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A ten-story steel-frame office building with a 200 ft x 200 ft footprint is to be built on a site underlain by alluvial sands and silts. These soils are fairly uniform and probably have good engineering properties. The building will have one 12 ft deep basement and will probably be supported on either a mat foundation located 5 ft below the bottom of the basement, or a deep foundation extending about 60 ft below the bottom of the basement. The groundwater table is about 30 ft below the ground surface and bedrock is several hundred feet below the ground surface. There are no accessibility problems at this site.
i) How many exploratory borings will be required, and to what depth should they be drilled?
ii) What type of drilling equipment would you recommend for this project?
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- Problem #2: Design a (One Way Slab) slab whose clear length is 20 ft x 12 ft which is subjected to a live distributed load of 150 psf.arrow_forwardIn what ways do the principles of geotechnical engineering contribute to our understanding of soil-structure interaction and its implications for foundation design?arrow_forwardYou are planning to build a three story above ground building with a basement parking garage below ground. The bottom of your slab/foundation will be 17 ft below existing grade. You plan to keep the ground water level in the excavation 3.0 ft below the bottom of the foundation for approximately 3 months. The water table is 11 ft below existing grade. The soil is uniform medium sand down to a depth of approximately 50 ft. The soil below 50 ft is an impervious clay. Your excavation will be 320 ft x 150 ft. You have determined that a 4 ft wide x 3 ft deep sump around the perimeter of your excavation will provide adequate dewatering capacity. Based on test wells on site, you determined that the medium sand has a k value of .058 ft/min and that the D factor is 50 ft. a. Label D, H, and ht on the given diagramb. Calculate the flow rate, q c. Calculate the total volume of water that will need to be pumped in gallons per minute (GPM)arrow_forward
- Determine the maximum aggregate size (MAS) for an 18" wide foundation wall that has two layers of rebars. It is comprised of number 4 rebar at 6" on center in the horizontal direction and number 6 rebar spaced at 2" on center in the vertical direction. It has 1.5" clear cover on the side of the wallarrow_forwardWhen does the no-support condition exists in quicksand?arrow_forwardExplain the Sequence of foundation loading being transferred onto soil particles (the soil skeleton) by the consolidation process.arrow_forward
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