Effect of freeze-thaw cycles and water content on the mechanical properties of moraine soil
Objective Moraine soil in seasonal permafrost areas is significantly affected by freeze-thaw cycles, which greatly affects the stability and safety of projects. Methods To investigate the effect of freeze-thaw cycles and water content on the static mechanical properties of the soil, the influence of...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | Chinese |
Published: |
Editorial Department of Bulletin of Geological Science and Technology
2024
|
Subjects: | |
Online Access: | https://doi.org/10.19509/j.cnki.dzkq.tb20220649 https://doaj.org/article/70e8c2c72f414b02ad3771c53f1b0bad |
id |
ftdoajarticles:oai:doaj.org/article:70e8c2c72f414b02ad3771c53f1b0bad |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:70e8c2c72f414b02ad3771c53f1b0bad 2024-09-15T18:30:11+00:00 Effect of freeze-thaw cycles and water content on the mechanical properties of moraine soil Tingting JIANG Huali PAN Yifan AI Wei XIONG 2024-03-01T00:00:00Z https://doi.org/10.19509/j.cnki.dzkq.tb20220649 https://doaj.org/article/70e8c2c72f414b02ad3771c53f1b0bad ZH chi Editorial Department of Bulletin of Geological Science and Technology https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.tb20220649 https://doaj.org/toc/2096-8523 2096-8523 doi:10.19509/j.cnki.dzkq.tb20220649 https://doaj.org/article/70e8c2c72f414b02ad3771c53f1b0bad 地质科技通报, Vol 43, Iss 2, Pp 238-252 (2024) moraine soil freeze-thaw cycles water content mechanical property attenuation pattern Geology QE1-996.5 Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 article 2024 ftdoajarticles https://doi.org/10.19509/j.cnki.dzkq.tb20220649 2024-08-05T17:49:34Z Objective Moraine soil in seasonal permafrost areas is significantly affected by freeze-thaw cycles, which greatly affects the stability and safety of projects. Methods To investigate the effect of freeze-thaw cycles and water content on the static mechanical properties of the soil, the influence of freeze-thaw cycles and water content on the mechanical parameters of Hailuogou moraine soil was studied via an unconsolidated-undrained triaxial test. Results The results show that the stress-strain curves of the moraine soil before and after freeze-thaw cycling exhibit weak strain softening. With an increase in the number of freeze-thaw cycles, the elastic modulus and shear strength of the moraine soil first rapidly decrease and subsequently tend to stabilize. The higher the water content is, the greater the decay degree of the mechanical parameters. As the number of freeze-thaw cycles increases, the cohesion decreases exponentially, while the friction angle does not change significantly. The exponential function is thus adopted for multiple nonlinear fittings of the shear strength and elastic modulus. The relationship between mechanical parameters and confining conditions pressure, water content, and freeze-thaw cycles are obtained and show good correlation, which can be used to deduce the mechanical parameters of moraine soil after freeze-thaw cycles. The freeze-thaw cycles weaken the mechanical properties of moraine soil, and the higher the water content is, the greater the degree of attenuation. Conclusion The obtained results and analyses can provide scientific support for engineering design and construction in alpine regions. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Chinese |
topic |
moraine soil freeze-thaw cycles water content mechanical property attenuation pattern Geology QE1-996.5 Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 |
spellingShingle |
moraine soil freeze-thaw cycles water content mechanical property attenuation pattern Geology QE1-996.5 Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 Tingting JIANG Huali PAN Yifan AI Wei XIONG Effect of freeze-thaw cycles and water content on the mechanical properties of moraine soil |
topic_facet |
moraine soil freeze-thaw cycles water content mechanical property attenuation pattern Geology QE1-996.5 Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 |
description |
Objective Moraine soil in seasonal permafrost areas is significantly affected by freeze-thaw cycles, which greatly affects the stability and safety of projects. Methods To investigate the effect of freeze-thaw cycles and water content on the static mechanical properties of the soil, the influence of freeze-thaw cycles and water content on the mechanical parameters of Hailuogou moraine soil was studied via an unconsolidated-undrained triaxial test. Results The results show that the stress-strain curves of the moraine soil before and after freeze-thaw cycling exhibit weak strain softening. With an increase in the number of freeze-thaw cycles, the elastic modulus and shear strength of the moraine soil first rapidly decrease and subsequently tend to stabilize. The higher the water content is, the greater the decay degree of the mechanical parameters. As the number of freeze-thaw cycles increases, the cohesion decreases exponentially, while the friction angle does not change significantly. The exponential function is thus adopted for multiple nonlinear fittings of the shear strength and elastic modulus. The relationship between mechanical parameters and confining conditions pressure, water content, and freeze-thaw cycles are obtained and show good correlation, which can be used to deduce the mechanical parameters of moraine soil after freeze-thaw cycles. The freeze-thaw cycles weaken the mechanical properties of moraine soil, and the higher the water content is, the greater the degree of attenuation. Conclusion The obtained results and analyses can provide scientific support for engineering design and construction in alpine regions. |
format |
Article in Journal/Newspaper |
author |
Tingting JIANG Huali PAN Yifan AI Wei XIONG |
author_facet |
Tingting JIANG Huali PAN Yifan AI Wei XIONG |
author_sort |
Tingting JIANG |
title |
Effect of freeze-thaw cycles and water content on the mechanical properties of moraine soil |
title_short |
Effect of freeze-thaw cycles and water content on the mechanical properties of moraine soil |
title_full |
Effect of freeze-thaw cycles and water content on the mechanical properties of moraine soil |
title_fullStr |
Effect of freeze-thaw cycles and water content on the mechanical properties of moraine soil |
title_full_unstemmed |
Effect of freeze-thaw cycles and water content on the mechanical properties of moraine soil |
title_sort |
effect of freeze-thaw cycles and water content on the mechanical properties of moraine soil |
publisher |
Editorial Department of Bulletin of Geological Science and Technology |
publishDate |
2024 |
url |
https://doi.org/10.19509/j.cnki.dzkq.tb20220649 https://doaj.org/article/70e8c2c72f414b02ad3771c53f1b0bad |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
地质科技通报, Vol 43, Iss 2, Pp 238-252 (2024) |
op_relation |
https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.tb20220649 https://doaj.org/toc/2096-8523 2096-8523 doi:10.19509/j.cnki.dzkq.tb20220649 https://doaj.org/article/70e8c2c72f414b02ad3771c53f1b0bad |
op_doi |
https://doi.org/10.19509/j.cnki.dzkq.tb20220649 |
_version_ |
1810471655721402368 |