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Upon delivery or before installation of the pipes, they are to be checked with regard to:
Defective components must be rejected and noted accordingly. (Image: Examination of a manhole component before installation) (Image: Determination of damage … |
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The special loads during lifting and transport of the pipes must be taken into account. In particular, transport via a centric stop (cast-in anchor or centrally positioned pipe gripper) activates bending loads for which the pipes must be dimensioned. For pipes with smaller pipe diameters, it is advisable, if possible, to support the pipe via the outer pipe wall or from the inner pipe wall. (Image: Transport of a pipe with a centrally positioned pipe … |
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To facilitate the jointing of the pipes, the socket area should be greased in advance. The lubricant used must be free of plasticizers or other ingredients that could damage the compression seal. Important: Attention: Only the lubricant permitted by the manufacturer may be used. (Image: Greasing the pipe socket to reduce resistance when jointing the pipes together - Image 1) (Image: Greasing the pipe socket to reduce resistance when jointing the pipes … |
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May 11, 2022 (Image: Trench zone - Allocation of compaction equipment)
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May 11, 2022 (Image: Trench zone - Allocation of compaction equipment)
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Stand-alone uplift protection is another option for ensuring uplift safety. In this case, it is not permissible to support the uplift protection against the shoring. Depending on the dimensioning of the uplift safety device, the filling height of the flowable fill can be increased compared with the use of "concrete pipe saddles”. (Image: Stand-Alone Uplift Protection) |
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Stand-alone uplift protection is another option for ensuring uplift safety. In this case, it is not permissible to support the uplift protection against the shoring. Depending on the dimensioning of the uplift safety device, the filling height of the flowable fill can be increased compared with the use of "concrete pipe saddles”. (Image: Stand-Alone Uplift Protection) |
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Another possibility to secure pipes against uplift is the use of ground anchors or tree anchoring systems. The following series of pictures shows the application of ground anchors using the example of the tree anchoring system "Platipus". The required anchoring depth must be determined according to the static requirements (uplift forces) and the soil parameters. Once the ground anchors have been set, they must be checked for sufficient anchoring … |
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Another possibility to secure pipes against uplift is the use of ground anchors or tree anchoring systems. The following series of pictures shows the application of ground anchors using the example of the tree anchoring system "Platipus". The required anchoring depth must be determined according to the static requirements (uplift forces) and the soil parameters. Once the ground anchors have been set, they must be checked for sufficient anchoring … |
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Feb 19, 2021 News Michael Kellner Olea Edge Analytics, an intelligent edge computing platform for the water utility industry, announced an expanded $3.9 million partnership with the City of Atlanta - Department of Watershed Management that is expected to recover millions of dollars in revenue for the utility by monitoring high-value water meters.
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The geology or the existing ground conditions determines the type of excavation tools to be used and their positioning on the cutter head, known as the cutting wheel in soft ground. Pipe jacking in hard rock, such as granite or gneiss, places high demands on the wear resistance of the excavation tools. Here, high material quality of the excavation tools is required, particularly with regard to the hardness and ductility of the steel. In soft soils, … |
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Apr 15, 2024 News Pipe Core Since founding in 2008, Pipe Core’s team has grown across all areas of the business and is now in a position where there are more females than males across the organisation.
Research published in Harvard Business Review found that “countries and industries that view gender diversity as important, capture benefits from it and those that don’t, don’t.”
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Apr 17, 2024 News WiseOnWater An immersive media experience (IMX) may not be what most people want when they think about industrial wastewater, but that is exactly what visitors can expect when they visit a new installation in the city of Kalundborg, Denmark.
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Apr 19, 2024 News Pipe Core Available through Pipe Core, high-quality liner SAERTEX-LINER H20 performed under pressure in São Paulo, Brazil.
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Feb 17, 2021 News Lila Thompson British Water has become the latest organisation to pledge its support to the Change the Race Ratio campaign to accelerate racial diversity in business.
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Feb 18, 2021 News Vicki Losh The 2021 Risk Management in Underground Construction Course will take place virtually on April 13-15. Registration is open and the tentative agenda has been released.
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Jun 25, 2020 News Lila Thompson British Water has welcomed the 2020-2025 Workforce Renewal & Skills Strategy launched by the Energy & Utilities Skills Partnership.
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Jun 24, 2020 News Mar Batista The Grease Contractors Association (GCA) has published simple steps that food service establishments (FSEs) can take to ensure grease management systems can immediately operate effectively and safely after a period of closure.
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Jul 10, 2013 Necessary preconditions for the service capability of a community and urban development are efficient networks of pipelines and cables that provide a secure supply of water, gas, district heating, electricity and telecommunication as well as an ecologically friendly and secure drain and sewer system, i.e. collection and discharge of waste water. However, depending on their degree of connectivity and their actual condition, they must be expanded today … |
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Jul 10, 2013 (Image: Overview of the techniques of trenchless installation of pipelines) Horizontal Directional Drilling methods, in short HDD-methods, form a special group of methods among the steerable methods of trenchless construction (Figure 1) [HDD-1]. This is why they are dealt with separately in this volume [HDD-2] [HDD-3]. Horizontal Directional Drilling was developed for the trenchless installation of cables and pipelines out of the directional techniques … |
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Jul 10, 2013 Among the methods covered in this volume, HDD involving the use of drilling fluid is the most common method for the trenchless installation of pipelines. In all cases a fluid serves for removing spoil. In (Drilling fluid) the tasks of drilling fluid are described in detail [HDD-14] [HDD-15] [HDD-16]. |
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Jul 10, 2013 The following working steps are necessary for carrying out the method (Figure 3a, Figure 3b, Figure 3c) [HDD-12] [HDD-17] [HDD-18]:
(Image: Working steps in HDD – Pilot bore) (Image: Working steps in HDD – Reaming) (Image: Working steps in HDD – Pulling-in) Phase 1: Pilot bore After determining the line and gradient for the pipe(s) to be installed, which – because of the steerable drill head – can occupy a wide … |
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Jul 10, 2013 When space is scarce, flexible pipes such as district heating pipes (see Volume 1, Section 1.1.3 [HDD-1]) and cables as well as plastic pipes supplied in coils (PE pipes) (see (PE-pipes)) are pulled directly behind the reamer and the swivel joint in one piece from the drum or a special pipe coil transport trailer. However, limitations on the pipe diameter that is practical for coiling arise from the permissible bending radius of a particular pipe … |
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Jul 10, 2013 (Image: Installation and layout of a pipe string – consisting of ductile cast iron pipes on a sliding track of steel sheets that are welded together)The pipe string, prepared for pulling-in with regard to the installation instructions of the pipe manufacturer, is pulled-in, in one piece. Roller or slide tracks are used in order to minimize friction of the pipe string on the ground surface and thus to reduce the pulling-in forces exerted by the drill … |
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Jul 10, 2013 This variant of the pulling-in process is used where only limited space is available such as in inner-urban regions and river culverts or inverted siphons with steep banks (see (Drinking water supply line DN 400 in the moorlands between De Meern und Harmelen)). In this case, pipes or pipe strings with restrained plug-in joints (see Volume 1, Chapter 13 [HDD-1]), for instance, ductile cast iron pipes (see (Ductile cast iron pipes)), are connected … |
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