Abstract: By analysis on the monitoring data of face－slab stress and strain, huge compressive stress was found on the face-slab, and the compressive stress at the joints was 8～15 MPa.In the process of storage water level rising, face－slab damage happened which exerted bad influence on the safety and profit of the project.Although rehabilitation, high compressive stress didn’t disappear which called for closer monitoring.Only in this way, dam safety can be guaranteed.

摘要： 通过分析三板溪主坝面板应变应力监测资料，发现一、二期面板压应力很大，分期浇筑接缝处承受8～15 MPa 的压应力，在蓄水期水位快速上升过程中，面板挤压破损，需降低水位检查修补，影响工程安全和效益。面板修补后虽取得了一定效果，但面板高压应力的情况仍存在，应加强监测和现场巡查，密切关注渗漏量等的变化，保证大坝的安全运行。