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为了研究水位升降期间炭质泥岩路堤稳定性,在探讨路堤稳定性影响因素的基础上,结合渗流及稳定性分析基本理论,提出了一种能同时考虑坡前水位压力、孔隙水压力、孔隙水重力、渗透力、软化、非饱和强度的路堤稳定性分析方法,并基于该方法对水位升降过程中炭质泥岩路堤渗流特性及稳定性进行了计算。研究结果表明:提出的路堤稳定性评价方法具有较强的适用性和针对性,能够综合评价多因素影响下炭质泥岩路堤稳定性;水位上升期及高水位恒定期,路堤内部地下水位、孔隙水压力、饱和度均逐渐升高,孔隙水压力升高幅度与高程成反比,饱和度升高幅度与高程成正比,水平向内、竖直向下的渗透力及其峰值、水平向内的位移均先增大,后减小,竖直向上的位移不断增大;水位下降期及低水位恒定期,路堤内部地下水位、孔隙水压力、饱和度均逐渐降低,孔隙水压力降低幅度与高程成反比,饱和度降低幅度与高程成正比,水平向外的渗透力及其峰值、水平向外与竖直向下的位移、塑性应变区面积均先增大、后减小,竖直向下的渗透力呈“”形分布。研究成果对库、河岸地区炭质泥岩路堤的修筑及稳定性的控制具有一定的参考意义。
In order to study the stability of carbonaceous mud embankment during the rising and falling of water level, based on the discussion of the factors affecting the stability of embankment and combining with the basic theory of seepage and stability analysis, a new method is proposed to consider the water pressure, pore water pressure, pore water Gravity, infiltration, softening and unsaturated strength embankment stability analysis method, and based on the method of water level rise and fall of carbonized mudstone embankment seepage flow characteristics and stability are calculated. The results show that the proposed embankment stability assessment method has strong applicability and pertinence, and can comprehensively evaluate the stability of carbonaceous mudstone embankment under the influence of multi-factors; the water level rising period and the high water level constant period, the embankment internal water table, Water pressure and saturation are gradually increased, the pore water pressure increase rate is inversely proportional to the height, the degree of increase of the saturation is proportional to the elevation, horizontal inward, vertical downward penetration and its peak, horizontal inward The displacements increase first and then decrease and the vertical displacements increase continuously. During the descending stage of water level and constant water level, the groundwater level, pore water pressure and saturation in the embankment decrease gradually, and the decrease of pore water pressure and elevation In inverse proportion, the degree of decrease of saturation is proportional to elevation, the horizontal outward penetration and its peak, horizontal outward and vertical downward displacement, the area of plastic strain zone first increase, then decrease and then decrease vertically Permeability was “” shaped distribution. The research results have certain reference meaning for the construction of reservoir and stability of carbonaceous mudstone embankment in banks and banks.