双排桩在荆州南国城市广场深基坑中的应用

Application of Double-row Piles in Deep Foundation Pit of Jingzhou South City Plaza

介绍了荆州地区工程地质特点及双排桩在该地区的应用背景,以荆州南国城市广场深基坑工程为对象,介绍了双排桩支护结构方案,运用有限元建立考虑桩土接触的三维空间模型,采用Druck-Prager模型对基坑开挖进行数值模拟,分析了开挖过程中基坑变形、桩顶位移及桩身弯矩特点,并与实际监测结果进行了对比分析。结果表明,数值模拟与实测结果较为接近,双排桩支护效果明显,该方案对双排桩在荆州城区的应用有较好的借鉴和推广意义。

The application background of double-row piles and the engineering geological characteristics in Jingzhou area is introduced,design plan of retaining structure with double-row piles is also introduced based on the deep foundation pit of Jingzhou South City Plaza,three-dimensional finite element model considering the pile soil contact is established,DruckPrager soil model is used,pit deformation,displacement and pile bending moment characteristics are analyzed based on the numerical simulation of foundation pit excavation,the numerical simulation value and the actual monitoring results are compared,the results show that the numerical simulation and measured results are closed,and double-row piles retaining effect is obvious,the engineering case provides reference of double-row piles in Jingzhou City and the techuique can be populcerized.