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Proposed Mixed Use Development 157 Redfern St, Redfern Preliminary

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Proposed Mixed Use Development 157 Redfern St, Redfern Preliminary Powered By Docstoc
					Proposed Mixed Use Development
          157 Redfern St, Redfern

Preliminary Track Monitoring Plan
    Down Illawarra Relief, Redfern



          Date:        June 2009

          Reference:   113470

          Revision:    00
157 Redfern St, REDFERN
Preliminary Track Monitoring Plan




Document Control

 Rev     Document No.        Document Title         Date       Prepared by   Reviewed by      Approved by
 No

                          Track Monitoring Plan
                                                                Hard &         Julian
  00     113470 Prelim        Rail Crossing       17/06/2009                                   Colin Hard
                                                                Forester      Bosman
                           Botany Goods Line




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TABLE OF CONTENTS

1.0  Purpose .......................................................................................... 5 

2.0  References ..................................................................................... 5 

3.0  General Description and Requirements ...................................... 6 

4.0  Exclusions from this Specification.............................................. 6 

5.0  Monitoring ...................................................................................... 6 
   5.1  Scope ......................................................................................................................... 6 

   5.2  Location of Monitoring Points................................................................................. 6 

       5.2.1  Measurement during works ................................................................................. 6 

   5.3  Measurement equipment and accuracy ................................................................. 7 

   5.4  Monitoring Frequency .............................................................................................. 7 

   5.5  Data presentation ..................................................................................................... 7 

   5.6  Distribution of Monitoring Data .............................................................................. 8 


6.0  Notification and intervention levels............................................. 8 
   6.1  Rail Monitoring Intervention Levels........................................................................ 8 

       6.1.1  Alarm Level 1....................................................................................................... 8 

       6.1.2  Alarm Level 2....................................................................................................... 9 

       6.1.3  Alarm Level 3....................................................................................................... 9 


7.0  Emergency Procedures .............................................................. 10 

8.0  Safety and Training ..................................................................... 10 
   8.1  157 Redfern St, REDFERN ..................................................................................... 10 

       8.1.1  RailCorp Property .............................................................................................. 11 


Appendix A – Rail Safety & Monitoring Plan – Risk Assessment.... 12 



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Appendix B – Indicative Works Schedule .......................................... 13 

Appendix C – Monitoring Network & ULX Clearance ........................ 13 

Appendix D – Existing Track Parameters .......................................... 13 

Appendix E – Geotechnical Investigation .......................................... 13 

Appendix F – Emergency Contact & Distribution Lists .................... 13 




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1.0 Purpose
Deicorp intends to develop a mixed use building on the site of the existing Redfern RSL at
157 Redfern St, Redfern. The development will include underground car parking, retail &
commercial tenancies and a residential tower.

The site is adjacent to Redfern Station. The track of closest proximity to the site is the Down
Illawarra Relief in the ESR Tunnel. The sites’ northern and southern boundaries are
approximately adjacent to 1.24km and 1.29km respectively. The western boundary and face
of excavation is approximately 15 metres from the eastern edge of the ESR tunnel. The
design basement is RL 15.8 AHD, being approximately 15 metres below street level. Existing
rail levels will need to be determined by survey along with the precise location of the tunnel
relative to the site works.

This document sets out the technical requirements for monitoring of the Down ESR Tunnel
during the demolition, excavation and construction phases of the project. Following survey it
will include clearances to any services and infrastructure, survey requirements, monitoring of
infrastructure for settlement & deformation, limits to be observed and reporting and data
requirements.

2.0 References
Re-development of 157 Redfern St, Redfern will be undertaken in accordance with the
following Codes, Standards and Requirements.


Department of Planning- Director General’s Requirements
Redfern Waterloo Authority BEP Stage 1 August 2006
Relevant Australian Standards- Construction
Building Code of Australia


TMC 211                             Track Geometry and Stability (RailCorp)
TMC 203                             Track Inspection (RailCorp)
ESC 210                             Track Geometry and Stability (RailCorp)



Definitions

Contractor’s Competent Track Person: Person engaged by Deicorp to measure and
assess track geometry at the site listed in Section 1. The Nominated person must be
competent to examine and certify track, possess current Railcorp competencies ‘Visual
Inspect and Monitor Track’, ‘Record & Analyse Track Parameters (See TMC 203) and
‘Maintain Track Geometry’ (see TMC 211) and be acceptable to Railcorp.

Project Manager: Person nominated by Deicorp in the Site Specific Management Plan as
the contact for site activities affecting Railcorp infrastructure.




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3.0 General Description and Requirements
A geotechnical investigation has been completed for the development. It was found that the
original construction of Redfern Station will have relieved any insitu stresses. As such, the
proposed excavation will have a negligible affect on the adjacent station structure.

4.0 Exclusions from this Specification
This specification does not include Railcorp’s requirements for timing of works or protection
of rail traffic by Worksite Protection.

5.0 Monitoring
5.1     Scope

Should Railcorp decide it is necessary, Deicorp will contract a member of the Railcorp
Engineering Surveying Panel to implement a monitoring system in the Down Illawarra Tunnel
and Redfern Station in the vicinity of the proposed works. Deicorp will monitor the structures
at pre-determined intervals during demolition, excavation and construction to ensure the
track remains safe for the passage of trains. If movement greater than predicted is detected
increased monitoring frequency may be required.

5.2     Location of Monitoring Points

Location of monitoring points will be determined following a detailed survey of Railcorp
structures and infrastructure. A proposed monitoring point layout will be forwarded to
Railcorp for review prior to installation..

Track

A track alignment survey will be completed checking long & short twist, top, line & gauge.
The track survey results will be reviewed by the Deicorp competent track person to
establish permissible movements of track to reach defined action levels at each monitoring
point. These will be required in the event the tunnel and station structures movement is
greater than predicted.

        NOTE: Unless otherwise agreed the Alarm levels include any pre-existing variations
              in geometry.

        HOLD POINT: Track survey results and proposed action levels will be approved by
        the Railcorp Civil Maintenance Engineer or his delegate.

5.2.1   Measurement during works

After commencement of jacking operations, rail monitoring will be undertaken with the
variances from the baseline readings compared to previously defined action levels. The
survey monitoring results will be conveyed to site staff once the results have been calculated
and compared to the Base Line Values.




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5.3       Measurement equipment and accuracy

The rail monitoring surveys will be carried out by a member of the RailCorp Engineering
Authority Panel. Survey Party Leaders will be required to have Project Specific Engineering
Authority issued by the Railcorp Chief Surveyor.

A Rail Survey Procedure will be prepared that meets the requirements of RailCorp
Specifications SPC 211 Section 6 “Survey for track and other infrastructure” covering,

      •     Instrumentation

      •     Instrument Calibration

      •     Instrument Setup

      •     Survey Targets

      •     Observations

      •     Levels

      •     Reporting comparison to Engineering Standard ESC 210: Track Geometry and
            Stability and Engineering Manual TMC 203: Track Inspection.

Measurement of track geometry will be undertaken using the methods of measurement and
equipment detailed in TMC 203: Track Inspection.

This procedure will be approved by RailCorp prior to commencement of the installation.

5.4       Monitoring Frequency

          Survey and track measurements will be taken at the following frequencies:

      •     Prior to commencement: A minimum of three complete surveys of all points to be
            taken. Results to be averaged to produce the baseline values. Variations in results
            to be analysed to determine ambient range.

      •     During demolition, excavation & construction- monitoring will be conducted at
            intervals approved by Railcorp. These intervals may change according to changing
            risk from various stages of the development or if movement greater than predicted
            is detected

5.5       Data presentation

Data may be presented in numerical and graphical formats detailing lateral and vertical
movements. All result spreadsheets will be accompanied with a covering report providing
details for each site-monitoring visit including date of survey, time of survey, name of
surveyor, temperature at commencement of the survey, general weather conditions during
the course of the survey and any remarks or comments relative to the survey.




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5.6       Distribution of Monitoring Data

Data is to be processed and results provided to the RailCorp appointed person and to the
Deicorp representative for distribution. A Data Report Distribution List is included in Appendix
E.

6.0 Notification and intervention levels
6.1       Rail Monitoring Intervention Levels

The following table is an example only of the parameters and associated measurements to
be applied. Values will be determined from RailCorp Standards ESC 210 once the existing
track alignment and track speeds have been confirmed.

Monitoring Parameters       25% of Normal       50% of Normal        75% of Normal       100% of Normal
                             (min 5 mm)          (min 6 mm)

                                  Port Botany Line (50 km/hr speed limit)
                                       Adopting 60 km/hr speed limit

      Track Top (4m)            11 mm                13 mm                  18 mm            21 mm

      Track Line (8m)           10 mm                12 mm                  16 mm            19 mm

   Short Twist (2m)              8 mm                9 mm                   13 mm            15 mm

   Long Twist (14m)             20 mm                24 mm                  35 mm            40 mm

                    No. 1 and 2 Yard New Sidings & James Siding (20 km/hr speed limit)

      Track Top (4m)            14 mm                17 mm                  23 mm            27 mm

      Track Line (8m)           18 mm                22 mm                  31 mm            36 mm

   Short Twist (2m)              9 mm                11 mm                  16 mm            18 mm

   Long Twist (14m)             26 mm                32 mm                  45 mm            52 mm

6.1.1     Alarm Level 1

Any detected movement > 25% but ≤ 50% of Normal Limits or where significant movements
have been detected above those predicted.

Measurements

Verify movement by reviewing and repeating the survey. The competent track person shall
carry out an immediate survey of gauge, track line and top to confirm movement and assess
track geometry.

Notification

Notify all parties following detection of movement.



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Continuation of works

If settlement has exceeded the predicted settlement the Geotechnical Engineer is to
reassess and, if appropriate, approve continuation of the work. On approval by the
Geotechnical Engineer, works shall not stop at this point but shall proceed with caution and
increased vigilance in the areas of detected movement.

6.1.2   Alarm Level 2

Any detected movement > 50% but ≤ 75% of Normal Limits where movement has been
steady.

Measurements

Verify movement by reviewing and repeating the survey. The competent track person shall
carry out an immediate survey of gauge, track line and top to confirm movement and assess
track geometry.

Notification

Notify all parties following detection of movement.

Continuation of works

The Geotechnical Engineer shall reassess and, if appropriate, recommend continuation of
the work. If the Geotechnical Engineer does not recommend continuation of the works, he
shall determine remedial measures to be implemented prior to re-commencement of the
works, to prevent further settlement. Work must not proceed unless approval has been given
by the Civil Maintenance Engineer for work that will exceed Alarm Level 3.

6.1.3   Alarm Level 3

If movement preceding this level have been gradual, alarm levels 1 and 2 control measures
shall have been introduced to prevent this level of movement occurring. Consequently, the
control measures identified for level 3 are identified on the basis of a sudden movement only.

If a sudden movement of > 50% but ≤100% of Normal Limit is detected:

Notification

Notify all parties following detection of movement.

Continuation of works

All works will cease immediately. Works shall not recommence until methodology and
monitoring procedures are reviewed and remedial measures/revisions, are approved by the
Civil Maintenance Engineer.

If a sudden movement of >100% of Normal Limits is detected:



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Notification

Apply emergency procedures immediately. Notify all parties.

Continuation of works

All works will cease immediately. The competent track person shall assess the track
geometry and take appropriate action. This may include speed restrictions and consultation
with RailCorp’s Civil Maintenance/Asset Engineer. Works shall not recommence until
methodology and monitoring procedures are reviewed, remedial measures/revisions are
approved by RailCorp (Principal Geotechnical Engineer and Chief Engineer Track) and track
geometry corrective works have been undertaken.

7.0 Emergency Procedures
In the event of an emergency, the competent track person will immediately stop trains and
notify Train Operations in accordance with RailCorp Standards and Procedures.

The Project Manager on site will notify the people on the Emergency Contact List. An
Emergency Contact List is included in Appendix E.

The Water Delivery Alliance will undertake all tasks to ensure site and train operation safety
during the interim while RailCorp initiate their Emergency Response Procedure.



8.0 Safety and Training
8.1       157 Redfern St, REDFERN

These works will be carried out as part of the 157 Redfern St, Redfern re-devlopment. The
Site Specific Management Plan will form the basis for safety requirements and
responsibilities.




All personnel working in connection with the Project shall:

      •    have completed the Project Safety Induction;

      •    hold a WorkCover General Construction Induction card;

      •    comply with the requirements of the Project Plans and procedures;




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8.1.1       RailCorp Property

Railcorp structure monitoring activities will require works to be completed within the rail
corridor.

These works will be subject to these additional requirements:

        •    Only those workers required to complete the works shall enter the rail corridor

        •    All personnel required to enter the rail corridor will have current Rail Industry Safety
             Induction accreditation

        •    A certified Worksite Protection Officer (WPO), provided by the Surveyor, will
             accompany personnel within the rail corridor at all times

        •    All personnel working within the rail corridor will follow the directions of the WPO.

        •    Works within the rail corridor shall be completed in accordance with the RailCorp
             approved site specific Safe Work Method Statement (SWMS) and the WPO’s daily
             Site Assessment




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Appendix A – Rail Safety & Monitoring Plan – Risk Assessment
                                                                                                                                                                                                         Likelihood
RISK RATING TABLE
Consequence                                                              Likelihood               Risk Level                                                                               1        2          3      4        5

1.        Catastrophic   >$100M / Multiple Fatality                      1.   Certain             E     Extreme                                                                   1        E        E        VH       VH       H




                                                                                                                                                                    Consequence
2.        Major          <$100M / Single Fatality                        2.   Likely              VH    Very High                                                                 2        E        VH       VH       VH       H
3.        Serious        <$10M / Life Threatening Injury                 3.   Possible            H     High                                                                      3       VH        VH         H      M        L
4.        Important      <$1M / Medical Treatment                        4.   Unlikely            M     Moderate                                                                  4        H        H          M      M        L
5.        Minor          <$10K / First Aid                               5.   Rare                L     Low                                                                       5        M        M          L      L        L




     Issue                                                          Untreated Risk                      Control                                                                                Treated Risk
                                                           Consequence        Likelihood   Risk Level                                                                                 Consequence       Likelihood    Risk Level

     1.      Collision between train and                       2                 3           VH                Minimise work within rail corridor                                         2                5               H
             worker whilst working within rail                                                                 All personnel entering the rail corridor to be RISI
             corridor                                                                                          accredited
                                                                                                               Certified WPO to monitor rail activity and control works
                                                                                                               whilst works within rail corridor are being carried out
                                                                                                               WPO to carry out site assessment and brief workers
                                                                                                               prior to commencement of work
     2.      Demolition results in damage                      3                 4            M                Geotechnical assessment                                                    3                5               L
             to Railcorp structures, leading                                                                   Monitoring of Railcorp structures
             to interruption to rail services                                                                  Liaison with RailCorp for Contingency Planning
     3.      Excavation results in damage                      3                 3            H                Geotechnical assessment                                                    3                5               L
             to Railcorp structures, leading                                                                   Design of shoring
             to interruption to rail services                                                                  Monitoring of Railcorp structures
                                                                                                               Liaison with RailCorp for Contingency Planning
     4.      Construction results in damage                    3                 4            M                Geotechnical assessment                                                    3                5               L
             to Railcorp structures, leading                                                                   Design of crossing within stable strata
             to interruption to rail services                                                                  Monitoring of Railcorp structures
                                                                                                               Use of drilling muds to maintain open borehole
                                                                                                               Liaison with RailCorp for Contingency Planning




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Appendix B – Indicative Works Schedule
Appendix C – Monitoring Network & ULX Clearance
Appendix D – Existing Track Parameters
Appendix E – Geotechnical Investigation
Appendix F – Emergency Contact & Distribution Lists
The following contacts should be advised of the emergency in the order shown,

Order       Organisation                        Contact Name   Position                Contact Number

1           RailCorp Train Operations                                                  02 9379 1743

2           Emergency Services                                                         000

3           RailCorp                                           Civil Maintenance
                                                               Engineer

4           RailCorp                                           Geotechnical Engineer

5           RailCorp                                           Project Manager

6           Deicorp                                            Project Manager

7           Deicorp                                            Project Engineer

The following data report distribution list should be used for distribution on a daily basis in accordance
with Section 5.6.

Organisation          Position                     Name           Email address

Deicorp               Project Manager

Deicorp               Project Engineer

RailCorp              Civil Maintenance
                      Engineer

RailCorp              Project Manager

RailCorp              Geotech Services




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