Manoeuvres in the viaduct works of the extension of the South Metropolitan Bypass over the Bolintxu valley

Manoeuvres at the viaduct works for the extension of the South Metropolitan Bypass over the Bolintxu valley.

Second Phase of the South Metropolitan Bypass. Bolintxu viaducts

Client: UTE Pagabidea

The works of the second phase of the South Metropolitan Bypass include the installation of two parallel viaducts over the Bolintxu valley.

This part of the project requires minimising the possible environmental impact on the area as much as possible, which is why the process will be a very unique construction milestone.

One of the first steps is the placement of provisional metal towers weighing 145 tonnes each, which will be used for the subsequent assembly of the metal arches of the two viaducts.

For this complex manoeuvre, thanks to our own resources, our technical department developed a solution involving several of our 800, 500 and 300 tonne cranes.

TAV Amorebieta

Client: Precon. UTE Durango Amorebieta

LTM1500-8.1 of 500 t and LTM1750-9.1 of 750 t for unloading and subsequently assembling 12 concrete beams with a length of 40 m and a maximum weight of 180 t that came from Castellon in several overnight journeys. The beams were placed on up to 42-metre high piles. One of the main problems to carry out this manoeuvre had to do with the difficult terrain, which hindered the entry and subsequent assembly of the cranes in their final location.

Customer: U.T.E. Arnotegi

The special needs of our client for the transport of excavation materials in the extension of the Supersur, required to save some of the branches of the motorway already in operation.
In order to do this, we designed and planned a nocturnal maneuver, with cutting of the track, to be able to locate a footbridge of 100 tons of weight, 30 meters long and 10 meters wide, in its precise place.

A metallic structure to be able to transfer the almost 600,000 m3 of excavation material extracted from the extension of the tunnels of the southern metropolitan variant to a controlled spillway.

Two cranes were involved in the manoeuvre, a 350-ton Liehberr LTM 1,350 and a 220-ton Demag AC200. 5-1, which were in charge of lifting and handling the structure. For the transfer we used two 850 hp MAN tractors with Nooteboom platform. An Ibarrondo team of 8 people made sure that all the movement was precise in time and form.

Viaduct of Gerediaga, Durango

The connection of highway AP-8 at Gerediaga, in Abadiño, with the Elorrio bypass was a real challenge. An almost urban setting, the meeting point of various roads and Euskotren railway turned the work into a major puzzle.

We were in charge of the assembly of the metal structure viaducts next to the connection with the AP-8. One of them is 865 metres in length and the other is 649 metres and forks into another 187-metre long viaduct.

The work was started in July 2014 and finished in April 2015. During this time we kept a permanent team of 10 people on the site and used different equipment: Demag AC 700, Demag AC 500, Demag AC 350 and Liehberr LTM 1.500 as well as smaller support and service cranes, Liehberr LTM 1.130 and 1.090.

TAV. Viaduct of Bergara

Customer: UTE Abergara

Since the beginning of 2013 and for eight months we worked on the construction of the viaduct for the high-speed train across Bergara.

During this time diverse equipment from our company took part in the construction work: Liehberr LTM 1.055, Liehberr LTM 1.100, Demag AC 200, Liehberr 1.350, Demag AC 500 and Liehber LTM 1.040, together with their corresponding support trucks and boom trucks to carry materials.
Our main task involved handling formwork carriages and systems of boards and pillars.

The viaduct has 15 spans and a length above 1,000 metres. The maximum pillar height is 89 metres.