近日
大港油建公司
中油管道681多功能作业船团队
成功完成了上海LNG站线扩建项目
海底输气管道工程
(以下简称“上海LNG海管项目”)
海缆交越处理施工
原计划20天的工期缩短至11天
完成了1500米长的海缆下沉作业
最大处理深度达到7.5米
刷新了国内海缆下沉深度纪录
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此次海缆交越处理是该项目海上施工第一个控制性工序,施工全过程采用海底后挖悬吹施工工艺,海缆与挖沟设备的喷冲口垂直距离控制在1.0米以上,以防止施工设备随着船舶在海面的升沉对海缆造成接触伤害。与此同时,每层海缆下沉深度控制在1.5米以内共分5层,采取逐层放坡处理,保证将海缆平缓置于沟底。

经过11天的高强度作业,最终项目团队提前9天安全圆满地完成了交越处理任务并通过了现场BV(必维船级社)工程师和监理工程师的验收。
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