在线式测斜系统在城际铁路深基坑监测中的应用研究

Application Research of Online Inclinometer System in Deep Foundation Pit Monitoring of Inter-City Rail

摘要: 传统的深基坑围护结构水平位移监测通常使用测斜仪人工采集数据，存在监测频率低、数据反馈慢且易受外界因素影响等缺点。本文介绍了在线式测斜系统的工作原理和系统组成，阐述了其在深圳某城际铁路车站主体基坑监测的应用情况。结果表明，在线式测斜系统可以实现监测数据的自动采集、传输及处理，实时提供监测成果并绘制变形曲线，成果可真实反映基坑围护结构的位移情况，监测精度能够满足施工监测的需求。人工监测点和在线式测斜监测点的深层水平累计位移曲线具有较好的相关性，均能准确及时地反映不同工况条件下引起的基坑水平位移。

Abstract: The traditional horizontal displacement monitoring of deep foundation pit retaining structures usually uses inclinometers to manually collect data, which has drawbacks such as low monitoring frequency, slow data feedback, and susceptibility to external factors. This paper introduces the working principle and system composition of the online inclinometer system, and expounds on its application in the monitoring of the main foundation pit of an Inter-city rail station in Shenzhen. The results show that the online inclinometer system can achieve automatic collection, transmis-sion, and processing of monitoring data, provide real-time monitoring results and draw deformation curves, and the results can truly reflect the displacement of the foundation pit retaining structure. The monitoring accuracy can meet the needs of construction monitoring. The deep horizontal cu-mulative displacement curves of manual monitoring points and online inclination monitoring points have good correlation, and can accurately and timely reflect the horizontal displacement of the foundation pit caused by different working conditions.