H-V组合荷载作用下HSCM桩承载性能  

Bearing Performance of HSCM Piles under Combined H-V Loading

作　　者：郑家昌 宗钟凌 黄蕴晗 金纬 范毅敏 高霁宇 郭承宇 丁文龙 王卓群 ZHENG Jiachang;ZONG Zhongling;HUANG Yunhan;JIN Wei;FAN Yimin;GAO Jiyu;GUO Chengyu;DING Wenlong;WANG Zhuoqun(School of Civil and Ocean Engineering,Jiangsu Ocean University,Lianyungang 222005,China)

机构地区：[1]江苏海洋大学土木与港海工程学院,江苏连云港222005

出　　处：《江苏海洋大学学报（自然科学版）》2024年第2期81-88,共8页Journal of Jiangsu Ocean University:Natural Science Edition

基　　金：江苏省重点研发计划(社会发展)项目(BE2021681)。

摘　　要：螺旋桩芯劲性复合桩(helix stiffened cement mixing pile,HSCM桩)是由螺旋桩芯与水泥土桩劲性复合而成的新型桩基。为研究水平-竖向(H-V)组合荷载作用下HSCM桩的承载性能,基于自制土工箱,开展HSCM桩室内模型试验研究,设计并制作3组共12根HSCM模型桩进行H-V组合荷载试验,分析加载角度与螺旋叶片数量对桩基承载性能的影响。试验结果表明:上拔荷载分量对桩基水平极限承载性能有不利影响;叶片数量越多,HSCM桩成桩质量越好,H-V组合荷载作用下承载力越大。Helix stiffened cement mixing pile(HSCM pile)is a new type of pile foundation composed of a spiral pile core and a cement soil pile.In order to study the bearing performance of helix stiffened cement mixing piles(HSCM piles)under combined horizontal-vertical(H-V)load,three groups of 12 HSCM model piles were designed and fabricated for conducting H-V combined load tests,aiming to analyze the effects of the loading angle and the number of helical blades on the bearing performance of the pile foundation.The test results show that appropriately increasing the number of blades in HSCM pile core can improve the integrity of the pile body and improve the load-bearing performance of the pile foundation under the H-V combined load.The uplift load component has a negative impact on the horizontal ultimate bearing capacity of the pile foundation,while the shape of the pile body has a small impact on the horizontal bearing capacity.

关 键 词：螺旋桩 劲性复合桩 组合加载 模型试验 

分 类 号：TU476[建筑科学—结构工程]