IMHE OpenIR  > 山地灾害与地表过程重点实验室
Zhang Chonglei1; Jiang Guanlu2; Su Lijun1; Liu Weiming1
Source Publicationjournalofmountainscience
AbstractThe construction of a high-speed railway (HSR) in Southwest China is being hindered by a severe shortage of high-quality subgrade materials. However, red mudstone is widely distributed in the Sichuan Basin of China. The ability to use weathered red mudstone (WRM) to fill subgrade beds by controlling its critical stress and cumulative strain would enable substantial savings in project investments and mitigate damage to the ecological environment. To better understand the dynamic behaviour of WRM, both monotonic and cyclic triaxial tests were performed. The evolution of the cumulative strain vs. increased loading cycles was measured. The influences of confining pressure and loading cycles on the dynamic modulus, damping ratio, critical cyclic stress ratio (CSR), and dynamic stress level (DSL) were investigated. The relationship between the CSR and loading cycles under different failure strain criteria (0.1%-1.0%) was analysed. The prediction model of cumulative strain was also evaluated. The results indicated that the shear strength of WRM sufficiently meets the static strength requirements of subgrade. The critical dynamic stress of WRM can thus satisfy the dynamic stress-bearing requirement of the HSR subgrade. The critical CSR decreases and displays a power function with increasing confining pressure. As the confining pressure increases, the DSL remains relatively stable, ranging between 0.153 and 0.163. Furthermore, the relationship between the dynamic strength and loading cycles required to cause failure was established. Finally, a newly developed model for determining cumulative strain was established. A prediction exercise showed that the model is in good agreement with the experimental data.
Funding Project[CAS "Light of West China" Program] ; [National Natural Science Foundation of China] ; [Sichuan science and technology plan project]
Document Type期刊论文
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Zhang Chonglei,Jiang Guanlu,Su Lijun,et al. dynamicbehaviourofweatheredredmudstoneinsichuanchinaundertriaxialcyclicloading[J]. journalofmountainscience,2018,15(8):1789.
APA Zhang Chonglei,Jiang Guanlu,Su Lijun,&Liu Weiming.(2018).dynamicbehaviourofweatheredredmudstoneinsichuanchinaundertriaxialcyclicloading.journalofmountainscience,15(8),1789.
MLA Zhang Chonglei,et al."dynamicbehaviourofweatheredredmudstoneinsichuanchinaundertriaxialcyclicloading".journalofmountainscience 15.8(2018):1789.
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