Study on the deterioration trend of the rock mass on the reservoir banks under dry-wet cycles

The deterioration of rock mass under dynamic mechanical state is difficult to determine, especially when evolution trends of micro-fractures are considered. Taking the limestone from Wuxia section of the Three Gorges Reservoir area as studying case, cross-scale tests and theoretical analysis were adopted to study the influence of dry-wet cycles on rock deterioration. The weakly acidic condition (pH = 6) and the dry environment at 105°C were together constituted the two extreme mechanical states of the dry-wet cycles. Meanwhile, the number of dry-wet cycles and soaking time were used as the main variables to analyze the deterioration trend. After introducing the damage mechanics, the quantitative relationship between the mechanical parameters and changing mechanical states was obtained. Combined with the microstructure obtained by scanning electron microscope (SEM), it can be found that with the increase of dry-wet cycles and soaking time, the morphology of mineral particles changed, the number of secondary pores gradually increased, the surface structure became looser, and the microcracks gradually increased, causing the decrease of macro strength. The related method proposed in this paper could provide significant references to determine the mechanical parameters of rocky reservoir bank.

[1]  K. Gnyawali,et al.  Catastrophic air blasts triggered by large ice/rock avalanches , 2022, Landslides.

[2]  Cheng-xuan Tan,et al.  Ground fissure susceptibility mapping based on factor optimization and support vector machines , 2022, Bulletin of Engineering Geology and the Environment.

[3]  Jun He,et al.  Constitutive Model and Fracture Failure of Sandstone Damage under High Temperature–Cyclic Stress , 2022, Materials.

[4]  Zhenwei Dai,et al.  Evolution trend of the Huangyanwo rock mass under the action of reservoir water fluctuation , 2022, Natural Hazards.

[5]  Ying Cao,et al.  Enhanced dynamic landslide hazard mapping using MT-InSAR method in the Three Gorges Reservoir Area , 2022, Landslides.

[6]  Ying Cao,et al.  Characteristic comparison of seepage-driven and buoyancy-driven landslides in Three Gorges Reservoir area, China , 2022, Engineering Geology.

[7]  Yue-ping Yin,et al.  Research on the collapse process of a thick-layer dangerous rock on the reservoir bank , 2022, Bulletin of Engineering Geology and the Environment.

[8]  Wengang Zhang,et al.  Efficient Seismic Stability Analysis of Embankment Slopes Subjected to Water Level Changes Using Gradient Boosting Algorithms , 2021, Frontiers in Earth Science.

[9]  Jun Peng,et al.  Experimental investigation of cyclic wetting-drying effect on mechanical behavior of a medium-grained sandstone , 2021 .

[10]  Khan Muhammad,et al.  Impact of Construction Method and Ground Composition on Headrace Tunnel Stability in the Neelum–Jhelum Hydroelectric Project: A Case Study Review from Pakistan , 2021, Applied Sciences.

[11]  Faquan Wu,et al.  Advances in statistical mechanics of rock masses and its engineering applications , 2021 .

[12]  M. He,et al.  Innovation and future of mining rock mechanics , 2021 .

[13]  Luqi Wang,et al.  Triggering mechanism and possible evolution process of the ancient Qingshi landslide in the Three Gorges Reservoir , 2021, Geomatics, Natural Hazards and Risk.

[14]  Abiodun Ismail Lawal,et al.  Application of artificial intelligence to rock mechanics: An overview , 2020 .

[15]  Yue-ping Yin,et al.  Damage evolution and stability analysis of the Jianchuandong Dangerous Rock Mass in the Three Gorges Reservoir Area , 2020 .

[16]  Yue-ping Yin,et al.  A study of the treatment of a dangerous thick submerged rock mass in the three gorges reservoir area , 2020, Bulletin of Engineering Geology and the Environment.

[17]  Cuiying Zhou,et al.  Damage evolution of hydraulically coupled Jianchuandong dangerous rock mass , 2020, Landslides.

[18]  Weijian Zhou,et al.  Mechanism of accelerated dissolution of mineral crystals by cavitation erosion , 2019, Acta Geochimica.

[19]  Xiating Feng,et al.  Rock mechanics contributions to recent hydroelectric developments in China , 2019, Journal of Rock Mechanics and Geotechnical Engineering.

[20]  Xinrong Liu,et al.  Strength deterioration of a Shaly sandstone under dry–wet cycles: a case study from the Three Gorges Reservoir in China , 2018, Bulletin of Engineering Geology and the Environment.

[21]  Penghai Zhang,et al.  The analysis of rock damage process based on the microseismic monitoring and numerical simulations , 2017 .

[22]  A. Xing,et al.  Experimental and numerical investigations of a catastrophic long-runout landslide in Zhenxiong, Yunnan, southwestern China , 2017, Landslides.

[23]  Fei Ma,et al.  Reservoir-induced landslides and risk control in Three Gorges Project on Yangtze River, China , 2016 .

[24]  Francisco Gutiérrez,et al.  Anticipating and managing engineering problems in the complex karst environment , 2015, Environmental Earth Sciences.

[25]  Yue-ping Yin,et al.  Potential risk analysis on a Jianchuandong dangerous rockmass-generated impulse wave in the Three Gorges Reservoir, China , 2015, Environmental Earth Sciences.

[26]  Bo Han,et al.  A three-dimensional statistical damage constitutive model for geomaterials , 2015 .

[27]  Ying Wang,et al.  Environmental Degradation and Environmental Threats in China , 2004, Environmental monitoring and assessment.

[28]  J. Chaboche,et al.  Mechanics of Solid Materials , 1990 .

[29]  Dusan Krajcinovic,et al.  Statistical aspects of the continuous damage theory , 1982 .

[30]  Dusan Krajcinovic,et al.  The Continuous Damage Theory of Brittle Materials, Part 1: General Theory , 1981 .

[31]  Zenon Mróz,et al.  A continuum model for plastic-brittle behaviour of rock and concrete , 1979 .