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Keywords: trench
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Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-205
... useful for the security of hot-tap region. Convenient for hot-tapping operation and the new pipeline accessing, a T-shape trench should be dug in advance. But the trench will make more difficult for protection frame design and installation. And it also brings a lot of consequences for the determination...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-158
... ABSTRACT An insight is provided into the construction plan and risks associated with the deep trenching of a 30inch diameter natural gas pipeline by water jetting method. Throughout the design and construction process, careful considerations have been given to the project's environmental...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-163
... midstream oil & gas piping design criterion imperfection upstream oil & gas resistance upheaval dnv-rp-f110 offshore pipeline mobilization distance uplift mobilization distance uhb design load factor piping simulation uplift resistance stiffness failure load trench...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2170
...ABSTRACT ABSTRACT The effect of trenches due to riser-soil interaction on the fatigue life of SCRs has attracted attentions of scholars. In this work, the formation of trenches under SCRs was simulated rapidly by applying extreme sea states. By considering variations of water depth, floater...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2208
...ABSTRACT ABSTRACT Floating wind turbine is a better choice compared to monopile and jacket foundation in deep water. In fact, the reciprocating motion of floating wind turbine may lead to a trench near the mooring foundation. In this paper, a numerical method for predicting the trench evolution...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-574
... by trenching and refilling the soil. However, the cost is relatively high and it is time-consuming (Fredsøe, 2016). To date, a few FEM (Finite Element Method) numerical models have been proposed for investigating a more complicated Wave-Seabed-Structure Interactions (WSSI) involving a trenched pipeline...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-138
... trench seabed surface clay content experiment wave height pore water pressure clayey soil interaction mixed bed accumulation reservoir characterization pore pressure wave-seabed interaction engineering liquefaction net upward pressure gradient upstream oil & gas...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-658
... ABSTRACT Physical modelling of trench infill, for trenches perpendicular to the flow direction, was undertaken in the Fast Flow Facility at HR Wallingford. Parameters including trench width, flow velocity (including reversing tidal flow), and the presence of berms along the sides of the trench...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-194
... element must be installed one by one. And the installation work exposed to sea loads, time window selection was needed, it was considered extremely challenging to complete the project on time. siltation tunnel project construction foundation layer preliminary design chamfer trench hongkong...
Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-352
... sub-district diameter erosion trench tsunami sediment thickness tsunami tsunami wave Morphological changes and Tsunami deposits Studies around Northern Part of Sumatra Island, Indonesia 0XVD $O¶DOD1, Syamsidik1,2, Teuku Mudi Hafli1, and Mirza Fahmi1 1 Tsunami Computation and Visualization...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-233
... Abstract A great tsunami had stroke the northern coast of Taiwan in 1867. The study area is focused on Gongliao District, New Taipei City. The assumed earthquake scenario originated from Yap Trench is used for Cornell University tsunami model (COMCOT model) which simulates the wave height...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-771
... direction, time after installation, duration and number of load cycles, and soil conditions. Stationkeeping of the floating platform requires proper understanding of the performance of the various components of the mooring system. Recently, there have been discoveries of seabed trenches in the vicinity...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-223
.... A full line geometry will typically consists of sections with i) pipe free spans down from hubs, ii) short rock covered hub approaches, and iii) midline sections that are rock dumped on the seabed or trenched below the seabed with natural backfill. Different methods are used to obtain protection or line...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-504
... ABSTRACT In this paper we describe a series of experiments that have been performed in a recirculating flume (O-tube) under steady (current) velocity and combined steady and oscillatory (wave) velocity, to investigate the backfill of narrow trenches. The experiments are discussed in terms...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-339
... ABSTRACT The induced density-stratified fluid motion for a solitary wave past a submarine trench is investigated numerically by means of the three-dimensional Navier-Stokes (N-S) solver named Truchas. The volume of fluid (VOF) method is used to trace the free surface and the transport...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-417
... ABSTRACT Taught by the lesson from the 2011 Tohoku earthquake and tsunami, we aim to probe into the potential large-scale trench-typed tsunami threats to Taiwan by means of the deterministic method. In this paper, 18 trench-typed tsunami sources and the 4 fault-typed tsunami sources...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-355
... trench bottom. This helps to provide information in constructing the tunnel of Hong Kong-ZhuHai-Macao Bridge. Additionally, we simulate numerically the tube tunnel element with identical physical conditions in experiments, by our design of the sharp interface two-phase solver. By comparison...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-261
... ABSTRACT: Recent publications believe that sophisticated non-linear hysteretic seabed interaction models can provide a consistent way of trench modeling beneath the riser to study its impact on fatigue performance of steel catenary risers, a question with diverging answers in the literature...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-390
... by US Cornell University, is adopted for tsunami simulation. A numerical experiment was implemented by employing the relevant data to Japan's Tohoku tsunami. Tsunami simulation for preliminary Taiwan-specific early warning system began to carry out by investigating Ryukyu Trench, the fault zone...
Proceedings Papers

Paper presented at the The Twentieth International Offshore and Polar Engineering Conference, June 20–25, 2010
Paper Number: ISOPE-I-10-351
... bottom (natural topography or artificial structures) tends to deform the free surface and generate vortices in the regions with changing water depth. This study focuses on modeling the propagation of an incident solitary wave past a rectangular cavity (trench). The kinematic motions of the particles...

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