Applications of steel supports in subway construction

Subway Station Foundation Pit Support

Applicable Conditions: Deep foundation pits for subway stations constructed using the open-cut method (common depth 10-30m), complex foundation pits for transfer stations

Function: Resists lateral earth pressure and water pressure on the foundation pit walls, prevents pit wall collapse and deformation, and protects surrounding pipelines (gas, electricity, water supply and drainage) and buildings.

Typical Cases: Subway stations in urban core areas (such as CBD, old city districts), where strict control of foundation pit deformation is required.

Subway Tunnel Construction

Applicable Construction Methods: Shallow buried tunneling method (CRD method, CD method), reinforcement of shield starting/receiving sections

Function: Provides temporary support for the tunnel excavation face and initial support structure, controls surrounding rock convergence deformation, and ensures construction safety.

Special Scenarios: Soft soil, water-rich strata, tunnel sections crossing existing roads/bridges

Ancillary Structure Construction

Application Areas: Foundation pit or tunnel excavation for subway entrances, ventilation shafts, and connecting passages

Features: Provides a flexible support system for small-section, irregular foundation pits, adapting to complex construction spaces.

Excellent Mechanical Performance

High Strength: Made of Q235B/Q345B steel, with high compressive strength, capable of withstanding large tonnage earth pressure.

High Stiffness: Large section moment of inertia, small deformation, effectively controlling foundation pit displacement (usually required to be ≤30mm).

Flexible and Efficient Construction

Convenient Installation: Can be assembled on-site and quickly hoisted, requiring no curing period, shortening the construction cycle.

Adjustability: Equipped with adjustable joints (expansion joints) for easy adjustment of support length and pre-tensioning force.

Recyclable and Reusable: After removal and inspection, it can be reused in similar projects, reducing costs.

Adaptable to Complex Conditions

Customizable: Steel supports of different specifications (diameter 609mm/800mm, etc.) and lengths can be customized according to foundation pit size and stress conditions.

Strong Compatibility: Can be used in combination with reinforced concrete supports, steel sheet piles, continuous walls, and other support structures.