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Browsing by Subject "coefficient of subgrade reaction"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Badania nad wpływem współczynnika podatności podłoża na nośność obudowy wyrobiska podziemnego
    (Wydawnictwa AGH, 2008) Frydrych, Kornel
    Distinguishing feature of the underground excavations' lining (including tunnels) is their cooperation with a rock mass i.e. displacement on the lining and rock mass contact causing the creation of the forces (elastic passive rock mass pressure) which act beside active rock mass pressure. This fact caused that is necessary to take it into consideration in static calculations. Used method has two faults: it doesn't take into consideration both lining structure influence on the value of the coefficient of subgrade reaction and the variation of this coefficient value connected with the changing of the excavation radius in the breakthrough. The paper presents elastic passive rock mass pressure influence on designed distance of steel arch support. The lining structure influence on the elastic passive rock mass pressure value was also discussed.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Wpływ konstrukcji obudowy tunelu o przekroju kołowym na wartość współczynnika podatności podłoża
    (Wydawnictwa AGH, 2005) Frydrych, Kornel
    The existence of elastic passive rock mass pressure significantly increases the bearing capacity of lining, thus it is important to include its effect in calculating internal forces of lining in a tunnel. While designing the lining a designer faces a problem how the construction of this lining influences a value of a coefficient of subgrade reaction. This paper contains computational results of a coefficient of subgrade reaction C for various types of lining in tunnels with a circle cross-section. It has been shown how the construction of lining influences a value of this coefficient.