Degradation of Typical Reverse Sand-Mudstone Interbedded Bank Slope Based on Multi-Source Field Experiments

Zhenwei Dai, Luqi Wang (), Xiaolin Fu, Bolin Huang, Senlin Zhang, Xuecheng Gao and Xiangrong He
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Zhenwei Dai: Wuhan Center, China Geological Survey (Central South China Innovation Center for Geosciences), Wuhan 430205, China
Luqi Wang: School of Civil Engineering, Chongqing University, Chongqing 400045, China
Xiaolin Fu: Wuhan Center, China Geological Survey (Central South China Innovation Center for Geosciences), Wuhan 430205, China
Bolin Huang: Hubei Key Laboratory of Disaster Prevention and Mitigation, China Three Gorges University, Yichang 443002, China
Senlin Zhang: Hubei Key Laboratory of Disaster Prevention and Mitigation, China Three Gorges University, Yichang 443002, China
Xuecheng Gao: School of Civil Engineering, Chongqing University, Chongqing 400045, China
Xiangrong He: School of Civil Engineering, Chongqing University, Chongqing 400045, China

IJERPH, 2023, vol. 20, issue 3, 1-24

Abstract: The bank slopes in the Three Gorges Reservoir area (TGRA) have experienced obvious deterioration under the action of the periodic fluctuations in the reservoir water level. Generally, laboratory tests have been used to reveal the evolution trend of the slope banks. However, this method has a certain degree of cross-scale problem, especially for the mechanical state in a complex environment. Therefore, in this study, we took the Yangjiaping bank slope in the TGRA as an example and proposed a comprehensive on-site detection method to further reveal the rock mass degradation phenomenon of this typical reverse sand-mudstone interbedded bank slope. Specifically, multi-scale laser scanning, cross-hole acoustic wave detection, and inclination measurements were performed to analyze the fractures, quality, and deformation of rocky banks. The results showed that the deterioration of the bank slope manifested as the expansion, deepening, and widening of the cracks, as well as the peeling off and loosening of rocky banks. Large-scale laser scanning revealed that the deterioration zone was deformed along large fracture zones and layers. Unlike limestone slopes, the intact sandstone underground might be degraded by changes in water. There are few inclinometers and no deformation or weak deformation, which requires long-term monitoring. The relevant research methods provide an important reference for determining the instability and failure trend of the reservoir bank slopes.

Keywords: evolution process; the Three Gorges Reservoir Area; field test; rocky bank; reverse sand-mudstone interbed slope (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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