Diamond Award 2011

DENTELLADA, S.L.U. Lugar Tombelo – 19 A 36990 Noalla – Sanxenxo – Spain T. +34 986 735 031 F. +34 986 735 902 www.dentellada.com info@dentellada.com Dentellada is specialized in technical demolition.
We started our activities in 1992 with a small team of qualified professionals.
Nowadays we are able to carry out any demolition project offering the best solution to be executed on site.
We have a permanent commitment with r+d+i.
Convinced of the importance of innovation, dentellada researches and develops the solutions that best suit our customers, both technically and economically, effectively managing our best asset: knowledge.
dentellada’s staff is the support of a large organization.
Aware of this fact, the company follows a policy of quantitative and qualitative growth, with continuous training programs, permanent recruitment of new employees and job rotation within the group structure, allowing the staff to gain experience in the different areas of the company.
Company representative: Travel partner: Departure airport:

HIGH SPEED LINE (AVE) MADRID-CASTILLA LA MANCHA-COMUNIDAD VALENCIANA-REGIÓN DE MURCIA SUBSECTION RESERVOIR OF CONTRERAS-VILLARGORDO DEL CABRIEL VIADUCT OF CONTRERAS PROJECT PROMOTER: ADIF PROJECT CONSTRUCTOR: U.T.E. EMBALSE DE CONTRERAS (AZVI-SAN JOSÉ) TOTAL BUDGET 12,410,000,000 € TOTAL LENGTH: 914 km TRAIN SPEED: 350 km/h

CONTRERAS VIADUCT The bridge is located on the Contreras Reservoir – Villargordo del Cabriel section of the New Railway Access to Levante.
A solution has been designed with an upper deck on an arch bridge.
The distance between arch supports is 261 m (European record for this type of bridge) and the distribution of the distance between upper deck supports is 32.625 + 12 x 43.50 + 32.625 meters (total length: 587.25 m).

AUTO CRANE At first we decided to contact a crane company to find out the maximum weight they could lift.
A visit to the work site was enough to find out.
In Valencia, the distance between the column and the crane was 36.5 meters.
With a 300-ton crane, they could lift blocks weighing 16.1 tons.
On the Cuenca side, the distance between the column and the crane was 24.2 meters.
With a 300-ton crane, they could lift blocks weighing 28.2 tons.

START DATE:
APRIL 20, 2009 END:
AUGUST 26, 2009 DURATION:
4MONTHSPERSONNELFIGURES DENTELLADA
10 officers + 1 supervisor TOTAL WEIGHT TO BE DISPLACED:
2,750 t /6,062,744 lb TOTAL DRILLING LENGTH:
303 m / 993 ft TOTAL CUTTING SURFACE:
970 m2 / 10,441 ft2We USE…. DIAMOND WIRE:
700 m / 2,297 ft DIAMOND THREAD JOINTS:
830 units ANCHORS:
1,250 units CORE DRILLS:
80 units (Ø18-28-50-80-80-120-130-250 mm) WIDIA DRILLINGS:
18 units (Ø15-16-18-28 mm) DIAMOND CUTTING DISC: 1 unit (Ø800 mm)

PLANNING From the beginning there were interesting issues to resolve.
Probably the first thing we did was to contact the crane company to see how much weight they could lift, taking into account the distance, to make the cut more economical.
For the pieces that were underwater, Archimedes helped us to make the pieces a little bit bigger and thus lower costs.
Next, it was necessary to build a structure that would serve as a platform for the operators working.
This also had to move vertically because of the height of the column.
We used four winches located at each corner of the structure.
We also knew we would need another structure.
The purpose of this would be to allow the lateral displacement of the upper blocks, so that they could be lifted by the crane.
To perform this operation, we used two additional devices, a hydraulic jack to lift the blocks and a tractel to move them horizontally, on rollers, in order to reduce the frictional forces.
The disadvantage of cutting underwater was a fact.
It was necessary to hire a company for underwater work. EXECUTION…and just when you think everything is going well, Murphy’s laws appear! When we started to move the blocks, we realized that there was not enough space for the crane to pick them up, so it was necessary to make a special smaller hook.
In the first pillar, when we tried to remove the formwork from the top, we saw that it was impossible because it was embedded in concrete.
The solution was to bring up a demolition robot(BROKK 180) equipped with a hammer.

PLANNING From the beginning there were interesting issues to resolve.
Probably the first thing we did was to contact the crane company to see how much weight they could lift, taking into account the distance, to make the cut more economical.
For the pieces that were underwater, Archimedes helped us to make the pieces a little bit bigger and thus lower costs.
Next, it was necessary to build a structure that would serve as a platform for the operators working.
This also had to move vertically because of the height of the column.
We used four winches located at each corner of the structure.
We also knew we would need another structure.
The purpose of this would be to allow the lateral displacement of the upper blocks, so that they could be lifted by the crane.
To perform this operation, we used two additional devices, a hydraulic jack to lift the blocks and a tractel to move them horizontally, on rollers, in order to reduce the frictional forces.
The disadvantage of cutting underwater was a fact.
It was necessary to hire a company for underwater work. EXECUTION…and just when you think everything is going well, Murphy’s laws appear! When we started to move the blocks, we realized that there was not enough space for the crane to pick them up, so it was necessary to make a special smaller hook.
In the first pillar, when we tried to remove the formwork from the top, we saw that it was impossible because it was embedded in concrete.
The solution was to bring up a demolition robot(BROKK 180) equipped with a hammer.

DENTELLADA completed this project on time without any safety problems or accidents.
In our organization, since our beginnings, the concern for people is part of our production process, as we demand the highest quality in our activity, so we apply the policy of quality, prevention and environment in all our achievements.
This commitment is reflected in our management system based on ISO 9001 and in our commitment to sustainable development ISO 14001.