Our site uses cookies necessary for its proper functioning. To improve your experience, other cookies may be used: you can choose to disable them. This can be changed at any time via the Cookies link at the bottom of the page.

Laboratory Modelling of Plastic Landfill Leachate Drainage Pipes


Surface Loading & Deformation

Plastic Pipes Conference Association # 2004 Milan

Rogers, Vasilikos

The structural performance of plastic pipelines used for landfill drainage is difficult to predict due to the complex stress transmission provided by the unusually inhomogeneous overburden (i.e. waste) and variable degrees of local confinement provided by the mounded gravel surrounds. Also the gravel-waste interaction controls the applied stress and degree of support afforded to the pipe-gravel system. Attempts have been made to model such cases using large-scale tests and idealised waste fills combined with finite element analyses, although field measurements demonstrated that the deformed shape in the smaller gravel surrounds differed greatly and classical theory was found greatly to underpredict pipe deformation. Consequently, smaller-scale laboratory tests have been conducted at the University of Birmingham with the aims of recreating the patterns of deformation found in the field and defining support mechanisms. Simulated waste was created to produce an accurate and repeatable degree of compression. Model tests were then carried out in a rigid steel box with a glass face through which photographs of the pipe, gravel mound and overlying waste were taken. This paper aims to describe the test procedures and the first results emanating from this test programme, and thereby to demonstrate that some of the patterns of deflection seen in the field can be recreated by careful variation of installation procedures. When combined with the field measurements, it is possible to determine the structural action of the pipes in different construction and loading scenarios and to make recommendations for the design and installation of such pipes in practice.

Please note that the whole article content is available on PPCA website only :

Related papers

1995 Edinburgh : Critical Review of the Creep Stiffness Test for Structured Wall Pipes

Author(s) : Evans, Loeppky, Rogers

This paper, the first of a series on the subject, is a critical review of the creep stiffness tests performed on structured wall pipes in the UK. The review is timely in light of proposed changes to creep stiffness criteria, and associated test methods, and the imminent publication of a new specification for...

Members of the Association

BOREALISBOROUGEFormosa Plastics CorporationHanwha TotalEnergiesINEOS O&PIRPCKorea Petrochemical IND. Co., LTD (KPIC)LyondellBasellORLEN UnipetrolPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE