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对于地形或排水设施特殊的情况,如滨海地区、地下水位特别高的地区,重力自流排水十分困难,如果采用真空(负压)排水,则不但可以节省基建费(少开挖,管道铺设深度浅,一般埋深只有1～1.5m),而且可以节省运行费(污水抽升费用可能高于抽真空费用)和减少管理维护上的麻烦,此外它还避免了污染地下水和土壤的危险(因为管道是负压排水).真空排水系统主要由三部分组成:集水井、管道和真空站.集水井是每个排水点排水进入点,而真空站为排水最后集中地,是整个系统的核心.一般它从高程上说应当设在排水范围最低点.另外,为了尽量
For special conditions of terrain or drainage facilities, such as coastal areas and areas with particularly high groundwater levels, gravity drainage is very difficult. If vacuum (negative pressure) drainage is used, not only can construction costs be saved (less excavation, shallow pipe laying depth). The general depth is only 1 ~ 1.5m), and it can save operating costs (sewage pumping costs may be higher than the vacuum pumping costs) and reduce management and maintenance troubles, in addition it also avoids the danger of contaminating groundwater and soil (because the pipeline The vacuum drainage system is mainly composed of three parts: the water collection well, the pipeline and the vacuum station. The collection well is the drainage entry point for each drainage point, and the vacuum station is the final concentration point for the drainage and is the core of the entire system. It said from the elevation that it should be located at the lowest point of the drainage area. In addition, in order to try