多年冻土区抛石护坡路基室内试验研究  

Experimental study on ripped-rock revetment embankment in permafrost regions

作　　者：喻文兵[1] 赖远明[1] 张学富[2] 张明义[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000 [2]重庆交通大学土木建筑学院,重庆410074

出　　处：《岩土工程学报》2005年第10期1233-1236,共4页Chinese Journal of Geotechnical Engineering

基　　金：国家杰出青年科学基金资助项目(40225001);中国科学院全国优秀博士学位论文作者专项基金;国家自然科学基金资助项目(40401010);中科院重大知识创新项目(KZCX1-SW-04)

摘　　要：多年冻土区道路病害主要是由路基下冻土温度升高融化下沉引起。由于阴阳坡差异引起路基不均匀沉降而导致的路面纵向裂缝病害严重影响了路基的稳定性。通过室内试验研究了在相同温度边界条件下普通路基和抛石护坡路基的温度分布特征,对比分析了两种路基结构的温度差异。结果表明:普通路基的阴阳坡两侧温度分布极不对称;铺设抛石护坡后,这种状况得到了很大改善,并且抛石护坡下土体温度明显降低;抛石护坡能够降低路基温度和调节路基阴阳坡的温度差异;抛石护坡是多年冻土区防治路基融沉和纵向裂缝病害的一种可行措施。Engineering damages of embankment in permafrost regions are mainly caused by thaw settlement of permafrost. Its stability is destroyed with longitudinal cracks of embankment caused by asymmetric settlement of permafrost. The temperature properties conditions of a traditional embankment and a ripped-rock embankment were contrasted by laboratory experiments. Results showed that the temperature distribution of the traditional embankment was asymmetrical; the asymmetrical status was changed after ripped-rock revetment was installed and the soil under the ripped-rock was cooled obviously; the ripped-rock revetment could cool embankment and adjust the temperature difference between the north-facing slope and the south-facing slope; the ripped-rock revetment was an available technique to protect embankment from thawing settlement and longitudinal cracks in permafrost regions.

关 键 词：多年冻土 路基 不均匀沉降 纵向裂缝 抛石护坡 

分 类 号：TU445[建筑科学—岩土工程]