بهینه سازی حفاری تونل های بزرگ مقطع بر مبنای ارزیابی عددی
[1] G. Barla, "Full-face excavation of large tunnels in difficult conditions", Journal of Rock Mechanics and Geotechnical Engineering, Vol. 8, No.3, June 2016, pp. 294–303.
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(PDF) THE RISK OF VERY LARGE SETTLEMENTS DUE TO EPB TUNNELLING
Measures to minimise the risk of large settlements are outlined, and issues related to risk assessment are discussed. . There were 57 incidents in 76.9km of tunnelling, an average rate of one
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Applicability of the Convergence-Confinement Method to
Jan 02, 2019 · Barla G (2016) Full-face excavation of large tunnels in difficult conditions. J Rock Mech Geotech Eng 8(3):294–303. Article Google Scholar Bernaud D, Rousset G (1992) La « nouvelle méthode implicite » pour l'étude du dimensionnement des tunnels. …
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Full-face excavation and construction method: face
Barla [4] examined the full-face tunneling in large tunnels under difficult conditions and stated that when the full section tunnel boring method is possible, existence of many advantages of that
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Face stabilization of deep tunnels using longitudinal
Full-face excavation of a tunnel is currently preferred, even in poor rock masses and in difficult conditions. In this way, it is possible to take full advantage of the potentiality of the machines and large size plants. The problem of face stability, however, is fundamental for the stability of …
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(PDF) • Sharifzadeh M., Kolivand F., Gorbani M.,Yasrobi S
Design of sequential excavation method for large span urban tunnels in soft ground- the case of Niayesh road tunnel project Sharifzadeh et al. 2013 Design of sequential excavation method for large span urban tunnels in soft ground- the case of Niayesh road tunnel project Sharifzadeh Mostafa.a *, Kolivand Farshad.b, Ghorbani Masoud.a,c, Yasrobi Shahabd.
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[PDF] Applicability of the Convergence-Confinement Method
Jul 01, 2019 · The ConVergence-ConFinement (CV-CF) method is widely used in conventional tunneling at a preliminary stage of the design. In this method, the rock–support interaction is simplified by means of a two-dimensional plane-strain assumption. However, when the ground exhibits large deformation and/or when the support is very stiff and installed close to the tunnel face, the results obtained with
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Proceedings - Rapid Excavation and Tunneling Conference
The paper presents the basic concepts in the ADECO approach to design, construction and monitoring of tunnels together with some case histories, including: full face excavation for Cassia tunnel
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The stabilization of the excavation face of a shallow
12 rows · Jun 01, 2016 · Full-face tunneling has been applied in Italy for more than 30 years, with cross-sectional areas
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On the selection of an appropriate excavation pattern for
When full-face tunnel excavation is carried out, stresses and strains do develop in the surrounding rocks, including the "core" ahead of the advancing tunnel face.
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Excavation influence of triangular-distribution tunnels
Sep 24, 2020 · For the Guanshui Road Station tunnel project of Guiyang Metro Line 2, the wind pavilion group was moved out of the main tunnel to reduce the number of openings in the main tunnel, and the wind pavilion group was excavated in a triangular configuration at the entrance of the main tunnel. Based on the finite element software ABAQUS, a three-dimensional model is established to study the …
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Methods of Tunnelling
The full face method is normally selected for small tunnels whose dimensions do not exceed 3 m. In this method, the full face or the entire facade of the tunnel is tackled at the same time. Vertical columns are erected at the face of the tunnel and a large number of drills mounted or fixed on these columns at a suitable height as shown in Fig. 3.2.
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Tunnelling and Underground Construction Technology
• TBM fitted with a full face cutterhead which provides face support by the excavated earth which is kept under pressure inside the excavation chamber. • Excavation debris is removed from the excavation chamber by a screw conveyor which allows the gradual reduction of …
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FROM THE ADECO-RS APPROACH TO THE TUNNELLING - …
1. full face tunnel advance always, especially under difficult stress-strain conditions: due to its peculiar static advantages and because large and powerful machines can be profitably used in the wide spaces available, it is in fact possible to advance in safety with excellent and above all constant advance rates
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tunnels and underground excavations - Tunneling techniques
Because stand-up time drops rapidly as size of the opening increases, the full-face method of advance (Figure 1, centre), in which the entire diameter of the tunnel is excavated at one time, it is most suitable for strong ground or for smaller tunnels.The effect of weak ground can be offset by decreasing the size of opening initially mined and supported, as in the top heading and bench method
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Download full issue. Previous vol/issue. Next vol/issue. Actions for selected articles. Select all / Deselect all. Download PDFs Export citations. Full-face excavation of large tunnels in difficult conditions. Giovanni Barla. Pages 294-303 Download PDF. Article preview.
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Time Dependent Deformations in Squeezing Tunnels | Barla
This paper deals with full face excavation of large size tunnels in rock masses of very poor quality which exhibit squeezing problems. Three different time dependent constitutive models of increasing complexity (a viscoelastic-plastic model, an elastic-viscoplastic model, and an elastic-plastic-viscoplastic model) are used to analyse the tunnel response during excavation of the Saint Martin La
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Excavation of Tunnels - SlideShare
Abstract: Following a few preliminary remarks on the tunneling methods at the beginning of the 20th century, the successful applications of the full-face method also in difficult conditions are underlined. The attention is posed on the use of a systematic reinforcement of the face and of the ground, by means of fiber-glass elements. A selection of tunnels where this method was used
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Large deformations in deep tunnels excavated in weak …
Mar 01, 2016 · Please cite this article as: Barla G, Full-face excavation of large tunnels in difficult conditions, Journal of Rock Mechanics and Geotechnical Engineering (2016), doi: 10.1016/j.jrmge.2015.12.003.
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Research on the Deformation Law of Jointed Surrounding
Mar 18, 2021 · The coupling of the joint network and groundwater in rock under bias conditions has a significant impact on the deformation and failure of the surrounding rock due to tunnel excavation. This paper studies the deformation and failure of surrounding rock after tunnel excavation under different joint network and groundwater conditions. A finite element-based composite joint network modeling
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