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Geotechnical and Geological Engineering

, Volume 37, Issue 5, pp 4527–4537 | Cite as

Study on Dynamic Tensile Strength of Red Sandstone Under Impact Loading and Negative Temperature

  • Renshu Yang
  • Shizheng FangEmail author
  • Dongming Guo
  • Weiyu Li
  • Zhuangzhuang Mi
Original Paper

Abstract

In western China, red sandstone is widely distributed. This type of rock is susceptible to generate cracks after being disturbed, and thus becomes a communication channel for groundwater, which poses a great hidden danger in Engineering, such as shaft and tunnel construction. To solve this problem, artificial freezing method is applied to underground engineering. This article focuses on the dynamic tensile strength of red sandstone (RS) at negative temperatures. According to the actual freezing temperature in the site, the temperature range was set to − 5, − 10, − 20 °C in the test, and the rock at normal temperature was set as a control group. The results show that the tensile strength of RS at temperatures below zero is significantly greater than the tensile strength of rock at normal temperature, and − 10 °C is a turning point of rock strength. In order to reveal the mechanism of this change, the scanning electron microscopic (SEM) technique was used to observe the rock fragments after the rock rupture. It is found that the rock fracture patterns are closely related to the rock cement property and its environmental temperature.

Keywords

Dynamic tensile strength Frozen red sandstone SHPB Fracture pattern 

Abbreviations

BD

Brazilian disc

SHPB

Split Hopkinson pressure bar

RS

Red sandstone

FRS

Frozen red sandstone

SEM

Scanning electron microscope

XRD

X-ray diffraction

P-wave

Longitudinal wave

List of Symbols

εin

Incident wave strain

εtr

Transmitted wave strain

εre

Reflected wave strain

Ab

Cross-section area of SHPB bar

Eb

Young’s moduli of aluminum alloy

Cb

Elastic wave velocity of aluminum alloy

P

Maximum value of the quasi-static force

P1

Front end of specimen

P2

Rear end of specimen

π

Circular constant

D

Diameter of the specimen

B

Thickness of the lspecimen

σt

Quasi-static tensile strength

σt(t)

Dynamic tensile strength

\(\dot{\sigma }\)

Loading rate

Notes

Acknowledgements

The authors sincerely thank the National Key Research and Development Program of China (2016YFC0600903), and the National Natural Science Foundation of China (51774287) for their financial supports

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Renshu Yang
    • 1
    • 3
  • Shizheng Fang
    • 2
    Email author
  • Dongming Guo
    • 1
    • 2
  • Weiyu Li
    • 2
  • Zhuangzhuang Mi
    • 2
  1. 1.State Key Laboratory for Geo-mechanics and Deep Underground EngineeringChina University of Mining and TechnologyBeijingChina
  2. 2.School of Mechanics and Civil EngineeringChina University of Mining and TechnologyBeijingChina
  3. 3.School of Civil and Resource EngineeringUniversity of Science and Technology BeijingBeijingChina

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