Permeable Pavement Design using PermCalc - ciria.com John Howe Chris Adcock ... •CIRIA SuDs Manual...

transcript

LANDFRM – Delivery of SuDS – standards, design criteria

and tools

29/03/12

John Howe - Brett

Permeable Pavement Design using

PermCalc

John Howe

Chris Adcock

Permeable Pavement Design

Of course we have considered SuDs – but, we can

easily demonstrate that it is more expensive

and tools

29/03/12

John Howe - Brett

• Extract from the National consultation

• If full compliance with the Standards would

necessitate the construction of a drainage

system that is more expensive than an

equivalent conventional design then full

compliance is not required, and instead the

drainage system must comply with the

standards to the greatest extent possible,

without exceeding the cost of the equivalent

conventional design.

and tools

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John Howe - Brett

• Who are you?

and tools

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John Howe - Brett

• How can you design cost effectively?

• How many of you have/can design cost

effective permeable pavements?

and tools

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John Howe - Brett

• Design Guides

• CIRIA SuDs Manual

• BS7533:13

• Interpave guidance

• Design options

• Interpave Guidance

–Edition 6

and tools

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John Howe - Brett

• Design options

• BS 7533:13:2009

Hydraulic design

• Determine what system is

suitable

• Quantity water storage

required

• Determine rainfall

• Determine discharge

requirements

• Allow for slopes

• Allow for temporary

access

Structural design

• Predict volume of traffic

• Evaluate the sub grade

strength (CBR design

value)

• Allow for temporary

access (DBM layer)

Select the greater permeable thickness

Overview of the design process

and tools

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John Howe - Brett

• Limitations of the BS7533:13/Interpave method

• Return period limited to 1:100 +20%

• Discharge rates limited to 7lt/sec/ha

• Need to re-calculate/correct for;

• additional non permeable areas, adjacent/roofs

• slopes

• CBR values less than 5%

• Replacing permeable sub base with non permeable DBM

• Checking thickness of remaining HBCGA when substituting with DBM

• Costs need to be calculated manually

• How do you produce a cost effective

permeable pavement design?

and tools

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John Howe - Brett

PermCalc

• The Brett PermCalc Calculator

and tools

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John Howe - Brett

PermCalc

• PermCalc Calculator

• Automates the Interpave/BS

methodology

• Produces costed design suggestions

• Very quick to undertake what if

scenarios

PermCalc

• PermCalc Calculator

• Populate Input document (as follows)

and tools

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John Howe - Brett

PermCalc

and tools

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John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

29/03/12

John Howe - Brett

PermCalc

and tools

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John Howe - Brett

PermCalc

and tools

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John Howe - Brett

PermCalc

and tools

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John Howe - Brett

PermCalc

and tools

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John Howe - Brett

PermCalc

• PermCalc – calculate

• Generates “Out Put” document (pdf)

–Determines the pavement structure

• Pavement later thicknesses

• Pavement material types

–Provides appropriate cross section

–Bill of Quantities

–Summary input data

and tools

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John Howe - Brett

PermCalc

and tools

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John Howe - Brett

PermCalc

and tools

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John Howe - Brett

PermCalc

and tools

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John Howe - Brett

PermCalc

and tools

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John Howe - Brett

PermCalc

and tools

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John Howe - Brett

PermCalc

• Image of pavement construction

PermCalc

and tools

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John Howe - Brett

PermCalc

and tools

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John Howe - Brett

PermCalc

and tools

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John Howe - Brett

PermCalc

PermCalc • Summary

• Works in accordance to BS/Interpave methodology

• Not a black box - detailed guidance

• Easy and quick to use to produce cost effective design suggestions

• Very easy to undertake what if scenarios

• Uses default or clients costs

• Detailed output document

and tools

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John Howe - Brett

PermCalc

• PermCalc

• Proposed developments

• PermCalc v5

• Web site version

–Private web site – invited

–The world wide web

PermCalc

Any questions?

Permeable Pavement Design using PermCalc - ciria.com John Howe Chris Adcock ... •CIRIA SuDs Manual...

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