论文部分内容阅读
1施工方案由于大坝基础混凝土体积大,混凝土浇筑必须分块分仓进行,混凝土浇筑仓位的划分一定要和原材料供应能力、拌和能力、运输能力、平仓能力、振捣能力相适应,不然,就会影响混凝土浇筑质量和进度。混凝土仓位太小影响工程进度,混凝土仓位太大有时会出现冷缝,再进行处理也将影响工程进度和质量。在施工中根据砂石料厂的生产规模、现有机械设备的生产能力以及齿槽、建基面的尺寸大小,将上、下游齿槽各分为8块,建基面分为24块,总计40块,136仓。92m的上游齿槽,左右2块各10m,其它6块各12m。由于齿槽混凝土受三面岩石的约束,齿槽每块的第一仓混凝土厚度为1．5m,其余每仓厚度为2．3m,共计80仓,其最大尺寸为12×22×2．3m。下游齿槽长92m,深9．4m,分块情况与上游齿槽相同,共计32仓。建基面长92m,宽46m,将其分为24块,即24仓,其中最大仓为16×12×1m。考虑到温度对混凝土的影响,要求各仓混凝土跳仓浇筑,相邻两仓混凝土浇筑间隔时间最少≥5d。混凝土仓位浇筑次序为先上、下游齿槽后建基面。
1 Construction Program As the dam foundation of large volume of concrete, concrete pouring must be sub-sub-warehouse, concrete pouring positions must be divided and raw material supply capacity, mixing capacity, transport capacity, closing ability, vibration ability to adapt, otherwise, It will affect the quality of concrete pouring and progress. Concrete positions are too small affect the progress of the project, the concrete position is too large and sometimes there will be cold joints, further processing will also affect the progress and quality of the project. According to the production scale of sand and gravel plant, the production capacity of existing machinery and equipment, and the size of the alveoli and the built-up surface, the alveoli of the upper and lower reaches are divided into 8 blocks and the built-up surface is divided into 24 blocks, 40, 136 warehouse. 92m upstream alveolus, about 2 2m each 10m, the other 6 each 12m. Since the cogging concrete is restrained by three sides of the rock, the concrete thickness of the first stage of each cogging groove is 1.5m, and the thickness of each of the remaining coffers is 2.3m, totally 80 bins. The maximum size is 12 x 22 x 2.3m. The lower alveolus is 92m long and 9.4m deep, with the same subdivision as the upper alveolus, for a total of 32 silos. The building surface is 92m long and 46m wide, dividing it into 24 blocks, that is, 24 silos, the largest of which is 16 × 12 × 1m. Taking into account the impact of temperature on the concrete, requiring the warehouse hopper pouring concrete storage, adjacent two positions at least pouring concrete interval ≥ 5d. Concrete placing the order of the first position, the lower alveolar built base surface.