Clogging occurs during mechanical tunneling with a Tunnel Boring Machine (TBM) because of adhesion of clayey soils to the cutterhead and conveyor system. The present study examined the effects of water and sand contents on clogging in Montmorillonite clayeysoil. Testing was carried out using an adhesion test device on 28 samples with different water and sand contents to determine adhesionstress...

An automated modelling and control design environment for serial manipulators has been implemented in Matlab/Simulink. This development was motivated by the need for a fast and insightful modelling tool, given that currently available modelling environments are not well suited for control design. The manipulator configuration is defined within a graphical user interface and the corresponding ma...

The brittleness of rock is known to be an important property that affects the fragmentation characteristics in mechanized cutting. As interaction between cutting tool and (i.e., cutter forces, efficiency, s/p ratio, abrasivity) during mechanical strongly influenced by fragmentation, tools disc pick cutter) experience different behaviors depending on brittleness. In this study, relationships abr...

Utility construction projects have great opportunities for simulation applications in construction. This paper describes the special purpose tunneling simulation template developed based on the tunneling operations performed at the City of Edmonton Public Works Department for shielded tunnel boring machines. The tunneling operations are described, then the tunnel template and its components are...

Qomroud water conveyance tunnel (lot 1&2) with the length of 16 kilometers is considered as one of the greatest development and national projects in Iran. Since about 2 kilometers of tunnel pass through alluvium and the rest of the tunnel pass through various types of geological units, and due to the complexity of geological condition and variety of effective criteria, suitable selection of exc...

Abstract With the knowledge of geology in front a tunnel, excavation process can be optimized to avoid damage at tunnel boring machine and settlements on surface. Therefore, dwell times decreased additional expenses avoided. Transmitted seismic waves will spread, reflected refracted due geological changes. By utilizing geophones, captured information about structure extracted from measured seis...