• Projet National C2ROP
Chutes de blocs, risques rocheux et ouvrages de protection


P1 – Guides and recommendations

Operations of the rockfall protections are intended to secure people and property. In the absence of regulations on results to be achieved, the implementation of the operations of the rockfall protection is framed by respect “rules of art”, fruit of the experience feedback on operations already carried out.
Operations of this type grow and are carried out by masters of works very various, sometimes little experienced and in the inability to identify their needs as well as the General Organization of these operations.
So, following the approach chosen by the contracting authority and / or the driver operation, and depending on their level of expertise, the practices are very different and can lead to considerable extra costs, even in dangerous situations.

Today, it appears important to supervise the uses and to define common principles, the result of the confrontation of the experiences of the main actors who are all grouped in the national project C2ROP.

P1.1 - Operation management guide

P1.2 - Recommendations for deviatoring/ deflecting structures

P1.3 - Recommendations merlon design

P1.4 - Recommendations for instrumental monitoring

P1.5 - Guide for maintenance et rehabilitation of screens

P2 – Experimentation

Any modelling must be confronted with the reality to validate its robustness. It is therefore essential to perform instrumented tests so that the national project to succeed to a numerical simulation know-how that is sufficiently reliable to be used in design by companies and study of actual behavior by owners / contractors.

P2.1 - Experimentation on screen: scale model and test on aged screen for rehabilitation

P2.2 - Experimentation on deviatoring / deflecting structures

P2.3 - Experimentation on merlon

P2.4 - Experimentation on anchoring

P2.5 - Experimentation on biological engineering

P3 – modeling

P3.1 - Modeling on flexible work

P3.2 - Modelling on merlon

P3.3 - Modelling of biological engineering

P4 – new concept

Events affecting infrastructure with important strategic issues, and in order to restore a partial traffic within a very short time or to allow teams to work in acceptable security conditions, it is often temporary works of all kinds.
Interventions and reinstatements of circulations were then operated in degraded security conditions which are often very uncertain.
Currently, these situations are managed in the emergency, both for the phases of engineering for the phases of production, generating uncertain, little optimized, and even dangerous situations for the users or stakeholders.
It is appropriate to provide a ready-made tool and can be pre-positioned, allowing a partial re-circulation in very short periods of time, on the other hand these devices could be used as interim protection when carrying out work under conditions of enhanced security for users.

Administrative & Financing Management

9 rue de Berri
75008 PARIS
E-mail : contact@irex.asso.fr
Tel : +33 (0)1 44 13 32 79

Coordination in Rhône-Alpes Area

55 avenue Galline
E-mail : indura@indura.fr
Tel : 04 82 53 51 33


President : Roland MISTRAL (Département de la Savoie)
Director : Jacques MARTIN (Egis)
Scientific Director : François NICOT (Irstea)
Dissemination Director : Marianne CHAHINE (Cerema)

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