1. Overview
Songmao provides tunnel and mining formwork solutions for underground concrete structures, including tunnel walls, lining sections, shafts, portals, and underground chambers. Our systems are configured according to excavation geometry, concrete pouring requirements, available working space, and temporary support conditions.
Combining Steel Frame Formwork, H20 Timber Beam Formwork, Single-Side Wall Formwork, and Shoring Systems, we offer flexible configurations for different underground construction applications.
From structural drawing review and formwork layout design to customized manufacturing and technical support, Songmao helps contractors select practical formwork solutions for complex tunnel and underground infrastructure projects.
2. Applications & Recommended Systems
| Application | Recommended System | Key Considerations |
| Tunnel Side Walls | Steel Frame Wall Formwork / H20 Wall Formwork | Wall dimensions, concrete pressure and access |
| Tunnel Lining Sections | Customized Steel Formwork | Tunnel cross-section, curvature and pouring sequence |
| Tunnel Portals | Steel Frame / H20 Timber Beam Formwork | Structural geometry and wall height |
| Underground Shafts | Steel Frame Wall Formwork / Customized Formwork | Shaft dimensions, access and lifting arrangements |
| Underground Chambers | Wall & Slab Formwork + Shoring System | Structural layout, floor height and temporary loads |
| Mining Infrastructure | Steel Frame / Single-Side Wall Formwork | Equipment foundations, retaining walls and underground concrete structures |
| Excavation & Utility Trenches | Trench Box System | Excavation depth, ground conditions and trench protection requirements |
| Parameter | Specification / Selection Basis |
| Formwork Application | Tunnels, Shafts, Underground Walls and Chambers |
| Formwork Materials | Steel Frame / Steel Frame Plywood / H20 Timber Beam |
| Tunnel Cross-Section | Project-Specific |
| Wall & Lining Thickness | According to Structural Drawings |
| Formwork Panel Dimensions | Standard or Customized |
| Curved Formwork Radius | Subject to Project Geometry and System Design |
| Concrete Pressure | According to Selected Formwork and Pouring Conditions |
| Pouring Height & Length | Based on Construction Sequence |
| Formwork Support | Steel Props / Shoring Towers / Engineered Brackets |
| Single-Side Formwork | Available Where Through-Ties Cannot Be Used |
| Access & Clearance | Based on Underground Working Conditions |
| Surface Finish | According to Form-Facing Material |
| Customization | Panel Layout, Connections and Supporting Structure |
4. Key Features & Benefits
①Adaptable to Complex Underground Structures
Formwork panels and supporting components can be configured for different wall dimensions, tunnel profiles, shafts, and underground structural layouts.
②Stable Concrete Forming Support
Steel frame formwork, tie systems, and engineered supporting structures provide rigid formwork configurations for underground concrete pouring.
③Flexible System Combinations
Wall formwork, single-side formwork, slab formwork, and shoring systems can be combined according to structural requirements and construction methods.
④Modular & Reusable Components
Modular panels and compatible accessories simplify assembly, dismantling, and repeated use across successive concrete construction sections.
⑤Project-Based Formwork Engineering
Songmao provides formwork layout drawings, quantity calculations, customized configurations, and technical recommendations based on underground structural drawings.
5. Engineering Challenges We Address
Complex Tunnel Geometry
Tunnel portals, underground chambers, and shaft structures may involve irregular wall dimensions, curved surfaces, and changing cross-sections. Songmao provides customized formwork layouts and supporting arrangements based on structural drawings.
Restricted Underground Working Space
Limited access and confined construction areas can make formwork handling and installation more challenging. Modular panels and project-specific component configurations help contractors plan practical assembly and dismantling procedures.
Single-Side Concrete Construction
In underground walls and retaining structures where opposing formwork panels or through-tie rods cannot be installed, single-side formwork systems provide an alternative support arrangement using engineered brackets and anchoring components.
Temporary Support & Construction Loads
Underground slabs, beams, and chambers require suitable temporary support during concrete construction. Songmao can combine beam and slab formwork with adjustable props or shoring towers according to project loads and available space.
6. One-Stop Engineering Support
From Underground Structural Drawings to Formwork Solutions
Songmao supports contractors with formwork selection, panel layout planning, quantity calculations, and customized manufacturing for tunnel and underground concrete structures.
Our engineering team reviews structural dimensions, concrete pouring requirements, construction access, and temporary support conditions to recommend suitable formwork and shoring configurations.
We also coordinate compatible accessories, export packaging, and technical documentation to support project procurement and construction planning.
