合肥地铁更新统黏性土液限与塑性状态关系分析
|
摘要
在合肥地铁工程勘察过程中,发现部分样品标贯判定的塑性状态与室内试验的结果不一致,对综合判定土体塑性状态存在一定的干扰作用。针对更新统黏土"原位标贯击数高、液性指数偏大"的特点,分析了液性指数偏大的原因,初步确定了液限对液性指数的影响关系,综合判定了更新统黏性土的塑性状态。
In the period of engineering surveys for Hefei Metro,discrepancies were found between the plastic state of some specimen determined from standard penetration test and that from indoor test,which made certain interference in defining soil plasticity comprehensively. In relation to the characteristics of the Pleistocene clay,i. e. it is of high SPT blow count and relatively large liquidity index,the reasons hereof was analyzed, through which the effects of the liquid limit on the liquidity index were determined initially and the plastic state of Pleistocene clay was defined comprehensively.
In the period of engineering surveys for Hefei Metro,discrepancies were found between the plastic state of some specimen determined from standard penetration test and that from indoor test,which made certain interference in defining soil plasticity comprehensively. In relation to the characteristics of the Pleistocene clay,i. e. it is of high SPT blow count and relatively large liquidity index,the reasons hereof was analyzed, through which the effects of the liquid limit on the liquidity index were determined initially and the plastic state of Pleistocene clay was defined comprehensively.
引文
[1]GB50021—2001岩土工程勘察规范[S].北京:中国建筑工业出版社,2001.
[2]安徽省地质矿产局.安徽省区域地质志[M].1987.
[3]吴道祥.合肥市土体工程地质研究及综合评价[D].合肥:合肥工业大学,2001.
[4]安徽省建筑设计院.合肥膨胀土研究总结报告[R].北京:地质出版社,1978.
[5]中铁二院工程集团有限责任公司.合肥地铁岩土工程勘察报告[R].2013.
[2]安徽省地质矿产局.安徽省区域地质志[M].1987.
[3]吴道祥.合肥市土体工程地质研究及综合评价[D].合肥:合肥工业大学,2001.
[4]安徽省建筑设计院.合肥膨胀土研究总结报告[R].北京:地质出版社,1978.
[5]中铁二院工程集团有限责任公司.合肥地铁岩土工程勘察报告[R].2013.