摘要
介绍CRG桩施工方法及首次施工的情况,并讨论在岩溶地区施工中遇到的岩层稳定性控制、孔内沉渣清理、桩管的吊装与驳接及灌浆问题。CRG桩按嵌岩桩设计,分析静载试验结果,发现本次的静载试验结果只发挥桩的侧阻力而没有发挥桩的端阻力,对其产生的原因进行分析。同时,总结CRG桩在岩溶地区施工工艺,为后续在花岗岩和泥质砂岩持力层中试验成功及工程应用积累经验。
The construction technological process of concrete reinforced grouting(CRG) piles and the first construction are introduced.The difficulties and problems in the control of rock stability,clay clearing and rock sediment in drill hole,fixing reinforced pile and grouting in construction are discussed in karst area.CRG piles are design according to socket rock piles,and the in-situ static loading tests are performed.The courses that the lateral resistance of piles is fully utilized,but the bottom rock resistance is not employed.The construction technological process of CRG piles is summarized in karst area.Experiences are accumulated for testing and application of CRG piles to bearing layers in granite and clay sandstone.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第z2期3441-3448,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
广州市建设科技基金重点项目(200102)
关键词
桩基工程
CRG桩
施工工法
岩溶地区
试验研究
pile foundations
concrete reinforced grouting(CRG) pile
construction technological process
karst area
experimental study
