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故县大坝在 11#～ 16 #坝段溢流面反弧段底部附近产生了总长 70多 m的纵向非连续贯穿性裂缝 ,对溢流坝挑流鼻坎的稳定运行构成威胁。通过超声波探测法探测了裂缝的深度及走向 ,初步探讨了裂缝成因 ,用有限元法对鼻坎各种工况下的应力进行了分析 ,表明在泄洪状态下 ,鼻坎裂缝将继续发展 ,因此必须加固处理。采用广州化学研究所研制的液态 EAA环氧材料对裂缝进行了灌浆处理 ,并辅以穿缝钢筋锚固 ,从而初步保证了溢流面的泄洪安全
The dam of Guoxian County produced a longitudinal discontinuous crack of more than 70 m in length near the bottom of the anti-arc section of the overflow surface of 11 # ~ 16 # dam, which posed a threat to the stable operation of the run-off nose of the overflow dam. The depth and direction of the fracture were probed by ultrasonic probe method. The cause of the fracture was probed. The stress of the ridge under various working conditions was analyzed by finite element method. The result shows that the crack in the nose ridge will continue to develop under the condition of flood discharge. Must be reinforced. The liquid EAA epoxy material developed by Guangzhou Institute of Chemistry was used to grout the cracks and reinforce the anchorage through the seams so as to preliminarily ensure the safety of flood discharge on the overflow surface