Full-Scale Testing of a Shored Mechanically-Stabilized Earth (SMSE) Wall Employing Short Reinforcements
Publication: Geosynthetics in Reinforcement and Hydraulic Applications
Abstract
Mechanically stabilized earth (MSE) walls are frequently constructed to accommodate widening of existing roads or construction of new roadways in steep terrain. Because substantial excavation must be performed to establish a flat bench upon which to construct the MSE wall, unshored construction may not be feasible. Therefore, a shoring wall is often constructed to stabilize the backslope to facilitate MSE wall construction. Full-scale testing was conducted to examine two hypotheses with regard to shored mechanically stabilized earth (SMSE) walls: (1) construction of an MSE wall in front of a rigid backslope (i.e., shoring system) results in reduced external lateral loading on the MSE wall compared to a conventional MSE wall; and (2) full connection of the MSE reinforcements to the shoring wall provides limited benefit. The full-scale test model was constructed using short geosynthetic reinforcements, ranging in length from 25 to 39 percent of the wall height. The test model was equipped with strain gages, pressure cells (horizontal and vertical), linear variable displacement transducers (LVDT), potentiometers, and inclinometers, as well as surveyed using optical methods. The test wall was extremely stable, even under unrealistically high footing surcharge loads, i.e. 10 times the normal traffic loading. Interpretation of the instrumentation data yielded significant results regarding potential arching effects, internal wall pressures, and reinforcement strains.
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Copyright
© 2007 American Society of Civil Engineers.
History
Published online: Jun 20, 2012
ASCE Technical Topics:
- Construction engineering
- Construction methods
- Design (by type)
- Engineering fundamentals
- Field tests
- Full-scale tests
- Geomechanics
- Geotechnical engineering
- Highway and road management
- Highway transportation
- Highways and roads
- Infrastructure
- Load factors
- Load tests
- Retaining structures
- Shoring
- Soil dynamics
- Soil mechanics
- Soil stabilization
- Structural design
- Structural engineering
- Structural members
- Structural systems
- Tests (by type)
- Transportation engineering
- Walls
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