HomeworkLib
Question

An isolated footing of dimensions 1.5 ×1.5 is placed over a soil mass with a friction...

An isolated footing of dimensions 1.5 ×1.5 is placed over a soil mass with a friction angle of =35° and ′=20 / 2. The unit weight of soil, , is 16.5 / 3. Determine the allowable gross load on the foundation using a factor of safety (FS) of 3. Assume that the depth of the foundation is 1.5 m. Given: For φ=35°, the bearing capacity factors are: Nc=57.75, Nq=41.44, Nγ=45.51

engineering   Civil-Engineering   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

ca rive us It ww. e - 1.5815 Ne z 57.75 r = 16 kN/m3 2 or 0= 35° ca 20 kN/m² . Nq = 41.44 4 Nr = 45-51 J B = 1.5 for square f

0 0
Add a comment
Know the answer?
Add Answer to:
An isolated footing of dimensions 1.5 ×1.5 is placed over a soil mass with a friction...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • 3. The bearing capacity of shallow foundations (i.e. footings) depends on the soil shear strength (ie....

    3. The bearing capacity of shallow foundations (i.e. footings) depends on the soil shear strength (ie. ф and c). The ultimate bearing capacity (qultnei) of the soil is calculated using the following equation: Dr qult.net bearing capacity failure surface i. Frictional resistance along failure surface due to self-weight of soil below footing level footing level. Ny. No, and Ng are dimensionless bearing capacity factors that depend on the ii. Cohesive resistance along failure surface below footing level. iii. Frictional resistance...

  • A square footing with a width of 4 ft is subjected to a concentric load of...

    A square footing with a width of 4 ft is subjected to a concentric load of 200 kips. The bottom of the footing is located 6 ft below the ground surface. The ground water table is located at a depth of 8 ft below the ground surface. The given soil properties are γt of 115 pcf, γsat of 122 pcf, ϕ' of 25°, c' of 800 psf, Gs of 2.68 and wn of 15%. Determine the allowable bearing capacity using...

  • Problem 5-Bearing Capacity of Shallow Foundation (20 pts) For a square footing foundation, the following are...

    Problem 5-Bearing Capacity of Shallow Foundation (20 pts) For a square footing foundation, the following are given: B 3.0 m (width), D 1.2 m (depth). Y=20 kN/m3, = 32°, c' = 50 kPa, Use Terzaghi Equation and a factor of safety of 2.5 to determine the allowable bearing capacity and the maximum column load to cause bearing capacity failure. Assume that general shear failure occurs in soil. When Oar C S

  • a 39 in wide ,24 inch deep continuous footing supports a wall load of 12 kips/ft....

    a 39 in wide ,24 inch deep continuous footing supports a wall load of 12 kips/ft. this footing underlain by pure medium dense sand with D' = 31° and γ = 122 Lb/ft3. The ground water table is at a depth of 4 ft below the ground surface. Determine the allowable bearing capacity of this foundation using a factor of safety FS=2.5

  • 5. A square footing is 4 mx 4 m in plan. Determine the gross allowable load,...

    5. A square footing is 4 mx 4 m in plan. Determine the gross allowable load, Qall, that the square footing can carry. Use the general bearing capacity equation and a factor of safety F.-4). Given unit weight of soil y = 19 kN/m, c' = 0 kN/m, 6 - 35°, D-2 m. The load is applied vertically and the groundwater is very deep. Qall = ? B = 4 m

  • HW#10 Given the following column loading and footing information, determine the size of a mat foundation...

    HW#10 Given the following column loading and footing information, determine the size of a mat foundation shown below: I 15 Column Information: Column A: Live load = 40 kips, Dead load = 50 kips Column B: Live load = 80 kips, Dead load = 100 kips. Distance between two columns: 15 ft. W soil = 120 psf 24" I CA C. Footing information: Distance from column A to edge of footing: 1 ft. Allowable soil bearing capacity = 3000 psf...

  • 4. A 6' by 6' by 24" (thick) cast-in-place reinforced concrete footing will be placed within...

    4. A 6' by 6' by 24" (thick) cast-in-place reinforced concrete footing will be placed within a 20-foot thick surface layer of clayey sand. The footing will have an embedment depth of 3 feet. The soil has a cohesion of 200 psf, an internal friction angle of 28 degrees, and a moist unit weight of 116 pcf. The groundwater table is at a depth of 16 feet below grade, and there is no capillary rise. Perform a rigorous analysis to...

  • A rectangular foundation with dimensions of B=2 m and L=5 m is to be constructed on...

    A rectangular foundation with dimensions of B=2 m and L=5 m is to be constructed on a 6 m thick saturated layer of clay. Depth of foundation is 1 m and the undrained strength parameters of clay are ?? = 130 ??? and ?? = 0. The ground water table (GWT) is 1 m below the ground surface and unit weight of clay can be assumed as 19 ??/?3 above and below GWT. a) For a factor of safety of...

  • Part-I: OPEN BOOK Problem 1 (30 points). For the isolated square footing shown below, assume that the combined weight of soil and concrete above the base of the footing is equal to 120 pcf. Assum...

    Part-I: OPEN BOOK Problem 1 (30 points). For the isolated square footing shown below, assume that the combined weight of soil and concrete above the base of the footing is equal to 120 pcf. Assume fc-3000 psf and column size of 18in. x 18 in. Determine the followings: a) If the footing size of 10ft. x10ftx 2ft. is adequate based on allowable soil-bearing capacity qa 6,000 psf b) If the footing 10ft. x10ft.x 2ft. is adequate for shear e) Calculate...

  • A 100,000 lb load has to be carried by a concrete square foundation placed 3 ft...

    A 100,000 lb load has to be carried by a concrete square foundation placed 3 ft below the surface of a saturated sandy soil having the following properties: γt = 120 pcf E = 2x105 psf φ' = 30deg ν = 0.25 c' = 0 What footing width will be required for a factor of safety with respect to the ultimate bearing capacity of 3.0, and for a maximum settlement of 1". The water table is at the ground surface.

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT