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我公司在曙四联的污水提升站混凝土蓄水池施工中,采用了沉井法施工,取得了较理想的效果,既保证了工程质量,加快了工程进度,又提高了经济效益。一、施工方案的确定曙四联合站地处辽河河套地区,芦苇塘经常积水深500mm 左右,且地下水位高(相当于自然地坪),地质差,地表3m 以内为亚粘土,3m 以下为粉砂性亚粘土。在这样的条件下建造φ6.4m,深5.5m 的钢筋混凝土蓄水池,困难很大。若采用井点降水法施工,根据以往的经验止水效果不佳,施工费用较高;若采用大开挖方法施工,塌方很难处理,大面积排水也有困难,同时又受周围
Our company adopted the open caisson construction method in the construction of the concrete storage tank of the sewage lifting station in the Sui-Silian Chemicals Co., Ltd., and achieved satisfactory results. It not only ensured the project quality, accelerated the project progress, but also improved the economic benefits. First, the construction program to determine the joint station of the fourth station is located in the Liaohe Hetao area, reed pond is often about 500mm deep, and the groundwater level is high (equivalent to the natural floor), poor geology, within the surface 3m sub-clay, below 3m Silty clay. Under such conditions, it is very difficult to build a reinforced concrete reservoir with φ6.4m in depth and 5.5m in depth. If the well-point precipitation method is used, according to past experience, the effect of water stoppage is not good and the construction cost is high; if large excavation method is used, it is difficult to deal with landslides, and large-area drainage is also difficult, and at the same time it is surrounded by