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围绕南昌绿地中央广场某深基坑工程开展研究。基于施工监测资料,分析了基坑周边道路沉降、TRD围护墙顶水平和垂直位移、TRD围护墙体水平位移、坑外地下水位变化以及钢筋混凝土支撑轴力变化等监测数据。结果表明,该深基坑工程对周边道路影响较小,在施工过程中TRD围护结构变形远低于报警值,地下水位变化平稳。分析发现,TRD围护结构具有良好的挡土和止水效果,在富水和渗透性强的砂性土地区具有推广应用价值。
Around Nanchang green square central square a deep foundation pit project to carry out research. Based on the construction monitoring data, the monitoring data such as the road settlement around the excavation, the horizontal and vertical displacements of the roof of the TRD enclosure, the horizontal displacement of the TRD enclosure wall, the change of the water table outside the pit and the axial force of the reinforced concrete support were analyzed. The results show that the deep foundation pit project has less influence on the surrounding roads. The deformation of the TRD enclosure structure is far below the alarm value during construction, and the groundwater level changes smoothly. The analysis shows that the TRD enclosure has good retaining and water stopping effects and has the value of popularization and application in sandy soil areas rich in water and permeability.