CAJ | 학술논문

港珠澳大桥人工岛局部冲刷是大桥工程设计亟待解决的关键技术问题。在现场资料分析与物理模型验证的基础上，采用正态系列模型延伸法，在潮汐宽水槽中研究了淤泥质海床上人工岛周围流态变化和局部冲刷的发展过程。研究结果表明，在洪季大潮情况下，东、西人工岛最大冲深分别为10.3 m和9.0 m，冲刷坑集中在岛桥结合部和隧道防护段及防撞墩附近；最大冲刷深度与人工岛的几何形状、流速、工程水域的沙土特性以及水深等相关，冲刷坑的平面形态则与岛型、水流夹角、涨落潮流速差以及潮流历时有密切关系。
항주오대교인공도국부충쇄시대교공정설계극대해결적관건기술문제。재현장자료분석여물리모형험증적기출상，채용정태계렬모형연신법，재조석관수조중연구료어니질해상상인공도주위류태변화화국부충쇄적발전과정。연구결과표명，재홍계대조정황하，동、서인공도최대충심분별위10.3 m화9.0 m，충쇄갱집중재도교결합부화수도방호단급방당돈부근；최대충쇄심도여인공도적궤하형상、류속、공정수역적사토특성이급수심등상관，충쇄갱적평면형태칙여도형、수류협각、창락조류속차이급조류력시유밀절관계。
Local scour of the Hong Kong-Zhuhai-Macao bridge artificial island is a key technical problem to be solved in bridge project design. . Based on the field data analysis and physical model validation, using the normal extension method of series models, we study the flow pattern variation and local scour around the artificial island. The results show that in the flood season of spring tide situation, the maximum scouring depth of the east andwest island is 10.3 m and 9.0 m respectively, and the scour concentrates in the island bridge and tunnel with protective section and near the anti-collision pier;The maximum scour depth relates to the artificial island geometry, flow velocity, sand characteristics of the engineering water area and depth of such related, and the scouring plane form relates to the island type, flow angle, speed difference of the rising and falling tide, and tidal duration as well.