竖向荷载下斜坡桩基承载力及影响因素数值研究  

Numerical Simulation for Vertical Ultimate Capacity and Influencing Factors of Oblique Slope Pile under Vertical Loads

作　　者：程刘勇[1] 陈善雄[1] 余飞[1] 许锡昌[1] 李剑[1] 秦尚林[1] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071

出　　处：《科学技术与工程》2013年第18期5399-5403,5422,共6页Science Technology and Engineering

基　　金：国家自然科学基金项目(51079142);湖北省电力勘测设计院科技项目资助

摘　　要：利用有限差分软件FLAC3D,开展了竖向荷载下斜坡桩基极限承载力研究。分析了斜坡桩基竖向极限承载力的变化规律及其影响因素。并与平地桩基进行对比,分析了斜坡的存在对承载力的影响。最后给出了斜坡与平地桩基极限承载力比值工程应用表。研究表明:斜坡桩基极限承载力与临坡距呈正比关系,临坡距越大,极限承载力越高;与坡度呈反比关系,坡度越小,极限承载力越大。提出了一种斜坡桩基竖向极限承载力实用计算方法:实际工程中,可以先按传统的设计计算方法确定平地桩基的承载力,然后根据实际坡度和临坡距离,采用插值的方法在比值表中取相应的调整系数,确定斜坡桩基的承载力。By using the finite-difference software FLAC 3D,the vertical ultimate bearing capacity of oblique slope pile is studied.And its change law and influence factors are analyzed also.Then it are with the ground pile and the influence of existing slope on the bearing capacity is analyzed.At last the ratio table of limit bearing capacities for the oblique slope pile and the pile on the ground are made.Research shows that the distance is proportional to the ultimate bearing capacity of the oblique slope pile.As slope distance is greater,the ultimate bearing capacity is higher.But the inverse relation with slope,when slope is smaller,the ultimate bearing capacity is the greater.A practical calculation method for the vertical ultimate bearing capacity of oblique slope pile is put forward.In the practical engineering,the bearing capacity of the plain pile foundation can be determined by the conventional designed calculation method,and then the ultimate bearing capacity of oblique slope pile are determined according to the actual slope and the slope distance by the interpolation methods with the adjustment coefficients in the ratio table.

关 键 词：斜坡桩基 极限承载力 数值模拟 FALC3D 

分 类 号：TU432[建筑科学—岩土工程]