软土地基挤扩支盘桩基础试验研究  

Experimental study on squeezed branch pile foundation in soft soil ground

作　　者：张琰[1] 陈培[1] 赵贞欣[2] 

机构地区：[1]中国电力科学研究院,北京100192 [2]河北省电力勘测设计研究院,河北石家庄050031

出　　处：《岩土工程学报》2013年第S2期994-997,共4页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(51108435)

摘　　要：挤扩支盘桩具有承载力高、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压、抗拔和水平静载荷试验,得到了极限抗压、抗拔和水平承载力。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承载性能。试验结果表明,挤扩支盘桩的竖向承载力比普通直孔桩有较大提高,具有广阔的应用前景。The squeezed branch pile has the virtues of high bearing capacity, low settlement and simple machinery. With regard to soft soil foundation in the littoral of China, the vertical compressive, vertical pulling and horizontal static load tests are carried out to obtain the ultimate bearing capacity under various working conditions. By testing the internal force of piles, the distribution law of the axial force is obtained, and the load transfer mechanism and bearing capacity are studied. Based on the test results, the squeezed branch pile has obvious advantages in bearing capacity compared with the conventional piles.

关 键 词：挤扩支盘桩 软土地基 静载荷试验 承载能力 

分 类 号：TU473.1[建筑科学—结构工程]