Browsing by Subject "lining"

Now showing 1 - 6 of 6

Access status: Open Access ,
Badania porównawcze metod obliczania obciążeń obudowy wyrobisk korytarzowych niepoddanych działaniu wpływów eksploatacji górniczej
(2007) Wichur, Andrzej; Frydrych, Kornel; Zięba, Agnieszka
The development of underground construction technology in the post-war period in Poland caused the improvement of the technique of driving and lining underground workings, in particular the construction of underground dog heading linings. In order to compare these methods, calculations have been made for 27 analytical variants. The obtained large discrepancies among the calculated values result from the lack of verification of these calculation results with load measurements in situ. It can thus be inferred that sole calculation results cannot be relied upon: carrying out measurements in mine conditions is essential.
Access status: Open Access ,
Obudowa szybów w warunkach znacznych ciśnień deformacyjnych górotworu
(Wydawnictwa AGH, 2009) Chudek, Mirosław; Kleta, Henryk; Wojtusiak, Andrzej; Chudek, Mirosław Dariusz
In the case of occurrence of substantial rock mass pressures on a shaft lining practically impossible is protect a shaft breakout with the aid of the typical construction of a rigid lining. Especially large pressure can occurs in the case of shaft driving through the thick layers of salt, where on the great depth, primary vertical stress exceeds the strength of salt. Increased rock mass stresses also should be taken in to consideration in the case of influence of deformation generated by mining exploitation. The paper presents the constructional solution of shaft lining by make use its load capacity to braking creep of rock mass just after moment of its execution and the solution of lining making possible creep of a shaft cheek with maintain a constant diameter of shaft.
Access status: Open Access ,
Ostatnie doświadczenia tunelowe Przedsiębiorstwa Budowy Kopalń PeBeKa SA ze szczególnym uwzględnieniem zakończonej budowy I linii metra w Warszawie
(Wydawnictwa AGH, 2009) Kozłowski, Robert
In the article author describes previous tunnel projects executed by company Przedsiębiorstwo Budowy Kopalń PeBeKa SA. Tunnels done in different methods are presented (in open trench, cut-and-cover and mining methods). Warsaw metro line I project, which has been just finished takes important place. In Warsaw Bielany district tunnels were executed in shield method, or in deep trench protected by Berliner wall or in use of diaphagram walls.
Access status: Open Access ,
Stress state and bearing capacity of shallow tunnel linings undergoing the influence of nearby located buildings
(Wydawnictwa AGH, 2005) Fotieva, Nina; Bulychev, Nikolay; Sammal, Andrey; Deev, Petr
The paper describes a new analytical method of designing shallow tunnel linings of an arbitrary cross-section shape undergoing the influence of buildings both erected nearby the already existing tunnel and constructed before the tunnel driving. The method is based on analytical solutions of the corresponding elasticity theory plane problems for a heavy semi-infinite medium weakened by a supported opening. The approximate technique is proposed for taking the 3-D character of problems into account caused by limited sizes of buildings in the direction along the tunnel axis and by the location of several buildings on some distances between them in this direction. It gives a possibility to determine the stress state and evaluate the lining bearing capacity in different cross-section along the tunnel axis. Example of the design are given.
Access status: Open Access ,
Stress state of multiple tunnel linings constructed in urban areas with the application of grouting
(2007) Fotieva, Nina; Bulyčev, Nikolaj; Anciferov, Sergej; Sammal, Andrey; Deev, Petr
A method for the design of multiple circular tunnel linings constructed in built-up areas with the application of soil grouting developed at Tula State University is described in the paper presented. The method allows the stress state and bearing capacity of linings to be evaluated under the actions of the soil own weight and the weight of buildings or structures both existing on the surface before the tunnels driving and erected nearly to the already exploited tunnels. The method is based on analytical solutions of corresponding plane problems of elasticity theory and is added by a special technique for approximate taking the 3D character of surface loads into account, caused by limited sizes of buildings in the direction along the tunnel axes and by spatial locations of several buildings in this direction. This approximate approach as well as a possibility of applying the linear solutions for tunnel linings calculations has been validated by comparison of the results obtained with the data from physical and 3D nonlinear numerical modelling. The corresponding software has been developed. Examples of the design are given.
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.