广佛放射线岩溶对桩基的影响  

EFFECTS OF KARST ON PILE FOUNDATIONS OF GUANGZHOU— FOSHAN LINES

作　　者：伍四明[1] 石汉生[2] 朱照宇[1] 

机构地区：[1]中国科学院广州地球化学研究所,广东广州510640 [2]广东省建筑设计研究院,广东广州510010

出　　处：《岩石力学与工程学报》2006年第z2期3559-3564,共6页Chinese Journal of Rock Mechanics and Engineering

摘　　要：广佛放射线灰岩区的工程地质条件复杂,岩溶非常发育,通过详细勘察和施工阶段勘察,基本查明场地的工程地质条件。本工程基础采用冲孔灌注桩,利用连续完整的微风化泥岩(泥质粉砂岩)或完整灰岩做桩端持力层,但由于灰岩区砂层厚、次一级断层发育、岩溶发育和地下水丰富等原因,岩溶对桩基设计、施工和桩基质量的影响很大。根据本工程的特点,对出现的问题采取一系列的工程处理方法。实践结果证明,设计、施工所提出的方法等对岩溶的处理是有效的。The engineering geological conditions of Guangzhou—Foshan Lines are complicate,and the karsts are fully developed.The unknown engineering geological conditions are identified through detailed and additional investigation.The pile foundations are employed with punching boring,whose bearing strata are slightly weathered.Because there exist thick sand,fully developed faults and karst,and enriched groundwater,the karsts will have considerable effects on design and construction of engineering.If improper measurements are takent,hey can improve the qualities of pile foundations.The series of treatment methods are adopted for the karst in design and construction.The achieved results show that it is available for considering the proposed methods in karst region.

关 键 词：桩基工程 广佛放射线 工程地质条件 灰岩 岩溶 

分 类 号：TU473.1[建筑科学—结构工程]