深基坑降水对周边建筑环境影响的研究

Study on Influence of Dewatering of Deep Foundation Pit on Surrounding Building Environment

使用传统模型研究深基坑降水对周边建筑环境影响时研究分析效果差。为此对深基坑降水对周边建筑环境的影响进行研究。引入持水重度、相关密度指标、给水度等概念,计算土层持水密度;采用分层总和法,将周边建筑环境土层分为潜水含水层、承压含水层、隔水层、半承压含水系统四部分,代入计算出的土层持水密度,分析土层应力增量;在土层应力增量分析的基础上,运用FLAC方法计算基坑降水引起的地面沉降程度,实现深基坑降水对周边建筑环境影响的研究,完成影响研究模型的设计。

Traditional model for studying the influence of deep foundation pit dewatering on surrounding building environment shows poor research and analysis results. Therefore, the influence of deep foundation pit dewatering on surrounding building environment is studied. The water holding density of soil layer is calculated by introducing the concepts of heavy water holding capacity, relative density index and water supply degree. The surrounding soil layer is divided into four parts: water aquifer, pressure aquifer, water barrier and half bearing water bearing system by stratified summation method. The soil stratum water holding density is calculated and the stress increment of soil layer is analyzed. Based on the analysis of soil stress increment, the FLAC method is used to calculate the ground subsidence caused by the dewatering of the foundation pit. The influence of the deep foundation pit precipitation on the surrounding building environment is studied, and the design of the influence research model is completed.