A proposed office building will include a 10 ft x10 ft square, 3 ft deep (the footing height is also 3 feet) spread footing. The normally consolidated clay has the following engineering properties: Ydry = 115.0 pcf $'=24° c'=90.0 psf Cc/(1+eo) = 0.15 The soil stratum extends to a great depth, and the ground water table is 50 ft below the ground surface. Using the classical piece-wise log-linear method, estimate the total settlement of this footing considering only the allowable bearing pressures using ASD approach. The unit weight of concrete is 150 pcf. State any assumptions made.

A proposed office building will include a 10 ft x10 ft square, 3 ft deep (the footing height is also 3 feet) spread footing. The normally consolidated clay has the following engineering properties: Ydry = 115.0 pcf $'=24° c'=90.0 psf Cc/(1+eo) = 0.15 The soil stratum extends to a great depth, and the ground water table is 50 ft below the ground surface. Using the classical piece-wise log-linear method, estimate the total settlement of this footing considering only the allowable bearing pressures using ASD approach. The unit weight of concrete is 150 pcf. State any assumptions made.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter16: Shallow Foundations-bearing Capacity

Section: Chapter Questions

Problem 16.19CTP: A 2.0 m 2.0 m square pad footing will be placed in a normally consolidated clay soil to carry a...

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A proposed office building will include a 10 ft x10 ft square, 3 ft deep (the footing height is also 3 feet) spread footing. The normally consolidated clay has the following engineering properties: Ydry = 115.0 pcf $'=24° c'= 90.0 psf Cc/(1+eo) = 0.15 The soil stratum extends to a great depth, and the ground water table is 50 ft below the ground surface. What is the maximum bending moment from the earthquake that this foundation can support? Consider bending moment only about one axis.
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)
(c) Serviceability limit state is the critical criterion for the design of a square footing on the soil profile shown in Figure Q-c. The groundwater level is 3 m below the ground surface, but is expected to seasonally rise to the surface. The applied loading will cause a vertical stress increase at the center of the clay layer of 15 kPa. Calculate the consolidation settlement of theclay.
4. a) For the footing shown in figure 2, determine the length of the footing (given B 2.0m) for tolerable maximum ultimate settlement due to consolidation of the clay layer is 10 cm. b) Calculate the immediate settlement 3.0m 10.0m 120t 2.0m Sand y 1.60/m¹ U-035 E-30 MPa clay Your 1.950/m¹ u-0.4 E-20 MPa Cc-0.32 e-1.1 Figure 2
The square footing shown in the figure carries a load of 3500 kN. Assume that the stress below the footing is distributed at a slope of 1H:2V. The clay layer is overconsolidated with OCR -2 Q - 3500 kN 4mx Sm 0.6 m Ya - 17.5 kN/m Sand 0.6 m GWT Sand 1.2 m 7'= 8.49 kN/m Yrat = 17.1 kN/m Clay e, = 1.4 C, = 0.06 = 0.38 1.2 m etermine the settlement of the clay layer.
Problem 1 A 3m x 3m square footing is constructed at a depth of 2m in a 26m deep clay layer with following soil properties: g =16.5kN/m3, Normally Consolidated Clay, eo= 0.65, Cc = 0.25,ms=5 and Es= 6.0 MN/m2. If there is a 1000kN structural load on the footing, calculate the consolidation settlement of the footing. A 2m X 2m footing carrying 1400kN load is constructed in a site with 2.5m thick clay layer under a 2.5m thick sand layer. If the footing and the ground water table are located at 1.5m below the surface, calculate the consolidation settlement of the footing. You may assume the following soil properties: for sand gsat = 19.25kN/m3 and gt = 7kN/m3, and for clay eo= 0.65, Cc = 0.25, Cs = 0.06, s’p = 200kN/m2 and gsat =19.25kN/m3. A 1882kN load is carried by a 2.6m x 2.6m square footing at a depth of 1.4m in a 30 m deep sand layer. Given the following soil properties for soil calculate the total settlement of the footing after 10 years. Where soil properties are: g = 15.9…
Rectangular footing (4m x 5m) was supported by a saturated clay layer with a thickness of 5m. If the second layer (below the clay) was a saturated sand. The settlement that could be occurred in this site: a. Is only consolidation settlement b. None of the given answers are correct c. Is a short term settlement d. Is only long term settlement
If the elastic modulus and the Poisson's ratio of the clay layer are respectively 50 x 10³ kPa and 0.4 and if the influence factor for the strip footing is 1.75, the elastic settlement of the footing will be (a) 0.41 mm ser(b) 1.41 mm (c) 14.1 mm co (d) None of these Morks
A proposed office building will include a 10 ft x10 ft square, 3 ft deep (the footing height is also3 feet) spread footing. The normally consolidated clay has the following engineering properties:γdry = 115.0 pcfφ’=24°c’= 90.0 psfCc/(1+e0) = 0.15The soil stratum extends to a great depth, and the ground water table is 50 ft below the groundsurface.a) Using the classical piece-wise log-linear method, estimate the total settlement of thisfooting considering only the allowable bearing pressures using ASD approach. The unitweight of concrete is 150 pcf. State any assumptions made.b) What is the maximum bending moment from the earthquake that this foundation cansupport? Consider bending moment only about one axis.c) In the case of your estimated maximum bending moment, what would be the totalsettlement?
Changes at a manufacturing facility will result in replacement equipment being installed on an existing concrete pad (separate foundation). The pad is 2 m by 4 m in plan area and is supported near floor slab level directly on the surface of soil for which drained shear tests indicate a cohesion of 25 kPa and an angle of internal friction of 22°. A representative soil unit weight is 17 kN/m3. The soil rigidity index is 30. The groundwater table is very deep. Determine the maximum weight that the pad foundation should carry, applying the extended bearing capacity equation with a factor of safety of 3.
12- Calculate the net allowable soil stress of a soll with allowable stress 300 kN/m2 in the depth of 2.50 m from the soil surface under the footing of which height is 0.50 m. Unit weight of concrete is 25 kN/m3 and unit weight of the soil is 18 kN/m3. a) b) 3 d) e) 251.5 kN/m 351.5 kN/m2 251.5 kN/m3 None. 251.5 kN/m2 Boş birak
A 3 ft square footing carries a sustained load of 10.6kips. It is placed on the surface of a 30 ft thick saturated overconsolidated clay underlain by dense sand. Based on laboratory tests, the clay can be adequately modeled using the e-log-p method. The laboratory tests provide the following compressibility information for the clay: y = 123.4lb/ft³ Cc = 0.064 1+eo Cr 1+eo Aom = 920lb/ft² The groundwater table is located at the ground surface. Estimate the primary consolidation occurred in the clay layer. Solution: Preliminary Calculations: 1). It should be adequate to compute the compressibility to a depth of = 0.0024 2). Layer thickness = ft; 2). Bearing pressure at the bottom of the footing: q = Primary consolidation for each layer: a). Layer 1: 1). depth to layer midpoint = 2). Total vertical stress at midpoint: Oz ft; 3). Pore water pressure at midpoint: u = 4). Effective vertical stress at minpoint: Oz! 6). Induced vertial stress: Az = = = 9). The type of this layer of soil is :…