云罗高速公路沿线高液限土承载比影响因素分析  

Analysis of factors influencing California bearing ratio of high-liquid limit soil along Yunluo Expressway

作　　者：程涛[1,2] 洪宝宁[1,2] 程江涛[3] 

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,江苏南京210098 [2]河海大学岩土工程研究所,江苏南京210098 [3]安徽省质量技术监督局,安徽合肥230051

出　　处：《河海大学学报（自然科学版）》2013年第5期434-438,共5页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(51079052);广东省交通厅基金(200903005)

摘　　要：以云罗高速公路工程中的高液限土改良方案为背景,通过试验研究颗粒级配和矿物成分对具有明显地区特征的掺砂高液限粉土和高液限黏土承载比的影响。结果表明:亲水性矿物成分是影响高液限土水敏性、膨胀率、加州承载比C CBR的主要原因之一;细颗粒含量越高,水敏性越强,C CBR越小;影响土体C CBR的主要因素是亲水性矿物含量,其次为黏粒组颗粒曲线分布情况及黏粉比;黏粉比越小,C CBR越大。of particle Based on an improving scheme for the high-limit liquid soil along the Yunluo Expressway, the influence gradation and mineral composition on the CcBR of high-liquid limit clay and soil mixed with sand with obvious regional characteristics was studied through experiments. The results show that the water sensitivity, inflation rate, and CcBR of high-liquid limit soil were mainly affected by hydrophilie minerals; the CCBa value decreased and the water sensitivity became stronger with the increase of the fine particle content; the main influencing factor of CcBR was the content of hydrophilic minerals, followed by the distribution of clay particles and the clay-silt ratio; and the CcBR value increased with the decrease of the clay-sih ratio.

关 键 词：高液限土 掺砂改良 承载比 颗粒级配 矿物成分 土样室内试验 云罗高速公路沿线 

分 类 号：TU431[建筑科学—岩土工程]