To effectively solve the leakage problem of landfill leachate, it is necessary to establish a vertical cut-off wall around the landfill site for seepage control. To accurately analyze the deformation of the cut-off wall, a 1/8-scale landfill cut-off wall miniature model is designed and fabricated. The actual force of the cut-off wall is simulated by filling sand on the outer side of the model wall. Meanwhile, a nonlinear finite element model of the wall is established using the ANSYS to simulate the deformation of the seepage wall. The results show that the cut-off wall made from a polyvinyl alcohol-bentonite-fly ash-cement (PBFC) anti-seepage slurry has a high ultimate bearing capacity, and its ultimate strain is approximately 5%, which is much higher than the limit strain of the actual force conditions of the cut-off wall. The horizontal displacement of the cut-off wall is approximately linear and decreases gradually from the top to the bottom, and no reverse displacement is observed. The main stress of the wall is smaller than that of the slurry, and there is no tensile stress. The simulated results are similar to the measured values of the cut-off wall, which indicates the accuracy of the simulation analysis.

为了有效地解决垃圾渗滤液渗漏问题，有必要在垃圾填埋场周围建立垂直的防渗墙，以进行渗漏控制。为了准确地分析防渗墙的变形，设计并制作了一个1/8比例的垃圾填埋防渗墙微型模型。防渗墙的实际力是通过在模型墙的外侧填充沙子来模拟的。同时，利用ANSYS软件建立了墙体的非线性有限元模型，以模拟渗流墙的变形。结果表明，由聚乙烯醇-膨润土-粉煤灰水泥（PBFC）防渗浆制成的防渗墙具有很高的极限承载力，其极限应变约为5％，远高于土限制防渗墙实际受力状态的应变。防渗墙的水平位移近似为线性，并且从顶部到底部逐渐减小，并且没有观察到反向位移。壁的主应力小于浆料的主应力，并且没有拉伸应力。模拟结果与隔断墙的测量值相似，表明模拟分析的准确性。