉430071

出　　处：《地下空间与工程学报》2025年第1期283-292,共10页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金(52079133);黄河勘测规划设计研究院有限公司自主研究开发项目(2020-ky04,2022KY003,2023KY014)。

摘　　要：青海省引黄济宁工程隧洞全长74.4 km,隧洞穿越4条区域活动性断裂。保证隧洞穿越活动性断裂的安全是引黄济宁工程面临的关键问题之一。首先,提出了各活动性断裂的基本参数,为针对性设计提供了依据。其次,以青海南山北缘断裂(F_(2))为例,采用数值模拟的方法,建立了隧洞穿越活动性断裂的弹塑性分析模型,研究了不同错动量下整体系衬砌和铰接衬砌的响应特征。结果表明:整体式衬砌条件下,隧洞的变形量、衬砌应力及内力均随错动量的增加而增加,左右边墙变形量、衬砌最大拉应力、剪力最大值出现在断裂带的中心部位,拱顶底板变形量、衬砌弯矩最大值出现在断裂带交接部位;铰接式衬砌条件下,隧洞不同部位的纵向应力、等效轴力、弯矩和剪力在断裂带错动量超过30 cm后,最大应力和内力没有表现出随错动量增加而增加的趋势,变形主要发生在铰接缝,有效改善了衬砌在错动条件下的受力状态。最后,提出了引黄济宁工程隧洞穿越活动性断裂下一步的研究方向。The Yellow River to Xining water diversion project tunnel in Qinghai province has a total length of 74.4km and cross four regional active faults.Ensuring the safety when tunnel crossing active faults is one of the key issues faced by the Yellow River to Xining water diversion project.Aiming at the above issues,firstly,a thematic research method was adopted to propose the basic parameters of each active fault,providing a basis for targeted design.Secondly,taking the northern edge fault(F_(2))of the Nanshan Mountains in Qinghai Province as an example,an elastic-plastic analysis model for tunnel crossing active faults was established using numerical simulation methods to study the response characteristics of the integral and hinged lining under different displacement.The results showed that under the condition of integral lining,the deformation,lining stress,and internal force of the tunnel increase with the increase of displacement.The deformation of the left and right side walls,the maximum tensile stress of the lining,and the maximum shear force appear at the center of the fault zone,while the deformation of the arch top and bottom plate,and the maximum bending moment of the lining appear at the intersection of the fault zone;Under the condition of hinged lining,the longitudinal stress,equivalent axial force,bending moment,and shear force in different parts of the tunnel do not show a significant increase in the maximum stress and internal force with the increase of displacement after reaching 30cm.The deformation mainly occurs at the hinge joint,effectively improving the stress state of the lining under displacement conditions.Finally,the next research direction for the Yellow River to Xining water diversion project tunnel crossing active faults is proposed.

关 键 词：引黄济宁工程 隧洞 活动性断裂 错动响应 铰接衬砌 

分 类 号：TV221[水利工程—水工结构工程]