混凝土坝坝体渗漏危害性分析及其处理

Analysis of Leakage Harmful to concrete dams and its treatment

混凝土坝坝体产生渗漏 ,主要原因是混凝土和横缝止水系统质量差。坝体严重渗漏 ,将降低大坝的安全度和耐久性 ,加剧坝体冻胀和冻融破坏 ,还有可能直接危及到大坝和水电厂发电设备的安全运行。由于坝体渗漏水为有压渗流 ,仅从廊道或下游坝面堵塞渗漏逸出点 ,往往达不到防渗止漏处理目的 ,应设法从源头封堵住渗漏水的入渗点 ,增强坝体和横缝的防渗能力 ,同时适当辅以引排措施。

The dambody leakage of concrete dams mainly result from the poor sealing of concrete and transverse joints.Serious dambody leakage will reduce the safety and the durability,worsen the dambody frost heave and freezing\|thawing,likely jeopardize the safe operation of dam and facilities.Generally,it cannot attein the goal of leakage treatment if only plugging the leakage exit point along the gallery and downstream face since dambody leakage is pressure seepage.It shall be attempted to stop up the leakage source and increase the seepage prevention of dambody and transverse joints,at the same time take adequately diversion and drainage measures.