土坝铺盖裂缝的渗透稳定性是一有待研究的问题,深为工程设计和管理人员关注。本文通过渗流计算探讨了坝外和坝内铺盖出现裂缝后所形成渗流场的特点,还用两个冲蚀试验装置探讨了断裂面土体冲蚀和缝中淤填的特性。据此,强调了在设计和施工中在铺盖上下采用砂层保护的必要性,并提出了采用在深水下灌入细砂的方法对铺盖裂缝试行处理的建议。 The seepage stability of earthwork dam cover cracks is a subject to be studied and deeply concerned by engineering design and management personnel. In this paper, the seepage field is analyzed by seepage calculation, and the seepage field formed after cracks appear in the dam and dam lining are discussed. Two erosion test devices are also used to investigate the characteristics of soil erosion and the siltation in the fracture. In view of this, the necessity of sand protection in the upper and lower layers of the bedding was emphasized in the design and construction, and the proposal of pilot treatment of bedding cracks was put forward with the method of injecting sand in deep water.