8. Two flat jacks, 12 in. square, are placed in the w: 3 mately circular test gallery 8 ft in diameter. na:!;a:;d ?: ififi.fi'fif& placed in the side wall. Flat jack 2 is vertical, with its edge parallel to the axis of the gallery. The cancellation pressures measured were 2500 psi with FJ 1 and 900 psi with FJ 2. Estimate the initial stresses (vertical and hori- zontal). List your assumptions
8. Two flat jacks, 12 in. square, are placed in the w: 3 mately circular test gallery 8 ft in diameter. na:!;a:;d ?: ififi.fi'fif& placed in the side wall. Flat jack 2 is vertical, with its edge parallel to the axis of the gallery. The cancellation pressures measured were 2500 psi with FJ 1 and 900 psi with FJ 2. Estimate the initial stresses (vertical and hori- zontal). List your assumptions
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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8. Two flat jacks, 12 in. square, are placed in the w: 3 mately circular test gallery 8 ft in diameter. na:!;a:;d
?: ififi.fi'fif& placed in the side wall. Flat jack 2 is vertical, with its edge parallel to the axis of the gallery. The cancellation pressures measured were 2500 psi with FJ 1 and 900 psi with FJ 2. Estimate the initial stresses (vertical and hori- zontal). List your assumptions.
Transcribed Image Text:8. Two flat jacks, 12 in. square, are placed in the wall and roof of an approxi-
mately circular test gallery 8 ft in diameter. Flat jack 1 is horizontal, and
placed in the side wall. Flat jack 2 is vertical, with its edge parallel to the
axis of the gallery. The cancellation pressures measured were 2500 psi with
FJ 1 and 900 psi with FJ 2. Estimate the initial stresses (vertical and hori-
zontal). List your assumptions.
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