常州城区承压水影响下基坑抗突涌稳定性判定  

Judgment of anti-surge stability of foundation pit under the influence of confined water in Changzhou urban area

作　　者：李雄威 郭严伟[2] 何亮 黄开林 秦羽[3] LI Xiongwei;GUO Yanwei;HE Liang;HUANG Kailin;QIN Yu(Changzhou Vocational Institute of Engineering,Changzhou 213164,China;School of Environmental and Safety Engineering,Changzhou University,Changzhou 213164,China;School of Civil Engineering&Architecture,Changzhou Institute of Technology,Changzhou 213002,China)

机构地区：[1]常州工程职业技术学院,常州213164 [2]常州大学环境与安全工程学院,常州213164 [3]常州工学院土木建筑工程学院,常州213002

出　　处：《建筑结构》2024年第4期67-72,共6页Building Structure

基　　金：江苏省第五期“333工程”培养资金(BRA2016113);新时代职业学校名师(名匠)名校长培养计划(2023—2025年)名师(名匠)培养对象项目;江苏省职业教育“双师型”名师工作室项目。

摘　　要：以常州地铁2号线青枫公园站深基坑工程为例,通过有限元软件建立承压水条件下基坑开挖计算模型。利用数值模拟方法研究承压水条件下基坑稳定性及周围环境变形影响,将数值计算结果与基坑抗突涌理论判定计算结果进行对比得到合理的基坑抗突涌隔水层临界厚度值。结果表明:传统的基坑抗突涌压力平衡判别法计算得到的隔水层临界厚度值偏大,而基于强度破坏的数值模拟判别法得到的隔水层临界厚度值偏小,基于变形控制的基坑突涌数值模拟判别标准得到的隔水层临界厚度值较合理。The deep foundation pit project of Qingfeng Park station of Changzhou Metro Line 2 is taken as an example,the calculation model of foundation pit excavation under confined water conditions was established by finite element software.The numerical simulation method was used to study the stability of the foundation pit under the confined water and the influence of the surrounding environment deformation.The numerical calculation results were compared with the calculation results of the theoretical anti-surge of the foundation pit to obtain a reasonable critical thickness value of the aquifer for the foundation pit anti-surge.The results show that the critical thickness value of the aquifer calculated by the traditional method for the determination of the anti-surge pressure balance of the foundation pit is too large,while the critical thickness value of the aquifer obtained by the numerical simulation based on the strength failure is too small,the critical thickness value of the aquifer obtained by the numerical simulation criterion of foundation pit surge based on defomation control is reasonable.

关 键 词：基坑开挖 基坑抗突涌 承压水 稳定性 隔水层厚度 

分 类 号：TU463[建筑科学—结构工程]