大型泵站施工过程中基坑监测及支护结构受力分析

Foundation Pit Monitoring and Support Structure Stress Analysis During Construction of Large Pumping Stations

为确保深基坑开挖的安全,采用动态监测和信息化施工。通过分析地下连续墙的变形、锚杆拉力、内支撑轴力等监测数据,发现天气、堆载、夹具松弛等会引起监测值偏离计算值,恶劣天气也会造成土体剪切指标的下降。建议设计阶段应预留足够的安全系数,并采用折减后的剪切指标后复核各项安全系数。

To ensure the safety of deep foundation pit excavation,dynamic monitoring and information-based construction are employed.By analyzing monitoring data,including diaphragm wall deformation,anchor rod tension,and internal support axial force,it is found that weather conditions,loading,and clamp relaxation can lead to deviations between monitored values and calculated values.Additionally,adverse weather conditions may decrease the soil shear index.Thus,it is recommended to allocate generous safety margins during the design stage and use the reduced shear index to assess various safety factors.