摘要
随着城市规模的不断扩大,高层、超高层建筑物及大型桥梁的建设需求,桩基础逐渐向大直径、深埋深的方向发展。嵌岩桩是目前城市建设中经常遇到的桩型,有效确定嵌岩桩的竖向承载力并厘清其竖向荷载传递机制,是实现嵌岩桩安全、可靠使用的前提和保障。充分掌握嵌岩桩承载性能的前提是明确基桩的竖向承载力特征值,从宏观上得到基桩的荷载传递性状、桩-土-岩相互作用规律及桩受荷后的破坏模式。掌握嵌岩桩的破坏模式和荷载传递规律对深入认识嵌岩桩承载性能具有重要的意义。为此,从嵌岩桩的荷载传递规律、破坏模式、承载特性和影响承载特性的主要因素等4个方面对嵌岩桩承载性能的研究现状进行梳理,归纳和评述了嵌岩桩荷载传递特性及破坏特征的最新研究进展,总结了嵌岩桩承载性能现场试验和室内试验的研究进程,详细分析了影响嵌岩桩竖向承载性能的主要因素,讨论了现阶段嵌岩桩承载性能研究工作的不足之处,并针对研究的不完备提出相应的建议和研究方向。
With the continuous expansion of urban scale,the construction needs of high-rise and super high-rise buildings and large bridges,the pile foundation gradually develops towards large diameter and deep burial depth.Rock socketed piles are frequently encountered in urban construction.Effectively determining the vertical bearing capacity of rock socketed piles and clarifying their vertical load transfer mechanism is a prerequisite and guarantee for the safe and reliable use of rock socketed piles.The prerequisite for fully grasping the bearing performance of the embedded pile is to clarify the characteristic value of the vertical bearing capacity of the foundation pile,and to obtain the load transfer characteristics of the foundation pile,the pile-soil-rock interaction law and the damage mode of the pile after being loaded from a macro perspective.To master the damage mode and load transfer law of embedded piles is of great significance to the in-depth understanding of the bearing performance of embedded piles.To this end,the current status of the research on the load transfer law,damage mode,load bearing characteristics and the main factors affecting the load bearing characteristics of embedded piles was reviewed,the latest research progress on the load transfer characteristics and damage characteristics of embedded piles was summarized and reviewed,the research process of field tests and indoor tests on the load bearing characteristics of embedded piles was summarized,the main factors affecting the vertical load bearing performance of embedded piles were analyzed in detail,and the current stage of the research was discussed.The main factors affecting the vertical bearing performance of embedded piles were analyzed in detail,the shortcomings of the present research work on the bearing performance of embedded piles were discussed,and corresponding suggestions and research directions were put forward in view of the incompleteness of the research.
作者
闫楠
赵香梅
白晓宇
蒋冲
魏玉峰
张健
张明义
赵广
刘正明
YAN Nan;ZHAO Xiang-mei;BAI Xiao-yu;JIANG Chong;WEI Yu-feng;ZHANG Jian;ZHANG Ming-yi;ZHAO Guang;LIU Zheng-ming(School of Civil Engineering,Qingdao University of Technology,Qingdao 266520,China;Geotechnical Engineering Institute,Hunan University,Changsha 410082,China;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;College of Water Conservancy and Civil Engineering,Shandong Agricultural University,Taian 271018,China;Beris Engineering and Research Corporation,Qingdao 26655,China)
出处
《科学技术与工程》
北大核心
2023年第25期10625-10637,共13页
Science Technology and Engineering
基金
国家自然科学基金(51778312,51708316)
山东省自然科学基金重点项目(ZR2020KE009)
山东省博士后创新项目(201903043)。
关键词
嵌岩桩
荷载传递
破坏模式
竖向承载力
影响因素
foundation rock-socketed pile
load transfer
destruction mode
vertical bearing capacity
influencing factors
