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Structural Analysis
6th Edition
ISBN: 9781337630931
Author: KASSIMALI, Aslam.
Publisher: Cengage,
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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 2.0 m wide continuous foundation is placed at 1.5 m depth
in a saturated clay where c, = 40 kN/m² and y = 18.5 kN/m³.
At 2.0 m below the ground level, this clay layer is underlain
by a stiffer clay where c, = 60 kN/m² and y = 19.0 kN/m³.
7.6
What would be the maximum wall load allowed with FS = 3?
Use Eq. (7.11).
7.7
Redo Problem 7.6 using Vesic's (1975) solution [Eq. (7.12)].](https://content.bartleby.com/qna-images/question/154acf96-b9e3-4000-9cf2-dd19cb646b20/874532c8-153b-45f5-bba8-b16afac8b68b/3m1g6x7_thumbnail.png)
Transcribed Image Text:A 2.0 m wide continuous foundation is placed at 1.5 m depth
in a saturated clay where c, = 40 kN/m² and y = 18.5 kN/m³.
At 2.0 m below the ground level, this clay layer is underlain
by a stiffer clay where c, = 60 kN/m² and y = 19.0 kN/m³.
7.6
What would be the maximum wall load allowed with FS = 3?
Use Eq. (7.11).
7.7
Redo Problem 7.6 using Vesic's (1975) solution [Eq. (7.12)].
![7.8
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/m³, o' = 38°
Lower clay layer: unit weight = 19.0 kN/m³, undrained
shear strength = 25 kN/m²
Determine the maximum wall load that can be allowed on
the foundation with FS = 3.
A 3 m thick clay layer (c, = 60 kN/m² and y = 19.0 kN/m³)
is underlain by a weaker clay (cu = 30 kN/m² and
y = 18.0 kN/m³) to a large depth. A 2.0 m wide square
7.9
foundation is placed at 1.5 m depth below the ground level.
Determine the maximum column load that can be allowed on
the foundation with FS = 3.](https://content.bartleby.com/qna-images/question/154acf96-b9e3-4000-9cf2-dd19cb646b20/874532c8-153b-45f5-bba8-b16afac8b68b/7phou89_thumbnail.png)
Transcribed Image Text:7.8
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/m³, o' = 38°
Lower clay layer: unit weight = 19.0 kN/m³, undrained
shear strength = 25 kN/m²
Determine the maximum wall load that can be allowed on
the foundation with FS = 3.
A 3 m thick clay layer (c, = 60 kN/m² and y = 19.0 kN/m³)
is underlain by a weaker clay (cu = 30 kN/m² and
y = 18.0 kN/m³) to a large depth. A 2.0 m wide square
7.9
foundation is placed at 1.5 m depth below the ground level.
Determine the maximum column load that can be allowed on
the foundation with FS = 3.
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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
- Estimate the ultimate consolidation settlement under the centerline of a 25 x 25 meter mat foundation. The mat is 1.5 meter thick reinforced concrete (ϒconcrete = 23.6 kN / m3), and the average stress on the surface of the slab is 125 kPa. The soil profile is shown in the figure below. Lab testing on samples of the clay showed that the clay is normally consolidated and that Cc = 0.40, Cr = 0.03, and eo = 1.13. Neglect any settlements due to the sand layer. Divide the clay layer into four thinner layers of thickness 2.0, 2.0, 3.0, and 3.0 meters.arrow_forwardA 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?arrow_forward9. Consider Figure FE 3. Compute the difference in the primary consolidation settlement. Further, if foundation B is to be loaded with an additional 150 kN, suggest an increase in dimension for said foundation if a differential settlement of 20 mm is not to be exceeded. You may use the equation for primary consolidation settlement of HomvAov. 780 kN 780 kN Foundation A Foundation B 1.5 m x 1.5 m 1.5 m x 1.5 m Sand 1.4 3 m 2.8 m 1.2 m Clay, m = 0.7 m2/MN Gravel Figure FE 3-Borrowed from Soil Mechanics and Foundations, Muni Budhuarrow_forward
- The 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_forward4. A flexible foundation is shown below, determine the immediate settlement below the center of the foundation. Assume the thickness of the soil below the foundation is 20 meters. Following is the variation of the modulus of the soil below the foundation. Es (kN/m²) Depth below the foundation(m) 0-4 4-8 8-20 >20 1.2m 10000 8000 12000 ∞ 90 = BXL = 2m x 2m Us = 0.3 150kPaarrow_forwardPlease answer question 3b Question 3barrow_forward
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