Browsing by Subject "unstable ground"

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Access status: Open Access ,
Oddziaływanie osuwisk na gazociągi
(2005) Wilk, Stanisław; Galas, Marek; Mijal, Marek
The factors influencing landslide formation are discussed in the paper. Landslide structure has been analysed in view of factors causing landslide stabilization. The influence of water on phenomena taking place in an unstable ground with a gas pipeline inside, are discussed. Stresses in a creeping soil, forming a landslide, are analysed. The influence of water filtration through the landslide ground is depicted. A graphical representation of landslide impact on gas pipelines disposed in an unstable ground is discussed.
Access status: Open Access ,
Siły oddziałujące na gazociągi posadowione w niestabilnych gruntach niespoistych
(2005) Wilk, Stanisław; Galas, Marek; Mijal, Marek
The factors influencing the stability of slopes are analysed in the paper. Mathematical dependences for determining the pressure of creeping soil of the slope on a gas pipeline disposed in an unstable soil are determined. During the exploitation of a gas pipeline disposed in unstable soil, the soil moves around the pipeline owing to its compressibility. The movement of the soil around the gas pipeline is proportionate to the increase of soil load (linear dependence of deformation and load). With time, as the soil load increase, the displacement of soil advances, and the soil under the gas pipeline starts being pushed out. A partial increase of shear zones around the pipeline (boundary state) can be observed. Gradually, as the load of the soil increases (mainly due to hydration of the ground), the soil is further displaced and the soil under the pipeline starts being pushed out. A partial increase of shear zones around the pipeline (boundary state) can be observed. Further dislocation of the soil from under the gas pipelines takes place without burdening the soil at a simultaneous pushing out of the soil from under the pipeline and disposal of the soil on the pipeline's surface. Boundary loads are exceeded resulting in further creeping of soil with the gas pipeline.