污水处理站封闭池体构筑物夏季施工技术

SUMMER CONSTRUCTION TECHNOLOGY OF CLOSED POOL STRUCTURES IN SEWAGE TREATMENT STATIONS

电子厂房配套污水处理站-1层与2层设置大量污废水处理池,包括共计132个水池。通过降低水泥用量,增加粉煤灰或矿粉比例,降低混凝土水化热;通过增加缓凝剂用量,控制初凝时间大于3 h。水平施工缝位于地下室顶板,顶板设置出料口,水平施工缝止水钢板焊接连接;竖向施工缝位于水池底部导墙及后浇带处,竖向施工缝采用橡胶止水带冷粘法连接。对于池体狭小投影面积小于2 m2的反应池,无模板安装操作空间,采用狭小空间水池定制整体模板技术和大模板整体安装技术,降低模板施工难度。水池内空间密闭,温度高,操作人员无法在池内长时间作业,在水池内通风口配置鼓风机,拆除墙模板,在池体内布置PVC管和自动喷淋养护装置,减少工人在高温的水池内作业时间。

A large number of sewage treatment tanks are set up on the 1F and 2F of the electronic workshop supporting sewage treatment station, including a total of 132 large and small pools. By reducing the amount of cement and increasing the proportion of fly ash or mineral powder, the hydration heat of concrete is reduced;by increasing the amount of retarder, the initial setting time is controlled to be greater than 3 hours. The horizontal construction joint is located on the roof of the basement, and the top plate is provided with a discharge port, and the horizontal construction joint is welded with water-stop steel plates;the vertical construction joint is located at the guide wall at the bottom of the pool and the post-pouring belt, and the vertical construction joint is connected by cold-bonding rubber water-stop. For the reaction tank with a narrow projected area of less than 2 square meters,there is no space for template installation and operation, and the overall template technology for small space pool customization and the overall installation technology for large templates are used to reduce the difficulty of template construction. The space in the pool is airtight and the temperature is high, so operators cannot work in the pool for a long time. Blowers are installed at the vents in the pool, the wall formwork is removed, and PVC pipes and automatic spraying and curing devices are arranged in the pool to reduce workers working in high-temperature pools time.