预估深基坑开挖对周边建筑物影响的简化分析方法

Simplified analysis method for evaluating excavation-induced damage of adjacent buildings

提出了预估上海地区深基坑开挖对周边建筑物影响的简化分析方法。首先根据上海地区的大量工程实测数据提出了地表沉降曲线的预估方法并验证了其合理性;然后提出了预估基坑开挖引起的建筑物附加变形的计算方法;最后给出了根据角变量来评估基坑开挖对建筑物影响程度的评判标准。具体工程实例给出了应用简化分析方法的详细流程,验证结果表明该方法能较好地预测基坑开挖对周边建筑物的影响。

A simplified analysis method is proposed to evaluate excavation-induced damage of buildings.Firstly,the method of predicting ground surface settlement profile is proposed based on a large number of monitored data of deep excavations in Shanghai soft ground.It is proved that this method is suitable for estimating ground surface settlement.Secondly,a calculation method of additional deformation of adjacent buildings is proposed.Thirdly,the criteria are proposed for evaluating damage of buildings according to angular distortion.A case history is presented to illustrate the detailed procedures of adopting the simplified analysis method.It is shown that the results obtained by the simplified analysis method agree with the monitoring data.