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Knapsack Gully Underbridge

Project Summary

Client:

AECOM


Brief Project Description:

The Knapsack Gully underbridge located between Emu Plains and Lapstone is an eight-span brick arch bridge. The bridge was constructed in 1912 and is one of the longest brick arch bridges in the NSW rail network.

Our client was commissioned by Transport for NSW to undertake a detailed condition assessment, structural assessment and design development.


DSP’s involvement?

To help facilitate the preparation of assessment and design drawings, DSP was engaged to produce a survey accurate high definition 3D point cloud and Revit model for the existing bridge.

DSP completed the HD laser scanning using modern scanning total station instruments. The survey of the bridge deck could only be completed whilst there was a shutdown of train services for safety considerations.

The existing topographic features (steep and heavily vegetated) surrounding the bridge structure made surveying quite difficult. However, perseverance and good field techniques ensured the survey was completed in a timely and professional manner without the need for any site re-visits.


How did DSP add value to the project? :

Without the services of DSP on this project, our client would not have had a survey accurate base model of the bridge which would not have facilitated the production of accurate assessment and design drawings.

Technology & Capability

DSP are at the forefront of modern technology to capture field data, utilising the latest Leica and Trimble equipment to offer accurate and reliable results.

Such equipment includes high accuracy Total Stations with robotic operation, Laser Scanners, GPS with CORSNET capability, submillimetre digital Levels and data collection loggers for asset management/collection.

A professional suite of office software is employed for processing field data, from in-house developed least squares software and applications to commercial software packages such as Civilcad, 12d model, Bentley MX Road, Trimble Realworks, AutoCAD and Autodesk RECAP. DSP are able to offer a product to suit our clients’ needs.

With a fleet of vehicles compliant to the latest OH&S safety requirements, DSP can operate in all environments. All staff are trained and carry the relevant competencies including Rail Industry Worker, Rail Safety Worker, OH&S general induction for construction work, RMS Yellow Card and Substation Entry.

Technology & Capability

DSP are at the forefront of modern technology to capture field data, utilising the latest Leica and Trimble equipment to offer accurate and reliable results.

Such equipment includes high accuracy Total Stations with robotic operation, Laser Scanners, GPS with CORSNET capability, submillimetre digital Levels and data collection loggers for asset management/collection.

A professional suite of office software is employed for processing field data, from in-house developed least squares software and applications to commercial software packages such as Civilcad, 12d model, Bentley MX Road, Trimble Realworks, AutoCAD and Autodesk RECAP. DSP are able to offer a product to suit our clients’ needs.

With a fleet of vehicles compliant to the latest OH&S safety requirements, DSP can operate in all environments. All staff are trained and carry the relevant competencies including Rail Industry Worker, Rail Safety Worker, OH&S general induction for construction work, RMS Yellow Card and Substation Entry.

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Degotardi, Smith & Partners are consulting surveyors who specialise in small scale residential to large scale infrastructure projects. DSP continues to provide professional services from inception of project to completion.

Our company

 

DEGOTARDI, SMITH & PARTNERS
Consulting Surveyors
1/9-11 Bridge Street
Pymble 2073
NSW
Australia

PH / +61 2 9440 1100
EMAIL / surveys@degotardi.com.au

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