Header of the content extension Line 2 to Las Rosas

Extension of Line 2 to Las Rosas

Here you will find information, graphic documentation, photographs, etc. of this work.

Commissioning: March 16, 2011

This action supposes the extension of Line 2, from Ventas, to increase the possibilities of public transport of La Elipa. The neighborhood of La Elipa, wedged between the M-30, the M-40 and the A-2 and R3 motorways, will thus have a mobility alternative.

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Technical data

Total length of the section 4.580,52m
Number of stations

4

Stations and tunnels between screens      731,15m
Belgian Method Tunnel

31,84m

Tunnel with EPB TBM       3.818m
concrete volume 111.193m3
excavation volume

449.362m3

Maple

         25.687.255 Kg

continuous screens

  62.487m2

 

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Madrid Traditional Method Tunnel

 

It was used, in an intermediate section of the tunnel between screens, to pass under a high-voltage electrical conduit with a length of 25 m and also a small section for the junction of the extraction shaft of the tunnel boring machine with the old Line 2.

In addition to the 25 m previously defined, small connection sections were also built between the Elipa sack bottom and the west end wall of the exit shaft and in the galleries that join the different auxiliary shafts with the tunnel.

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Tunnel with EPB tunnel boring machine

 

The line tunnel has been built starting from the Las Rosas Station, where the tunnel boring machine was assembled, with the facilities shaft located 300 m from the station. The tunnel boring machine used was the EPB (Earth Pressure Shield) type, as this is the most suitable for excavation in the soil of Madrid. 

This type of machine allows the excavation of the land, supporting the excavation front with the excavated rubble and subjected to pressure inside the rubble chamber, by regulating the extraction of material by means of an endless screw and the pressure of the thrust jacks. The excavated lands have been the typical soils of Madrid, with a predominance of coarse.

The tunnel boring machine used to drill the 3800 m of tunnel has been the well-known NFM Technologies ADVANCED machine with an excavation diameter of 9,40 m, which, since 1995, has drilled more than 17 km in the tunnels of several transmission lines. Metro, with excellent results.

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Prior to the execution of the tunnel, a revision and repair of the machine components was carried out, among them the change of the system for extracting debris from wagons to a continuous belt (designed for this work) and the modification of the cockpit, including the operating system and the graphical outputs of the tunnel boring machine parameters. All this has contributed to breaking previous records for this machine, especially with the use of the belt.

Weekly yields of up to 286,5 m were achieved, with the maximum production in one day of 43 rings, the current record for tunnel boring in Metro de Madrid. The utilization coefficient (production time/total time) of the machine at origin was 49%, with a maximum of 66% in the month of April 2010, when the figure of 1.101 m drilled was reached, an execution record. monthly.

On the other hand, continuing with the line of improvement and renovation of the Madrid Metro works, a hydrophilic joint has been incorporated in this work (in addition to the joint that the voussoirs already have), which reinforces the sealing of the executed tunnel and minimizes the effect of the tunnel on the surrounding hydrogeology. 

Also along the same lines, bicones have been used in the assembly of voussoirs and the voussoirs have metallic fibers to improve the final quality of the cladding.

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La Almudena Station text

La Almudena Station

 

Located next to the Almudena cemetery. The geometry of the station and its location have been conditioned by the needs of the layout and its implementation on the surface, to respect and protect a set of trees with special ecological value. For this reason the station has been built narrower than usual. The peculiarity of this station is that the escalators are longitudinally aligned with the fixed ones, so as not to increase the width of the floor.

The hall is long and narrow, with two lateral openings in the slab that communicate with the platforms. In the background you can see the great central void, only interrupted by two large stampers (horizontal tying beams). And on both sides of it, the escalators.

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Station Alsace text

Alsace Station

 

The design of the station has been determined by the surface implantation of the accesses and their connection with the bus interchange located in the central space of the Plaza de Alsacia, as well as by the needs of the route of the line.

This station is prepared to accommodate a new metro line that runs orthogonally and with interchange at this point.

It is a simple station with two levels. The balustrade of the hall looks out onto the central void of the station, from where the platforms and the tracks on the lower level can be seen. An enormous mural, the work of the artist Rafael Gordillo, closes the space in an enveloping way. 

The communication between the lobby and the platforms is produced by a group of two escalators and one fixed, as well as by an elevator on each platform, facilitating access for people with reduced mobility.

On one of the platforms, the forecast has been left for a set of connecting stairs with a future Metro line, which would intersect with the current one at a lower level.

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Guadalajara avenue text

Guadalajara Avenue

 

Located on the avenue from which it takes its name, it is a simple station with two levels, whose geometry, similar to the previous one, has only had to be adapted to the characteristics of the layout and its implementation on the surface.

Outside, two pavilions accommodate, one the fixed and mechanical stairs, and the other the elevator that leads to the lobby level.

As in all the stations of the current model, the rooms for the Metro staff and the passenger service points are located in the lobby. At platform level, the widest part of the station houses the groups of stairs and the technical rooms and at the end of the narrow part, in the area farthest from the lobby, are the emergency exits of each platform.

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Station Las Rosas text

The Roses Station

 

It is located on the Geneva promenade, in a large open space on which a new park has been built.

The route of the line tunnel passes under the M-40 ring road, in the section between the station and the parking depot where it ends. This circumstance determines its depth, together with the fact that the structural box of the station was used as an entrance shaft for the tunnel boring machine.

It is a more complex station than the previous ones, since it is the head of the line and houses an electrical substation. Its geometric organization is slightly special, with a single access centered on the axis of the station. This access is formed by two groups of stairs and an intermediate landing from which access is given to a set of technical rooms.

The entrance to the hall from the entrance is located in the wide area of ​​the station centered on the floor. Inside this area are the lobby and the central empty space. Next to the lobby are the rooms for Metro staff and on the other side of the void are the station's ventilation rooms.

To make the central space more diaphanous, the piles that are located next to the escalators have been left free in their entire height.

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  • Workshop area: With two warehouses, one for the workshop with a gantry crane and the necessary machinery for on-site repair of the tunnel boring machine equipment and another for a warehouse where all the supplies for the execution of the tunnel are managed.

  • Pumping and settling areas: With a water tank to ensure supply during tunnel construction and a second concreted pit for wastewater treatment.

Extraction well of the tunnel boring machine text

Extraction shaft of the tunnel boring machine

 

The shaft that will serve disassembly and extraction of all the elements that make up the tunnel boring machine (cutting wheel, shield, cars, etc.).

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ventilation shafts text

ventilation shafts

 

Along the route of the extension of Line 2 of the Madrid Metro to Las Rosas, four ventilation shafts have been designed. They are located at the following kilometer points: 0+279,26, 2+890,42, 1+287,41 and 3+903,73

In order to speed up the execution of the work, avoid surface conditions as much as possible and meet the needs of Metro de Madrid, modifications have been made to the location, design and structural typology of the ventilation shafts.

These wells have been built using descending concrete rings 2,30 m high, open throughout their development, until reaching the bottom of the well. For the union with the line tunnel, a gallery is built in the mine by the Traditional Method of Madrid.

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emergency exit text

Emergency exit

 

In addition to the existing ones in each of the stations, an emergency tunnel exit has been designed, located between the La Almudena and Avenida de Guadalajara stations. It is located at Pk1+785,14

It is built by means of descending concrete rings, connecting with the line tunnel through a gallery executed in the mine, by the so-called Madrid Method.

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Las Rosas Parking

Las Rosas Parking

 

The train parking necessary for the expansion of the Line 2 infrastructure consisted of the construction of an enclosure 156 m long and with a variable width between 12 and 18 m, in such a way that it accommodates four tracks, designed to house 8 4-car Series 3000 trains, each 60 m long.

Two different methods were used for the construction: open-cast walls and beam slab, in the area coinciding with the TBM supply shaft and screens and slab in situ in the natural terrain area.

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Garages Sales

Garages Sales

 

The remodeling involved the complete dismantling of the 92x40 m warehouse that housed 10 tracks, all of them with rails embedded in a concrete pit without buffers.

The metal truss structure of the warehouse and interior rooms was at the end of its useful life, so the construction of a new warehouse with an aluminum structure covered with a double pressurized canvas, with a lateral enclosure of prefabricated panels and a new interior outbuilding.

It is worth highlighting the remodeling of the connection of the rail yard with the maneuvering tunnel and rehabilitation with the necessary actions and connection with the new escape route.

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Garages Canillejas text

Canillejas Garages

 

The action in the existing parking facilities in Canillejas has consisted of the construction of a new walkway located between tracks 14 and 15, as well as refurbishment between tracks 13 and 16.

The new walkway is built using a metal structure made up of metal pillars, and includes the installation of platform protection, protection doors with security locks, a door protection kit and a control panel for access to the car roof, with new installations for lighting and compressed air.

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Gallery

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The fully accessible buttons, with a high color contrast between the characters and the background, and the simultaneous transmission of information to users in sound and visual form inside the lifts are measures that benefit large groups of the population, and not only for people with hearing or visual disabilities.

There are other novelties that have been added to the usual accessibility measures in previously built stations, such as the implementation of assisted rescue areas next to the emergency stairs, the installation of guide pavements for people with visual disabilities, the new ischial supports that they have a more ergonomic design, the adaptation of passenger service stations so that users with wheelchairs can be properly attended to, etc.

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The artist, in full “informalist” maturity, has cut up the available space, surrounded the volume until he has dominated it and has turned the station into a gigantic work of art for all Metro users.

The traveler's reaction is intense when he first enters the station and discovers that explosion of color and movement. Going down and up the escalators have become a spectacle. The contemplation of the mural from the platforms turns waiting times into times of reflection.

It is an important work for Madrid, an approach to the work of an artist who is always close to the breath of society. Bringing art closer to people makes the experience of traveling by subway richer, less tedious.

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Alsace text

Alsacia

 

In Plaza de Alsacia, the old roundabout located at the intersection of Nicolás Salmerón, Avda. García Noblezas and Avda. Guadalajara streets, becomes a bus interchange. The station has two entrances, the first on Avenida de Guadalajara and the second inside the roundabout, to make interchange possible.

The fountain located in Plaza Alsacia has been restored by cleaning and treating its existing ornamental elements and new hydraulic and lighting installations.

The stair and elevator accesses to the Avda. Guadalajara station, within the existing green area between the Avenida de Guadalajara and the Avenida de Canillejas a Vicálvaro, cause the new green space redevelopment action.

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The action consists of planters delimited by knot fences, wooden fences, pododactile pavements alternated with urban furniture (chess tables, benches, litter bins, etc...), tree plantations and grass seeding.

The interchange is made up of six double bus docks for EMT lines, around a central island, where the access to the metro station is located. In this way, the exchange between means of transport is organized in a landscaped environment.

The docks were built with waterproofing concrete and have integrated canopies. All of them are connected to each other and to the accesses to the metro by means of guide pavements for the accessibility of people with visual disabilities, executed with pododactil tiles.

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redevelopment Avda, Guadalajara text

Avenida de Guadalajara

 

The location of the station's pedestrian accesses and lifts, within the existing green area between Avenida de Guadalajara and Avenida Canillejas a Vicálvaro, led to the new green space reconstruction action.

Planters delimited by knot fences, wooden fences and pododactyl pathways alternated with urban furniture (chess tables, benches, litter bins, etc.) and tree plantations, as well as grass seeding.

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Las rosas

 

Lastly, the Las Rosas station is located in an existing park between Sweden Street and Guadalajara Avenue, which has been completely redeveloped, modernizing and fully adapting its irrigation, lighting and sanitation facilities to the new needs.

This extensive garden area has been equipped with new areas such as the children's play area and the rehabilitation area for the elderly, as well as modern urban furniture, such as benches, chess tables and a wooden pergola.

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