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Error analysis method for measuring horizontal displacement of deep layer of foundation pit by tilt angle sensor
The invention discloses an error analysis method for measuring horizontal displacement of a deep layer of a foundation pit by a tilt angle sensor. The error analysis method comprises the following steps: performing software simulation calculation on deformation in the excavation process of the foundation pit to obtain a theoretical deflection value Yi; equally dividing the foundation pit into n sections, and arranging a tilt angle sensor at the midpoint of each section of the foundation pit; superposing the deflection value of each section of region by adopting a segmented superposition method to obtain a deflection calculation value yi, and calculating a segmentation error; performing s times of deflection simulation measurement on each tilt angle sensor by adopting a Monte Carlo method; selecting the tilt angle sensors with different segment numbers n and different measurement precisions delta D and combining pairwise to obtain a 95% confidence absolute error interval and a 95% confidence relative error interval. According to the method, segmentation errors generated by replacing curves with segmented straight lines and measurement errors of the tilt angle sensors are analyzed, the arrangement scheme of the tilt angle sensors is determined for foundation pits with different depths, and theoretical guidance is provided for arrangement of deep horizontal displacement measurement points.
本发明公开一种倾角传感器测量基坑深层水平位移的误差分析方法，包括对基坑开挖过程中的变形量进行软件模拟计算得到挠度理论值Yi；将基坑等分为n段，并在每段基坑的中点布置倾角传感器；采用分段叠加法对每段区域的挠度值进行叠加得到挠度计算值yi，计算出分段误差；采用蒙特卡罗法对每个倾角传感器进行s次挠度模拟测量；选用不同分段数n和不同测量精度δD的倾角传感器进行两两组合，得出95％置信度绝对误差区间以及95％置信度相对误差区间。本发明分别对分段直线代替曲线产生的分段误差以及倾角传感器本身的测量误差进行分析，针对不同深度的基坑，确定倾角传感器的布置方案，为深层水平位移测点布置提供理论指导。
Error analysis method for measuring horizontal displacement of deep layer of foundation pit by tilt angle sensor
The invention discloses an error analysis method for measuring horizontal displacement of a deep layer of a foundation pit by a tilt angle sensor. The error analysis method comprises the following steps: performing software simulation calculation on deformation in the excavation process of the foundation pit to obtain a theoretical deflection value Yi; equally dividing the foundation pit into n sections, and arranging a tilt angle sensor at the midpoint of each section of the foundation pit; superposing the deflection value of each section of region by adopting a segmented superposition method to obtain a deflection calculation value yi, and calculating a segmentation error; performing s times of deflection simulation measurement on each tilt angle sensor by adopting a Monte Carlo method; selecting the tilt angle sensors with different segment numbers n and different measurement precisions delta D and combining pairwise to obtain a 95% confidence absolute error interval and a 95% confidence relative error interval. According to the method, segmentation errors generated by replacing curves with segmented straight lines and measurement errors of the tilt angle sensors are analyzed, the arrangement scheme of the tilt angle sensors is determined for foundation pits with different depths, and theoretical guidance is provided for arrangement of deep horizontal displacement measurement points.
本发明公开一种倾角传感器测量基坑深层水平位移的误差分析方法，包括对基坑开挖过程中的变形量进行软件模拟计算得到挠度理论值Yi；将基坑等分为n段，并在每段基坑的中点布置倾角传感器；采用分段叠加法对每段区域的挠度值进行叠加得到挠度计算值yi，计算出分段误差；采用蒙特卡罗法对每个倾角传感器进行s次挠度模拟测量；选用不同分段数n和不同测量精度δD的倾角传感器进行两两组合，得出95％置信度绝对误差区间以及95％置信度相对误差区间。本发明分别对分段直线代替曲线产生的分段误差以及倾角传感器本身的测量误差进行分析，针对不同深度的基坑，确定倾角传感器的布置方案，为深层水平位移测点布置提供理论指导。
Error analysis method for measuring horizontal displacement of deep layer of foundation pit by tilt angle sensor
倾角传感器测量基坑深层水平位移的误差分析方法
XU YUFENG (author) / LI YIMING (author) / GUO FENTAO (author) / CHEN ZHAOSHUAN (author)
2021-06-29
Patent
Electronic Resource
Chinese
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