scholarly journals A perturbative view on the subsurface water pressure response at hillslope scale

2008 ◽  
Vol 44 (5) ◽  
Author(s):  
E. Cordano ◽  
R. Rigon
Keyword(s):  
Water Pressure ◽  
Pressure Response ◽  
Subsurface Water ◽  
Hillslope Scale

Prediction of pore-water pressure response to rainfall using support vector regression

2016 ◽  
Vol 24 (7) ◽  
pp. 1821-1833 ◽  
Author(s):  
Nuraddeen Muhammad Babangida ◽  
Muhammad Raza Ul Mustafa ◽  
Khamaruzaman Wan Yusuf ◽  
Mohamed Hasnain Isa
Keyword(s):  
Support Vector Regression ◽  
Pore Water ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Pressure Response ◽  
Support Vector

Stability Analysis of Unburied Offshore Pipeline on Carobonate Soil Under Severe Storm Condition

2007 ◽  
Author(s):  
Tomiya Takatani ◽  
Takanori Kaya
Keyword(s):  
Cyclic Loading ◽  
Pore Pressure ◽  
Water Pressure ◽  
Pressure Response ◽  
Severe Storm ◽  
Spring Element ◽  
Offshore Pipeline ◽  
Non Linear ◽  
Linear Spring ◽  
Storm Condition

The purpose of this paper is to investigate the stability of an unburied offshore pipeline resting on carbonate sand under severe storm condition. Pore pressure accumulation and pipeline movement during cyclic loading caused by waves and currents are numerically investigated. Both drag and lift forces are numerically obtained for 100 years return period storm condition using the Fourier decomposition method. Non-linear spring element is used to simulate a slip phenomenon between pipeline and seabed. The effects of both bi-linear and tri-linear spring element models on pipeline movement and pore pressure response are numerically investigated. Pipeline movement during cyclic loading greatly depends on the mechanical properties of non-linear spring element. In addition, pore water pressure response as well as shear strain are more sensitive to the initial unit tangential stiffness of spring element.

scholarly journals Contribution of Pumping Action of Wave-Induced Pore-Pressure Response to Development of Fluid Mud Layer

2019 ◽  
Vol 7 (9) ◽  
pp. 317 ◽  
Author(s):  
Yang ◽  
Zhu ◽  
Liu ◽  
Sun ◽  
Ling ◽  
...  
Keyword(s):  
Pore Pressure ◽  
Fine Particles ◽  
Pore Water Pressure ◽  
Theoretical Calculations ◽  
Water Pressure ◽  
Pressure Response ◽  
Excess Pore Pressure ◽  
Pore Pressure Response ◽  
Wave Induced ◽  
Excess Pore

To investigate the vertical migration response of fine sediments, the pore pressure response of the silty seabed under the action of waves was tested. Under the action of waves, there is an obvious pumping phenomenon in the sludge accumulated by pore pressure. The excess pore water pressure caused by the waves in the seabed is unevenly distributed with respect to depth and there is an extreme value of up to 1.19 kPa. The pressure affects the liquefaction properties of the sludge. According to instantaneous-liquefaction judgment, the liquefaction of surface soil occurs, but the soil is not completely liquefied. Using theoretical calculations, the vertical source supply of floating mud development was analyzed. The pumping effect of the wave-induced excess pore pressure manifests in two aspects, as follows: (1) The centralized migration of splitting channels, which is visible to the naked eye, and (2) the general migration of fine particles between particle gaps at the mesoscopic level, which accounts for up to 22.2% of the migration of fine particles.

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