A five-story office building is to be built on a site underlain by moderately uniform soils. Bedrock is at a depth of over 200 m. This building will be 50 m wide and 85 m long, and the foundations will be founded at a depth of 1 m below the ground surface. Determine the required number and depth of the exploratory borings.
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- A saturated clay encountered in a deep excavation is found to have a water content of 23.5%. Determine its porosity and (saturated) unit weight.arrow_forward12500 4 250 - 1100 250 38000 SECTION AI 550 SECTION A 1. FOUNDATION PLAN CIVL 2063 PROJECT NO. SCALE NTS DRAWING NO. B-1 2. SECTION A-A ESTIMATING CIVIL PROJECTSarrow_forwardSubject: foundation engineeringarrow_forward
- Please help me in answering the following practice questionsAt a site, it is planned that a circular grain silo will be constructed at the ground surface. The grain silo will be set on a rigid circular foundation that has a diameter of 6 meters. Assume that the silo will apply a concentric vertical load Q on top of the circular foundation and that the foundation will transfer this load to the top of the silty clay layer as a uniform vertical pressure q. The soil profile at this site is as follows (also shown in attached image): 9-m-deep silty clay layer underlain by bedrock Groundwater table located at a depth of 6 m from the horizontal ground surface, groundwater condition is hydrostatic. Silty clay layer Air-entry value (AEV) = 120 kPa Specific gravity GS = 2.72 Porosity n = 0.42 Average undrained shear strength su = 40 kPa Critical state friction angle Φ'C= 24 degrees (a) How can I compute pore-water pressure, total vertical stress, and effective vertical stress at point P…arrow_forwardCEN 333 Geotechnicalarrow_forward1. Using the boring log shown below determine the ultimate bearing capacity of a rectangular footing having a width of 4 feet and a length of 8 feet. Standard Penetration Tests were conducted at 5 foot intervals. The depth of footing will be 3 feet below the ground surface. Project Name: Johnson Hall Location: Birmingham, Alabama Boring No.: В-2 Date: January 4, 2019 Surface Elev.: 357 ft Depth (ft) Moisture N No. qu (tsf) Description 4 inches of top soil (%) Comments y = 120 pcf Reddish Brown silty Clay 14 1.2 LL = 43 PI = 20 $ = 7° 10 Dark Reddish Brown silty Clay 15 22 1.3 15 15 21 1.6 GNE Boring Terminated at 15 feet Boring Checked after 24 hours N - Standard Penetration Test Number LL – Liquid Limit qu – Unconfined Compression Strength $ - Angle of Internal Friction PI – Plastic Index GNE – Groundwater Not Encountered 20arrow_forward
- A 1.8 m square, 2 m deep and 1 m high footing supports a column load of 570 kN. It is supported on a clayey sand. There is no water present at the site. Use unit weight for the concrete 24 kN/m³. A dilatometer test run at the site has returned the following constrained modulus profile: Depth (m) M (MPa) 2 E 7.7 3 8.8 Calculate the settlement using Schmertman's method for the period after 50 years. Soil unit weight is 21 kN/m³. Use the correlation between elastic and constrained modulus of soil with Poisson's ration 0.33: (1 + v)(1-2v) (1 − v) 4 5 10.2 14.8 M 6 15.4arrow_forward1. Solve and show solution.arrow_forwardThe figure below shows a proposed foundation site, with 10 ft of sand overlying 20 ft of clay with consolidation properties shown. The clay is normally consolidated. Assume 1-D conditions.a. Compute the initial σ′v at the middle of the clay layer prior to excavation and constructionb. After excavation and during construction, the foundation area will be heavily loaded with the structure and equipment so that σ′v at the middle of the clay layer will be increased to 3900 psf. Determine the settlement that will occur under these conditionsc. After construction is completed, the equipment will be removed and the final σ′v at the middle of the clay layer will be 3200 psf. Compute the swell that occurs after the equipment is removedarrow_forward
- Principles of Geotechnical Engineering (MindTap C...Civil EngineeringISBN:9781305970939Author:Braja M. Das, Khaled SobhanPublisher:Cengage Learning