Buried Plastics Chambers - Performance

Plastic Pipe Design # 2006 Washington DC

Plastics pipes products are more and more appreciated in sewer schemes throughout the world. The advantages of thermoplastics, like the good resistance against sewer environments and the possibility to built complete tight systems are many times the drivers to use thermoplastic pipes and chambers. Plastics chambers however are more complex then pipes. Where in solid wall pipes the structural performance is determined by two directions, in chambers this is threedimensional. Hence also the stresses and strains are of a more complex nature. The loading and loading condition is quite different for chambers when compared to pipes. Now three dimensional stress/strain conditions are present, and the product is placed vertically in the soil. ASTM F1759 (1) prescribes the loads and stresses on the manhole. Although the design rules are transparent and straightforward, they are of general nature and do not involve possibilities to calculate strains and stresses in the more complex chambers. It would be possible to use FE analysis for this purpose, but there are too many uncertainties and this kind of analysis might be useful for design, it is not for certification of the product. If the actual loading and functional performance of the chamber is used as the basis, then it is possible to design tests to check the integrity of the manhole or chamber. This approach has been followed in Europe and some of it has been reflected in drafting European standards. As an example the cover-load test, the ring stiffness test, shear load test, Base-buckling test and a durability test for the base are under development or have already been finalized. This paper shortly describes the tests and the results that are gained with it. It will also explain the importance of focussing on the functional performance of chambers.

Please note that the whole article content is available on PPCA website onlySource : 2006 Washington DC


Related papers

DESIGN OF LARGE DIAMETER BURIED PIPES

Author(s) : Anders Andtbacka, Frans Alferink, Peter Sejersen 2018 Las-Vegas

The behavior of buried plastic pipes is already well described in standards and technical specifications and as well as proven in real life conditions. Plastics pipes in diameters up to around 400 mm are already in use for more than 60 years and pipes with larger diameters for more than 20 years now. All with good...

THE EXPERIENCE WITH THE USE OF UPVC PIPES IN VARIOUS BURIED APPLICATIONS

Author(s) : Frans Alferink 2016 Berlin

PVC pipes for buried applications for water, sewer and gas, has developed an excellent track record. PVC is very inert, has a high resistance against permeation of soil contaminations and gas components and meanwhile has a long proven lifetime. Next to that, the lifecycle costs of buried PVC pipe systems are amongst...

PVC-O: Expanding in Technology and Application

Author(s) : André Nijland, Frans Alferink 2014 Chicago

PVC-U is used around the globe for potable water supply and sewer applications. This is due to its strength and stiffness as well as to its excellent flow properties. PVC-U shows an excellent performance in protecting the potable water quality. And it is registered that failure rates of PVCU pipelines are very low....

PVC-O PIPES FOR WATER AND WASTE WATER APPLICATIONS: STANDARDISATION, QUALITY AND APPLICATIONS

Author(s) : Frans Alferink and Jos Oosterik 2012 Barcelona

PVC-O pipes were already introduced in the mid-seventies, but why did it take until the beginning of this century before this high quality pipe product really expanded successfully into the water markets? The second part of this paper will present an answer to that question. Feedback from various pipe markets around...

Combined Loading of Buried Thermoplastics Pressure Pipes

Author(s) : Janson, Alferink, Wolters 2004 Milan

This paper presents the results of work that was performed at the request of TEPPFA , The European Plastics Pipes and Fittings Association, on the issue of “Combined loading” (external and internal loading) of buried thermoplastics pressure pipes. The work is of great importance for users and designers of...

Performance of Buried Plastics Manholes

Author(s) : Alferink 2001 Munich

When starting with the application of buried thermoplastics pipes in the fifties, Wavin started to gain a lot of experimental experience with these pipes, which later formed a solid base for the correct application of thermoplastics pipes. In analogy, a lot of experimental experience is gained now with buried manholes...

Soil-Pipe Interaction A Next Step in Understanding and Suggestions for Improvements

Author(s) : Alferink 2001 Munich

Two papers dealing with the intermediate results of the TEPPFA / APME project on design of thermoplastics pipes has been published at the 10th Plastics Pipes Conference in Gothenburg in 1998 by Alferink et al.1, 2 Meanwhile the study has been almost completed and the results discussed with several experts. Pipe...

Design of Thermoplastics Pipes

Author(s) : Alferink, Janson, Olliff 1998 Gothenburg

Extensive field trials are being performed in a project sponsored by TEPPFA and APME,to obtain well documented information about the behaviour of buried thermoplastics pipes. as outlined in the paper by Alferink, Bjorklund and Kallioinen (Ref 1). This information is of vital importance to obtain a workable design...

The Design of Thermoplastics Pipes

Author(s) : Alferink, Bjoerklund, Kallioinen 1998 Gothenburg

Over the last 15 years several attempts have been undertaken to establish a design method for plastics pipes (IS0 TC138 WG13) and over the last ten years to establish an unified design method for all buried pipes (CEN TC1641165 JWGI). Several national methods are available and it is shown over the last ten years that...

Old PVC gravity sewer pipes Long Term Performance

Author(s) : Alferink, Guldback, Grootook 1995 Edinburgh

Wavin gained a lot of experience with operational PVC sewer pipes by monitoring installations and measuring pipe deflections over a period of about 35 years, as reflected in the database "PiPer". Some of the oldest pipes have been measured and dug up now to study the durability of these pipes. Furthermore the results...

Effect of Installation Conditions on Buried Plastics Pipes

Author(s) : Alferink, Wolters 1992 Eindhoven

Results of deformation measurements carried out on buried plastics pipes installed at six different tests sites are discussed in this paper. The results show that the deflection of buried pipes is usually rather small and the time dependence is limited to a few years after installation. Traffic loading does not result...

Deformations in Buried Flexible Pipes

Author(s) : Alferink, Wolters 1988 Bath

Knowledge about the behaviour of buried flexible pipes has become more and more important in the Netherlands. It serves several objectives, for instance, to evaluate stress corrosion, installation techniques and new materials, as well as drawing up new design codes and test procedures for pipes and components. This...

Jointing Methods for PE Casing Pipes of District Heating Systems

Author(s) : Alferink, Blom, Venema, Wolters 1985 York

Joints in PE casings of district heating pipelines are made by extrusion welding, butt welding or sleeves in which sealing is obtained by an adhesive. To set up guidelines for making these joints a lot of research has been performed, part of which is described in this paper. Joints of a good quality are obtained if...

The Application of PVC-O Pipes for Water Supply and Pressure Sewage

Author(s) : Alferink 2008 Budapest

Members of the Association

BOREALISBOROUGEINEOS O&PIRPCKorea Petrochemical IND. Co., LTD (KPIC)LyondellBasellPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE
TOP