the design tool for civil engineering projects – an overview
DESCRIPTION
The Design Tool for Civil Engineering projects – an overview. Phil Birch & Susan Steensma Cyril Sweett 22-09-10. Aim of training session. Discuss the background to the ‘Designing out Waste’ (DoW) process; Explain the role of the tool in helping DoW; - PowerPoint PPT PresentationTRANSCRIPT
The Design Tool for Civil Engineering projects – an overview
Phil Birch & Susan SteensmaCyril Sweett
22-09-10
Aim of training session
Discuss the background to the ‘Designing out Waste’ (DoW) process;
Explain the role of the tool in helping DoW;
Demonstrate how to use the DoW Tool for Civil Engineering projects (DoWT-CE).
Agenda
Introduction What is ‘Designing out Waste (DoW)?’ Summary of the tool Example inputs and outputs User guidance Design guidance for Civil Engineering projects The tool in use Q + A
What do you want to achieve today?
What is ‘Designing out Waste’ and why is it important?
Background
Objectives Benefits of designing out waste
Principles of designing out waste
Designing out waste process
Design guidance and tools
Why take action?
Materials resource efficiency
Landfill tax
Site waste management plans
Environmental assessment
Client benefits
Waste Hierarchy
The role of Designing out Waste in the overall design and construction process
Supply chain interfaces
Pre-construction
Outline design
Detailed design
Construction
Post-construction
Tendering & appointment
Prevent waste
Forecast wasteReduce wasteIncrease RC
Waste reductionWaste recovery
Measure performance
Review performanceBenchmarking
Model wording
Net Waste Tool
Designing out waste
tools/guidance
SWMP TrackerReporting Portal
SW
MP
Tem
pla
te
The principles of ‘Designing out Waste’
Principles of Designing out Waste
Design for:
1. Reuse and recovery
2. Off site construction
3. Material optimisation
4. Waste efficient procurement
5. Deconstruction & flexibility
Design guidance for civil engineering projects
The design solutions provided within the tool are in-line with the recommendations in the Design guide
Use the guide to evaluate options
The Designing out Waste Tool for Civil Engineering projects (DoWT-CE)
DoWT-CEUsers: Design team – Civil engineer
When: Option preparation and design development stages
Inputs: Project elements and approximate dimensions Design team thinking on options to design out waste
Outputs:Tabulated reports on the impact of design solutions on project costs, materials requirement, wastage and embodied carbon
Cost:
A short amount of time is needed to complete the analysis (depending on the project complexity)
The tool is free to use
Benefits:
Helps to identify opportunities to reduce the need for imported materials, minimise wastage and achieve cost savings
Can be used for options appraisal by comparing different projects scenarios
Provides input for the project’s SWMP Users can include potential savings in tender specification so that
tender prices can take account of design decisions Results can be used to demonstrate responsibility
Designing out waste process
Design review workshop
Decide on actions to reduce waste through design
SWMP
Record indicative waste forecast and waste prevention actions
Design tool
Produce an indicative waste forecast
Design tool
Enter actions and calculate impacts
Example – Headline resultsThe engineer used the DoWT-CE to:• Identify opportunities to Design out Waste• understand the cost of waste• set actions to reduce waste arisings• increase the recovery of waste
Waste arisings
(t)
Waste to landfill (t)
Loss of embodied
CO2 (t)
Recycled content
CO2 from transport
(t)
Baseline 10,911 5,455 208 1% 236
Good practice 5,454 2,727 104 36% n/a
Projected performance 10,845 5,422 117 35% 236
Targeted improvement 66 33 91 34% 0
Explanation of data hierarchy
Element – A fundamental aspect of civil engineering i.e. earthworks/drainage/etc
Sub Element – An aspect of an element i.e. a type of drainage option
Component – Sub elements comprise of a number of components. For example drainage options would consist of pipe, bedding, top soil etc (all of which are
components)
DoWT-CE – hands on
User guidance
Quick start guide
Brochure
Dataset
User guide
User process
1) Build project2) Produce baseline results3) Investigate opportunities for DoW4) Assess impact5) Record actions
Designing out waste process
Design review workshop
Decide on actions to reduce waste through design
SWMP
Record indicative waste forecast and waste prevention actions
Design tool
Produce an indicative waste forecast
Design tool
Enter actions and calculate impacts
Design tool
Produce an indicative waste forecast
Access the tool at:
http://dowtce.wrap.org.uk/
Title page
Registration
‘My projects’
‘Project details’
User journey – Project builder
1
23
4 5
Designing out waste process
Design review workshop
Decide on actions to reduce waste through design
SWMP
Record indicative waste forecast and waste prevention actions
Design tool
Produce an indicative waste forecast
Design tool
Enter actions and calculate impacts
Design review workshop
Decide on actions to reduce waste through design
Design guidance for civil engineering projects
The design solutions provided within the tool are in-line with the recommendations in the Design guide
Use the guide to evaluate options
Designing out waste process
Design review workshop
Decide on actions to reduce waste through design
SWMP
Record indicative waste forecast and waste prevention actions
Design tool
Produce an indicative waste forecast
Design tool
Enter actions and calculate impacts
Design tool
Enter actions and calculate impacts
User journey – Solutions and impacts
1 2 3
4
5
6
7
8
Reporting
Designing out waste process
Design review workshop
Decide on actions to reduce waste through design
SWMP
Record indicative waste forecast and waste prevention actions
Design tool
Produce an indicative waste forecast
Design tool
Enter actions and calculate impacts
SWMP
Record indicative waste forecast and waste prevention actions
Sketches of examples
Highways
Highway
Footpath
Footpath
Embankment + nailing Cutting + wall
Cutting + wallEmbankment stabilisedEmbwall
10 x gulleys
Filter drain
Filter drain
100 400 300
500
2
2
10
H=4
H=1.5
H=4
H=1.5
H=4
1,000
300H=4
Sketches of examples
Streetworks
Road
Footpath
Square
Footpath
30
10
6
3
200
3
170
Cutting 1:2 Pre Cast Concrete retaining wall
Cutting 1:3
Traditional front wall platform
Traditional front wall platform
Track on concrete sleepers
Track on concrete sleepers
Filter drain
Filter drain
Structural stee
l bridge
RC foundation
RC foundation
RC foundation
Sketches of examplesRailways
Q&A