岩溶区建筑桩基施工勘察方案优化  

Optimization of Investigation for Pile Foundation Construction

作　　者：曹贤发[1,2] 李海玲 

机构地区：[1]桂林理工大学,土木与建筑工程学院,广西桂林 [2]广西岩土力学与工程重点实验室,广西桂林

出　　处：《土木工程》2019年第3期735-741,共7页Hans Journal of Civil Engineering

基　　金：广西自然科学基金面上项目(2018GXNSFAA138139);广西岩土力学与工程重点实验室基金资助项目(14-B-05);桂林理工大学博士科研启动基金(GUTQDJJ2014031)。

摘　　要：针对目前岩溶建筑桩基施工勘察的主要问题,提出了以岩溶强发育深度作为桩基施工勘察钻孔最小深度控制标准的施工勘察优化方案。结果表明:一桩多孔方案虽可有效解决施工勘察深度不足的问题,但其经济合理性值得商榷;若所有钻孔均进入岩溶强发育层以下一定深度范围,同时满足钻孔底部完整岩厚度大于3倍桩径且不小于5 m的要求时,则一桩一孔方案具有很好的技术可行性,也能取得良好的经济效益。The optimization of investigation for pile foundation construction is proposed,in which the depth of intensity karstification becomes the criterion for determining borehole depth.Results show that,one pile with several boreholes can effectively solve the problem of insufficient depth in pile con-struction investigation,but the economical rationality is arguable.If all boreholes exceed certain depth range of intensity karstification,and intact rock over 5 m below pile tip is no less than three times the thickness of pile diameter,the optimization scheme of one-pile-with-one-borehole is tech-nically feasible,and the economic benefits are also rational.

关 键 词：岩溶 岩溶强发育深度 桩基施工勘察 

分 类 号：U4[交通运输工程—道路与铁道工程]