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Dissertations / Theses on the topic 'Tunnel face'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Pan, Qiujing. "Deterministic and Probabilistic Assessment of Tunnel Face Stability." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAI044.

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The main work for Qiujing PAN’s PhD thesis is to develop the stability analysis for underground structures, which contains two parts, deterministic model and probabilistic analysis. During his 1st year of PhD research, he has mainly finished the deterministic model study. In the 2nd year, I developed a probabilistic model for high dimensional problems<br>In the contemporary society, the utilization and exploitation of underground space has become an inevitable and necessary measure to solve the current urban congestion. One of the most important requirements for successful design and construct

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2

Kirsch, Ansgar. "On the face stability of shallow tunnels in sand." Berlin Logos-Verl, 2009. http://d-nb.info/992551668/04.

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3

Cimbali, Giulio. "Stability of the tunnel face reinforced by bolts under seepage flow conditions." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.

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Il presente lavoro tratta la stabilità del fronte di scavo, rinforzato con barre di consolidamento ed interessato da drenaggi in avanzamento, di gallerie sotto falda in rocce tenere o terreni. Tale studio è stato sviluppato dal progetto di Tesi attraverso l’analisi all’equilibrio limite che approssima il fronte di scavo con un rettangolo e considera un meccanismo di rottura composto da un cuneo, a tergo del fronte, caricato da un prisma. Il metodo descritto consente di tenere conto dell’effetto stabilizzante delle barre, mediante una distribuzione della pressione di supporto non uniforme. Nel

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4

Murphy, Michael M. "Defining Stress Changes Ahead of a Tunnel Face and Design of a Data Acquisition System." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/36298.

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With increasing world population, demand for underground construction is expected to accelerate in the future. Design of tunnels in rock is still largely empirical, while rock failure in underground mines and tunnel construction continues to claim lives. A seismic method to aid in increasing safety during excavation is tomography. Seismic tomography is a non-invasive technique to map the stress changes induced by mining ahead of the active face. Seismic tomography maps the velocity distributions of elastic waves traveling through a rock mass. The velocity distributions mapped in the tomog

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5

Murphy, Michael Martin. "Defining Stress Changes Ahead of a Tunnel Face and Design of a Data Acquisition System." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/36298.

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With increasing world population, demand for underground construction is expected to accelerate in the future. Design of tunnels in rock is still largely empirical, while rock failure in underground mines and tunnel construction continues to claim lives. A seismic method to aid in increasing safety during excavation is tomography. Seismic tomography is a non-invasive technique to map the stress changes induced by mining ahead of the active face. Seismic tomography maps the velocity distributions of elastic waves traveling through a rock mass. The velocity distributions mapped in the tomog

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6

SIBOULET, OLIVIER. "Etude de la face (110) de l'arseniure de gallium par microscopie a effet tunnel. Contribution a l'etude des defauts." Paris 7, 1991. http://www.theses.fr/1991PA077086.

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Nous avons observe la face (110) de l'arseniure de gallium par microscopie a effet tunnel. Apres des considerations generales sur la microscopie a effet tunnel et la description du montage, les resultats sont exposes. Nous avons identifie des defauts ponctuels comme les lacunes, les multilacunes, et les complexes de defauts. Nous avons aussi observe des microprecipites d'arsenic et des zones disloquees

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7

El, Jirari Soukaïna. "Modélisation numérique du processus de creusement pressurisé des tunnels." Thesis, Lyon, 2021. http://www.theses.fr/2021LYSET002.

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De nos jours, le recours aux tunneliers à front pressurisé est de plus en plus fréquent, en particulier en sites urbains, où les conditions de creusement de tunnels sont souvent difficiles tant du point de vue géotechnique qu’environnemental. La préservation du bâti et des structures avoisinantes exige donc une garantie de la stabilité de l’ouvrage, une limitation des tassements en surface et un contrôle des impacts sur les structures avoisinantes au cours du creusement. Ce travail de thèse vise à analyser l’impact du creusement aux tunneliers à front pressurisé sur le terrain en développant u

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8

AIRES, JÚNIOR Fernando Antônio de Farias. "Otimização do processo metodológico para aquisição de imagens termográficas da face." Universidade Federal de Campina Grande, 2018. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1598.

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Submitted by Maria Medeiros (maria.dilva1@ufcg.edu.br) on 2018-08-30T11:48:01Z No. of bitstreams: 1 FERNANDO ANTÔNIO DE FARIAS AIRES JÚNIOR - TESE (PPGEP) 2018.pdf: 6311663 bytes, checksum: cc5b79fd4124386db465d6671d163b9f (MD5)<br>Made available in DSpace on 2018-08-30T11:48:01Z (GMT). No. of bitstreams: 1 FERNANDO ANTÔNIO DE FARIAS AIRES JÚNIOR - TESE (PPGEP) 2018.pdf: 6311663 bytes, checksum: cc5b79fd4124386db465d6671d163b9f (MD5) Previous issue date: 2018<br>Este trabalho tem como objetivo otimizar o processo metodológico para aquisição de imagens termográficas da face. A metodologia uti

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9

Zizka, Zdenek [Verfasser]. "Stability of slurry supported tunnel face considering the transient support mechanism during excavation in non-cohesive soil / Zdenek Zizka." Düren : Shaker, 2019. http://d-nb.info/1200808436/34.

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10

Hiebel, Fanny. "Etude de l'interface graphène - SiC(000-1) (face carbone) par microscopie à effet tunnel et simulations numériques ab initio." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00680068.

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Le graphène est un cristal bidimensionnel composé d'atomes de carbone arrangés sur un réseau en nids d'abeille. Ce matériau présente des propriétés électroniques intéressantes tant au niveau fondamental qu'en vue d'applications avec notamment une structure de bande exotique en " cône de Dirac " et de grandes mobilités de porteurs. Sa fabrication par graphitisation du SiC est particulièrement adaptée aux applications électroniques. Nous avons étudié ce système par microscopie à effet tunnel (STM) et simulations numériques ab initio avec comme objectif la caractérisation au niveau atomique de l'

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11

Qarmout, Mahmoud [Verfasser], Torsten [Gutachter] Wichtmann, Markus [Gutachter] Thewes, and Peter [Gutachter] Gussmann. "Tunnel face stability using Kinematical Element Method (KEM) / Mahmoud Qarmout ; Gutachter: Torsten Wichtmann, Markus Thewes, Peter Gussmann ; Fakultät für Bau- und Umweltingenieurwissenschaften." Bochum : Ruhr-Universität Bochum, 2019. http://d-nb.info/120156140X/34.

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12

Janin, Jean-Pierre. "Tunnels en milieu urbain : Prévisions des tassements avec prise en compte des effets des pré-soutènements (renforcement du front de taille et voûte-parapluie)." Phd thesis, INSA de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00743362.

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Dans les années 80, de nouvelles techniques, basées sur la mise en place de système de présoutènements à l'avant du front de taille, se sont développées dans le domaine du creusement de tunnels dans des terrains difficiles. Ce travail de thèse représente une contribution à l'étude des effets de deux types de présoutènements mis en œuvre, le boulonnage au front et la voûte parapluie, sur les déformations du massif et sur la valeur du taux de déconfinement. L'objectif étant d'améliorer les méthodes de prévision des tassements en surface pour les tunnels réalisés avec des techniques de présoutène

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13

PATERNESI, ALESSANDRA. "Numerical analysis of traditionally excavated shallow tunnels." Doctoral thesis, Università Politecnica delle Marche, 2017. http://hdl.handle.net/11566/245437.

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Lo scavo di gallerie rappresenta sicuramente una tra le sfide più impegnative che un ingegnere civile possa affrontare. Ciò è dovuto principalmente alla natura tridimensionale di questo problema di interazione terreno-struttura ma anche alle numerose incertezze che possono entrare in gioco nella progettazione. Recentemente, le tecniche di calcolo numeriche, che permettono una più ampia comprensione del problema, hanno subito un notevole sviluppo, diventando una risorsa fondamentale per la progettazione di scavi in sotterraneo. Tuttavia, solo ingegneri con una buona preparazione numerica son

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14

Alsahly, Abdullah [Verfasser], Günther [Gutachter] Meschke, and Markus [Gutachter] König. "Advanced computational techniques for mechanized tunneling along arbitrary alignments and tunnel face stability analysis / Abdullah Alsahly ; Gutachter: Günther Meschke, Markus König ; Fakultät für Bau- und Umweltingenieurwissenschaften." Bochum : Ruhr-Universität Bochum, 2018. http://d-nb.info/1165304694/34.

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15

Salhi, Mohamed Amine. "Imagerie thermique et thermoélastique de circuits intégrés : application à l'analyse de défaillances." Bordeaux 1, 2006. http://www.theses.fr/2006BOR13295.

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Ce travail décrit le développement d'une instrumentation en mesures thermiques et thermoélastiques pour l'analyse de défaillance sur circuits intégrés, il comporte trois parties: la première partie concerne des mesures interférométriques effectuées avec deux interférométries, homodyne et hétérodyne. Ces interféromètres seront appliqués pour la détéction de points chauds sur des circuits défaillants. La deuxième partie concerne des mesures thermiques effectuées en thermoréflectance. Deux bancs de mesure ont été développés : le premier s'applique pour l'imagerie face avant. Le deuxième entièreme

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16

Zizka, Zdenek [Verfasser], Markus [Gutachter] Thewes, and Adam [Gutachter] Bezuijen. "Stability of slurry supported tunnel face considering the transient support mechanism during excavation in non-cohesive soil / Zdenek Zizka ; Gutachter: Markus Thewes, Adam Bezuijen ; Fakultät für Bau- und Umweltingenieurwissenschaften." Bochum : Ruhr-Universität Bochum, 2019. http://d-nb.info/1191481689/34.

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17

Zapletal, Adam. "Posouzení bezpečnostního celíku u podzemní stavby." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265659.

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The master thesis parametrically compares different methods to determine the required lengths of the safety pillar when building secondary urban collector in Brno. The analytical calculation by Šedivý is compared with mathematical modeling executed in the program Plaxis 2D 2015.02. version and also in the program Plaxis 3D Introductory 2013 version.

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18

Goapper, Sylvain. "Morphologie de surface et ordre chimique : Faces vicinales d'alliage cuivre-palladium." Phd thesis, Université de Marne la Vallée, 1998. http://tel.archives-ouvertes.fr/tel-00243115.

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L'objet de cette thèse a été de caractériser la distribution des marches atomiques sur une surface vicinale d'alliage Cu-17%Pd(1,1,11) de structure ordonnée L12. Cet alliage présente une transition chimique ordre-désordre à 778 K (Tc) (1er ordre). Par une observation directe en STM et par diffraction d'hélium, nous avons observé que la face vicinale a une structure en marches appariées à température ambiante. En fonction de la température, on montre que la morphologie de la surface transite de façon continue vers une structure de marches simples pour une température proche de Tc.<br /><br />La

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19

Grandidier, Bruno. "Contribution à l'étude de faces clivées (110) de semiconducteurs III-V par spectroscopie STM en UHV : application au dopage planaire de silicium dans GaAs." Lille 1, 1997. http://www.theses.fr/1997LIL10112.

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Pour fabriquer des structures semi-conductrices de plus en plus petites, il est nécessaire d'utiliser des techniques d'analyse qui permettent d'observer ces structures a l'échelle atomique. Inventée au début des années 80, la microscopie a effet tunnel semble la technique la plus appropriée pour répondre a cette exigence. Bien qu'elle appartienne aux techniques d'analyse de surface, elle peut toutefois renseigner sur les propriétés volumiques de certains semi-conducteurs III-V, lorsque ceux-ci sont clives pour exposer une face (110) perpendiculaire a la direction de croissance (001). Etudier d

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20

Vendrell, Arasa Alexandre. "SCF cdc4 regulates msn2 and msn4 dependent gene expression to counteract hog1 induced lethality." Doctoral thesis, Universitat Pompeu Fabra, 2009. http://hdl.handle.net/10803/7153.

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L'activació sostinguda de Hog1 porta a una inhibició del creixement cel·lular. En aquest treball, hem observat que el fenotip de letalitat causat per l'activació sostinguda de Hog1 és parcialment inhibida per la mutació del complexe SCFCDC4. La inhibició de la mort causada per l'activació sostinguda de Hog1 depèn de la via d'extensió de la vida. Quan Hog1 s'activa de manera sostinguda, la mutació al complexe SCFCDC4 fa que augmenti l'expressió gènica depenent de Msn2 i Msn4 que condueix a una sobreexpressió del gen PNC1 i a una hiperactivació de la deacetilassa Sir2. La hiperactivació de Sir2

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21

Kim, Seung Han. "Large tunnels for transporation purposes and face stability of mechanically driven tunnels in soft ground." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-08-1722.

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With the advent of the large diameter tunnel boring machine (TBM), mechanically driven large diameter tunnel is becoming a more attractive option. During operation, a large diameter tube allows for stacked deck configuration with shafts dropped to platform level (no station caverns). The extensive information has been compiled on innovative TBM tunneling projects such as the Barcelona Line 9, where the concept of continuous station has been used for the first time, stormwater management and roadway tunnel in Malaysia, where the floodwater bypass tunnel and the road tunnel are incorporated in

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22

Chen, Ching-I., and 陳靜宜. "Observe Performance and Numerical Analysis of Freezing Method on Tunnel Mirror Face." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/eh4qs8.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>95<br>The main purpose of this study is to investigate the behavior of freezing soil and find out an appropriate input parameters for numerical analysis of freezing method in tunneling. Two programs, TEMP/W and FLAC3D, are used to analyze the in-situ freezing experiment in NYUST. It is found that TEMP/W is more appropriate for the simulation of freezing method in tunneling. Then, this research uses TEMP/W program to analyze actual freezing project of tunneling engineering, “Dao-Cha” site of mass rapid transit system in Taipei. The tunnel mirror face of “Dao-Cha” s

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23

Hsueh, Yu-Liang, and 薛有喨. "Face stability and support behavior of a tunnel impacted by weak geomaterials." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/kx2579.

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碩士<br>國立臺北科技大學<br>資源工程研究所<br>101<br>Taiwan is situated on the junction belt of Philippine Sea plate and Eurasian plate, which subjected to collision and compression activities. The geologic is very young and highly complex. Lithology mostly weak in some areas of geological materials, undisturbed support when it is good, such as tunnel excavation disturbed of the stress redistribution caused, and a wide range of rock deformation and thus obstruct the smooth progress of works. Therefore, how to soft rock for the tunnel construction, tunnel engineering in recent years for the domestic extremely i

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24

Jin-an, Jiang, and 江金安. "The Computer System Development For Tunnel Face Image Analysis and 3D Display." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/77791260701962768658.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>88<br>The“NATM”, an excavation method of rock tunnel, is popularly used at the present time. The traditional method of geology record is recorded in the tunnel site by the geologist or the experienced engineers. It is unavoidable to leave out or misjudge that they record the geological conditions in a short time by naked eyes, and to draw a sectional or expanding drawing will be difficult and waste lots of time. Furthermore, the 2D drawing is inconceivable to a real 3D space. For this reason, the purpose of this study is to develop a computer system named

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25

(8842580), Osvaldo Paiva Maga Vitali. "TUNNEL BEHAVIOR UNDER COMPLEX ANISOTROPIC CONDITIONS." Thesis, 2020.

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Rock masses may present remarked geostatic stress anisotropy and anisotropic material properties; thus, the tunnel alignment with the geostatic principal stress directions and with the axes of material anisotropy is unlikely. Nevertheless, tunnel design often neglects those misalignments and; yet, the misalignment effects were unknown. In this doctoral research, tunnels under complex anisotropic conditions were modelled analytically and numerically with 3D nonlinear Finite Element Method (FEM). When the tunnel misaligns with the geostatic principal stress directions, anti-symmetric axial displ

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26

Kao, Cheng-Yua, and 高振源. "A Comparative Study on Auxiliary Methods of the Removal of Mirror Face in MRT Tunnel." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/97296243628512279139.

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碩士<br>國立臺灣海洋大學<br>河海工程學系<br>96<br>This research is to scrutinize the most hazardous sections when shielded tunneling machines are applied in MRT constructions、namely、the parts from the start of excavations with shielded tunneling machines to the removal of mirror faces. Referring to the construction environments of MRT in Taipei metropolitan areas、auxiliary methods have been extensively applied in tunnel penetrations though、information about how and what auxiliary methods are chosen for practical applications is little established. Thus、this research is involved with the comparisons of auxilia

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27

Tso, Wei-Jen, and 左惟仁. "A Study on Non-traditional Auxiliary Methods of Mirror Face Breaking for MRT Shield Tunnel." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/74452461917163304501.

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碩士<br>國立臺灣海洋大學<br>河海工程學系<br>98<br>TBM tunneling method is widely utilized in suburban areas for MRT systems both locally and abroad. But latent risks during launching and arriving of TBM, such as water or sand piping due to poorly controlled quality of the ground treatment works, are very challenging to the engineers. For improve the ineffective and unsafe auxiliary traditional ground treatment methods, this paper will discuss the non-traditional ground treatment methods that are direct cutting method, bulk head chamber method, knock out panel filled with low-strength concrete method and knock

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28

Heidari, Moghadam Mahdi. "Time-dependent Analysis of Jet-grouted Tunnels in Difficult Ground Conditions." Thesis, 2013. http://hdl.handle.net/2152/23381.

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In this study, excavation of jet-grouted tunnels in ground with strong time-dependent behavior is analyzed. The constant growth of population has led to a constant increase in the price of lands and thus infrastructures. Underground alternatives are becoming more economical. Furthermore, advances in the construction technology have made it feasible to construct tunnels in difficult ground conditions. By providing a grouted arch ahead of the tunnel face, jet-grouting has proved effective for the stability and performance of tunnels in difficult conditions. Given the limited depth of jet-groutin

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Chang, Shiu-Lin, and 張淑玲. "Studies of Automated Image Analysis Techniques for Tunnel Excavation Faces." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/80714346845506070555.

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博士<br>國立臺灣科技大學<br>營建工程系<br>95<br>Since tunnel engineering methods are mostly carried out underground and in mountains, the possible difficulties and risks during tunnel construction are higher than other civil engineering construction. Currently, the excavation of domestic rock tunnels is mostly carried out by using the new Austrian tunnel method (NATM). In order to improve the accuracy of the results obtained from the geological survey conducted during the design stage, engineers carry out investigations to ascertain the location and strikes of geological weak planes, such as fault, joint, fr

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YANG, Ming-ching, and 楊明璟. "Preliminary Research on Investigation of Ground Penetrating Radar on Geology fornt of Tunnel Excavatoin Faces." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/22431469939757347417.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>90<br>When executing a tunnel project, the decisions of construction methods and supporting systems depend on the information of geological situations front of tunnel excavation faces. Hence, the accuracy of the geological information will directly affect the safety and schedule of the construction. However, due to the time and cost constraints, some of the current methods may not obtain sufficient geological information, which may incur delay or hazard during the excavation. A convenient, effective collection method of the geological data is required. Ground Pen

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Mokgohloa, Matthews Chuene. "Prediction of the initiation and orientation of the extension fractures ahead of and around faces and walls of mechanically driven excavations and their effect of stability." Thesis, 2017. https://hdl.handle.net/10539/24196.

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Thesis is submitted in partial fulfilment of the requirements for the degree of Master of Science in Engineering to the Faculty of Engineering and the Built Environment, School of Mining Engineering, University of the Witwatersrand, Johannesburg, 2017<br>Boring of shafts and tunnels in hard rock mines is more prevalent in recent years in South Africa. This normally takes place under substantial stress conditions, where fracturing of rock occurs around the boundaries and ahead of advancing faces of excavations. Fracturing can have a significant impact on boring activities, in some instances ca

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