What is the use of a tunnel jumbo?
2 Answers
Tunnel jumbo refers to the jumbo used for tunnel excavation. Vehicle dimensions: The overall dimensions of the tunnel jumbo are 8740×1550×2260, with a drilling depth of 2120~3100 and a drilling diameter of Φ33~Φ45. Vehicle function: The tunnel formwork jumbo is specialized equipment essential for secondary lining during tunnel construction. It is generally designed as a steel arch frame type, using standard combined steel formwork. It may not have automatic walking capability, relying on external power for movement. The formwork removal and erection are entirely manual operations with high labor intensity. Therefore, it is now commonly used in tunnel construction, especially for concrete lining projects with complex planar and spatial geometries, frequent process transitions, and strict technical requirements, where its advantages are more pronounced.
The tunnel jumbo is incredibly useful on our construction site, especially when digging new tunnels. It's like a giant mobile platform loaded with drills and various tools. I climb up to operate it daily, mainly used for drilling holes in rocks to place explosives, breaking through hard rock layers, and installing support frames to stabilize tunnel walls and prevent collapses. When encountering tunnel leaks or structural instability, we drive it in to inspect cracks or reinforce steel bars, making operations much safer. It also doubles as a small truck for transporting construction materials like cement and steel bars. I remember one time during heavy rain when the roof became loose, and it was this machine's timely intervention that prevented an accident. The longer the tunnel, the more critical this jumbo becomes, saving us considerable effort and time.
