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Tierra Armada México developed an integral solution for a vehicular overpass located in Punta Mita, Nayarit, México. The solution consisted in the design and construction of a TechSpan® precast arch system on top of a precast foundation and a Reinforced Earth® retaining wall, using a TerraTrel® system. The combination of the TechSpan® and TerraTrel® systems allowed the main road circulation through two stages along 49.20 meters without interruption to traffic. The overpass solved the problem of transit times and will increase the level of service for users.
The Oman Southern Expressway is a 55 km long highway project. The project included 7 large precast arch underpass structures which were designed and supplied by Freyssinet Middle East – Reinforced Earth division, using the TechSpan® - precast arch system technology. Purpose of the structures is mitigation of storm water (wadi culverts) and provision of route for vehicles below highway (vehicle underpass). Two different arch sections were used, 15 m span x 7.5 m rise and 20 m span x 10 m rise. The maximum fill height over the arches was 35 meters above base level, requiring careful design of the arch and raft foundation profiles to minimize bending moments in the finished structure, and to deal with the very high axial forces at the base of the arch.
In the beginning of 2004 Qatar was ready to commence with building of a brand new airport to replace Doha International Airport, called the New Doha International Airport (NDIA). The airport is being constructed four kilometers from the existing facility and will replace Doha International Airport as Qatar's only international airport. The new Doha International Airport is a response to a projected demand for additional international passenger capacity to the region. The current airport handles 4.2 million passengers a year, whereas the new airport will be able to handle 24 million a year after the first phase of construction. The construction of a new airport and its infrastructure required protection of the existing Qatar Petroleum pipelines which were crossing construction site at several locations. Provided solution needed to provide proper protection to the pipeline and access for service and maintenance. Main challenge was construction above active pipelines and critical project schedule, which demanded fast and reliable solution.
In the frame of the Umm Bab Salwa Road in Qatar, RECO built 8 TechSpan® precast arches underpasses over a total length of 272 meters.
The client looked for a reliable solution to build a bridge made of 4 cells of 20 meters span each and 5,5 meters height. TechSpan® technology appeared to be the preferred option reching the client's expectations.
The Sharjah Cement Factory consulted RECo to find a solution to a critical challenge: moving 100 tons vehicle over gas pipelines. RECo achieved this challenge using TechSpan® precast arches to build a 10 meter span overpass over 22 meters length.
The project comprised the Maintenance, Improvement and Upgrading of Roads, Bridges and Culverts for the northern Emirates section of E11 road. This road serves as the main South – North Inter Emirate Link and as such carries considerable volume of traffic comprising a mix of cars, pickups and Heavy Vehicles. Upgrading of the existing road included carriageway widening and construction of new bridges above frequently flooded areas. Completed in 2000, the reinforced concrete arch bridge was built considerably cheaper than a RC girder bridge structure would have been. Additional benefit of excluding bridge bearings and expansion joints necessary for traditional bridge construction and consequentially reducing bridge life cycle cost brought this value engineering proposal into prime position choice.
The Ministry of Public Works in Qatar consulted the Reinforced Earth Company regarding the construction of 3 underpasses in the frame of the Northrn Relief Road development. TechSpan® precast arches were the ideal fit to reach the client's high quality and rapid execution requirements.
The Contract 3 of the NOH project is located Southwest of Doha City and provides the New Orbital Highway connecting Mesaieed to Salwa Road. It consists of approximately 48 km of road network and a total of 5 interchanges. The work was related to the protection of Qatar Petroleum pipelines and various utilities in addition to the construction of underpasses. Two different arch types are utilised to resolve more than 100 locations with total arch area of almost 200 000 square meters.
Sudair Industrial City is a 258 square kilometres planned city, which is strategically positioned and located approximately 120 km from Riyadh and 160 km from Al-Qassim. This project was small part of the masterplan and has involved construction of 15m span TechSpan arch intended for protection of existing utilities and provision of unrestricted underpass for vehicles pedestrians and animals below roadway.
Vault to enter the Mocoties tunnel, its main function is that of road protection, since in that area there were landslides that interfered with the vehicular passage.
The pedestrian tunnel project of CODELCO mining company's División Andina aims to link the Civic District's building with the Primary Crusher, thus securing an access for staff that does not interfere with the continuous transit of high tonnage trucks (624 Ton). This allows to improve the safety of the workers and to optimize the execution times. To achieve this, the TechSpan® solution made of engineered concrete precast arches was chosen.
RECo Canada recently provided TechSpan precast concrete arches as a crossing solution for a road realignment over a creek for the Regional Municipality of Niagara. Spanning 16.3m, 4.8m high and 12m long, the structure was used in conjunction with TerraClass segmental concrete panels with an Ashlar Stone finish and was completed to the satisfaction of the owner.
The project is composed of two walls of Tierra Armada® with a total surface area of 2,149.22 m² and four vaults of 13.00 m development length and 14.50 m long. The purpose of this structure is to form a hydraulic passage in the light traffic route of the Steelworks that allows the continuous flow of water from the Quebrada Bomba Negra.
Dingle Brook Bridge formed part of a single carriage way distributor road to serve the commission for New Towns housing development in Grappenhall Heys near Warrington. The bridge was designed to carry the road over a wooded ravine at an area known as Dingle Brook. Reinforced Earth Company (RECo) proposed to install TechSpan® arches as the main spanning elements, with Reinforced Earth spandrel and wingwalls forming the structural infill support over the top of the arch backs.RECo carried out full detailed design for the entire structure, with finite element analysis used to minimise the quantities of reinforcement and concrete used in fabrication of the TechSpan® arches. The time saved on the original program by utilising TechSpan® and Reinforced Earth™ systems was over four weeks.
Tierra Armada de Venezuela has designed and supplied Reinforced Earth® structures and TechSpan® arches for rail and road access to the facilities of the National Steel Plant in Piar, Bolivar State, in the north-east of the country. Reinforced Earth® structures include 9 bridge abutments and 4 retaining walls, representing nearly 11,000 m² of TerraClass® panels equipped with high-adherence steel strips. The TechSpan® arches with a total length of 130 m provide the solution for 4 overpasses above water.
Located on the 4th Pan-European axis connecting the cities of Dresden (Germany) and Istanbul (Turkey), the motorway Lugoj-Deva (Romania) is a 72 km stretch. The Joint Venture composed of Tierra Armada Spain and Terre Armée Romania won the contract for the design, manufacture, supply and assembling technical support of a 75 m double cut and cover tunnel made up of TechSpan® arches. The structure, located in a forest area, serves as an Ecoduct, passage allowing bears and other animals to cross over the motorway. The assembly of this first TechSpan® structure in Romania was carried out within one week.
To connect the city of Suwon with Gwangmyeong in the western suburbs of Seoul, Reinforced Earth built a 1.6 mile long structure made up of two cut-and-cover tunnels using TechSpan® arches, which were precast at the worksite.
To rebuild an old railway viaduct passing over a stream and a street, the Terre Armée division of Freyssinet Polska designed and installed TechSpan arches with a span of 14m and a maximum height of 3.6m and retaining structures made with TerraClass and TerraTrel facings. As the challenge was to ensure continuity of traffic, installation was carried out at night.
In the frame of the construction of the new Toluca-Naucalpan Highway in Mexico, a solution had to be found for a section in the Municipality of Lerma, where runoffs may affect the roads once they are operational. To mitigate the possible effects of scour and subsequent emergency situations, the construction of a drainage system with sufficient depth was included in the project to ensure the proper evacuation of any runoff. The contractor trusted Tierra Armada de Mexico with the design, manufacturing, transport, and assembly of a culvert built with prefabricated concrete elements. Two hundred seventy-six concrete pieces of 25 cm and 30 cm thickness were manufactured to build the 151 m structure.
In Peru, Tierra Armada Perú designed and supplied TechSpan® arches to cover the Antamina mine's pumping station. With a maximum span of 21.5 metres and a thickness of 50 to 60 cm, the structure comprises 95 precast elements. Its technical design and the production of its precast elements were complex.
Reinforced Earth Company Limited (RECo) has designed and supplied 150 TechSpan arches as part of the associated access requirements for A465 Dualling Section 3 Scheme in the Heads of the Valleys, South Wales, in addition to retaining walls forming the north portal of the underpass are up to 33m high making it the highest structure of it’s type constructed in the UK. The Heads of Valleys Dualling project is one of the Welsh Government’s key drivers for promoting social and economic regeneration in the area.
The New Orbital Highway will bypass the city of Doha to put a stop to the endless stream of trucks in the city centre. This nearly 200 kilometers peri-urban ring will connect the new Doha port to the Ras Laffan Industrial City in the north of the country. The second contract involves a 47 kilometers five-lane dual carriageway section for light vehicles with two lanes on each side for trucks and a total of 8 interchanges. Four different arch types were utilised to resolve 20 locations of intersection between existing utilities and roadway with total arch area of about 20 000 square meters.
Vault to conform access road to the Guaicoco Urbanization.
The Reinforced Earth Company was contracted to supply over 1000 lineal metres of precast TechSpan® arch units to sustain the loads applied by stockpiles up to 25m in height.
The Horse Track Underpass project took place in Abu Dhabi. It aimed to build a 6m span underpass of 20 meters total length. TechSpan® precast arches were used to deliver the structure.
Terra Armata worked on the SS77 motorway, a key infrastructure connecting Foligno and Tolentino. The company designed, in collaboration with Tierra Armada (Spain), and supplied 1500 linear metres of TechSpan arches and provided technical support for their installation. It also designed and supplied 20000 square meters of Reinforced Earth retaining walls with TerraClass panels.
The Reinforced Earth Company’s involvement on the Orphan School Creek section of the works consisted of the design and supply of 33 metres of TechSpan® arch and 118m² of TerraClass®, vertically ribbed retaining walls. The TechSpan® arch system was used in lieu of twin box culverts.
The Reinforced Earth Company was contracted to design, supply and supervise the erection of the Forbes Rail Overbridge. A 10 lineal metre precast TechSpan® tunnel incorporating approximately 70m² of TerraPlus® concrete retaining wing walls was designed to accommodate the current rail specification 300LA (AS 5100).
The Reinforced Earth Company’s involvement on the project was at a full-diamond interchange: Bombo Interchange, where RECO designed and supplied a 65-metre long TechSpan® arch railway tunnel.
The Reinforced Earth Company was approached to design and supply TechSpan® precast concrete tunnels for the reclaim conveyor and the emergency escape route to the new cast-in-place, reinforced concrete reclaim vault. The vault and tunnels were to be constructed in the middle of a very congested, fully operational, working mine facility.
The Reinforced Earth Company successfully tendered for the design and supply of the two reclaim tunnels with a precast concrete arch design based on the TechSpan® system.
The Reinforced Earth Company was contacted to design and supply a reclaim tunnel and escape tunnel under the new iron ore stockpile. This made the Cloudbreak TechSpan® arch tunnels some of the most heavily loaded structures RECO has designed in Australia to date and one of the most heavily loaded structures RECO has undertaken anywhere in the world.
The Reinforced Earth Company was appointed to design, manufacture, deliver and supervise the installation of the TechSpan® precast concrete arch and base slab system for both the Conveyor and Transportation Drift Tunnels. The client’s greatest concern was to make the design as cost-effective as possible.
The Reinforced Earth Company was appointed to design and supply the replacement culverts. RECO was awarded the work as based on previous experience, the client was confident that RECO could offer an efficient TechSpan® precast arch solution that could be rapidly installed. Having a local company on the ground, with precast facilities nearby was an added benefit.
For this project, BHP required a haul road tunnel to support iron ore laden dump trucks, which would facilitate an unobstructed system of transportation from the pit to the crushing facility. TechSpan® is optimised for transportation and installation for a cost-effective tunnel.
This project was built on Ocean Pond Road in Canada where TCH passes over the bridge. Several techniques were used including 36.53 m of TechSpan®, 166 m2 of Cruciform wall and 78 m2 of Terratrel wall. The retaining walls reach a height of 7.48m.
This project involved the construction of a escape tunnel, wall for crusher loading area and a reclaim tunnel with a conveyor system for the Material Handling System at the Melford Gypsum Mine Development. TechSpan® engineered precast arches were used to answer the client's need and high quality requirements.
This project achieved the milestone of being the first TechSpan® application in Ontario. The project features 10m of TechSpan® arch on spread footings and 233m2 of TerraClass® wall with a smooth grey finish. Perth Line 80 road pass over Nith river by this bridge.
This project was part of the extension of Nose Hill Drive to the west beyond Stoney rail in the north west corner of Calgary, Alberta. The project included the installation of a TechSpan® arch upon a raft foundation, with TerraClass® head walls flanking both ends, to serve as a creek crossing and an animal passage under the roadway. RECo operations made this small TechSpan® structure possible through the successful innovation of using custom wooden casting forms.
The project features 35 m of TechSpan® arch bridge and 1180 m2 of TerraClass® wall with smooth grey finish in city of Vaughan. It is constructed on Teston road and spans over Cold creek. Soil cover over the crown of arch is varying from 2.5 m to 3.5 m. The arch rests upon a pile cap.
The Duchesnay Creek bridge replacement project, located in North Bay, Ontario was constructed in 2016. Miller Northern Paving chose Reinforced Earth Company’s TechSpan® precast concrete arches as the preferred solution. The 14.6m span by 4.5m high precast concrete members were installed for a length of 18.75m, in approximately 11 hours.
This structure was required to replace a section of road on Highway 23 North, which was washed-out during the spring runoff. Maximum soil cover over the crown of arch is about 17.5m. The TechSpan® precast arch was constructed upon spread footings.
In the frame of the development of the Badr City to El Asher City Regional Road, the Ministry of Defense of Egypt was looking for reliable solutions to build 4 utility protections of various spans from 12 to 20 meters and over a total length of 307 meters. TechSpan® precast arches were built to successfully bring this project to life.
As part of the construction of two hydraulic structures, two TechSpan® arches were built on the A89 motorway near Thenon in Dordogne. The two TechSpan® arches, respectively 4.50 m and 4.13 m high for 7.30 m and 6.26 m opening, each measuring 130 m in length were made of 220 prefabricated elements.
This project took place in India in the frame of the construction of a bridge across a stream in a real estate. The solution was a combination of TechSpan® precast arches and TerraTrel® with green finish.
As part of the makor Salerno-Reggio Calabria expressway widening project in southern Italy, Terra Armata won the contract to supply materials and technical assistance for the construction of 4,500 m2 of Reinforced Earth® walls using TerraClass/Cruciform® facing panels and 21,000 m2 of inclined GeoTrel™ walls. The tight schedule – the main challenge of the project – was met thanks to rigorous weekly monitoring. The GeoTrel™ structures were erected in seven months and the Reinforced Earth® walls in five months. This success led to additional contract covering 2,000 m2 of GeoTrel™ walls and nearly 100 meters of TechSpan® structures.
The more than 570km S-19 Expressway crosses Poland north to south through four voivodships (provinces). Along the new 6 km section between the southeastern cities of Swilcza and Kielanowka, which has nine engineered structures, Freyssinet Polska is building four wildlife crossings using TechSpan® arches. These crossings, with a combined length of 160 meters, are equipped with 1,330 square metres of retaining walls. The structures are designed to prevent collisions between vehicles and wildlife crossing the expressway along their natural migration route.
TechSpan® precast arches were used in the frame of a tunnel extension project on the railway line between Eskoriatza and Aramaio in the Basque Country.
The project located in Spain consisted of drainage work realized with a TechSpan® concrete precast arch supported on a foundation and executed directly on site.
The increase in the number, speed and frequency of trains using West Coast Main Line, eventually implied increased delays at level crossings. RECo's TechSpan® arch provided an attractive cost effective solution that would meet British Waterway's requirements for a traditional structure to solve this issue and make the life of travellers easier.
At a span of 18.3 meters, this TechSpan® project is the largest span in North America. The complexity of the project was compounded by traffic flow requirements, staged construction, installation on a common center pier, along with a soft foundation which required vertical and battered piles to support the spread footings.
The project consisted in the construction of a safe storage facility for ammunition used for military training exercises. The unique TechSpanTechSpan® design considers blast loading to control propagation in the event of an explosion inside or nearby the storage "magazine".
The project consists in the modernization, efficiency and capacity upgrade of a lime processing, storage, and distribution facility.
The project consisted in the construction of a safe storage facility for ammunition used for military training exercises. The unique TechSpan® design considers blast loading to control propagation in the event of an explosion inside or nearby the storage "magazine".
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