Geotextile Filter Design Critique

2009 ◽  
pp. 132-132-30 ◽  
Author(s):  
RF Wilson-Fahmy ◽  
GR Koerner ◽  
RM Koerner
Keyword(s):  
Filter Design ◽  
Geotextile Filter

Geotextile filter design guide

1992 ◽  
Vol 11 (4-6) ◽  
pp. 355-370 ◽  
Author(s):  
S.M. Luettich ◽  
J.P. Giroud ◽  
R.C. Bachus
Keyword(s):  
Filter Design ◽  
Design Guide ◽  
Geotextile Filter

scholarly journals Effect of the Number of Constrictions on the Filtration Behaviour of a Soil-Geotextile System

2020 ◽  
Vol 28 (1(139)) ◽  
pp. 87-92
Author(s):  
Anna Miszkowska ◽  
Anna Miszkowska ◽  
Eugeniusz Koda ◽  
Zygmunt Krzywosz
Keyword(s):  
Selection Criteria ◽  
Fine Particles ◽  
Filter Design ◽  
Ratio Test ◽  
Flow Through ◽  
Gradient Ratio ◽  
Geotextile Filters ◽  
Nonwoven Geotextile ◽  
Geotextile Filter ◽  
Base Soil

Nonwoven geotextile filters have been used in geo-environmental engineering for decades to prevent the movement of base soil fine particles, allowing adequate seepage to flow through the geotextile plane. Most of the design criteria developed for nonwoven geotextiles are based only on the comparison between their characteristic opening size and the indicative diameter of the soil to be filtered. In the meantime, the nonwoven geotextile fibrous structure has an influence on the filtration of the soil-geotextile system. In this paper the numbers of constrictions of nonwoven geotextile samples were determined to verify the existence of a correlation between the geotextile structure and the filtration behaviour of soil-geotextile systems. The compatibility between an internally unstable soil and a nonwoven geotextile filter was evaluated using the gradient ratio test. The results obtained can also be the basis for modifying the geotextile filter design and selection criteria.

A new theoretical method to evaluate the internal stability of granular soils

2012 ◽  
Vol 49 (1) ◽  
pp. 45-58 ◽  
Author(s):  
Nicola Moraci ◽  
Maria Clorinda Mandaglio ◽  
Domenico Ielo
Keyword(s):  
Fine Particles ◽  
Filter Design ◽  
Critical Diameter ◽  
Theoretical Method ◽  
Rigid Wall ◽  
Spherical Particles ◽  
Granular Soils ◽  
Internal Stability ◽  
Granular Base ◽  
Geotextile Filter

The geotextile filter design is particularly complex when granular base soils are internally unstable. In these conditions, the design criteria available in literature are not always reliable. This paper deals with a new theoretical method developed to evaluate the internal stability of granular soils. To simulate, theoretically, the filtration process inside these soils, a set of spherical particles and different soil relative densities have been considered. The soil has been represented by means of a sequence of parallel layers, containing constrictions and particles, placed upon each other at a distance, in the direction of hydraulic flow, which is a function of the soil relative density. The movement of the fine particles through the different soil layers has been simulated by means of a mechanism that compares each particle contained in the i layer with the constrictions contained in the next i + 1 layer. The results of the numerical simulations were used to evaluate the internal stability of the analyzed granular soil and the corresponding critical diameter of suffusion, Dc. Finally, the reliability of the proposed theoretical method was evaluated by means of the results of experimental long-term filtration tests performed using a rigid-wall permeameter on different unstable granular soils.

Towards optimum multilayer filter design

1991 ◽  
Vol 138 (4) ◽  
pp. 241 ◽  
Author(s):  
T.C. Chen
Keyword(s):  
Filter Design
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