Important Points SOP (Standard Operating Procedure) During the Inspection of RCC NP4 Pipes
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Methodology
for Trenchless Piping by Jack Pushing Method
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Work Under Pit (Photo Credit: Ritesh Raj) |
1.0 Purpose:
The
Purpose of this procedure is to lay guidelines, requirement and to establish a
method or a system to control the open cutting & trenchless activity.
2.0 Scope :
The
Scope of the works covers the laying of RCC Pipe NP4 of 1000mm diameter on LHS
of NH (NH No. will be mention) Road from (Chainage 1) to (Chainage 2) by using
Trenchless Jack Pushing method.
3.0 Methodology:
3.1 Survey
Alignment
of Pipe Line to be marked from the position of Manhole to Manhole which is to
be constructed.
3.2 List of Manpower:
·
Engineer -
As per Requirement
·
Safety Officer -
As per Requirement
·
Supervisor -
As per Requirement
·
Excavator Operator -
As per Requirement
·
Hydra Operator -
As per Requirement
·
Welder -
As per Requirement ( for Strutting and shoring)
·
Fitter -
As per Requirement (for Strutting and shoring)
·
Electrician -
As per Requirement
·
Mechanic -
As per Requirement
·
Rigger -As
per Requirement
·
Unskilled Labour -
As per Requirement
Also Read:-Consistency Test of Cement
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Work Under Pit (Photo Credit: Ritesh Raj) |
3 List of Machinery:
·
JCB / Excavator Machine - As per
Requirement
·
Tracker Machine -
As per Requirement
·
DG Set - As per
Requirement
·
Hydraulic Power Pack Machine for Jack Pushing - - As per Requirement
·
Hydra -
As per Requirement
·
Dewatering Pump 10HP -
As per Requirement
·
Exhaust Fan - As per Requirement
·
Lighting Arrangement inside Pipe - As per Requirement
3.3 Procedure:
1. Underground Utilities to be
checked with tracking machine before start of the work. If any Underground
facility found then it is to be informed to concern authority and change in alignment
to be initiated and approved by the competent authority.
2. After checking with Tracking
Machine and if there are no underground utilities or alignment approved, the
marking of Manhole to be done on both ends and marking to be done on the ground
for the underground piping.
3. Area to be properly barricaded
with the steel barricading/ proper barricading and if diversion is to be made
then the board of Diversion to be installed at both ends.
3. Entry Pit is to be excavated to
the sufficient capacity so that RCC Pipe line of ----- meter (mentioned in
drawing)length can be laid through this entry point by jack pushing method.
4. After Pit excavation the proper
Strutting and Shoring to be done with Steel material
5. Inside the excavated pit, the RCC
wall to be constructed on opposite direction of pipe pushing for support of
jack resting.
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Work Under Pit (Photo Credit: Ritesh Raj) |
Also Read:- Aggregate Impact Value Test
6. Pushing of RCC Pipe to be started
after that with Hydraulic Power Pack Machine from 100mm to 250mm(and mentioned
in specifications) and manually excavation of soil in pushing alignment with
crow bar and pixels and disposal of soil outside of pit by the use of Hydra
machine.
7. Activity of Pushing and Manual excavation inside of pipe to be done in tandem.
8. Arrangement of proper lighting and
exhaust to be done for proper working inside of pipe line
8. Alignment & Level of pipe to
be checked with Tracker Machine.
9. With the pushing and manual
excavation method the pipe line to be laid up to the next manhole.
Also Read: Elongation Test of an Aggregate
10. Then the RCC Wall made inside of
the entry pit to be demolished.
11. Construction of Manhole as per
the procedure to be done in the excavated entry pit.
12. Backfilling in layers and proper
Compaction shall be done up to the existing ground level.
13. By this way the work will go on
from the entry point of next manhole.
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