随着我国城市建设的发展,软土地区的深基坑工程设计与施工面临越来越复杂的环境条件,基坑施工对环境影响的控制要求也越来越严格,基坑工程已进入已变形控制设计与施工为主的时代。结合天津软土地区的工程实践及国内其他地区经验,将基坑工程的全过程划分为基坑支护结构施工、基坑降水、基坑开挖、基坑使用、拆除支撑、地下水位恢复等6个阶段,分析了施工全过程各个阶段可能产生的稳定与变形机理、危害及控制方法。
With the development of urban construction in China,environment conditions of design and construction of deep foundation excavation in soft soil is getting more complex,and control requirements for influence of foundation excavation on environment is getting more strict.Based on engineering practice,process of excavation construction is divided into six stages as construction of retaining structures,foundation excavation dewatering,excavation,service stage,demolition of support and groundwater level recovery.Stability and deformation mechanism and harmfulness and countermeasures in each stage are analyzed.