Refer to Problem 13.8. If an additional requirement is that the factor of safety against uplift is at least 3 with the dead load on (live load = 0), what should be the diameter of the bell? Problem 13.8 Refer to Figure 13.25b. For the drilled shaft with bell, given: Thickness of active zone, Z = 9.15 m Dead load = 1334 kN Live load = 267 kN Diameter of the shaft, = 1.07 m Zero swell pressure for the clay in the active zone = 574.6kN/m2 Average angle of plinth-soil friction Average undrained cohesion of the clay around the bell = 144.6kN/m2 Determine the diameter of the bell, . A factor of safety of 3 against uplift is required with the assumption that dead load plus live load is equal to zero Figure 13.25b
Refer to Problem 13.8. If an additional requirement is that the factor of safety against uplift is at least 3 with the dead load on (live load = 0), what should be the diameter of the bell? Problem 13.8 Refer to Figure 13.25b. For the drilled shaft with bell, given: Thickness of active zone, Z = 9.15 m Dead load = 1334 kN Live load = 267 kN Diameter of the shaft, = 1.07 m Zero swell pressure for the clay in the active zone = 574.6kN/m2 Average angle of plinth-soil friction Average undrained cohesion of the clay around the bell = 144.6kN/m2 Determine the diameter of the bell, . A factor of safety of 3 against uplift is required with the assumption that dead load plus live load is equal to zero Figure 13.25b
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Refer to Problem 13.8. If an additional requirement is that the factor of safety against uplift is at least 3 with the dead load on (live load = 0), what should be the diameter of the bell?
Problem 13.8
Refer to Figure 13.25b. For the drilled shaft with bell, given:
Thickness of active zone, Z = 9.15 m
Dead load = 1334 kN
Live load = 267 kN
Diameter of the shaft, 
= 1.07 m
Zero swell pressure for the clay in the active zone = 574.6kN/m2
Average angle of plinth-soil friction 
Average undrained cohesion of the clay around the bell = 144.6kN/m2
Determine the diameter of the bell, 
. A factor of safety of 3 against uplift is required with the assumption that dead load plus live load is equal to zero
Figure 13.25b
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