摘要
贵阳龙洞堡国际机场T3航站楼所在场地范围内在原有地貌情况下新近抛填达40~60m超深回填土,局部区域下部还有高度达10~32m溶洞发育。置于中风化基岩上的桩基必须穿过超深回填区和岩溶强发育区,最长桩超过100m。本文重点阐述了超深回填区成桩工艺的选择,较破碎基岩上摩擦端承桩和嵌岩桩两种桩基设计的比选,超长桩区域三段变直径嵌岩灌注桩的优化设计和双套管双驱动全回转施工工艺。
Within the scope of the site of Terminal T3 of Guiyang Longdongbao International Airport,the ultra-deep backfill of 40~60 m was recently thrown and filled under the original geomorphologic conditions,and karst caves with a height of 10~32 m were developed in the lower part of some areas.Pile foundation placed on moderately weathered bedrock must pass through ultra-deep backfill area and karst strongly developed area,and the longest pile is more than 100 m.This paper focuses on the selection of pile forming technology in ultra-deep backfill area,the optimization design of three-section variable-diameter rock-socketed pile in super-long pile area and the construction technology of double-casing and double-drive full rotation,compared with the selection of friction end bearing pile and rock-socketed pile on broken bedrock.
作者
赖庆文
龙家涛
夏恩德
盛瑄
胡先林
陈尧文
LAI Qingwen;LONG Jiatao;XIA Ende;SHENG Xuan;HU Xianlin;CHEN Yaowen(Guizhou Architectural Design&Research Institute Co.,Ltd.,Guiyang 550081,China)
出处
《建筑结构》
CSCD
北大核心
2021年第S01期1804-1808,共5页
Building Structure
关键词
较破碎岩
岩溶强发育
超深回填土
嵌岩灌注桩
less cracked rock
the strong karst development
super thick backfill
rock-socketed pile