Specialist Tunnel Excavation Hobart

Specialist Tunnel Excavation hobart are a leading industry provider of bench and trench major contract surface mining across civil, pipeline and mining projects. We offer a full turnkey solution from design through to delivery of fully supported contracts. Our team has extensive experience with a wide range of surface miners and trenchers.

Safety

Specialist tunnel excavation hobart follows the strictest safety measures in the industry. This includes the use of proper equipment, regular inspections, and training. The company also uses the latest technology to monitor the quality of work. In addition, it provides a safe and clean environment for its employees. The company also employs experienced supervisors to ensure the safety of its workers.

When the FTA-AHP Matrix model is applied, the risk degree of the cuttability reduction, collapse of the tunnel face, and incapability of mucking events was high for all three job sites. However, when the ITA-BN and CN-Matrix models were applied, the risk degree for these events was moderate.

Equipment

Specialist tunnel excavation hobart offers a full range of the latest heavy equipment including roadheaders, hydraulic cutters and earth pressure balance machines. These are deployed on projects ranging from large diameter tunnels to small access tunnels.

For mechanized tunnel excavations in soft soil conditions, two main operation modes are possible: slurry mode (SM) and earth pressure balanced mode (EPBM). For SM, the tunnel face is supported by a bentonite slurry, while for EPBM, the excavated material is used to transfer stabilizing pressure to the shield.

The natural characteristics of the excavated soil have a direct impact on machine behaviour and, in particular, on its ability to resist clogging and to maintain fluidity. However, the currently available laboratory routines for characterizing clogging potential and fluidity focus exclusively on sedimentary pure clayey soils and do not consider mixed soils. This new combined laboratory routine enables the evaluation of any cohesive soil in its natural and conditioned state, making it feasible for both laboratory and jobsite testing prior to and during tunnel excavation.



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