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彭   伟

（ 陕西铁路工程职业技术学院 ，陕西 渭南 714000)

摘   要： 为有效掌握基坑沉降变形规律 ，以基坑所处地质条件为基础 ，先结合有效应力原理 ，利用分层综 合法计算基坑降水引发的沉降理论值； 其次 ，再以基坑施工过程中的现场沉降监测数据为基础 ，通过变形预测 来佐证理论计算值的准确性 。分析结果表明： 在基坑沉降的理论计算结果中 ，沉降理论计算值均不同程度的小 于沉降监测值 ，且随着与降水井中心距离的增加 ，沉降值具持续减小特征； 在基坑沉降的预测研究结果中 ，所得预测结果的相对误差均值2. 02% ~ 2. 09% , 说明 ILSO-RVM-CT 在基坑沉降变形预测中具有较强的预测能力 ，且预测结果显示基坑沉降变形后续还会具小速率增加特征 ，说明基坑沉降变形趋于稳定。 

关键词： 基坑； 降水； 沉降理论计算； 变形预测

中图分类号： TU470      

文献标志码： A      

文章编号： 1005-8249 (2024) 01-0100-07

DOI : 10. 19860/j.cnki.issn1005-8249.2024.01.018

 

 

PENG Wei

( Shaanxi Railway Engineering Vocational and Technical Couage , Weinan 714000 , China)

Abstract: To effectively grasp the deformation law of foundation pit settlement, based on the geological conditions of the foundation pit, combined with the principle of effective stress, the layered comprehensive method is used to calculate the theoretical value of settlement caused by foundation pit precipitation; Secondly, based on the on-site settlement monitoring data during the excavation construction process, the accuracy of the oretical calculation values is supported by deformation prediction. The analysis results show that in the the oretical calculation results of foundation pit settlement, the settlement theoretical calculation values are to varying degrees smaller than the settlement monitoring values, and the settlement values have a continuous decreasing characteristic as the distance from the center of the drainage well increases; In the research results of predicting foundation pit settlement, the average relative error of the predicted results is between 2.02% and 2.09%, indicating that ILSO-RVM-CT has strong predictive ability in predicting foundation pit settlement deformation, and the prediction results show that the settlement deformation of foundation pit will continue to increase at a small rate, indicating that the settlement deformation of foundation pit tends to be stable.

Keywords: excavation dewatering; theoretical calculations; on site monitoring; deformation prediction

∗ 基 金 项 目： 陕 西 铁 路 工 程 职 业 技 术 学 院 科 研 基 金 ( KY2022-09) 。

作者简介： 彭伟  ( 1983—) , 男 ，本科 ，讲师 ，主要研究方向： 土建类工程施工教学和管理。

收稿日期： 2023-08-14