The Vasco Rd Safety Improvements Project - Phase 1 is designed to improve the safety of approximately 1 mile of Vasco Rd between the cities of Brentwood and Livermore. This stretch of twisting Vasco Rd has heavy, fast moving traffic and a history of serious injury accidents. The project consists of installing a concrete median barrier along the 1 mile project limits and widening the southbound pavement to provide a truck climbing lane, thereby eliminating the gap in the existing truck climbing lanes along Vasco Rd. To accommodate these safety improvements, 6 retaining walls, storm drains, wildlife crossings, and a bridge widening will be constructed. This project is anticipated to take 1.5 yrs (2 construction seasons) to complete, anticipated in December 2011. Check out this blog from time to time to see updates on construction progress and facts about the project.

Wednesday, December 29, 2010

Cast In Place Facing Walls

Teichert Construction has completed portions of the Cast in Place (CIP) facing walls that will ultimately provide the architectural facing along all the retaining walls on Vasco Rd. Upon completion of the soil nail installation and shotcrete facing walls, a CIP wall is then installed to create the final wall face and grades along the future road shoulder widening. A concrete barrier will be installed at the bottom of the wall, to "mirror" the future median barrier.



Wall 2 CIP facing wall forms.



Wall 2 CIP forms and steel reinforcement.



CIP facing wall and exposed shotcrete, geocomposite drains, and soil nails at Wall 2.



"Fractured Fin" Finish at Wall 2.
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Concrete Wall 1

Teichert Construction completed the foundation for Concrete Wall 1 in November. This relatively small retaining wall is designed to support the the southbound Vasco Rd embankment at the southern limit.



Initial grading at Wall 1.



Extension of reinforcing steel up from Wall 1 footing.


Wall 1 footing.
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Completion of Soil Nails

By mid November, Teichert Construction completed installation of all the soil nails associated with Walls 4, 6, and 7. Over 900 nails were installed in the hillside to secure the slopes to the recently formed shotcrete walls. Nail lengths varied from 15 ft to 60 ft deep into the hillside. A fractured fin texture will become the final finish when the cast in place facing walls are poured next.


Completed soil nails at Wall 6.
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Brushy Creek Banks Complete

At the end of October, Teichert Construction completed backfilling operations around the new Brushy Creek bridge abutments. In conjunction with the final earthwork operations, rock slope protection (RSP) was relocated to shape the banks around the abutments to protect the final slopes from erosion.


Looking upstream along Brushy Creek.
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