lambert st. louis INTERNATIONAL AIRPORT (stl)
CONCOURSE C BUILDING ADDITION AND IMPROVEMENTS
The two types of construction for this project were “bump-outs” to the existing building and the addition of an interior mezzanine. TSi completed a subsurface exploration consisting of four soil test borings drilled to 50 feet in depth, and 5 to 10 feet of NX rock coring was performed at each boring location. The laboratory testing consisted of soil moisture content, Atterberg limits, consolidation, and unconsolidated-undrained triaxial. The geotechnical report focused on subsurface conditions, including material types to be expected at existing and proposed grades and foundation recommendations, including recommended bearing pressure.
CONSTRUCTION MATERIALS QUALITY ASSURANCE, AIRPORT EXPANSION
TSi was part of a team of consultants providing quality assurance (QA) testing for 14 million cubic yards of soil fill placed for the new runway as a part of the airport expansion. TSi provided all soils-related laboratory testing and more than 300 modified Proctor compaction tests were completed. TSi was responsible for all field inspection and testing related to soil for general fill areas, trench backfill, and pavement subgrade and aggregate base. TSi also provided consultation to the QA Manager for the construction management team and assisted in resolving disagreements with the contractors. Field investigation work for all projects were performed at night in accordance with Lambert security requirements.
RUNWAY 12L/30R AND TAXIWAYS A, D AND S IMPROVEMENTS
TSi was contracted to provide geotechnical services for the design of improvements to Runway 12L/30R and Taxiways A, D and S. TSi’s services included more than 200 4- to 8-inch diameter core samples of the pavements. At selected core locations, the underlying soil was sampled to a depth of 15 feet using a standard penetration test and Shelby tube samplers. TSi performed laboratory testing to characterize the subsurface conditions, and examined and tested pavement core samples for tension bond strength.