Effect of Water Content and Strain Rate on the Strength Characteristics of Frozen Silty Clay
[1]Zhang Yaqin,Yang Ping,Jiang Wangyang,et al.Effect of Water Content and Strain Rate on the Strength Characteristics of Frozen Silty Clay[J].Journal of Zhengzhou University (Engineering Science),2020,41(03):79-84.[doi:10.13705/j.issn.1671-6833.2020.02.006]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
41
Number of periods:
2020 03
Page number:
79-84
Column:
Public date:
2020-07-29
- Title:
- Effect of Water Content and Strain Rate on the Strength Characteristics of Frozen Silty Clay
- Keywords:
- Artificially frozen silty clay; moisture content; loading rate; strength properties; modulus of resilience
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2020.02.006
- Abstract:
- Artificial frozen soil uniaxial compressive strength and elastic modulus is the key parameters of artificial freezing method design, accurate understanding of the change rule is extremely important.So the experimental study on uniaxial compression strength of artificial frozen soil with silty clay was carried out under the conditions of different water content and strain rate. The results show that most samples showed drum type failure, with the increase of water content, the stress-strain curve gradually change from stress softening to stress hardening. There is an optimum moisture content to peak strength, for Nanjing typical silty clay the moisture content is 22%, close to saturation moisture content; elastic modulus of remolded silty clay increased with water content increasing, but the growth rate declined; the uniaxial compressive strength and elastic modulus decrease with increasing strain rate; The resilient modulus increases gradually with the increase of loading and unloading times, when loading and unloading times up to 7 times, the resilient modulus is basically stable. The stress - strain curve of the remolded soil specimen is more smooth than the original soil sample, and the compressive strength and modulus of elasticity are improved.
- References:
- -
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Last Update:
2020-07-29