Abstract:
A large site development was planned in an area known as Tremley Point in the City of
Linden, Union County, New Jersey. The site was approximately 241 acres and was previously occupied by multiple structures associated with a former chemical plant. The vision for the site was to create eight large warehouses, ranging in area from 332, 500 to 840, 000 sf, and create access roads to and within the site itself. The subsurface conditions, which contained, among other things clay, peat, municipal solid waste, and partially dredged material, required the use of ground improvement or deep foundations. During the development of the project, multiple types of ground improvement were used to minimize long-term settlement to meet the project criteria of 2 inches. The amount of cut or fill required to reach finished floor elevation of the warehouses varied greatly across the site due to the variable existing grades and existing stockpiles of soil.
Multiple types of ground improvement were used depending on the soil, grading, and loading at each of the buildings. Surcharging, deep dynamic compaction, and rigid inclusions were all used on site and in some areas, multiple techniques were used within a single warehouse footprint. Additionally, a bridge spanning over existing railroad tracks was constructed to provide access to the massive site. The roadway embankments adjacent to the bridge were also supported on rigid inclusions. This roadway required up to 26 feet of fill to be placed on marshland.
This paper will give an overview of the support provided at the site, what variables controlled the design for the different warehouses (soils, fill heights, previous surcharge, etc.) and a summary of the load test data and discussion of how the load test data was used to optimize the RI embedment into the bearing stratum. Over 40, 000 RIs were installed and 8 static load tests were performed over the course of 4 years on this site.