| 冻融循环对压实黄土湿陷变形影响的过程和机制 |
| |
| 引用本文： | 李国玉,马巍,穆彦虎,周成林,毛云程.冻融循环对压实黄土湿陷变形影响的过程和机制[J].中国公路学报,2011(5). |
| |
| 作者姓名： | 李国玉 马巍 穆彦虎 周成林 毛云程 |
| |
| 作者单位： | 中国科学院寒区旱区环境与工程研究所;甘肃省交通科学研究院有限公司; |
| |
| 基金项目： | 国家自然科学基金项目(40821001,40801022,41071048); 中国科学院西部行动计划项目(KZCX2-XB2-10),中国科学院寒区旱区环境与工程研究所青年人才基金项目(O984881001); 国家西部交通建设科技项目(200831800025); 冻土工程国家重点实验室开放基金项目(SKLFSE-ZQ-02); 中国博士后科学基金项目(2009023120) |
| |
| 摘 要： | 为研究冻融循环对压实黄土湿陷变形影响的过程和机制,对压实黄土进行补水条件下的冻融循环试验,测试了冻融循环前后压实黄土的温度、水分、变形、干密度、孔隙比和湿陷变形。结果表明:反复的冻融循环引起了压实黄土反复的冻胀和融沉变形,土样中水分不断增加且向中上部聚集,干密度减小,孔隙比增加,最终导致黄土湿陷变形增加;冻融循环和增湿作用引起的压实黄土结构疏松和强度弱化是黄土地基和路基湿陷变形增加的主要原因。研究成果为季节冻土区黄土湿陷产生的原因和机制研究提供了一种新的思路和解释,为黄土湿陷灾害防治提供了科学依据。
|
| 关 键 词： | 道路工程 压实黄土 试验研究 湿陷变形 季节冻土 冻胀 融沉 |
Process and Mechanism of Impact of Freezing and Thawing Cycle on Collapse Deformation of Compacted Loess |
| |
| LI Guo-yu,MA Wei,MU Yan-hu,ZHOU Cheng-lin,MAO Yun-cheng.Process and Mechanism of Impact of Freezing and Thawing Cycle on Collapse Deformation of Compacted Loess[J].China Journal of Highway and Transport,2011(5). |
| |
| Authors: | LI Guo-yu MA Wei MU Yan-hu ZHOU Cheng-lin MAO Yun-cheng |
| |
| Institution: | LI Guo-yu1,MA Wei1,MU Yan-hu1,ZHOU Cheng-lin1,MAO Yun-cheng1,2(1.Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,Gansu,China,2.Gansu Provincial Communications Science Research Institute Co.,Ltd,Lanzhou 730050,China) |
| |
| Abstract: | In order to study the process and mechanism of impact of freezing and thawing cycle on collapse deformation of the compacted loess,freezing and thawing cycle tests with water supply were carried out.The temperature,water content,deformation,dry density,void ratio and collapse deformation of compacted loess before and after freezing and thawing cycle were measured.Results show that freezing and thawing cycle leads to repeated frost heave and thaw settlement,also leads to increase of water content and void ra... |
| |
| Keywords: | road engineering compacted loess experimental research collapse deformation seasonal frozen soil frost heave thaw settlement |
| 本文献已被 CNKI 等数据库收录！ |
|
