Comprehensive Experimental Research On Waves In Starting-stage Project Of Huanghua Port

The test area of wave physical model is becoming larger as port size becomes bigger. Practical problems are usually difficult to be solved by using one single plane physical model of waves, because of the limitation of experimental conditions and the accuracy requirement. Thus, various kinds of methods are necessary for the research target.This paper was based on the study for the starting-stage project of Huanghua Port, in which the breakwater is more than 13km long with some part of it being submerged. Several different methods are used for the prediction of wave parameters, including a large-scale distorted physical model, a large scale undistorted plane physical model for the important part of the test area, a flume physical model and a wave numerical model. The numerical wave model is used to supply incident wave parameters for the other models. The large-scale undistorted physical model and flume model are used to supply parameter validations for large-scale distorted physical model and the numerical model.The results of research are summarized as follows: (1)Only under the waves of 2yrs return period in the ENE direction, wave height being larger than 1.2m is observed near the wharf at the design high water level. (2) Only under the waves of 15yrs and 10yrs in the direction of ENE, overtoping with 0.76m and 0.71m height could be seen on the wharf at design high water level. (3) Under ENE direction wave condition, optimized scheme 2 is recommended for the relatively small wave height over the wharf, comparing with others. (4) Value +5.0m is recommended for the top elevation of the breakwater, while values of +5.0m at the root and -1.0m at the head are recommended for the top elevation of sand resistant dyke. (5)It is found that wave height and wave period of the secondary wave on the rear side of the breakwater increases with water depth on the top of breakwater, so does the dissipation of the secondary wave and waves are mainly observed within 4 times the wave length L behind breakwater. (6) When the wave incidence angle is less than 10°, no significant difference is observed between normal incident and oblique incident waves; When the incident angle is larger than 20°, the secondary wave height decreases when the angle increases; The ratio of the secondary wave height of angle 50°to the normally incident wave is around 0.4~0.5.The purpose of research is satisfied by using several different methods and the results have been adopted in the engineering design.