Tunnel Boring Machines for tunnel excavation
Tunneling with tunnel boring machine
The tunnelling with tunnel boring machine is an advanced technique that guarantees efficiency and safety in subway projects. Using specialized equipment, such as our tunnel boring machines, we are able to carry out the tunnel excavation accurately, minimizing the impact on the environment and ensuring that project deadlines are met. TBMs are designed to adapt to different types of terrain, making them a versatile solution for a wide range of applications, from subways to sewer tunnels.
How excavation with a tunnel boring machine is performed
In a subway project, the tunnel boring machine in subway projects plays a crucial role in facilitating the continuous and structured excavation of the tunnel. The TBM advances as it excavates, while the excavated material is efficiently transported to the surface. This process ensures that the tunnel is constructed according to project specifications, maintaining the integrity of the subway environment and allowing effective integration with other infrastructure.
Choice of Tunnel Boring Machine
Having a good geological study is essential for the proper execution of a project. Based on the geology, the most appropriate drilling system will be chosen (with EPB TBM, Hydroshield, hard rock shield or open shield).
Likewise, the geology defines the type of cutting wheel to be installed in the TBM, the percentage of opening, the type of cutting tools, cutting discs, scrappers, as well as the durability of the tool to define the places to change them.
Thanks to the different drilling equipment we have at our disposal as well as the experience we have accumulated, we can offer you a wide variety of options.
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Frequently asked questions about tunnel boring machines for tunnel excavation
What kind of tunnels can be built with a tunnel boring machine?
The tunnel boring machines are versatile and can be used to construct a variety of tunnels, including subway tunnels, road tunnels, tunnels for utilities such as water and sewer, and mining tunnels. The specific type of tunnel boring machine is selected based on the type of terrain and project requirements.
How does the type of terrain affect the choice of TBM?
The type of terrain influences the choice of TBM, as different TBMs are designed for specific conditions. For example, closed shield TBMs are suitable for unstable ground, while EPB TBMs are ideal for soft ground. The right choice ensures efficient and safe excavation.
How is the feed rate of a tunnel boring machine controlled during excavation?
The excavated material by a tunnel boring machine is handled by a specialized system that includes conveyor belts or wagons. Once the TBM breaks through the ground, the spoil is collected and transported through these systems to the surface. There, the material can be processed or managed according to the needs of the project, ensuring a continuous and efficient flow during excavation.
What measures are taken to ensure accuracy in tunnel construction?
To ensure the tunnel construction accuracyadvanced control and monitoring systems, such as lasers and leveling sensors, are used. These systems allow the alignment and profile of the tunnel to be adjusted and monitored during excavation, ensuring that it meets project specifications.
What is the typical duration of a TBM excavation project?
The duration of an excavation project The length of tunneling with a tunnel boring machine varies depending on the size of the tunnel, the type of terrain and the speed at which the tunnel boring machine advances. Small projects can take a few months, while larger, more complex projects can extend over years. The specific time is determined by the project conditions.
How is the maintenance of a tunnel boring machine performed during a project?
The maintenance of a tunnel boring machine during a project includes regular checks of the mechanical and cutting systems, as well as inspection of the muck conveyor systems. Technicians perform preventive and corrective maintenance to ensure that the TBM is working properly and to minimize the risk of failure during excavation.
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