Strahov Car Tunnel
INVESTOR:
Magistrát hl. města Prahy
Section of Municipal Investor
Prague 1, Vyšehradská 51
Section of Municipal Investor
Prague 1, Vyšehradská 51
DIRECT INVESTOR:
Výstavba inženýrských staveb a.s.
Prague 4, Bezová 1658
Prague 4, Bezová 1658
SUPPLIER:
Metrostav a.s.
Koželužská 2246
Prague 8 180 00
Phone: 02/667 09 331
Fax: 02/667 09 187
Koželužská 2246
Prague 8 180 00
Phone: 02/667 09 331
Fax: 02/667 09 187
DESIGNER:
PÚDIS a.s.
Prague 10, Nad vodovodem 2/169
Construction Duration:
1985 - 11/1997
Prague 10, Nad vodovodem 2/169
Construction Duration:
1985 - 11/1997
INVESTMENT COSTS:
4 811 million CZK
TECHNICAL DATA:
Part of the Prague road system, the Strahov car tunnel connects the quarters of Smíchov and Břevnov in two double lane tunnel ducts with level connection to the existing road network in Břevnov and multilevel connection in Smíchov.
The design and implementation of the tunnel was substantially influenced by the size of the cross profile of the tunnel, quality of the geological environment, its variability and the height of the the hanging layer over the vault.
With regard to the cross profile of 125 m2 and with regard to the geological conditions, the driving was performed using a modified German system. The tunnel from was divided into four parts, two support tunnels, a tunnel roof and the kernel with lower vault. In segments with difficult geological conditions with the portals semi-circular roof shields were used. In places with more favourite geological conditions, in central tunnel segments, special modified erectors were used.
Air-shafts are connected to the tunnel ducts approximately in the middle. Tunnel airing is transversal and with forced circulation. The carriage way of the Strahov tunnel is made of a continually reinforced cement-concrete plate.
GENERAL BASIC DATA:
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Total tunnel length:
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2000 m
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of which driven:
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1544 m
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excavated parts:
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460 m
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constructed tunnels:
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western and central
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number of roadways:
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2
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roadway width:
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3.5 m
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underpass height:
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4.8 m
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gradient:
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3.2 %
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maximum depth level line under the terrain:
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88.6 m
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