武汉WW工程四节DX挤扩灌注桩的试验研究和应用  

TEST STUDY AND APPLICATION OF DX PILE WITH FOUR BULBS AT WUHAN WW PROJECT

作　　者：沈保汉[1] 王衍[2] 周青春[3] 贺德新 刘振亮 

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]中国科学院武汉岩土力学研究所,武汉430071 [4]北京中阔地基基础技术有限公司,北京100097

出　　处：《工业建筑》2009年第2期8-15,共8页Industrial Construction

摘　　要：通过现场静荷载试验,对以稍密粉砂、中密粉砂和中密粉细砂为承力盘持力层和以中密粉细砂为桩端持力层的四节DX挤扩灌注桩的极限承载力进行判定,分析桩的荷载传递机理,并对桩侧阻力、盘端阻力和桩端阻力的分配及其发展规律进行研究,最后对DX桩在WW大厦的应用情况给予介绍。Static loading tests for DX piles with four bulbs installed in silty sand and silty fine sand were conducted in field. The ultimate bearing capacities are determined, the 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 this kind are studied. Finally, the values of the settlement measurement of WW Building are also listed.

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 砂层 

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