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1 工程概况φ2000mm排海管道工程是嘉兴市污水处理工程的一个重要组成部分。正常排放管总长2050m,管道内径φ2000mm,从高位井向大堤外顶进,出洞口管内底标高-20.23m,前1747.5m为下坡顶进,坡度-2.5‰,最后302.5m为平坡顶进,终点管内底标高-24.60m。采用F-B型钢承口式钢筋混凝土管,楔形橡胶圈接口,多层胶合板衬垫。在平坡段内设有16根内径φ380mm的扩散上升管,用垂直顶升工法施工。工程的地质情况:第④层为砂质粉土夹粉砂(灰色,饱和,稍密至中密,中等压缩性土,强度较高。顶板高程-13.70～-11.10m,层厚4.90～6.60m);第④a层为粉质粘土(饱和,流塑,局部分布,中等偏高压缩性土,强度一般,顶
1 Project Overview φ2000mm Pai Hai pipeline project is an important part of Jiaxing sewage treatment project. The normal discharge pipe has a total length of 2050m and a pipe inner diameter of φ2000mm. From the high shaft to the embankment, the inner elevation of the inner hole of the tunnel is -20.23m. The first 1747.5m is the descending slope, the slope is -2.5 ‰, and the last 302.5m is the flat slope. , The end of the tube in the end elevation -24.60m. Using F-B steel socket reinforced concrete pipe, wedge rubber ring interface, multi-layer plywood liner. In the flat section with 16 diameter φ380mm diffusion riser, with vertical jacking construction method. Geological conditions of the project: The fourth layer is sandy silt sand silt (gray, saturated, slightly to medium density, medium compressibility, high strength. Roof elevation -13.70 ~ -11.10m, thickness 4.90 ~ 6.60 m); ④ ④ a layer of silty clay (saturated, flow plastic, local distribution, medium high compressibility of soil, the intensity of the general, the top