JMEC has been structural engineer to design a retaining wall system to stabilize the roadway along the Ygnacio Valley Road.  A section of of this roadway has cracked due to a continuous movement of adjacent slide.

Wall types considered including secant wall with and without tie-backs, and soldier pile concrete lagging wall with tie-backs.  The earth at the toe of the slide was partially excavated to reduce overburden as recommended by the geotechnical engineer.

The maximum wall height is more than 11-ft and the length of tie-back is more than 30-ft.  During construction, JMEC performed field verification and structural observation to ensure that the prestressing and grouting operation of the tie-backs were conforming to project requirements, including proof load and lock-in forces.
Project Role:  Structural Engineer

Clients:  City of Concord

Schedule:  Construction was completed in 2009
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165 Lennon Lane, Suite 106, Walnut Creek, CA 94598
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 Construction of Tie-backs
 Completed Wall except Planting
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