滨海相软粘土的原位力学性能试验研究  

Experimental Research On In-Situ Mechanical Properties of Littoral Facies Soft Clay

作　　者：陈能远[1,2] 王妙瑜 王蕊 李姝佳 孟庆山[2] Chen Nengyuan;Wang Miaoyu;Wang Rui;Li Shujia;Meng Qingshan(Electric Comprehensive Survey Institute of Information Industry Department,Xi'an,China;Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,China;Xijing University,Xi'an,China)

机构地区：[1]信息产业部电子综合勘察研究院,陕西西安 [2]中国科学院武汉岩土力学研究所,湖北武汉 [3]西京学院,陕西西安

出　　处：《科学技术创新》2023年第7期135-138,共4页Scientific and Technological Innovation

摘　　要：为探究滨海相软土的力学特性,对上海地区滨海软粘土进行了原位力学性能测试。试验结果表明:静力触探试验测得的固结系数明显高于室内试验成果,且粘性土的固结系数明显低于粉性土;随深度的增加,旁压试验测得的特征压力值、模量值和不排水抗剪强度逐渐增强;淤泥质粘土和粘土层的水平应力指数KD和材料指数ID随深度的增加而明显增大,而浅部粉质粘土、粘质粉土、粉砂层ID则大体一致;十字板剪切试验测得的残余强度约为峰值强度的21.1~27.0%,随着深度的增加,峰值强度和残余强度均有缓慢增强的趋势。In order to explore the mechanical properties of coastal soft soils,conducted in-situ mechanical performance tests on coastal soft clays in Shanghai.Experiments show that,the consolidation coefficient measured by static cone penetration test is obviously higher than that of laboratory test,and the consolidation coefficient of cohesive soil is obviously lower than that of silty soil;with the increase of depth,the characteristic pressure value,modulus value and undrained shear strength measured by pressuremeter test gradually increase;the horizontal stress index KD and material index ID of muddy clay and clay layer increase obviously with the increase of depth,while the ID of shallow silty clay,clay silt and silt layer is roughly the same;the residual strength measured by the cross-plate shear test is about 21.1~27.0%of the peak strength;with the increase of depth,the peak strength and residual strength increase slowly.

关 键 词：软粘土 原位力学性能 试验研究 

分 类 号：TU413[建筑科学—岩土工程]