浅层砂土地基承载力特征值的确定  

Determining Characteristic Value of Bearing Capacity of Shallow Sand Foundation

作　　者：李健 LI Jian(AVIC Institute of Geotechnical Engineering Co.Ltd.,Beijing 100098)

机构地区：[1]中航勘察设计研究院有限公司,北京100098

出　　处：《土工基础》2023年第2期284-287,共4页Soil Engineering and Foundation

摘　　要：在某浅层砂土场地勘察中,为确定地基承载力特征值,采用了标准贯入试验、圆锥动力触探试验(重型及轻型)、浅层平板载荷试验等多种原位测试方法。基于不同原位测试成果,推定出了相应的承载力特征值。分析表明:在缺乏经验数据的地区确定承载力时,仅采用单一原位测试方法会存在不足;探讨了不同原位测试方法推定的承载力存在差异的原因。浅层平板载荷试验广泛运用于确定承载力特征值,具有较高的准确性。综合分析确定承载力特征值,可以提高基础设计的安全性和经济性,为相类似的场地提供一定的参考。In geotechnical engineering investigation of a shallow sand foundation site,to determine characteristic value of the bearing capacity,a variety of in-situ tests were used including the standard penetration test,the heavy-duty dynamic penetration test,the portable cone sounding test and the shallow plate loading test.Throughout these in-situ tests results,the corresponding characteristic value of bearing capacity were obtained.The analysis reveals that,at site without sufficient engineering experience,the determination of the bearing capacity by a single in-situ test result has fundamental flaws.There are differences in bearing capacity results by different in-situ tests and explore possible explanations for the differences.The shallow plate loading test is of high reliability and has been applied widely in the determination of the bearing capacity value.The comprehensive analysis and discussion on the characteristic value of bearing capacity could improve the safety and economics for the foundation design.

关 键 词：浅层砂土地基 承载力 原位测试 浅层平板载荷试验 

分 类 号：TU471[建筑科学—结构工程]