mirage

A study of infiltration on three sand capillary barriers.

DSpace/Manakin Repository

 

Search DR-NTU


Advanced Search Subject Search

Browse

My Account

A study of infiltration on three sand capillary barriers.

Show full item record

Title: A study of infiltration on three sand capillary barriers.
Author: Yang, Hong.; Rahardjo, Harianto.; Leong, Eng Choon.; Fredlund, Delwyn G.
Copyright year: 2004
Abstract: The capillary barrier effect was investigated by conducting infiltration tests on three soil columns of fine sand over medium sand, medium sand over gravelly sand, and fine sand over gravelly sand. The barrier effect was verified in the underlying layer of coarser material, and the water-entry values of the coarser layers were confirmed to be nearly equal to the residual matric suctions of the soils. The coarser layer of gravelly sand, which had a lower water-entry value, was more effective in forming a barrier than the coarser layer of medium sand, which had a higher water-entry value. When the capillary barrier was comprised of a coarser layer of gravelly sand, there was more water stored in the finer layer at the end of the drying stage than when the capillary barrier was comprised of a coarser layer of medium sand. Non-equilibrium static conditions of pore-water pressure profiles were observed in the three soil columns, and a generalized ultimate pore-water pressure profile of a capillary barrier system was proposed. In addition, the final volumetric water contents versus matric suctions of the soils as measured from the soil columns were reasonably consistent with the soil-water characteristic curves (SWCCs) of the soils, suggesting that the drying SWCC of a soil could also be obtained from the drying process in a soil column (or a capillary open tube). The drying SWCC could be established from measurements in the soil column up to a height corresponding to two times the residual matric suction head of the soil.
Subject: DRNTU::Engineering::Civil engineering::Geotechnical.
Type: Journal Article
Series/ Journal Title: Canadian geotechnical journal
School: School of Civil and Environmental Engineering
Rights: © 2004 Canadian Science Publishing
Version: Accepted version

Files in this item

Files Size Format View

There are no files associated with this item.

   

DOI Query

- Get published version (via Digital Object Identifier)
   

This item appears in the following Collection(s)

Show full item record

Statistics