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HW30 Central Coast Highway

  • HW30 Central Coast Highway Ground Improvment
    Ground Improvement - Drilled Displacement Piles

Project Outline

Central Coast Highway / Manns Road / Brisbane Water Drive Intersections and Approaches Upgrade at West Gosford. Main construction of roadworks, bridgeworks and associated activities for the upgrade and involves the widening and realignment of Brisbane Water Drive and Manns Road between Kulara Avenue in the south and Stockyard Place in the north to form a single at-grade fully signalised intersection with the Central Coast Highway.

Scope of Works

Ground improvement of the Central Coast Highway between Erina Heights and Wamberal, 572No Drilled Displacement Piles 450mm dia; column depth from 5.0 to 14.1m; grid spacing: varies from 1.2 to 2.0m.

330 Church St, Parramatta, NSW.

  • Bulk Excavation Level reached
    Bulk Excavation Level reached
  • Excavation well under way
    Excavation well under way

Project Outline

Diaphragm Wall Construction for the proposed residential development at 330 Church Street, Parramatta, NSW. The proposed development will comprise two residential towers over a common podium level and four levels of basement carparking over the main rectangular portion of the site with the footprint of the basement extending to the eastern, western and southern boundaries, and set back between about 9m and 12m from the northern site boundary. The site is located within near level terrain on the south bank of the Parramatta River. Bulk excavations to a maximum depth of about 12m below existing surface levels to be carried out following the completion of the Diaphragm wall.

 

The work was carried out for Karimbla Construction Services Pty Ltd (Meriton Group)

Scope of Works

Design and construction of the diaphragm wall system with two rows of temporary rock anchors through the wall, which include:

 

Diaphragm wall: 49 panels x 640mm wide x 2800mm-7000mm length x 12m–13m depth

Temporary anchors: 2 rows x 243 rock anchors x approx. 14m-23m length

 

Works include:

  • Design works for the diaphragm wall.
  • Removal of 40 existing old reinforced concrete piles from the location of the diaphragm wall.
  • Design and construct Guide Wall.
  • Supply and installation of  all concrete,  reinforcing steel,  anchor blockouts and couplers.
  • Supply and installation of Inclinometer system.
  • Design, install and test all anchors.
  • Installation of standpipe piezometers and monitoring of groundwater levels.
  • Monitoring the performance of the southern boundary shoring using the inclinometers and survey monitoring points.
  • De stress the temporary anchors.

 

Concrete used: 50MPa for DW panels (volume 2,650m3)

                             25MPa for Guide Wall (volume 370m3)

Reinforcement: 200 ton

Kooragang Expansion Project - KEXP 4, Kooragang Island, NSW.

  • Primary panel with stop end arrangment
    Primary panel with stop end arrangment
  • Cages and stop end
    Cages and stop end
  • Concreting of a Primary panel
    Concreting of a Primary Panel
  • Bauer BC 32 Cutter in Action
    Bauer BC 32 Cutter in Action

Project Outline

Diaphragm Wall construction for Stage 4 (Project 145) for a fourth Dump Station and associated conveyor infrastructure at the Port Waratah Coal Services (PWCS) Kooragang Coal Terminal (KCT).

 

The work was carried out for Bechtel on behalf of PWCS.

 

The project included the following relevant elements:

  • A dump station which is approximately 15 m deep, 12 m wide and 66 m long. The walls were formed using diaphragm wall construction with a jet-grouted base plug.

A conveyor exits the base of the dump station through a tunnel which slopes up to a surface exit point about 200 m to the east and was constructed using a similar methodology to the main dump station.

Scope of Works

All construction associated with the diaphragm wall system and supporting base plugs (jet Grouting Plug) between the walls for both the dump station and the tunnel.

Dump Station area was divided by cross DW panels into 3 cells. Tunnel area was divided by (Jet Grouting) cross cut-off walls into 4 equal cells.

 

Dump Station

No. of Cells: 3

No. of Diaphragm Wall Panels: 25

Size of Panels: 11nos.x800mm wide x (2800mm-7000mm) length x 20m-28m depth.

                         24nos.x640mm wide x (2800mm-7000mm) length x 14m-21m depth.

 

Tunnel

No. of Cells: 4

No. of Diaphragm Wall Panels: 48

Size of Panels: 48nos.x640mm wide x (2800mm-7000mm) length x 11.3m-17m depth.

                              

Works include:

  • Design and Construct Guide Wall.
  • Supply and installation of  all concrete,  reinforcing steel,  hold-down bolts, couplers, embeds and ferrules.
  • Supply and installation of Inclinometer pipes.
  • Installation of A base block plug (Jet Grouting Plug) throughout  both the dump station and the tunnel to limit the inflow of water as specified.
  • Jet Grouting Cut-off Walls to separate the Tunnel into 4 sections.
  • Water Tightness Testing for all 7 Cells in the dump station and Tunnel.

 

Concrete used: 40MPa for DW panels (volume 4,673.8m3)

                             25MPa for Guide Wall (volume 476.2m3)

Reinforcement: 522.75 ton

Project examples

HW30 Central Coast Highway

HW30 Central Coast Highway

NSW

Central Coast Highway / Manns Road / Brisbane Water Drive Intersections and Approaches Upgrade at West Gosford. Main construction of roadworks, bridgeworks and associated...

Project examples

330 Church St, Parramatta, NSW.

330 Church St, Parramatta, NSW.

NSW

Diaphragm Wall Construction for the proposed residential development at 330 Church Street, Parramatta, NSW. The proposed development will comprise two residential towers over a...

Project examples

Kooragang Expansion Project - KEXP 4, Kooragang Island, NSW.

Kooragang Expansion Project - KEXP 4, Kooragang Island, NSW.

NSW

Diaphragm Wall construction for Stage 4 (Project 145) for a fourth Dump Station and associated conveyor infrastructure at the Port Waratah Coal Services (PWCS) Kooragang Coal...

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