Tunneling and Microtunneling Applications
TBM Rubber Seals and Tunneling Applications
Rubber sealing products help protect tunnel boring machinery, control water and slurry ingress, and seal critical interfaces during launch, excavation, and tunnel lining installation.
Application Overview
Sealing for Demanding Underground Conditions
TBM sealing systems operate around large diameters and are exposed to water, slurry, grout, abrasive particles, pressure changes, and continuous machine movement.
The seal profile, dimensions, material, and installation arrangement should be selected according to the TBM model, interface geometry, operating medium, and project conditions.
Primary Uses
TBM Rubber Seal Applications
Main Bearing Protection
Radial and lip seal arrangements help protect the main bearing area behind the cutterhead from water, pressurized slurry, abrasive dust, and grit.
Launch and Reception Sealing
Large seals close the gap between the TBM shield and the shaft opening during machine launch or reception, helping control water, grout, and face pressure.
Hydraulic Cylinder Sealing
Rod, piston, and related hydraulic seals support thrust, steering, and tool-control systems by limiting fluid leakage at moving interfaces.
Segment Joint and Tail-Area Sealing
Sealing profiles used around tunnel segments and machine interfaces help limit water or grout ingress while accommodating installation compression and movement.
Microtunneling Applications
Compact tunneling and pipe-jacking equipment uses purpose-matched seals for smaller-diameter crossings beneath roads, railways, utilities, and waterways.
Profiles and Gaskets
TBM Segment and Strip Seal Applications
- Precast tunnel segment joints: Rubber gaskets fit into prepared grooves to seal the interfaces between adjoining tunnel lining segments.
- Water-ingress control: Compressed profiles form a barrier at segment joints where groundwater resistance is required.
- Installation compression: Profile geometry is selected to compress at the joint while accommodating manufacturing and assembly tolerances.
- Custom extruded profiles: Strip seals can be supplied in different cross-sections and lengths according to drawings, samples, and installation requirements.
Engineering Review
Information Required for Seal Selection
- TBM type, model, and application position
- Seal drawing, cross-section, or clear sample photos
- Required dimensions and installation groove details
- Operating medium, pressure, and working environment
- Preferred rubber material or performance requirements
- Required quantity and project delivery destination
Discuss Your TBM Sealing Requirement
Send the product drawing, dimensions, quantity, and operating conditions so our sales and technical team can review the application.
