苏通长江公路大桥河段通航水流条件数值模拟

Numerical simulation of rivers condition on navigation in Sutong Highway Bridge reach of Changjiang

为模拟苏通长江大桥河段水流条件,采用二维浅水方程,建立了水流数学模型,并根据实测资料进行了潮位、流速流向过程、流速分布的验证计算,能够较准确复演天然河道的水流条件,在此基础上开展了苏通长江大桥建桥前后通航水流条件计算,计算结果表明,采用东线桥位双塔斜拉桥对通航水流条件影响最小。

Mathematical models is built for simulating rivers condition of Sulong Changjiang highway Bridge reach, it base on two-dimension shallow water equation. Verify calculation is performed about tide level, velocity and transverse distrib-utes of velocity. Contrast with the observed data, the result shows that this model can accurately simulate rivers condition. Then, simulation computation are performed on the rivers condition before and after building Sutong Changjiang Highway Bridge, the result shows that the influence on rivers condition of the double pylon Cable-stayed Bridges in eastern route is the smallest.