整体物理模型试验在人工岛排水设计中的应用

Application of physical model test in artificial island drainage design

近年来桥隧等综合交通系统工程中,人工岛的排水设计成为安全、洪涝防治的关键因素。以深中通道整体排水物理模型试验及排水设计为例,对整体物理模型试验进行优化,模拟随机越浪与实际降雨叠加的工况,应用于重力流、压力流工况下人工岛的排水设计。同时与港珠澳大桥工程进行对比,总结人工岛物理模型试验及相应排水设计要点、趋势及发展方向。结果表明,排水模型试验应采用整体和局部试验结合的方式,通过随机越浪叠加实际降雨模拟分析,显著提高模拟的准确性。

Refer to integrated transportation system projects,such as bridges and tunnels,the drainage design of artificial islands has become a key factor for safety and flood prevention.We take the integral drainage physical model test and drainage design of the Shenzhen-Zhongshan channel project as an example,optimize the integrated physical model,simulate the superposition condition of the random overtopping and actual rainfall superposition,and apply it to the drainage design of artificial island under the gravity flow and pressure flow.At the same time,comparing with the Hong Kong-Zhuhai-Macao Bridge project,we summarize the essentials,trends,and development directions of artificial islands physical model test and corresponding drainage design.The results show that the drainage physical model test should be combined with the integral and local tests,simulating conditions of the random overtopping and actual rainfall,which can significantly improve the accuracy of the test.