Long-term strength of frozen saline soils
There are many experimental methods for determining the strength of frozen soils. However, the experimental period is always much shorter than the period of infrastructure facilities operation on permafrost. Hence, one of the main tasks of the frozen soils mechanics is the development of methods for...
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Peter the Great St. Petersburg Polytechnic University
2022
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ftdoajarticles:oai:doaj.org/article:e1a41ae471ff45d3a8ca8d77ed1eeb06 2023-05-15T17:57:51+02:00 Long-term strength of frozen saline soils Kotov Pavel Stanilovskaya Julia 2022-08-01T00:00:00Z https://doi.org/10.34910/MCE.113.7 https://doaj.org/article/e1a41ae471ff45d3a8ca8d77ed1eeb06 EN eng Peter the Great St. Petersburg Polytechnic University http://engstroy.spbstu.ru/article/2022.113.07/ https://doaj.org/toc/2712-8172 2712-8172 doi:10.34910/MCE.113.7 https://doaj.org/article/e1a41ae471ff45d3a8ca8d77ed1eeb06 Magazine of Civil Engineering, Vol 113, Iss 05 (2022) mechanical properties strength temperature testing forecasting frozen saline soil spherical template indenter test time analogy method equivalent cohesion Engineering (General). Civil engineering (General) TA1-2040 article 2022 ftdoajarticles https://doi.org/10.34910/MCE.113.7 2022-12-30T21:08:11Z There are many experimental methods for determining the strength of frozen soils. However, the experimental period is always much shorter than the period of infrastructure facilities operation on permafrost. Hence, one of the main tasks of the frozen soils mechanics is the development of methods for prediction of long-term strength. The aim of the research is selection of equations for long-term strength prediction of frozen saline soils. The selection is carried out based on spherical template indenter test (STI) using artificial samples of two soil types (fine sand, loam) with different salinity (from 0.07% to 1.42%), water content and temperature (-2°C, -4°C,-6°C). There were 200 experimental tests. Two approaches with 10 empirical equations and time analogy method were used for long-term strength prediction. As a result, only four equations satisfied the selection criteria and can be used for the long-term strength calculations. Our studies have shown the possibility of using the time analogy method for saline frozen soils. Calculated values of equivalent cohesion for a saline-time analogy as well as for a temperature-time analogy were within confidence interval: 90% and 80% of values respectively. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles |
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Directory of Open Access Journals: DOAJ Articles |
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topic |
mechanical properties strength temperature testing forecasting frozen saline soil spherical template indenter test time analogy method equivalent cohesion Engineering (General). Civil engineering (General) TA1-2040 |
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mechanical properties strength temperature testing forecasting frozen saline soil spherical template indenter test time analogy method equivalent cohesion Engineering (General). Civil engineering (General) TA1-2040 Kotov Pavel Stanilovskaya Julia Long-term strength of frozen saline soils |
topic_facet |
mechanical properties strength temperature testing forecasting frozen saline soil spherical template indenter test time analogy method equivalent cohesion Engineering (General). Civil engineering (General) TA1-2040 |
description |
There are many experimental methods for determining the strength of frozen soils. However, the experimental period is always much shorter than the period of infrastructure facilities operation on permafrost. Hence, one of the main tasks of the frozen soils mechanics is the development of methods for prediction of long-term strength. The aim of the research is selection of equations for long-term strength prediction of frozen saline soils. The selection is carried out based on spherical template indenter test (STI) using artificial samples of two soil types (fine sand, loam) with different salinity (from 0.07% to 1.42%), water content and temperature (-2°C, -4°C,-6°C). There were 200 experimental tests. Two approaches with 10 empirical equations and time analogy method were used for long-term strength prediction. As a result, only four equations satisfied the selection criteria and can be used for the long-term strength calculations. Our studies have shown the possibility of using the time analogy method for saline frozen soils. Calculated values of equivalent cohesion for a saline-time analogy as well as for a temperature-time analogy were within confidence interval: 90% and 80% of values respectively. |
format |
Article in Journal/Newspaper |
author |
Kotov Pavel Stanilovskaya Julia |
author_facet |
Kotov Pavel Stanilovskaya Julia |
author_sort |
Kotov Pavel |
title |
Long-term strength of frozen saline soils |
title_short |
Long-term strength of frozen saline soils |
title_full |
Long-term strength of frozen saline soils |
title_fullStr |
Long-term strength of frozen saline soils |
title_full_unstemmed |
Long-term strength of frozen saline soils |
title_sort |
long-term strength of frozen saline soils |
publisher |
Peter the Great St. Petersburg Polytechnic University |
publishDate |
2022 |
url |
https://doi.org/10.34910/MCE.113.7 https://doaj.org/article/e1a41ae471ff45d3a8ca8d77ed1eeb06 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Magazine of Civil Engineering, Vol 113, Iss 05 (2022) |
op_relation |
http://engstroy.spbstu.ru/article/2022.113.07/ https://doaj.org/toc/2712-8172 2712-8172 doi:10.34910/MCE.113.7 https://doaj.org/article/e1a41ae471ff45d3a8ca8d77ed1eeb06 |
op_doi |
https://doi.org/10.34910/MCE.113.7 |
_version_ |
1766166366213111808 |