Submitted by v.schaefer on Mon, 10/31/2022 - 21:11
Placement of fill materials on geogrid overlying soft subgrade soils.
Placement of fill materials on geogrid overlying soft subgrade soils. 

Project Summary/Scope:

During the construction of a new parking lot and driveway, weak, unstable soils with very low shear strength were encountered. Bad weather caused water to accumulate across the site, which saturated the subgrade. The site was already at the elevation grade for the aggregate road base, so the client didn’t want to excavate and did not have a lot of room to use a thick section of aggregate.

The existing pavement section was analyzed to calculate planned design life. Ultimately the client decided on a stabilization solution using advanced multi-axial geogrid. The geogrid design increased pavement performance while saving on cost of removal/replacement.

Complementary Technologies Used:  N/A

Alternate Technologies:  Chemical stabilization was considered but it proved to be much slower and expensive compared to geogrid stabilization.

Photograph of layout of geogrid.
Photograph of layout of geogrid.

Performance Monitoring:  N/A

Cost Information:  N/A

Case History Author/Submitter:  Eden Thomas, P.E., Tensar Area Engineer; ethomas@tensarcorp.com

Project Technical Paper:  N/A

Date Case History Prepared: December 2021

Case History Prepared By: Katie Phillips

 

Photograph of layout of geogrid around obstructions.
Photograph of layout of geogrid around obstructions.

 

Title
Veterans Administration Facility Parking Lot and Driveway
Location
Corpus Christi, Texas
Year
2021
Technology
Mechanical Stabilization of Subgrades and Bases
Owner
Veterans Administration (US Federal Properties, LLC)
Contractor
Jacobsen Construction