加筋劲性水泥土桩的应力应变与极限承载力研究  

Research on reinforced cement-soil pile's stress straining and ultimate bearing capacity

作　　者：金正超 吴海花[1] 方光秀[1] 

机构地区：[1]延边大学工学院土木工程系,吉林延吉133002

出　　处：《延边大学学报（自然科学版）》2014年第3期235-239,共5页Journal of Yanbian University（Natural Science Edition）

基　　金：延边大学博士科研启动基金资助项目(12-96);延边大学科技发展计划项目(2012)

摘　　要：通过1个水泥土模型桩和2个劲性水泥土组合模型桩以及2个加筋劲性水泥土组合模型桩的静载荷试验,分析了组合桩的极限承载力、Q-S曲线及应力-应变曲线.分析表明:1土工格栅围箍面积越大,模型桩的应力应变变化速度越缓慢;2围箍面积越大,提高承载力的作用越明显;3加筋劲性水泥土组合桩的4根芯桩离桩心距离为40mm时,土工格栅的作用最明显,其极限承载力提高12.5%.Based on the static load test on one cement-soil model pile, two strong cement-soil composite model piles and two reinforced cement-soil composite piles, we analyzes the ultimate bearing capacity, Q-S curve and stress-straining curve of composite piles. The results showed that： firstly, the larger the geogrid^s area of hoop is, the slower the model pile＇s stress straining changes; secondly, the larger the area of hoop is, the more obvious the effect of increasing bearing capacity is; and thirdly, when the four core piles of the reinforced cement-soil piles is 40 mm away from the pile heart, the geogrid＇s effect is the most obvious, and its ultimate bearing capacity is increased by 12.5%.

关 键 词：土工格栅 加筋劲性水泥土桩 极限承载力 桩心距 

分 类 号：TU472.6[建筑科学—结构工程]