楔形桩的研究进展及承载机理分析  

RESEARCH PROGRESS AND BEARING MECHANISM ANALYSIS OF TAPERED PILES

作　　者：宿金成[1] 沈爱华[1] 杨晓庄[1] 吕书清[1] SU Jincheng;SHEN Aihua;YANG Xiaozhuang;LV Shuqing(School of Energy and Civil Engineering, Harbin University of Commerce, Harbin 150028, China)

机构地区：[1]哈尔滨商业大学能源与建筑工程学院,哈尔滨150028

出　　处：《低温建筑技术》2019年第2期70-74,共5页Low Temperature Architecture Technology

基　　金：2017年度黑龙江省普通高等学校青年创新人才培养计划(UNPYSCT-2017207);黑龙江省自然科学基金(E2017055);2016年哈尔滨商业大学青年创新人才支持项目(2016QN062);哈尔滨商业大学博士科研启动项目(14LG23)

摘　　要：楔形桩是一种桩身截面尺寸沿埋深渐变的异形桩。楔形桩的承载性能优越性学界和工程界已达成共识。但是由于其研究的深度和广度不够,至今未形成统一有效的楔形桩设计理论。文中从现场试验、室内试验、理论分析和数值模拟等四个方面,总结分析楔形桩的研究情况。并着重对楔形桩的承载机理进行了分析,认为楔形桩承载力组成中侧阻力所占的比例比较大,其承载力的提高主要是侧阻力的提高,楔形桩侧阻力提高的最根本来源是空腔扩张效应。文中的总结分析以及对楔形桩承载机理的认识,对楔形桩的在实际工程中的应用和研究有着十分重要的意义。The tapered pile is a kind of special shaped pile whose cross-section size gradually changes along depth. A consensus has been reached on the superiority of bearing capacity of tapered pile in academic circles and engineering circles. However, due to the lack of depth and breadth of its research, no unified and effective design theory of tapered piles has been formed so far. This paper summarized and analyzed the research situation of tapered pile from four aspects: field test, laboratory test, theoretical analysis and numerical simulation, in which the bearing mechanism of tapered piles was analyzed emphatically. The analysis shows that the side resistance accounts for a large proportion in the bearing capacity of the tapered pile, and the increase of the bearing capacity is mainly due to the increase of the side resistance. The cavity expansion effect results in booming the side resistance of tapered pile. The summary and the understanding of the bearing mechanism of tapered piles are of great practical significance to the engineering application and research of tapered piles.

关 键 词：楔形桩 承载机理 空腔扩张 

分 类 号：TU473[建筑科学—结构工程]