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高层建筑深基坑支护结构位移动态监测方法

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针对高层建筑深基坑支护结构位移监测时,位移轨迹、位移速率以及位移时间变化监测准确性较差问题,本文研究了高层建筑深基坑支护结构位移动态监测方法.对支护结构位移影响因素进行具体分析,生成了影响指标;再对基坑数据进行采集,建立数据集并进行降维处理;计算获取目标函数,结合影响指标建立时间序列模型,依据对模型的计算建立动态变量矩阵;通过对矩阵的计算获取动态监测数据的统计量,完成支护结构的动态监测.研究结果表明:运用该方法进行监测时,位移移动轨迹监测误差为 0.1,位移速率保持在 0.9 mm/d以下,且与实际位移速率基本一致,纵向位移量达到 202 mm,且与实际沉降量一致.本文方法能够有效应用于高层建筑深基坑支护结构的位移动态监测,为保障高层建筑的稳定性和安全性提供重要的技术支持.
Dynamic monitoring method for displacing deep foundation pit supporting structures in high-rise buildings
The monitoring accuracy of displacement trajectory,displacement rate,and displacement time change is poor when monitoring the displacement of deep foundation pit-supporting structures in high-rise buildings.To solve this problem,this study investigates a dynamic monitoring method for tracking displacement in such structures.The influencing factors of support structure displacement are comprehensively analyzed to identify key indices.Founda-tion pit data are then collected,and a dataset is created to reduce dimensionality.The objective function is calcu-lated,and a time series model is established by integrating the impact indices.A dynamic variable matrix is estab-lished on the basis of the model calculations.By analyzing the matrix,the statistics of the dynamic monitoring data are obtained,thereby completing the dynamic monitoring of the support structure.The experimental results show that the monitoring error of the displacement trajectory is 0.1.The displacement rate is kept below 0.9 mm/d,which is consistent with the actual rates.The longitudinal displacement reaches 202 mm,conforming to the actual settlement.This method can be effectively applied to the dynamic displacement monitoring of deep foundation pit-supporting structures in high-rise buildings.It also provides important technical support for ensuring the stability and safety of high-rise buildings.

high-rise buildingdeep foundation pitsupporting structuredisplacementdynamic monitoringin-fluencing factordata dimensionality reductionmonitoring method

王贵美、周建亮

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中国矿业大学 力学与土木工程学院,江苏 徐州 221116

泛城设计股份有限公司,浙江 杭州 310015

高层建筑 深基坑 支护结构 位移 动态监测 影响因素 数据降维 监测方法

国家自然科学基金面上项目教育部人文社会科学研究规划基金住建部项目

7217122419YJAZH1222021-S-048

2024

哈尔滨工程大学学报
哈尔滨工程大学

哈尔滨工程大学学报

CSTPCD北大核心
影响因子:0.655
ISSN:1006-7043
年,卷(期):2024.45(4)
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