深基坑地下水位变化及土体应力分布研究  

Research on Changes in Groundwater Level and Distribution of Soil Stress in Deep Foundation Pits

作　　者：马启锐 MA Qirui(China Railway Construction Group Co.,Ltd.Huazhong Construction Co.,Ltd.,Zhengzhou Henan 450000,China)

机构地区：[1]中铁建设集团有限公司华中建设有限公司,河南郑州450000

出　　处：《北方建筑》2025年第1期74-78,共5页Northern Architecture

摘　　要：深基坑支护与降水是保障基坑稳定的关键技术。本文以中车四方智汇港一期项目为例,明确了支护降水过程中地下水位时序变化特征及稳定时间,结合实测数据论述了不同深度基坑土压力分布模型。结果表明地下水位呈现三个显著阶段,分为波动期、下降期和稳定期。地下水渗透通过改变土体有效应力影响基坑边坡滑裂面的剪切强度和土压力分布形式。土压力的分布呈现典型的非线性“鼓形”特性,且随着基坑深度增加,土压力不断增加。该结论为基坑降水施工和稳定性评估提供了理论基础和施工技术参考。Deep foundation pit support and dewatering is key technologies to ensure the stability of foundation pits.This article takes the CRRC Sifang Zhihui Port Phase I project as an example to clarify the temporal characteristics and stability time of groundwater level changes during the support dewatering process.Combined with measured data,the distribution model of soil pressure in different depths of foundation pits is discussed.The results show that the groundwater level presents three significant stages,which are fluctuation period,decline period and stable period.Groundwater infiltration affects the shear strength and soil pressure distribution of the sliding surface of the excavation slope by altering the effective stress of the soil.The distribution of soil pressure exhibits a typical nonlinear“drum shaped”characteristic,and as the depth of the foundation pit increases,the soil pressure continues to increase.This conclusion provides a theoretical basis and construction technology reference for foundation pit dewatering construction and stability assessment.

关 键 词：高层建筑 深基坑支护 降水施工 土体应力 

分 类 号：TU432[建筑科学—岩土工程]