Thrust restraint design of buried pipelines is dependent on internal pressure, piping configuration, and the pipe-soil interaction at the pipe-soil interface. Pipe-soil interface behavior is dependent on the pipe material, native soil and backfill properties, and installation conditions. It is generally recognized that a buried pipe has to move through the soil to develop frictional and adhesive resistance. It also has to move against the soil in order to develop lateral (passive) resistance forces which, in combination with the frictional and adhesive resistance forces, resist the unbalanced thrust. Axial and transverse pipe movements cause additional pipe stresses (axial, shear, and bending) on the pipe at and near the unbalanced forces. The magnitudes of the additional pipe stresses are also dependent on the axial and rotational flexibility of the pipe joints. Traditional thrust restraint design approaches have been based on simplified assumptions that relied solely on force equilibrium concepts that disregarded effects of force-displacement relationships at the pipe-soil interface. In a draft white paper published in 2010, the ASCE Task Committee on Thrust Restraint Design of Buried Pipelines proposed a preliminary unified framework for the design of thrust blocks and thrust restraint systems. The proposed framework consisted of two distinct design solutions for continuous pipelines (welded, fused, etc.) and segmented pipelines (those with some degree of joint flexibility) to accommodate the vast array of joint types used in practice. Advancing the concept further for segmented pipelines, the task committee has undertaken a series of exercises toward fully developing the preliminary unified framework outlined in the draft white paper, which include: the development of an analytical model and software tool; evaluation of alternate pipe-soil interaction concepts; and comparison of the findings against current practice and available experimental results. The concepts and analytical formulations being developed for segmented pipelines would also be applicable for continuous pipelines, as a special case. This paper presents current progress of this analytical model for the case of segmented pipelines, and a companion paper presents current progress for continuous pipelines.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Development of Analytical Model for Thrust Restraint Design - Part 2: Segmented Pipelines



    Kongress:

    Pipelines 2013 ; 2013 ; Fort Worth, Texas, United States


    Erschienen in:

    Erscheinungsdatum :

    11.06.2013




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Development of Analytical Model for Thrust Restraint Design: Part 1 - Continuous Pipelines

    ASCE Task Committee on Thrust Restraint Design of Buried Pipelines | ASCE | 2013



    Soil Structure Interaction Effects in Thrust Restraint Systems of Buried Pipelines

    Rajah, Sri K. / Jeyapalan, Jey K. / Saleira, Wesley E. et al. | ASCE | 2004


    Unified Approach to Thrust Restraint Design

    Jeyapalan, J. K. / Rajah, S. K. | British Library Online Contents | 2007