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作 者:张福海[1,2,3] 徐嘉成 薛浩宇 刘峥嵘 ZHANG Fuhai;XU Jiacheng;XUE Haoyu;LIU Zhengrong(Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;Jiangsu Research Center for Geotechnical Engineering Technology,Hohai University,Nanjing 210098,China;Engineering Research Center of Dredging Technology,Ministry of Education,Hohai University,Changzhou 213022,Jiangsu China)
机构地区:[1]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [2]河海大学江苏省岩土工程技术工程研究中心,南京210098 [3]河海大学疏浚技术教育部工程研究中心,江苏常州213022
出 处:《河南科学》2023年第5期730-737,共8页Henan Science
基 金:国家自然科学基金面上项目(51778211)。
摘 要:为探究非规则颗粒级配分布对杂填土地基互嵌沉降的影响,借助自主研制的杂填土与软土互嵌试验仪,通过室内试验分析杂填土地基试样的互嵌沉降和软土固结沉降,研究级配不同的3种杂填土地基试样在不同上覆荷载(50、100、150 k Pa)作用下的总沉降、互嵌沉降的发展规律及互嵌沉降和总沉降之间的关系,探究曲率系数和上覆荷载变化对杂填土地基试样稳定沉降量的影响.试验结果表明:级配不同的3种杂填土地基试样的总沉降和互嵌沉降时程曲线均可划分为线性增长、缓慢上升、趋于稳定3个阶段.互嵌沉降是杂填土地基试样沉降的主要组成部分,特别是在互嵌发展的初期.当上覆荷载较小(50 kPa)时,杂填土地基试样的稳定沉降量随杂填土曲率系数的增大先增大后减小;当上覆荷载较大(100 k Pa和150 kPa)时,杂填土地基试样的稳定沉降量随杂填土曲率系数的增大先减小后增大.In order to explore the influence of irregular particle gradation distribution on the mutual embedding settlement of miscellaneous fill foundation,the mutual embedding settlement and soft soil consolidation settlement of miscellaneous fill foundation samples were analyzed through laboratory tests with the help of the mutual embedding test instrument for miscellaneous fill soil and soft soil independently developed.The development law of total settlement and mutual embedding settlement and the relationship between mutual embedding settlement and total settlement of three kinds of miscellaneous fill foundation samples with different gradations under different overlying loads(50,100,150 kPa)were studied,and the influence of curvature coefficient and overlying load changes on the stable settlement of miscellaneous fill foundation samples was explored.The test results show that the time history curves of total settlement and mutual embedding settlement can be divided into three stages:linear growth,slow rise and stabilization.Mutual embedding settlement is the main component of the settlement of miscellaneous fill foundation samples,especially in the early stage of mutual embedding development.When the overlying load is small(50 kPa),the stable settlement of the miscellaneous fill foundation samples first increases and then decreases with the increase of the curvature coefficient of the miscellaneous fill.When the overlying load is large(100 kPa and 150 kPa),the stable settlement of the miscellaneous fill foundation samples decreases first and then increases with the increase of the curvature coefficient of the miscellaneous fill.
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