摘要
以国道310函谷关隧道下穿引水暗渠为工程背景,利用高密度电法和大地电磁法在地表探测水渠渗透点及渗透通道,下穿暗渠前通过超前地质预报对地表探测结果进行验证,地表探测及超前地质预报结果均表明暗渠无渗漏水,为配合施工,运用MIDAS建立了湿陷性黄土隧道浅埋暗挖下穿暗渠模型,进一步对隧道下穿施工期间暗渠的变形特征与稳定性进行评估。由此得出下穿暗渠施工所引起的位移、应力应变及塑性区的分布,模拟结果可为暗渠处理及隧道加固提供依据,后续实践表明依据数值模拟指导施工可有效控制隧道下穿过程中周边的土体变形,确保了隧道的稳定性及引水暗渠的安全。
Based on the engineering background of the Hangu pass Tunnel underpass the culver of National Highway 310,Used the High-density electrical method and Magnetotelluric method probed the canal penetration point and penetration passageway,through the Advance geological prediction Validation the detection results before construction of Underpass diversion culvert,both the results of surface detection and advanced geological prediction show that there is no water leakage in the culvert.In order to cooperate with the construction,MIDAS was used to establish the model of shallow buried and underground excavation of collapsible loess tunnel under the culvert,and further evaluate the deformation characteristics and stability of the culvert during the tunnel underpass construction.Thus,the distribution of displacement,stress and strain and plastic zone caused by the construction of Underpass culvert was obtained,The simulation results can provide a basis for the treatment of culvert and the reinforcement of tunnel,The follow-up practice shows that the deformation of surrounding soil can be effectively controlled under the guidance of numerical simulation,The stability of the tunnel and the safety of the diversion culvert are ensured.
作者
牛彦平
高宇甲
王文章
汪显庭
孟旭
金钺寒
NIU Yanping;GAO Yujia;WANG Wenzhang;WANG Xianting;MENG Xu;JIN Yuehan(The Fourth Construction Co.,Ltd.of CSCES 7th Division,Xi’an 710016,China)
出处
《建筑结构》
CSCD
北大核心
2021年第S01期2333-2339,共7页
Building Structure
关键词
湿陷性黄土
下穿暗渠
地表探测
数值模拟
collapsible loess
underpass the culver
surface detection
numerical simulation
作者简介
牛彦平,学士,助理工程师,二级结构BIM工程师,Email:1391712843@qq.com。
