组合支护结构下土钉内力监测的回归分析

Regression analysis on internal force monitoring of soil nailing in combined excavation

侨福花园广场深基坑工程基坑深达21.675m,采用上部复合土钉墙、下部地下连续墙的组合支护体系,按照信息化施工要求对土钉内力进行了长时间监测,根据监测曲线,运用回归分析方法建立了土钉内力非线性回归模型,得出了土钉内力与时间的相互关系,并得到了分别适合于中短期以及中长期土钉内力与时间相互关系的较为理想的回归函数。监测结果和数据分析表明,土钉内力监测中应用回归分析是完全可行的,有助于提高深基坑工程领域信息化施工的准确性和预见性。

The depth of Qiaofu Garden Plaza deep excavation is 21.675m, and the supporting form is soil nailing, ground anchor and diaphragm wall. Regression models have been made according to the monitoring figure of internal force of soil nailing in a combined deep excavation work, and the interrelation of the soil nailing internal force with the time has been obtained. From the analysis, two better regression models are found which are suitable separately for short term and long term. It shows that the optimal regression function can fit text data finely and forecast soil nailing internal force, and regression analysis is available in the monitoring of the soil nailing internal force and can enhance predictability and veracity of information construction in deep excavation works.