Results 11 to 20 of about 2,866,395 (294)

Development of a pore pressure sensor employing fibre Bragg gratings [PDF]

open access: yes, 2008
Monitoring pore pressure is important to understand and predict the mechanical behaviour of soil, helping engineers to assess the stability of slopes and built infrastructures.
Gonçalves Correia, Ricardo Nuno
core   +7 more sources

Yield stress fluids method to determine the pore size distribution of a porous medium [PDF]

open access: yes, 2014
In this paper a new method is presented in order to determine the pore size distribution in a porous medium. This original technique uses the rheological properties of some non-Newtonian yield stress fluids flowing through the porous sample.
AMBARI, Abdelhak   +2 more
core   +1 more source

Pore pressures and strains after repeated loading of saturated clay [PDF]

open access: yes, 1974
Repeated and sustained loading tests on undrained samples of normally consolidated lacustrine clay are used to prove the existence of a relationship between pore water pressures and axial strains.The behavior of the clay is studied by investigating the ...
Greenwood, JR   +3 more
core   +1 more source

Experimental study on effect of initial static pore water pressure on static and dynamic shear properties of sand

open access: yesYantu gongcheng xuebao, 2019
A series of undrained cyclic torsional shear tests and monotonic torsional shear tests are carried out on Fujian standard sand and Hutuo River fine sand under different initial static pore water pressures by using the hollow cylinder torsional shear ...
XU Cheng-shun 1, LI Yan-mei 1,2, PAN Xia 1, GENG Lin 1
doaj   +1 more source

Measurement and Evaluation for Interbedded Pore Water Pressure of Saturated Asphalt Pavement under Vehicle Loading

open access: yesApplied Sciences, 2020
Dynamic water scouring damage is the main cause of pavement structure damage, and the main reason for dynamic water scouring damage is the rapid change of pore water pressure caused by vehicle load.
Wuxing Chen   +3 more
doaj   +1 more source

Real-Time Pore Pressure Detection: Indicators and Improved Methods

open access: yesGeofluids, 2017
High uncertainties may exist in the predrill pore pressure prediction in new prospects and deepwater subsalt wells; therefore, real-time pore pressure detection is highly needed to reduce drilling risks.
Jincai Zhang, Shangxian Yin
doaj   +1 more source

Acceleration of Debris Flow Due to Granular Effect

open access: yesFrontiers in Earth Science, 2021
Pore water pressure has been recognized as an important factor to enhance the mobility of debris flow moving in channel of very gentle slope. The creation and dissipation of pore water pressure are associated with interaction between grains.
Taiqiang Yang   +11 more
doaj   +1 more source

ENHANCING PORE PRESSURE PREDICTION IN OIL WELL DRILLING: A COMPREHENSIVE STUDY OF WELL PLANNING AND COST-EFFECTIVE MODELING IN THE NIGER DELTA REGION [PDF]

open access: yesEngineering Heritage Journal, 2023
Accurate pore pressure prediction is pivotal in drilling operations, impacting safety, well design, and cost-effectiveness. This research paper aims to assess various pore pressure prediction methods, particularly in transition zones.
Kelechi Anthony Ofonagoro   +3 more
doaj   +1 more source

Pore Pressures in Simple Shear

open access: yesSoils and Foundations, 1986
ABSTRACT Measurements made of the changing stress state during a constant volume simple shear test on kaolin permit the implied pore pressure change to be divided into a component due to change in total mean stress and a component due to dilatancy of the soil.
Airey, D. W., Wood, D. M.
openaire   +3 more sources

Numerical simulation on the effect of pore pressure gradient on the rules of hydraulic fracture propagation

open access: yesEnergy Exploration & Exploitation, 2021
To clarify the influence of pore pressure gradient on hydraulic fracture propagation, the stress distribution in and around the borehole is explained by theoretical analysis method in this paper.
Weiyong Lu, Changchun He
doaj   +1 more source

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