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Published in: Bulletin of Engineering Geology and the Environment 4/2021

22-02-2021 | Original Paper

Mechanical behavior and decay model of the sandstone in Urumqi under coupling of freezethaw and dynamic loading

Authors: Junce Xu, Hai Pu, Ziheng Sha

Published in: Bulletin of Engineering Geology and the Environment | Issue 4/2021

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Abstract

In cold regions, recurrent freeze–thaw action and loading conditions are important factors affecting the long-term durability of natural rocks in engineering systems. This study explores the effects of freeze-thaw action and strain rate on the mechanical behavior of the sandstone retrieved from Urumqi areas of western China. In addition, a decay function model was built for predicting the mechanical degradation and durability of the tested rock based on the P-wave velocity results. The results suggest that the mechanical properties of samples under either static or dynamic loading decrease with the increase in freeze-thaw action. However, the enhancement influence of the strain rate on dynamic compression strength and deformation modulus under freeze-thaw action still exists and increases with the increasing strain rate. Moreover, under the same dynamic loading, increasing in freeze-thaw action can aggravate the fragmentation degree of the tested sample. The proposed decay model is in good agreement with the data measured in the tests, and the model can accurately describe the influences of freeze-thaw action and strain rate on deterioration responses of the rock. Thus, this decay model can be used to obtain better predictions of the long-term durability of tested rocks under the effect of freeze–thaw action and strain rate.

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Literature
go back to reference Li X (2014) Rock dynamic fundamentals and applications. Science Press, Beijing Li X (2014) Rock dynamic fundamentals and applications. Science Press, Beijing
go back to reference Sun L (2016) Structural evolution and rock pressure activity regularity of weakly cemented strata of the large mining height work face in Western China. University of Science and Technology, Beijing Sun L (2016) Structural evolution and rock pressure activity regularity of weakly cemented strata of the large mining height work face in Western China. University of Science and Technology, Beijing
go back to reference Wang B, Li XB (2012) Mesomechanics analysis of static compressive strength and dynamic compressive strength of water-saturated rock under uniaxial load. Baozha Yu Chongji/Explosion Shock Waves 32:423–431 Wang B, Li XB (2012) Mesomechanics analysis of static compressive strength and dynamic compressive strength of water-saturated rock under uniaxial load. Baozha Yu Chongji/Explosion Shock Waves 32:423–431
Metadata
Title
Mechanical behavior and decay model of the sandstone in Urumqi under coupling of freeze–thaw and dynamic loading
Authors
Junce Xu
Hai Pu
Ziheng Sha
Publication date
22-02-2021
Publisher
Springer Berlin Heidelberg
Published in
Bulletin of Engineering Geology and the Environment / Issue 4/2021
Print ISSN: 1435-9529
Electronic ISSN: 1435-9537
DOI
https://doi.org/10.1007/s10064-021-02133-5

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