An investigation of pore water pressure and consolidation phenomenon in the unfrozen zone during soil freezing
文献类型：期刊论文
| 作者 | Zhang, Lianhai1,2; Ma, Wei1; Yang, Chengsong1; Wen, Zhi1; Dong, Sheng3 |
| 刊名 | Cold regions science and technology
 |
| 出版日期 | 2016-10-01 |
| 卷号 | 130页码:21-32 |
| 关键词 | Pore water pressure Vacuum-induced consolidation Frost heaving stress Water expulsion The unfrozen zone Frost heave |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2016.07.007 |
| 通讯作者 | Ma, wei(mawei@lzb.ac.cn) |
| 英文摘要 | Accurate modeling of soil deformation depends on the consideration of both frost heave deformation in the frozen zone and consolidation deformation in the unfrozen zone. pore water pressure investigations are important for revealing these two deformation behaviors. herein, we aim to reveal the consolidation process by measuring and analyzing changes in pore water pressure in the unfrozen zone. using a custom-made pore water pressure gauge, we performed a series of real-time pore water pressure measurements in the unfrozen zone of silty clay and sandy soil samples that were exposed to closed and open freezing systems. the results show that the pore water pressure in the unfrozen zone generally increases at first and then decreases. the temperature changes in the unfrozen zone have no significant influence on the changes in pore water pressure, and the variations of the pore water pressure are mainly controlled by the stress and hydraulic boundary (changes in pore water pressure) conditions at the freezing front. furthermore, changes in the pore water pressure are affected by several parameters, including soil type, water supply condition, initial moisture content, measured soil layer depth, and hydraulic conductivity. soil consolidation is mainly caused by change in effective stress, which results from increase in total stress or decrease in pore pressure. based on the observed pore water pressure variations and its numerical simulations, we propose that consolidation in the unfrozen zone during soil freezing includes compression-induced consolidation, which results from an increase in frost heaving stress, and vacuum induced consolidation, which results from a decrease in pore water pressure. each consolidation pattern plays an important role in the different stages of soil freezing. compression-induced consolidation primarily occurs during the early stage of soil freezing, while vacuum-induced consolidation mainly occurs during the later stage of soil freezing. (c) 2016 elsevier b.v. all rights reserved. |
| WOS关键词 | PARTIALLY FROZEN SOIL ; FINE-GRAINED SOILS ; FROST HEAVE ; POROUS-MEDIA ; ICE ; VACUUM ; MODEL ; EXPULSION ; PHYSICS |
| WOS研究方向 | Engineering ; Geology |
| WOS类目 | Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000383300400003 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2376295 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Ma, Wei |
| 作者单位 | 1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Beijing Univ Technol, Coll Civil Engn, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Lianhai,Ma, Wei,Yang, Chengsong,et al. An investigation of pore water pressure and consolidation phenomenon in the unfrozen zone during soil freezing[J]. Cold regions science and technology,2016,130:21-32. |
| APA | Zhang, Lianhai,Ma, Wei,Yang, Chengsong,Wen, Zhi,&Dong, Sheng.(2016).An investigation of pore water pressure and consolidation phenomenon in the unfrozen zone during soil freezing.Cold regions science and technology,130,21-32. |
| MLA | Zhang, Lianhai,et al."An investigation of pore water pressure and consolidation phenomenon in the unfrozen zone during soil freezing".Cold regions science and technology 130(2016):21-32. |
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来源：中国科学院大学
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