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上海柴油机厂为了完善厂区的排水系统,设计了一项管径为φ800～φ2000,埋置深度在1.8～2.4米,全长790米的下水道改造工程。该工程设有泵房一座,其中长宽高为11.6米×11.2米×8.4米,设计要求采用沉井工艺施工. 施工之前,勘探表明该泵房位置自地表到地下约5米处有许多坚硬块物和钢包渣等杂物,于沉井施工不利。我们曾经考虑移址建造,但在许可选址的范围内,地质情况都是如此.至此,只得在具体施工方法上寻找出路了。一、施工方案的选择第一种方案:按照设计要求和沉井常规施工方法,在基坑挖深0.5～1米后,泵房沉
In order to improve the drainage system of the plant, the Shanghai Diesel Engine Factory designed a sewer renovation project with a diameter of φ800-φ2000, a buried depth of 1.8-2.4 m, and a total length of 790 m. The project has a pump room with a length, width and height of 11.6 meters by 11.2 meters by 8.4 meters. The design requires the use of open caisson technology. Before the construction, exploration showed that the location of the pumping station is about 5 meters from the surface to the ground. There are many hard The debris and ladle slag, etc., are unfavorable for sunk well construction. We have considered relocating the site, but within the scope of the permitted site, the geological conditions are the same. Thus, we must find a way out for the specific construction method. First, the choice of construction program The first program: In accordance with the design requirements and the general method of caisson construction, in the pit dig depth 0.5 to 1 meters, the pump room Shen