Geosynthetics June/July 2019 - 56

FINAL INSPECTION

The Los Angeles Museum of the
Holocaust. Photograph courtesy
Belzberg Architects

PROJECT HIGHLIGHTS
LOS ANGELES MUSEUM
OF THE HOLOCAUST
OWNER

City of Los Angeles Department
of Recreation and Parks
LOCATION

Los Angeles, Calif.
PRODUCT/SYSTEM

Tensar TriAx 160 Geogrid/
Dimension System
DESIGN ENGINEER

Irvine Geotechnical Inc.
INSTALLATION CONTRACTOR

Winter-Schram Associates
MATERIALS SUPPLIER

CONTECH Construction
Products Inc.
56

Geosynthetics | June July 2019

Los Angeles Museum of the Holocaust
foundation improvement

T

he Los Angeles Museum of the Holocaust needed a foundation improvement solution for
its new and innovative earth-sheltered facility. Jon Irvine, the project engineer, of Irvine
Geotechnical Inc., suggested using a mechanically stabilized earth (MSE) mattress as an affordable alternative to overexcavation and replacement.
Schedule, performance and cost were significant project drivers, but the overriding concern
was the potential effects of total and differential settlement caused by subsurface conditions
or seismic events. Any foundation approach would have to meet the project's compaction
requirement while also minimizing differential settlement.
A subsurface soil investigation revealed silty sand and clay soft soils (R value = 5).
Irvine Geotechnical developed a rigid foundation design using one layer of Tensar TriAx
160 Geogrid from Tensar International Corp. The MSE design provided a low-cost solution that
could be installed quickly while delivering performance that was equivalent to overexcavation.
The installation crew began the installation by undercutting the foundation to a maximum
depth of 12 inches (305 mm). Next, they leveled and rolled the subgrade and covered it with
overlapping layers of geogrid followed by a 12-inch (305-mm) lift of crushed aggregate compacted to meet the specified density.
"The owner was looking for an equivalent solution that would be less time consuming and
costly to install," says Lars Nelson, Pacific South regional manager for Tensar. "The MSE design
satisfied those requirements despite challenging soil conditions." G



Geosynthetics June/July 2019

Table of Contents for the Digital Edition of Geosynthetics June/July 2019

Geosynthetics June/July 2019 - Cover1
Geosynthetics June/July 2019 - Cover2
Geosynthetics June/July 2019 - 1
Geosynthetics June/July 2019 - 2
Geosynthetics June/July 2019 - 3
Geosynthetics June/July 2019 - 4
Geosynthetics June/July 2019 - 5
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Geosynthetics June/July 2019 - Cover3
Geosynthetics June/July 2019 - Cover4
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