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在桥梁工程中进行基础施工时,施工难度就在于水的控制,如果桥涵基坑的积水过多将严重影响基坑的施工安全和工程进度。因此,在桥涵基坑,尤其是含水丰富地区的桥涵基坑施工中必须采取合理有效的方法排出基坑内及周围土体中多余的水。就目前来看,有钢板桩围堰、钢套箱围堰等方法,但这些施工方法的工艺复杂,且成本也高。如果在河流水流量不大,且又选择在枯水季节施工的话,而相对于上述方法而言,井点降水施工法成本较低、工艺简单,且容易进行施工操作。
Construction of bridges in the basic construction, the construction difficulty lies in the control of water, if the bridge and culvert pit water will seriously affect the construction of the pit safety and progress of the project. Therefore, in the construction of bridge-culvert foundation pit, especially in the bridge-culvert foundation pit with rich water area, it is necessary to take a reasonable and effective method to discharge excess water from the soil in and around the foundation pit. For now, there are steel sheet cofferdam, steel box cofferdam and other methods, but these methods of construction process complexity, and the cost is high. If the river water flow is not large, and then choose to dry season construction, then relative to the above method, the well point method of lowering the cost of construction methods, simple process, and easy to carry out construction operations.