1-20 of 41
Keywords: lining
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1667
... ABSTRACT: To assess whether reinforcement is required for aged tunnel, it is necessary to clarify the rigidity of the concrete lining as well as the distribution of cracks occurred in the lining concrete. Therefore, a “tunnel lining inspection system” was adopted to photograph, extract, draw...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0309
... ABSTRACT: This paper describes an evaluation of the optimum number of reinforced concrete segments per ring that can best fulfil the tunnel lining function to support the design loads. Hence, the effects of number of segments in the ring were investigated among which the worst case has been...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0968
... ABSTRACT: When shield TBMs in hard rock conditions are applied, pea gravel is used to fill the gap between lining and rock mass. A sound knowledge of the deformation properties is required as only the backfill is considered to be relevant for the bedding effectiveness. At present, no...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-593
... corresponded with the test curves. The variation laws of the plastic zone and deformation in the secondary lining over time were also investigated. Furthermore, the cross sectional shape of the tunnel boundary and thickness of the deformation layer were optimized 1. INTRODUCTION Phyllite is a phyllitic...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-327
... observation method should be applied for the proof of stability and usability. The underground support system consists of a slotted lining with sliding anchors in the areas where squeezing rock is present. This allows converging of the bedrock. During the convergence period a bearing ring is formed within the...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-452
... Abstract: Degradation of lining concrete happens naturally in the tunnels that have been commissioned for several decades, which require proper maintenance to ensure their safety and effective functions. The PCM shotcrete method by means of FRP grid, with the characters of high strength, low...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-482
... Abstract: Tunnels that have suffered severe damage from earthquakes, ground swelling or ground squeezing can be repaired by installing an additional concrete lining according to the degree of their damage. However, the design of the additional lining is based on an empirical approach that...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-123
... pore pressure field around a repository tunnel in the short-term, the dissipation of excess pore pressures in the long-term, the resulting loads in a stiff tunnel lining, and the effects of de- and re-saturation cycles. 1. INTRODUCTION Opalinus Clay is a relatively weak over-consolidated clay rock...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-218
... Characterization concrete liner portal phyllite Acknowledgement extensometer Survey Point lining construction Belden Tunnel Upstream Oil & Gas tunnel 2 operation Canyon geologic mapping slope movement siphon leakage tunnel deformation The Belden hydro-electric project of Pacific Gas and...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-582
... ABSTRACT The elasto-plastic computational models commonly in use predict that lining loading increases with increasing ground strength under certain conditions. This is contrary to the behavior that might be expected on the basis of intuition or tunneling experience. The present paper...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-027
... among the initial deformation rate, the final deformation, the width of loosening zone, and the allowable limit of convergence. Upstream Oil & Gas final deformation ratio diameter Reservoir Characterization rbct relative distance ratio ventilation shaft lining convergence curve...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-146
... ABSTRACT: In weak rock or under high overburden, considerable displacements occur during excavation of tunnels and galleries. The strains developing in many cases exceed the deformability of standard linings, frequently leading to severe damages and the necessity of costly repairs. To allow...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-148
... weak zones, face stability, effects of early age creep in shotcrete and stress redistributions due to the formation of plastic hinges in the shotcrete lining. The design also evaluated forces, moments and rotations in the shotcrete lining to determine ground support requirements. 1. INTRODUCTION 1.1...
Proceedings Papers

Paper presented at the Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS), June 17–21, 2006
Paper Number: ARMA-06-1071
... with a slope height in excess of 150 feet. The shaft is concrete lined and approximately 22 feet in diameter and 75 feet high. Based on a visual inspection, the concrete shaft structure displayed extensive cracking with a crack pattern that appeared to be the result of high non-uniform stresses imposed...
Proceedings Papers

Paper presented at the Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS), June 17–21, 2006
Paper Number: ARMA-06-1097
... the main steel arch support frames and associated foundations. The ground in between these drifts was then excavated in rounds and supported by steel ribs and shotcrete. The final lining consisted of steel members encased in reinforced concrete or shotcrete, including post-tensioned foundations...
Proceedings Papers

Paper presented at the Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS), June 17–21, 2006
Paper Number: ARMA-06-990
... is put on the algorithm for displacement evaluation based on the theory of curved beams, with validation in two and three-dimensional laboratory experiments, together with full-scale applications. memcot lining strain gage construction Artificial Intelligence steel representation...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-1063
... the hydrostatic head buildup. Upstream Oil & Gas hydrostatic head evaluation reinforcement lining grout support system Thickness compressive strength water inflow buildup inflow longitudinal joint strength eccentricity contractor loading tunnel expansion gap tensile...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-1107
...). Upstream Oil & Gas sidewall amplification frequency seismic wave Reservoir Characterization incidence earthquake-induced damage jfz displacement lining Bantaki Tunnel subgrade disturbance dynamic failure tunnel underground structure Earthquake characteristic boundary s-wave...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-1079
... suggested by Bieniawski (1984). Reservoir Characterization structural geology correlation machine learning US government numerical method Artificial Intelligence empirical method tunnel face dowel excavation support system shale lining chamber wall tunnel design process...
Proceedings Papers

Paper presented at the Vail Rocks 1999, The 37th U.S. Symposium on Rock Mechanics (USRMS), June 7–9, 1999
Paper Number: ARMA-99-0617
... ABSTRACT: Innovative ground support agents, in the form of membrane covers, have been developed in Canada and tested internationally for the purpose of partially replacing the screen component of bolts-and-screen or thin shotcrete layers in mines. One polyurethane-based, spray-on rock lining...

Product(s) added to cart

Close Modal