The 1,000 MW Hydro Power Station Masjed-e-Soleiman (formerly called Godar-e-Landar) in Iran is under construction since 1992. The rock engineering aspects of the major underground structure, i.e. the powerhouse cavern shall be reported on in detail. The geotechnical investigations are described and results given. The results of several geotechnical analyses are presented. The designed and executed rock support is given. A description of the monitoring systems and typical measurement results obtained during and after excavation are presented. The lessons learnt during construction of the Stage-I powerhouse cavern were applied on the extension of the powerhouse cavern, which is to house an additional 1000 MW. Details regarding the unexpected behaviour of the Mudstones are given.
Die 1000 MW Wasserkraftanlage Masjed-e-Soleiman (vormals Godar-e-Landar genannt) befindet sich seit 1992 in Bau. Dieser Artikel berichtet im Detail ueber die felsbaulichen Aspekte der Untertagebauwerke, insb. der Maschinenkaverne. Die geotechnischen Untersuchungen werden beschrieben und deren Ergebnisse wie die Ergebnisse verschiedener Berechnungen werden prasentiert. Die geplante und die ausgefuehrte Felssicherung wird angegeben. Die eingebauten Überwachungseinrichtungen werden beschrieben und typische Ergebnisse wahrend des Aushubs und danach werden dargestellt. Die Erfahrungen beim Aushub der Kaverne der Stufe I wurden beim Entwurf der Kaverne der Erweiterungsstufe II, die weitere 1000 MW beherbergen wird, beruecksichtigt. Details zum unerwarteten Verhalten des Schluff-/Tonsteins werden angegeben.
La centrale hydroelectrique de Masjed-e-Soleiman (denommee anciennement Godar-e-Landar), d'une puissance de 1.000 MW, est en construction depuis 1992. Un rapport detaille sera presente sur les aspects relatifs à la construction en enrochements de l'amenagement souterrain principal, à savoir la caverne abritant la salle des machines. Une description des investigations geotechniques realisees y est fournie ainsi que les resultats correspondants. En outre sont presentes les resultats de plusieurs analyses geotechniques. L'ancrage dans la roche tel que projete et realise est presente. Une description des systèmes de contrôle ainsi que les resultats de mesures typiques obtenus au cours des travaux d'excavation sont donnes. Les leçons tirees lors de la construction de la Phase 1 de la caverne de la salle des machines furent appliquees à l'extension de la caverne de la salle des machines, qui doit abriter une unite supplementaire d'une puissance de 1.000 MW. Par ailleurs, des details sont donnes sur le comportement inattendu des argilites.
The hydropower project Masjed-e-Soleiman owned by the Iran Water & Power Authority is situated on the Karun river and is under construction since 1994. The project is executed in two stages. Lahmeyer International was part of a Joint Venture during Tender Design and Construction supervision for Stage-I of the project. For the Extension of the project Lahmeyer took on the role of technical adviser to the Engineer.
The project consists of the following main components:
clay core rockfill dam of 165m height
powerhouse cavern 30m*50m*151m (span, height, length) plus extension of another 112 m length with a total installed capacity of 2000MW
trafo cavern 15m*23m*114m (span, height, length) plus extension
two headrace tunnels/pressure shafts for each stage with 10.5m excavation diameter
two tailrace tunnels for each stage with 12.5m excavation diameter
main access tunnel and a separate access tunnel to the PHC-Extension both with 8m excavation diameter
two diversion tunnels (one of which will function as a bottom outlet) with 11m excavation diameter.
Construction of the diversion tunnels started in June 1992 and in September 1995 the river was diverted.
