北京BGFD风电场两节DX挤扩灌注桩抗压和抗拔承载力机理的试验研究  

TEST STUDY OF COMPRESSION AND TENSION BEARING MECHANISM OF DX PILES WITH DOUBLE BULBS AT BEIJING BGFD WIND POWER STATION

作　　者：沈保汉[1] 王衍[2] 赵辉 周晓波 王醒 贺建东 贺德新 齐志诚 

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]北京市建筑工程质量第一检测所,北京100039 [4]北京中阔地基基础技术有限公司,北京100097 [5]北京勘测设计研究院,北京100024

出　　处：《工业建筑》2009年第2期45-54,79,共11页Industrial Construction

摘　　要：通过现场抗压和抗拔静载试验,对以粉细砂和黏质粉土为上、下承力盘持力土层和以黏质粉土为桩端持力土层的两节抗压DX挤扩灌注桩及以砂质粉土和粉砂层为上、下承力盘持力土层的两节抗拔DX挤扩灌注桩的抗压和抗拔极限承载力进行判定,分析其承载机理,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,为该工程的应用提供了详实的依据。A series of compression and tension static loading tests for DX piles with double bulbs which were respectively installed in silty fine sand and sandy silt were conducted in field. The ultimate bearing capacities are 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 this kind are studied. The test results supplies full and accurate bases for engineering applications.

关 键 词：DX桩 承力盘 极限承载力 侧阻力 盘端阻力 粉砂 砂质粉土 

分 类 号：TU473.1[建筑科学—结构工程] TU473.14[建筑科学—土工工程]