| PAN Dongzi,WANG Lizhong,PAN Cunhong,HU Jinchun. 2007. Experimental investigation on the wave-induced pore pressure around shallowly embedded pipelines. Acta Oceanologica Sinica, (5):125－135 |
| Experimental investigation on the wave-induced pore pressure around shallowly embedded pipelines |
| Experimental investigation on the wave-induced pore pressure around shallowly embedded pipelines |
| Received:November 08, 2006 Revised:May 23, 2007 |
| DOI： |
| Key words:ocean engineering model test submarine pipeline pore pressure wavelet analysis |
| 中文关键词: ocean engineering model test submarine pipeline pore pressure wavelet analysis |
| 基金项目: |
| Author Name | Affiliation | E-mail | | PAN Dongzi | Zhejiang Institute of Hydraulics and Estuary, Hangzhou 310020, China
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China | | | WANG Lizhong | College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China | wlzzju@163.com | | PAN Cunhong | Zhejiang Institute of Hydraulics and Estuary, Hangzhou 310020, China | | | HU Jinchun | Zhejiang Institute of Hydraulics and Estuary, Hangzhou 310020, China | |
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| Abstract: |
| A series of regular wave experiments have been done in a large-scale wave flume to investigate the wave-induced pore pressure around the submarine shallowly embedded pipelines.The model pipelines are buried in three kinds of soils, including gravel, sand and silt with different burial depth.The input waves change with height and period.The results show that the amplitudes of wave-induced pore pressure increase as the wave period increase, and decay from the surface to the bottom of seabed.Higher pore pressures are recorded at the pipeline top and the lower pore pressures at the bottom, especially in the sand seabed.The normalized pressure around pipeline decreases as the relative water depth, burial depth or scattering parameters increase.For the silt seabed, the wavelet transform has been successfully used to analyze the signals of wave-induced pore pressure, and the oscillatory and residual pore pressure can be extracted by wavelet analysis.Higher oscillatory pressures are recorded at the bottom and the lower pressures at the top of the pipeline.However, higher residual pressures are recorded at the top and the lower pressures at the bottom of the pipeline. |
| 中文摘要: |
| A series of regular wave experiments have been done in a large-scale wave flume to investigate the wave-induced pore pressure around the submarine shallowly embedded pipelines.The model pipelines are buried in three kinds of soils, including gravel, sand and silt with different burial depth.The input waves change with height and period.The results show that the amplitudes of wave-induced pore pressure increase as the wave period increase, and decay from the surface to the bottom of seabed.Higher pore pressures are recorded at the pipeline top and the lower pore pressures at the bottom, especially in the sand seabed.The normalized pressure around pipeline decreases as the relative water depth, burial depth or scattering parameters increase.For the silt seabed, the wavelet transform has been successfully used to analyze the signals of wave-induced pore pressure, and the oscillatory and residual pore pressure can be extracted by wavelet analysis.Higher oscillatory pressures are recorded at the bottom and the lower pressures at the top of the pipeline.However, higher residual pressures are recorded at the top and the lower pressures at the bottom of the pipeline. |
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