【作者】 姚钧天； 沈侃敏； 王宽君； 俞剑； 黄茂松；

【Author】 YAO Jun-tian;SHEN Kan-min;WANG Kuan-jun;YU Jian;HUANG Mao-song;Department of Geotechnical Engineering,Tongji University;PowerChina Huadong Engineering Corporation Limited;

【机构】 同济大学地下建筑与工程系； 中国电建集团华东勘测设计研究院有限公司；

【摘要】 大型风电站的集控中心通常建造于潮间带。为确保建筑的设计标高保持在水位以上,需要对原本的区域做填土处理。填土会导致地基长期沉降,在沉降过程中土体强度提高,但同时也会造成集控中心建筑物的桩基上产生负摩阻力。因此,在场地处于不同固结度进行桩基施工及在桩基施工后不同时间段桩基的极限承载力均会有所区别。为此,本研究结合试验以及流固耦合数值模拟,探究桩基在场地不同固结度下沉桩及其后继承载力随时间的演化规律,提出了一种简化确定桩基础中性点位置的方法,可以用于计算工程在不同固结度下沉桩桩基的极限承载力。更多还原

【Abstract】 The control centers of wind power plants are usually located in coastal tidal flat areas.To ensure the design elevation of the control centres is maintained above the water table,a thick fill will be placed on the original ground level.However,the filling would cause a long-term ground settlement and further lead to the development of the NSF(negative skin friction) of the pile foundations for the control centers.Therefore,pile bearing capacity will be different in different consolidation degrees of pile foundation construction and in different periods after pile foundation construction.Combined with experiments and fluid-solid coupling numerical simulation,this study explores the evolution law of pile bearing capacity during the whole consolidation period,A simplified method for determining the position of the neutral point of pile foundation is proposed,which can be used to calculate the ultimate bearing capacity of pile foundation under different consolidation degrees.更多还原