Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Geomechanics and Engineering Volume 34, Number 5, September10 2023 , pages 473-480 DOI: https://doi.org/10.12989/gae.2023.34.5.473 |
|
|
|
Mechanism of strength damage of red clay roadbed by acid rain |
||
Guiyuan Xiao, Jian Wang, Le Yin, Guangli Xu and Wei Liu
|
||
| Abstract | ||
| Acid rain of soils has a significant impact on mechanical properties. An X-ray diffraction test, scanning electron microscope (SEM) test, laser particle size analysis test, and triaxial unconsolidated undrained (UU) test were carried out in red clay soils with different compaction degrees under the effect of different concentrations of acid. The experiments demonstrated that: the dissolution effect of acid rain on colluvium weakened with the increase in the compacting degree under the condition of certain pH values, i.e., the damage to the structure of red clay soil was relatively light, where the number of newly increased pores in the soil decreased and the agglomeration of soil particles increased; for the same compacting degree, the structural gap decreased, and the agglomeration increased with the increase in the pH value (acidity decreases) of the acid rain; the dissolution rate of Si, Al, Fe, and other elemental minerals and cement in red clay soil was found to be higher under the effect of acid rain, in turn destroying the original structure of the soil body and producing a large number of pores. This is macroscopically expressed as the decrease of the soil cohesion and internal friction angle, thereby reducing the shear strength of the soil body. | ||
| Key Words | ||
| acid rain; red clay soils; roadbed diseases | ||
| Address | ||
| Guiyuan Xiao: Key Laboratory of Geotechnics of Guangxi, Guilin University of Technology, Guilin, Guangxi 541004, China; College of Engineering, China University of Geosciences, Wuhan, Hubei 430000, China Jian Wang: Key Laboratory of Geotechnics of Guangxi, Guilin University of Technology, Guilin, Guangxi 541004, China Le Yin: Guangxi Zhuang Autonomous Region company of China National Tobacco Corporation 530000, China Guangli Xu: College of Engineering, China University of Geosciences, Wuhan, Hubei 430000, China Wei Liu: Shiyan City Natural Resources and Planning Bureau, Shiyan, Hubei 442099, China | ||