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向家坝水电站二期工程包括右岸非溢流坝段、泄洪坝段、厂房坝段、坝后厂房、升船机等建筑物,混凝土工程量达940万m~3,高峰月浇筑强度38.67万m~3,具有工程量大、工期紧、施工强度高等特点。其中二期大坝采用3台塔带机和3台平移式缆机为主要浇筑手段,辅以部分门塔机补充浇筑,塔带机与缆机穿插作业,空间干扰大,施工设备布置复杂。受度汛及蓄水节点限制,大坝一线混凝土施工强度持续高峰超过10个月,施工难度较大。结合向家坝二期工程的特点,对混凝土工程施工的重难点进行了优化研究,提出了二期混凝土工程的施工组织设计框架。
Xiangjiaba Hydropower Station Phase II project includes non-overflow dam right bank section, flood dam section, plant dam section, dam plant, ship lift and other buildings, concrete construction volume of 9.4 million m ~ 3, the peak monthly pouring strength of 386,700 m ~ 3, with a large amount of construction, tight schedule, high construction intensity. Among them, the second-stage dam adopts three tower machines and three translating cable machines as the main pouring facilities, supplemented by some portal tower machines, and the tower crane and cable machine are interspersed with large space interferences and the construction equipment layout is complicated. Affected by flood season and water storage nodes, the intensity of first-line dam concrete construction peaked continuously for more than 10 months, and the construction was difficult. Combined with the characteristics of the second phase project of Xiangjiaba, the heavy and difficult points of concrete construction are optimized and the construction design framework of the second-phase concrete project is put forward.