Abstract: The paper analyzed the advantage conditions of Fengman dam foundation and dam body, and indicted that the present problems of Fengman dam were resulted from the issues left by its congenital birth defects. It also analyzed the varying conditions of dambody corrosion, concrete strength and the fault F67 near 70 years, and put forward the feasibility on Fengman dam repair and strengthening. It pointed out that the key issue is to solve the leakage occurred in the section A of the upstream face. To stop the leakage will eliminate the disadvantage effects on concrete durability and hidden issues on flood release. Reference as the operation practice near 70 years, it’s no problem for Fengman dam in the foreseeable future that it safely operate another 70 years after anti-seepage strengthening measures taken, the same as the synthetic treatment measures taken to solve the other problems.

摘要： 本文分析了丰满大坝坝基和坝体的有利条件，指出大坝目前存在的问题是先天性缺陷造成的历史遗留问题，同时分析了近70 年来坝体溶蚀、混凝土强度和F67 断层的变化情况，提出了丰满大坝进行维修加固的可行性。同时指出维修加固重中之重要解决的问题是上游面A 块渗漏问题，遏制渗漏可消除对混凝土耐久性的不利影响和泄洪安全隐患。按照近70 年运行实践，可以预见防渗加固的同时采取综合措施解决其它问题后，可保证丰满大坝的长期安全运行。