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溪洛渡大坝上游集水坑平面尺寸约500 m2,淤泥淤积深度达6 m,基岩渗水量大,淤泥清理和水的引排是集水坑回填施工的重点和难点。施工中通过合理组织排水,在淤泥中加填充材料,提高淤泥承载能力,满足设备出渣要求,提高了清淤效率,为在2010年汛前回填混凝土争取了时间。通过采取排水盲管、排水盲沟、集水盲坑、排水管、集水箱及集水管的综合使用等措施,使集水坑中的基岩渗水得到合理引排,集水坑混凝土得以顺利回填。
The size of the catchment above the Xiluodu Dam is about 500 m2. The siltation depth reaches 6 m. The seepage volume of the bedrock is large. Silt cleaning and water drainage are the key and difficult points in the construction of the sump. In the process of construction, reasonable drainage was organized, filling material was added to the silt, the carrying capacity of the silt was improved, the slag discharging requirements of the equipment were satisfied, the dredging efficiency was raised, and the time was required for the backfill of concrete before the flood season in 2010. By taking measures such as draining blind pipe, blind draining ditch, blind collecting pit, drainage pipe, water collecting tank and water collecting pipe, etc., the seepage of bedrock in the water collecting pit is properly induced, and the concrete of the water collecting puddle is successfully backfilled .