Subway tunnel lining trolleys are essential non-standard equipment used in the secondary lining process of tunnel construction, especially for urban metro systems. Unlike the generic “tunnel lining trolley” which encompasses various applications (highway, railway, hydropower, etc.), subway tunnel lining trolleys are specifically designed to meet the unique requirements of metro tunnel sections and stations.
Subway tunnel lining trolley models
While there isn’t a universally standardized set of “models” like you’d find for a mass-produced consumer product, these trolleys are typically categorized and described based on several key characteristics and design principles:
I. Classification by Tunnel Section/Application:
Section Trolley : This is the most common type, designed for the long, continuous tunnel sections between subway stations. Their design focuses on efficient, repeatable lining for a consistent circular or horseshoe-shaped cross-section.
Station Trolley: These are specialized for the larger, often more complex and varied cross-sections of subway station caverns. They might be designed to handle rectangular, multi-arch, or other irregular shapes.
Button-Arch Trolley: Used for specific sections like the “button-arch” (inverted arch or invert) at the bottom of the tunnel, especially for the secondary lining of the invert.
Middle Partition Trolley : For tunnels with a central partition wall, these trolleys are designed to facilitate lining in these specific configurations.
II. Classification by Driving/Operation Mechanism:
Hydraulic Automatic Walking Lining Trolley: This is the most prevalent and advanced type. They utilize hydraulic systems for movement, formwork adjustment (expanding, retracting, lifting, lowering), and often for precise positioning. They are self-propelled, driven by electric motors.
Mechanical Lining Trolley: While less common now for large-scale projects, older or simpler designs might use mechanical systems for movement and formwork manipulation.
Hydraulic Drag Type: These trolleys are dragged by external equipment, but still use hydraulics for formwork operations.
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