排桩在横向荷载作用下变形特性分析

Analysis on deformation of row piles under horizontal loads

排桩在基坑支护、边坡抗滑和堤岸加固等工程中的应用越来越广,但实际工程中对承受横向荷载的排桩的受力变形特性缺乏足够的认识和完善成熟的计算方法。本文结合一个排桩支护的基坑工程,进行了现场监测、室内试验、二维和三维有限元模拟以及弹性反力法m法计算。研究了排桩受力变形的时间效应和空间效应,并详细分析了排桩的桩身变形规律,对比二维和三维有限元模拟以及弹性反力法计算结果,分析了三维有限元模拟的优越性。

Row piles have been more and more widely used in projects,such as pit supporting,slope retaining and bank reinforcement.However,the deformation characteristics of row piles have not been recognized thoroughly,and the designing of row piles is still lack of perfect calculation method.Field observation,laboratory test,two-dimensional and three-dimensional finite element method（FEM） simulation,and calculation with ＂m＂ method are conducted based on a pit project braced by row piles.The time effect,spatial effect,and deformation law of row piles are studied and analyzed in detail on the basis of three-dimensional FEM calculation.Compared with two-dimensional FEM and ＂m＂ method,three-dimensional FEM simulation agrees best with the filed observation.