摘要
山区地质构造复杂,难免穿越复杂地层,此类地层强度和稳定性较低,往往对隧道围岩变形起着决定作用。以宝鼎2号特长公路隧道为依托,基于数值模拟和现场监测数据,分析隧道穿越断层及煤层时围岩的变形规律。结果表明:隧道穿越断层及煤层时,拱顶、拱腰、仰拱处的位移都发生突变,最终位移值皆远大于不含断层及煤层处的围岩,且不同空间位置的煤层对围岩变形的影响不同,与隧道轴线相交的煤层对隧道拱顶、拱腰、仰拱位移都有明显影响,而只处在隧道上方的煤层,仅对隧道拱顶的位移有影响,对拱腰和仰拱位移影响很小。
The geological structure of the mountainous area is complex,and it is inevitable that the complex formation is low,and the intensity and stability of such stratum are often determined to determine the deformation of the tunnel surrounding rock.Based on the actual project the special highway tunnel of Baoding No.2,numerical simulation and on-site monitoring data,the deformation rules of surrounding rocks in the tunnel through fault and coal seam was analyzed.The research results show that when the tunnel passes through faults and coal seams,the displacements of vault,arch waist and inverted arch all change suddenly,and the final displacement values are much larger than those of surrounding rock without faults and coal seams.Coal seams in different spatial positions have different influences on the deformation of surrounding rock.Coal seams intersecting with the tunnel axis have obvious influences on the displacement of tunnel vault,arch waist and inverted arch,while coal seams only above the tunnel only have influence on the displacement of tunnel vault,but have little influence on the displacement of arch waist and inverted arch.
作者
康海波
熊维林
赵刚应
万志强
KANG Hai-bo;XIONG Wei-lin;ZHAO Gang-ying;WAN Zhi-qiang(Highway Tunnel Branch of Sichuan Highway and Bridge Construction Group Co., Ltd., Chengdu 610200, China;School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;School of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 610031, China)
出处
《科学技术与工程》
北大核心
2021年第30期13148-13154,共7页
Science Technology and Engineering
基金
四川省科技计划重点研发项目(2017SZ0043)。
关键词
公路隧道
数值模拟
断层
煤层
围岩变形
highway tunnel
numerical calculation
the fault
coal seam
surrounding
rock deformation
