A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Planning, Design, and Constructability Aspects of Longer Trenchless Drives for Gravity Sewer Installations
Trenchless construction for gravity flow installations presents considerable challenges as well as opportunities for the planners and the constructors. The need to achieve accuracy of line and grade, prediction and control of jacking forces, and ensuring structural integrity of installed pipes are some of the key issues that determine efficient and effective outcomes for longer jacking drives. As drive length increases, so is the likelihood of encountering complex geological conditions, and increased difficulties with controlling the alignment of the pipe string. This paper discusses how these issues were addressed in the planning study for the Bulimba Creek Trunk Sewer in Brisbane, Australia. For the 4.2 km long DN1500 gravity trunk sewer, up to 500m long drives were planned to avoid deep intermediate shafts in elevated and difficult to access topography. The shear interaction between pipe walls and ground, influence on jacking forces of key ground properties; and deformations of the overcut annulus around pipe were studied. The results were used to calculate jacking loads, estimate realizable drive lengths and planning shaft locations. Superior project outcomes with respect to design approach, constructability and environmental impacts were achieved for a deeper alternative alignment than originally intended.
Planning, Design, and Constructability Aspects of Longer Trenchless Drives for Gravity Sewer Installations
Trenchless construction for gravity flow installations presents considerable challenges as well as opportunities for the planners and the constructors. The need to achieve accuracy of line and grade, prediction and control of jacking forces, and ensuring structural integrity of installed pipes are some of the key issues that determine efficient and effective outcomes for longer jacking drives. As drive length increases, so is the likelihood of encountering complex geological conditions, and increased difficulties with controlling the alignment of the pipe string. This paper discusses how these issues were addressed in the planning study for the Bulimba Creek Trunk Sewer in Brisbane, Australia. For the 4.2 km long DN1500 gravity trunk sewer, up to 500m long drives were planned to avoid deep intermediate shafts in elevated and difficult to access topography. The shear interaction between pipe walls and ground, influence on jacking forces of key ground properties; and deformations of the overcut annulus around pipe were studied. The results were used to calculate jacking loads, estimate realizable drive lengths and planning shaft locations. Superior project outcomes with respect to design approach, constructability and environmental impacts were achieved for a deeper alternative alignment than originally intended.
Planning, Design, and Constructability Aspects of Longer Trenchless Drives for Gravity Sewer Installations
Bhargava, Raghvendra (author)
International Conference on Pipelines and Trenchless Technology ; 2012 ; Wuhan, China
ICPTT 2012 ; 1963-1976
2012-11-13
Conference paper
Electronic Resource
English
Inspection , Installation , Trenchless technology , Risk management , Infrastructure , Corrosion , Leakage , Sewers , Rehabilitation , Australia , Jacking , Pipelines , Monitoring
Trenchless Technology Aids Sewer Installation
Online Contents | 1994
Evaluation and Planning of Trenchless Sewer Alternatives in Venezuela
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