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基于流体渗流原理,利用弹性力学理论,对以水压力为主要驱动力的孔隙初期渗水进行了力学计算分析,把孔隙形状假定为圆柱形孔隙,考虑渗水对孔隙内部空气压缩的影响,推导出了渗水深度计算公式。依据此理论计算方法,对影响渗透深度的孔隙半径、长度、渗水时间、温度、外界压力等参数进行了敏感性分析。结果表明,渗水深度随水压力的增大逐渐趋于稳定,当水压超过混凝土抗渗规范规定的1.2MPa后,渗水深度变化不明显,基本可以忽略;水的温度对渗水深度影响不明显,这与规范基本吻合。孔隙半径决定渗水速率,孔隙长度决定总的渗水深度;随着渗水时间的推移,渗水深度逐渐增大,并最终趋于稳定,且孔径越小,达到稳定所需要的时间越长。
Based on the principle of fluid seepage, using elastic mechanics theory, the initial seepage of pores with water pressure as the main driving force was calculated. The pore shape was assumed to be a cylindrical pore. Considering the effect of water seepage on the air compression in the pores, Seepage depth calculation formula. Based on this theoretical calculation method, the sensitivity analysis of parameters such as pore radius, length, water seepage time, temperature, external pressure and so on, which affect the penetration depth, was carried out. The results show that the seepage depth gradually becomes stable with the increase of water pressure. When the water pressure exceeds 1.2 MPa specified in the impervious specification of concrete, the seepage depth does not change obviously and can be neglected basically. The influence of water temperature on water seepage depth is insignificant, This is consistent with the norms. The pore radius determines the water seepage rate, and the pore length determines the total water seepage depth. As the seepage time increases, the water seepage depth gradually increases and eventually tends to be stable. The smaller the pore diameter, the longer it takes to reach stability.