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浙江省第二建筑工程公司施工的宁波北仑港火力发电厂一期(2×60万千瓦)一号机240m/7筒中筒烟囱基础外径33.60m,高4.50m,基础由内外筒组成,间隔为2.80m,基础支承于161根φ609×11钢管桩。整个基础混凝土共2700m~3,设计标号300#,选用425#矿渣硅酸盐水泥、大粒径石子(1～4cm)、中粗砂,在混凝土中掺水泥用量的0.25％的NO糖蜜缓凝剂,水泥用量298kg/m~3。基础于一九八八年元月一次浇＄完成,混凝土标准试块检验结果完全符合要求。施工中采用了在内筒底板中心、外筒底板开始浇灌点和合拢中心预埋白铁皮测温
Ningbo Beilungang thermal power plant constructed by Zhejiang No. 2 Construction Engineering Co., Ltd. Phase 1 (2×600,000 kilowatts) No. 1 machine 240m/7 cylinder middle chimney base diameter 33.60m, height 4.50m, foundation is composed of inner and outer cylinders, spacing It is 2.80m and the foundation is supported by 161 φ609×11 steel pipe piles. The total amount of basic concrete is 2700m~3, design number is 300#, 425# slag portland cement, large size stone (1~4cm), medium coarse sand are selected, and 0.25% of NO molasses is mixed with cement in the concrete to retard the Agent, cement dosage 298kg/m~3. Based on the completion of a one-time $100 per month in January 1988, the test results of the concrete standard test blocks fully meet the requirements. In the construction, embedded tin plate was used to measure the temperature at the center of the bottom plate of the inner cylinder, the starting point of the bottom of the bottom plate of the outer cylinder, and the closed center.