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River Pinn to Breakspear Road

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River Pinn to Breakspear Road London West Midlands HS2 Hillingdon Traffic and Construction Impacts Contents Page number 1 Executive summary ................................................................................................. 1 2 Introduction ............................................................................................................ 2 2.1 General .................................................................................................................... 2 2.2 Traffic Flows ............................................................................................................ 3 2.3 Sustainable Placement ............................................................................................ 3 3 Options to be carried forward and to be considered by the Promoter for inclusion within contractual documentation ................................................................................. 5 3.1 Re-use of excavated material from Copthall Cutting to construct Harvil Road Embankments .................................................................................................................... 5 3.2 Construction of bridge structures instead of railway embankments – River Pinn to Breakspear Road ............................................................................................................ 9 3.3 Use of excavated material for interval embankment between HS2 and Chiltern Lines 19 3.4 Commence importation of material earlier in the programme ........................... 21 3.5 Retention of Railway ‘Up-Sidings’ at Ickenham Road for importation of fill ....... 25 3.6 Early Construction of Initial West Ruislip Railhead Siding .................................... 30 3.7 Construction of West Ruislip Railhead Siding and Railhead with eastern rail connection west of Breakspear Road South .................................................................... 33 3.8 Use of material to reinstate southern holes at Uxbridge Golf Course ................. 36 3.9 Use of material in the reconstruction of Ruislip Golf Course and to create a bund 37 3.10 Relocation of segment factory from Harvil Road to an independent site ............ 40 4 Traffic Management Options ................................................................................. 44 4.1 Consideration of extending HGV movement hours to reduce movements at peak times, or during school holiday periods .......................................................................... 44 4.2 Use of alternative traffic route – Long Lane ......................................................... 45 5 Options considered and rejected ........................................................................... 48 5.1 Bund within the Copthall Cutting on completion of construction ....................... 48 HS2 Hillingdon Traffic and Construction i Uncontrolled when printed Impacts Printed 8/6/2016 C221-MMD-CL-REP-010-500043 Revision – P02 INTERNAL Date approved – 7th June2016 5.2 Use of Chiltern Line to deliver fill from running line overnight ............................ 50 5.3 Alternate routing options for construction traffic movements ........................... 51 5.4 Gyratory and/or tidal flow on road network ........................................................ 54 5.5 Use of TfL West Ruislip Depot ............................................................................... 57 5.6 Use of larger capacity HGVs .................................................................................. 58 5.7 Use of “treated” EM in lieu of imported fill for West Ruislip and Gatemead Embankments .................................................................................................................. 60 5.8 Reduce excavated volumes by using steeper cut slopes ...................................... 60 5.9 Use of the same HGVs for both import of fill and export of excavated material. 61 5.10 Change fit-out strategy to provide programme gain for civil works .................... 61 5.11 Shorten the Northolt West tunnel drives to provide programme gain for preceding civils works ...................................................................................................... 62 6 Measures to reduce vehicles associated with workforce traffic ............................. 62 7 Conclusions ........................................................................................................... 64 7.1 HGV reductions from options to be carried forward ........................................... 64 7.2 Reductions in Sustainable Placement ................................................................... 66 7.3 Cost and programme implications ........................................................................ 67 7.4 Further Work ......................................................................................................... 68 Appendix A ..................................................................................................................... 1 HS2 Hillingdon Traffic and Construction ii Uncontrolled when printed Impacts Printed 8/6/2016 C221-MMD-CL-REP-010-500043 Revision – P02 INTERNAL Date approved – 7th June2016 List of figures Figure 2.1 AP2 HGV daily 2-way movements ........................................................................ 3 Figure 3.1 Geology – 3No. Historic boreholes on section of route ....................................... 5 Figure 3.2 Longitudinal section of embankment along re-aligned Harvil Road .................... 6 Figure 3.3 Possible cross section of an embankment with compacted clay fill .................... 7 Figure 3.4 Plan showing Gatemead and West Ruislip Embankments ................................ 9 Figure 3.5 Option 1 - Gatemead Viaduct and West Ruislip Embankment ....................... 10 Figure 3.6 Option 2 - Gatemead Embankment and West Ruislip Full Length Viaduct .... 11 Figure 3.7 Option 3 - Gatemead Viaduct and West Ruislip Full Length Viaduct .............. 12 Figure 3.8 Option 4 - Gatemead Viaduct and West Ruislip Infill Viaduct and East Embankment ....................................................................................................................... 13 Figure 3.9 Option 5 - River Pinn three span bridge ............................................................. 13 Figure 3.10 Option 6 - River Pinn increased span bridge .................................................... 14 Figure 3.11 Use of the interval between HS2 and NR for fill .............................................. 19 Figure 3.12 Early Importation of Fill - Gatemead & West Ruislip Embankments ............... 21 Figure 3.13 Early Importation of Fill – Harvil Road Embankment ..................................... 23 Figure 3.14 Combined peak lorry movements per day - Comparison ................................ 24 Figure 3.15 Chiltern Line ‘Up Sidings’ west of Ickenham Road ........................................... 26 Figure 3.16 Side discharge rail wagons ............................................................................... 27 Figure 3.17 Lafarge self-discharge train .............................................................................. 28 Figure 3.18 Grab handling of material from rail wagons .................................................... 28 Figure 3.19 Early Construction of Rail Siding at West Ruislip Railhead ............................... 30 Figure 3.20 Full EM Railhead – following completion of new Harvil Road Bridge ............. 31 Figure 3.21 Railhead eastern rail connection west of Breakspear Road South ................. 33 Figure 3.22 Conveyor support structure - left, adjacent vehicle access (Crossrail) - right 34 Figure 3.23 Alternative conveyor route options ................................................................ 34 Figure 3.24 Location map - Uxbridge Golf Course .............................................................. 36 Figure 3.25 Bund within LOD .............................................................................................. 38 Figure 3.26 Bund within 60m exclusion zone ...................................................................... 39 Figure 4.1 Extract from London Cycle Network .................................................................. 46 Figure 5.1 reduction in traffic numbers using larger HGVs ................................................. 59 HS2 Hillingdon Traffic and Construction iii Uncontrolled when printed Impacts Printed 8/6/2016 C221-MMD-CL-REP-010-500043 Revision – P02 INTERNAL Date approved – 7th June2016 Figure 6.1 Potential mini-bus route from West Ruislip Station ......................................... 63 Figure 6.2 Potential mini-bus route from Ickenham Station .............................................. 63 Figure 7.1 Peak lorry movements – West Ruislip (based on AP2 programme) ................. 66 HS2 Hillingdon Traffic and Construction iv Uncontrolled when printed Impacts Printed 8/6/2016 C221-MMD-CL-REP-010-500043 Revision – P02 INTERNAL Date approved – 7th June2016 List of tables Table 3-1 – Harvil Road Embankment Criteria ...................................................................... 6 Table 3-2 Comparison of Quantities for Alternative Options ............................................. 15 Table 3-3 Comparison of Programme and Costs for Alternative Options........................... 16 Table 3-4 Two-way peak daily HGV reductions ................................................................... 23 Table 3-5 Additional HGV movements to portal via Ickenham Road .................................
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