What is the excavator doing in the tunnel?

Excavators are mainly responsible for shoveling earthwork in tunnels, repairing sidewalks, opening doors and brushing slopes. When choosing an excavator for tunnel engineering, the first consideration is flexibility, not too big, so generally, 20-24 ton excavators will be selected.

Secondly, the strength should be strong enough, and many diggers recommend excavators with low maintenance cost and at least reduce the lost time. Second-hand excavators are especially recommended, because tunnel engineering is more harmful to the machine, especially its work content is unsafe.

Extended data:

Due to the narrow space, large interference and complex environment in the tunnel, the working conditions in the tunnel are complicated. For example, first, the space in the tunnel is narrow, which is not conducive to engine circulation and easy for trucks; Second, the humidity in the tunnel is very high, and the requirements for the air intake system are strict.

Thirdly, there are many big stones in the tunnel, which hurts the track when the excavator walks; Fourthly, gravel falls from the upper part of the hole, and the cab and oil cylinder need protective covers; Fifth, maintenance parts such as air filter and wearing parts such as bucket teeth need to be replaced frequently, and the cost is high.

Due to the harsh working conditions in tunnel construction, safety accidents are prone to occur. Therefore, it is necessary to do a good job of exploration in advance, and reasonably choose the location of the hole, the branch hole, the transportation route and the tunnel excavation method. Tunnel excavation mainly includes excavation, slag discharge, safety support and auxiliary operations such as wind, water and electricity supply, ventilation and drainage.

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