13
User Guide - Manhole Box
Original Working Instructions
Usage Instructions
Important Installation Notes
•
All personnel involved in installation must wear relevant personal protective
equipment.
•
Never enter an unsupported excavation.
• Stage 6 should be carried out when the top of the base is approximately
200mm above ground level.
•
It is mandatory to use edge protection when carrying out trench support.
Installation Instructions
1.
Excavate the ground to approximately 1m or deeper, as ground conditions
permit.
2. Ensure spoil is discharged away from the edge of the trench.
3.
Attach a certified 4 leg chain sling of the correct volume and lower the box
into the excavation.
4.
Backfill against the sides of the panels.
5. The excavator operator digs progressively between the two faces of the box
panels.
6. Then uses the back of the bucket to push down on the 4 corners of the box in
turn. This is known as the ‘dig and push’ technique.
7.
Continue to perform the ‘dig and push’ installation technique until the box is
at the required depth.
8. Conquip recommend the base box protrudes 1m above ground level before
adding an extension box to act as a safety barrier.
9.
To add an extension box, attach the connectors to each corner inside the
base box and secure with pins and R-clips.
10.
Attach a certified 4 leg chain of the correct volume to the extension box and
lower it on top of the base box.
11.
To secure the Manhole Box, add Conquip Edge Protection panels. Complete
the final ‘dig and push’ until the top of the Manhole Box is at ground level.
Ensure the force is applied to the edge of the box panels, not the Edge
Protection panels.
Original Working Instructions
Usage Instructions
Extraction
1.
Backfill the excavation around the Manhole Box.
2.
Attach a certified lifting chain to one of the lifting points of the End Panel and
slowly lift to loosen the ground.
3.
Repeat this process on the opposite lifting point, then alternate between the
two until the top panel is 90cm above ground level.
4.
Attach a suitably rated 2 leg chain to the corner lifting points of the End
Panel. Slowly lift it away from the excavation and lay on timber bearers.
5.
Backfill inside the Manhole Box.
6.
Attach a certified lifting chain to one of the top lifting points on the extension
box.
7.
Slowly lift the corner of the extension box.
8.
Repeat this process for each lifting point in turn until the extension box is
90cm above the ground.
9.
Loosen the telescopic clamps and remove the Edge Protection panels.
10.
Backfill the excavation.
11.
Reattach a certified lifting chain to one of the top lifting points on the
extension box.
12.
Lift the corner of the extension box. Repeat this process for each lifting point
in turn until the base box is 90cm above ground level.
12.
Conquip recommend using End Panels to secure the excavation and prevent
potential cave-ins.
13.
To assemble, lay on timber bearers and connect to each other using the
plates, bolts, and nuts.
14.
Attach a suitably rated 2 leg chain to the top lifting points of the End Panels
and lift into place. Use the back of the excavator bucket to push the End
Panel down ground level.
15.
Backfill against the End Panel to secure the Manhole Box.
Содержание Manhole Box
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