The most used artificial blocks

PRESENTATION OF THE ACCROPODE™ BLOCK

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block  ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block  ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

The ACCROPODE ™ block was patented in 1980:

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

The ACCROPODE ™ block has revolutionized the construction techniques for breakwater construction. It is, in our opinion, based on more than twenty years of construction and dike expertise, the most robust and reliable of all single-layer armor blocks and the one offering the best value for money.

 

ACCROPODE ™ LEGAL SITUATION

 

ACCROPODE ™ was patented over twenty years ago.

 

The ACCROPODE ™ has fallen into the public domain.

 

Link blocks free of licence.

 

 

INSTALLING THE ACCROPODE ™ BLOCK

Contacts with lower row ACCROPODE ™ must be established with solid support. The main obstacle to this good interlocking is due to the hooking of the ACCROPODE ™ on the riprap of the underlayer which stops the movement down of the block. The only way to get over this constant problem is to visually ensure that the block is in its final interlocking position. In about 40% of cases, a natural installation will lead to poor interlocking and the ACCROPODE ™ thus installed will still have the possibility of further descending under the action of its weight and / or the sea.

 

Changing the orientation of the blocks does not eliminate this problem. Only a visual inspection of each block when it is adjusted between the two ACCROPODE ™ of the lower row allows this, subject to mastering the principle of interlocking and the inspection procedures.

 

 

Appearance of a correctly placed ACCROPODE ™ armour :

The supports with the lower row are well established. There are no contact defaults.

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

 

 

Underwater, there is still a strong interlocking of the blocks with firm support on the ACCROPODE ™ of the lower row and strong locking by the ACCROPODE ™ of the upper row.

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

On and underwater the orientations of the blocks are varied. No ACCROPODE ™ can descend or oscillate. There are no holes. There is no out off-profile ACCROPODE ™.

 

 

 

MOST COMMON PLACEMENT DEFAULTS

 

ACCROPODE ™ out of profile

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

Possible origin

Failure of the underlay, insufficient training of installation teams, installation error, ineffective installation control.

 

Risk

An ACCROPODE ™ out of profile can be pulled out by strong swells. In its fall it risks breaking the ACCROPODE ™ underneath and its extraction will cause a large hole. A single non-profile ACCROPODE ™ which is extracted can initiate unraveling of the armour in the affected area and lead to a major disorder.

 

Required action

Disassemble the area and correctly nest the ACCROPODE ™. If the source of the nonconformity is a defect in the underlayment, the underlayment must be adjusted before installing the ACCROPODE ™.

 

 

ACCROPODE ™ mounted in columns

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

Column mounting is not indicated as a non-compliance in the technical reference published by the license vendor. The reference system mentions compliance with the diamond mesh and tolerates occasional deviations. However, we have found that the ACCROPODE ™ columnar assembly produces movement and breakage and needs to be corrected. That’s why we mention it.

 

Possible origin

The technical repository of the license vendor authorizes the occasional non-compliance with the installation mesh and this favors the appearance of this type of problem. However, it is also indicated that the ACCROPODE ™ must be nested between them and not have freedom of movement. The installation in ACCROPODE ™ columns which have freedom of movement is attributable to insufficient training of the installation teams, an installation error, inefficient installation control.

 

Risk

ACCROPODE ™ mounted in columns are generally unstable and do not have the right supports with the lower row. They are generally not properly blocked by the ACCROPODE ™ of the higher row. They will move and possibly break. If they do break the area will start to unravel and will need to be rebuilt.

 

Required action

Normally, the area mounted in columns should be dismantled and these ACCROPODE ™ correctly positioned respecting the installation mesh. CLAS has know-how that allows this type of non-compliance to be resolved without dismantling the ACCROPODE ™ above, in the majority of cases.

 

 

 

ACCROPODE ™ badly interlocked

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

Possible origin

A poorly interlocked ACCROPODE ™ generally got caught in a riprap on the underlayer and did not descend to its final interlocked position. This concerns about 40% of ACCROPODE ™ placed "naturally" on the target position. The cause is attributable to insufficient training of the placing teams, an installation error, ineffective installation control.

 

 

Risk

Poorly interlocked ACCROPODE ™ are unstable and do not have the right supports between them. They will move and possibly break. If they do break the area will start to unravel and will need to be rebuilt.

 

 

Required action

Normally the area should be dismantled and these ACCROPODE ™ correctly positioned respecting the placement mesh and the strong supports with the ACCROPODE ™ of the lower row. CLAS has the know-how that allows this type of non-compliance to be resolved without dismantling the ACCROPODE ™ above in the majority of cases.

 

ACCROPODE ™ broken

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

Possible origin

The quality of the concrete should be checked first. If the quality of the concrete is not in question, the origin is then linked to movement of the ACCROPODE ™ due to poor interlocking during installation. The cause is then attributable to the insufficient training of the placing teams, an installation error, the ineffective placement control.

 

Risk

When broken ACCROPODE ™ no longer participate effectively in interlocking, the area begins to unravel and will need to be rebuilt.

 

Required action

The action required depends on the position of the broken ACCROPODE ™. For example, an ACCROPODE ™ in the first row which has been broken by rockfill from the toe mount protection, but which is properly blocked, should not be replaced. If the broken ACCROPODE ™ is in the middle of the slope and no longer participates in the interlocking of the area, then the area must be dismantled and the broken ACCROPODE ™ replaced.

 

 

Holes

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

Origin

Insufficient training of installation teams, installation error, ineffective installation control.

 

Risk

The underlayer rip-rap we see can be split and mined. The area is likely to move causing ACCROPODE ™ to break which will then initiate the unraveling of the armour.

 

Required action

It depends on the position of the hole. An isolated hole in an otherwise properly constructed area can be plugged with a bag of concrete, for example, provided that once installed the bag of concrete cannot be extracted. If this is not possible, or if the hole is close to the surface, the area must be dismantled and the ACCROPODE ™ re-installed properly.

 

ACCROPODE ™ placed with the nose in the slope

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

Origin

Insufficient training of installation teams, installation error, ineffective installation control.

 

Risk

This type of positioning can cause movement and therefore breakage of ACCROPODE ™. ACCROPODE ™ breakage initiates the gradual unraveling of the armour.

 

Required action

Usually the area must be dismantled and the ACCROPODE ™ refitted. CLAS has the know-how that allows this type of non-compliance to be adjusted without dismantling in the majority of cases.

 

ACCROPODE ™ placed anvil against anvil

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

Origin

Insufficient training of installation teams, installation error, ineffective installation control.

 

Risk

This type of positioning creates a hard point and blocks the necessary micro adjustments sometimes. We see in this image that the area has interlocking defects that initiate the gradual unraveling of the armour.

 

Required action

Usually the area must be dismantled and the ACCROPODE ™ refitted. CLAS has the know-how that allows this type of non-compliance to be adjusted without dismantling in the majority of cases.

 

Other installation faults exist, which are less common and will be explained to you by our inspectors.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EXPECTED PLACEMENT RATE WITH ACCROPODE™

 

 

The pace of installation depends on the following factors:

 

- Size of the blocks: The bigger the block, the more difficult it is to move and the more it is subject to breakage in the event of an impact.

 

- Placing machines: The hydraulic excavator allows a double placement rate compared to the wirecrane, but its use is limited to small blocks, up to approximately 5 m3.

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

- Quality of the underlayer: an underlayment that does not respect the tolerances and has significant roughness will slow down the placement and limit the possibilities of interlocking the blocks.

 

 

- Quality of the training of the placing team: a good theoretical and practical training which includes training in safety, the ACCROPODE ™ technique and the gradual increase in the installation rate, lasts about a month. It is not only training, it is learning that obeys pedagogical rules and progression that can only be taught by construction professionals.

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

- Visibility: good visibility will facilitate visual inspection operations. The operator must be able to see the slope from the front, perpendicular to the slope surface, and receive information on the points of contact with the ACCROPODE ™ in the lower row and with the slope. Only a diver can properly carry out these checks. In clear water it is very fast, in dirty water it takes longer and requires extensive learning, especially in safety.

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

 

- Installation tools used: There are three ways to install:

 

1 Divers is the fastest and most reliable system.

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

The seller of the ACCROPODE ™ license recently wrote about this:

 

"A diver or camera control to see the interlocking of each block is necessary. It is essential that these checks take place regularly, several times a day if necessary. "

 

“Divers with cameras allow better interlocking than any other system. "

 

 

Divers link

 

2 The POSIBLOC ™ is the system that we consider the slowest and the least reliable because it is based on the theoretical position of the block in X, Y, Z and not on the interlocking, which is the opposite to placing rules, which favor interlocking without tolerance limits with respect to the target. On the other hand the system shows a virtual image to the operator which is often different from the reality, due to the imprecision of the system.

 

The software uses colors to indicate to the operator whether the block is on target or not. The operator is trained to pose according to the right interlocking and not according to the target. It will therefore rely on the contacts shown by the software, while trying to respect the colors. Unfortunately, the imprecision of the system does not allow us to have a reliable representation of reality:

 

posibloc POSIBLOC placing tools

 

 

 

The blocks are in contact on the image provided by the software, they are not in reality.

 

posibloc POSIBLOC placing tools

 

Conversely here the blocks are not in contact on the image and are in reality.

 

 

 

POSIBLOC ™ link

 

 

 

 

 

 

3 THE ECOSCOPE ® is an acoustic system which increases the rate of installation in dirty water but cannot be dispensed with a check by diver, because once the block is installed, the image does not allow to appreciate the quality of the contacts with the ACCROPODE ™ of the lower row, nor the interlocking and installation defects.

ecoscope echoscope ACCROPODE ™ II ACCROPODE ™ CORELOC ™  Xbloc ®

 

The ECOSCOPE ® may also show holes and interlocking defects that do not exist. This is due to the artifacts that can often appear with acoustic tools like ECOSCOPE ® or multibeam sonar.

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

ECOSCOPE ® link

 

- Quality and frequency of installation checks: The longer we delay the frequency of checks, the more we are exposed to major dismantling which will seriously penalize production. There is no point in affording the means to install 10 ACCROPODE ™ per hour if you have to dismantle 50% at the end of the day.

More than the hourly pace of installation, it is the frequency and quality of checks that will allow production targets to be achieved. Very close checks, by divers, will make it possible to eliminate dismantling by limiting the treatment of installation faults to real-time adjustments.

On the contrary, a multibeam sonar check after the installation of several rows, will not make it possible to see all the installation faults and will require significant dismantling in the event of an additional check by divers. In the event that only the multibeam is used, the quality of the construction cannot be certified in CLASS A. The durability of the structure cannot be guaranteed.

The average production in cable crane placing with CLAS trained divers is 6 to 8 ACCROPODE ™ per hour, approved.

 

The average hydraulic excavator production with CLAS trained divers is 12 to 15 ACCROPODE ™ per hour, approved.

 

 

These statistics from site data include one-off dismantling.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUR EXPERIENCE WITH THE ACCROPODE ™ BLOCK

 

 

2000 PORT D’ARGELES FRANCE

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block   expertise assessment

 

350 ACCROPODE ™ of 6 m3.

930 ACCROPODE ™ of 4m3.

 

 

The ACCROPODE ™ armour began to deteriorate before the work was accepted.

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block   expertise assessment

 

Eric SKIERNIEWSKI intervened as a legal expert appointed by the Administrative Court of Montpellier with the following mission:

 

Establish the cause of the disorders.

Establish the cost of repairs.

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block   expertise assessment

 

The expertise made it possible to determine the causes of the incident and assess the cost of repairs.

 

ARGELES reference link

 

 

 

 

 

2003 BREAKWATER ZIFMAR SETE FRANCE

 

2,200 ACCROPODE ™ of 4 m3ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block   expertise assessment

 

The ZIFMAR dyke in Sète suffered major damage before the final acceptance of the structure. 

 

Eric SKIERNIEWSKI intervened as a legal expert appointed by the Administrative Court of   Montpellier with the following mission:

 

Establish the cause of the disorders.

Establish the cost of repairs.

 

 

 

 

 

The expertise made it possible to determine the causes of the incident and assess the cost of repairs.

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block   expertise assessment  ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block   expertise assessment  ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block   expertise assessment

 

ZIFMAR reference link

 

 

2007 DUNG QUAT VIETNAM

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

5,500 ACCROPODE ™ of 2 m3.

3,900 ACCROPODE ™ of 4 m3.

6,200 ACCROPODE ™ of 6.3 m3.

4,700 ACCROPODE ™ of 9 m3.

1000 ACCROPODE ™ of 12 m3.

The company VAN OORD was behind on this project and exposed itself to penalties.

VAN OORD called on IDMER, now CLAS, to achieve the quality and production objectives.

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

IDMer acted as an independent consultant with the following mission:

Train and supervise the ACCROPODE ™ placing teams.

Train the site supervision.

Train all staff in ACCROPODE ™ specific security.

Interface with SOGREAH and the client representative.

Optimize production.

Optimize quality.

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

 

VAN OORD'S COMMENT AT THE END OF THE SITE

 

 

Reference link DUNG QUAT

 

 

 

2009 RAS LAFFAN QATAR

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

The companies RLNBC and CFE QATAR saw the installation of ACCROPODE ™ refused. RLNBC had chosen to use the ECHOSCOPE and CFE QATAR used the POSIBLOC ™.

RLNBC called on IDMer, now CLAS, to assist.

18,000 ACCROPODE ™ of 3 m3.

16,500 ACCROPODE ™ of 4 m3.

1,500 ACCROPODE ™ of 5 m3.

 

IDMer acted as an independent consultant with the following mission:

Train the placing teams.

Achieve quality and production objectives by associating ECHOSCOPE and divers. RAS LAFFAN is the first project on which the ECHOSCOPE was used to install ACCROPODE ™.

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

We have trained the placing teams in the simultaneous use of divers and ECHOSCOPE.

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

RLNBC COMMENTS AT THE END OF THE SITE

 

RAS LAFFAN RLNBC reference link

 

 

 

 

CFE QATAR seeing the progress made at RLNBC also called on IDMer, now CLAS. We tried to use the POSIBLOC ™ system but we failed meseabily, it did not give the expected results and was abandoned by CFE. We trained and supervised teams of divers.

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

5,300 ACCROPODE ™ of 3 m3.

30,000 ACCROPODE ™ of 4 m3.

3.100 ACCROPODE ™ OF 5 m3.

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

COMMENTS BY CFE QATAR AT THE END OF THE SITE

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

 

 

RAS LAFFAN CFE reference link

 

 

 

 

2010 KHALIFA PORT ABU DHABI

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

220,000 ACCROPODE ™ from 0.8 to 2 m3.

 

The Archirodon company saw the installation of ACCROPODE ™ refused. ARCHIRODON engineers attempted to use the POSIBLOC ™ system which did not perform as expected and was discontinued.

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

Archirodon was facing late penalties and called on IDMer, now CLAS, to assist him.

 

 

IDMer acted as an independent consultant with the following mission:

 

Train the installation teams.

Achieve quality and production goals.

Establish and achieve quality certification.

 

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

The operation was a resounding success for ARCHIRODON

 

 

KHALIFA reference link

 

 

 

 

2012 MARINA LIMASSOL CYPRUS

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

10,400 ACCROPODE ™ from 2 to 5 m3.

 

 

IDMer, which became CLAS, was hired as a SOGREAH agent for a monitoring mission during the work.

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

Visit of the project, inspection of the ACCROPODE ™ installed.

Training of the installation team.

Report for the attention of SOGREAH.

 

LIMASSOL reference link

 

 

 

2014 ZIRKU ISLAND ABU DHABI

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

2850 ACCROPODE™ of 1.5 m3.

5032 ACCROPODE™ of 2.2 m3.

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

The ARCHIRODON company was to build the breakwater of the new port on the island of ZIRKU. The ADMA-OPCO client demanded quality certification and ARCHIRON was falling behind on this site. ARCHIRODON called on CLAS to assist him.

Train the installation teams.

Implement certification procedures.

Achieve quality and production goals.

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

 

ARCHIRODON'S COMMENT AT THE EXIT OF THE SITE

ACCROPODE™ , accropode,  ACCROPODE™II, le bloc ACCROPODE™ , ACCROPODE™ block

ZIRKU reference link for construction

ZIRKU reference link for certification

 

2017-2020 EASTERN MARINA BEIRUT

 

ACCROPODE™II ACCROPODE™ expertise certification construction

2457 ACCROPODE ™ of 12 m3.

 

 

SOLIDERE was to build the NEW MARINA in BEIRUT. SOLIDERE entrusted the design work to DAR and the construction work to ARACO. SOLIDERE has awarded CLAS a contract to supervise all the work and a quality certification.

ACCROPODE™II ACCROPODE™ expertise certification construction

 

MISSION:

 

Implement certification procedures.

 

Achieve quality and production goals.

 

 

 

The ACCROPODE ™ armor were subjected to storm Loulou which caused a swell close to the design swell and the explosion of the port of Beirut which caused a sysmic effect.

ACCROPODE™II ACCROPODE™ expertise certification construction

 

The joint appraisal carried out after this explosion confirmed that there was no effect on the structures.

 

No ACCROPODE ™ broken, disconnected or taken out of place.

 

ACCROPODE™II ACCROPODE™ expertise certification construction

The works have been certified "CLASS A".

 

 

 

SOLIDERE'S COMMENT:

 

ACCROPODE™II ACCROPODE™ expertise certification construction

 

 

EASTERN MARINA reference link

 

 

 

 

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