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预埋式多点位移计现场确定围岩松动圈的方法研究

Study on the Method to Define the Wall Rocks Loose Zone with Embedded Displacement Meter

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【Author】 LIU Hou-xiang~(1,2),FANG Feng-hua~2(1.Institute of Geotechnical Engineering,Xi’an University of Technology,Xi’an 710048,Shanxi,China;2.Institute of Geotechnical Engineering,Changsha University of Science and Technology,Changsha 410076,Hunan,China)

【机构】西安理工大学岩土工程研究所；长沙理工大学岩土工程研究所陕西西安710048；长沙理工大学岩土工程研究所；湖南长沙410076；

【摘要】根据沪蓉西高速公路龙潭隧道中预埋式多点位移计的现场监测工作实践,提出了多点位移计确定围岩松动圈的现场量测及判别方法,并对开挖后的隧道围岩变形进行了有限元数值模拟。实践证明,根据围岩内变形量与时间的变化关系并结合累积变形量随径向位移的变化规律及测点径向埋设位置,是确定围岩松动圈范围的有效方法。更多还原

【Abstract】 Based on the practice of the embedded displacement meter in Longtan tunnel,which is located on the HuRongxi express highway,a method of defining the loosen range of surrounding rock with the displacement meter is presented,and the distortion of the surrounding rock with FEM is simulated.Practice proves that the radial displacement which is based on the relationship between distortion value and time of the surrounding rock,combining with rule of accumulative distortion value changing with radial distortion is a feasible and reasonable method to estimate the loosen range of surrounding rock.更多还原

【关键词】围岩松动圈；量测方法；多点位移计；径向位移；
【Key words】 loose range of surrounding rock； measuring method； displacement meter； radial displacement；

【基金】湖南省自然科学基金(03JJY3078,04JJ40032);湖南省教育厅资助重点科研项目(03A006);长沙理工大学基金项目(30007)资助课题

【文献出处】矿冶工程 ,Mining and Metallurgical Engineering , 编辑部邮箱 ,2006年01期

【分类号】U451.2
【被引频次】39
【下载频次】753

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