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Monday, August 1, 2016
Sunday, July 31, 2016
Method Statement for Earthworks, Excavation and Backfilling.
Table
of Contents
1.
Scope
/Objectives
2.
Reference
3.
Access/Egress
4.
Logistics
5.
Health
and Safety Hazards
6.
Definitions
7.
Responsibilities
/ Supervision
8.
Procedures
/Method to be Employed
9.
Training
10.
Working
hours
11.
House
keeping
12.
Manpower
Requirement & Supervision
13.
Material
Requirement
14.
Plant
& Equipment Requirement
15.
Q.C
Approvals and other Documentation
16.
Supporting
documentation
17.
Distribution
18.
Other
information
19.
Site
Safety Engineer’s Approval
20.
Attachments
(Compulsary)
·
Risk
Assessment
·
Inspection
and Test Plan
·
Quality
Control Check Lists
1. SCOPE
& OBJECTIVES
This Method Statement outlines the
procedures for Earthworks, Excavation and Backfilling.
2. REFERENCES
Contract Drawing and specification
2.1
QCS Section 12
Earthworks and Particular Specification Clause 5.2
2.2
AMTC HSE
Guidelines
2.3
British
Standards – BS 1377 : Test on Soils
2.4
Project Specs,
Section 12 - Earthworks
3. ACCESS/
EGRESS
Access will be through designated
entrance and exit pathways.
4. LOGISTICS
Contractor will deploy a
dedicated team for the earthwork, excavation and backfilling.
5. HEALTH
& SAFETY HAZARDS
Contractor will comply with all
safety measures as applicable to project safety requirements.
5.1 Excavations shall be inspected daily by
Section Engineer / Supervisor / Safety Officer.
5.2
Excavation
shall be re-inspected after rainstorms, earthquakes or any other hazard
increasing occurrences.
5.3
A
convenient and safe means of access such as stairway, ladder or ramp shall be
provided for employees to enter and leave the excavated area.
5.4
Safe
crossings shall be provided over trench excavations.
5.5
Before
opening any excavation, all underground services shall be identified and the
Supervisor shall explain to the employees all the necessary precautions that
need to be taken in the work preparation.
5.6
In
no case the excavated material shall be placed closer than 600mm from the edge
of the excavation.
5.7
Excavations
shall be provided with warning barricades.
Deep excavation to be barricaded with flashing lights during night.
5.8
The
sides of excavations shall be sloped in order to avoid sliding of sand / earth.
5.9
Personnel
Protection Equipment’s shall be used at all the times.
6. DEFINITIONS
AEB – Arab Engineering Bureau (Consultant/Engineer)
AMTC – Abdullah Al Muftah
Trading and Contracting Co., w.l.l (Main Contractor)
MS – Method Statement
QCP – Quality Control
Procedures
ITP – Inspection and Test Plan
ITA – Independent Testing
Agency
7. RESPONSIBILITIES
/ SUPERVISION
The
works will be undertaken by AMTC with a competent workforce to do the works
conforming to the project specifications through the following
responsibilities.
7.1
Project Engineer shall be responsible for
the execution of this procedure and to ensure that works are undertaken in a safe manner to the requisite
quality and to the time agreed timescale. He shall advise and coordinate with other contractors pertaining to
access and interface requirements related to the excavation works to be
undertaken.
7.2
Site Engineer shall be responsible for the site implementation of this
procedure including control and the safety
of the workers.
7.3
QA/QC Inspector shall be responsible for
the supervision of tests and inspection, control approvals for testing and inspection plan and to arrange
documentation required.
7.4
The Surveyor in coordination with site engineer has the responsibility to
perform all survey works according to
the IFC drawings.
7.5
Safety Officer shall be responsible for the strict implementation of safety
procedure during work commencements.
8. PROCEDURE
/ METHOD TO BE EMPLOYED:
8.1Preliminaries
a. Excavations shall be inspected
daily by the Site Engineer / Supervisor / Safety Officer.
b.
Excavation
shall be re-inspected after rainstorms, earthquakes or any other hazard
increasing occurrences if any.
c.
A convenient and safe means of access such as
stairway, ladder or ramp shall be provided for employees to enter and leave the
excavated area.
d.
Safe crossings shall be provided over trench
excavations.
e. Before opening any excavation, all underground
services shall be identified and the Supervisor shall explain to the
employees
all the necessary precautions that need to be taken in the work preparation.
f.
In no case the excavated material shall be
placed closer than 600mm from the edge of the excavation.
Excavations shall be provided with
warning barricades. Deep excavation to
be barricaded with flashing lights during
night.
g.
The
sides of excavations shall be sloped in order to avoid sliding of sand / earth.
8.2 Setting out
a.
Setting out of surveyed stations to be carried out from the approved control
stations provided by BEST Bureau of
Engineering Studies and temporary benchmarks. The extent of excavation
shall be marked with the provision for working space and slopes for deep
excavation. Level +3.0 QND as the starting level of the excavation.
b. Existing underground services are to be
exposed and identified by hand excavation. These will be as-built and
incorporated to the new services which will be formed as the combined services
drawing.
Proposed
works to be done shall be submitted for Client approval.
8.3 Sequences of Excavation will be
executed as follows :
• The whole area will be scraped by bulldozers up
to rock formation level which is the bottom of raft foundations/footings.
•The
isolated foundations will be excavated down to the top level of hard rock.
•The
foundations Pool Annex will be excavated -1.17M QND Level. The foundations for
Main Villa will be excavated -0.82M QND Level. The Swimming Pool will be excavated
-0.185M QND.
Excavation level will be the bottom of
foundation plus blinding thickness.
Backhoe/Excavator equipment will be
used for excavation of desert fill materials
Limestone / rock strata will be by
excavator / rock breaker.
Excavated
blinding levels will be tested for the required bearing capacity by relevant
tests.
Hand
Tools shall be used to do manual excavation as required. Care to be taken to protect existing
structures / underground services if any, while excavating adjacent to them.
Heavy equipment will not be allowed to access
whenever the required excavation/formation level is reached to avoid
disturbance of the strata.
Independent Testing Laboratory shall be
submitted to Client for approval.
8.4
Backfilling
Backfilling to be carried out around the
structures in 250 mm thick layers with approved fill material. Compaction will be done by jumping rammers /
rollers / plate compactors as required to achieve the required minimum of 95%
MDD. Moisture content of the fill will
be maintained within +/-3% of Optimum Moisture Content to achieve compaction
requirement as per Clause 3.5 of QCS Section 12 Part 3.
The density of any layer requiring compaction
shall be determined in accordance with the specifications at a minimum rate of
one test per 100 meter run or 500 meter square, whichever is less.
The oven drying of soil and aggregates samples
for testing shall not be carried out at a temperature in excess of 60° C and
100° C respectively.
The minimum frequency of density testing shall
be 1 test per 500 m2 of prepared area or tests shall be carried out as directed
by the Engineer.
8.5
Disposal of Materials
Excavated
materials will be stockpiled on a designated place as agreed with the Engineer.
Suitable material arising from the excavation shall
be screened and used for backfilling.
Unsuitable excavated material shall be disposed to an approved
Government tip off location.
9. TRAINING
Relevant
trainings and orientations have been provided to person who will perform their
specified task.
10. WORKING
HOURS
The
working hours will be from 6:00AM to 6:00PM as agreed, with break time in
between.
11. HOUSE
KEEPING
Working Areas will be kept
clean by disposing the waste materials at the designated areas. At the end of
days’ work, installation supervisor will ensure that the debris are
disposed off.
12. MAN
POWER REQUIREMENT
Foreman
Laborers
Operators
13. PLANT
& EQUIPMENT REQUIREMENT
Excavator/Backhoe
Dump truck
14. QC
APPROVAL AND OTHER DOCUMENTRY REQUIREMENTS:
Follow approved Method
Statement, ITP, QCP, HSE Plan, Material Approval & Checklist.
15. SUPPORTING
DOCUMENTATION:
This MS to be read in
conjunction with the below referenced documents
·
Contract
Specification & approved drawings.
·
Project
Quality Plan
·
Project
HSE Plan
16. DISTRIBUTION
Copies of this MS will be
circulated to the following for Information & action
·
Project
Manager
·
Site
Engineer
·
QA/QC
Engineer
·
HSE
Engineer
17. OTHER
INFORMATION
Ensure that all the activities have been carried out
to suit the site conditions and involved
With
Site –in – charge
18. MAIN
CONTRACTORS SAFETY ENGINEERS APPROVAL
APPROVAL
STATUS
|
SIGNATURE
|
|
Approved
|
||
Approved
subject to compliance with the following notes
|
||
Not
Approved – with reason
|
||
19. ATTACHMENTS
(Compulsory)
Risk
Assessment
Inspection
& Test Plan
Quality
Control Check Lists
PROCEDURE FOR CONDUCTING PLATE LOAD TEST
PROCEDURE
FOR CONDUCTING PLATE LOAD TEST
Type of Test: Plate Load Test
Date of Test: 31.01.11
Dimensions of
Foundation/ Test Pit:
Area of Pit: 1.0m
X 1.0m
Depth of Pit
below existing ground level: 0.75m
Dimensions of Plate
for Plate Load Test:
Area: 0.45m X
0.45m
Thickness:
0.025m
Test
Arrangements
1.
Foundation Pit shall
be excavated up to a test pit depth of 0.75m.
2.
Test plate of
given size of 0.45m X 0.45m and 0.025m thickness shall be placed on the
prepared sub-base with provisions of 02 dial gauges to note the settlements
with least accuracy count of 0.01mm.
3.
Bearing plate is
placed on the test plate over which hydraulic jack is located.
4.
Another bearing
plate is placed over hydraulic jack which act as load transferring media.
5.
Further, the
system is loaded with point load pattern so that the net load in punching is
applied on to the plate without any eccentricity. Point load can be a loaded
excavator or loaded lorry or kentledge system, etc.
Loading Criterion
1.
Load is increased in
increments of 25% of the ultimate load carrying capacity until it reaches the
ultimate load intensity (ultimate load intensity is either given or assumed) or
the total settlement of the plate is 25mm or the soil under the plate fails
whichever occurs earlier.
2.
Settlement of the plate
is recorded by dial gauges of minimum accuracy of 0.01mm fixed at diametrically
opposite ends.
Unloading to check Rebound
1. Entire load is removed quickly but gradually and
the plate is allowed to rebound when no further rebound occurs or the rate of
rebound becomes negligible the reading of the dial gauges are again noted.
Results
1.
From the data obtained
during cyclic plate load test, the elastic rebound of the plate corresponding
to each intensity of loading is plotted. The settlements of the foundation
pertaining to the particular load intensities are computed along with plots.
SAMPLE OF STAIR PICTURE..
Although stairs are not part of the structural
load bearing frame, they affect and they are affected by its behavior
especially when horizontal loading is applied, mainly due to seismic actions
If the staircases are
both properly placed in the structure’s plan and properly constructed they may
even enhance the structure’s antiseismic behavior.
Thursday, October 23, 2014
23 Incredibly Successful People Who Failed At First!
Rejection can feel devastating, but you shouldn't let it crush you. Some of the world's most successful people have failed — sometimes more than once.
We've put together a list of highly successful people, from movie stars to scientists, who experienced massive failure before they found fame and fortune.
Weaker people might have given up. Instead, these folks remained focused on their goals.
Scroll down to see the underdogs who went on to change the world.
Winston Churchill was estranged from his political party over ideological disagreements during the "wilderness years" of 1929 to 1939.
At the outbreak of World War II on Sep. 3, 1939, Churchill was appointed to the British Admiralty, thus ending his "exile." The next year, he was elected prime minister at the age of 62.
Read more: http://www.businessinsider.com/successful-people-who-failed-at-first-2014-3?op=1#ixzz3GxvuAs5X
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