青藏铁路多年冻土区路基下的融化夹层

来源 :2015年全国工程地质学术年会 | 被引量 : 0次 | 上传用户：star33333

【摘要】

：

基于青藏铁路路基变形与地温观测数据,研究了多年冻土区路基下融化夹层特征及其对路基沉降变形的影响.结果表明:在已有监测场地中,青藏铁路沿线天然场地融化夹层发育较少;而路基下融化夹层发育较多,低温冻土区路基下融化夹层能够逐渐完全回冻使其消失,高温冻土区大部分路基下融化夹层有进一步发展的趋势.高温冻土区路基下融化夹层厚度的增加主要是由多年冻土人为上限的下降引起的.当融化夹层下部为高含冰量冻土时,融化夹层

【作者】

：

孙志忠张明义李双洋武贵龙郑剑锋

【机构】

：

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兰州730000 中国科学院寒区旱区环境

【出处】

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2015年全国工程地质学术年会

【发表日期】

：

2015年4期

【关键词】

：

铁路路基融化夹层沉降变形现场监测冻土区

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青藏铁路多年冻土区路基下的融化夹层

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