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Assignment 3: Interpretive Report Length of report (not including cover page): 5 to 10 pages 1. AVAILABLE DATA The site investigations for the project were carried out and details are contained in the...

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Assignment 3: Interpretive Report Length of report (not including cover page): 5 to 10 pages 1. AVAILABLE DATA The site investigations for the project were carried out and details are contained in the provided information. The project is a 20 storeys building with commercial ground floor suspended over two levels of basement car parks. The diameter of secant piled wall is 500mm and spacing between the centres of the piles is 800mm. The toe of wall is embedded into soil layer at a depth 13 m below the ground level. The wall was designed for construction of two basements. The maximum excavation depth was set to be 8.2m and one level of anchor was adopted to construct the basements. 2. TASKS You are required to assess and interpret the information. Make necessary assumptions if needed. You must indicate the assumptions in your report. The following specific tasks must be completed: a. Based on Figure E1, determine the Soil Profile along Section A-A. Use this to develop a general Soil Profile for your calculation. b. Based on the Bore-logs, in each soil layer, determine (in table): ? Unit Weight ? Relative Density (if relevant) ? Friction Angle (if relevant) ? Undrained shear strength, Su (if relevant) ? Dilation Angle (if relevant) ? Young’s Modulus, E (if relevant)
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Assignment 3: Interpretive Report Length of report (not including cover page): 5 to 10 pages 1. AVAILABLE DATA The site investigations for the project were carried out and details are contained in the provided information. The project is a 20 storeys building with commercial ground floor suspended over two levels of basement car parks. The diameter of secant piled wall is 500mm and spacing between the centres of the piles is 800mm. The toe of wall is embedded into soil layer at a depth 13 m below the ground level. The wall was designed for construction of two basements. The maximum excavation depth was set to be 8.2m and one level of anchor was adopted to construct the basements. 2. TASKS You are required to assess and interpret the information. Make necessary assumptions if needed. You must indicate the assumptions in your report. The following specific tasks must be completed: a. Based on Figure E1, determine the Soil Profile along Section A-A. Use this to develop a general Soil Profile for your calculation. b. Based on the Bore-logs, in each soil layer, determine (in table): ? Unit Weight ? Relative Density (if relevant) ? Friction Angle (if relevant) ? Undrained shear strength, S (if relevant) u ? Dilation Angle (if relevant) ? Young’s Modulus, E (if relevant) ? Poisson’s Ratio, ?. (if relevant) ? Coefficient of Earth Pressure at Rest, K . (if relevant) o ? Active Pressure Coefficient, K . (if relevant) a ? Passive Pressure Coefficient, K . (if relevant) p c. Identify and summarise the required soil parameters. Table 1. Soil Parameters (examples) 3 Stratum ? (kN/m ) s (kPa) ?` (deg) c` (kPa) E (MPa) u - Soil Layer A XXXXXXXXXX - - - - - Soil Layer B - - - - : - - - - - Soil Layer n - - d. Determine the Total and Effective vertical stresses (along Section A-A) profile (see Figure E2). Also, determine the Total and Effective horizontal stresses (along Section A-A) profile (see Figure E2). e. Along Section...

Answered Same Day Dec 27, 2021

Solution

Robert answered on Dec 27 2021
137 Votes
Soil Report.xlsx
2
a) General soil profile:-
To Analyse Section A-A We may consider Bore hole location Marked
BH3,BH,4 & BH5 .
BH3:
100mm
RL 5.1
8 .2 m
13m 11.8 m
RL -3.1
.6 m
RL -7.9
BH4:
100mm
RL 5.5
8 .2 m
13m
RL -2.7
RL -7.5
12.4m
.6m
a. Based on Figure E1, determine the Soil Profile along Section A-A. Use this to develop a general Soil Profile for your calculation.
.6m
BH5:
100mm
RL + 6
8 .2 m
13m
RL -2.2
RL -7
STRATA 1
The top most layer was essentially a fill comprised of sand,
own fine sand with concrete boulder and course gravel.
Thickness varied from .6 m in BH 3 to .6m in BH4 to 1m in BH5 Classification:Fill Fill
BH3 BH4 BH6
+6 WT N Value from standard penetration test ranged normally from 2-5
+5.5 Avg N value may be considered as 2
+5.1 .6m 1m Moisture found in all bore hole except BH3
.6 m Average strata thickness= 0.733 m
STRATA 2
The second layer was essentially sand light
own with
own and dark gray lenses fine to medium.
Thickness varied from 11.8 m in BH 3 to 14.6m in BH4 to 17.2m in BH5 Classification:Natural and fine to medium graded sand
BH3 BH4 BH6 SW
+5 N Value from standard penetration test ranged normally from 6-9
+4.9 Except one high values of 20 for BH3
+4.5 17.2m Avg N value may be considered as 17.0
11.8 m Average strata thickness= 14.000 m
7.3
STRATA 3
The third layer was essentially Peat for BH3 rest all bore are sand.
Thickness varied from .6 m in BH 3 Classification:Natural & Peat PT
BH3 BH4 BH6 PT
N...
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