| 地铁联络线开挖围护结构二次变形及监测方法研究 |
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| 引用本文： | 黄江华,张世华,王烨晟,魏云峰.地铁联络线开挖围护结构二次变形及监测方法研究[J].路基工程,2016,0(3):130-134. |
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| 作者姓名： | 黄江华 张世华 王烨晟 魏云峰 |
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| 作者单位： | 浙江华东工程安全技术有限公司, 杭州 310014 |
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| 摘 要： | 地铁换乘车站联络线的开挖一般需要先破除附属基坑垫层,然后进行土方开挖,该过程将引起临近围护结构的二次变形。通过在附属基坑底板和围护结构侧墙上布置收敛监测点,并采用激光测距仪进行监测,可有效监控围护结构的变形,以弥补附属基坑围护墙上测斜孔数量不足的劣势。通过某地铁车站附属基坑联络线开挖实例,验证了该方法的有效性。
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| 关 键 词： | 地铁联络线 收敛监测点 激光测距仪 二次变形 |
| 收稿时间： | 2019-11-07 |
Research on Secondary Deformation and Monitoring Method of Excavation Retaining Structure of Metro Connecting Line |
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| Abstract: | Generally, the connecting line excavation of transfer station needs to get rid of the subsidiary foundation pit cushion first, and then proceed to earth excavation; the process will cause secondary deformation of retaining structure nearby. Through the arrangement of convergence observation point on the subsidiary pit floor and the ground wall sidewalls, we can monitor the increment of horizontal displacement by laser range finder, it can effectively monitor the secondary deformation of retaining structure which can make up the disadvantage of insufficient inclinometer hole on the auxiliary foundation pit support wall. The validity of such method is verified in connecting line excavation of a subway station. |
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