Excavation, Earthwork and Filling Method Statement
WORK PROCEDURE
SUBJECT:
EXCAVATION, EARTHWORK AND FILLING
BY:
QA/QC ENGINEER
APPROVED BY:
QEHS MANAGER
ACTION
1.
VERIFY
SCOPE
This procedure provides a standardised framework for the control of
excavation, earthwork and filling to ensure compliance with conditions
of contract and contract specifications.
2.
PROCEDURE
.1
All excavation, earthwork and filling will be carried out in accordance
with the specification detailed in the project contract documentation. Project
In any circumstances where specifications are not provided or they Manager
are in any way incomplete, the matter shall be referred back to
consultant for additional information.
.2
Method Statement
A method statement will be prepared and approved where deemed Project
Manager
necessary, and may include:
i)
ii)
iii)
iv)
v)
vi)
vii)
viii)
ix)
Site plan showing the location of spoil heaps for temporary
storage and if appropriate permanent storage area.
Type of plant and equipment to be used.
Means for keeping excavations free of water.
Method of trench supports.
Method and sequence of excavation to ensure that no
damage is caused to adjoining structures and property. If there
is potential for damage to adjoining structures and property,
the type of preventative measures should be indicated.
Temporary support arrangement of adjacent structures and
services passing through the site.
Method of compacting fill and testing procedure.
Health and Safety requirements.
Any other special requirements.
Method
Statement
.3
.4
Existing Utilities
i)
Liaise with all public utility companies e.g. water, electricity, Project
telephone sewerage and surface water etc. to ensure that all Manager
the available information on the location of utilities and
underground services through and adjacent to the site of the
excavation is obtained.
Drawing/
N.O.C.
ii)
Ensure that utilities and underground services are located on
Project
site using markings, which are clearly visible. Ensure those
Engineer
plant operators and operatives involved with the activity are
fully aware of the location of the various utilities and
underground services and their respective depths.
Markings
iii)
Where deemed necessary, excavate trial holes to establish Project
Engineer
the precise location and depth of services.
Trial Holes
iv)
Plant operators must be aware of overhead cables. Use height
control indicators where necessary.
Site Survey and Grid of Levels
Prior to commencement of any excavation work, a level survey will be Site
carried out to confirm the information included on the contract Engr./
drawings and to provide an accurate record of existing ground levels
Surveyor
for the calculation of quantities.
.5
Disposal of Surplus Excavated Material
Prior to any surplus excavated material being removed from the site,
documentary evidence of “approval to tip” must be obtained Project
beforehand from the relevant government/municipal departments and Manager
the owner of the land where the material is to be tipped.
.6
Survey
Adjoining Structures and Property
Prior to the commencement of excavation work, a detailed
dilapidation survey will be undertaken to record the existing condition
of the adjoining structures and property. Where necessary the survey
may include photographic records.
Approval to
Tip
This survey should be carried out in co-ordination with and involving Const.
the participation of the Consultant’s representative and the Manager
representative of the owners/occupiers of the adjacent property.
.7
.8
Dilapidation
Survey
Excavation Work
i)
Excavation shall be allowed to progress to the designed Project
formation level less 50mm (unless specified otherwise). The Engineer
remaining 50mm shall be carried out by further careful
excavation to avoid disturbing the formation level.
ii)
After reaching the designed formation level, Consultant’s QA/QC
representative shall be requested in writing to inspect and Project
approve the formation prior to the commencement of any Engineer/
subsequent activities.
iii)
Great care shall be taken to minimise noise, vibration and dust Site
pollution, which can cause nuisance and damage, particularly Safety
if the site is located in a built-up area.
iv)
Sides of all excavations should be properly supported using
an appropriate method as detailed in the Method Statement.
Filling
Project
Engineer/
Site
Safety
Consultant’s QA/QC
Survey
Inspection
Request
Method
Statement
Method
Statement
Inspection
Request
i)
Prior to commencement of filling, the
representative shall be requested in writing to inspect and
approve the fill starting level.
ii)
Filling shall be carried out using approved materials in Project
accordance with the specification which can either be selected Engineer
from the material on site or imported from selected and
approved sources.
Source
Documents
Project
Filling shall be carried out as per approved method and as per Engineer
Method
Statement
iii)
the contract specification.
PROJECT:
SITE NO.:
CHECK SHEET FOR EXCAVATION AND FILL TO FORMATION
SUBCONTRACTOR
Sheet No.
MAIN CONTRACTOR
SECTION OF WORK _____________________________ LOCATION _________________
STAGE
EXCAVATION
TO FORMATION
ITEM
1. Record existing GLs before excavation.
2. Check level profiles.
3. Check for location of buried utilities e.g.
foundations, drains, cables, duct, telephone lines,
sewerage lines.
4. Check temporary support/batters to sides of
excavation.
5. Record soft spots, obstructions, groundwater etc.
and how dealt with.
6. Check suitability of formation including test results
(CBRs, PLT etc).
7. Check and record final levels.
FILL TO
FORMATION
Checked
by
SE
SU
SE
SE/SSO
SE
SE
8. Obtain consultant’s approval for founding level.
9. Check approval to tip.
SU
QA/QC
PE
APPROVAL TO PROCEED
CM
1.
2.
SU
3.
4.
5.
6.
7.
Record existing GLs before fill.
Check existing services located, protected or
raised as specified.
Check level profiles.
Check fill material is as specified.
Record source and approval.
Check fill material laid and compacted to
specification. Record test results.
Check final levels and record.
Obtain consultant’s approval.
APPROVAL TO PROCEED
DATE
SE
SU
PE
PE
SU
QA/QC
CM
CM – Construction Manager, QA/QC – Quality Assurance/Quality Control, PE - Project Engineer,
SE - Site Engineer, SU – Surveyor, SSO – Site Safety Officer