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Influence of Acid Rain Climate Environment on Deterioration of Shear Strength Parameters of Natural Residual Expansive Soil by Jin Chang; Yong-Fu Xu; Jie Xiao; Lei Wang; Jian-Qing Jiang; Jian-Xiong Guo is a Engineering article available to read on EtoBox.

What is Influence of Acid Rain Climate Environment on Deterioration of Shear Strength Parameters of Natural Residual Expansive Soil about?

Shallow landslides often occur on expansive soil cutting slopes especially during continuous rainy, causing traffic disruptions and enormous economic losses.This study experimentally investigated the effects of acid rain climate environment on the shear strength parameters of natural residual expansive soil (NRES). Firstly, the effects of the acid rain (pH=3, 5, and 7) and wet-dry (W-D) cycles(n=0, 2, 4, and 6) on the shear strength parameters of the NRES were studied by the direct shear test. Secondly, the changes in the microstructure and mineral composition of the NRES was studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Finally, the mechanisms behind the shear strength loss of the NRES under acid rain and W-D cycles were considered. The direct shear test results revealed that acid rain and W-D cycles could accelerate the decline of shear strength of NRES, with the most apparent decrease under the first two W-D cycles . After two W-D cycles , the cohesion (c) of the soil samples under the acid rain with pH=5 and 3 is 15.2% and 31.2% lower than that under the solution with pH=7, respectively, while the internal friction angles (φ) of the so

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Author

Jin Chang; Yong-Fu Xu; Jie Xiao; Lei Wang; Jian-Qing Jiang; Jian-Xiong Guo

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)