... liners, consisting of steel plate and concrete linings, are installed inside the excavated rock caverns (KIGAM, 2011). Compressed air may leak through either initial defects of inner containment liners such as imperfect welding regions and in-situ construction joints of the liners, or through...

... ABSTRACT Concrete lining is at times adopted as part of the support members for mountain tunnels. In the case of concrete lining for road tunnels in particular, concrete lining with a 30 cm width is applied at a standard rate of 10.5mper two days, due to the characteristics of construction...

... ABSTRACT The structural design of permanent reinforced concrete linings of tunnels involves significant uncertainties, principally related to the simplistic representation of the concrete structure interaction with the surrounding geological medium and the inherent limitations pertaining...

... of two types of plug was carried out by investigating the distribution of the factor of safety in the plugs and the distribution of contact pressure over the contact surface between the rock mass and the concrete lining. The analysis was conducted by a FEM code and the results show that the taper-shaped...

... access shaft concrete lining excavation excavation face eastern section lower position mechanical behavior shaft wall minimum value Reservoir Characterization upper position shaft Circumferential stress southern section displacement MPa horonobe underground research laboratory...

... near-fault condition deep tunnel Rock Tunnel Reservoir Characterization information seismic vulnerability lining fragility curve underground structure Earthquake database construction empirical fragility curve ground motion intensity ground motion concrete lining tunnel intensity...

... Pressure tunnels are constructed nurously in related with powerhouse. In some cases, according to high internal water pressure, rock mass around tunnel can seldom suffer this pressure. So installation of concrete lining which interacts with rock mass and suffers parts of this pressure...

... by 1998 and, after that, mining took place in a number of small remnants and in grounds adjacent to the shaft pillar. metals & mining poor quality rock mass concrete lining excavation stratigraphic formation Rock mechanics investigation rock mass vertical shaft extraction shaft pillar...

... analysis method internal friction angle reservoir geomechanics element method Korea cavern Upstream Oil & Gas powerhouse cavern input parameter korea electric company section shape Samrangjin elasticity construction underground finite element method concrete lining rock mass 783 Lim...

.... Numerical algorithm were developed to analyze the behavior of the double lining as well as ground mass separately or simultaneously. Parametric studies and a case history gave the mechanism of cracks prone to occurrence in the vicinity of crown of concrete lining, and available methods to control...

... ABSTRACT: Analytical studies were made on the effects of construction procedure on the tunnel deformation and the long term safety of concrete lining for a large span tunnel in poor rock conditions. The results show that the construction procedure is of ultimate importance in restraining...

... Upstream Oil & Gas diameter steel liner rcc lining tunnel reservoir geomechanics borehole lining Himalaya principal stress displacement pressure tunnel rock mass in-situ stress internal pressure Reservoir Characterization criteria concrete lining stress measurement...

... Reservoir Characterization concrete lining Anchor case study deformation displacement shaft pillar fridge plant room excavation total stress reef plane stress field stress level pump chamber shaft Shaft Excavation installation The influence of geology and stresses on shaft excavations...

... were provided. Reservoir Characterization clayey material gneiss Probe central water commission Face IV Chukha Power Tunnel Wellbore Design Power Tunnel Upstream Oil & Gas concrete lining schist steel support accident Invert rock failure tunnel Crown investigation wangchu...

... purposes, the radius of the tunnel equal to 157 cm, 7 cm being the depth of the point related to the most superficial measure. Upstream Oil & Gas hydraulic chamber formulae diagram tunnel goffi concrete lining expression large-scale test anisotropy radial displacement hydraulic...

... of this support, in situ measurements on the strains both in the inner rings and in the concrete lining were carried out for more than a year at the mine, and the effects of support parameters such as the thickness of the concrete lining and the spacing of steel sets are analyzed with the Finite Element Method...

... been concentrated on reinforced concrete linings, shotcreting, as well as unlined tunnels. This paper presents some critical reviews on the findings from such three chamber tests in more or less similar geological formations of grano-diolite and diorite where severe deformation of the rock and cracking...

... SYNOPSIS: A report is presented on the determination of the rock mechanics for the concrete lining (prestressed by interface grouting) of the upper stage shaft (800 m head) and the steel lining of the lower stage shaft (1500 m head) as well as on the test chamber for a concrete lining...

..., in that the observed behaviour can be interpreted with the aid of computations. Using the example of a tunnel in swelling rock it is shown how a structural solution can be based on measurements. The observed behaviour of a prestressed concrete lining for a pressure tunnel is also described. ZUSAMMENFASSUNG: Durch...

... before excavating the cavity to obtain the design data of the machine hall. Second, the methods and the results of the measurements of the deformations of the rock mass and the stresses in the concrete lining around the machine hall under the excavation are presented. The deformation of the rock mass...