Mohon Tunggu ...

About Us

Geoforce Indonesia is a company engaged in the field as a geosynthetic soil reinforcement materials with main product segmental retaining wall, earthwork, geosynthetic and soil improvement

Project Consulting

Contact Info

Various Applications


Geosynthetics can be effectively used as drainage and filters in civil works and environmental engineering as an addition to or substitute for conventional granular materials. Geosynthetics are easier to install in the field and often cost less when the available granular material does not meet specifications, or has some constraints on applicable environmental regulations.



Geotextiles and geocomposites are types of geosynthetics that are often used for drainage and filtration. This material can be used in retaining structures, embankments, erosion control, waste disposal areas and others.



As a drainage material, geosynthetics can be used for hydraulic purposes which allow the free flow of liquids or gases in the plane or across the material.



The geotextile filter must meet the criteria that ensure that the subgrade grains will be retained but the flow of water must not be restrained. Retention criteria can be formulated:

FOS ≤ nDs

Where :

FOS    = geotextile filter size, depicted on the openings and size constraints within the geotextile,

n         = a number depending on the criteria used,

Ds       = a dimension represents the basic grain size of the soil. Usually D85, which is the diameter where 85% of the total weight of the soil is smaller than the diameter figure.

The filter material must also be more permeable than the subgrade during its service life. Therefore, the permeability criteria for geotextiles are in accordance with the equation:

kG ≥ n kS

where kG is the permeability coefficient of the geotextile, n is a number depending on the characteristics of the project application (typically varies between 10 and 100) and kS is the permeability coefficient of the subgrade. The clogging criteria ensure that the geotextile will not clog and are based on the relationship between the size of the geotextile filter opening and the diameter of the soil particles that should be piped through the geotextile. Filter performance tests can also be carried out in the laboratory to evaluate whether the geotextile to be used is suitable for the soil to be filtered.