Q2. A compacted fill embankment is shown in Figure 3. Determine the stress increase atpoints A and B due to the embankment load.+B2.5 m2.5 m6 m1.514.0 mA8 m+Compacted fill7= 21 kN/m³Figure 3. Stress increase under an embankment6 m

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Answered: Q2. A compacted fill embankment is…

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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Q: You have been assigned to check the stability of a pond constructed in stiff saturated clay underlain by a layer of sand. The necessary information are given in the following figure. (i) Find effective stress at A and determine the stability of cut under given condition. (ii) What should be water level into the pond to ensure factor of safety = 1.5. (Given that yw = 9.81 kN/m³) H = 5 m 7m 2m 2m J Saturated clay Sand Ysat = 16 kN/m³ 4m Ysat = 15 kN/m³
Q1 The lower sand layer in the soil profile shown below is in an artesian condition. Calculate: 2 a) The effective stress () at the top and base of the clay layer. 2b) The height of water in the piezometer for 5 = 0 at the base of the clay layer. > c) The maximum depth (Z) of the proposed excavation (Figure Q1 (b)). (Assume Z>2 m). 4.0 m 2.0m Yary 16.6 kN/in³ Sand Ground water table Z Y.. W.T. Sand 2.0 m Sand Ysa 20.6 kN/m³ 4.0 m Year 20.6 kN/m³ Clay R Sand Ysar=20.5 kN/m³ Figure Q1 (b) Clay Sand Figure Q1 (a)
(Use The Figure (10.20) to find the solution of this question) An embankment load on a silty clay soil layer as shown below. Determine the stress increase under the embankment at points A and B that are loaded at a depth of 6 m below the ground surface. 5m 1H:2V 1H:2V 1H:1V 8 m y-18 kN/m y-18 kN/m 6 m 4. y Figure 10.19 Embankment loading 050 TTTT 3.0 20 16 045 14 12 LO 040 09 07 035 06 030 05 04 - 025 03 020 02 015 a.10 Figure 10.20 Osterberg's chart for determination of vertical stress 0.00 due to embank- 0.01 0.1 10 100 ment loading 327
Consider three layered soil strata as shown in the figure below. The total head loss for the given soil strata is: T 2 m Flow k₁ = 2 × 10-² cm/s D D 0.8 m 3 m k₂ = 3 × 102cm/s L=1m 2 m k₁ = 4 × 102cm/s
The soil in a deposit underlying an area where a level ground surface exists has a unit weight of 22 kN/m3. Determine the principal stresses o1 and oz at a depth of 5 m below the soil surface if the lateral pressure is 0.50 of the vertical pressure. Adjust your answer to ZERO decimal places. 01 = kN/m2, 03 = kN/m2
No need to input units in final answer
An embankment load on a silty clay soil layer as shown below. Determine the stress increase under the embankment at points A and B that are loaded at a depth of 6 m below the ground surface, please use figure (10.20). 5 m 1Н:2V, 1H:2V 1H:1V 8 m y=18 kN/m y=18 kN/m" 6 m : B Figure 10.19 Embankment loading 0.50- 3.0 20 16 0.45- 14 1.2 LO 0.40 - 0.9 0.8 0.7 0.35 - 0.6 030- 05 04 * 025 - 03 0.20 - 0.2 0.15 - 0.10 - 0.1 0.05- Figure 10.20 Osterberg's chart for determination of vertical stress 0.00 TI TT - due to embank- 01 0.1 10 ment loading 100 327
Figure Q1(c) shows the soil profile with groundwater table is 6 m from thesurface impermeable layer. Calculate the total stress, pore water pressureand effectives tress at points D.
EXAMPLE 10.15 An embankment is shown in Figure 10.29a. Determine the stress increase under the embankment at points A₁ and A₂. 14 m- 5m 11.5 m- 5 m č A₂ At point A₁ -14 m- → 5m → ← 5m 5 m A₂ 11.5 m At point A₂ H=7m ► 5 m 8 A₁ 5m+¦+ H=7m >· 5 m X A₁ 14 m 16.5 m 5 m 14 m EXAMPLE 10.15 An embankment is shown in Figure 10.29a. Determine the stress increase under the embankment at points A, and A₂. 14 m 16.5 m y= 17.5 kN/m³ 5m9 = (2.5 m) x (17.5 - A₂ H A0₂ (1) kN/m³) = 43.75 kN/m2 Aσ₂ (1) y= 17.5 kN/m² B A₁ 1 90 = 122.5 kN/m2 + + T 5m 9=(7 m) x (17.5 kN/m³)= 122.5 kN/m² % = 122.5 kN/m² A₂ 2.5 m →→ ● A0₂ (2) A₁ 14 m- A₂ (2) 9 (4.5 m) x (17.5 kN/m³)= 78.75 kN/m² Aar: (33) A₂ 14 m 9 m ➜ 14 m 1
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Q2. A compacted fill embankment is shown in Figure 3. Determine the stress increase at points A and B due to the embankment load. + 2.5 m 2.5 m 6 m 1.5 1 4.0 m 8 m Compacted fill -y= 21 kN/m³ 6 m