Author(s)

Xu Feng ¹, Shuangyang Cai ¹, Ming Zhou ¹

Affiliation(s)

¹ Hunan Institute of Traffic Engineering, Hengyang, China

Corresponding Author

Xu Feng

ABSTRACT

According to statistics, more than 90% of landslide accidents are closely related to the action of water. To determine the damage mechanism of binary structure landslide under rainfall conditions, the numerical model of binary structure slope under strong rainfall conditions is established by the finite element software Midas-GTS, relying on the slope project of an industrial park in Hunan. By studying the changes in stability safety factor, stress field, and seepage field of the slope in the process of heavy rainfall, the damage mechanism of the binary structure slope under the condition of heavy rainfall is analyzed and deduced. The results show that the damage of binary structure landslide can be divided into four evolutionary processes: (1) Nurturing stage: After excavation and slope cutting, the strongly weathered layer and part of the medium weathered layer of mudstone are exposed to the air, and the rocks will be deformed after long-term weathering and water immersion, resulting in the reduction of their strength; (2) Cracking stage: As time passes, surface water continues to penetrate downward along the fissures and soil traps, resulting in the formation of multiple penetrating fissures inside the soil body. formation of multiple penetrating fissures; (3) Creep phase: Frequent heavy rainfall causes the geotechnical body to gradually saturate, the overlying load continues to increase, the driving force of the landslide also continues to increase, the mudstone further softens, the geotechnical body shear strength decreases, and the slip zone gradually develops downward; (4) Sliding phase: Long-term precipitation causes the geotechnical body near the slip surface shear strength decreases, insufficient to support the upper load, the slip surface gradually develops through (4) Sliding stage: Long-term precipitation causes the shear strength of the geotechnical body near the slip surface to decrease, which is insufficient to support the upper load, and the slip surface gradually develops through.

KEYWORDS

Slope engineering, heavy rainfall, binary structures, landslide damage mechanism, finite element simulation

CITE THIS PAPER

Xu Feng, Shuangyang Cai, Ming Zhou, Analysis of Landslide Damage Mechanisms and Control Options for Binary Structures under Heavy Rainfall Conditions. Journal of Civil Engineering and Urban Planning (2022) Vol. 4: 23-31. DOI: http://dx.doi.org/10.23977/jceup.2022.040304.

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