On the required connection strength of geosynthetically reinforced walls

• Published in: Geotextiles and geomembranes 1997-08, Vol.15 (4), p.377-393
• Main Authors: Soong, Te-Yang, Koerner, Robert M.
• Format: Article
• Language: English
• ISSN: 0266-1144; 1879-3584
• DOI: 10.1016/S0266-1144(97)10016-4

The use of geosynthetics for the reinforcement of retaining walls, bridge abutments, and wing walls has progressed rapidly over the past 10 years. Design of the reinforcement, along with the requisite testing, has also advanced in a parallel manner. There is, however, an issue that has been raised over the required connection strength of the reinforcement to the wall facing. Theoretically it is felt, and shown numerically herein, that the required force is very small. Essentially all known wall systems can mobilize such forces. What is of concern is a number of short- and long-term issues during and after the wall is constructed which can possibly add to the theoretically required connection strength. They are individually described herein. Furthermore, they are grouped into three types of stress mobilizing situations: uniform settlement, localized asymmetric deformation and localized symmetric deformation. A parametric evaluation of each situation is offered illustrating the possible magnitude of increase of connection stresses beyond the theoretical value under a hypothetical set of conditions. While the values can become high, all scenarios can (and should) be avoided. Clearly, there should be no pressing concern over connection strength with proper design followed by proper construction practice.