【摘要】 为研究电化学对泥岩弱层的改性效果，针对含顺倾弱层边坡研发电化学改性加固方案。综合采用理论分析、试验研究与数值模拟等方法，分析了电化学技术对泥岩的改性机理、含顺倾弱层边坡滑移模型与破坏机制，建立了电化学加固泥岩弱层力学平衡方程，设计了分段改性加固方案并模拟分析边坡应力、位移和稳定性。结果表明：电化学改性之后的泥岩抗剪强度有明显提升，相较于15%含水率的原状泥岩，其黏聚力提高了近2倍，内摩擦角提高了2.8°;较25%含水率的原状泥岩，黏聚力提高了4.3倍，内摩擦角提高了11.8°。加固段长度由100 m增加到200 m时，边坡表面监测点的最大位移值迅速下降，减少了12 cm。边坡稳定系数增加到1.18,剪应变大于0.001的区段长度缩短了92.2 m。边坡表面最大位移值随加固段长度增大呈指数规律下降，稳定系数随加固段长度增大呈先加速增长后减速增长的变化规律，剪应变区段长度随加固段增长呈阶梯式下降规律，分析确定泥岩弱层经济合理且满足设计规范要求的加固段长度为220 m。更多还原

【Abstract】 Aiming at investigating the modification effects of electrochemistry on weak mudstone layers, this study developed an electrochemical modification and reinforcement scheme for slopes containing dip-weak layers. By integrating theoretical analysis, experimental research, and numerical simulation, the modification mechanism of electrochemical technology on mudstone, as well as the sliding model and failure mechanism of slopes with dip-weak layers, was introduced first. Furthermore, a mechanical equilibrium equation for electrochemically reinforced weak mudstone layers was established, and a segmented modification and reinforcement scheme was designed. Finally, the stress, displacement, and stability of the slope after the application of the modification and reinforcement scheme were simulated and discussed. The following results were obtained: After electrochemical reinforcement, the shear strength of mudstone is significantly improved. To be specific, the cohesion and internal friction angle of the modified mudstone grow by nearly 2 times and 2.8° respectively compared to original mudstone with a 15% water content, and they grow by 4.3 times and 11.8° respectively compared to original mudstone with a water content of 25%. As the reinforcement length increases from 100 m to 200 m, the maximum displacement at the monitoring points on the slope surface drops rapidly by 12 cm; the slope stability factor rises to 1.18; and the length of the section with a shear strain of greater than 0.001 is shortened by 92.2 m. With the increase in reinforcement length, the maximum displacement on the slope surface falls exponentially; the slope stability factor surges at an accelerating rate initially and grows at a decelerating rate later; and the length of the section with a marked shear strain goes down stepwise. The analysis discloses that the economically reasonable and design-compliant reinforcement length for the weak mudstone layer is determined to be 220 m.更多还原