软土地区深基坑承压水降水方案验证可行性研究  

Feasibility Study of Deep Foundation Pit Confined Water Dewatering Scheme Validation in Soft Soil Area

作　　者：王晓旭 刘世武 王张乾 许国涛 刘健 董毓庆 Wang Xiaoxu;Liu Shiwu;Wang Zhangqian;Xu Guotao;Liu Jian;Dong Yuqing(China Railway 19 Bureau Group Co.,Ltd,Beijing 100176,China;China Railway Construction Bridge Engineering Bureau Group Co.,Ltd,Tianjing 300300,China;Hangzhou Heyue Technology Co.,Ltd,Hangzhou 310015,China)

机构地区：[1]中铁十九局集团有限公司,北京100176 [2]中铁建大桥工程局集团有限公司,天津300300 [3]杭州合跃科技有限责任公司,杭州310015

出　　处：《科技通报》2022年第8期65-73,共9页Bulletin of Science and Technology

摘　　要：为了研究数值模拟验证软土地区深基坑承压水降水方案的可行性,本文采用三维有限差分法建立数值模型,对杭州地铁8号线青六路站基坑承压水降水方案进行验证,预测了因降水而引起的周边环境地面沉降数值,得出如下结论:(1)利用三维数值模型设计的青六路站基坑降水方案符合工程降水要求,说明数值模拟设计深基坑降水方案的可行性;(2)利用三维数值模型预测了基坑周围地面沉降值,只考虑承压水降水单因素对地面沉降的影响,与实际各点位沉降值相比,误差控制在0.07%~15.00%,可用于预测基坑工程承压水降水所引起的地面沉降,检验降水方案的合理性。In order to study the numerical simulation validation of deep foundation pit in soft soil area for feasibility of confined water precipitation,in this paper,three-dimensional finite difference method is adopted to establish the numerical model,of hangzhou metro line 8 green all stand confined water foundation pit precipitation scheme for validation,forecast the surrounding environment caused by precipitation and ground subsidence value,the following conclusions:(1) The foundation pit dewatering scheme of Qingliu Road station designed by using three-dimensional numerical model meets the requirements of engineering dewatering,indicating the feasibility of numerical simulation design of deep foundation pit dewatering scheme;(2) The three-dimensional numerical model is used to predict the ground settlement around the foundation pit.Only considering the impact of single factor of confined water precipitation on the ground settlement,compared with the actual settlement value at each point,the error is controlled within 0.07%~15.00%,which can be used to predict the ground settlement caused by confined water precipitation in foundation pit engineering and test the rationality of the precipitation scheme.

关 键 词：深基坑 承压水 数值模拟 降水方案验证 沉降预测 

分 类 号：TU43[建筑科学—岩土工程]