桩-土-承台共同作用的简化分析方法  

Simplified analytical method for pile-soil-cap interaction

作　　者：王浩[1] 周健[2] 邓志辉 

机构地区：[1]上海市政工程设计研究总院地下空间院,上海200092 [2]同济大学地下建筑与工程系,上海200092 [3]上海市民防地基勘查院,上海200232

出　　处：《岩土力学》2007年第6期1172-1175,1180,共5页Rock and Soil Mechanics

摘　　要：从桩与承台下地基土共同分担荷载的基本条件出发,提出了一种从单桩荷载沉降曲线入手的桩-土-承台共同作用简化分析方法。在给定单桩荷载水平下,假定承台下桩间土的变形量等于此时单桩沉降量,求解相应的板底应力,从而可以得到任意桩荷载水平下的承台荷载分担量,而不必将桩的受荷水平限制在极限荷载。将基础沉降分为桩间土变形量及桩端下卧土层的整体压缩量两部分进行分析。桩间土变形量等于单桩在给定荷载水平下的沉降量,而桩端下卧土层的整体压缩量则由承台与桩两部分荷载引起,可以相对准确地预测基础沉降量。工程实例分析与实测结果的比较表明该方法是可行的。Based on the mechanism analysis, a new simplified analytical method for the pile-soil-cap interaction is proposed. According to the static loading test results, the single pile settlement at a given loading can be determined. Assuming the soil deformation between the cap and pile toe is equal to the single pile settlement, the cap shared loading can be determined conveniently at a given single pile loading. The foundation settlement is produced by the soil deformation between the cap and pile toe and by the soil compression caused by the loading of piles and cap below the pile toe. An example of the proposed method is presented; and the comparison with field measurements shows that the proposed method is satisfactory.

关 键 词：桩基础 桩-土-承台共同作用 单桩荷载沉降曲线 桩间土变形 

分 类 号：TU473[建筑科学—结构工程]