PROPOSED: METHOD STATEMENT FOR BI-DIRECTIONAL STATIC … · PROPOSED: METHOD STATEMENT FOR BI-DIRECTIONAL STATIC LOAD TEST (BDSLT) (Working Piles – 1200mm Diameter) Prepared for:
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PROPOSED:
METHOD STATEMENT
FOR
BI-DIRECTIONAL STATIC LOAD TEST (BDSLT)
(Working Piles – 1200mm Diameter)
Prepared for:
Prepared by: Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou,
310015, P.R. China
Tel: 86-571-28993135 Fax: 86-571-28993137
Email: Tracytong@ougangroup.com
www.ougangroup.com
Date Submission Ref. Revision Prepared by
2015-11-11 SF071015 2.00
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
1
CONTENTS
1. Introduction
1.1 Project Information
1.2 Test Objectives
1.3 Applicable Standard/References
2. Sub-surface Conditions
3. Bi-directional Static Load Test
3.1 Test Theory and Advantages
3.2 Test Instrumentations
3.3 Installation of Super Cell
3.4 Load Test Procedures
3.5 Loading & Unloading Sequence
3.6Test Results Analysis And Conclusion
4. Worksheet
4.1 Field Responsibilities
4.2 Equipment/materials and staff provided by contractor
5. Risk Assessment
Appendices
A. Test Pile Layout
B. Schematic Section of Test Pile & Reference pile/Reference Beam Layout
C. Super Cell Calibration Certificate Reference
D. Project References With Same Test Instrumentations
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
2
1. Introduction
1.1 Project Information
Four Bi-directional Static Load Tests will be applied to four bored piles at_. The details of these
four working test piles are as below:
Pile Ref. No. P147 P170 P255 P208
Borehole Log BH10 BH4 BH11 BH2
Pile Dia.(mm) 1200 1200 1200 1200
Qty 1 1 1 1
Cut-off Level(m) -7 -7 -7 -7
Pile Toe Level (m) -22 -22 -22 -22
Pile Effective Length
(m) 15 15 15 15
Max. Test Load(kN) 2.2×4500 1.5×4500 1.5×4500 1.5×4500
Super Cell Level (m) -19 -19 -19 -19
Pile Type Working test piles
Equilibrium Point Data Sheet
Project
Test Pile
Reference P147/P170/P255/P208
Load cell position 3m above pile toe
Pile
dia.(m) 1200
Pile length
(m) 15 Borehole No. BH10/BH4/BH11/BH2
Soil No.
Soil Description
Ultimate
Skin Friction
qsik (kPa)
Ultimate
end
bearing
qpk
(kPa)
Negative
friction
coefficient
a
Thickness Li
(m)
Vertical
qsik*Li
Skin friction
after correction
a*qsik*Li
1 Silty sand. Light brown,
very dense, dry. 80 0.80 8.5 680.0 2049.8
2
LEAN CLAY with
Sand.Dark brown to
grey, hard, dry.
90 0.80 1.8 162.0 488.3
3 Silty sand. Light brown,
very dense, dry. 75 0.80 1.7 127.5 384.3
Super cell
4 Silty sand. Light brown,
very dense, dry. 75 2000 1.00 3.0 225.0 847.8
Ultimate skin friction of upper pile
2922.5
Self-weight of upper pile
339.1
Ultimate uplift force of upper pile
3261.6
Ultimate skin friction of lower pile
847.8
Lower pile ultimate end bearing capacity
2260.8
Lower pile ultimate bearing capacity
3108.6
Load cell
level
Above pile
toe
3.0
Upper pile
length
12.0
Total pile
length
15.0
Note: Skin friction data and end bearing data is got according to experience.
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
3
1.2 Test Objectives
a. To determine the pile ultimate compression capacity
b. To verify related data in the geotechnical report
1.3 Applicable Standard/References
a. ASTM D1143: Standard Test Methods for Deep Foundations Under Static Axial Compressive Load
b. CP4: 2003-Singapore Standard Code of Practice for Foundation
c. BS8004: 1986-British Standard Code of Practice for Foundation
2. Sub-surface Conditions
P147 Borehole log
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
4
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
5
P170 Borehole log
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
6
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
7
P255 Borehole log
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
8
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
9
P208 Borehole log
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
10
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
11
3. Bi-directional Static Load Test (BDSLT)
3.1 Test Theory and Advantages
3.1.1 Theory of Load Cell Method
The BDSLT method of pile load test utilizes hydraulically operated Super-Cells embedded
inside the concrete of the pile. To determine the position of the cells the soil investigation
report has to be studied to work out the equilibrium point. The embedded Super-Cell is
specially designed using built in hydraulic jacks. Pressure is applied to the load cell by
hydraulic pump on the ground through the flexible hose embedded into the pile. The
pressure in the load cell is measured by pressure transducer and the displacements are
measured by displacement transducers which are connected to the load cell by telltale rod
embedded into the pile. When loaded the load cell expands, pushing the upper shaft upwards
and the lower shaft downwards, which would mobilize the side resistance and base
resistance of the upper and lower lengths of the pile. According to relationship between the
movement and their corresponding S-lgt and s-lgQ curves, bearing capacities of both upper
and lower portion of the pile can be determined. Adding up the modified side resistance of
upward pile shaft and the base resistance of downward pile shaft makes up the total ultimate
bearing capacity of the pile.
3.1.2 Advantages of Load Cell Test
a. High Test Load Capacity
Load cell capacity can be greater than 100MN and multiple cells can be used to test a pile,
increasing the test load capacity.
b. Improved Safety
No reaction system is required as for other static load test. No use of large quantities of
girder beams and concrete blocks which could topple if the base is not well prepared.
c. No Space or Access Problem
Load cell test can be performed next to existing buildings, under overpasses, highway
median strips and offshore, with much less space required compared to other static load
test.
d. Piles with Deep Cut Off Levels
For basement piles, test pile can be performed below ground, eliminating the pile extension
to ground level.
e. Test for Working Piles
With post test grouting techniques, testing of working piles can also be done.
f. Time Saving
Compared to static load test with test blocks, there is considerable time saving as no pile
built up or strip down is necessary.
3.2 Test Instrumentations
3.2.1 Super Cell
a. Ring Super Cells are applied to this project, max. stroke is 150mm. Super cell is provided with
built in hydraulic jack (s) and flexible hose fixed to the steel cage to connect to the oil pump
at ground level.
The super cells are calibrated to their rated capacity by the manufacturer. A sample Super
cell calibration certificate is included in Appendix C.
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
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Cone-shape flow-guiding mechanism
Ring Super Cell
3.2.2 High Pressure Pump
The maximum pressure of the pump is 60Mpa, with gauge scale precision up to 0.5Mpa.
3.2.3 Electronic Displacement Transducer
Stroke: 50mm.The electronic displacement transducers are fixed onto the reference beam by
magnetic means, each test pile is equipped with 6 electronic displacement transducers, two for
tracking the upward displacement of the top of the load cell, two for downward displacement
of the bottom of the load cell and two for pile top upward displacement.
Test Instrumentations Terminal Box
Test Instrumentations Display Screen
3.2.4 Telltale Casing and Rod Extensometer
Telltale casing OD is 32mm, rod extensometer OD is 18mm, they are embedded in the pile.
3.2.5 Test Instrumentation List
Instrument Quantity
Super cell 4
Electronic Displacement Transducer 6
Automatic Data Acquisition System 1
Pressure Gauge 1
High Pressure Hydraulic Pump 1
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
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3.3 Installatoin of Super Cell
3.3.1 Site Work
a. Precast Concrete:
i. Super Cell is put on even ground with cone-shape mechanism upwards. Special material
should be put under the super cell to prevent super cell from bonding to ground;
ii. After pouring of concrete into cone-shape mechanism, vibrating spear is used to tamp; the
concrete strength should be no less than pile shaft concrete strength;
iii. Super Cell couldn’t be removed within 10 hours after cast;
b. Weld the super cell to reinforcing cage
i. Lift by crane, the square steels or reinforcing ribs(fabricated on site) of the precast super cell
would be welded to the main reinforcement of reinforcing cage; reinforcing cage should
keep vertical to super cell, eccentricity should be less than 5°;
ii. Weld the funnel reinforcement to cage, quantity is same as main rebar. Φ20 steel rod in 1.2m
length at least each is used as funnel reinforcement, and it is required to weld both above and
below the super cell.
iii. Increase the hooping qty of reinforcing cage within 1m above and below the super cell, the
distance of each hooping/spiral is around 10cm;
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
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Installation on site 1
Installation on site 2
c. Pipeline arrangement on site
i. Telltale device: Rod extensometer with telltale casing is used.
ii. Hydraulic hoses: they are tied above super cell and could be released when lowering the
reinforcing cage.
iii. Lower reinforcing cage: Telltale casing and hydraulic hoses should be tied to reinforcing cage
and extended to ground; Telltale casing is tied to cage every 2m, and hydraulic hose is tied to
cage every 1m. Pls ensure the verticality of the telltale casing and protect it from damage.
iv. Protect pile heads after pile cast:
The interval time between installation and testing should be at least 7days; Clear warning sign
should be marked on the pile head to avoid damage to pipelines.
Warning sign 1
Warning sign 2
3.4 Load Test Procedures
3.4.1. Minimum 7 days after casting of the test pile, send concrete test cubes for compression test.
When the concrete compressive strength is not lower than 80% of design mix strength, the
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
15
load test can be conducted.
3.4.2. Level the ground surrounding the test pile and put up an 8m length reference beam about
1m above ground over the test pile. Provide metal frame and canvas sheet over the reference
beam to form a space of 6m×4m to protect the test equipment from weather and dust. Dial
gauges with electronic displacement transducers are fixed onto the reference beam to record
displacements of the load-cell.
3.4.3. Bring in an 8’ ×10’ metal container or suitable equivalent with suitable space heater for test
equipments, including hydraulic pump with pressure gauges, computer and data collector.
3.4.4. Carry out loading and unloading to the test pile according to the attached sequence, the
upward & downward displacements against applied loads would be shown on the computer
screen. Test can be ended once either one of below situations happen:
a. The max. stroke of load cell is reached (150mm);
b. The test load has been applied;
c. The max. rated load of cell is reached;
d. Capacity of the pile above or below the Super-cell location has been reached.
Test site 1
Test site 2
3.4.5. Post Load Test Grouting
After testing, annual space between the upper pile shaft and top surface of the bottom of load
cell needs to be grouted, and strength of grouting body should be no lower than pile shaft design
capacity:
a. clean the grouting pipe(downward telltale rod) with high pressure water, water is pumped
into pipe from one pipe, when dirty water become clean flowing out from the other pipe,
grouting can be conducted.
b. the water cement ratio of grout is 0.5~0.6, adding 7% expanding agent and 1% water
reducer, cement is Po425.
c. grouting could be considered completed when grout flow out from the other pipe. Then
seal pipe top to grout under 2-4MPa pressure for 1 hour. Grouting cement amount is
around 0.3~0.8t (double control with pressure and grout amount)
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
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d. the grout strength should be no lower than pile shaft concrete strength.
Grouting whole process should be supervised and recorded, and controlled subject to above 4
requirements strictly.
3.5 Loading & Unloading Sequence
Working Load Test (1.5 Times Working Load)-Loading & Unloading Sequence
Date Time % of Working
Load
Minimum
Holding Time
Day 1
0900
1000
1100
1200
1300
1320
1340
1400
1500
1600
1700
1800
1900
1920
1940
25
50
75
100
75
50
25
0
50
100
125
150
100
50
0
1 hour
1 hour
1 hour
1 hours
20mins
20mins
20mins
1 hour
1 hour
1 hour
1 hour
1 hour
20mins
20mins
1 hour
3.6 Test Results Analysis And Conclusion
3.6.1 Introduction
The measurement of the pile bearing capacity with bi-directional static load test method has
great superiority. Compared with the traditional method of static loading test, it can be
replaced completely from the angle of implication. The traditional static loading test is the
basic and most reliable method because of its similarity to the practical in load transfer, pile
soil interaction. There is only one load-deformation curve for single pile in the traditional
load testing which has two curves including upward and downward in self-balancing method.
Hence, equivalent conversion should be made and this is the core why it can be applied
widely.
The load case divides the pile into two parts. We should analyze the load transfer mechanism
separately. For the lower part, it seems to be similar to the traditional load testing in load
transfer. The upward shear stress was generated around the layer of upper pile under the
force of load cell which was set in the pile. Therefore, it decreases the effective self-weight
stress of the soil above the lower pile. The stress field is different from that of traditional
load test. For the upper part, the pile holds the negative friction resistance which is different
from that of pulling resistance pile because of the action position of uplift force. So we
cannot consider the distribution of the friction resistance equal with that generated by the
pulling resistance pile. Moreover, it will be more complex considering the influence of each
other.
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
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We can get two load deformation curves from self-balancing test while there is only one
load deformation curve in traditional load test. In order to equivalently switch the result of
self-balancing into normal, we should firstly compare both the bearing mechanism so that
we can find the law of conversion, secondly, the bearing capacity and subsidence value
which get from the self-balance test should accord with the reality of project for control the
error. The key to these problems is doing enough comparison tests. See figure 4-2.
3.6.2 Equivalent Conversion Method
E.0.1: To convert two Q-S curves of upward and downward from Bi-directional static load
test into a Q-S curve of traditional load-deformation, to get pile top settlement, as shown by
E.0.1.
(a)Bi-directional load test curve (b)Equivalent conversion curve
E.0.1. Conversion curve of load-deformation
E.0.2 The Conversion is subject to the following assumptions:
1 Pile is elastomer;
2 Test pile is evenly divided into upper and lower parts, by the section of load cell;
3 The displacement of lower part of a bi-directional load tested pile equals that of a
compression pile after converted;
4 the relations of pile end bearing capacity vs settlement and skin friction resistance vs
displacement value in a bi-directional load test are the same as that in a conventional
top-down static load test;
5 Upper pile compression △s is equal to the sum of elastic compression caused by upper pile
base and side:
△s=△s1+△s2 (E.0.2-1)
△s1---elastic compression caused by the vertical load of the upper pressed pile;
△s2--- elastic compression caused by friction resistance of the upper pressed pile;
6 An average of skin friction resistance is applied to calculate the upper pile elastic
compression △s2 ;
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
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7 Unit strain could be calculated by the upward and downward unit strain as well as average
sectional stiffness;
E.0.3 Calculation without strain gauges should conform to below provisions:
1 According to the assumptions of item 5,6 in the appendix E.0.2:
2 According to item 3 of assumption in Appendix E.0.2 the equivalent pile top load Q
corresponding to pile top displacement:
in which:sdcan be measured directly,△s can be calculated;γ is referred to the same
meaning as mentioned before.
3.6.3 Test Report
At the end of the test, report would be produced to include:
a. Detailed description of instrumentation, measurement and testing procedure.
b.Tabulated and graphical presentations of the test results, including the Q-S curve,
loading/unloading curve and detailed test data.
c. Recommended vertical ultimate bearing capacity of the test pile
d. General report of the test pile project including the comprehensive analysis of the test
results.
4. Worksheet
4.1. Field Responsibilities
No. Description Provider
1
Equipment required on jobsite, such as welding
machine, torches and consumables, crane/lifting
equipment.
Contractor to provide
2
2 welders and helpers as required to complete the
tasks in a timely way to contractors satisfaction
under Ougan supervision.
Contractor to provide
3 Insurance of all Ougan staff whilst on site or
travelling to and from the job site Contractor to provide
4 Precast cone-shape flow-guiding mechanism Contractor to provide re-
quired concrete and pre-
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
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cast under Ougan’s su-
pervision.
5 Supply and Fix the tell-tale casing and rod,
Fix the hydraulic hose.
Contractor to do it under
Ougan’s supervision
6 Weld super cell assembly to reinforcing cage Contractor to do welding
under Ougan’s supervision
7 All rebar or other materials required to prepare
suitable tremie pipe guide funnel.
Contractor to provide re-
quired material and manu-
facture in the field under
Ougan’s supervision
8
Provide and setup suitable stable reference beam(s)
as required to ensure good reference point.
Concrete blocks to support the beam(s)
Contractor do it under Ougan's
supervision
9 Set up a shelter above test pile after installation Contractor will set up
10 Site security, dry and level platform area around test
pile. Contractor will do it
11 Test equipment set up in the field Ougan do it
12 Field testing
Ougan do testing, but
contractor should ensure
working conditions such as
lighting, Generator/electricity
supply, air-conditioned shelter
etc.
13 Any required support during conduction of the test Contractor will do it
14 Disassembly of testing equipment Ougan will do it.
15 Grouting pipes with required length for working
piles Contractor provide
16 Jet grouting after test for working piles Contractor do it under
Ougan’s guidance.
4. 2 Equipment/materials and staff provided by contractor Equipment
Name Unit Qty Remark
Welding machine set 1 Welding super cell to rebar cage
Vibrating Spear set 1 To compact the concrete in cones
Cutting machine set 1
Crane set 1
For shifting the cells and locating in
to rebar cage; lowering rebar cage to
bored hole
Staff requirement
Stage Name Unit Qty Remark
Installation
Welder person 2
If 1 welding machine
was only for 1
welder, than we need
2 welding machines.
Strain gauges welding and
tying
person 3
Telltale casing and hydraulic
hoses tying when lowering
reinforcing cage
person
3
Pipelines protection on pile person 2
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
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head after installation
Testing
Level and clean testing
platform
person 2
Set up reference beam and
shelter
person 4 Crane is required
Welder person 2
Electrician person 1
Backman for testing person
1 Assistant of Ougan
engineer
Materials
Name Unit Qty/ Pile Application 32mm, thickness 3mm, steel tube m 4*20m=80m Telltale casing
20mm, thickness 3mm, steel tube m 4*20m=80m Telltale rod
20 steel rod m 40pcs*1m=40m Horn reinforcement
20 rebar m 6m Welding super cell to
reinforcing cage
20a I-beam pcs 8m Reference beam, reference piles
Concrete m3 0.3
Precast cone-shape flow-guiding
mechanism, in twice
5. Risk Assessment
RISK MATRIX AND RISK ACTIONS
Likelihood
Hazard
Severity Reputation Assets Environment People
A – Very
Unlikely (a freak
combination of
factors
required for incident to
result)
B –
Unlikely (a rare
combination
of factors would
be
required for an
incident to result)
C –
Possible (could
happen
when additional
factors are
present but otherwise
unlikely to occur)
D –
Likely (not certain
to
happen but an
additional
factor may result
in an accident)
E –
Very
Likely (almost
inevitable that an
incident
would result)
1. Slight Slight Impact Slight
damage
Little or no actual
or potential for
damage.
Slight
health
effect/injury
A1 B1 C1 D1 E1
2. Minor Limited Impact Minor
damage
Within site
boundary,
short term impact
recoverable by the
work site.
Minor
health
effect/injury
A2 B2 C2 D2 E2
3. Major Considerable
Impact
Major
damage
Beyond the site
boundary unlikely
to last beyond 1
month.
Recovery requires
external aid.
Major
health
effect/injury
A3 B3 C3 D3 E3
4. Severe National
Impact
Severe
damage
Beyond the site
boundary unlikely
to last beyond 12
months.
Recovery requires
external aid.
Permanent
Total
Disability
or single
fatality
A4 B4 C4 D4 E4
5.
Catastrophic
International
Impact
Extensive
damage
Massive
uncontrolled
release with
significant
impact extending
Multiple
serious
injuries or
fatalities
A5 B5 C5 D5 E5
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well beyond the
site boundary.
Green
(Low)
Acceptable (When risk reduction / control measures have been implemented). Ensure
controls are maintained and manage for continuous improvement.
Yellow
(Medium)
Tolerable (When risk reduction / control measures have been implemented). Where
possible, the work activity / task should be redefined to take account of the hazards
involved or the risk should be reduced further prior to task commencement.
Red
(High)
Intolerable (Work activity / task must not proceed). It should be redefined or further
control measures put in place to reduce risk. The controls should be re-assessed for
adequacy prior to task commencement.
RISK ASSESSMENT- SUPER CELL INSTALLATION
Job Steps Hazards
Initial
Risk
Rating
Control Measures
Residual
Risk
Rating
Risk
Action
Installation
works and
Discharging
Falling objects
during pick C4
Ensure that there are no objects left on
the cage/frame prior the pick. Ensure that
all pipes are securely tied to the
cage/frame. Keep distance when possible
and never stand under suspended loads.
Wear hard hats while working around
suspended loads. Signal man / watchman
shall be provided at site.
B3 Low
Burns, flash, spark,
fires
and airborne debris
C3
Be aware of hot surfaces from recent
welding and torch
cutting. Wear gloves and safety glasses /
welding screen.
Look away when welder is welding to
avoid flash. Keep a fire watch that has a
properly inspected fire extinguisher.
Provide fire blanket. Keep face out of
area where grinding is being performed.
Wear appropriate gloves and clothing
when applying grease. Dispose of soiled
gloves and clothing appropriately.
B2 Low
Getting Grease on
hands and body
C2
Do not apply grease until all welding and
cutting activities near the Super cell
breaking plane have been
completed.
A2 Low Grease catching on
fire from welding
and cutting
activities
Cuts, sharp edges
and burs C2
Be aware of hand placement. Wear
gloves . B1 Low
RISK ASSESSMENT- SUPER CELL TESTING
Job Steps Hazards Initial Risk
Rating Control Measures
Residual
Risk Rating
Risk
Action Super cell
testing Works
Cuts, sharps
edges C1
Be aware of hand placement. Wear
gloves. A1 Low
Electric shock. C3
Keep electricity and water separated
and above ground.
Don’t touch exposed wires or plugs.
B2 Low
Tripping on C1 Route instrument cables and electrical A1 Low
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Tel: 86-571-28223950 Fax: 86-571-28993137
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cables/wires cords so that tripping hazards are
minimised.
Working near
high pressure C3
Try and keep distance from pumps,
hydraulic hoses whenever possible to
minimize exposure.
Make sure all pump muffles are
functioning and in place.
B2 Low
High pressure
injection injury C4
Be sure to inspect all hydraulic hoses
for any possible damage that could
result in a pinhole type of a leak.
Try and keep distance from pumps,
hydraulic hoses whenever possible to
minimize exposure.
Make sure all pump muffles are
functioning and in place.
All connection shall be tightened and
checked.
B3 Low
RISK ASSESSMENT- GENERAL SITE SAFETY
Job Steps Hazards Initial Risk
Rating Control Measures
Residual
Risk Rating
Risk
Action General Site
Safety Open holes C4
Make sure all open holes are covered,
marked and surrounded by barricade.
Keep distance from opens holes
and be aware of their location.
B2 Low
Crane and drill
rig swing radius C4
Stay out of the swing radius. Make eye
contact with operator before entering
their work area. Signal man /
watchman shall be provided at site.
B2 Low
Slips, trips and
falls C3
Be aware of uneven ground. Practice
good housekeeping.
Communicate with foreman if house
keeping and site conditions become a
concern.
B1 Low
Fall into water C4 Keep lifebuoy on site, keep distance
from water. B2 Low
Note: We assume that the Site Main Contractor will complete site induction.
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
23
Appendix A
Test Pile Layout
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
24
Appendix B
Schematic Section of Test Pile & Reference Pile/Reference Beam Layout
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
25
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
26
Appendix C
Super Cell Calibration Certificate for Reference
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
27
Hangzhou Ougan Technology Co., Ltd
17th Floor, Wanda Plaza, Hangxing Rd, Gongshu District, Hangzhou, 310015, P.R. China
Tel: 86-571-28223950 Fax: 86-571-28993137
28
Appendix D
Part Project References With Same Test Instrumentations
Project Description Single Pile Test Load
(ton)
Pile Dia.
(m) Qty
Hong Kong-Zhuhai-Macao
Bridge 11000/14000 2.0/2.2 2 Pcs each
Macao Fai Chi Kei public
housing project 1920/820(tension pile) 1.0 1 pc each
Macao Hengqin Island
University of Macau new
campus subsea tunnel
630/1300/510
(tension pile) 1.2/1.5/1.2 6pcs
Social housing of Ilha Verde
Lote 3 1170 1.0 2pcs
Catholic High School At Bishan St22,
Singapore 650 0.8 2pcs
A 3-Storey Factory Extension at No.5
Tuas Lane, Singapore 1370 1.0 1pc
A 5-Storey Building at No.231A
Pandan Loop, Singapore 1450 0.9 1pc
Jiaxing - Shaoxing
River-Crossing Bridge 20500 3.8 1pc
Hangzhou Bay Bridge 7000 2.2 1pc
Beijing Ministry of Railways
Command and Control center 4000 2.0 3pcs
Highway-Railway Bridge over
Yellow River in Zhengzhou 4200 1.5 4pcs
Humen Bridge 20700/20000/11600 2.8/2.8/2.5 1pc each
Yangtze River Bridge in Anqing,
Anhui Province 1800 1.0 3pcs
Grand Bridge Over Yangtze
River in Wuhu, Anhui Province 12000 1.8 1pc
Hubei Province Danjiangkou
Han River Grand Bridge 5700 1.8 1pc
The Yellow River Bridge in
Shandong Juancheng 1200 1.0 2pcs
Shandong Yantai Fortune Center 2300 1.15 3pcs
Shandong Yantai Hengyue
Square 1400/700 1.8 1pc each
Liuzhou Diwang International
Fortune Center 9800/9040 2.5/2.4 2/1 pcs
Guangxi Nanning East Railway
Station 4000 1.4 4pcs
Guangxi Nanning Traffic police
complex 900 1.1 57pcs
Guizhou China Tobacco
Building 1000 1.0 3pcs
Jinlin Gymnasium in Sanmen,
Guangdong province
500
(tension pile) 1.0 2pcs
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