Abstract: Relying on a high fill channel engineering project, with the help of finite element analysis software, the distribution characteristics and control factors of the internal force of the lining faceplate under the influence of post-construction settlement of the channel were studied. In addition, the influence law of the seam on the distribution characteristics of the faceplate internal force was explored. The results show that the internal force distribution of the faceplate during post-construction settlement is controlled alternately by the uneven deflection of the faceplate and the friction between the slope and the faceplate. The faceplate near the bottom of the slope is the main compression area, and its internal force is mainly controlled by the friction force of the slope on the faceplate. However, the faceplate near the top of the slope is the main tension area, and its internal force is mainly controlled by the uneven deflection of the faceplate; the seam treatment in the tensile area of the faceplate will increase the tensile stress level of the faceplate, which is unfavorable to the stress state of the faceplate. If the seam treatment is performed in the faceplate compression area, the internal force distribution of the faceplate caused by post-construction settlement will be changed, and the range of the faceplate compression area will be increased. On the one hand, it gives full play to the advantages of strong compressive performance of concrete faceplates, and on the other hand effectively reduces the risk of faceplate cracking under tension.

Key words: faceplate, internal force distribution, compression area, tensile area, post-construction settlement, seam, ANSYS