EXPERIMENTAL STUDY ON TENSILE STRENGTH OF UNDISTUBED Q<sub>2</sub> LOESS FROM YANAN SHANNXI, CHINA

SUN Wei-yu; Liang Qing-guo; YAN Song-hong; OU Er⁃feng; SHAO Sen-lin

2015 Vol. 21, No. 3

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SUN Wei-yu, Liang Qing-guo, YAN Song-hong, OU Er⁃feng, SHAO Sen-lin. EXPERIMENTAL STUDY ON TENSILE STRENGTH OF UNDISTUBED Q2 LOESS FROM YANAN SHANNXI, CHINA[J]. Journal of Geomechanics, 2015, 21(3): 386-392.

Citation:

SUN Wei-yu, Liang Qing-guo, YAN Song-hong, OU Er⁃feng, SHAO Sen-lin. EXPERIMENTAL STUDY ON TENSILE STRENGTH OF UNDISTUBED Q₂ LOESS FROM YANAN SHANNXI, CHINA[J]. Journal of Geomechanics, 2015, 21(3): 386-392.

EXPERIMENTAL STUDY ON TENSILE STRENGTH OF UNDISTUBED Q₂ LOESS FROM YANAN SHANNXI, CHINA

1.
Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province, Lanzhou 730070, China
2.
School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

Received Date: 22 January 2015

Publish Date: 25 September 2015

Abstract

Abstract

The unconfined compressive and penetration tensile tests were conducted with different loading rates on undisturbed Q₂ loess from Baotashan Tunnel in Yan'an, Shanxi, and the impacts on the unconfined compressive strength and tensile strength were studied. It shows that the loading rates have a great impact on the compressive strength and tensile strength, which all increase with the increase of loading speed. The ratios of height to diameter have a great influence on the tensile strength of the Q₂ loess, when the ratio of height to diameter of the samples is about 1.0, the impact on the tensile strength tends to be relatively small. Therefore, when the tensile strength of loess is to be measured by axial unconfined penetration test, the ratio of height to diameter of the samples should be 1.0. Within the scope of the test loading rates, the loading rates have little effect on the ratios of compressive strength to tensile ratio for the undisturbed Q₂ loess in Baotashan tunnel, which vary between 9.88 and 13.68.
- undisturbed Q₂ loess /
- tensile strength /
- loading rate /
- ratio of compressive strength to tensile strength

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References

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