A 1m deep foundation is placed on a soil of unit weight 20 kN/m3 and ultimate bearing capacity of 300 kN/m2. Determine the net safe bearing capacity for a factor of safety of 2.5

Answered: Image /qna-images/answer/4c55a2c4-b67f-432f-810f-adfea58b31e4.jpg

Answered: 1m deep foundation is placed on a soil…

Engineering

Civil Engineering

1m deep foundation is placed on a soil of unit weight 20 kN/m3 and ultimate bearing capacity of 300

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter20: Load And Resistance Factor Design

Section: Chapter Questions

Problem 20.2P

See similar textbooks

Related questions

Q: A Im deep foundation is placed on a soil of unit weight 20 kN/m³ and ultimate bearing capacity of…

A: Given: Foundation depth, D = 1 m Unit weight of soil, γ = 20 kN/m3 Ultimate bearing capacity, qu =…

Q: A 2.0m wide continuous foundation carries a wall load of 350 kN/m in a clayey soil where y 19,0…

A: Given:- Width = 2.0 m Wall load = 350kN/m γ=19kN/mc'=5kN/m2'=230Fundation depth = 1.5mTo find:-FOS…

Q: Problem 1: A 2 m wide continuous foundation is placed at 1 m depth within a 1.5 m thick sand layer…

Q: Question attached

A: The maximum capacity of the pile depends on the superstructure load and the subgrade soil bearing…

Q: The applied load on a shallow square foundation makes an angle of 20 degrees with the vertical.…

A: Given data- Shallow square foundation with 20 degrees with vertical. B = 5 ft, Df = 3 ft, y = 115…

Q: The applied load on a shallow square foundation makes an angle of 15° with the vertical. Given: B=…

Q: Determine the maximum column load that can be applied on a 1.5 m X 1.5 m square foundation placed at…

A: Given:- Dimensions of the square foundation = 1.5 m×1.5 m Depth of the soil = 1 m γ=19.0 kN/m3 c' =…

Q: of safety is 3. Using Terzaghi's Bearing capacity equation, determine the design load on the…

A: Give data A=1.5m×1.5m Friction angle, ϕ=28o C=15.2kPa unit weight=19.8kN/m3

Q: A 30 x 24 ft mat foundation is to be placed at 9 ft depth in a saturated clay where Cu= 1200 Ib/ft²…

A: Given: The size of the foundation is 30 x 24 ft. The depth is 9 ft. The value of cohesion Cu is 1200…

Q: A 2m x 3m spread foundation placed at a depth of 2m carries a vertical load of 3000 kN and a moment…

A: Question is based on spread foundation over a soil .Dimensions of foundation,vertical load and…

Q: A square foundation is placed at a depth of 1.5 m within a sandy clay where c'=14k/m2 , phi'=23 and…

A: Compaction is the process in which soil gets distributed properly and its quantity gets pressured by…

Q: Question attached

A: Given:- D=1mcolumn load =1500kNc'=15kN/m2∅'=24γ=18.5kN/m3To find:-B

Q: A continuous foundation is required in a soil where c' 19.0 kN/m³. The depth of the footing will be…

A: Procedure: First, find the load and ultimate capacity of soil using that find the design load and…

Q: The average corrected in the effective zone for a square footing(1m x 1m) located at a depth of 2m.…

A: Let us analyse the question in step 2.

Q: Redo Problem 7.6 using Vesic's (1975) solution [Eq. (7.12)]. 7.6 A 2.0 m wide continuous foundation…

A: Given : A continuous footing in a saturated clay Width = 2.0 m Depth…

Q: A square foundation of 5 m x 5 m is to be founded at a depth of 3 m in a deep layer of sand of unit…

A: (i) For ϕ=25° Refer the table for Terzaghi bearing capacity factors, we get Nc=25.1Nq=12.7Nγ=9.7

Q: A 30 x 24 ft mat foundation is to be placed at 9 ft depth in a saturated clay where Cu = 1200 lb/ft2…

A: Given: The size of the foundation is 30 x 24 ft. The depth is 9 ft. The value of cohesion is 1200…

Q: Given the following foundation configuration find the change in stress 6ft below grade at points 1…

A: given load is a concentrated load convert it into distributed pressure q=load area=4503×8+7×8=5.625…

Q: A 30x24 ft mat foundation is to be placed at9 ft depth in a saturated clay where cu=1200 lb/ft2 and…

A: Given data: Shallow Mat foundation = (30 x 24) m Depth of foundation = 9 ft. Cohesion (C) = 1200…

Q: Question Attached

A: GIVEN DATA;- SIZE OF MAT FOUNDATION L=45 FT B=30 FT D=6.5 FT COHESION OF CLAY=1950 LB/FT2

Q: Question attached

A: Solution: (a) Mayerhof Method: Gross qult=cNcqAssume the stability numberNs=0Since…

Q: Given the following foundation configuration find the change in stress 6ft below grade at points 1…

A: Solution

Q: Determine the net ultimate bearing capacity of a mat foundation measuring 45 ft x 30 ft on saturated…

A: Raft foundation dimension = 45ft × 30 ftUndrained cohesion (Cu) = 1950 psf = 1950 lb/ft2Angle of…

Q: A square foundation with a depth of 1.5 m will carry a load of 3000 kN. Soil has a property index of…

Q: A column foundation is 3m x 2m in plan. Given: Df= 1.5 m, ’=25, c=70 kN/m2 . (a) Using Terzaghi’s…

A: NOTE - : Hi! Thank you for the question As per the honor code, We’ll answer the first question since…

Q: Refer to Figure 5.13. For a continuous foundation constructed over a granular trench, the following…

A: Solution Given Data B = 1 m, W = 1.5 m, Df = 1 mΦ'1 = 40º, c'1 = 0, γ1 = 18 kN/m3 Φ2 = 0, c2 = cu(2)…

Q: For an eccentrically loaded continuous foundation on sand, given B = 1.8 m, Df = 0.9 m, e/B = 0.12…

A: The given data is shown below:

Q: The applied load on a shallow square foundation makes an angle of 20° with the vertical. Given: B= 5…

A: Hi there!! you haven't provided any specific equation to solve this problem. So, I am using general…

Q: A square column foundation has to carry a gross allowable load of 1805 kN ( FS = 3). Given: D f =…

A: Given: The load on the column is 1805 kN. The factor of safety is 3. The depth of the footing is 1.4…

Q: 2 metre wide continuous Foundation carries a will load of 350 kilo Newton per metre square in a…

A: Solution Given Data ϕ=230 q=350 KN/m2 B=2 m

Q: What is the design criteria for shallow foundation? b. Discuss the three types of bearing capacity…

A: ans A shallow foundations have to withstand the applied load without being failed that is bearing…

Q: The applied load on a shallow square foundation makes an angle of 15° with the vertical. Given: B =…

A: It is required to find the gross allowable load.

Q: A 30*40 ft mat foundation is to be placed at 9ft depth in a saturated clay where cu=1200 lb/ft2 and…

A: Given: The size of the foundation is 30 x 24 ft. The depth is 9 ft. The value of cohesion Cu is 1200…

Q: (b) The bearing capacity of shallow foundation depends on several factors, list any five of them

A: Foundation is the substructure elements that are in direct contact with the ground and transmit,…

Q: calculate the stress increase at 4 meters below the center of a 2 meter2 foundation imposing 293…

Q: A 30 x 24 ft mat foundation is to be placed at 9 ft depth in a saturated clay where Cu = 1200…

A: Given: The size of the foundation is 30 x 24 ft. The depth is 9 ft. The value of cohesion Cu is 1200…

Q: 3.3 A continuous foundation having a width of 1.5 m is placed at 1.0 m depth within a loose sand…

A: Given data Continous footing Width Depth Angle of internal friction Unit weight

Q: It is proposed to build an eight- story building with a footprint of 15 m x 20 m, resting on a mat…

A: Calculate the area of foundation: A=L×B=20 x 15=300 m2 Calculate total load of structure: Total load…

Q: A mat foundation on saturated clay has plan view dimensions of 20 m x 30 m. Given that the gross…

A: The depth of fully compensated foundation is given by, Df=QAγ where Q is the total load = 60 MN…

Q: A 2 m wide continuous foundation is placed at 1 m depth within a 1.5 m thick sand layer (Φ’ = 30°, γ…

A: Given data, B= 2m D= 1m t= 1.5 m Φ’ = 30° γ = 18 kN/m3 F= 4

Q: b) A 3.X m x 3.X m square foundation is to be founded at a depth of 1.5 m below ground level in…

A: To Estimate Allowable load : Given Depth Df = 3.2m Width B = 3.2m Permissible…

Q: A 2.0 m wide continuous foundation is placed at 1.5 m depth in a saturated clay where cu = 40 kN/m2…

A: Given, D =1.5 m B =2 m cu = 40 kN/m2 and γ = 17 kN/m3 and at 2 m below groynd level cu = 60 kN/m2…

Q: A square column foundation has to carry a gross allowable load of 1805 kN (FS = 3). Given: Df = 1.5…

A: Note - : We’ll answer the first question since the exact one wasn’t specified. Please submit a new…

Q: A 2.0 m wide continuous foundation carries a wall load of 350 kN/m in a clayey soil where y = 5.0…

Q: It is proposed to place a 9ft x 9ft foundation at 6ft depth in a sandy soil, where the average N60…

A: From section 9.6 we have,

Q: A square shallow foundation has to carry a gross allowable total mass of 15,290 kg. The depth of the…

A: Total Mass to bear from soil (M) = 15,290 kg Depth of the foundation (Df) = 0.7 m Inclination of…

Concept explainers

Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.

Question

A 1m deep foundation is placed on a soil of unit weight 20 kN/m³ and ultimate bearing capacity of 300 kN/m². Determine the net safe bearing capacity for a factor of safety of 2.5

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

A 2.0 m wide continuous foundation carries a wall load of 350 kN/m in a clayey soil where = 19.0 kN/m3, c = 5.0 kN/m2, and = 23. The foundation depth is 1.5 m. Determine the factor of safety of this foundation using Eq. (6.28).
A 2.0 m wide continuous foundation carries a wall load of 350 kN/m in a clayey soil where = 19.0 kN/m3, c = 5 kN/m2 and =23. The foundation depth is 1.5 m. Determine the factor of safety of this foundation.
A square column foundation has to carry a gross allowable load of 1805 kN (FS = 3). Given: Df = 1.5 m, =15.9 kN/m3, = 34, and c = 0. Use Terzaghis equation to determine the size of the foundation (B). Assume general shear failure.
For an eccentrically loaded continuous foundation on sand, given B = 1.8 m, Df = 0.9 m, e/B = 0.12 (one-way eccentricity), γ = 16 kN/m3, and Φ' = 35°. Using the reduction factor method [Eq. (4.60)], estimate the ultimate load per unit length of the foundation.
A rectangular footing 6 x 3 m carries a uniform pressure of 300 kN/m 2 on the surface of a soil mass. Determine the vertical stress at a depth of 4.5 m below the surface on the center line 1.0 m inside the long edge of the foundation?
A 2 m wide continuous foundation is placed at 1 m depth within a 1.5 m thick sand layer that is underlain by a weaker clay layer. The soil properties are as follows: Upper sand layer: unit weight = 18.0 kN/m2, d' = 38° Lower clay layer: unit weight = 19.0 kN/m, undrained shear strength = 25 kN/m2 Determine the maximum wall load that can be allowed on the foundation with FS = 3.
A circular foundation of 1.5 m diameter is constructed in a sand deposit. Given: Df =1 5 m, soil friction angle Ø =35o and soil unit weight γ =17 4kN/m3. Estimate the ultimate uplift capacity of the foundation.
Refer to Figure 5.2. A square foundation measuring 1.5 m x 1.5 m is supported by a saturated clay layer of limited depth underlain by a rock layer. Given that Df = 1 m, H = 0.7 m, cu = 115 kN/m2, and γ = 18.5 kN/m3, estimate the ultimate bearing capacity of the foundation.
A 2m x 3m spread foundation placed at a depth of 2m carries a vertical load of 3000 kN and a moment of 300 kN.m. Determine the factor of safety.
Determine the net ultimate bearing capacity of a mat foundation measuring 20m x 9m on a saturated clay with = 85 kN/, =0,. sand with the allowable settlement is 50mm, and .
A continuous foundation with a width of 1 m is located on a slope made of clay soil. Refer to Figure 5.19 and let Df = 1 m, H = 4 m, b = 2 m, γ = 16.8 kN/m3, c = cu = 68 kN/m2, Φ= 0, and β = 60°.a. Determine the allowable bearing capacity of the foundation. Let FS = 3.b. Plot a graph of the ultimate bearing capacity qu if b is changed from 0 to 6 m.
A mat foundation on saturated clay has plan view dimensions of 20 m x 30 m. Given that the gross allowable load is 60 MN, undrained shear strength of the clay is 60 kPa, and its unit weight is 18 kN/m3 find the depth of the fully compensated foundation. What depth of the mat foundation corresponds to the net factor of safety of 5? What is the gross factor of safety for this depth?