Diamond Award 2018

DENTELLADA, S.L.U.
Lugar Tombelo – 19 A
36990 Noalla – Sanxenxo- España
T. +34 986 735 031
F. +34 986 735 902
www.dentellada.com info@dentellada.com
info@dentellada.com

Dentellada specialises in technical demolition.
We started our activities in 1992 with a small team of qualified professionals. We are currently able to carry out any demolition project offering the best solution to be executed in the building site.
We have an on-going commitment with i+d+i. Being convinced of the importance of innovation, dentellada investigates and develops the solutions which best fit our clients, both technically and economically, effectively managing our best asset: knowledge.

The staff of Dentellada is the support of a great organisation. Aware of this fact, the company follows a policy of quantitative and qualitative growth, with continuous training programmes, on-going recruitment of new employees and rotation of work places within the structure of the group, which enables the staff to acquire experience in the different areas of the company.

Representative of the company:
Traveling Companion:
Departure Airport:

HIGH SPEED TRAIN LINE (AVE)
MADRID-CASTILLA LA MANCHA-COMUNIDAD VALENCIANA-REGION DE MURCIA SUBSECTION CONTRERAS RESERVOIR-VILLARGORDO DEL CABRIEL
CONTRERAS VIADUCT PROJECT DEVELOPER: ADIF
PROJECT BUILDER: U.T.E. EMBALSE DE CONTRERAS (AZVI-SAN JOSE)
TOTAL BUDGET: 12.410.000.000 €
TOTAL LENGTH: 914 km
TRAIN SPEED: 350 km/h

CONTRERAS VIADUCT

The bridge is located in the Contreras Reservoir – Villargordo del Cabriel Segment of the New Rail Access to Levante. It has designed a solution with upper panel over arch bridge. The distance between arc supports is 261 m (European record in this kind of bridges) and distribution of the distance between top panel supports is 32,625 + 12 x 43.50 + 32,625 meters (Total length: 587,25 m).

AUTO CRANE

In the first moment we decided to contact with a crane company, in order to know the maximun weight they could lift. One visit to the work place was enough to know it.
In Valencia side, the distance between the column and the auto crane was 36,5 meters. With a 300 tons auto crane, they could lift blocks with a weight of 16,1 tons.
In Cuenca side, the distance between the column and the auto crane was 24,2 meters. With a 300 tons auto crane, they could lift blocks with a weight of 28,2 tons.

DATES
BEGINNING: APRIL, 20TH 2009
FINISH: AGOST, 26TH 2009
DURATION: 4 MONTHS

FIGURES
DENTELLADA’ STAFF: 10 officials + 1 supervisor
TOTAL WEIGHT TO MOVE: 2.750 t /6.062.744 lb
TOTAL DRILL LENGTH: 303 m / 993 ft
TOTAL CUTTING AREA: 970 m2 / 10.441 ft2

WE USED…
DIAMOND THREAD: 700 m / 2.297 ft
DIAMOND THREAD UNIONS: 830 units
ANCHORS: 1.250 units
CORE DRILLS: 80 units (Ø18-28-50-80-120-130-250 mm)
WIDIA DRILL BITS: 18 units (Ø15-16-18-28 mm)
DIAMOND CUTTING DISC: 1 unit (Ø800 mm)

PLANNING
From the beginning there were interesting aspects to solve.
Probably the first thing we did was contact with the crane company to see how much weight they could lift, taking into account the distance, in order to make the most economical cutting. In the pieces that were under water, Archimedes helped us to make the pieces a little larger and thus lower costs.
Then, it was necessary to build a structure that serve as a platform for operators working. This one ought also to move vertically across the height of the column. We have used four winches located at each corner of the structure.
We also knew that we would need another structure. The purpose of this one would be to allow lateral displacement of the upper blocks, so that they could be lifted by the auto crane. To perform this operation just described, we used two additional devices, a hydraulic jack for elevate the blocks and a tractel to move them horizontally, over a rollers, in order to decrease the frictional forces.
The handicap of to cut under water was a fact. It was necessary to hire an underwater work company.

EXECUTION
…and when you think that everything is OK, Murphy’s laws appear!
When we began to move the blocks, we realized that the space was not enough to catch them with the auto crane, so to manufacture a special smaller hook has been necessary.
In the first column, when trying to remove the formwork from the top, we saw that it was impossible because it was embedded in concrete. The solution was to upload a demolition robot (BROKK 180) equipped with hammer.

PLANNING
From the beginning there were interesting aspects to solve.
Probably the first thing we did was contact with the crane company to see how much weight they could lift, taking into account the distance, in order to make the most economical cutting. In the pieces that were under water, Archimedes helped us to make the pieces a little larger and thus lower costs.
Then, it was necessary to build a structure that serve as a platform for operators working. This one ought also to move vertically across the height of the column. We have used four winches located at each corner of the structure.
We also knew that we would need another structure. The purpose of this one would be to allow lateral displacement of the upper blocks, so that they could be lifted by the auto crane. To perform this operation just described, we used two additional devices, a hydraulic jack for elevate the blocks and a tractel to move them horizontally, over a rollers, in order to decrease the frictional forces.
The handicap of to cut under water was a fact. It was necessary to hire an underwater work company.

EXECUTION
…and when you think that everything is OK, Murphy’s laws appear!
When we began to move the blocks, we realized that the space was not enough to catch them with the auto crane, so to manufacture a special smaller hook has been necessary.
In the first column, when trying to remove the formwork from the top, we saw that it was impossible because it was embedded in concrete. The solution was to upload a demolition robot (BROKK 180) equipped with hammer.

DENTELLADA completed this project in the established time without any safety issues or accidents.
In our organization, Since our start, concern for people is part of our production process as we demand the highest quality in our business.Thus, we apply the quality policy, prevention and environment for all our achievements. This commitment is embodied in our management system based on ISO 9001 and in our commitment to sustainable development ISO 14001.