NorthConnect
Airport Link and Northern Busway Tender Design
Preliminary Advice on Northern
Busway Pavement
HYDER SMEC JV
Airport Link & Northern Busway – Project Bid
Preliminary Advice on Northern Busway Pavement
Coffey (Hyder SMEC JV) PV-NB-01 Preliminary 220-PVNB01-00049-C-R 02 30 August 2007 Sven Padina Weeks White Alan Clover Signature: Signature: Signature: CONSULTANT: DESIGN LOT: STAGE: DOCUMENT No.: REVISION No.: ISSUE DATE: AUTHOR: CHECKED: REVIEWED BY:
Doc. Ref. File Ref. Issue Date
220-PVNB01-00049-C-R-02
D:\\iknow\\docshare\\data\\cur_work\\95075674.doc 30 August 2007
Page 1 of 15
NorthConnect
Airport Link and Northern Busway Tender Design
Preliminary Advice on Northern
Busway Pavement
HYDER SMEC JV
Remove this page when final copy is submitted
Date 22/8/2007 30/8/2007 Revision 01 02 03 Author Sven Padina Sven Padina Checker Weeks White Weeks White
Doc. Ref. File Ref. Issue Date
220-PVNB01-00049-C-R-02
D:\\iknow\\docshare\\data\\cur_work\\95075674.doc 30 August 2007
Review Revision Description Alan Clover First Draft Alan Clover First Issue
Page 2 of 15
NorthConnect
Airport Link and Northern Busway Tender Design
Preliminary Advice on Northern
Busway Pavement
HYDER SMEC JV
TABLE OF CONTENTS
Page
1
1.1 1.2 1.3 1.4
CONCEPT DESCRIPTION
Introduction Busway Description
Busway Design Requirements Design Traffic
Brief Requirements for Design Traffic Design Traffic Loads
4
4 4 4 5
5 5
1.4.1 1.4.2
1.5 1.6 1.7 1.8 1.9
Subgrade Conditions
Preliminary Busway Pavement Assessment / Design ( No LRT ): Rigid Pavement Design Review
Preliminary Busway Pavement Assessment / Design ( No LRT ): Flexible Pavement Design Review
Incorporation of Light Rail within Busway Reuse or Rehabilitation of Existing Pavements
6 7 9 11 12
2
2.1 2.2 2.3
ASSUMPTION / DEPARTURES
Design Traffic Loads Subgrade Conditions
Incorporation of Light Rail within Busway
13
13 13 13
3 4 5 6 7 8 9 10 11
RISKS / OPPORTUNITIES OPERATION & MAINTENANCE SAFETY IN DESIGN CONSTRUCTABILITY
ENVIRONMENTAL IMPACTS & APPROVALS ENVIRONMENTALAL SUSTAINABILITY ADVANTAGES / DISADVANTAGES
OUTSTANDING INFORMATION / MATTERS FOR RESOLUTION RECOMMENDATIONS
14 14 14 14 14 14 14 14 15
Doc. Ref. File Ref. Issue Date
220-PVNB01-00049-C-R-02
D:\\iknow\\docshare\\data\\cur_work\\95075674.doc 30 August 2007
Page 3 of 15
NorthConnect
Airport Link and Northern Busway Tender Design
Preliminary Advice on Northern
Busway Pavement
HYDER SMEC JV
1 1.1
CONCEPT DESCRIPTION Introduction
This report presents preliminary pavement design advice for the Northern Busway (NB) tender design together with a discussion on preliminary assumptions made on design traffic and subgrade conditions. This preliminary advice has been restricted to review and comment on the adequacy of the Request For Proposal (RFP) Brief pavement designs only, presenting two separate design option reviews, one considering Bus only traffic in Busway, and the other considering the possible future inclusion of a Light Rail line within the Busway.
The RFP Exhibit A, Annexure 1 – Part 1 clause 5.3.3(c) presents specific minimum thickness pavement designs to be used for Busway applications. In lieu of developing alternative pavement designs, to support early stage project planning we have only carried out an adequacy assessment of these designs based on the initial traffic and sub grade conditions discussed in Sections 2.2.1 and 2.3.
Additionally it should be noted that this review of RFP pavement designs only provides preliminary LRT pavement advice, and detailed design and modelling calculations are required to more completely assess pavement thickness and reinforcing.
1.2
Busway Description
We understand that the proposed Busway will be developed in two stages as follows; Stage 1 (current development): Construction of the Interim Design comprising the following key elements;
1. A dedicated Busway from the southern connection north to Federation Street, including
bridge and trough structures. 2. Addition of Bus-only lanes to Lutwyche Road, Truro Street and Roblane Street from
Federation Street to Stoneleigh Street. 3. Dedicated Busway tunnel and trough structures from Stoneleigh Street to Gympie Road. Stage 2 (possible future development): Construction of a dedicated Busway tunnel linking 1 and 3 above.
Following completion of Stage 2 works a Light Rail Transport (LRT) line may also be incorporated within the Busway corridor to operate in conjunction with Bus operations. Provisions for LRT are to be included within pavement design and construction of Stage 1 Bridge, Trough and Tunnel structures.
1.3
Busway Design Requirements
The pavement design requirements have been sourced from the following project documents; ? Project Deed.
? Request for Proposal (RFP), 14 June 2007.
? RFP Exhibit A, Performance Specification (including all attachments).
Doc. Ref. File Ref. Issue Date
220-PVNB01-00049-C-R-02
D:\\iknow\\docshare\\data\\cur_work\\95075674.doc 30 August 2007
Page 4 of 15
NorthConnect
Airport Link and Northern Busway Tender Design
Preliminary Advice on Northern
Busway Pavement
HYDER SMEC JV
1.4 1.4.1
Design Traffic
Brief Requirements for Design Traffic
The key tender requirements with respect to Busway traffic for pavement thickness designs are as follows; Design Life
(RFP Exhibit A Annexure 1 – Part 1 Table A)
? Pavements for Busways, Bus stations, Bus stops, Bus only lanes, Bus lanes (Turo
street only) (other than wearing surfaces) – 40 years. ? Pavement wearing surfaces – 10 years. Design Traffic
PPP Co must design the Busway, Busway Stations, Bus Stops, Bus Lanes (Truro Street only) and Bus-only Lanes for a traffic loading (Nes) = 2.1 x 108 (per lane) which assumes a 40 year Design Life. (RFP Exhibit A Annexure 1 – Part 1 Clause 5.3.3 (b))
PPP Co must design any other lanes which buses may use (other than Truro Street) for the maximum of: (RFP Exhibit A Annexure 1 – Part 1 Clause 5.3.3 (d))
(i) the design requirements of the relevant road authority (i.e. Council or QDMR) over the Design Life; and
(ii) the bus traffic loading as noted above plus the traffic loading as determined from PPP Co’s traffic model assessment of expected other traffic volumes and other vehicle mixes over the nominated Design Life.
PPP Co must make all allowances for the future provision of LRT to operate within the Busway and must design and construct the Project Works to allow for the operation of LRT vehicles in collocation with buses within the Busway at some later date. (RFP Exhibit A Annexure 1 – Part 1 Clause 8.1 (a))
1.4.2
Design Traffic Loads
As the results from the tender design traffic model are not yet available, Design traffic has been derived by only considering the RFP supplied Busway design traffic in dedicated Busway and Bus only lanes. A resulting breakdown of this RFP design traffic for both rigid and flexible pavement design are as follows;
? The number of standard axles of equivalent damage to the sub grade (Nes) = 2.1 x 108
per lane for 40 year Design Life (as specified in the RFP) ? Estimated number of standard axles of equivalent damage to asphalt (Nea) = 2.42 x 108 ? Estimated cumulative heavy vehicles (HV) = 1.9 x 108
? Estimated cumulative heavy vehicle axle groups (HVAG) = 4.4 x 108
Doc. Ref. File Ref. Issue Date
220-PVNB01-00049-C-R-02
D:\\iknow\\docshare\\data\\cur_work\\95075674.doc 30 August 2007
Page 5 of 15