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1下穿式立交桥积水原因分析下穿式立交桥排水系统由高水系统、低水系统和下游河道系统组成,而不仅是单一的泵站系统,见图1。从工程角度分析其积水原因:一是非立交桥区流域雨水汇入,即高水客水的汇入,使得桥区泵站能力难以支撑;二是下游河道未按规划实施,或达不到应有的行洪标准,退水不畅,甚至倒灌;三是与泵站衔接的下游管道,与泵站建设年代不一致,标准不匹配;四是城市中心区排
1 Analysis of groundwater due to underpass Overpass The drainage system of the underpass overpass consists of a high-water system, a low-water system and a downstream river system, not just a single pumping station system (see Figure 1). From the engineering point of view, the reasons for its accumulation of water: First, the non-overpass drainage into the watershed, that is, the introduction of high water passenger water, making the bridge pumping station capacity is difficult to support; Second, the downstream river is not implemented as planned, or less than Some of the flood standards, poor return, or even intrusion; Third, the convergence of the downstream pipelines with the pump station, construction of pumping stations inconsistent with the age, the standard does not match; Fourth, the city center row