Tunnel lining trolley

The fully automatic hydraulic needle beam trolley is used for full-section concrete lining in circular, horseshoe-shaped and other hydraulic tunnels. A longitudinal needle beam provides the load-bearing and guiding core, surrounded by segmented forms. A central hydraulic system operates form setting, stripping and movement within the casting cycle. Xinhang coordinates the trolley configuration around lining geometry, tunnel diameter changes and casting length, checking needle beam span, panel divisions and hydraulic expansion and retraction together.

Needle beam core with alternating support: The needle beam supports the forms and serves as the travel track. The forms and beam are anchored alternately and move relative to each other for self-propelled stepping, reducing manual handling and repeated track assembly between cycles. Central control of hydraulic setting and stripping: Grouped cylinders expand and retract the crown, side and invert forms. Screw jacks lock the positioned forms and share the load. Setting and stripping are controlled from a central console to support consistent lining geometry and thickness. Full-section casting with a coordinated cycle: The invert, sidewalls and crown are formed in one casting operation. Stripping follows the crown, sides and finally invert sequence, coordinated with working windows, vibration and crown grouting.

Provide lining sections, tunnel diameters and transitions, casting length, gradients, curves, and placement and vibration methods. Confirm needle beam length, cylinder groups, uplift restraint and guidance and positioning arrangements in the project scheme.