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A platform for research: civil engineering, architecture and urbanism
Preparation trench construction method for ultra-deep back-digging trench in submarine channel area
The invention discloses a preparation trench construction method for submarine channel area ultra-deep back ditching, which comprises the following steps: calculating the length of a reserved submarine pipeline according to an ultra-deep burying plan and bending and effective axial force borne by the submarine pipeline, designing the length and the shape of a pre-ditching pipe gallery according to the length of the reserved submarine pipeline, channel partition and submarine geological conditions, and constructing the pre-ditching pipe gallery according to the pre-ditching pipe gallery. The method comprises the following steps: performing trench preparation construction operation of the ultra-deep trench in the submarine channel area, monitoring the operation process to obtain detection data in the operation process, and judging and analyzing whether free span and fatigue stress of the submarine pipeline exceed preset values or not according to the detection data so as to determine a trench digging correction or supplementary digging scheme. In this way, it is guaranteed that the length of the submarine pipeline falling into the pipe ditch meets the requirement for ultra-large-depth rear ditching before ultra-large-depth rear ditching, and meanwhile it is guaranteed that the reserved length of the submarine pipeline can be completely immersed into the pipe gallery after ultra-large-depth rear ditching, and self-descending of a certain depth can be completed.
本发明公开了一种海底航道区域超深后挖沟的预备沟施工方法，依据超深埋设计划，和海底管道承受弯曲、有效轴向力，计算预留海底管道的长度，依据预留海底管道的长度、航道分区以及海底地质状况，设计预先挖沟管廊长度及形状，进行海底航道区域超深后挖沟的预备沟施工作业，同时对作业过程进行监控，得到作业过程中的检测数据，依检测数据判断分析海底管道自由悬跨及疲劳应力是否超出预设值，从而确定修正挖沟或补挖方案。以此保证在超大深度后挖沟前，海底管道落入管沟的长度满足超大深度后挖沟的要求，同时保证海底管道预留的长度在超大深度后挖沟后可以完全没入管廊内并能完成一定深度的自降。
Preparation trench construction method for ultra-deep back-digging trench in submarine channel area
The invention discloses a preparation trench construction method for submarine channel area ultra-deep back ditching, which comprises the following steps: calculating the length of a reserved submarine pipeline according to an ultra-deep burying plan and bending and effective axial force borne by the submarine pipeline, designing the length and the shape of a pre-ditching pipe gallery according to the length of the reserved submarine pipeline, channel partition and submarine geological conditions, and constructing the pre-ditching pipe gallery according to the pre-ditching pipe gallery. The method comprises the following steps: performing trench preparation construction operation of the ultra-deep trench in the submarine channel area, monitoring the operation process to obtain detection data in the operation process, and judging and analyzing whether free span and fatigue stress of the submarine pipeline exceed preset values or not according to the detection data so as to determine a trench digging correction or supplementary digging scheme. In this way, it is guaranteed that the length of the submarine pipeline falling into the pipe ditch meets the requirement for ultra-large-depth rear ditching before ultra-large-depth rear ditching, and meanwhile it is guaranteed that the reserved length of the submarine pipeline can be completely immersed into the pipe gallery after ultra-large-depth rear ditching, and self-descending of a certain depth can be completed.
本发明公开了一种海底航道区域超深后挖沟的预备沟施工方法，依据超深埋设计划，和海底管道承受弯曲、有效轴向力，计算预留海底管道的长度，依据预留海底管道的长度、航道分区以及海底地质状况，设计预先挖沟管廊长度及形状，进行海底航道区域超深后挖沟的预备沟施工作业，同时对作业过程进行监控，得到作业过程中的检测数据，依检测数据判断分析海底管道自由悬跨及疲劳应力是否超出预设值，从而确定修正挖沟或补挖方案。以此保证在超大深度后挖沟前，海底管道落入管沟的长度满足超大深度后挖沟的要求，同时保证海底管道预留的长度在超大深度后挖沟后可以完全没入管廊内并能完成一定深度的自降。
Preparation trench construction method for ultra-deep back-digging trench in submarine channel area
一种海底航道区域超深后挖沟的预备沟施工方法
MA XIAOLIN (author) / CHEN MING (author) / ZHENG GUOQI (author) / ZHOU BIN (author) / HE LI (author)
2024-03-01
Patent
Electronic Resource
Chinese
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