IFront cover C1.1ternative 24/3/03 12: 15 pm Page 1 ~ Mefrosur Second Edition www.comadrid.es Commuting in the 21 st Century • a tunnelbuilder reference edition • lAd page back of map 24/3/03 12:17 pm Page 1 PROJECT METRO SUR MADRID • t High Pressure for the Metro Sur. + Madrid is extending its underground railway system. A Herrenknecht EPB machine (0 9.33m) was + advancing a 6.45km long tunnel in soil with a high plaster content, as well as clay and siltstone. In order to master the compact geological conditions optimally, the EPB-Shield has been equiped with special performance features. 12 high pressure nOlzles on the cutting wheel inject water at 300bar into the tunnel face. Torque of 20,236kNm provides the power to effectively excavate the soil. Best weekly performances of up to 187.5m are evidence of the efficiency of this design. In this project Herrenknecht had a total of three machines in deployment. Herrc:nkm~C'ht. Drilling for progress. • ~,nccbu: EPS-glleld. 0 9.33m ClIttemuc" !lOwer 2,SOOkW Tunnellugtn: 6,.84Om Gcolo9lC'll1 cond,noll'l: crystJlh~.:l ~luter WItt! day i1nd SlIUUlne CuttemCi!d WItt! ,nsuliN pc.rformil~ce Gf 2,800kW Her~nknechl AG 1)..17963 Schwana~ Tel ..49 782c 302 0 Fa. ..49 78243403 Hcrrcnknecht Iberita SA E-28046 Mildtid Tel .34 91 3452 697 Fax .34 91 3592 032 Hcrrenknecht SChWC;1 AG CH-6474 Amsleg Tel .. 41 <11 8848060 Fax .. <1\ <11 8848089 Herrenknecht Nederland 8V Nl·3432 GL N,e~wege," Tel .. 3\ 306000333 Fa.: -031 306000955 www.herrenknecht.com IpOl Contents 24/3/03 12:16 pm Page 1 Contents ******* 2 Introduction and overview of the extension and enlargement of Madrid Metro by Dr Manuel Melis Maynar, President of Metro Madrid, CEO of Mintra, and Director General of Transportation Infrastructure at Comunidad de Madrid. Metrosur Construction Progress 7 From Legan"s to Alcorcan and Mastoles, Contract 1 ACS Vias 15 Tunnelling Beneath Urban Mastoles, Contract 2 FCC 23 Loranca to Fuenlabrada in Cut and Cover, Contract 3 Sacyr & OHL • 33 Mining Beneath Fuenlabrada to Getafe Conservatorio, Contract 4 Necso 39 Tunnelling Beneath Getafe Town, Contract 5 Ferrovial Agraman 45 Serving the Town of Legan"s, Contract 6 Dragados Line 10 Extension and Enlargement 53 Preserving Casa de Campo Park, Ferrovial Agroman & FCC 57 From Colonia Jardin to Cuatro Vientos, FCC + 61 Cuatro Vientos Depot and Access, Sacyr Corson-Corviam • 65 From Cuatro Vientos to Alcorcan, Dragados Line 8 Extension 72 Mar de Cristal to Nuevos Ministerios, Neeso ACS Ferrovial Agroman RENFE Connection to San Martin 77 On the Expansion Theme, Neeso & Saeyr wnoelbuilder gtilteNlly acXnowIedges the contributions to thi1 edition Designed and typeset by Dorchester Typesetting Group ltd rnadf' b)' 01" Manuet Melis Maynu of Metto tvUdrid., and nis; 0Ud Printed by The Friary Press, Dorchester, Dorset OTl 11L. UK Engine«s Manuel Amai%,. Jesus Tr~da. and 11d~(onso de Matiu. Patticulaf ttwlks Me due to Pc'blo FaTer of Incoydesa fO( col\.atlng the rmterial from the design, constr\Jetion <lnd consulting engineers.. wt\ose: collective ~e has been invaluable. Copies of all reference editions are available for Published by wnnelbuilder in conjunction with Comunidad ~ M~. multi-channel delivery from the Resources section at wVl/w.tunnelbuilder.com Editon Mike Smith &; Mauri<:e IonoeS. e-milI pubica~r'lelbuiIder.com Reproduction of individual articles only by agreement with wnneJbuildeT ltd. CNnuy Lodge, loddiswell, Devon TQ7 4EH. UK. the publisher. Copyright () tunnelbuilder ltd 2003. tel ..44 (0)1 S48 550123. METROSUR2 1 I • • IpP2-6 Introduction 24/3/03 12:19 pm Page 2 I INTROOUCTION Introduction Madrid Metro and Railway Infrastructure 1995-2003 • LEGEND The Madrid Metro Extension designed and built during the period 1995-99 comprised a total of S6 km of new railway lines, of which 38 km were in tuood. together with 37 new stations and 4 interchange stations with the commuter train system. The project started in August. 1995 and was com· pleted in March, 1999 at an overall cost of €28.2 million/km. The unit final cart of the 38 km-Iong under­ ground section was €41.3 million/km. which included the new rolling stock. The correct application of soil mechanics was the most important element of the project. and the best geotechnical expertise in the country was retained and employed. No financial restriction was imposed on soil investigation, monitoring and Balance of Costs Extensions to Madrid Metro t ground treatment. 1995-2003. The 1999-2003 metro extensions Some tunnelling experts were advising in described in this edition involved a 1995/1996 that open face methods such total 1S km of railway lines, with 58 as NATM, SCL or Precutting were both + km in tunnel, and 39 stations. Once faster and cheaper than small section + again, they have been built within the methods, such as the traditional Madrid allotted time span, without compro­ Method. Even contractors were not recom­ mise on safety or dramatic cost mending the use of TBMs, maintaining increase. that methods such as NATM were cheaper and faster than EPB machines for tunnel Metres Built by EPB Machines 1999-2003 Stations M Start End Days Metres M/day Rings Crossed Total M/month HK Paloma, line 8 Airport 04-sep-OO 24-jun-01 293 3,357 11.5 2,238 3,357 355 HK Paloma, Fuenlabrada 19-sep-01 03-apr-02 197 2,840 14.4 1,893 3 2,841 447 HK Almudena, A1corc6n 26-«<-00 19.feb-02 481 7,439 15.5 4,959 5 7,440 479 HK Mares del Sur, Getafe 21-oct-OO 02-mar-02 499 6,467 13.0 4,311 6 6,467 402 NFM Chata, leganes 06-oct-OO 21-sep-01 350 6,282 17.9 4,188 6 6,282 556 NFM Adelantada, Unea 10 02-nov-OO 23-mar-01 141 2,760 19.6 1,840 2,760 607 NFM Adelantada, M6stoles 05-jun"()1 10-dec-01 188 3,963 21.1 2,642 4 3,963 653 lovat. Cuatro Vientos 20-oct-OO 26·nov..()1 402 6,089 15.1 5,074 6,089 470 • Total metres tunnel EPB 39,195 39,198 Starting date 04-sep-OO End date 03-apr-02 Working days 576 Metres built 39,T95 M/day, global 68 M/month, global 2,109 I 2 METROSUR2 • 24/3/03 12:19 pili INTRODUCTION I construction. This was because of tong delivery times on this specialist equipment, METROSUR TBM ADVANCES and problems at the time with TBM pro­ jects such as Storebaelt in Denmark, and METRES CONSTRUCTED (39,198) Pinglin in Taiwan. ',,," ~ It was clear that they were not prepared '.m to invest the necessary capital in T8Ms. if it '," could be avoided. For the Client, it was .,~ clear from the beginning that, jf a collapse were to occur using a supposedly faster ."".m and cheaper method, more than 4 or 5 ... months might be lost. resulting in huge .,~ economical and political penalties. The cost ,.. of recovering the collapse would, no ,m doubt, exceed the additional costs of the ... ,,~ .supposedly more expensive method, a5 -' , had occurred at the Heathrow Express pro­ w .. Z ,m ject. It was also thought that the recovery Z ::> ,.. time might well match the delivery time of ... ,,~ the EPB machines. ... 0 .." II) ,m Construction Priorities w ,.. I. -~ I,...., ...'"w .'~ The priorities applied to the construction ... , --' J methods were: maximum safety for the " .m workers inside the tunnel; maximum safety ... '" for the buildings and other surface ,,~ structures above the tunnel; minimum ".. exposure of open faces, at every stage of •.m J, '" tunnel construction; and no cost or timing ".. factors to take precedence over tunnel safety and quality. Other matters decided at the start of the project were as follows: No tunnelling project, including this 38 km soft ground tunnelling construction, CALENDAR DAYS should be contracted under a fixed lump + WlIIl;lIA.TA UGo\NU ~ IIWt£I SUR GETAfE sum contract. It was, and stilt is, the author's - ~AI..JIIU(I(H,l,IJ.COACOIl _ HFIllAO(IJoo'lTA04UlUolO opinion that it is scientifically impossible for _fllCl'AI.,*",FU~ any Client to provide complete geotechnical information. Even with the use of a pilot an evaluation of the technical merits of the Metres built by EPB machines tunnel. geotechnical conditions can vary so proposals, and of staff considerations. 1999·2003. substantially as to make the contract invalid and useless, as has occurred elsewhere. If Disputes Avoidance any problem does appear, litigation or arbi· tration is likely, and a huge amount of time A system was needed to enable the Client and money can be wasted in this process. to: foresee problems during tunnelling activo According to Spanish law, it was decided ities; make a timely study of the most appro· that the contracts would be fixed price, but priate solution; and agree the solution with a bill of quantities, so that any addi· economically with the contractor con· tional work could be easily priced, and cerned. The objective was to avoid disputes, agreed promptly with the contractors. and to always reach agreements before the The selection of the contractors was problems become unmanageable. undertaken with the greatest care, and No large firm of consulting engineers included consideration of the soft ground was hired as general project managers. It is tunnelling experience of the engineers and the author's opinion that experience in technicians proposed for the works. Of other cities and countries has shown that especial importance was the selection of such an approach does not actually pro· the person to be in charge of tunnel con· duce savings in time and cost.