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介绍了基坑桩体深部水平位移的量测原理与技术,以大连地铁海事大学车站基坑施工桩体水平位移为背景,在基坑四边建立了26个桩体深部水平位移的监控量测测站,运用TFL-CCX-D1移动式测斜仪进行了为期10个月现场监测,得出了桩体在基坑降水、开挖、架设支撑及主体结构施工过程中的水平位移变化规律,桩体最大水平位移符合相关规范要求,保证了基坑施工的安全性。同时指出了桩体水平位移监测是基坑信息化施工的关键性指标,特别是在基坑开挖期间,桩体水平位移是全部位移的60%~80%,钢支撑对基坑壁水平位移具有显著的控制作用。
This paper introduces the principle and technology of measuring the horizontal displacement of the deep foundation piles. Based on the horizontal displacement of the foundation pit of Dalian Subway University of Marine Science and Technology, 26 monitoring levels of deep horizontal displacement of the piles are established on four sides of the foundation pit Station, the use of TFL-CCX-D1 mobile inclinometer for a period of 10 months on-site monitoring, obtained in the foundation pit dewatering, excavation, erection support and the main structure of the process of horizontal displacement changes, the pile The maximum horizontal displacement of the body conforms to relevant specifications and guarantees the safety of foundation pit construction. At the same time, it is pointed out that the horizontal displacement monitoring of piles is the key index for the construction of pit information. Especially during the excavation of the foundation pit, the horizontal displacement of the pile is 60% -80% of the total displacement. The horizontal displacement of the steel support to the foundation pit wall Has a significant control.