Large-Diameter Tunnel Boring Machine

Why Equipment is Crucial for Large-Diameter Tunnel Projects?

Most tunnels with a diameter larger than 4 meters usually suffer the following problems:

Changing geology almost constantly, which makes it advanced and unstable.

Thrust not enough to carry through without breaking down repeatedly.

Cutter and cutterhead wear at a very high rate, resulting in increased maintenance costs.

Project duration is getting unreasonably long, which consequently leads to low ROI.

Zhongda large-diameter TBMs are tailor-made products. First, a thorough on-site investigation and analysis are done for the conditions of the location and only then is a machine customized absolutely to the real situation in order to be able to maintain stable production even if the working conditions change.

Built for Difficult Ground and Long-Term Operation.

Zhongda Tunnel Boring Machines, covering a diameter of 4 to 15 meters and specially designed for urban underground works and infrastructure projects on a large scal,e are what you will find in our company. Our goal is very simple and consistent throughout all the time:

To be able to provide an uninterrupted, stable, and easy-to-control passage of the tunnel through the ground of different types.

The type of project doesn't matter, whether it is a metro tunnel or a high groundwater culvert. Zhongda tunnel drilling machine, on the one hand, always keeps the rhythm of excavation steady; on the other hand, safety as well as downtime minimization are ensured.

Structure Defines Performance: Key Systems That Matter in Large TBMs.

Really, it is not about going for extreme specifications but rather getting the perfect fit.

High-strength main structure. Long-term high-load tunneling is supported by low-alloy steel load-bearing structures of thick-plate design.

Wear-resistant cutting system. Cutter designs optimized for various ground types allow continuous, stable cutting operations in hard rock and mixed strata, hence downtime due to frequent cutter changes is minimized.

High-thrust hydraulic drive systemEnsures the machine advances without interruption,n even if the formation resistance is very high.

Precision control and monitoring. Keeping tunneling benign and controllable is facilitated by real-time monitoring of thrust, pressure, and machine status.

Stable Performance Across Different Ground Conditions:

Soft soil and high-water-content ground.

Pressure stabilization prevents surface settlement.

Hard rock and mixed strata.

The cutting remains consistent, and the advance is seamlessly continued.

Urban underground construction. The low vibration level and controlled excavation are very beneficial when the surrounding structures can be easily disturbed.

Shifting from Traditional Methods to TBM Solution?

Everyone involved with the project is eager for this, and Zhongda is making it happen:

Controlled excavation progress and consequently more reasonable overall schedules.

Less demand for labor and less pressure on on-site management.

Machine operation being stable allows the unexpected shutdowns to be almost eliminated.

Customization Is Not a Matter of Option — It Is a Part of the Project.

Behind every single Zhongda TBM is a project proposal that it supports. We are willing to provide technical support from the very early stage. Here is how:

Tunnel diameter and structural parameter customization.

Cutterhead and thrust configuration geotechnically fitting.

EPB or slurry mode selection.

Transport, assembly, and site installation planning.

Compliance with overseas standards and operating environments.

By combining field experience with digital engineering, each TBM is designed and prepared for construction straight-off without going through the phases of on-site adjustment and readjustment.

Experienced Performance in Different Places.

Australian mining tunnel project. The large-diameter underground boring machine of a customized variety worked in a high-hardness rock environment and helped accomplish a reduction in cutter wear while continuously advancing the work according to schedule.

Southeast Asia metro project. The machine operated with stable performance in soft soil and mixed ground, settlement was controlled, and the construction time was ‍‌‍‍‌shortened.

Engineering-Grade Manufacturing Built for Large-Diameter TBMs.

Zhongda, established in 2004, has a 120,000 m² manufacturing base and an annual production capacity of 50,000 tons. The company primarily focuses on heavy steel structures and large engineering equipment.

Equipped with advanced thick-plate processing, heavy welding, and high-precision CNC, Zhongda produces TBM core structures that can withstand the demanding conditions of high-load and long-term tunneling.

Zhongda is a national high-tech enterprise and partners with leading design institutes. The company is also a long-term supplier to major state-owned infrastructure contractors.

Turning TBM Concepts into On-Site Performance.

If you are in the early stages of a large-diameter tunneling project or have completely planned a tunneling machine, tell us about the tunnel diameter, geological conditions, and construction objectives.

The engineering team at Zhongda will come up with a viable and practical TBM solution grounded in the actual conditions of the site—thus, every meter of excavation will be stable, efficient, and under control.

Get in touch with us today and be brave to take another step in your underground ‍‌‍‍‌project.