轻型动力触探法与静力触探法检测粗砂相对密实度的相关性研究  

Correlation study of light dynamic penetration test and cone penetration test in testing coarse sand

作　　者：田卿燕[1,2] 刘仰韶 吕建兵 

机构地区：[1]广东华路交通科技有限公司,广州510800 [2]中南大学土木建筑学院,长沙410075

出　　处：《岩土力学》2009年第9期2747-2752,共6页Rock and Soil Mechanics

基　　金：广东省交通厅项目(No.2002-013)

摘　　要：大量的模型试验和现场试验结果表明,轻型动力触探和静力触探都可用于公路桥涵台背回填中粗砂的密实度检测,而且锤击数N10和锥尖阻力Qc存在着良好的线性关系。为了从理论上揭示两者的相关性的根源,采用拉德模型模拟了两种方法的试验过程,三维有限元数值分析得知,两种触探方法在砂土中的应力、应变和位移场有较大的相似性,验证了轻型动力触探和静力触探在中粗砂中试验结果相关性的必然性。A large amount of analyses of model test and in-situ test results show that both light dynamic penetration and cone penetration tests can be used in testing the relative density of the back filling by coarse sand in highway roadbed construction; and there are good linear relationship between blow count N10 and static point resistance Qc. In order to disclose the root of the pertinence theoretically, Lade model is applied to three-dimensional finite analysis to simulate the two test processes; it is proved that the stresses, strains and displacements around the two kinds of test cones have great comparability.

关 键 词：中粗砂 轻型动力触探 静力触探 线性相关 

分 类 号：TU413[建筑科学—岩土工程]