土福湾赤岭岸线沙滩修复技术探讨

Discussion on restoration technology of Chiling Beach in Tufu Bay

针对拦沙结构物优化问题,以土福湾赤岭岸线修复工程为例,分析了缩短拦沙堤长度而不影响航道的可行性。岸滩采用滩肩补沙方式,缩短拦沙堤长度至150 m,允许沙子绕过拦沙堤进入备用蓄沙池。实地检验近2年,期间遭受多场台风侵袭,尤其是2020年下半年台风组团影响,方案经受住了考验,证明设计效果良好。旁通输沙方案也节省了投资。研究表明,适当缩短拦沙构筑物也有可能达到预期成果,为类似沙滩养护工程带来新的启示。

Taking the restoration project of Chiling Beach in Tufu Bay as an example, this paper analyzes the feasibility of shortening sand barrier length without affecting navigation conditions for optimizing the sand barrier structure. The plan adopts the beach berm nourishment technology and shortens the sand barrier length to 150 m, with sand allowed to enter the standby sand storage tank by bypassing the structure. During the field inspection in the past two years, the structure was attacked by many typhoons, especially in the second half of 2020. The plan withstood the test, which proves that the design effect is good. In addition, the sand bypassing solution also saves investment costs. This study shows that properly shortening the sand barrier structure may also achieve the expected results, bringing new inspiration for similar beach nourishment projects.