Tunnel Boring Equipment
Maximum Thrust for Tunnel Giants
The Tunnel Boring Equipment industry plays a vital role in the development and construction of infrastructure projects worldwide. Particularly in tunnel construction, robust and reliable machinery is essential for handling demanding operations under diverse geological conditions. Toleng Hydraulics provides customized hydraulic solutions to meet the industry’s high standards.
In tunnel construction, mechanical tunneling systems achieve peak performance and safety through process automation. Toleng Hydraulics supplies hydraulic cylinders and rotary joints for these tunneling behemoths, currently capable of excavating tunnels up to 19 meters in diameter to cope with the extreme conditions encountered during tunnel construction.
Toleng Hydraulics also develops and manufactures hydraulic cylinders and hydraulic units for mini excavators and various Tunnel Boring Equipment, further enhancing its business portfolio in this industry.
Application Example: In a tunneling project at a coal mine with a capacity of tens of millions of tons, a roadheader-anchor machine was advancing 30 meters per day through a sandy mudstone roof, requiring immediate anchor bolt support after every meter of excavation. Two sets of anchor bolt drilling rigs were deployed on each side of the equipment. Each set consisted of three hydraulic cylinders working in tandem: the tilting cylinder drove the drilling rig to rotate and position itself, the compensation cylinder ensured it was flush against the rock wall, and the pushing cylinder pressed a 2.2-meter anchor bolt into the rock strata with a thrust of 25 kN. Over three months of construction, more than 25,000 holes were drilled, with an average drilling time of less than 3 minutes per hole. The cylinder sealing system performed excellently in dusty environments, requiring only weekly lubrication, significantly improving support efficiency.
- Contactless, integrated, and redundant measurement systems for various lengths and pressure ranges
- Rotary unions, erector cylinders, torque support cylinders, differential cylinders, crusher cylinders, and thrust cylinders
- Painting according to customer specifications
- Hydraulic cylinders for gripper boring machines, including drive cylinders, gripper cylinders, movement cylinders, and pull cylinders for towing the trailer
- Hydraulic end position damping and proximity control
- Telescopic Tubes
References + Applications
Customized hydraulic cylinders for railway hard rock tunnel boring machines
Tunnel boring machines (TBMs) had to overcome some of the most challenging geological conditions on Earth: high rock stress, thick granite strata, and complex fault zones. During the construction of a 20.8-kilometer-long twin-bore tunnel, four 10.2-meter-diameter grab TBMs were deployed. These machines excavated millions of tons of earth from deep within the plateau. Toleng Hydraulics provided a variety of custom-designed cylinders for these TBMs, including thrust cylinders, grab cylinders, and auxiliary cylinders.
Thrust Cylinder:
Piston Diameter: 360 mm
Piston Rod Diameter: 280 mm
Stroke: 2100 mm
Working Pressure: 30 MPa
Function: Pushes the cutterhead forward to cut into hard granite working surfaces.
Gripper Cylinder:
Piston Diameter: 750 mm
Piston Rod Diameter: 600 mm
Stroke: 950 mm
Working Pressure: 35 MPa
Function: Presses the gripper firmly against the tunnel wall to absorb the enormous torque generated by the rotating cutterhead; total gripping force exceeds 18,000 kN.
Rear Support Thrust Cylinder:
Piston Diameter: 320 mm
Stroke: 1,600 mm
Function: Supports the machine during gripper repositioning.
Trailer Towing Cylinder:
Piston Diameter: 280 mm
Stroke: 3,500 mm
Function: Tows the backup gantry crane at the rear through sharp bends.
Technical Highlights:
750 mm The gripper cylinders are among the largest manufactured in China for hard rock tunnel boring machine (TBM) applications. Operating at 35 MPa, they generate a total gripping force exceeding 18,000 kN, firmly anchoring this 3,000-ton machine to the rock face during high-torque excavation.
All cylinders feature heavy-duty sealing systems designed to withstand extreme abrasion from rock dust and maintain stable performance at altitudes above 3,500 meters.
Integrated magnetostrictive displacement sensors provide real-time position feedback with ±0.5 mm accuracy, enabling precise automated control.
Heavy-duty hydraulic cylinders for open-pit mining operations in China
This heavy-duty hydraulic excavator belongs to the mining excavator category.
Toleng supplies the hydraulic components and cylinders for this machine, enabling a maximum single-shovel load capacity of 45 tons. The hydraulic cylinders ensure excellent maneuverability and powerful digging force, thereby improving productivity and reducing operating costs.
Technical Specifications:
Maximum Digging Radius: 12.8 meters
Bucket Capacity: 25 cubic meters
Operating Weight: 380 tons
Hydraulic Cylinders are manufactured by Toleng Hydraulics.
Cylinder Type | Piston Diameter | Stroke | Working Pressure
Boom Cylinder | 320 mm | 2,450 mm | 350 bar
Stick Cylinder | 280 mm | 2,200 mm | 350 bar
Bucket Cylinder | 260 mm | 1,850 mm | 370 bar
Track Tensioner Cylinder | 120 mm | 450 mm | 250 bar
Some of our applications
- Tunnel Boring Machinery
- Rock Drilling Rig
- Roadheader
- Wet Spraying Machine