Investigation of dam wall deformation surveys

Lynch, Joshua David (2016) Investigation of dam wall deformation surveys. [USQ Project]

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Abstract

Dam walls are monitored by surveyors periodically to ensure that there is no deformation movement within the dam wall. Surveyors have been doing these for years but what determines the quality of these measurements. This research project aims to evaluate Hunter and Fells guidelines using monitoring data and how this guideline can be enhanced with a survey field procedure to produce the best results in the shortest time.

Dam Walls are extremely important assets to the community but pose a large threat to both the environment and people living downstream if the dam wall were to fail. Cressbrook Dam, Cooby Dam and Lake Perseverance are all maintained by Toowoomba Regional Council all situated to the North of Toowoomba. These dam walls need to be monitored using qualitative and quantitative data to ensure they don’t have a breach.

There are many varying opinions on what is the best survey method to conduct a valid deformation survey. The case study data will be utilised to evaluate whether or not Hunter and Fells movement guidelines can be applied for the general surveyor to use. This will involve developing a spreadsheet that can interpret coordinates and organise them in a way to aid the process.

Secondly observations have been done using a robotic and a non-robotic total station. The data has been processed so that the different methods of survey can be analysed in a least squares adjustment using Starnet Software. These survey methods will then be applied to the literature guidelines to determine the most effective procedure of dam wall monitoring.

The key outcomes of this project have been that a suitable excel spreadsheet has been created for easy analysis of survey data to Hunter and Fells guideline. The field work has been completed and the result processed. Some interesting patterns emerged with the robotic total station being much easier to measure, record and export the data. The non-robotic total station produced substandard results but partially produced results similar to the robotic machine. An interesting outcome was that the stations below the monitoring points delivered a height that was differing to the station situated above the monitoring points.


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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Spatial Science (Honours) Major Surveying project
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Supervisors: Liu, Xiaoye
Date Deposited: 20 Jul 2017 23:32
Last Modified: 20 Jul 2017 23:53
Uncontrolled Keywords: dam wall deformation; robotic and a non-robotic
Fields of Research : 09 Engineering > 0909 Geomatic Engineering > 090906 Surveying (incl. Hydrographic Surveying)
URI: http://eprints.usq.edu.au/id/eprint/31436

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