冻结状态青藏粉质黏土的渗透系数测量研究

张虎; 张建明; 张致龙; 柴明堂

doi:10.11779/CJGE201606008

冻结状态青藏粉质黏土的渗透系数测量研究 English Version

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

基金项目: 国家自然科学基金青年科学基金项目（41401087）; 冻土工程国家重点实验室自主研究课题项目（SKLFSE-ZQ-26）; 中国科学院寒区旱区环境与工程研究所青年人才成长基金项目（Y551C91001）; 国家科技支撑计划课题（2014BAG05B03）

详细信息

作者简介:
张虎（1986- ）,男,助理研究员,主要从事冻土力学及寒区工程等方面研究。E-mail: zhanghu@lzb.ac.cn。

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出版历程
- 收稿日期: 2015-05-18
- 发布日期: 2016-06-24

Measurement of hydraulic conductivity of Qinghai-Tibet Plateau silty clay under subfreezing temperatures

State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China

摘要

摘要: 粉质黏土在青藏高原多年冻土地区广泛分布,为了充分认识其在冻结状态下的渗透性质,开展了一系列渗透试验测量了在-0.6℃~0.1℃条件下含水率为50%的青藏粉质黏土的渗透系数。结果显示：在高负温区间内,冻结粉质黏土的渗透系数处于8.22×10^-11~7.19×10^-9 cm/s 之间;另外,渗透系数与土温之间呈现出幂函数关系,土温越接近于0℃,渗透系数增大越快;冻土的渗透系数表现出随着未冻水体积含量的增加而快速增大的趋势。渗透性的存在可测意味着高温冻土在外荷载下会存在固结作用。
- 青藏粉质黏土 /
- 高温冻土 /
- 渗透系数 /
- 渗透介质
Abstract: In order to cognize the permeable property of the frozen silty clay spreading widely in permafrost regions on the Qinghai-Tibet Plateau, a series of laboratory tests are conducted to measure the hydraulic conductivities of the frozen silty clays with moisture content of 50% at temperatures from -0.6 to 0.1^oC. The results show that under the warm negative temperatures, the hydraulic conductivities of frozen silty clay are in the range of 8.22×10^-11~7.19×10^-9 cm/s. In addition, the hydraulic conductivity has a power function relationship with the soil temperature, and it grows more rapidly as the temperature gets closer to 0^oC. And the hydraulic conductivity expresses a rapid increase tendency with the increasing volumetric content of unfrozen water. The existence and measurability of the permeability in frozen soils indicate that consolidation may occur in warm frozen soils under external loads.
- Qinghai-Tibet Plateau silty clay /
- warm frozen soil /
- hydraulic conductivity /
- permeable medium

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冻结状态青藏粉质黏土的渗透系数测量研究 English Version

作者简介: 张虎（1986- ）,男,助理研究员,主要从事冻土力学及寒区工程等方面研究。E-mail: zhanghu@lzb.ac.cn。

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Measurement of hydraulic conductivity of Qinghai-Tibet Plateau silty clay under subfreezing temperatures

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作者简介:
张虎（1986- ）,男,助理研究员,主要从事冻土力学及寒区工程等方面研究。E-mail: zhanghu@lzb.ac.cn。