Effects of mixing sand on unconfined compressive strength of soil in collapsing gully

Huang Qiannan; Zhang Xiaoming; Wei Jie; Zhang Ziyou; Hu Jie

doi:10.12171/j.1000-1522.20180235

Journal of Beijing Forestry University > 2020 > 42(1): 114-120. > DOI: 10.12171/j.1000-1522.20180235

Huang Qiannan, Zhang Xiaoming, Wei Jie, Zhang Ziyou, Hu Jie. Effects of mixing sand on unconfined compressive strength of soil in collapsing gully[J]. Journal of Beijing Forestry University, 2020, 42(1): 114-120. DOI: 10.12171/j.1000-1522.20180235

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Effects of mixing sand on unconfined compressive strength of soil in collapsing gully

1.
School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
2.
College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, Hubei, China

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Received Date: July 18, 2018
Revised Date: December 13, 2018
Available Online: November 05, 2019
Published Date: January 13, 2020

Graphical Abstract

Abstract

Abstract

ObjectiveIn order to study the mechanics characteristic of colluvial deposits of collapsing gully, soil simulation of the collapsing had been made and the unconfined compressive strength was measured.
MethodTwo methods to mix the sand and soil and different sand content were taken.
ResultThe results showed that unconfined compressive strength reducted along with the reduction of sand content because of the lesser axial stress. From 0% to 100% of sand content, unconfined compressive strength reduction from 71.1 kPa to 14.6 kPa. The specimen mixed sand to soil with separated layer destroyed seriously and the strength was smaller result to the unstable substratum. The highest strength occurred to the specimen which was low sand content and mixed uniformly.
ConclusionMixing sand dramatically reduces the unconfined compressive strength of soil in collapsing gully. Under the same sand content circumstances, specimen mixed uniformly has a high strength and brittle failure at the end of test.
- mode of mix sand,
- sand content,
- collapsing gully,
- unconfined compressive strength,
- the second collapse

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References (23)

References

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Effects of mixing sand on unconfined compressive strength of soil in collapsing gully