亚帆中心工程环抱形防波堤掩护效果及护面块体稳定性试验研究

Experimental study on shielding effectiveness and armor block stability of encircling breakwater of Yafan center project

针对工程环抱形防波堤平面布置方案,利用整体物理模型试验手段进行了验证。结果表明:1)掩护后传入港内波峰线发生了偏转和波能集中,致使码头局部泊稳条件不满足标准要求。将位轴线顺时针旋转15°,与波峰线平行优化布置后,则满足。2)根据越堤波浪是否冲击港内码头轴线标准,论证10.0、10.5、11.0 m共3个防波提高程掩护体,得出11.0 m是可行的。3)防波堤外侧质量6 t护面块体失稳,经多次优化后采用质量10 t则稳定,弧形转弯处勾连性护面块体受侧向波浪力作用比受正向波浪力偏于危险。4)将试验结果与规范公式计算值进行对比,前者均大,因此对于弧形转弯段的处理应给予关注,尽量遵循规范要求轴线夹角的相关规定。5)试验再次验证了三维港池整体物理模型试验在防波堤稳定性、越浪量和优化设计方面的必要性。

The layout plan of the encircling breakwater is verified by means of the overall physical model test.The results show that: 1) The wave peak line in the harbor basin is deflected and the wave energy is concentrated,which results in that the local mooring conditions of the wharf do not meet the standard requirements. When the position axis is rotated 15° clockwise and arranged in parallel with the wave crest line,it meets the requirements.2) According to the standard of whether the wave crossing the embankment hits the wharf axis in the harbor,three elevation shielding functions of 10. 0 m,10. 5 m and 11. 0 m are tested,and the 11. 0 m elevation is feasible.3) The 6 t armor block outside of breakwater is unstable,and 10 t armor block is stable after many times of optimization.It is also found that lateral wave forces acted on the linked armor block at the arc turn is more dangerous than the positive wave force. 4) The test results are compared with the calculated values of the standard formula,and the test results are all large.Therefore,attention should be paid to the treatment of arc turn section,and the relevant provisions of the axisincluded angle required by the standard should be followed.5) The test also verifies the necessity of the physical model test of the three-dimensional harbor basin in terms of block stability,overtopping rate and optimal design.