A silty/clayey gravel stratum, SPT sampling, 25-35 ft depth with water table at 18 feet. Loose to medium dense. SPT samples yield fragments of larger gravels which, coupled with experience in the area, indicates to us that there is a significant percentage of cobbles to gravels. Liquefaction...
A building is to inset into a hillside to a depth of about 18 feet. Setbacks do not a allow a sloped excavation so a soil nail wall is being constructed for shoring. Our contractor has suggested to the owner that constructing the soil nail wall as a permanent part of the structural system will...
I'm providing geotechnical recommendations for a 72 foot diameter water tank 20 foot height. Site at ridge top. About 3/4 of the tank footprint will bear on moderately to slightly fractured sandstone bedrock, expected settlement negligible per borings to 50 plus feet-the rock just gets more...
I'm in the the pile design phase for an integral abutment single span (130') bridge. LRFD per AASHTO. The subsurface exploration has been completed. We have slightly to moderately overconsolidated alluvial or lacustrine clays to 45 feet underlain by very dense sand and weathered shale. The clay...
My firm is designing a sewer line and lift station for which I did the geotechnical investigation. The lift station will require an excavation approximately 24 feet deep, 60 feet by 40 feet. The project is outside of the area of my professional experience, i.e. dewatering and shoring in low...
