湿陷性黄土中大直径扩底桩垂直承载性状的试验研究  

Vertical Bearing Behaviour of Large Diameter Belled Pile in Collapsible Loess

作　　者：李大展[1] 滕延京[1] 何颐华[1] 隋国秀[1] 

机构地区：[1]中国建筑科学研究院地基所,西北电力设计院

出　　处：《岩土工程学报》1994年第2期11-21,共11页Chinese Journal of Geotechnical Engineering

摘　　要：本文根据湿陷性黄土中桩侧和桩底均埋有测试元件的４根大直径扩底桩的现场实测数据，分析了浸水湿陷对桩垂直承载力的影响，得出了负摩阻力的变化规律，最后提出浸水湿陷全过程中大直径桩荷载传递机理的《三阶段分析法》。Measurements were made for 4 large diameter cast-in-place belled piles in collapsible loesswith instruments on shafts and toes.Influences of immersion collapsibility on pile vertical bearingcapacity were analyzed.Law of variation in negative skin friction was obtained.A“3-stage method”foranalyzing load transfer mechanism of large diameter pile during time of immersion test is presented.

关 键 词：垂直承载性状 扩底桩 湿陷性黄土 

分 类 号：TU475.3[建筑科学—结构工程]