.

Greater Springfield is Queensland’s largest mater planned community and includes six suburbs including Springfield, Springfield Lakes, Springfield Central, Brookwater, Augustine Heights and Spring Mountain.

Converting old forestry lands and Creating a community that includes more the 22 000 residential dwellings, University, Hospitals, Major Retail Hub, Golf Course, Aged Care facilities, 7 Schools, highways and railways required substantial Geotechnic Input. Morrison Geotechnic has overseen more construction in the Greater Springfield Area than any other Geotechnical Consultant. It is fair to say that Morrison Geotechnic’s involvement at Greater Springfield is greater than all of our competitor’s combined. The marked up plan attached shows where Morrison Geotechnic has been involved.

Morrison Geotechnic has worked closely with numerous engineering consultants, town planners, civil contractors and developers as well as Schools, Local and State Government agencies to ensure design integrity from a Geotechnical Perspective.

Morrison Geotechnic has been involved at Greater Springfield since its inception in the late 1990’s. Key developments within Greater Springfield that have succeeded from the input of Morrison Geotechnic include: –

  • Construction of three man-made lakes and associated Dams
  • Sinnathanby Boulevard
  • Springfield Greenbank Arterial Road
  • Augusta Parkway Upgrade.
  • Springfield Lakes including
    • Eden’s Homestead
    • Olive Springs
    • Bridgewater Estate
    • The Promenade
    • The Summit,
    • Escarpment
    • Wild Flower Ridge
    • The Sanctuary
    • Butterfly Green
    • Lakes Entrance
    • Tea Trees
    • Aspect
    • Central Walk
    • Peninsula
  • Springfield Bunnings
  • Augustine Heights Stages 2, 4, 7, 8, and 12 to 19
  • Brookwater Stages 4, 5, 6, 8, 13 and 14 and
  • Numerous Geoetchnical Investigations.

In 2007 alone, at Springfield Lakes over 1500 lots were constructed and sold to meet demand which was at the time a new Australian Record.

The Quay Street Apartments comprise a 12 storey concrete framed building with a two and three level basement constructed to abut the site boundaries. The geotechnical challenges included ensuring that the basement excavation and temporary retention system minimised the potential for structural instability of adjacent buildings which were located immediately behind the side boundaries.

In 2013 Morrison Geotechnic carried out geotechnical investigations to supplement a pre‑existing study and provided geotechnical advice including:-

  • Excavation conditions;
  • Temporary excavation retention systems with design parameters;
  • Design parameters for permanent basement walls;
  • Foundation options including design parameters for strips, pads, rafts and piles.

In 2014 Morrison Geotechnic also provided geotechnical advice during basement excavation and construction of the temporary anchors supporting the excavation and foundation verification for footings.

The Flinders Master Planned Town is a residential development project eventually covering 4000 hectares and located 50kms south of Brisbane within the City of Logan. When fully developed over 30 years, Flinders will accommodate 45000 residents in 15000 dwellings, with over 2000ha of open space, golf course and lakes. The Flinders Master Plan is underpinned by a series of key design elements including a mixed use town centre, a network of interconnected thoroughfares and linear open spaces, local village centres and a variety of urban settings seamlessly integrated into the natural environment. The Queensland Government has included 1000ha of the site in a Priority Development Area (PDA) to provide short term residential land supply that is affordable and sustainable as well as employment, educational and recreation land use opportunities. This PDA designation of the 1000ha land parcel occupying the eastern portion of the entire Flinders site and known as Precinct 1 has resulted in Development Approvals that initially achieve 7250 dwellings and a population of 18000 as well as a range of commercial, industrial, retail, recreation and tourism uses. Subject to Government approval, Precinct 1 also includes a proposed 34ha lake to enhance the amenity of the development and provide recreational opportunities. This proposed lake will be located in the south-east corner of Precinct 1 and will be formed by the construction of a 10m to 12m high earth embankment dam across an unnamed creek which joins Teviot Brook 1.3km downstream of Precinct 1. The Flinders development site is characterised by significant areas of highly dispersive and erodible soils. Many of the drainage corridors are deeply eroded with cuts of 3m to 5m in the upper catchments and greater than 6m in the lower catchments. Eroded materials cover the floors of the drainage features and creeks and has resulted in high turbidity in all waterways discharging from the site. The undeveloped catchment of the proposed lake is approximately 600ha which is located mostly in Precinct 1.

 

Over the past 10 years, Morrison Geotechnic has provided and continues to provide geotechnical input into the planning and concept development phases of this project, and in particular the concept feasibility and design of the proposed lake embankment in Precinct 1, and access roads. This work has involved terrain evaluations and slope stability assessments, borehole drilling, in situ testing and laboratory testing to assess general geotechnical conditions including dispersion potential of the soils, material strengths and permeability properties, rock depths, types and quality, and groundwater conditions.

The other consultants in the design team are currently using this geotechnical data to inform:

  • The design of the proposed lake embankment;
  • Seepage losses and lake hydrology including embankment hydraulic cut‑off requirements;
  • Management of dispersive soils;
  • Lake floor and embankment treatment options.

 

Further geotechnical investigations and testing will be conducted as the design concepts are further developed to final design stage and construction.

Since February 2014 Morrison Geotechnic has been engaged to perform geotechnical services for the construction of three new bridges over the Bruce Highway. On the strength of our reputation and ability, Morrison Geotechnic successfully won each project individually; at Kerr Road North Lakes, Pumicestone Road Caboolture, and Roys Road Caloundra.

Each project involved major highway upgrades, bridge construction, and associated infrastructure, such as roads and drainage.

Morrison Geotechnic faced the challenges of working in close proximity to traffic, and the need to ensure safe construction over soft ground. Morrison Geotechnic were able to quickly and accurately advise the project team on building crane pads on soft ground, to allow cranes to move building girders and other heavy items.

With geotechnical consulting by the Morrison Geotechnic Brendale and Maroochydore teams, the projects are on track for completion in mid-2015.

The geotechnical investigation was carried out as part of the Jet Fuel Pipeline to the Airport. A 1.1km section of the pipeline is to be installed using Horizontal Directional Drilling (HDD) techniques beneath the Brisbane River.

The Client is considering two founding options for the proposed pipeline for the Brisbane River crossing. The first option would involve founding the pipe within the alluvial clays and sands above gravels and bedrock. The second option would involve extending the pipeline through all alluvial soils and founding within the underlying bedrock.

The investigation was carried out to assess the sub-riverbed conditions at the borehole locations as well as the feasibility of each of the proposed HDD options. The investigation was carried out to assess the composition and strength of the encountered soils and the rock type, rock strength, rock defects, joint spacing and abrasivity to broadly assess the expected excavation conditions at the borehole locations.

The investigation involved consultation with Maritime Safety Queensland (MSQ), The Port of Brisbane as the investigation area was located within close proximity to riverbed services and navigation signals for shipping.

The project was completed 2 days ahead of schedule and 10% under budget.

On 30 June and 1 July 2005 torrential rain events drenched south east Queensland dumping over 600mm of rainfall on parts of the Gold coast creating havoc and initiating numerous landslides. Currumbin Hill was one of the worst hit areas with numerous properties damaged and rendered uninhabitable. After the land slide, several houses had foundations completely exposed and lost all of their back yards.

Morrison Geotechnic was involved with the immediate Emergency Response Plan identifying unsafe houses which were evacuated and then with the design of the extensive repair and remedial works for the affected areas and properties. Morrison Geotechnic also provided slope stability assessments to GCCC for numerous properties which had been identified as being at unacceptable risk of further movements.

The Goat Track is a 3km stretch of road between Mt Glorious Road and Mt Nebo Road, which was significantly damaged during rain events of the 2011, 2012 and 2013 Summers. As well as the road, steep slopes above and below the road alignment were also significantly damaged.

Morrison Geotechnic was engaged as the Principal Geotechnical Engineering and Testing Consultant to verify the repairs of unstable slopes, damaged pavements and drainage networks.

Morrison Geotechnic verified the construction of numerous rock replacement walls, shotcrete and soil nail walls and Expanded Polystyrene Walls.

Repair works on steep slope requires skilled geotechnical input to ensure that the safety of workers was maintained at all times. Steep and high slopes containing large granite boulders were exposed during construction. The Client demanded Morrison Geotechnic to deliver cost effective and safe temporary stability measures to allow the project to continually operate.

Stabilisation of steep slopes requires heavy excavators, drill rigs and vehicles. Morrison Geotechnic provided temporary works designs to provide safe access for large plant on steep and restricted spaces.