JAIHIND PROJECTS LIMITED PROCEDURE
BACK FILING AT STATION
PROJECT: NTPC JHANORE GAS PIPELINE PROJECT
PROCEDURE FOR BACKFILLING AT STATION
JPL/GSPL/PNJPL/FTS -55
Date: 28th MAY 2007
DOCUMENT RELEASE AUTHORIZATION
JPL
BIBPL
DCIL
PREPARED BY
REVIEWED BY
CHECKED &
APPROVED BY
GSPL
APPROVED
Name:
Designation:
Signature:
Date:
BACKFILING ATSTATION
DOCUMENT No.
JPL/GSPL/PNJPL/FAS-55
REV
00
Page 1 of 1
BY
JAIHIND PROJECTS LIMITED PROCEDURE
BACK FILING AT STATION
PROJECT: NTPC JHANORE GAS PIPELINE PROJECT
Owner
: GUJARAT STATE PETRONET LTD.
Format: JPL/GSPL/PNJPL/FAS-46 17
Consultant
: DORSCH CONSULT (INDIA) PVT.LTD.
Revision : 1
TPIA
: BAXCOUNSCEL INSPECTION SUREAU PVT .LTD.
Contractor
: JAIHIND PROJECT LIMITED.
Project
Sr.
No
Date:
: PAGUTHAN NTPC JHANORE PIPELINE PROJECT.
Activity Description
Controlling
Specification
Acceptance Criteria
Verifying
Document
Frequency of
Insp./ Testing
Inspection Category
Issued as: CONTROLLED COPY
This document is the property of HCC and is copyright protected.
Unauthorized photocopy either partly or fully is prohibited. Authorized
controlled copy of this document can be had from Doc. Controller
CONTENTS
SR. NO
DESCRIPTION
PAGE NO
1.
Purpose
2.
Reference
3.
Scope
3.
4.
Equipment
Material
Method
3&4
Tolerance
8
9
BACKFILING ATSTATION
Health, safety and Environment
Documentation
DOCUMENT No.
JPL/GSPL/PNJPL/FAS-55
4
4
REV
00
Page 1 of 1
Remarks
JAIHIND PROJECTS LIMITED PROCEDURE
BACK FILING AT STATION
PROJECT: NTPC JHANORE GAS PIPELINE PROJECT
PURPOSE
The purpose of this is to prepare guidelines / Methodology of Backfilling in
order to archive result as per tender specification.
2.
REFRENCE
GSPL specification Doc No:
3.
SCOPE
This procedure covers backfilling of pits and trenches for the foundation of
structures and the compaction of the backfill material.
4.
EQUIPMENTS
Compactor, Rammer, 10 ton vibration type roller, Moisture Meter, Oven,
Electric weight & Testing equipments (Proctor apparatus)
5.
MATERIAL
Accepted Material excavated from within the site area of from approved
borrow areas 20 mm to 40 mm crushed lock shall be graded with sufficient
fine material to ensure proper Binding of compaction.
6.
METHOD
6.1.1 Before starting the backfilling work, entire topsoil will be removed and
stockpiled in areas shown on the owners representatives drawings and
all others trees, bushes and other vegetations will also be removed.
6.1.2 Area will be stopped for a depth of 200mm and will be compacted to 95%
of the maximum density at OMC.
6.1.3 Accepted fill material will be carted through dumper, tractor trailer and
will be spread in uniform layers of 250mm with the help of suitable dozers.
6.1.4 Next backfill layers will be placed within 24 hours of moisture treatment
and compacted. Lab result of OMC & MDD shall be provided before
compaction. According to OMC, calculated quantity of water shall be
added & then required compaction shall be done.
6.1.5 For large areas of filling, approximately 18 Mtrs. Long and 4,.5 Mtrs. Wide
strips will be prepared for test purpose. Then this strip will be tested for
compaction either in lab or at site. After this test large areas will be
backfilled.
BACKFILING ATSTATION
DOCUMENT No.
JPL/GSPL/PNJPL/FAS-55
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Page 1 of 1
JAIHIND PROJECTS LIMITED PROCEDURE
BACK FILING AT STATION
PROJECT: NTPC JHANORE GAS PIPELINE PROJECT
6.1.6 Loose layer thickness will be 250 mm thick before compaction.
6.1.7 Backfilling of foundation pits and trenches will be carried out after
adequate strength has reached for foundations and structural work.
6.1.8 After spreading of backfill material, it will be watered and compacted in
layer not exceeding 150mm in depth, when compacted to achieve 95% of
the maximum dry density & moisture content within 2 % of OMC.
6.1.9 For compaction plate compactors and any other suitable compactors will
be used for achieving desired compaction.
6.1.10 Timber sheeting and other excavation supports will be removed as the
process of backfilling proceeds.
6.1.11 To prevent ponding of water, a system of temporary drainage will be
provided.
7.
TOLERANCE
As per Specification
8.
HEALTH, SAFETY AND ENVIRONMENT
1. PPE is a must in this activity
2. The Pits and trenches should be properly barricaded.
9.
DOCUMENTATION
Inspection Test Plan:
Inspection Report
Dry Density
JPL/GSPL/PNJPL/FAS :
JPL/GSPL/PNJPL/FAS:
JPL/GSPL/PNJPL/FAS -
Note: In case of any conflict between the requirements of this procedure and that
of the above referred specification the requirements of the latter shall govern,
until and unless specific intention is meant.
BACKFILING ATSTATION
DOCUMENT No.
JPL/GSPL/PNJPL/FAS-55
REV
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Page 1 of 1
JAIHIND PROJECTS LIMITED PROCEDURE
BACK FILING AT STATION
PROJECT: NTPC JHANORE GAS PIPELINE PROJECT
Owner
: GUJARAT STATE PETRONET LTD.
Format: JPL/GSPL/PNJPL/FAS-46 17
Consultant
: DORSCH CONSULT (INDIA) PVT.LTD.
Revision : 1
TPIA
: BAXCOUNSCEL INSPECTION SUREAU PVT .LTD.
Contractor
: JAIHIND PROJECT LIMITED.
Project
: PAGUTHAN NTPC JHANORE PIPELINE PROJECT.
Sr.
No
Submission & Obtaining
approval of procedure
Recording of levels prior to
backfilling
Controlling
Specification
Acceptance Criteria
Contract
Specification
1013-113-202
Approved
Procedure HCC
NOVA P 46 17 11
Approved
Procedure HCC
NOVA P 46 17 11
Approved
Procedure HCC
NOVA P 46 17 11
Approved
Procedure HCC
NOVA P 46 17 11
Approved
Procedure HCC
NOVA P 46 17 11
Approved
Procedure HCC
NOVA P 46 17 11
Approved
Procedure HCC
NOVA P 46 17 11
Contract
Specification
1013-113-202
Approved
Procedure HCC
NOVA P 46 17 11
Approved
Procedure HCC
NOVA P 46 17 11
Approved
Procedure HCC
NOVA P 46 17 11
Approved
Procedure HCC
NOVA P 46 17 11
Approved
Procedure HCC
NOVA P 46 17 11
Approved
Procedure HCC
NOVA P 46 17 11
Approved
Procedure HCC
NOVA P 46 17 11
Activity Description
Date:
Selection and approval of
materials and determination
of OMC, MDD & Others
Pre watering and leveling of
first layer, watering and
compaction
Density tests / Degree of
Compaction
Leveling of Subsequent
layers till required level is
achieved
Removal of timbers supports
if any
Safety
Legend
W : Witness
H : Hold
RM : Random Inspection
R : Review Documents
Verifying
Document
Inspection Category
Frequency of
Insp./ Testing
TPIA
DCIL/
GSPL
Approved
Procedure
At the
Beginning
AP
AP
HCC NOVA F
46 17 11-01
Prior to
Backfilling
RM
RM
Source
Approval
At the
Beginning
RM
W/R
HCC NOVA F
46 17 11-01
Every Layer
RM
RM
HCC NOVA F
46 17 11-02
Every Layer
RM
RM
HCC NOVA F
46 17 11-01
For Final
Layer
RM
RM
HCC NOVA F
46 17 11-01
At the
Beginning
RM
RM
HCC NOVA F
46 17 11-01
RM
RM
I
: Implementation
AP : Acceptance/Approval
For JPL
For BIBPL
For DCIL / GSPL
Name:
Name:
Name:
Sign:
Sign:
Sign:
Date:
Date:
Date:
BACKFILING ATSTATION
JPL
DOCUMENT No.
JPL/GSPL/PNJPL/FAS-55
REV
00
Page 1 of 1
Remarks
JAIHIND PROJECTS LIMITED PROCEDURE
BACK FILING AT STATION
PROJECT: NTPC JHANORE GAS PIPELINE PROJECT
Owner
: GUJARAT STATE PETRONET LTD.
Format: JPL/GSPL/PNJPL/FAS-
Consultant
: DORSCH CONSULT (INDIA) PVT.LTD.
Revision : 1
TPIA
: BAXCOUNSCEL INSPECTION SUREAU PVT .LTD.
Contractor
: JAIHIND PROJECT LIMITED.
Project
Date:
: PAGUTHAN NTPC JHANORE PIPELINE PROJECT.
Observation
SL
No
Description
Recording of levels prior to
backfilling
Pre watering and leveling
of first layer, watering and
compaction
Density tests / Degree of
Compaction
Leveling of Subsequent
layers till required level is
achieved
Removal of timbers supports
if any
Safety
Yes/Ok
For JPL
Name:
Sign:
Date:
Owner
For BIBPL
Name:
Sign:
Date:
: GUJARAT STATE PETRONET LTD.
BACKFILING ATSTATION
DOCUMENT No.
JPL/GSPL/PNJPL/FAS-55
No
Remarks
N/A
For DCIL / GSPL
Name:
Sign:
Date:
Format: JPL/GSPL/PNJPL/FAS-
REV
00
Page 1 of 1
JAIHIND PROJECTS LIMITED PROCEDURE
BACK FILING AT STATION
PROJECT: NTPC JHANORE GAS PIPELINE PROJECT
Consultant
TPIA
Contractor
Project
: DORSCH CONSULT (INDIA) PVT.LTD.
Revision : 1
: BAXCOUNSCEL INSPECTION SUREAU PVT .LTD. Date:
: JAIHIND PROJECT LIMITED.
: PAGUTHAN NTPC JHANORE PIPELINE PROJECT.
Inspection date:
Location:
Spread:
From ________To_________
S No
Activity / description
Sample 1
1
Weight of core cutter + wet soil (Ws) gm
2
Weight of core cutter (We). gm
Weight of wet soil (Ws - We) gm
Volume of core cutter (Ve) cm3
Bulk density (BD = (Ws - We)/ve) gm/cm3
Water content container no
Weight of container with lid (W1) gm
Weight of container with lid and wet soil (W2) gm
Weight of container with lid and Dry soil (W3), gm
Water content (W), percent
W = {(W2-W3) x [ 100 / (W3 W1)}
Field Dry Density
FDD= 100 x BD / (100 + W) in gram / cc
Lab Dry Density gram / CC
Lab.OMC %
Percentage of field DD in respect of lab
DD = FDD x 100
MDD
Laboratory dry density in grms / cc
10
11
12
13
14
Layer:
Sample 2
Sample 3
Sample 4
Remarks:
For JPL
For BIBPL
For DCIL / GSPL
Name:
Name:
Name:
Sign:
Sign:
Sign:
Date:
Date:
Date:
BACKFILING ATSTATION
DOCUMENT No.
JPL/GSPL/PNJPL/FAS-55
REV
00
Page 1 of 1
