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Develop a spread sheet to compute allowable total vertical column loads using the ASD method and factored ultimate vertical column loads using LRFD. The spreadsheet should consider only vertical loads on a square or continuous footing bearing on single uniform soil. It should allow the input of footing width, depth, water table depth, soil strength parameters, a factor of safety for ASD, and a geotechnical resistance factor for LRFD. It should compute the bearing capacity based on both Terzaghi’s and Vesic "’s methods.

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# Chapter 7 Solutions

Foundation Design: Principles and Practices (3rd Edition)

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- a square footing is to be constructed on a uniform thick deposit of clay with a unconfined compressive strength of 3kips/ft2. the footing will be located 5 ft below the ground surface and is designed to carry a total load of 300 kips. the unit weight of the supporting soil is 128lb/ft3. no groundwater was encountered during soil exploration. considering general shear, determine the square footing dimension, using a factor of safety of 3
*arrow_forward*Redo Problem 16.13 with the following data: gross allowable load = 184,000 lb, = 121 lb/ft3, c = 0, =26, Df = 6.5 ft., and required factor of safety = 2.5. 16.13 A square footing (B B) must carry a gross allowable load of 1160 kN. The base of the footing is to be located at a depth of 2 m below the ground surface. If the required factor of safety is 4.5, determine the size of the footing. Use Terzaghis bearing capacity factors and assume general shear failure of soil. Given: = 17 kN/m3, c = 48 kN/m2, =31.*arrow_forward*The thickness and reinforcement of a spread footing are governed by structuralconcerns. Structural design is governed by the LRFD method, which means theseanalyses are based on the factored loads.*arrow_forward* - Prepare a spreadsheet to compute settlement of square footings using the e@log@p method. Thespreadsheet should allow input of: footing width, footing depth, groundwater depth, columnservice load, footing rigidity factor and Cr/(1 + e0), Cr/(1 + e0), sm′, and g as function ofdepth. Check your spreadsheet using a hand solution
*arrow_forward*A strip footing carries a load 14506 lbs per foot of length. The footing has a width of 2.3 ft. Determine the increase in vertical stress directly below the center of the footing at a depth of 0.8 ft. Provide your answer in psf, to 2 decimal place. Do not include units in your response.*arrow_forward*Develop a spread sheet to compute allowable total vertical column loads using the ASD methodand factored ultimate vertical column loads using LRFD. The spreadsheet should consider onlyvertical loads on a square or continuous footing bearing on single uniform soil. It should allowthe input of footing width, depth, water table depth, soil strength parameters, a factor of safetyfor ASD, and a geotechnical resistance factor for LRFD. It should compute the bearing capacitybased on both Terzaghi’s and Vesic ́’s methods.*arrow_forward* - Question 3. A strip footing is to be used in a clay soil in which the imposed load is 1 MN/m length. The clay layer is 7.0 m thick and overlies a stiff, fractured siltstone. The water table lies at a depth of 2.0 m. a. Determine the footing width based on the long-term allowable bearing capacity (calculated according to the method in the Canadian Foundation Engineering Manual; neglect depth factors) using a factor of safety of 3.0 for a burial depth of 2.0 m. The material properties of the clay are: c' = 15 E = 42 MPa o' = 27° y= 18.5 kN/m³ Ce = 0.40 e, = 0.90 C, = 9.3 x 104m²/day Cu = 25 b. Why would bearing capacity failure likely not govern the design of this structure?
*arrow_forward*Discuss DESIGN OF SPREAD FOOTINGS AGAINST BEARING CAPACITY FAILURE*arrow_forward*Define Load-Settlement Response of Footing on Sand ?*arrow_forward* - Section 304 of the NSCP provides tabulated values of allowable foundation pressures to different types of foundation materials (NSCP Table 304-1). The tabulated values are assumed for footings having a minimum width of 300mm and a minimum depth of 300mm into natural grade. These values may be increased by 20% for each additional 300 mm of width and/or depth to a maximum of 3 times designated value. If the soil is identified to be sandy gravel and have a tabulated value of 100kPa, calculate the maximum allowable soil pressure which may be used for a 1.40m x 1.80m footing with the bottom of the footing located 1.20m below the natural grade.
*arrow_forward*A rectangular combined footing 8 ft * 20 ft is founded at a depth of 6 ft on a normally con-solidated sand deposit. The sand deposit is approximately 28 ft thick and overlies sandstone. CPT tests indicate the sand is relatively uniform below the proposed footing depth and theaverage tip resistance is 50 tsf. The total service load carried by the combined footing is480 k. Estimate the settlement of this footing.*arrow_forward*Figure Q1 presents a concrete (γc=23kN/m3) circular footing founded on a saturated silty clay profile. Your input depends on the ultimate (j) and the penultimate (i) digit of your ID number as described by the formulae in Table Q1. Calculate the Safety Factor against bearing capacity failure under short-term loading conditions (use the Meyerhof methodology) Note : My ID Number is 9477287*arrow_forward*

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- Principles of Geotechnical Engineering (MindTap C...Civil EngineeringISBN:9781305970939Author:Braja M. Das, Khaled SobhanPublisher:Cengage LearningPrinciples of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781337705028Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning