Back to top

Clear run to Versoud

Baudin Chateauneuf

A new bridge constructed over a railway line minimised track disruption with the Mammut 350 formwork and SecuritBasic safety system.

The Goal

To build a new bridge over an existing railway line without disruption
A new 1.7-kilometre-long road between Le Versoud and Villard-Bonnot required a bridge over the existing railway line.


With panel sizes up to 3.5m x 2.5m, it is by far the biggest system on the Chilean market. And the fact that it needs so few accessories per square metre significantly boosts productivity.

The Project

The new bridge piers were meticulously planned to be constructed in the least disruptive manner for the railway line. 

Avoiding disruption to the railway line was the top priority, so each bridge pier needed to be poured in a single cycle in one day. Due to the location of the piers adjacent to the railway line, the airflow from the passing trains would also affect the stability of the formwork.

At the same time, the cantilevers of the piers had to be integrated during the pour. However, additional decking or heavy shoring would not be possible as they would have obstructed the railway line.

The Solution

  1. Expert technical solutions
    To pour each pier in just one day, 350m³ of fresh concrete would need to be poured in ten hours. To avoid large wood fillers, MEVA suggested using STB corner frames, thus allowing the formwork to be created in a shape that corresponded to the pier geometry.

    On the construction site, the Mammut 350 wall formwork was able to make full use of its strengths. The system, which has a capacity of up to 100kN/m², can easily cope with the fresh-concrete pour speed corresponding to a pressure loading of 70kN/m². This made it the perfect choice for the rapid pier construction.
    Formwork drawings for concrete bridge construction using MEVA formwork products 

  2. Working safely at height 

    For the cantilevers – which were 79 centimetres long and needed to be poured at a height of 10 metres – access was an issue. To get around this, the SecuritBasic safety system was used in conjunction with the Mammut 350 panels. The working platforms enable safe and cost-effective work at height and can be flexibly adapted to suit the formwork structure. This way, the cantilevers could be poured without infringing upon the railway line below. 

    The complete unit comprising a safety system and wall formwork panels was assembled safely and easily on the ground and moved into position by crane.

The Outcome

The bridge was completed in the summer of 2019, after the forming work was completed without any issues. At the end of 2020, construction was completed and this important transversal road opened to traffic. The improved transport link between the two towns will not only improve local traffic conditions, but also support the expansion of two newly built industrial estates in the area.

The MEVA team was able to offer us a solution without additional decking or heavy shoring for the cantilevering of the header. It was this argument that guided our choice of formwork system. Thus, the pouring of each pier was carried out in a single cycle, i.e. 350m³ of concrete were poured in 10 hours.

François Rigaldies, Senior Civil Engineer at Baudin

Featured Products

Baudin Chateauneuf


Le Versoud, France

Communauté de commune du Gresivaudan

Engineering & Support:
MEVA Systèmes de Coffrage SNC, France


Got any questions about this topic?

Why not get in touch, we are here to help you.

If you want to know more about this or any other projects please use the contact form to get in touch, we would love to hear from you.

For contact details specific to this region, visit the contact us page to find out more.

These fields are required

This field is for validation purposes and should be left unchanged.
Close search and go back to site