武昌中风化红砂岩特性和嵌岩桩承载力确定  

Behaviors of red medium-weathered sandstone in Wuchang and determination of bearing capacity of the piles embedded in it

作　　者：杨育文[1] 罗坤[1] 

机构地区：[1]武汉市勘测设计研究院,湖北武汉430022

出　　处：《岩土工程学报》2007年第10期1568-1571,共4页Chinese Journal of Geotechnical Engineering

基　　金：武汉市建设委员会科研资助项目(2004-21)

摘　　要：通过对中风化红砂岩室内抗压强度试验、现场载荷试验、抽芯试验,结合场地工程勘察资料,确定岩基承载力特征值。人工挖孔扩底桩以该层作为桩端持力层,并进行了桩的静载荷试验。本文对这些试验中的大量数据进行了总结和归纳,特别是对中风化红砂岩的一些变形特性进行了分析,确定了在实际工程中有重要参考价值的数据,同时也指出了规范中相应条款中过于保守的问题,并提出了修改意见。The characteristic values of bearing capacity of the medium-weathered red sandstones in Wuchang were evaluated and determined by the comparison among the data from unconfined compression tests, compression tests of rock core, static load tests as well as site investigation. For two expanded-base piles with expanded-base embedded in this kind of rock, static pile load tests were carried out to explore load-settlement relationship. After summarizing plenty of test data, and particularly assessing settlement behaviors of the weathered rock, some valuable data were proposed. The requirements proposed in a technical code were found to be very conservative and some recommendations were given to modify them.

关 键 词：中风化红砂岩 承载力特征值 静载荷试验 桩 

分 类 号：TU473[建筑科学—结构工程]