THE MAYOR OF MADRID VISITS THE WORKS OF IMPROVING DRAINAGE NETWORK OF BASIN ABROÑIGALES, DUPLICATION ABROÑIGAL COLLECTOR AND ACTIONS IN MORATALAZ AND PILILLAS BRANCHES.

Madrid. June 4, 2012. The Mayor of Madrid has visited the works to improve the capacity of the sewage basin Abroñigales. The works include duplication Abroñigal collector and branches of Pilillas and Moratalaz, discharging it. These works will solve the capacity problems that were being detected when, occasionally heavy showers occurred. GINPROSA is doing the monitoring of these works for City Council Madrid.

The project was also drafted by GINPROSA for Dragados Company, and it incorporates all the actions of the collectors mentioned, under the assumptions of full hydrological study Abroñigales Basin to the Madrid City Council previously made it. Dragados is awarded the contract to design and build to the Project.

Designed works include:

Duplication of Collector B Abroñigal.

Duplication Abroñigal Collector B is a collector that runs parallel to the M-30 and the old collector B, from Dr. Garcia Tapia Avenue to the Bridge of the Three Eyes and it has a total length of 2,561 m.

TBM Tunnel executed.

The total length of duplication built by TBM excavation is 2,398.86 m. The outside diameter of excavation of the tunnel is 3.95 m and the lining up of rings of prefabricated concrete segments of 1.20 m length and 0.20 m thick.

Well Entering the TBM.

For tunneling with TBM has been necessary to build a Well for entering the tunnel boring machine, which it has dimensions of 83 m long, 15 m wide and 16 m depth.

Well Entering the TBM.

For tunneling with TBM has been necessary to build a Well for entering the tunnel boring machine, which it has dimensions of 83 m long, 15 m wide and 16 m depth.

Tunnel connection with Abroñigales bypass

The first 79 m initial duplication collector B, which connect the Well Entering the TBM with the casket of Abroñigales By Pass have been built using conventional tunneling method Belgium.

Connection with the old collector

The connection between the old collector B and collector B Duplicate built with TBM is designed to drain up to 19 m3 / s flow to the new sewer tunnel and avoid suffering the old collector load. This is a very innovative solution in design and construction. The connection is a circular enclosure of 35 m and 12.40 m internal diameter, which it works as well collector ridge between the old and the new collector.

Manholes of Duplication Collector B

 The Project has eight manholes in the new B collector. Four manholes was excavated with manual systems and the another four was drilling with special excavation machine.

New Pilillas Collector

The new Pilillas Collector has 400 m long. His internal section is vaulted with dimensions 1.50 x 2.25 m. It was built by sections with traditional tunneling systems.

New Moratalaz Collector

The new Moratalaz Collector has 662 m long. His section is also vaulted with dimensions 1.25 x 1.80 m. The first 140 m long was excavated with cut & cover method, and the 522 m remaining was built by sections with traditional tunneling systems.