Abstract
How to control deformation and avoid resonance is the key to ensuring the safety of the super-long pipeline when it is floating in the sea. Based on the deformation warning value of pipeline prototype composite material obtained from laboratory tests, the raw water pipeline project in Tong’an Xiamen adopts wireless communication equipment to transmit data, supplemented by aerial photography technology to monitor and feedback the strain and vibration during the dynamic construction of long-distance pipeline floating transportation. Combined with dynamic construction, this monitoring method avoids excessive deformation and resonance of the steel pipeline during floating transportation, and prevents the destruction of the anticorrosive coating. The airtightness test after completion shows that the whole pipeline meets the acceptance requirements. The monitoring results show that the strain at the bent position of the pipeline is large in the process of floating transportation, and the jacking speed and position of the tugboats have an important influence on the deformation of the pipeline. The same type of project should focus on these aspects and timely feedback monitoring data. At the same time, the study also provides detailed strain, modal analysis and effective monitoring technology for the safety of offshore steel pipeline floating transportation.
Highlights
The construction of the trans-sea pipeline is an important part of the municipal pipeline project
An energy-efficient cooperative scheme for wireless sensor network (WSN) nodes used in long-distance water pipeline monitoring systems was proposed by Seddiq et al [24]
The monitoring personnel immediately gave warning to the construction institution and reports the position of the maximum strain, informing the construction site operators to send an additional tugboat near Section146 onfe1a9r the midpoint of the inclined pipeline section and continuously adjusting the position of the additional tugboat according to the monitoring data
Summary
The construction of the trans-sea pipeline is an important part of the municipal pipeline project. The monitoring methods of offshore pipelines mainly include fiber Bragg grating, acoustic emission and wireless sensor testing. An energy-efficient cooperative scheme for wireless sensor network (WSN) nodes used in long-distance water pipeline monitoring systems was proposed by Seddiq et al [24]. Determination of deformation warning value of steel pipeline and 3PE composite material, monitoring instrument accuracy, waterproofing and long-distance signal attenuation, the monitoring scheme and the dynamic construction method which can effectively reduce the deformation and resonance of the pipeline, these are problems urgent to solve and design. Based on the project in Tongan Xiamen, this paper attempted to carry out on-site monitoring and real-time feedback of long-distance offshore steel pipeline floating transportation, and studies the monitoring scheme, dynamic construction method and deformation characteristics of offshore pipe floating transportation. As soon as the monitoring strain approaches or reaches this value, the monitoring tester should immedi6aotef l1y8 send out early warning signals and location information to the operators on the construction site
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