长短桩高强复合地基在高层建筑中的应用  

Application of long and short piles high strength composite foundation to high-rise building

作　　者：林本海[1,2] 方辉[3] 

机构地区：[1]广州大学土木工程学院,广州510006 [2]广州大学地下工程与地质灾害研究中心,广州510006 [3]中交上海港湾工程设计研究院有限公司,上海200032

出　　处：《岩土力学》2009年第S2期302-307,共6页Rock and Soil Mechanics

摘　　要：长短桩高强复合地基能充分调动桩间土体参与工作,并在竖向方向上的刚度梯度变化与附加荷载的应力扩散变化趋势相同。以考虑不同桩体长度、桩体刚度和考虑周围多层土体分布的长短桩相互作用计算模型为依据,对某高层建筑进行长短桩高强复合地基的分析设计计算,通过与实测数据对比,表明长短桩高强复合地基应用于高层建筑可以满足承载力和沉降的要求。长短桩高强复合地基因其高承载力、经济性优越和施工灵活并工期短的特点,将会成为高层建筑桩基础的巨大挑战。The inter-pile soil can be fully mobilize to participate in the work of load-sharing and vertical rigidity change in the trend be the same with the additional load stress dispersion changes under the action of long and short piles high strength composite foundation.Based on the calculation model of long and short piles composite foundation considering different lengths of piles,different stiffness of piles and soil layer distribution around the pile,long and short piles high strength composite foundation of high-rise building can be calculated and analyzed;through a case study,it is shown that the long and short piles high strength composite foundation can meet the requirements of the bearing capacity and settlemen of high-rise buildings.The high-rise construction pile foundation will face enormous challenges,because of its high bearing capacity,economic superiority,flexible construction and short construction period.

关 键 词：长短桩高强复合地基 高层建筑 相互作用 剪切位移法 

分 类 号：TU473.1[建筑科学—结构工程]