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Full-cycle dynamic monitoring method for deep foundation pit
A full-cycle dynamic monitoring method for a deep foundation pit comprises three steps of early monitoring arrangement, middle later excavation side wall stress detection and abnormal data identification, wherein monitoring points are arranged in the foundation pit arrangement full cycle and comprise the inner circle deformation monitoring points, the outer ring deformation monitoring points and the preset side wall monitoring points, and a BIM model database is built for dynamic comparison; and for each monitoring point, if the monitoring value acquired in the current round is within the 0.88-1.2-fold interval, a normal value is judged, and otherwise, an abnormal value is judged; and if the normal value is judged in the current round, the predicted mean value is iteratively updated. The method has the beneficial effects that the influence of the excavation of the foundation pit and the change of the environmental state parameter on the monitoring value is predicted to determine the predicted acquisition value of the next acquisition moment of the monitoring project, whether the actual value is abnormal or not is judged by comparing the predicted value with the actual value, real monitoring data are obtained, and important effects are achieved in the early warning process of the whole foundation pit excavation.
一种深基坑全周期动态监测方法，包括前期监测布置，中后期开挖侧壁应力检测和异常数据识别三个步骤，在基坑布置全周期布置监测点，包括内圈变形监测点、外圈变形监测点和预设侧壁监测点，以及通过建立BIM模型数据库动态对比；针对每一个监测点，若本轮采集的监测值在预测值的0.88‑1.2倍区间内，确认为正常值，否则判定为异常值；若本轮判定为正常值，则对预测的均值进行迭代更新。本发明的优点在于：通过预测基坑开挖及环境状态参数的变化对监测值的影响，来确定监测项目的下一采集时刻预测采集值，并通过比对预测值及实际值来判定实际值是否异常，得出真实的监测数据，在整个基坑开挖的预警过程中起到重要的作用。
Full-cycle dynamic monitoring method for deep foundation pit
A full-cycle dynamic monitoring method for a deep foundation pit comprises three steps of early monitoring arrangement, middle later excavation side wall stress detection and abnormal data identification, wherein monitoring points are arranged in the foundation pit arrangement full cycle and comprise the inner circle deformation monitoring points, the outer ring deformation monitoring points and the preset side wall monitoring points, and a BIM model database is built for dynamic comparison; and for each monitoring point, if the monitoring value acquired in the current round is within the 0.88-1.2-fold interval, a normal value is judged, and otherwise, an abnormal value is judged; and if the normal value is judged in the current round, the predicted mean value is iteratively updated. The method has the beneficial effects that the influence of the excavation of the foundation pit and the change of the environmental state parameter on the monitoring value is predicted to determine the predicted acquisition value of the next acquisition moment of the monitoring project, whether the actual value is abnormal or not is judged by comparing the predicted value with the actual value, real monitoring data are obtained, and important effects are achieved in the early warning process of the whole foundation pit excavation.
一种深基坑全周期动态监测方法，包括前期监测布置，中后期开挖侧壁应力检测和异常数据识别三个步骤，在基坑布置全周期布置监测点，包括内圈变形监测点、外圈变形监测点和预设侧壁监测点，以及通过建立BIM模型数据库动态对比；针对每一个监测点，若本轮采集的监测值在预测值的0.88‑1.2倍区间内，确认为正常值，否则判定为异常值；若本轮判定为正常值，则对预测的均值进行迭代更新。本发明的优点在于：通过预测基坑开挖及环境状态参数的变化对监测值的影响，来确定监测项目的下一采集时刻预测采集值，并通过比对预测值及实际值来判定实际值是否异常，得出真实的监测数据，在整个基坑开挖的预警过程中起到重要的作用。
Full-cycle dynamic monitoring method for deep foundation pit
一种深基坑全周期动态监测方法
ZHANG JIQING (author) / LIU YI (author) / SHAO HAIBO (author) / HOU ZHONGWEI (author) / LIU LIWEI (author) / WU ZHAOZHU (author) / GAO ZONGBIN (author) / GAO JUN (author)
2020-04-10
Patent
Electronic Resource
Chinese
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