穿越土岩交界面的隧洞围岩变形数值模拟分析  

Numerical Simulation Analysis of Surrounding Rock Deformation of Tunnel Crossing Soil-Rock Interface

作　　者：芦承澳 申继先 韩睿 范伟丽 杨长明 周海韵 李龙伟 LU Cheng ao;SHEN Jixian;HAN Rui;FAN Weili;YANG Changming;ZHOU Haiyun;LI Longwei(College of Water Conservancy&Hydropower Engineering,Hohai University,Nanjing 210024,Jiangsu,China;Henan Haihe River Basin Water Affairs Center,Xinxiang 453005,Henan,China;Jinan Hydrological and Architectural Survey and Design Research Institute Co.,Ltd.,Ji nan 250101,Shandong,China;Henan Water Conservancy and Environment Vocational College,Zhengzhou 450008,Henan,China;Henan Water Investment Xiaolangdi North Bank Irrigation Area Engineering Co.,Ltd.,Zhengzhou 450004,Henan,China)

机构地区：[1]河海大学水利水电学院,江苏南京210024 [2]河南省海河流域水利事务中心,河南新乡453005 [3]济南市水利建筑勘测设计研究院有限公司,山东济南250101 [4]河南水利与环境职业学院,河南郑州450008 [5]河南水投小浪底北岸灌区工程有限公司,河南郑州450004

出　　处：《水力发电》2024年第10期47-52,共6页Water Power

基　　金：中央高校基本科研业务费专项资金资助(B220204001)。

摘　　要：针对强降雨导致穿越土岩交界面处隧洞围岩变形问题,依托某灌区工程总干渠1号隧洞,采用流固耦合理论的数值模拟方法,对该部位隧洞变形问题进行了模拟,并分析了围岩不同弹性模量、不同黏聚力、不同摩擦角、不同土岩交界面产状等参数对围岩变形的影响。结果表明:强降雨是隧洞变形的主要原因;拱顶沉降对弹性模量变化更敏感,地表沉降对黏聚力变化更敏感;土岩交界面倾角的变化对降雨后的围岩和地表沉降影响很大,地表沉降从0°时的5.82 mm变化到60°的37.16 mm,拱顶沉降从0°时的15.77 mm变化到60°时的26.17 mm。研究成果可以为类似工程选线布置和施工控制措施实施提供借鉴。In view of the deformation of surrounding rock at the interface between soil and rock caused by heavy rainfall,relying on the No.1 tunnel of the main canal of an irrigation project,the numerical simulation method of fluid-solid coupling theory is used to simulate the deformation of the tunnel at this part,and the influence of parameters such as different elastic modulus,different cohesion,different friction angles and different soil-rock interface on the deformation of surrounding rock are analyzed.The results show that,(a)the heavy rainfall is the main cause of tunnel deformation;(b)the vault settlement is more sensitive to the change of elastic modulus,and the surface settlement is more sensitive to the change of cohesion;and(c)the change of inclination of soil-rock interface has a great influence on surrounding rock and surface settlement after rainfall,in which,the surface settlement changes from 5.82 mm at 0°to 37.16 mm at 60°,and the vault settlement changes from 15.77 mm at 0°to 26.17 mm at 60°.The research results can provide reference for route selection and construction control measures of similar projects.

关 键 词：隧洞 土岩复合地层 强降雨 围岩变形 数值模拟 

分 类 号：TU457[建筑科学—岩土工程]