Laguna Beach, Calif. PCH
Unique Features:
This project exemplifies many unique features of the Stresswall Product. The project developer for the South Coast Medical Center Hospital expansion project, Sheldon Pollock in Santa Monica, requested that we provide a wall that would eliminate shoring that would have been required for any other wall option to support the existing Hospital embankment.
We proposed the “Terrace Wall” counterfort wall option which could be installed w/o shoring. A new building was to be constructed in front of and at a lower elevation than the existing five story structure. To do this a portion of the sloping embankment in front of the existing center would have to be removed w/o disturbing the existing building (maximum allowed settlement would have to be less than 0.5 inch!
To accomplish this the contractor cut deep slots into the existing slope between the existing deep caisson foundation for the existing structure. Since the site was is a stones throw from the ocean there is always a risk of morning rains etc. so the contractor was required to provide a site cover to eliminate any potential erosion should storms occur during wall construction. The slope face was covered every night and over weekends.
Following the slot cutting the contractor placed the open face counterforts in the slots and backfilled the portion of the counterforts w/in the slot cuts with slurry. Subsequently the .5 meter wide wall panels were placed in the Terrace Wall reverse batter voids.
Due the the spacing and orientation of the wall panels there is approximately half of the wall face area that could be planted. By selecting maintenance free, continuously blooming plants with an emitter irrigation system the concrete members quickly disappeared as the planting matured. As can be seen from the shots the result is a constantly changing pallet of color instead of a stark industrial look as would be the case for a conventional wall. In addition, the wall reduces the effect highway and other noise sources which is an advantage for patients in the new structure.
At the request of the ASCE we presented the Project for their annual meeting due to the unique features and advantages of the counterfort wall system.
| Area |
Sheldon Pollock Client |
Plantable Wall Scope Of Work |
Chula Vista, Calif.
Unique Features:
The result of a VECP submittal by Faltiron Construction the Stresswall option was selected due to speed of erection and cost savings due to elimination of shoring that would have been required for any other wall option at that location. Typical shots show the “slot cut” excavation method wherein the existing emabankment was substantially left in place instead of removal which would have been required for other wall types. By cutting 4″ wide slots into the embankment at 15′ centers the precast counterforts could be placed w/o total wall excavation or any site shoring.
| Area |
SANDAG Client |
E 80 & LRT Track Support WallWall Scope Of Work |
Pacifica, Calif.
Unique Features:
The precast wall was an alternate in the Woodward-Clyde bid package and was selected by Granite Construction over the MSE wall alternate. An integral wave deflector was monolithically cast with the top wall panels instead of the field cast cap that was shown for the MSE wall.
Prior to the wall installation a trench was cut into the slope and a cip cut off wall was constructed behind rip rap. The precast wall components were then installed. Since sand was used for wall fill filter fabric/geotextiles were placed over the fill side of the precast elements.
The wall has been subjected to many extreme load conditions compared to a typical seawall/erosion control structure. Locals claim that the tallest wave ever recorded in North America occurred at Pacifica. There are shots of these giant waves at local establishments. Some smaller waves are shown crashing into the wall in the shots.
Also the wall was impacted by the San Francisco earthquake which hit shortly after the wall was completed. The existing MSE wall north of the fishing pier has not fared so well. We understand that due to the corrosion of the metal soil reinforcement and movement fill has been lost from behind the wall. To address this issue the city has apparently refilled voids with concrete fill. There have been no issues with the Stresswall Structure.
| Area |
City of Pacifica Client |
Scope Of Work |
Laughlin, Nevada
Unique Features:
The wall was installed into an existing embankment at the east end of the Hilton site along the Colorado River in 1989. The structure was built concurrently with the building construction. Depending on electrical power generation demands river flow rates vary on a daily basis. The wall was designed for water surface elevation variations of up to 12′ per day. To prevent fines migration filter fabrics/geotextiles were placed on the fill side of the wall structure.
| Area |
Hilton Client |
Scope Of Work |
Wiley Canyon Road
Unique Features:
To lengthen the radius of a curve as well as to smooth out the road alignment a cut was required for Wiley Canyon. To accomplish this without shoring the Stresswall system was selected. Although the wall face is at a 1:12 batter (essentially vertical) random planting areas within the wall face for internal landscaping options were made possible with the large random planting “pockets” in the wall face. Plants included both large flowering bushes as well as vines and ivy.
The counterforts were placed in slots cut into the existing embankment so that no shoring was required as would have been the case for other wall options. Wall cut was utilized for wall fill.
| Area |
Noveco Inc. Client |
Installation of Stresswall into Existing Slope Scope Of Work |
SR 31 @ Canadian Border
Unique Features:
Single tier seawall structure placed along WashDOT SR31 at the Canadian Border.
The counterforts were placed in slots cut into the existing roadway embankment. Due to the constant border traffic it was necessary to construct the wall as one lane was kept open. Other wall options would have required shoring.
Cut material was utilized for wall fill.
| Area |
WashDOT Client |
Seawall for Embankment Support Scope Of Work |
Sorrento Valley, Calif.
Unique Features:
By utilizing the “slot cut” installation method temporary shoring was eliminated that would have been requires for other wall types. Therefore the overall wall cost and construction time was greatly reduced compared to other wall options.
| Area |
Noveco Inc. Client |
Cut Wall w/o shoring Scope Of Work |
Salt Lake City Ut. Airport
Unique Features:
Retro fit existing closed face MSE wire wall with full height architectural finish panels. No earth pressure can be transferred to the fascia panels since the “gap” between the panels and the MSE wall is filled with styrofoam “peanuts” (pellets). In addition, the tie rods that secure the panels to the MSE wall, are encased in an oversized sleeve to prevent any shear loads from being transferred to the rods should there me any wall foundation consolidation.
| Area |
Client |
Full Height Fascia Panel MSE Wal Scope Of Work |
Denver, Colo.
Unique Features:
For this project both the wall foundation and the wall face utilized precast double tee segments that were post tensioned together in the field. In addition, to eliminate shoring that would have been required for conventional wall options, the double tee footing extended in front of the wall. To increase sliding resistance a cip grade beam was linked to the double tee foundation segment following wall erection. Due to the post tensioning the wall tee stems are always in compression thereby eliminating the possibility of tension cracks forming on the fill side of the wall which can occur with typical cip walls.
| Area |
Denver Public Schools Client |
28' Parking Lot Wall Scope Of Work |
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