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- Todosija Paunov 34, Kochani, Macedonia
Steel Hydraulic Tunnel Lining Trolley Formwork System
* It is widely be used in all kinds of tunnel concrete construction
* The product is easy to use and flexible to disassemble.
* More times turnover, low cost amortization.
* The appearance of concrete is well quality.
* Save labor cost and reduce project cost.
● light weight;
● simple, strong and stable structure;
● moved, mounted and stripped easily;
● strong reusability;
● small deformation under force;
● adequate space under traveler and providing a big space for bars and formwork construction operation.
Steel Arches for Tunnels
Capacity for Producing Tunnel Supports
ATOM STEEL LTD can efficiently and quickly provide hundreds of tunnel supports from the smallest beams or other structural steel sections up to the largest. Unlike beams formed by presses, the beams rolled by ATOM STEEL LTD have minimal or no deformation in the flanges or web.
Tunnel Supports: Value-Added Services
In addition to the rolled steel sections, the company can weld on mounting plates with bolt holes for ease of installation in the field. ATOM STEEL LTD can also punch holes in the flanges or webs of the beams. Nuts and bolts can be provided and sent to the job site with the tunnel supports in kits.
3 & 4 Rebar Lattice Girders
3 Rebar Lattice girders in conjunction with shotcrete achieve an excellent level of support in tunneling. They consist of steel bars welded together in triangular pattern and they are made to suit the shape of the tunnel. This combined system acts as an armor that provides balanced support and reduced consumption of shotcrete.
ATOM STEEL LTD lattice girder system is totally surrounded by concrete. There are no unconsolidated areas, voids or fissures visible. It represents a complete homogenous composite structure, reduces ground settlement and prevents the ingress of water.
Advantages
- Used in conjunction with shotcrete, lattice girders allow rapid tunnel advancement.
- Lattice girders provide immediate and safe roof support over the excavated area
- Dimensions and characteristics of lattice girders are made according to customer specifications.
- Reduces weight by lowering quantity of steel, while providing greater compressive strength
- Lattice girders can be stacked for shipping in containers
- Low weight facilitates installation process
- Reduces and eliminates empty areas upon shotcrete application
ATOM STEEL LTD lattice girder system has been tested and successfully installed in many tunnel projects
It is made from reinforcement steel of B500B quality, with three or four bearing longitudinal bars which are connected by diagonals with appropriate welding. One tunnel arch is comprised of usually five segments and is connected by screws and pipes.
ATOM STEEL LTD produces all kinds of lattice girder tunnel lining in accordance with given specifications and customer designs.
Metal support arches are used in a wide range of applications and with many different soil conditions, offering the advantage of being resistance to compression and traction efforts with a high bending moment. This support technique is suitable for soil conditions that are very prone to subsidence due to the efforts caused by converging soils.
Cold curved beams are used to adapt to the excavation diameter, using the radii required to install them in parallel to the soil. Our entire manufacturing process, from design, bending, welding and dispatch, is certified by:
EN-1090 (CE marking) yand governed according to the ISO9001 quality system.
High-resistance beams that maintain the cross-section dimensions with a low deformation or in which the decompressed soil thickness around the tunnel must be limited within strict parameters. The sectors are joined to form the entire arch using bolted joints between the plates.
HEB Support arches
Metal support arches are used in a wide range of applications and with many different soil conditions, offering the advantage of being resistance to compression and traction efforts with a high bending moment. This support technique is suitable for soil conditions that are very prone to subsidence due to the efforts caused by converging soils.
Cold curved beams are used to adapt to the excavation diameter, using the radii required to install them in parallel to the soil. Our entire manufacturing process, from design, bending, welding and dispatch, is certified by:
EN-1090 (CE marking) yand governed according to the ISO9001 quality system.
Rigid “HEB” support arches
High-resistance beams that maintain the cross-section dimensions with a low deformation or in which the decompressed soil thickness around the tunnel must be limited within strict parameters. The sectors are joined to form the entire arch using bolted joints between the plates.
