Box Jacking
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Transcript of Box Jacking
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By
ANTHONY CYRIL .G
HARIRAM .B
SABARIMUTHU
MAGESH . H
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BOX JACKING
Box jacking is jacking a large precast reinforced
concrete box horizontally through the ground,
usually beneath a road or railroad that must not be
interrupted.
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CONCRETE STRUCTURE
JACKING PUMPS
LAUNCHING SLAB
EXCAVTING MACHINES
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CONCRETE STRUCTURE
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The box is built on a greased launch slab lined upexactly with its final location.
It is then pushed straight ahead, guided by curbs on
the left and right to slide straight off the launch slab.
A steel shield installed on the front cuts the hole with
minimal overcut.
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The major advantage of the process is its
essential simplicity.
No intermediate ground supports are needed.
The structure is built away from the roadway,in the clear, without the constraints of shoringand traffic controls.
During the construction, traffic is proceedingoverhead normally, unaware of the
construction below.
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