22 22 0 25 17 12 2 50 50 75 15 Strength Parameters verses Level ■BH01 Cu #BH02 Cu ABH 3 Cu ABH4 Cu ABH5 Cu ABH6 Cu Undrained shear strength, C, (kPa) 100 125 150 175 200 225 250 275 300 325 350 22 Made ground Soft peaty CLAY becoming firm with depth 17 12 Level (MOD) 2 Firm grey CLAY Very stiff silty CLAY The tender is based on 600mm piles being adopted for the whole of the project, if feasible. It is proposed that 3% of all piles will undergo working pile tests. To enable the piles, within the basement, to be installed following excavation, segmental flight auger (SFA) piles will be used with a maximum pile length of 12.1m being installed from a temporary formation level of 16.42mAOD The cut off level of the piles is 14.53mAOD & the top level of the stiff CLAY is considered to be 5.7mAOD. The total effective stress due to the structure at cut off level is 249kPa considering the water table to be at ground level. (grey day) =214kN/m² Ysub(grey clay) =13kN/m³ Ysub(stiff clay) =10kN/m³ Calculate the difference between C1 & C2 pile capacity, considering the borehole data plot in figure 1 and by applying the following formula: FINAL ANSWER = C1 Rd - C2 Rd Note: SFA is treated the same as continuous flight auger (CFA) piles in design)
22 22 0 25 17 12 2 50 50 75 15 Strength Parameters verses Level ■BH01 Cu #BH02 Cu ABH 3 Cu ABH4 Cu ABH5 Cu ABH6 Cu Undrained shear strength, C, (kPa) 100 125 150 175 200 225 250 275 300 325 350 22 Made ground Soft peaty CLAY becoming firm with depth 17 12 Level (MOD) 2 Firm grey CLAY Very stiff silty CLAY The tender is based on 600mm piles being adopted for the whole of the project, if feasible. It is proposed that 3% of all piles will undergo working pile tests. To enable the piles, within the basement, to be installed following excavation, segmental flight auger (SFA) piles will be used with a maximum pile length of 12.1m being installed from a temporary formation level of 16.42mAOD The cut off level of the piles is 14.53mAOD & the top level of the stiff CLAY is considered to be 5.7mAOD. The total effective stress due to the structure at cut off level is 249kPa considering the water table to be at ground level. (grey day) =214kN/m² Ysub(grey clay) =13kN/m³ Ysub(stiff clay) =10kN/m³ Calculate the difference between C1 & C2 pile capacity, considering the borehole data plot in figure 1 and by applying the following formula: FINAL ANSWER = C1 Rd - C2 Rd Note: SFA is treated the same as continuous flight auger (CFA) piles in design)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:22
22
0 25
17
12
2
50
50
75
15
Strength Parameters verses Level
■BH01 Cu #BH02 Cu ABH 3 Cu ABH4 Cu ABH5 Cu ABH6 Cu
Undrained shear strength, C, (kPa)
100 125 150 175 200 225 250 275 300 325 350
22
Made ground
Soft peaty
CLAY
becoming
firm with
depth
17
12
Level (MOD)
2
Firm grey
CLAY
Very stiff silty
CLAY
Transcribed Image Text:The tender is based on 600mm piles being adopted for the whole of the project, if feasible. It is proposed that 3% of all piles will undergo working pile tests.
To enable the piles, within the basement, to be installed following excavation, segmental flight auger (SFA) piles will be used with a maximum pile length of 12.1m being installed from a
temporary formation level of 16.42mAOD
The cut off level of the piles is 14.53mAOD & the top level of the stiff CLAY is considered to be 5.7mAOD.
The total effective stress due to the structure at cut off level is 249kPa considering the water table to be at ground level.
(grey day)
=214kN/m²
Ysub(grey clay) =13kN/m³
Ysub(stiff clay)
=10kN/m³
Calculate the difference between C1 & C2 pile capacity, considering the borehole data plot in figure 1 and by applying the following formula:
FINAL ANSWER = C1 Rd - C2 Rd
Note: SFA is treated the same as continuous flight auger (CFA) piles in design)
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