There are various ways of building a tunnel, and for excavation jobs many contractors prefer to use versions of standard machines that have instead been converted to suit the confines of tunnelling applications. Some contractors opt to adapt their own units and with ventilation being an issue in underground work, engine emissions are a key focus when adapting machines. Exhaust filters and other after treatment solutions are usually required and there are an array of off-the-shelf packages available as well
Dynapac is now offering a high compaction screed system that can help end-users to achieve better pre-compaction rates across a project. At the same time the system is also said to avoid the risk of crushing aggregate or displacing bitumen, for all layers and throughout the whole layer thickness
The HD+ 120i V-VIO 12 t tandem roller has the latest Hamm cab, offering good all round visibility as well as various interfaces to connect telematics systems.
