Designing for geoelectrical liner integrity and leak-location surveys

August 1, 2006  |  Products

What to look for (and to look out for!) when designing lining systems for electrical integrity/leak-location surveys. By Ian D. Peggs As the need to perform geoelectrical liner integrity (for CQA) and leak-location (problem resolution) surveys becomes more of a regulated requirement, it becomes more…
Sand-confinement grids from Geocell Systems

June 1, 2006  |  Products

In the wake of the floods following Hurricane Katrina, officials are working to figure out how to prepare and respond to other natural disasters involving flooding, and the need for improved water barriers. The U.S. Army Corps of Engineers (USACE) is now in the process of testing new, so-called &ldq…
Biodegradable staple system introduced

June 1, 2006  |  Products

American Excelsior Co. and Uzet World Dublin have partnered to introduce e-Staple to the erosion-control industry. The devices offer an option in biodegradation from cold to warm conditions and will not soften during storage through humidity pickup. The e–Staple product can also be used on coa…
Selecting reinforced fill soil for MSE retaining walls

June 1, 2006  |  Products

A full-scale field test is currently being conducted to establish properties for “high fines” reinforced soils and associated design controls that give acceptable MSE wall performance. By Richard P. Stulgis Mechanically Stabilized Earth (MSE) retaining walls on public sector transportati…
The enhancement of interface shear strength between two nonwoven geotextiles

April 1, 2006  |  Products

By Gregory N. Richardson and Pieter K. Scheer Introduction and problem statement Interfaces involving nonwoven to nonwoven geotextile surfaces are sometimes part of the design of landfill liner systems. This is most likely the case in a double-liner system where a geosynthetic clay liner (GCL) is of…
Eight ways to achieve improved retaining-wall performance

April 1, 2006  |  Products

A refresher course for SRW success. By Michael R. Simac Segmental Retaining Wall (SRW) performance can be improved greatly by implementing good construction techniques. Since SRW construction started some 20 years ago, a number of good guidelines have proven to be at the core of a properly executed …
Versavoid Modular Geovoid System allows for use and reuse of water

August 5, 2001  |  Products

The Versavoid Modular Geovoid System, a lightweight porous polypropylene structured cube about 50cm2, acts as a drainage system when placed on top of a trench or void lined with a geotextile. By plumbing a filtration unit into the system, stormwater can be passed into a storage tank and recycled for…
Apparent cohesion leads to eventual failure

January 1, 1970  |  Products

These photos show a wall failure next to a corner. This failure occurred in an area where successive triangular sectors of geogrid layers were not installed. Failure is to be expected because reinforced walls without reinforcement should fail. Curiously, this failure occurred about one year after th…
Inadequate compaction necessitates massive remedy

January 1, 1970  |  Products

These photos show a massive remedy utilizing anchors needed for an initially inexpensive geotextile reinforced wall. One reason that necessitated this remedy is poor compaction. Also, risers collecting surface water were embedded in the reinforced soil zone. These risers were connected sequentially …
Geotextiles

January 1, 1970  |  Products

These products are engineered to provide cost-effective solutions to meet specific design requirements for separation, reinforcement, filtration, drainage, and protection applications. Although engineers have developed numerous applications for geotextiles, there are five major functions: separa…