Research on Stability Analysis and Numerical Simulation of Boulders in Slope along Urban Reservoir Banks
The stability of isolated boulders on urban reservoir bank slopes is crucial to urban safety construction and the enhancement of disaster prevention and mitigation capabilities.Taking the giant isolated boulder cultural relics located on the bank of the Jialing River within the scope of the Two Rivers and Four Banks Project as a case study,this paper investigates the impact of natural environments and engineering activities on the stability of isolated boulders using a combination of qualitative analysis and numerical simulation.Firstly,a qualitative analysis is conducted on the internal and external factors affecting the stability of the isolated boulders,including their topographical and geomorphological features,morphological characteristics,structural properties,rock and soil erosion,and engineering activities.This analysis provides a preliminary evaluation of the basic stability state of the isolated boulders.Subsequently,a finite element numerical simulation method is employed for calculations.A three-dimensional model of the isolated boulders is obtained through three-dimensional high-precision laser scanning,and an isolated boulder-slope model is established to simulate their deformation under various unique conditions of reservoir bank slopes,including gravity,water flow,and periodic loads.The simulation results indicate that the maximum displacement of the isolated boulders under various conditions and their combined effects is relatively small,and no overturning phenomenon occurs.Based on the comprehensive qualitative analysis and numerical simulation results,an overall assessment of the stable state of the isolated boulders is made.
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