Project 0-6493

Pullout Resistance of Mechanically Stabilized Earth Reinforcement in Backfills Typically Used in Texas

MSE Test Box

TxDOT MSE walls are currently designed using default resistance factors that are considered to be conservative estimates—and might be less than optimum  for the wall design. In order to reduce construction costs, this project seeks to determine the true resistance  of the backfills that are typically used in MSE walls in Texas.

This project aims to address two separate issues involving pullout resistance of backfill reinforcement used in Mechanically Stabilized Earth (MSE) walls — the development of specific pullout resistance factors for backfill materials used in Texas, and experimental evaluations of typical reinforcement methods used to circumvent vertical obstructions. To conduct the tests needed, Texas Tech built a 12’x12’x4’ test box capable of simulating up to 40’ of fill depth, one of  the largest of its kind in the world.



William D. Lawson


Contact Information

William D. Lawson, P.E., Ph.D.
Department of Civil Engineering
Texas Tech University
Lubbock, TX 79409-1022

Tel:(806) 834-5690 
Fax: (806) 742-0444