复杂周边环境下深基坑的开挖变形监测研究

Research on excavation deformation monitoring of deep foundation pit in complex surrounding environment

深基坑开挖支护过程开挖具备时空效应,即在深基坑开挖及支护时,每次开挖土体的尺寸大小和被开挖后基坑处于无支护状态的时间均与周围围护结构、基坑周围土层位移存在相互联系。基于此,文章对该基坑施工过程中桩体结构受力及周边已有建筑物的沉降进行了监测研究,探讨了基坑开挖顺序对基坑变形的影响,深入分析了开挖过程中的基坑变形规律,为后期相似工程提供一定的施工经验。

In the process of deep foundation pit excavation and support,the excavation has a spatio-temporal effect,that is,during the excavation and support of deep foundation pit,the size of soil mass excavated each time and the time of excavation without support are interrelated with the surrounding enclosure structure and the displacement of soil layer around the foundation pit.Based on this,this paper monitors and studies the force of pile structure and the settlement of surrounding buildings in the construction process of the foundation pit,discusses the influence of the excavation sequence on the foundation pit deformation,analyzes the foundation pit deformation law in the excavation process,and provides certain construction experience for similar projects in the later period.