Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Embankment Fill Slope Movement on Thaw Sensitive Permafrost: Combining Creep Testing and Thermal Simulations to Develop Mitigation Options at Lost Creek along the Trans-Alaska Pipeline System; Lost Creek—Part 2
The Trans-Alaska Pipeline System was constructed in the 1970s to transport warm oil through a 48-inch-diameter pipeline (mainline) 800 miles from Prudhoe Bay to Valdez, Alaska. The system traverses continuous and discontinuous permafrost terrain and is supported aboveground or buried, depending on subsurface conditions. The Lost Creek site is a northwest-facing cut and fill slope in discontinuous, warm permafrost. The mainline is supported aboveground by vertical support members (VSMs). Since 1990, Alyeska Pipeline Service Company has observed signs of ground and VSM movement. Movement mechanisms at the site include longitudinal creep movement along a shear zone in ice-rich permafrost and transverse shoulder rotation due to thaw settlement. The movement causes lateral pile loading, VSM displacement, and embankment shoulder failure. This paper presents the methods we used to develop options to mitigate slope movement at the site. We present our interpretation of site conditions in a separate paper within these proceedings.
Embankment Fill Slope Movement on Thaw Sensitive Permafrost: Combining Creep Testing and Thermal Simulations to Develop Mitigation Options at Lost Creek along the Trans-Alaska Pipeline System; Lost Creek—Part 2
The Trans-Alaska Pipeline System was constructed in the 1970s to transport warm oil through a 48-inch-diameter pipeline (mainline) 800 miles from Prudhoe Bay to Valdez, Alaska. The system traverses continuous and discontinuous permafrost terrain and is supported aboveground or buried, depending on subsurface conditions. The Lost Creek site is a northwest-facing cut and fill slope in discontinuous, warm permafrost. The mainline is supported aboveground by vertical support members (VSMs). Since 1990, Alyeska Pipeline Service Company has observed signs of ground and VSM movement. Movement mechanisms at the site include longitudinal creep movement along a shear zone in ice-rich permafrost and transverse shoulder rotation due to thaw settlement. The movement causes lateral pile loading, VSM displacement, and embankment shoulder failure. This paper presents the methods we used to develop options to mitigate slope movement at the site. We present our interpretation of site conditions in a separate paper within these proceedings.
Embankment Fill Slope Movement on Thaw Sensitive Permafrost: Combining Creep Testing and Thermal Simulations to Develop Mitigation Options at Lost Creek along the Trans-Alaska Pipeline System; Lost Creek—Part 2
Hoopes, Oliver (Autor:in) / Croft, Peppi (Autor:in) / Wuttig, Frank (Autor:in) / Schulz, Chuck (Autor:in) / Mathieson, Wendy (Autor:in)
Regional Conference on Permafrost 2021 and the 19th International Conference on Cold Regions Engineering ; 2021 ; Virtual Conference
Permafrost 2021 ; 360-373
21.10.2021
Aufsatz (Konferenz)
Elektronische Ressource
Englisch