Tensile Characteristics of Fully Weathered Phyllite Soil

LIU Li; ZHANG Qin; YAN Rongtao; ZHAO Yanping; JIANG Dawei

doi:10.13204/j.gyjzG21112405

Volume 52 Issue 12

Dec. 2022

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LIU Li, ZHANG Qin, YAN Rongtao, ZHAO Yanping, JIANG Dawei. Tensile Characteristics of Fully Weathered Phyllite Soil[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(12): 166-170. doi: 10.13204/j.gyjzG21112405

Citation:

LIU Li, ZHANG Qin, YAN Rongtao, ZHAO Yanping, JIANG Dawei. Tensile Characteristics of Fully Weathered Phyllite Soil[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(12): 166-170. doi: 10.13204/j.gyjzG21112405

LIU Li, ZHANG Qin, YAN Rongtao, ZHAO Yanping, JIANG Dawei. Tensile Characteristics of Fully Weathered Phyllite Soil[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(12): 166-170. doi: 10.13204/j.gyjzG21112405

Citation:

LIU Li, ZHANG Qin, YAN Rongtao, ZHAO Yanping, JIANG Dawei. Tensile Characteristics of Fully Weathered Phyllite Soil[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(12): 166-170. doi: 10.13204/j.gyjzG21112405

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Tensile Characteristics of Fully Weathered Phyllite Soil

doi: 10.13204/j.gyjzG21112405

1. Guangxi Key Laboratory of New Energy and Building Energy Saving, Guilin University of Technology, Guilin 541004, China;
2. Guilin University of Aerospace Technology, Guilin 541004, China;
3. Guilin Geological Engineering Investigation Institute of China Building Materials Group Limited Company, Guilin 541004, China

Received Date: 2021-11-12
Available Online: 2023-03-22

Abstract

Abstract

Taking fully weachered phyllite soil as a reserch object, the pressure plate method and saturated salt solution method were used to test the soil water characteristic curve(SWCC) in a wide suction range of phyllite weathered compaction soils with different dry densities. A uniaxial tensile tester was developed to study the tensile strength of specimens with different dry densities in a wide range of saturation, and combined with the mercury injection test to study tensile strength change trend. The experimental results showed that the tensile strength presented two peaks with increase of the water content, which were considered to be the results of the increased quantity of "liquid Bridges", capillary pressure and the stronger cementation force respectively. Besides, it was corresponding to the "double peak" structure of the compacted specimens in the mercury injection test. Analyzing the SWCC of soil specimens, it was shown that the higher the dry density of compacted soil specimens was, the lower the saturated water content was; the air entry value was larger, the tensile strength was higher. The results showed that the dry density and water content had different effects on tensile strength. Moreover, it was verified that the model could reasonably predict the tensile strength of fully weathered phyllite soils in the full saturation range with different dry densities.
- phyllite fully weathered soil,
- tensile strength,
- mercury injection test,
- "double peak" structure

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References(17)

References

[1]	张悼元, 王士天, 王兰生, 等.工程地质分析原理[M].北京:地质出版社, 2009.
[2]	汤连生, 桑海涛, 罗珍贵, 等.土体抗拉张力学特性研究进展[J].地球科学进展, 2015, 30(3):297-309.
[3]	TAMRAKAR S B, MITACHI T, TOYOSAWA Y, et al. Development of a new soil tensile strength test apparatus[C]//Geo-frontiers Congress. 2005.
[4]	LU N, WU B, TAN C P. Tensile strength characteristics of unsaturated sands[J]. Journal of Geotechnical and Geo-Environmental Engineering, 2007, 133(2):144-154.
[5]	KIM T H, STURE S. Capillary-induced tensile strength in unsaturated sands[J]. Canadian Geotechnical Journal, 2008, 45(5):726-737.
[6]	蔡国庆, 车睿杰, 孔小昂, 等.非饱和砂土抗拉强度的试验研究[J].水利学报, 2017, 48(5):623-630.
[7]	吕海波, 曾召田, 葛若东, 等.胀缩性土抗拉强度试验研究[J].岩土力学, 2013, 34(3):615-620 , 638.
[8]	袁志辉, 倪万魁, 唐春, 等.干湿循环效应下黄土抗拉强度试验研究[J].岩石力学与工程学报, 2017, 36(增刊1):3670-3677.
[9]	SCHUBERT H. Tensile strength of agglomerates[J]. Powder Technology, 1975, 11(2):107-119.
[10]	牛庚, 孙德安, 韦昌富, 等.基于孔径分布的全风化泥岩持水曲线推算[J].岩土力学, 2018, 39(4):1337-1345.
[11]	VAN GENUCHTEN M T. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils[J]. Soil Science Society of America Journal, 1980, 44:892-898.
[12]	田慧会, 韦昌富, 魏厚振, 等. 压实黏质砂土脱湿过程影响机制的核磁共振分析[J].岩土力学, 2014, 3(8):2129-2136.
[13]	LU N, GODT J W, WU D T. A closed-form equation for effective stress in unsaturated soil[J]. Water Resources Research, 2010, 46(5):1-14.
[14]	KODIKARA J, BARBOUR S L, FREDLUND D G. Changein clay structure behavior due to wetting and drying[C]//Proceedings of 8th Australian-Zealand Conference on Geomechanics. 1999:179-185.
[15]	WASHBURN E W. Note on a method of determining the distribution of pore sizes in a porous material[C]//Proceedings of the National Academy of Sciences of the United States of America. 1921:115-116.
[16]	LIKOS W J. Effective stress in unsaturated soil:accounting for surface tension and interfacial area[J]. Vadose Zone Journal, 2014. 13(5). https://doi.org/10.2136/vzj2013.05.0095.
[17]	VANAPALLI S K, FREDLUND D G, Comparison of different procedures to predict unsaturated soil shear strength[C]//Proceedings of Geo-Denver. 2000:195-209.