New Tyne Crossing Construction Activity Summary May 2009 North Cut - - PowerPoint PPT Presentation
New Tyne Crossing Construction Activity Summary May 2009 North Cut and Cover Summary Transition structure Cut and cover excavation within Howdon Yard Tyne View Terrace diversion over temporary bridge Ongoing excavation (bottom up
Transition structure Tyne View Terrace diversion over temporary bridge Cut and cover excavation within Howdon Yard Diaphragm wall work areas North cut and cover Current works – D-walls Excavation C&C Excavation Transition Preparation for crossover slabs Gas main diversion (Aerial Photo Mid March) Ongoing excavation (bottom up construction) Crossover section (top down construction) Sewer diversions physically complete – testing and commissioning phase
Cut and cover excavation beneath Tyne View Terrace temporary bridge – view north from Howdon Yard Howdon Yard Current works – Excavation C&C Excavation – Transition 12 May 09 Level of top slab of tunnel structure Bottom of excavation -6m AOD approx Third level of propping is remaining to be installed before base slab
Cut and cover excavation within Howdon Yard. Howdon Yard Current works – Excavation C&C Excavation – Transition 21 May 09 View North Transition wall View South Connection for roof of tunnel Sewer bridge south of Tyne View Terrace Second and propping levels – mid tunnel
Cut and cover excavation within Howdon Yard. Howdon Yard Current works – Excavation C&C Excavation – Transition 21 May 09 Exposing roof connections on east wall Excavation heading north
Crossover section to be constructed using top down technique. Roof slab to be constructed first, the excavation beneath the slab to follow. Couplers for roof slab Slurry wall to support reduced depth D-wall in crossover section (green material) Gas main crossing
Second intermediate propping level – mid tunnel (-9.70 m AOD) 21 May 09 Ground level Tunnel roof level Excavation approx 1- 2m short of final level for concrete base slab April 09 First intermediate propping level (-2.60 m AOD)
Connection to existing mains A19 crossing A19 crossing Connection to existing mains Cycleway diversion Cut and cover spoil stockpiles East Howdon Bypass crossing Gas main diversion Works complete mid June De-mobilisation end June
Wall / roof pours completed since photo was taken in mid March Completed tunnel sub elements TE 3A TE 3B TE 3C TE 3D TE 4D TE 4C TE 4B TE 4A TE 2D TE 2C TE 2B TE 2A TE 1A TE 1B TE 1C TE 1D Dock 4, Wallsend Current works – Concreting of tunnel elements and internal fit out of ballast tanks and intermediate floors 11 No. of 16 sub sections complete (base and wall / roof pours)
Tunnel Element 2 Section D Dock 4, Wallsend Current works – Concreting of tunnel elements and internal fit out of ballast tanks and intermediate floors 11 No. of 16 sub sections complete (base and wall / roof pours) View from dock gate across TE 1 and TE 2 Ballast tank and intermediate floor installation in completed units
View from southern river bank looking north-west Photograph taken 27/5/09
Excavation depth approximately 16m below capping beam level. 3 No. levels of props installed, 2No. further prop levels required to be installed. Photograph taken 27/5/09
View from Monastery Court looking north Photograph taken 11/5/09
Excavation of SCL 1 South access shaft in
completion end June
proposed July 09. D-Wall Construction of SCL 2 north and south access shafts complete. D-Wall Construction of South cut and cover section in progress. Proposed completion for section July 09. D-wall construction south of transition structure ongoing. Proposed completion Mid June 2009.
Excavation of SCL No 1 northern shaft Photograph taken 27/5/09
High Street re-opened 22/5/09.
CFA piles and capping beams complete Diaphragm wall construction ongoing. Proposed completion of section July 09. Construction of P4 Bridge abutments and central pier ongoing. Retaining wall adjacent A19 part demolished Bulk excavations ongoing
View from Monastery Court looking south. Photograph taken 11/5/09
Salem Street temporarily closed 22/5/09 Jarrow Albion Sub-Station now demolished New Jarrow Albion Sub-Station live
High Street re-opened on 22nd May 2009. Road construction is temporary and will therefore be closed once again following construction works at Salem Street. Photograph taken 27/5/09 Salem Street and Friar Way footpath closed following re-opening of High Street on 22nd May 2009. Photograph taken 27/5/09
Excavations ongoing at CFA Section
Looking north along access point Photograph taken 27/5/09 Looking south Photograph taken 27/5/09
Construction of P7 and P8 retaining walls ongoing
Aerial photograph of south junction taken Mid March 2009
Demolition of existing tunnel entrance retaining wall adjacent to A19 to facilitate construction of Bridge P4 Proposed tunnel closure for 11/12th July for lifting in of bridge beams for P4 and P6 structures Construction of P4 Bridge ongoing Straker Street. Lane temporarily closed mid May for construction
Construction of P6 Bridge
Construction of block faced reinforced earth structures P7 and P8 adjacent southern loop road Photograph taken 27/5/09
Construction of P6 bridge at southern junction Photographs taken 27/5/09 West Abutment Central pier Central pier East Abutment