南阳HNR热电厂工程单节和两节DX挤扩灌注桩的试验研究  

TEST STUDY OF DX PILES WITH SINGLE AND DOUBLE BULBS AT NANYANG HNR THERMO-ELECTRIC PLANT

作　　者：沈保汉[1] 王衍[2] 刘振亮 贺德新 耿瑜平[4] 

机构地区：[1]北京市建筑工程研究院,北京100039 [2]北京世纪旗云软件技术有限公司,北京100088 [3]北京中阔地基基础技术有限公司,北京100097 [4]黄委会勘测规划设计研究院,郑州450003

出　　处：《工业建筑》2009年第2期26-37,共12页Industrial Construction

摘　　要：通过现场静荷载试验,在膨胀土地基中对桩身穿越大气影响深度并以硬塑黏土为承力盘和桩端持力层的单节DX挤扩灌注桩及以硬塑黏土为上承力盘持力层和以硬塑—坚硬黏土为下承力盘和桩端持力层的两节DX挤扩灌注桩的极限承载力进行判定,分析其荷载传递机理,并对两类桩的侧阻力、盘端阻力和桩端阻力的分配及其发展规律进行研究。Static loading tests for DX piles with single and double bulbs installed in plastic clay were conducted in field. Their ultimate bearing capacities is determined, its load transfer mechanism is analysed, and the distribution and development of the skin-friction resistances, the bulb resistances and the tip resistances of DX piles of these two kinds are studied.

关 键 词：DX桩 承力盘 静荷载试验 极限承载力 侧阻力 盘端阻力 膨胀土 黏土 

分 类 号：TU473.1[建筑科学—结构工程] TU473.11[建筑科学—土工工程]