UNITRACC - Underground Infrastructure Training and Competence Center

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	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Monitoring of the tensile forces Reduction of the cross section A cross section reduction is obtained by reducing the effective circumference of pipe or the effective cross-sectional area. (Image: Overload protection in form of a predetermined breaking point by reduction of the effective pipe circumference) (Table: Overload protection)
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Monitoring of the tensile forces
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting End of lesson Congratulations! You have successfully finished this lesson. Next you will have the opportunity to review the newly acquired knowledge with an interactive questionnaire. You can of course still navigate back to any point in the lessons if you wish to review a specific point or subject. Stay curious!
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting This module is devoted to the pipe bursting as a special method of the replacement of pipelines. In addition, the module looks at the effects that pipe bursting has on the pipeline itself as well as its surrounding environment. Upon the successful completion of this module, you will be able to: identify the effects of pipe bursting on the surrounding environment, calculate the required minimum distances to the adjacent utilities and structures, and identify methods of tensile force control and restriction
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Replacement of drains and sewers Classification in main process groups Replacement: (Definition as per [DINEN752-4]) Construction of a new drain or sewer, on or off the line of an existing drain or sewer, the function of the new drain or sewer incorporating that of the old one. The replacement is always carried out at least in section lengths of the sewer using: Open Cut Method (Image: Replacement of sewers using the open cut method) Semi Open Cut Method (Image: Replacement of a masonry sewer by the semi open cut method …
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Replacement of drains and sewers Classification in main process groups (Image: Overview of replacement methods in trenchless construction) *) Only the pilot boring is steerable during this method. The expansion boring and the following pulling-in or pushing-in of the pipes are non-steerable.
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Replacement of drains and sewers Pipe bursting Terms according to [DWA-M143-15] Bursting head: Tool used in the replacement of pipelines, which can be equipped with breakage-rails, cutting rollers or similar - dependant on the old pipe material. The bursting head can be a part of the expander head. Expander head: The expander head is used for the displacemet of the bursted host pipe into the surrounding subsoil, and also for the creation of an open cross section in which new smaller or larger …
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Replacement of drains and sewers
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Pipe bursting standards and regulations European Standards: DIN EN 752-5: Drain and sewer systems outside buildings (2008-04) DIN EN 12889: Trenchless construction and testing of drains and sewers (2000-03) German regulations: DWA-M 143-15: Rehabilitation of drain and sewer systems outside buildings, Part 15: Replacement of drains and sewer with pipe bursting / not available in english at the present
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Pipe bursting standards and regulations DVGW Regulations: DVGW GW 323: Trenchless replacement of gas- and water-supply pipelines using pipe bursting; Requirements, quality assurance and inspections / not available in english at present RSV-Data Sheets: RSV Merkblatt 8: Replacement of drains and sewers using pipe bursting; Requirements, quality assurance and inspections / not available in english GSTT-Information: Information Nr. 1: Trenchless methods of damage correction in non-accessable drains …
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Process Description (Image: Replacement by trenchless method) Pipe bursting is an environmentally friendly technology used for the in situ trenchless replacement of drains and sewers (pipelines) by applying pneumatic, hydraulic and static energy to fracture and radially displace the host pipeline into the surrounding soil. The replacement pipeline, which can be of similar or larger nominal size, is pulled or pushed in simultaneously.
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Process Description The basic principle behind pipe bursting, developed in the 1980's , is to pull a bursting head with a winch cable or a tension rod through the defect host pipeline, which has been taken out of service, and to thus destroy the pipe walling from the inside and force it radially into the surrounding soil. A new pipeline (casing or product pipeline) which has the same or a larger nominal size is pulled in directly behind the bursting head. Consequently …
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Pipe Bursting variations (Animation) Pipe bursting forces are generated using the following three methods: Static Hydraulic Pneumatic
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Pipe bursting variations Static pipe bursting (Image: Illustration of the static pipe bursting - pulling-in of a continuous pipe) Pulling-in of the new pipeline only using a winch cable or pulling chain and/or pulling- and pushing-rod with accordant pulling equipment in the target manhole / reception pit. Hydraulic pipe bursting (Image: Hydraulic pipe bursting process - pushing-in of discrete pipes) Pulling-in of the new pipeline using a winch cable or a pulling chain and pulling …
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Pipe bursting variations A special form of pipe bursting is referred to as Calibre Bursting. Here come the subsequently proposed static and dynamic pipe bursting methods into application. Calibre bursting uses a bursting head which has a smaller outside diameter than the nominal diameter of the old pipeline. Thus, the introduction of force onto the old pipe walls, and their subsequent displacement, is limited only to sections with cross-sectional reductions (joint displacement, …
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Methods for the insertion of the new pipeline Pulling-in of a continuous pipe (Image: Illustration of the pneumatic pipe bursting - pulling-in of a continuous pipe) Pulling-in of discrete pipes with a smooth outer surface (Image: Pneumatic pipe bursting process - pulling-in of discrete pipes) Pushing-in of discrete pipes with a smooth outer surface (Image: Hydraulic pipe bursting process - pushing-in of discrete pipes)
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Areas of application Requirements for the implementation of pipe bursting: Circular pipe cross section Preferably brittle pipe materials Sufficiently compacted host pipe embedment Straight pipeline route (Table: Areas of application for pipe bursting)
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Areas of application Pipe bursting can be used for the replacement of pipelines which are made of various types of materials (with the exception of pre-stressed and reinforced concrete with heavy reinforcement) exhibiting the following damages: Pipe breakage, Corrosion, Flow obstacles, Unprofessionally performed rehabilitation processes, Deformations, Cracks, Leakage, Mechanical wear. (Image: Longitudinal crack in the region of the pipe joint resulting positional …
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Bursting lengths - gravity pipelines (Table: Bursting lengths - gravity pipelines [FI-Tracta])
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Bursting lengths - pressure pipelines (Table: Bursting lengths - pressure pipelines [FI-Tracta])
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Application limits Application limits are affected by: Pipe– material, nominal size and condition Cover Geological condition Expanding dimension Effects on the environment Distances to crossing or longitudinal pipelines Number of branch connections Major positional deviations (displaced joints / under-bends) Groundwater Concrete bedding and partial / full concete encasement (Image: Encasement and special supports of vitrified clay pipes with concrete with …
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Advantages of pipe bursting Advantages of pipe bursting: Possible application regardless of the host pipe material (with the exception of pre-stressed and reinforced concrete with heavy reinforcement). One bursting operation may encompass multiple nominal pipe diameters. No need for additional excavation through the use of existing manholes . Cross section enlargement of the host pipeline is possible. Rehabilitation lengths up to 300 m. Possible compensation of under or …
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting Disadvantages of pipe bursting Disadvantages of pipe bursting: Applications in groundwater without supporting measures are not, or only conditionally, possible. Possible damage may occur in manhole structures with lower bearing capacities as that of the pushing/pulling forces needed to perform the bursting operation; in such cases additional access pits need to be excavated. The soil in the pipe embedment has to be displaceable and free of obstacles. Risk of damage to the new …
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pipe bursting
	Dec 20, 2013 Modules BE-15 Replacement Module: Pipe Bursting Basics Pneumatic pipe bursting Bursting unit The pneumatic bursting unit generally consists of the following components: Expander head and a pneumatic driving device. An auxiliary bursting cap can be added if required. (Image: Expanding head for pneumatic pipe bursting) (Image: Pneumatic bursting unit) (Image: Pneumatic pipe bursting unit with an auxiliary bursting cap and expander head in the rear; replacement with a HDPE continuous pipe from the insertion pit to the reception pit)