软土地基挤扩支盘桩抗拔试验研究  

Field Test on Uplift Behavior of Squeezed Branch Pile in Soft Soil Ground

作　　者：张琰[1] 陈培[1] 

机构地区：[1]中国电力科学研究院,北京102401

出　　处：《建筑科学》2012年第11期55-57,61,共4页Building Science

摘　　要：挤扩支盘桩是近年来新兴的一种变截面桩型,具有承载力高、沉降小,施工机具简单等优点。针对我国沿海地区软土地基,开展了挤扩支盘桩的竖向抗拔静载荷试验,得到了极限抗拔承载力。通过试桩的桩身内力测试,得到桩身轴力的分布规律,研究了挤扩支盘桩的荷载传递机理和抗拔承载性能。试验结果表明,挤扩支盘桩的竖向抗拔承载力比普通直孔桩有明显提高,具有良好的经济性和广阔的应用前景。The squeezed branch pile is a new type variable cross-section pile foundation,and it has the virtue of high bearing capability,low settlement,simple machinery.With regard to the soft soil foundation in the littoral of China,the vertical pulling static loading tests were carried out to obtain the ultimate bearing capacity.By testing the internal force of the pile,the distribution law of axial force is obtained;the load transfer mechanism and bearing capability are studied.Based on the test results,the squeezed branch pile has obvious advantages in bearing capability compared to the conventional pile,as well as economic benefits and wide application prospect.

关 键 词：软土地基 挤扩支盘桩 静载荷试验 抗拔 

分 类 号：TU447[建筑科学—岩土工程] TU473[建筑科学—土工工程]