刚性桩复合地基承载性能动静试验分析

Static and Dynamic Test Analysis of Bearing Capacity of Rigid Pile Composite Foundation

根据相似理论建立刚性桩复合地基群桩模型,测试其在静力作用下的变形特性、不同桩位桩体和桩间土的受力特性.静力试验表明:褥垫层能够调节桩-土荷载分担比,不同桩位桩身的应力,角桩最大,其次是边中桩,中桩最小.研究了在动力作用下刚性桩不同桩位的弯矩和剪力值随桩身分布的特性以及箱体的位移时程曲线.动力试验表明:无论是弯矩值还是剪力值都是角桩最大,其次是边桩,再次是中心桩;刚性桩复合地基具有良好的抗震性能.

According to similarity theory,this paper established rigid pile composite foundation pile group model.The deformation characteristics,force characteristics of piles and soil of rigid pile composite foundation are tested.Static test shows that： cushion can adjust pile-soil load share ratio,stress of different pile spacing pile.The biggest is the corner pile,next is the side pile,and the smallest is the center pile.And it studied distribution characteristics of the bending moment and shear value with pile and displacement time history of the flask.Dynamic test shows that： whether bending moment or shear is in investigation the biggest is the corner pile,next is the side pile,and the smallest is the center pile.It is concluded that rigid pile composite foundation has excellent seismic behavior.