Sofrasar Tunnel Solutions<\/h1>\n\tSupporting tunnel infrastructure teams with industry knowledge, design and engineering services, technical expertise and fastening solutions for over 25 years.\n<\/div>\nGET A TECHNICAL CONSULT<\/a>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>![\"Blue](\"https:\/\/optimas.com\/wp-content\/uploads\/2019\/11\/ico1.jpg\")
<\/span><\/div>ENGINEERING DESIGN SUPPORT<\/h3>\n
Make the best tunnel fastener decisions with expert <\/span>design and engineering service<\/span> assistance, finite elements analysis and project-specific technical support. <\/span><\/p>\n<\/div><\/div><\/div><\/div>![\"Blue](\"https:\/\/optimas.com\/wp-content\/uploads\/2019\/11\/ico2.jpg\")
<\/span><\/div>RESPONSIVE AND EFFICIENT SHIPPING<\/h3>\n
Get the right solutions delivered at the right time to meet the specialized needs of your tunnel construction project\u2014anywhere across the globe<\/p>\n<\/div>
<\/div><\/div><\/div>![\"Blue](\"https:\/\/optimas.com\/wp-content\/uploads\/2019\/11\/ico3.jpg\")
<\/span><\/div>QUALITY
\nCONTROL<\/h3>\n
Know you have the highest quality parts as a result of our rigorous standards, zero defect culture, leading certifications and registrations.<\/p>\n<\/div>
<\/div><\/div><\/div>![\"Orange](\"https:\/\/optimas.com\/wp-content\/uploads\/2019\/11\/ico4.jpg\")
<\/span><\/div>VALIDATION AND TESTING<\/h3>\n
Confirm the mechanical resistance of each system before you implement it with our full range of testing tools available at our laboratories<\/p>\n<\/div>
<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>![\"An](\"https:\/\/optimas.com\/wp-content\/uploads\/2019\/11\/sofrasar.jpg\")
<\/span><\/div><\/div><\/div><\/div>BOLTING SYSTEMS<\/h2>\n
Bolting systems are used for the assembly of concrete segments, rail fixings and belt conveyors. Our range of structural bolt systems can support tensile stress from 70 to 400 kN. Metallic inserts are made out of stainless steel, either 316L or a different grade as chosen through our design and engineering services. We offer various steel grade bolt options including ASTM A325 and 10.9, as well as zinc coated, hot dip galvanized or plastic coated.<\/p>\n<\/div>
<\/div><\/div><\/div>DOWEL SYSTEMS<\/h2>\n
Fixating the rings through thermoplastic dowels can enable a quick and secure installation in tight global tolerances while providing stability of the rings as a result of ground or grout injection pressure.<\/p>\n<\/div>
<\/div><\/div><\/div>CENTERING SYSTEMS AND SHEAR DOWELS<\/h2>\n
Centering systems and shear dowels that speed and simplify installation of concrete segments and enable optimum control of the shearing stress up to 500 kN. We offer a large range of dimensions and thermoplastic qualities to find the most appropriate deflection curves for your application.<\/p>\n<\/div>
<\/div><\/div><\/div>GROUT-LIFT SOCKETS<\/h2>\n
A large range of grout and lift-sockets provide a tightness cap up to 40 bars and a breaking tensile stress up to 600 kN.<\/p>\n<\/div>
<\/div><\/div><\/div>GUIDING RODS AND PACKERS<\/h2>\n
These simple and cost-effective products control the position between the concrete segments, providing a good shear resistance and full control of tight tolerances and slip hazards.<\/p>\n<\/div>
<\/div><\/div><\/div>PRECAST ACCESSORIES AND SECURITY SYSTEMS<\/h2>\n
Our wide range of systems include:<\/p>\n
\n- Plastic and metallic inserts for the installation of electrical equipment<\/li>\n
- Fire protection products<\/li>\n
- RFID-based product traceability<\/li>\n
- Geothermal energy in tunneling<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div>
FINITE ELEMENTS ANALYSIS<\/h2>\n
With a large range of grout and lift-sockets, we can assist your design stage by undertaking finite elements analysis at our laboratories using specialized testing and software.<\/p>\n<\/div>
<\/div><\/div><\/div>RELATED LINKS<\/h2>\n<\/div>Explore our Tunnel Solutions<\/h4>\n
> DOWNLOAD BROCHURE<\/a><\/p>\n<\/div><\/div><\/div><\/div>How to Find the Optimal Fixing Design to Meet All Tunnel Project Requirements<\/h4>\n
> READ ARTICLE<\/a><\/p>\n<\/div><\/div><\/div><\/div>Tunneling Project Benefits from Innovative Fasteners<\/h4>\n
> READ CASE STUDY<\/a><\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>In the beginning we were quite skeptical about working with dowels in circumferential joints. However, after the success in the Crossrail project, plastic dowels have become an alternative to the classic bolt system for our contractors.<\/h2>\n<\/div>\u2013 Customer Tunnel Lead<\/p>\n<\/div>
<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>The Components of Unrivaled Success<\/h2>\n
To better serve you, we have tunnel solutions experts in Italy, Spain, Japan, Russia, Hong-Kong, India, Singapore, Oceania, South\/Latin America and North America.<\/p>\n<\/div>
<\/div><\/div><\/div>Sofrasar Tunnel Products<\/h2>\nFRANCE<\/h2>\n
4 rue Robert Pax
\n57910 HAMBACH – France<\/p>\n
T<\/span> +33 (0) 3 87 98 90 35<\/a><\/p>\nCONTACT US<\/a><\/p>\n<\/div><\/div><\/div><\/div><\/div>Optimas Tunnel Division<\/h2>\nRepresentatives<\/h2>\n<\/div><\/div><\/div><\/div>HONG KONG<\/h2>\n
Merman Technology Company Ltd<\/p>\n
T<\/span> +852 (0) 2581 2660<\/a><\/p>\n<\/i><\/a><\/p><\/center><\/div><\/div><\/div>INDIA<\/h2>\n
Modern International<\/p>\n
T<\/span> +91 (0) 11470 86481<\/a><\/p>\n<\/i><\/a><\/p><\/div><\/div><\/div>ITALY<\/h2>\n
SMAAC<\/p>\n
T<\/span> +39 (0) 02 76110330<\/a><\/p>\n<\/i><\/a><\/p><\/div><\/div><\/div>JAPAN<\/h2>\n
AJUMO<\/p>\n
T<\/span> +49 (0) 40 600 195 0<\/a><\/p>\n<\/i><\/a><\/p><\/div><\/div><\/div>CHINA<\/h2>\n
Christophe Zhang<\/p>\n
T<\/span> +33 (0) 6 86 54 79 53<\/a><\/p>\n<\/i><\/a><\/p><\/div><\/div><\/div>TURKEY<\/h2>\n
Ertunnel<\/p>\n
T<\/span> +90 (0) 312 219 40 47<\/a><\/p>\n<\/i><\/a><\/p><\/div><\/div><\/div>SPAIN, PORTUGAL<\/h2>\n
ABYO TM<\/p>\n
<\/span><\/div>ENGINEERING DESIGN SUPPORT<\/h3>\n
Make the best tunnel fastener decisions with expert <\/span>design and engineering service<\/span> assistance, finite elements analysis and project-specific technical support. <\/span><\/p>\n<\/div> Get the right solutions delivered at the right time to meet the specialized needs of your tunnel construction project\u2014anywhere across the globe<\/p>\n<\/div> Know you have the highest quality parts as a result of our rigorous standards, zero defect culture, leading certifications and registrations.<\/p>\n<\/div> Confirm the mechanical resistance of each system before you implement it with our full range of testing tools available at our laboratories<\/p>\n<\/div> Bolting systems are used for the assembly of concrete segments, rail fixings and belt conveyors. Our range of structural bolt systems can support tensile stress from 70 to 400 kN. Metallic inserts are made out of stainless steel, either 316L or a different grade as chosen through our design and engineering services. We offer various steel grade bolt options including ASTM A325 and 10.9, as well as zinc coated, hot dip galvanized or plastic coated.<\/p>\n<\/div> Fixating the rings through thermoplastic dowels can enable a quick and secure installation in tight global tolerances while providing stability of the rings as a result of ground or grout injection pressure.<\/p>\n<\/div> Centering systems and shear dowels that speed and simplify installation of concrete segments and enable optimum control of the shearing stress up to 500 kN. We offer a large range of dimensions and thermoplastic qualities to find the most appropriate deflection curves for your application.<\/p>\n<\/div> A large range of grout and lift-sockets provide a tightness cap up to 40 bars and a breaking tensile stress up to 600 kN.<\/p>\n<\/div> These simple and cost-effective products control the position between the concrete segments, providing a good shear resistance and full control of tight tolerances and slip hazards.<\/p>\n<\/div> Our wide range of systems include:<\/p>\n With a large range of grout and lift-sockets, we can assist your design stage by undertaking finite elements analysis at our laboratories using specialized testing and software.<\/p>\n<\/div> > DOWNLOAD BROCHURE<\/a><\/p>\n<\/div> > READ ARTICLE<\/a><\/p>\n<\/div> > READ CASE STUDY<\/a><\/p>\n<\/div> \u2013 Customer Tunnel Lead<\/p>\n<\/div> To better serve you, we have tunnel solutions experts in Italy, Spain, Japan, Russia, Hong-Kong, India, Singapore, Oceania, South\/Latin America and North America.<\/p>\n<\/div> 4 rue Robert Pax T<\/span> +33 (0) 3 87 98 90 35<\/a><\/p>\n CONTACT US<\/a><\/p>\n<\/div> Merman Technology Company Ltd<\/p>\n T<\/span> +852 (0) 2581 2660<\/a><\/p>\n <\/i><\/a><\/p><\/center> Modern International<\/p>\n T<\/span> +91 (0) 11470 86481<\/a><\/p>\n <\/i><\/a><\/p> SMAAC<\/p>\n T<\/span> +39 (0) 02 76110330<\/a><\/p>\n <\/i><\/a><\/p> AJUMO<\/p>\n T<\/span> +49 (0) 40 600 195 0<\/a><\/p>\n <\/i><\/a><\/p> Christophe Zhang<\/p>\n T<\/span> +33 (0) 6 86 54 79 53<\/a><\/p>\n <\/i><\/a><\/p> Ertunnel<\/p>\n T<\/span> +90 (0) 312 219 40 47<\/a><\/p>\n <\/i><\/a><\/p> ABYO TM<\/p>\n<\/span><\/div>RESPONSIVE AND EFFICIENT SHIPPING<\/h3>\n
<\/span><\/div>QUALITY
\nCONTROL<\/h3>\n<\/span><\/div>VALIDATION AND TESTING<\/h3>\n
<\/span><\/div>BOLTING SYSTEMS<\/h2>\n
DOWEL SYSTEMS<\/h2>\n
CENTERING SYSTEMS AND SHEAR DOWELS<\/h2>\n
GROUT-LIFT SOCKETS<\/h2>\n
GUIDING RODS AND PACKERS<\/h2>\n
PRECAST ACCESSORIES AND SECURITY SYSTEMS<\/h2>\n
\n
FINITE ELEMENTS ANALYSIS<\/h2>\n
RELATED LINKS<\/h2>\n<\/div>
Explore our Tunnel Solutions<\/h4>\n
How to Find the Optimal Fixing Design to Meet All Tunnel Project Requirements<\/h4>\n
Tunneling Project Benefits from Innovative Fasteners<\/h4>\n
In the beginning we were quite skeptical about working with dowels in circumferential joints. However, after the success in the Crossrail project, plastic dowels have become an alternative to the classic bolt system for our contractors.<\/h2>\n<\/div>
The Components of Unrivaled Success<\/h2>\n
Sofrasar Tunnel Products<\/h2>\n
FRANCE<\/h2>\n
\n57910 HAMBACH – France<\/p>\nOptimas Tunnel Division<\/h2>\n
Representatives<\/h2>\n<\/div>
HONG KONG<\/h2>\n
INDIA<\/h2>\n
ITALY<\/h2>\n
JAPAN<\/h2>\n
CHINA<\/h2>\n
TURKEY<\/h2>\n
SPAIN, PORTUGAL<\/h2>\n