摘要
柬埔寨王国额勒赛水电站碾压混凝土重力坝防渗层变态混凝土施工厚度达3 m,现场人工加浆不仅工程量大、效率低,而且很难保证其均匀性。根据现场实际并结合国内变态混凝土施工经验,对碾压混凝土大坝上、下游防渗层变态混凝土采用在拌和楼集中拌制,自卸汽车运输,小型挖机配合入仓,再用高频振动棒振捣密实的方式施工,克服了变态混凝土人工加浆不均匀的缺陷。浇筑后的混凝土表面光洁,成型较好,无明显蜂窝麻面,内部密实,层间结合好。
The thickness of distorted concrete of impervious layer of a RCC gravity dam,Lower Stung Russei Chrum Hydropower Station in Cambodia,is 3 m,which results in large labour intensity and low efficiency of grouting by workers,and the homogeneity can not be ensured. According to the practical situation,in combination of the experiences of distorted concrete construction in China,the distorted concrete of upstream and downstream imperious layer was mixed at a mixing plant,transported by dump truck,placed by small excavator and compacted and vibrated by high-frequency vibrating rod,which overcame the defect of inhomogeneous grouting. The surface of the concrete after grouting is clean and bright,the shaping is fine,no voids and pits exists,the interior is compacted and the inter-layers are well cohered.
出处
《人民长江》
北大核心
2015年第7期16-18,共3页
Yangtze River
关键词
变态混凝土
碾压混凝土坝
防渗层
额勒赛水电站
distorted concrete
RCC dam
impervious layer
Lower Stung Russei Chrum
hydropower station
