... Abstract The article provides a summarised report about the redesign of the 8822 m long Boßler Tunnel from the originally intended shotcrete method to a mechanically driven tunnel. The twin-bore Boßler Tunnel is the main contract on the Albaufstieg (Alb ascent) section of the new DB line from...

... Abstract Authors have practiced inclination monitoring at the tunnel crown during face advance as one of the methodologies to predict qualitatively ground deformability ahead of the face. This paper describes the improved methodology to realize the quantitative estimation of tunnel crown...

... Abstract In the underground construction of tunnels, high precision of convergence and settlement measures are necessary, and the employment of the total station can attain this goal. The resultant errors of the precision of the total station are evaluated, considering its linear and angular...

... Abstract Frequent changes in power production from hydropower plants is an increasing phenomenon caused by ever-changing prices in the power market. Frequently changing power output results in significant pressure fluctuations and unsteady flow in the waterway. In an unlined hydropower tunnel...

... and befor loosing the access) of the power house and transformer caverns (PHC and TC). displacement excavation residual displacement bond load-displacement reservoir characterization diameter rock mechanic tunnel elastic displacement hazrati aghchai 2017 upstream oil & gas corrosion...

... Abstract When the axis of the tunnel is not parallel to one of the far-field (geostatic) principal stresses, far-field axial shear stresses are present, which distort the tunnel in the axial direction and affect the stress paths of the ground near the face of the tunnel. The goal of the paper...

...-making frameworks. Probabilistic and supervised machine learning are two examples of methods that may be used to streamline data review for an expert user. This paper uses the backdrop of a tunnel case study to compare a Bayesian Belief Network (BBN) to predict the ground class as a function of tunnel...

... and localized deformations taking place in a specific tunnel section. The second one is called Rad Array and it is designed to be installed in radial directions with respect to the tunnel section, in order to identify deformations some meters inside the rock mass surrounding the underground excavation...

... Abstract To study the distribution of structural planes of deep hard rock around underground tunnels and its influence on the failure of surrounding rock, the spatial distribution characteristics of structural planes around typical laboratory of the CJPL-II were identified and analyzed through...

... Abstract ETH Zürich is establishing an underground geoscience laboratory in the Bedretto Tunnel located in the Swiss Central Alps. The purpose of the laboratory is to host meso-scale in situ experiments with the focus on hydraulic stimulation (geothermal energy) and fault reactivation (induced...

... of support in tunnelling. 1 Introduction Fault rocks have low strength, high deformability and can be water bearing. Thus, they are prone to squeezing. According to ISRM (1995) squeezing is the time dependent large deformation into the tunnel of the surrounding rock , caused by exceeding a limiting...

... development in the headrace tunnel of Moglicë hydropower project. The aim is to determine the behavior of the rock mass after water filling of the tunnel and during the first year of operation. The monitoring rig installed will continuously record pressure and deformation development in the rock mass behind...

... Abstract "Conventional" monitoring instruments installed in and around tunnels and on the ground surface are introduced together with "advanced" equipment, e.g. robotic total station, interferometric synthetic aperture radar, and 3D laser scanning. It is shown that the monitoring data can...

... have focused on: the existing fracture sets; their geometric, kinematic and structural complexity; conformity between sampling scales and; aperture properties thus allowing to correlate boreholes, outcrops, tunnels and the sub-regional scale. Additionally, the "freshness" of fracture surfaces...

... Abstract The China Railway Bureau has maintained and operated the Konglunshan (KLS) and Fenghuoshan (FHS) tunnels of the Qinghai-Tibet Railway on the Tibetan Plateau since 2001. The two tunnels have been driven through permafrost, and serve as unique laboratories to study tunnelling...

... Abstract In order to evaluate the impacts of shield tunneling (referred the Sutong GIL project) on the stability of the levee and control its settlements, this study adopted the neural network and regression analysis to analyse settlement data of the levee derived from the numerical simulation...

... Abstract The design and construction of a road tunnel must include variables, parameters and components related to the type and use of the tunnel. If in the vicinity of the project there is another tunnel and infrastructure with high sensitivity, the design has a greater complexity. The road...

... Abstract The overburden of shallow tunnels in urban areas is thin and the influence of the tunneling process such as displacements and subsidence due to creation of non-elastic zone in ground surface is very high. To control subsidence, the amount of minimum required support pressure at tunnel...

... of tunnel mapping involves visual inspection and manual mapping of structural information using a geological compass, profilometer and measurement stick. The main advantages of automatic mapping are (1) ability to map inaccessible rock faces (2) no time limitation due to excavation work cycle and (3...

... Abstract Karst is a common geo-morphological feature widespread all over the world and develops in presence of well-defined lithological and environmental conditions. In the last decades, tunnels are becoming longer and longer and with higher overburden (base-tunnels), and usually executed...