Freyssinet Thailand

Freyssinet stay cables have provided innovative solutions with a multi-strand parallel system that allows for the installation and tensioning of each strand individually, along with individual protection against corrosion and the possibility of removing and replacing each strand if necessary.

Freyssinet Thailand has been involved in the installation of stay cables for the Southern Outer Ring Road and the Tossa Marachan Bridge (in honor of King Rama X), both of which have the longest main spans in Thailand.

Freyssinet, as the innovator of prestressing technology, has offered prestressing systems worldwide, combining high performance with durability across various applications, including bridges, LNG tanks, offshore platforms, wind turbines, and more.

Freyssinet Thailand has been carrying out prestressing work in Thailand since 1999, with an average of 100 projects per year.

With over 70 years of experience in bridge construction projects around the world, Freyssinet has forged a global reputation for its skill and expertise.

Freyssinet Thailand has provided technical solutions involving a broad array of techniques, including formwork traveler design for balanced cantilever bridges and launcher gantries for precast segment viaducts.

Freyssinet Thailand has provided engineering assistance for lifting, sliding, and rotation systems to move structures into position. Some of our previous reference projects include:

• Lifting the steel link bridge for the Starview Condominium project
• Sliding the steel roof of the Queen Sirikit National Convention Center

Reinforced Earth has developed unrivaled expertise and experience in reinforced backfill applications and soil-structure interaction. Our technical solutions are defined by four key functions corresponding to the purpose of the structure being designed: RETAIN, CROSS, PROTECT, STRENGTHEN.

• RETAIN: MSE Wall, Terralink, and Reinforced Soil Slope
• CROSS: TechSpan Precast Arch
• PROTECT: TechRevetment, Rockfall system, and Bundwall
• STRENGTHEN: Geosynthetics products, Armalynk, TerraTextile, and ArmaGrid

Freyssinet offers a variety of jacking techniques, including applications that address challenges in both new construction and existing structures or buildings. Jacks can be operated vertically to lift structures, as well as horizontally to move them.

Freyssinet’s capabilities include bridge lifting and sliding, bearing replacement, high-strength bar tensioning, load transfer, pre-stressing, settlement control and compensation jacking, force measurement, and weighing.

The Freyssinet technique, combined with the dry-process shotcrete method (Foreva® Shotcrete), produces concrete up to class B60.

This method offers several advantages:

Fast and flexible application
Complete adhesion to the prepared substrate
Optimal concrete compaction for enhanced durability
Controlled filling and forming through flow rate adjustment and continuous mix flow in the nozzle
Limited shrinkage of the applied concrete due to precise water adjustment for hydration
Shotcrete can be used for structural alterations alongside other techniques such as installing reinforcement, Carbon Fibre Fabric (Foreva TFC®), metal fibers, additional prestressing, or tie rods.

Freyssinet provides solutions for controlling the progression of reinforcement corrosion in reinforced concrete at all stages of development.

Our solution for structural strengthening involves using carbon fiber reinforced polymer (CFRP) or additional prestressing. This approach enhances the strength of slabs under flexure, beams under bending and shear, columns, and any elements in tension. It also improves the ductility of elements, especially those subjected to accidental dynamic stresses, such as earthquakes.

In the heart of Bangkok, Freyssinet worked on the construction of the stay cables for the Rama III – Dao Khanong bridge. This bridge runs parallel to the Rama IX bridge, which was built in 1987 over the Chao Phraya River.

The Thotsamarachan Bridge is a cable-stayed bridge with two H-shaped pylons, a 450-meter-long main span, and 152 stay cables ranging from 40.5 to 233.7 meters in length. The deck is quite large, requiring the use of 48 to 109 strands of 15.7 mm per cable. We also supplied equipment to monitor the structural health of the bridge.

The Queen Sirikit National Convention Center (QSNCC) has hosted national and international events for the past 30 years. After renovation, QSNCC will be reintroduced as the largest convention center in Bangkok’s CBD.

This project involves the design of a commuter rail system serving the Bangkok Metropolitan area. Our scope of work includes:

• Post-tensioning work in precast columns, precast segments, viaducts, and Bangsue Grand Station
• Engineering services and temporary design work for: • Hopewell demolition • Precast column erection • Precast portal erection • Main line launching gantry • Grand station launching gantry • Casting yard layout

Freyssinet has been involved in the modification design of formwork travelers for the construction of the balanced cantilever bridge over the Ladprao Intersection.

• Span length for the balanced cantilever bridge: 41 + 77 + 77 + 77 + 77 + 41 m
• Weight of form travelers: 140 tons per pair

This structure is a symmetrical cable-stayed bridge with two A-shaped pylons, a 500-meter main span, and 168 stay cables in two lateral planes. It has a river clearance of 50.5 meters. The bridge crosses the Chao Phraya River and is designed with six traffic lanes, three on each side.

Freyssinet Thailand introduced a conventional method for massive frame lifting using three high-performance hydraulic jacks, each with a nominal cylinder capacity of 70 tons. The total height of the hanging points was 70 meters above ground level, while the lifting rate was maintained at 7 meters per hour.

Retaining wall system: reinforced earth® wall
Maximum wall height: 11.60 m
Reinforcement: geosynthetics reinforcement + GeoMega system
Panel type: column, plain
Panel dimensions: 1.5 x 1.5 m

Retaining wall system: reinforced earth® wall and TerraLink™ wall
Maximum wall height: 7.025 m
Reinforcement: HA steel strip reinforcement
Panel type: plain
Panel dimensions: 1.5 x 1.5 m

Type of solution: bridge jacking
After 40 years, the I-Girders of the first expressway, supported by elastomeric bearings with half joints, were damaged and replaced using a jacking system with synchronous control.

Type of solution: Bridge jacking
The columns were inclined due to the incorrect installation of mechanical bearings. Freyssinet was tasked with correcting the inclination by pushing the columns back under traffic, including the replacement of the mechanical bearings.

Type of solution: shotcrete and corrosion control
Twenty-six years after the opening of Maptaput Industrial Port, which is one kilometer in length, Freyssinet was awarded the repair project. The work involved shotcrete application, galvanic protection, silane coating, and epoxy injection. Project operations needed to be planned in coordination with vessel traffic and sea levels.

Type of solution: shotcrete
After 40 years of use, concrete spalling occurred under the deck of the first expressway abutment. Freyssinet installed additional rebar and applied shotcrete over 276 square meters.

Type of solution: additional prestressing and corrosion control
A 1.0-meter diameter bored pile was added, and the crossbeam was strengthened with additional prestressing, including corrosion control measures. The bridge crossing the Bangpakong River was struck by a large vessel. Freyssinet was tasked with implementing these solutions under heavy traffic conditions.

Type of solution: CFRP
Several solutions were applied to the motorway structure, including CFRP, bearing replacement, and concrete repair. The Department of Highways approved Freyssinet’s solutions for repairing the major motorway south of Bangkok.

Type of solution: Additional PT
The Pinklao Bridge, which has been in use for 50 years, features cantilever structures that cross the Chao Phraya River in the center of Bangkok. Vertical hinges were added to the main span of the bridge, and post-tensioning (PT) was installed, all while the bridge remained in use under traffic.

Type of solution: cable maintenance
The Kanchanapisek Cable-Stayed Bridge, the largest bridge in Thailand with a 500-meter main span, has been in operation for 15 years, supported by a Freyssinet cable system. Freyssinet was assigned to evaluate the forces in the cables using load cells and to inspect the anchorages. The hardware of the cable system and the forces remain in good condition.