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水库蓄水后,为满足防洪和发电的要求,库水位将在一个较大的范围内反复升降变化,很可能使稳定的库岸边坡向不稳定方向发展,因此,有必要对库岸边坡的水-岩作用机理进行系统的研究。分析可知,库岸边坡水-岩作用机理应根据水位变化情况分阶段考虑,同时应该重点考虑浸泡-风干的循环作用。在分析库水位升、降变化对库岸边坡稳定性影响时,本文提出了对库岸边坡分段的分析方法,从力学机理上较好的解释了库岸边坡在水位上升或下降过程中安全系数先减小后增大的原因,也能很好的解释一些库岸边坡失稳的原因。最后将库岸边坡水-岩作用机理概括为五个方面:力学弱化机制、局部应力集中机制、物理弱化机制、化学弱化机制、浸泡-风干循环作用累积损伤机制,这样可以更全面的分析库岸边坡的水-岩作用机理和作用效应。研究成果为库岸边坡的变形稳定分析提供了有益的依据。
After the reservoir is filled with water, in order to meet the requirements of flood control and power generation, the water level of the reservoir will fluctuate repeatedly within a relatively large range, which is likely to make the stable bank slope develop in an unstable direction. Therefore, Slope of the water-rock mechanism of systematic research. The analysis shows that the water-rock interaction mechanism of bank slope should be considered in stages according to the water level changes, and the soaking-drying cycle should be considered emphatically. In analyzing the influence of reservoir water level rise and fall on the stability of reservoir bank slope, this paper presents a method of analyzing the slope of reservoir bank slope, which is better explained mechanics mechanism of reservoir bank slope rising or falling The reason why the safety factor first decreases and then increases in the process can also well explain the reasons for the instability of some bank banks. Finally, the mechanism of water-rock interaction is summarized as follows: mechanical weakening mechanism, local stress concentration mechanism, physical weakening mechanism, chemical weakening mechanism and soaking-drying cycle cumulative damage mechanism, so as to make a more comprehensive analysis of the reservoir Water - rock mechanism and effect of bank slope. The research results provide a useful basis for the stability analysis of bank slope deformation.