Numerical Methods For The Analysis Of Tunnel Performance In Squeezing Rocks

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A support vector regression model for predicting tunnel

squeezing, swelling and high water inflows [2]. In addition, tunneling is a high-risk industry covering geological, operational, physical and financial risks which are growing with the increase use of mechanized tunneling. From the beginning of a tunnel excavation and during the tendering of a tunnel project, the performance of a TBM has to be

The three stages of stress relaxation - Observations for the

Tunnel squeezing (Barla, 1995) is an observable result of one or more of the mechanisms above and is the inelastic closure of the tunnel profile with or without tunnel advance. Some component of total squeezing can be instantaneous (in practical terms) as a result of short-term

INNOVATIVE TUNNELLING CONSTRUCTION METHODS IN SQUEEZING ROCK

weak rocks), rock mass characterisation, numerical modelling and back analysis, performance monitoring, slope stability, rock-structure interaction for underground workings and tunnels, surface and underground mining. He is Editor of Rock Mechanics and Rock Engineering , SpringerWienNewYork.

ITA WORKING GROUP No 17 ON LONG TUNNELS AT GREAT DEPTH

profiles, for instance, in swelling and squeezing rocks. For railway tunnels, the space to be secured above the rail level is settled by the loading gauge (clearance profile) and by the free section, depending on the train speed, the safety and the comfort of the passengers For high speed trains, over about 160 km/h : numerical

PROCEEDINGS OF THE SEVENTH INTERNATIONAL SYMPOSIUM ON

Design of the Bolu Tunnels - Numerical analysis of tunnels in highly squeezing ground 359 W.Unterberger, D.Burger & GJedlitschka Strategy for dimensioning shallow NATM-tunnels 367 W.Wu&E.X.Saraiva Direct estimation of initial stresses of the ground around a tunnel 373 M.Hisatake

Performance monitoring and analysis of a yield-control

jects using conventional excavation methods. The Saint Martin access adit excavated in a Carboniferous Formation along the Base Tunnel of the Lyon-Turin rail line is presented as a case study. Numerical analyses are discussed to compare the results of computed and measured performance of a typical monitored section

Numerical study on Optimization of key parameters for better

to the pressure distribution between cutters and rocks, a well-known cutting force prediction model was established by Rostami and Ozdemir[5],[6]. The influence of s/p on cutting forces and cutting performance are systematically studied in a linear cutting test with multiple geological conditions by Gertsch etc.[7].

Contents lists available at ScienceDirect Journal of Rock

rock engineering, geotechnical engineering, tunnel engineering and numerical modelling. He has been active in promoting continuum education courses in Rock Mechanics and Rock Engineering since 1986, which resulted in the publication of 10 books on various subjects including tunnelling, slope stability, performance monitoring, and rock

Institutt for geologi og bergteknikk Doktorgradsavhandlinger

squeezing. Trinh, Quoc Nghia, 2006: Analysis of cave-in problem in a hydropower tunnel. Ellefmo, Steinar Løve, 2005: A probabilistic approach to the value chain of underground iron ore mining. From deposit to product. Gaut, Sylvi, 2005: Factors influencing microbiological quality of groundwater from portable

Numerical Analysis of Lining Hinge in Tunnels

IV. NUMERICAL ANALYSIS OF LINING HINGE IN CIRCULAR TUNNELS This analysis about the tunnel with diameter of 4 m is as follows: A. MODELING OF TUNNEL IN THE CASE OF LINING WITHOUT HINGE In this case, a lining composed of beam elements with Young s modulus of 30000 Mpa and Poisson s ratio of 0.2 and

Missouri University of Science and Technology Scholars' Mine

moderately squeezing and highly squeezing, were identified by relating the strength-stress (cr,m/Po) ratio to the development of plastic zone extent and the amount of tunnel closure. Actual case histories of tunneling in Taiwan show that this criterion predicts the tunnel performance quite well.

Flowchart of DEM Modeling Stability Analysis of Large

brittle rocks. Brittle failure or elastic-plastic continuum of squeezing and swelling rocks. Analysis of the stability Of these excavations depends primarily upon an interpretation of the structural geological conditions in the rock mass followed by a study of the blocks and wedges which can be released by the creation of the excavation. DEM

Ŕ Periodica Polytechnica The Dangerous Condition of Ground

of the tunnel has been partitioned into sections using the inter-preted geological, geophysical studies and borehole data. After evaluating rock burst and squeezing potential with alternative analytical and experimental methods for each section, the re-sults of di erent methods were compared with each other. Re-

Influence of face reinforcement and shotcrete support on

was successfully employed during tunneling in squeezing conditions (e.g., in soft rocks under high overburden stress). 2.2 Design and performance The design of the tunnel was based on the

Ahmad Fahimifar - Amirkabir University of Technology

27 Compare performance of the shotcrete lining reinforced with steel and polymer strands in the tunnel under different Reaza Babaei & Ahmad Fahimifar September 2017 28 Comparison of analytical and numerical methods elasto plastic behavior of tunnel under nonisotropic stress Sayed Sepehr Nikooei & Ahmad Fahimifar September 2017

Development rock behavior index around underground space

stability by numerical analysis. Many researchers studied the rock behavior around the underground space. Klein provided guidelines that can be used to accurately classify the performance of the weak rock in tunnels (Kelin, 2001). Yoo and Song quantified the rock behavior around shallow tunnel using analytical hierarchy process

INDOROCK 2016 Proceeding - ResearchGate

33 Tunnel Induced Ground Stability for EPB-TBMs 487-496 34 Numerical Simulation of Behavior of a Tunnel in Squeezing Rock 497-507 35 Design and Construction of Twin Highway Tunnel on Gomati

TUNNELLING IN ROCKS PRESENT TECHNOLOGY AND FUTURE CHALLENGES

Seikan tunnel (1972-88), 54 km long with undersea length of 23 km. Gjovik cavern (1991-1993), largest rock cavern of 61 m span. Channel tunnel (1994), 52 km long with longest undersea length of 39 km, by TBMs. Gotthard base tunnel, longest tunnel (57 km), with maximum overburden of 2.4 km, 90% by TBM. Niagara tunnel, with largest rock TBM, ø14

Geotechnical Engineering Design of a Tunnel Support System

The analysis of rock mass strength, geological problem related to tunnel construction and designing appropriate support system for Bheri Babai Headrace Tunnel (BBDMP) is presented in the paper. Tunnel squeezing and rock burst is checked before design of support system. Rock mass classification system (Q

'Rock Engineering and Tunnels- a Nordic approach'

Applying 2d for 3d finite element analysis in the bangkok mrt blue line south extension project Lueprasert P., Suwansawat S., Jongpradist P., Thailand A compact design for shaft-tunnel junction adopted for Greater Cairo Metro Line 3. Design aspects and use of advanced numerical method. Giuliani-Leonardi S., Gastebled O.J., Mahdi S., France

1 Rock mass classification - Rocscience Inc.

Squeezing rock slowly advances into the tunnel without perceptible volume increase. A prerequisite for squeeze is a high percentage of microscopic and sub-microscopic particles of micaceous minerals or clay minerals with a low swelling capacity. Swelling rock advances into the tunnel chiefly on account of expansion. The capacity

TBM TUNNELLING IN ROCK: GROUND PROBING AND TREATMENTS

of a tunnel under geo conditions of great uncertainty, Figure 1: Example of TBM utilization in the excavation of a 3.5m diameter and 7km long tunnel in Hong Kong in good rock mass conditions (McFeat-Smith and Concilia, 2000). Figure 2: Example of TBM utilization in the excavation of a 3.5m diameter tunnel

46th US Rock Mechanics / Geomechanics Symposium 2012

ISBN: 978-1-62276-514-0 46th US Rock Mechanics / Geomechanics Symposium 2012 Chicago, Illinois, USA 24-27 June 2012 Volume 1 of 4 Editors: Antonio Bobet

Giovanni Barla Short CV

methods - 13 th International Conference of the International Association for Computer Methods and Advances in Geomechanics, Melbourne (Australia), 9 - 11 May 2011, pp. 817-822 (A. Perino) Analysis of the behaviour of a yield-control support system in squeezing rock -

Numerical simulations of tunnelling in soft rock under water

tunnels in soft rocks. Herewith, a short review illustrates the basic principles governing the influence of the pore pressure on the soft rocks behaviour and underground excavation performance. Then, the main ways for the tunnel equilibrium analysis are presented and discussed by assuming short and long term conditions.

Publications by Dr C

Underground Space Association (ITA-AITES) World Tunnel Congress, Budapest, Hungary - 23-28 May, 2009 25) Kontoe S, Zdravkovic L, Potts D.M and Menkiti C.O (2009) Comparison of constitutive models through a case study on seismic response of tunnels , Proceedings of International Conference on Performance-Based Design in Earthquake Geotechnical

INTERNATIONAL JOURNAL OF GEOMECHANICS Vol. 12 2012

689 Numerical Simulation of Interactions between the Shield-Supported Tunnel Construction Process and the Response of Soft Water-Saturated Soils / Felix Nagel, Janosch Stascheit, and Günther Meschke 697 Time-Dependent Modeling of Tunnels in Squeezing Conditions / Giovanni Barla, Daniele Debernardi, and Donatella Sterpi

A NUMERICAL APPROACH TO SIMULATE STRESSES AROUND TUNNELS IN

modelling method to simulate the performance of the support sys-tem in swelling and squeezing rocks. In their research, they pre-sented in-situ measurements and time-dependent numerical analy-sis of non-deformable support system and employed a modified Cam-Clay constitutive model (Soft-Soil Creep Model) for model-ling high deformable rocks.

Table of Contents

Time Dependent Numerical Analysis for Investigation of Entrapment Risks in 275 DS-TBM Tunnelling in Squeezing Grounds Hossain M. Shahin, Teruo Nakai and Sho Kuroi Tunnel Behavior Subjected to Repeated Shear Deformation-model Test and 283 Finite Element Analysis Numerical Simulation of Construction Processes in Mechanized Tunneling

The Interaction Between Shield, Ground and Tunnel Support in

the Ghomroud Tunnel (Iran, D = 4.50 m) and the Nosoud Tunnel (Iran, D = 6.73 m). The performance of TBMs in squeezing ground can also be assessed by evaluating and correlating the operational parameters of the TBM. This was done, e.g., by Kawatani et al. (1999) for the Takisato Tunnel (Japan, double shielded TBM, D = 8.30 m) and by Farrokh and

UNIVERSITI PUTRA MALAYSIA

2.3 Stability Analysis of Tunnels Using Numerical Modeling 22 2.3.1 Numerical Analyses 26 2.3.2 Different Methods Used in Solving the Tunnel Problems 31 2.3.3 The Application of Numerical Modeling in Tunnel 33 2.3.4 Finite Element Method (FEM) 36 ©

ResearchonSupportingMeasureatIntersectionofInclined

sections on the tunnel performance, and proposed support design suggestions for different geological conditions. Lin et al. [11] conducted the stability analysis of large-span tailrace bifurcation tunnels and proposed a new nonlinear reinforcement analysis method, which was used in the de-sign of reinforced concrete lining and rock bolts.

Antonio Bobet School of Civil Engineering Purdue University

Squeezing Ground - From Basic Thoughts to Continuous Tunneling Proceedings of the World Tunnel Congress '97. Vienna, Austria, pp. 619-632. 4. *Sagong, M. and *Bobet, A. (2000). Coalescence of Multiple Flaws in Uniaxial Compression. Proceedings of the North American Rock Mechanics Symposium: Pacific Rocks 2000, pp. 1203-1210. 5.

SÜRELİ YAYINLAR - MADEN

171 Numerical Methods for the Analysis of Tunnel Performance in Squeezing Rocks Gioda, G.,Cividini, A. 195. Behaviour of an Adit Excavated Through a Sandstone-Shale Succession Huergo, P.J.,Schmidt, S 203. Basic Considerations on Tunnelling in Squeezing Ground Kovarı, K., Staus, J. 211. Tunnelling in Squeezing Rocks Case Histories Steiner, W

Contents lists available at SciVerse ScienceDirect Journal of

A. Bond et al. / Journal of Rock Mechanics and Geotechnical Engineering 5 (2013) 44 57 45 N Motorway tunnel Security gallery Scale 0 20 40 60 m Micro-tunnel

SOME REFERENCES of published papers - RockMass

29. Amstutz E. (1970): Buckling of pressure shaft and tunnel linings. Water Power, November 1970, pp. 391-399. 30. Anagnostou G. and Cantieni L. (2007): Design and analysis of yielding support in squeezing ground. Proceedings of 11. th ISRM congress, The Second Half-Century of Rock Mechanics, July 9 13, 2007, Lisbon, Portugal, 4p. 31.

Course Structure & Syllabi M. Tech. (Tunnelling and

Tunnel Services: Ventilation, drainage and pumping. Methods of Sinking Shafts: Vertical and inclined, decline; shaft/raise boring machines and their application. Tunnelling Hazards: Explosion, flooding, chimney formation, squeezing ground. Code Subject Name L-T-P Credit AMC-51101 ADVANCED NUMERICAL METHODS AND APPLIED STATISTICS 4-0-0 8

Underground - the way to the future : proceedings of the

Tunnel conditionsassessmentbasedon image analysis: anewinspection procedure for railwaytunnels 70 F. Sandrone Newtunnel inspection and maintenancestrategy using3Dlaserscanning 71 T. Yoshida, Y.Adachi&K. Hayashi Evaluationmethodofthefalling ofconcretepiecefrom tunnel lining 72 K. Tsuno, Y. Kojima, T. Nakayama&T. Ushida

STUDY ON THE BEHAVIOUR OF NATM TUNNEL FACE DURING SEISMIC

0.25% of tunnel height = 25 mm in this study (to ensure a sufficiently stable tunnel face). After several trials in order to have a stable face the following support measure (Table 4) is arrived at.