大型沉箱利旧可行性技术要点及风险评估  

Technical points and risk assessment of large caisson reuse feasibility

作　　者：钱怡杰 唐洲 QIAN Yijie;TANG Zhou(CCCC Third Harbor Consultants Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]中交第三航务工程勘察设计院有限公司,上海200032

出　　处：《水运工程》2024年第9期68-72,85,共6页Port & Waterway Engineering

摘　　要：针对重力式沉箱码头升级改造、拆除重建的需求,通过调查收集海域沉箱现状、沉箱托运路径及运距、近岸临时存放场地等基础资料,开展沉箱利旧方案设计。结合工程实例的建设条件及LNG(液化天然气)码头设计标准高的自身特点,从设计、施工和经济三大技术要点中提炼6条风险因素,包括码头平面设计、沉箱检测评估、沉箱起浮或拆除风险、施工工艺、工程进度和工程投资。通过构建风险态势结构模型,用清晰的量化指标来衡量风险因素,为推荐方案2提供了重要依据,即仅将沉箱内回填料用于LNG码头。该方案风险和投资可控,施工进度快,为后续新建码头的如期开工提供稳定的工作面。According to the needs of upgrading,demolition and reconstruction of the gravity caisson wharf,the basic data such as the current status of caisson,the transportation path and distance,and the temporary storage site are collected,and the design of the caisson reuse scheme is carried out.Combined with the construction conditions of project example and the characteristics of LNG wharf with high design standards,six risk factors are extracted from the three major technical points of design,construction and economic,including wharf plane design,caisson detection and evaluation,caisson floating or removal risk,construction technology,engineering progress and engineering investment.By constructing the risk situation structure model,the risk factors are measured with clear quantitative indicators,which provides an important basis for recommending scheme 2,namely only the backfill material inside the caisson is used for the LNG wharf.The risk and investment of the scheme are controllable,and the construction progress is fast,which provides a stable working face for the subsequent construction of the new wharf on schedule.

关 键 词：大型沉箱 利旧可行性 技术要点 风险评估 

分 类 号：U65[交通运输工程—港口、海岸及近海工程]