THE CERTIFICATION PROCEDURE

The objective is to be able to deliver to the client or the contractor, a report of inspection which specifies that the built construction is technology compliant. A certificate of conformity to the TETRAPODE, ACCROPODE ™ technique, ACCROPODE ™ II, ECOPODE ™, CORELOC ™ or X-bloc® confirmed by the registered trademark CLAS TECHNOLOGY COMPLIANT recognizable by this stamp:

ACCROPODE™II ACCROPODE certification approbation clas

 

Step 1 Study the profiles


The profiles tell us the nature of the materials and the theoretical depth to which they must be found. They define the thicknesses of these materials. This is the reference set by the designer.


CORELOC ™ armour profile

ACCROPODE™II ACCROPODE certification approbation clas

Study 2 The placement drawings

The installation plan tells us if there is a peculiarity on the laying area, such as a rapid change of depth or the connection between two block sizes, for example.

 

ACCROPODE ™ II placement drawing

ACCROPODE™II ACCROPODE certification approbation clas

 

 

Step 3 The repositories

TID can evolve from year to year depending on advances in technical knowledge and feedback. CLAS uses the TID of your project.

CLAS also has its repository resulting from more than 20 years of implementation of the TETRAPODE, ACCROPODE ™, ACCROPODE ™ II, ECOPODE ™, CORELOC ™ and X-bloc ® blocks which supplement or replace, if necessary the documents provided by the license vendors.

 

Step 4 The inspections

Being an inspector cannot be improvised. It is a profession in its own right that can be learned. Being a professional diver is not enough, but it is essential. An inspector must be rigorous, critical, have a sense of observation and authority.

 

4-1 Inspection of the horizontal berm and the underlayer

ACCROPODE™II ACCROPODE certification approbation clas

 

 

Inspection using a multibeam echo sounder showing the profile perfectly within +/- 0.2 meter tolerances and approved by the company and customer survey department

 

ACCROPODE™II ACCROPODE certification approbation clas

 

CLAS inspection on the same profile showing gaps and protruding rocks on an irregular profile de + or – 1,7 meters and more exactly on the same profile.

ACCROPODE™II ACCROPODE certification approbation clas

This is not an extreme case and it is not uncommon. The underlay does not conform to design or technology. The installation of the TETRAPODE, ACCROPODE™, ACCROPODE™II, ECOPODE ™, CORELOC™ or X-bloc® blocks, which must comply with the tolerance rules of the underlayer as defined in their respective TID, is not possible. This marks a stop point. CLAS inspectors produce a video with measures to justify their decisions.

ACCROPODE™II ACCROPODE certification approbation clas

When the underlayer and the horizontal berm are approved the placement of TETRAPODE, ACCROPODE ™, ACCROPODE ™ II, ECOPODE ™, CORELOC ™ or X-bloc® blocks is allowed.

Technology Compliance Report for ACCROPODE ™ II underlayer

ACCROPODE™II ACCROPODE certification approbation clas

 

The TETRAPODE, ACCROPODE ™, ACCROPODE ™ II, ECOPODE ™, CORELOC ™ or X-bloc® blocks are checked several times a day to limit disassembly.

Inspection of an ACCROPODE ™ II armour and evidence of bad interlocking of one ACCROPODE™II

ACCROPODE™II ACCROPODE certification approbation clas

 

When the placement is TECHNOLOGY COMPLIANT the ACCROPODEII armour is filmed

ACCROPODE™II ACCROPODE certification approbation clas

 

The contractor must then place the toe mount protection before building the armour out of the water. As long as the underwater armour is not properly wedged by the toe mount, the TETRAPODE, ACCROPODE™, ACCROPODE™II, ECOPODE™, CORELOC™ or X-bloc® blocks are suspended.

 

The contact between the toe mount and the armour blocks is controlled and filmed.

 

ACCROPODE™II ACCROPODE certification approbation clas

 

When the toe mount is in place, TETRAPODE, ACCROPODE™, ACCROPODE™II, ECOPODE™, CORELOC™ or X-bloc® can be placed out of the water.

The construction out of the water is the subject of the same attentions as the construction under the water. CLAS inspectors conduct a walking tour that is essential and a drone inspection.

 

CLAS inspector on an ACCROPODEII armour

ACCROPODE™II ACCROPODE certification approbation clas

 

The walking tour is completed by a drone inspection. CLAS has developed a special procedure for the use of the drone, which allows us to collect all the information that the walking tour does not give.

 

X-bloc® inspected by drone

ACCROPODE™II ACCROPODE certification approbation clas

 

When the carapace is technically compliant, the crest can be laid and inspected in the same way. Non-compliance marks a stopping point.


Drone inspection of an ACCROPODE ™ II armour crest

ACCROPODE™II ACCROPODE certification approbation clas

 

Each step of the construction that marks a stop point in the event of non-compliance gives rise to an inspection report. Once the various construction steps have been approved and the proof of compliance established, the CLAS inspector drafts the Technology Compliance Report.

 

Example de TCR established for an X-bloc® armour

 

ACCROPODE™II ACCROPODE certification approbation clas

 

ACCROPODE™II ACCROPODE certification approbation clas

 

When all stages of construction are completed, from the foundation of the work to the crest, CLAS hands over to the owner or his representative, the complete final document no later than one week after the end of the construction.


All quality assurance documents prepared by CLAS inspectors are updated in real time on site during construction. CLAS's intervention generates no delay in decision making and no delay in payment for the contractor.

The certification procedure put in place by the CLAS inspectors provides the certainty of having ACCROPODE ™, TETRAPODE, ACCROPODE ™ II, ECOPODE ™, CORELOC ™ or X-bloc® CLASS A

 

Usefull link:  http://www.clasexpertise.com/index.php?id=4

 

 

ADDED VALUE OF OUR CERTIFICATION

 

The durability of an TETRAPODE, ACCROPODE™, ACCROPODE™II, ECOPODE™, CORELOC™ or X-bloc® armour is defined by the designer. It is acquired when the design is respected and when particular care is taken in the construction of the armour and its underlayer, to correspond at least to the 3D reduced model. The criteria for accepting the armour must be met without exception.

They are defined by the technical specifications issued under the license agreement. By CLI for ACCROPODE™, ACCROPODE™II, ECOPODE™ and CORELOC™ blocks. By DMC for X-bloc®.
The means implemented to ensure that these criteria are met must enable non-compliances to be identified without exception.


Exception to this rule can lead to localized or significant disorders. Repairs often by sea will be very expensive.
In extreme cases, the design is not respected in order to increase the profit margin by saving on materials.


Installation of ACCROPODE™II without underlay, directly on the core. The toe and the first line left very quickly.

ACCROPODE™II ACCROPODE certification approbation clas

 

Companies can easily make false profiles by using a multibeam sounder whose data are easily modifiable:


Project with multibeams

ACCROPODE™II ACCROPODE certification approbation clas

Inspection on the profile approved using tolerances + or – 0,4 meter.

ACCROPODE™II ACCROPODE certification approbation clas

 

On another project the multibeam survey of the profile was perfect:

ACCROPODE™II ACCROPODE certification approbation clas

 

In reality we measure holes of 1.7 meters and more for a tolerance of + or - 0.3 meters.

ACCROPODE™II ACCROPODE certification approbation clas

The data produced by the multibeam can be easily distorted to present acceptable profiles in place of a completely out-of-tolerance underlayer.

 

Placing tools have limitations that salers do not indicate


ECHOSCOPE®
On DAS ISLAND ECHOSCOPE® was used to place the X-bloc® and to approve the underwater work. Major disruptions that occurred after the approval led CLAS inspectors to put in place a certification procedure for the reconstruction of 5000 meters of X-bloc® armour.


https://youtu.be/OROspj0EB1Y


On Puerto Moin, VAN OORD, a highly experienced and more cautious company, asked CLAS to evaluate the latest version of the ECOSCOPE® that was planned to approve the X-bloc® installation work. We conducted two evaluations: at the beginning of the project and after six months of use with the same operators. We made an inspection with good visibility on X.bloc® approved by ECHOSCOPE®.

The figure below summarizes the conclusions of our report after six months of training operators:

On the other hand, all the comparative tests carried out on the ECHOSCOPE® installation up to and including 2016 conclude that the system sometimes highlights non-conformities that do not exist and does not reveal non-conformities that exist. It is due to the mask effect that concerns the acoustic tools even the finest as the ARIS acoustic camera that we tested in 2016. At Puerto Moin we also brought the proofs that nonconformities highlighted by ECHOSCOPE® images did not exist in reality.

https://youtu.be/XZ3UmmlpMMA

Usefull link:  http://www.clasexpertise.com/index.php?lang=en&id=300&photos_rubrique_id=&photos_sous_rubrique_id=&videos_rubrique_id=&pdf_rubrique_id=&pdf_sous_rubrique_id=&references_rubrique_id=&references_sous_rubrique_id=&outils_pose_rubrique_id=4

 

The POSIBLOC™

At RAS LAFFAN 2008 with ACCROPODE™ 4 m3 and at KHALIFA in 2009 with ACCROPODE™ 0.8 m3, the system did not work.The tests concluded that the system should be stopped despite the increased assistance provided by MESURIS.

In BARAKAH in 2013 with CORELOC™ of 2 m3 the system was stopped by NMDC and KEPCO Korean company in charge of building the ABU DHABI nuclear power plant. The system did not work satisfactorily.

 

 

https://youtu.be/OyuoV07hx1g

 

The system as we saw it in 2017 on ALFAW is improved compared to the previous experiences that we had, so far the precision limited to + or - 0.15 meter generates discrepancies between reality and computer image, in particular by signaling missing contacts while these contacts exist, which led to CORELOC™ breakages in trying to adjust the placement. The system also signals established contacts which in reality are not, causing undetectable contact faults on computer generated images or on acoustic tools fixed on a frame. Out of profiles and holes are not correctly identified and again nonconformities that do not exist are reported by the software. The production is limited to 3 or 4 units per hour and this pose has not been validated and required repairs.

https://youtu.be/gFVVIZo4Wak

 

Divers must also be checked and the procedures they apply validated by specialists in the armours inspection for ACCROPODE™, ACCROPODE™II, CORELOC™, ECOPODE™ and X.bloc®

On one project we found that the divers of the company who supervised the ACCROPODE™ installation used the video of an approved ACCROPODE™ panel to film it from different angles and present the single panel video as different panels, in order to mask major nonconformities. We put an end to it.

Usefull link:  http://www.clasexpertise.com/index.php?lang=en&id=300&photos_rubrique_id=&photos_sous_rubrique_id=&videos_rubrique_id=&pdf_rubrique_id=&pdf_sous_rubrique_id=&references_rubrique_id=&references_sous_rubrique_id=&outils_pose_rubrique_id=5

 

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Clas certification - 2018 - Tous droits réservés - Mentions légales - Design : Pygmalis - Intégration : Ingeitec