岩溶区桩基承载性能及影响因素研究进展综述  

Summary of Research Progress on Calculation Methods of Vertical Bearing Capacity of Pile Foundation in Karst Cave Development Area

作　　者：严君宇 侯振坤 唐孟雄 贺绍阳 凌造 李波 龚星 王磊[5] YAN Jun-yu;HOU Zhen-kun;TANG Meng-xiong;HE Shao-yang;LING Zao;LI Bo;GONG Xing;WANG Lei(School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006;Guangzhou Construction Co.,Ltd.,Guangzhou 510030;Guangzhou Municipal Construction Group Co.,Ltd.,Guangzhou 510030;Hunan Guotao Construction Engineering Co.,Ltd.,Yueyang 414000;Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071)

机构地区：[1]广东工业大学土木与交通工程学院,广州510006 [2]广州建筑股份有限公司,广州510030 [3]广州市建筑集团有限公司,广州510030 [4]湖南国涛建设工程有限公司,岳阳414000 [5]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071

出　　处：《广州建筑》2024年第2期123-127,共5页GUANGZHOU ARCHITECTURE

基　　金：国家自然科学基金项目(52208336、42002249、52378332);广东省自然科学基金项目(2023A1515012826);广州建筑股份有限公司科技计划项目/广州市建筑集团有限公司科技计划项目(2022–KJ002、2022–KJ015);广东省住房和城乡建设厅科技创新计划(2023-K26-564565);广州市科技计划项目-青年博士“启航”项目(2024A04J3902)。

摘　　要：岩溶区地质环境复杂,溶洞隐蔽性较大,给桩基施工和设计带来了巨大挑战。充分考虑溶洞与桩基的相互作用,是确保上部建筑安全的关键。本文以岩溶区桩基承载性能为背景,综述了岩溶桩基相关模型实验、数值模拟和理论计算方法,发现下伏溶洞型桩基现研究的重点为顶板安全厚度、岩板质量、桩身直径、溶洞尺寸等,顶板相对安全厚度的计算仍是一个难题。对于贯穿溶洞型,现浇桩基需解决施工问题,如灌注桩施工中的漏浆和卡钻问题;预制桩基受桩径小和难嵌岩等因素的影响,其在岩溶区普遍存在承载力不足的问题。研究成果为溶洞发育区桩基竖向承载力计算提供了重要指导。The complex environment of the karst area and the hidden location of the caverns bring great challenges to the construction and design of pile foundations.It is crucial to ensure the safety of the superstructure by fully considering the interaction between cavern and pile foundation.The bearing performance of pile foundations in karst areas is taken as the background,and the methods of modeling experiments,numerical simulation and theoretical calculations are highlighted and reviewed.The conclusions show that the present study of the downward-facing karst-type pile foundation focuses on the safe thickness of the top plate,the quality of the rock slab,the diameter of the pile body,and the size of the karst hole.Calculating the relative safety thickness of the top slab is still a difficult problem.For pile foundations penetrating through caverns,it is necessary to solve the construction problems such as slurry leakage and jammed drilling in the construction of cast-in-place piles and prefabricated pile foundations generally have insufficient bearing capacity in karst areas for its small pile diameters and difficult rock embedding.The results provide important guidance for the calculation of vertical bearing capacity of pile foundations in karst cave development areas.

关 键 词：溶洞 发育区 桩基 竖向承载力 研究进展 

分 类 号：TU4[建筑科学—土工工程]