Research On Hydrological Computation Of Bridge And Culvert On Expressway In Qinba Mountain Area

Be directed to against water damage technique on brideg and culvert of expressway in Qinba mountain area, in this article ,baseing on home and abroad investigative data, combining with engineering projects, to study hydrological computation method on brideg and culvert of expressway in Qinba mountain area, the main work and list of research outputs contain follow several aspects。(1)Base on broadly reading home and abroad literature, analyzing and evaluating the currently comuptational method of cataclysmic frequency and cataclysmic designing throughput。(2)Through the scene observation on the terrain landform and the hydyological conditions along the route of Qinba mountain area, combining with relevant data, had been analysing the river rainstorm of regional coverage regulation and river system partitioning condition of Qinba mountain area。(3)Base the system collection for previous years flood material on drawing flood morphology sectional view, applying area-sloping method with calculating historisch flood throughput, combining with the hydyological-geological feature of Qinba area to analyse manning formulas and confirm to method of every paramater, Applying p-Ⅲflood frequency as theoretic frequency curves of hydrology analysis in Qinba mountain area, adopting linear fitting to improve calculated accuracy of previous hydrological statistic method, and improve accuracy of calculation, aiming to the specific condition on wash out by flood of brideg and culvert of expressway in Qinba area to amend the preious flood recurrence interval standard, to make it satisfied with flood discharge and drainage capability, under the condition of analgia flood throughput data, we can adopt location combined method,empirical equation method,area-analogy method and rational formula method to calculate different recurrence interval flood throughput, and expositying every formula condition of application in respectively。(4)Combine with engineering projects, to calculate hydrology of brideg and culvert of expressway in Qinba mountain area as K178+350 Wu yicun river lune and K258+390 culvert。...