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A spread footing supported on a sandy soil has been designed using ASD to support a certain column load with a factor of safety of 2.5 against a bearing capacity failure. However, there is some uncertainty in both the column load, P, and the friction angle,

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- 2 m 3m 75 EV 1 m A The footing plan is shown loaded uniformly in a rectangular area. What is the value of the increase of stress of the second or loaded area (Aσ₂) to be subtracted?
*arrow_forward*(b) A plate load test was carried out on a ground having a uniform sand stratum up to sufficient depth. The size of the plate was 40 cm x 40 cm Load (kN) 5 10 20 28 38 50 56 Settlement 0.8 1.3 2.25 3.6 6 8.25 11.5 (mm) Plot the load settlement curve. Also determine the bearing capacíty and load that can be taken by a column footing of size 2m x 2m in this soil for an allowable settlement of 25 mm*arrow_forward*2. Compute the following: Compute the following: (4) a. Effective stress before loading. b. Induced stress and effective stress after loading at the edge of the footing c. Compute effective stress if ground water table was at the same level as ground level. d. Calculate new Induced stress and effective stress after loading at the edge of the footing. 10° 10 30' 30⁰ Width = 10ft, q = 2000 psf Sand ym= 110 pcf ysat = 125 pcf ** Clay ysat = 100 pcf Gravel ysat = 130 pcf Pt. B Pt. C Pt. A O t*arrow_forward* - The following results were obtained from CU tests on a clay soil that is the foundation material for an embankment. 03 (kPa) 300 400 600 0₁-03 (kPa) 331 420 487 Au (kPa) 111 160 322 (a) Determine the total and effective principal stresses for all three tests (You may summarize them in a table). (b) Recommend the shear strength parameters to be used for short-term and long-term analyses. The maximum confining pressure (cell pressure) at the depth of interest is 300 kPa. (Note: the clay is a normally consolidated one).
*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*A plate-load test was conducted on-site in Bataan in which the soil was found to be clay. PLT was conducted using a circular plate having a diameter of 800 mm. The ultimate load for the test was found to be 520 kN/m2. What should be the maximum allowable load of a footing having a diameter of 1.5 m? Use an FS of 5. O 183.78 kN O 918.92 kN O 1828.13 kN O 365.63 kN O 261.38 kN O NOT IN THE CHOICES O 52.28 kN*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*2- Determine the stress increase below the center of the footing using both theoretical and approximate methods at the top, middle and bottom of the clay layer. In addition, determine the average stress increase for the clay layer. Dimensions in Heights in m Unit weights in kN/m3 kN m P2 H1 H2 H3 BL Hw 2.5 Yoati 18.0 19.0 3.0 3.0 2.0 16.0 2 3 1174 Load - 0 Hw H1 H2 H3 OSand Clay (hoemally conactiduted)*arrow_forward*A column load of 72 kips is applied to the 6 ft by 8 ft rectangular concrete footing shown below. The groundwater table is 2 ft deep. The soil profile and properties are shown below. The required minimum factor of safety against bearing capacity failure is 2.5. Is the current foundation design acceptable? Use Vesic’s bearing capacity formula 1a. Intermediate calculation: compute the ultimate bearing capacity, qult, in units of psf. 1b. Intermediate calculation: compute the applied bearing pressure, q, in units of psf. 1c. Final calculation: compute the factor of safety (FS) against bearing capacity failure.*arrow_forward* - Pls give me correct solution- In a plate load test on a soil, at a particular magnitude of the settlement, it was observed that the bearing pressure beneath the footing is 100 kN/m². The perimeter shear is 25 kN/m². Find the load capacity of a 2 m square footing at the same settlement.
*arrow_forward*For a rectangular footing 4 ft x 8 ft, 100 kips of load is being applied. Compute stress increase 10 ft below the footing using 2:1 method in psi.*arrow_forward*Tthe footing shown in a figure below is subjected to a uniform load of 300KPa. Calculate the vertical stress component at 2m below point A. Using the concept of superposition of concentrated loads*arrow_forward*

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