A circular foundation having 9o=720 kPa and radius of 2m is placed on a soil section as shown in figure (1), if the ground water level was located at N.G.S, for the soil element (A) which located under the center of the foundation at the middle of clay layer. Calculate the followings: Sandy soil Ysat19.74 kN/m³ ww eo = 0.54 E Clayey soil Yat19.18 kN/m³ eo =0.8 Calculate the Effective stress Choose... + at soil element (A) in (kPa) The increase in stress (kPa) due to footing load (Use Approximated method) at soil element (A) Choose...

A circular foundation having 9o=720 kPa and radius of 2m is placed on a soil section as shown in figure (1), if the ground water level was located at N.G.S, for the soil element (A) which located under the center of the foundation at the middle of clay layer. Calculate the followings: Sandy soil Ysat19.74 kN/m³ ww eo = 0.54 E Clayey soil Yat19.18 kN/m³ eo =0.8 Calculate the Effective stress Choose... + at soil element (A) in (kPa) The increase in stress (kPa) due to footing load (Use Approximated method) at soil element (A) Choose...

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Problem l: For Problem Number 30. A layered soil has the following data; H= 1.5 m k,= 10°cm/sec k2= 3.0 x 10°cm/sec H2= 2.5 m H3= 3.0 m k3= 3.5 x 10°cm/sec 30) Determine the ratio kH(eq)/K vleg). a) 36.80 b) 37.27 c) 35.40 d) 33.90
Soil mechanics solution need
A footing 4 mx 2 m in a plan, transmits a pressure of 150kN/m² on a cohesive soil have E = 6 x 10¹kN/m² and × μ = 0.5. What will be the immediate settlement of the footing at the center? Take influence factor = 1.5
Subject: Geotechnical engineering Answer must be 4.95mm
4. 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 150kPa
A square footing is loaded as shown in Figure 05.13. The center of the base of footing is at coordinate (0, 0, 0). Determine the increase in vertical stress at a point whose coordinate is (3, 0, 4) using pressure isobars based on Boussinesq equation for square footings shown in Figure 05.7. O O O 10.215 O 10.512 10.125 10.251 P = 900 KN #7 2 m Figure 05.13
A rectangular concrete slab, 3mx4m, rests on the surface of a soil layer as shown in the figure. The saturated clay has over consolidation ratio of 2, w=38%, and Cr=0.05. Determine the primary consolidation settlement of the clay. The load on the foundation is 2000OKN. Assume that 20% of voids in sand is air and porosity of sand is 0.43. Cc=0.28 Gs=2.65 4 m Fine sand 5 m Clay 2 m
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2. Bascd on the following figure, all layers shown in the figure are fully saturated. The pressure applying from a building to the ground surface is about 900 kPa. Assume Gs = 2.7 for each layer. (a) Determine the cffective stress for a soil element at the middle of each layer. (b) Determine the vertical stress increase at the middle of the clay layer under the center of the foundation (10 mx20 m). (c) Determine the primary consolidation settlement of the clay layer at the center of the foundation if the clay is overconsolidated with an OCR=1.5. (d) How long will consolidation settlement take for 50% consolidation to occur in the field if the value of C, = 10 m2/year. 20 m 10 m 20 m Lightly cemented (calcium carbonate) sand/gravel = 17 kN/m Clay properties: w = 55% C = 0.4 C, = 0.05 20 m 3 m Soft clay 15 m Sand and gravel w=10% Rock
Q. 12 A soil profile at a certain location is as shown in figure. A rigid circular foundation of 4 m diameter rests on the sand. The contact pressure at the underside of the foundation is 230 kN/m?. The average coefficient of compressibility of the clay is 0.65 × 10-3 m2/kN for the stress range encountered. The ultimate settlement of the foundation assuming 45° load distribution