The Scenario Client: The Christmas Empire Development: The - - PowerPoint PPT Presentation

10/27/2009 1

doka

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The Scenario

• Client: The Christmas Empire
• Development: The Christmas Tree

– Building is in the shape of a “cone” – Vital statistics

• Type of development: Shopping mall and office
• Number of storey: 30

y

• Height of building: 125m
• Location: Waterfront, at CBD area
• Expected opening date: 24th December 2011

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The Scenario

• Constraints on core wall construction

– Unconventional building shape – Limited space on‐site

• Surrounded by existing buildings

– Only one/no tower crane can be deployed – High wind‐speed g p – Tight construction schedule

• specific date to be met – strictly no delays allowed!

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Overview

• About us
• Features of SKE 50 Plus
• How it works
• Why Doka?
• Case study
• Conclusion

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Doka – The Formwork Experts

• More than 130 years experience, puts the

d d bilit f t i d d t t d f k dependability of tried‐and‐tested formworks concepts in place on each of your construction sites

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Doka around the world

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109 Subsidiaries and 18 Representatives in more than 60 countries

Revenue bar graphs

823

[+19%] [+5%] [+13%]

414 469

[+19%]

556 394

[+8%]

690

[+24%] [+19%]

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Consolidated revenues 2002 – 2007 (mill. EUR)

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SKE 50 Plus

• Crane‐independent

li bi f k climbing formwork

• All shape and heights
• Ideal solution for any type
• f structure

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Features of SKE 50 Plus

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SKE 50 Plus - Key figures

Drive Hydraulically Loading capacity 50kN Pouring height 2,7 m - 5,5 m

• Max. wind speed during

climbing 72 km/h Climbing speed 5 min/m I li ti Inclination +/- 15 degrees Wall system Large-area formwork Top 50 Framed formwork

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SKE 50 Plus - Components platform system

A A ... Pouring platform B ... Wall formwork C ... Working platform D ... Climbing profile E ... Suspension platform B C D E E

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With just a remote control...

The system is lifted!

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Hydraulic equipments…

Hydraulic cylinder 24 Hydraulic hose SKE 6,50m Line distributor S, & M Hydraulic unit Pipe clamp

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Integrated ladder Ladder to access different platform

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How SKE 50 Plus works?

• 1. Pouring first step
• 2. Pouring second step
• 3. First hydraulic climbing

4 P i thi d t

• 4. Pouring third step

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• 1. Pouring first step

Place formwork Assemble positioning Assemble positioning points Reinforcement Pour concrete

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How SKE 50 Plus works?

• 1. Pouring first step
• 2. Pouring second step
• 3. First hydraulic climbing

4 P i thi d t

• 4. Pouring third step

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• 2. Pouring second step

Mount upper suspension shoes shoes Fix climbing scaffold Place formwork climbing scaffold

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How SKE 50 Plus works?

• 1. Pouring first step
• 2. Pouring second step
• 3. First hydraulic climbing

4 P i thi d t

• 4. Pouring third step

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• 3. First hydraulic climbing

Open formwork Clean formwork and platforms p Assemble upper suspension shoe Fix climbing profile

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• 3. First hydraulic climbing

Hydraulic lifting of climbing profile Disassemble lower i h suspension shoe Lifting of scaffold together with formwork

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How SKE 50 Plus works?

• 1. Pouring first step
• 2. Pouring second step
• 3. First hydraulic climbing

4 P i thi d t

• 4. Pouring third step

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• 4. Pouring third step

Fix suspension platforms Place formwork on one side Place formwork on one side Assemble positioning points Reinforcement Close formwork Pour 3rd step 3 p

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The process cycle The process cycle continues for the successive walls…

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Dismantling of SKE 50 Plus

• Use of tower crane
• Time required: 2/3 of its assembling time

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Limitation of Jumpform

• 1 unit of jumpform can only be lifted by crane

t ti at a time

– significant crane time is needed to lift all the units

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Comparisons

Jumpform Automatic climbing formwork

Flexibility of formwork Little Improved: ‐ height adaptability of suspended g p y p platform ‐ formwork is retractable 1m for

• perating comfort

‐ Adjustable width, enclosed on all sides Loading it Vary among diff t t 50kN capacity different types Pre‐assembly Low level High level: wall formwork, working and suspension platforms

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Comparisons

Jumpform Automatic Climbing formwork

Drive Crane Hydraulically Lifting

• peration

Requires coordination between the crane operator and workers at the point of installation Little coordination is needed with remote control Lifting capacity Restricted to one unit lifted at once by a crane Many platform units can be lifted at the same time: commonly 20 units Weather Positioning by crane is Unaffected by wind speed of up to Weather conditions Positioning by crane is restricted by wind speed Unaffected by wind speed of up to 72km/h since it is anchored to the structure in every situation

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Benefits of Doka Formwork

• Leverage on the expertise of Doka
• Flexibility
• Flexibility
• Independence of Crane
• Cost efficiency – reduction in

– Manpower – Equipment – Time

• Cost Analysis
• Safety

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Leverage on Expertise of Doka

• A team of experts at

Doka to provide engineered solutions

– Maximization of value added services

• Pre‐assembled custom

formwork formwork

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Flexibility

• Usable for different forms,

h d h i ht shapes and height

– Unlimited height – Able to incline up to +/‐ 15o

• Examples:

– Tallest building: Burj Dubai Sl d b ildi C i l G – Slanted building: Capital Gate

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Independence of Cranes

• Reduce dependency where..

– Areas not within the reach of the crane – Unavailability of cranes due to space constraints – Better usage of cranes for

• ther purposes

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Cost Efficiency – Manpower

• Hydraulic Lifting reduces

manpower needed to hoist and position

Reduces the direct cost of

manpower

Manpower can be deployed for

• ther work processes
• ther work processes

E.g. no need for manpower to

• perate the crane and position

the formwork

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Cost Efficiency – Equipments

• Hydraulic Lifting reduces the need

for crane

Maximizes the opportunity

cost of crane usage

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Cost Efficiency – Time

• Process of each cycle of core wall construction

made simpler made simpler

• Able to lift 20 units simultaneously unlike

Jumpform ‐ lift 1 formwork at a time

• Therefore….

Overall cycle time is shorter Overall cycle time is shorter

Shorter time – less indirect cost Incentives may be given if project is completed earlier

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Cost Analysis

Fixed Cost Construction Cost Structural (≈ 33.33%) (≈ 65%) Variable Cost (≈ 35%) M&E Services (≈ 33.33%)

Fixed cost:

Architectural Works (≈ 33.33%)

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Fixed cost: Materials including concrete, rebar, formwork Variable cost: Workers, rental, operations

• verheads

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Cost Analysis

Fixed Cost Construction Cost (e.g. $100M) Structural (≈ $33M) (≈ $21.45M) Variable Cost (≈ $11.55M) M&E Services (≈ $33M)

Fixed cost:

Architectural Works (≈ $33M)

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Fixed cost: Materials including concrete, rebar, formwork Variable cost: Workers, rental, operations

• verheads

Cost Analysis

• Variable cost of $11.55M
• For example, it takes one year to complete the

construction of the structural component,

– The variable cost per day = $11.55M / 365 days ≈ $32,000

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If we can reduce the time taken to construct the core wall, we could save a significant amount of money in terms of variable cost!

More benefits with Doka

Because…

M j tit lift h l it t

Major competitors – lift much lesser units at a

time

• More time required to relocate the

hydraulic unit for each lifting cycle

• Alternatively, if hire more hydraulic units

to lift all units at the same time, additional cost incurred

• More space taken up by hydraulic units

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Worksite Accidents

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Worksite Accidents

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Worksite Accidents

MOM and WSHC (2009). Workplace Safety and Health Statistics Report Jan to Jun 2009.

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Worksite Accidents

• From the WSH Statistics Report Jan to Jun

2009 2009,

– 3 in 10 of the fatalities were involved in a fall from height – 20% were struck by falling objects – Crane lifting operations account for more than half of the “struck by falling objects” cases

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Safety features of SKE 50

• Maximum safety

throughout all phases

A C B

– Climbing unit is always anchored in the concrete – Hydraulic jacks

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Safety features of SKE 50

– wide working platforms

TOP 50

• Maximum safety throughout all phases

Width of walking ways …

– Comfortable width of walk ways

L0 L‐1

2,45m 2,70m 1,85m

L‐2 L‐1

…0,80 m …0,50 m …1,00m …0,80m …0,50m

L0 L‐2

1,15m 50

Safety features of SKE 50

• Maximum safety throughout all phases

– Height of handrail post ( up to 2m) – Available of net housing and full housing for protection

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Safety features of SKE 50

• Maximum safety throughout all phases

– wider working between wall and formwork

1 00

– Load capacity of 50 kN

1,00m 1,00m

Reinforcement Shoe assembly

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Safety features of SKE 50

• Independence from the weather

conditions – Large formwork assemblies can be lifted up without the need for crane – work can still proceed safely under high wind as it climbs higher up to wind speeds of 72km/h – Work can still proceed safely under bad weather conditions such as rain.

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Case study

Ocean Financial Centre, Singapore Capital Gate Tower, Dubai

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Case Study : Ocean Financial Center

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Project data :

• Type of Building : Office Building
• Location: Raffles Place, Singapore
• Commencement of construction: April,

2009

• Construction duration: approx 2

Construction duration: approx. 2 years

• Year of completion: 2011

Building Data:

• Total Height of Structure :

240m

• Number of floors:

43

• Forming systems:

Automatic Climbing Formwork Xclimb60 for core wall

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Building data

Self-climbing system Xclimb 60 Concrete Placing Boom SKE100 + MX 32-4 Multi Self-climbing system Xclimb 60 Protection screen Xclimb 60

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Close proximity to adjacent buildings Busy main roads in close proximity

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Observations from site visit

• Confined site

Adj t b ildi – Adjacent buildings – Busy main roads – 2 Tower cranes within building

• Construction duration

– Short construction duration of approximately one year – Overhead cost in CBD area is expensive hence important to shorten the duration

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Solution

Automatic climbing system

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Case Study – Capital Gate Tower “Leaning Tower of Abu Leaning Tower of Abu Dhabi”

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• Project data :
• Type of Building : Executive 5‐star

hotel

• Location: Abu Dhabi; Dubai
• Construction duration: Quarter 3

2007 to Quarter 4 2009 2007 to Quarter 4 2009

• Year of completion: End of 2009
• Building Data:
• Total Height of Structure : 165 m
• Number of floors: 35 storey

y

• Forming systems:

Automatic Climbing Formwork SKE 50 for corewall

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Project Background

• Leaning Tower of Pisa is “only”

four degrees out of the vertical four degrees out of the vertical, Capital Gate is inclined by a massive 18 degrees

• Central concrete core is

characterised by an elliptical layout

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layout

– 78 units of the powerful SKE 50 are in service

Why Doka SKE 50?

• Able to form, reinforce and pour one casting

section every week section every week

• 42 casting sections are being carried out with

no change of form‐facing.

• Up to 30 climbing brackets can be raised at a

time

• platforms are completely pre‐assembled, and

set up under supervision of an experienced field service technician.

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• … opted for an automatic climbing formwork from
• Doka. As well as Al Habtoor’s very satisfactory

experience on past projects, the main deciding factors here were the technically convincing formwork solution and the comprehensive package

• f services designed to optimise all phases of the

forming operations.

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Main contractors Al Habtoor Engineering Enterprises Co. LLC.

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“Doka has fulfilled the tough requirements for this formwork assignment to our complete

• satisfaction. In particular, it was the detailed

planning of the forming operations the planning of the forming operations, the comprehensive oversight provided during the shell construction phase and the high safety standard of the automatic climbing formwork that convinced us”

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Mohammad F. Zakaria, Acting Project Director, ADNEC Phase 3 Capital Gate

Are these bothering you?

High wind speed? Want potential cost saving?

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Want potential cost saving?

Make the smart choice NOW!

Doka Automatic Climbing Automatic Climbing Formwork!

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Acknowledges and special thanks

• This project would not be possible without the

support rendered by Doka Formwork Pte Ltd support rendered by Doka Formwork Pte Ltd, Singapore

• Special thanks to:

– Managing Director, Mr Josef Palme – Technical Director, Mr Michael Eder – Sales Director, Mr TG Lim – Office Manager, Ms Christin Koh

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Mount upper suspension shoe

Component: Suspension shoe:

Embedded in concrete C

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Cone Suspension shoe

Mount upper suspension shoe

Shoe assembly

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Fixing of suspension platforms

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Open formwork

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Hydraulic lifting of climbing profile

Position control lever to “profile”

• 2. Working stroke

A ... Pawl B ... Openings in the climbing profile SKE 50 pl.

• 1. Unfilled stroke

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Lifting of scaffold together with formwork

Position control lever to “platform”

• 2. Unfilled stroke
• 1. Working stroke

A ... Pawl B ... Openings in the climbing profile SKE 50 pl.

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Placing reinforcement

1.00m

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