| 注浆对开挖卸荷下既有地铁隧道竖向变形的影响 |
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| 引用本文： | 张强,杨成永,李洪泉,李冰.注浆对开挖卸荷下既有地铁隧道竖向变形的影响[J].北方交通大学学报,2011(1):92-95,102. |
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| 作者姓名： | 张强 杨成永 李洪泉 李冰 |
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| 作者单位： | [1]北京交通大学隧道及地下工程教育部工稃研究中心,北京100044 [2]内蒙古锡乌铁路有限责任公司,内蒙古锡林浩特026000 |
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| 基金项目： | 国家自然科学基金资助项目（50978020） |
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| 摘 要： | 以北京金融街地下交通工程为背景,采用FLAC3D数值分析软件,选择不同的注浆范围,对注浆上方开挖卸荷引起的既有地铁隧道竖向变形的影响进行了分析,结果表明,注浆能有效控制既有地铁隧道竖向变形.结合既有地铁隧道竖向变形控制标准,得到了合理的注浆范围,经与实测结果对比,数值计算结果与现场监测数据相吻合,保证了既有地铁线路行车安全,并且为实际工程节省了造价.
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| 关 键 词： | 既有地铁隧道 注浆范围 数值模拟 开挖卸荷 竖向变形 |
Influence of grouting on vertical deformation of underlying existing subway tunnel subjected to excavation unloading |
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| ZHANG Qiang,YANG Chengyong,LI Hongquan,LI Bing.Influence of grouting on vertical deformation of underlying existing subway tunnel subjected to excavation unloading[J].Journal of Northern Jiaotong University,2011(1):92-95,102. |
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| Authors: | ZHANG Qiang YANG Chengyong LI Hongquan LI Bing |
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| Institution: | 1.Tunnel and Underground Engineering Research Center of Ministry of Education,Beijing Jiaotong University,Beijing 100044,China;2.Inner Mongolia Xiwu Railway Co.,Ltd.,Xilinhot Inner Mongolia 026000,China) |
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| Abstract: | By means of the numerical simulation software FLAC3D,the influence of different grouting ranges on the vertical deformation of existing subway tunnel subjected to the excavation unloading above is analyzed,aiming at an example of the underground traffic engineering at Jinrongjie,Beijing.The results show that grouting can effectively control the vertical deformation of existing subway tunnel.After that,a recommended grouting range is derived out according to the vertical deformation control standard of existing subway tunnel.Finally,a comparison among analytical results with in-situ monitoring data is conducted.The numerical calculation results are in accordance with in-situ situation.It shows that the recommended range of grouting reinforcement is an effective method for ensuring safe running of railway and saving the cost of practical engineering. |
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| Keywords: | existing subway tunnel grouting range numerical simulation excavation unloading vertical deformation |
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