Alster half-ring

Alster half-ring approximate route, not all stations
Map of the course of the Alster half-ring
Gauge :	1435 mm ( standard gauge )
(Start of the route) Altona Holstenstrasse Schlump Grindelhof Hallerstrasse Herbert-Weichmann-Strasse / Hofweg Winterhuder Weg Mundsburg Wartenau Landwehr Burgstrasse Rothenburgsort-Nord Hammerbrook South Elbe bridges (End of route)

The Alster Halbring was the name given to a line of the Hamburg subway that was planned but never realized since the 1920s . In the early plans it was also called the half-ring line and from 1950 onwards it was also designated as a G-route / outer ring , the line was rarely given the designation U5 .

Planning of the 1920s

The preliminary planning for an Alster half-ring goes back to the 1920s. At that time they wanted to run a line between Eimsbüttel via Schlump, Hallerstraße and further under the Outer Alster via Mundsburg to Horn. These plans were never carried out. A line between Kellinghusenstrasse and Jungfernstieg , the so-called Kelljunglinie , had priority . At the Hallerstraße stop, preliminary construction work was already carried out on the platform (in the form of a modified support structure), as a transition to a later transverse platform of the Alster half-ring was to be created there.

Planning from 1950

According to the general plan from 1950 and later modifications from the construction plan from 1960, the Alsterhalbring was supposed to connect and better develop the districts of Altona , Eimsbüttel and Eppendorf in the west of the city with Uhlenhorst and Hamm / Rothenburgsort in the east.

As late as 1970, the Hamburg Senate assumed that the Alster Half-Ring would be built after the Lurup line ( planned U4 ) opened. A little later, however, due to financial problems in the city of Hamburg, the subway construction was largely stopped.

It was planned to cross several existing underground lines along the route. Only a few preliminary structural work was done for this. A transverse platform was to be created under the Hallerstrasse station ( Kelljunglinie , today U1). In the middle of the platform, tunnel supports have already been structurally relocated in order to later be able to build an exit to the new, lower platform. To the west of the Burgstrasse station ( Billstedter line , today U2), there are two niches lying one behind the other on the track in the direction of the city center, which would have enabled the Alster half-ring to be threaded into and out of the Alster.

The Winterhuder Weg station should extend over two platform levels, each with two tracks with directional operation. The U5 should have one track on each platform level. The two other tracks should use the U4 (according to the old plan).

literature

• Ulrich Alexis Christiansen: Hamburg's dark worlds. The mysterious underground of the Hanseatic city. Hamburg 2008, ISBN 3-8615-3473-8

See also

• Network expansion and planned expansions

Web links

• Unused and left over / The Alster half-ring on gleismann.de
• 1968 - Schnellbahnbau in Hamburg on horstbu.de

Individual evidence

1. ^ Christiansen archive
2. ↑ Willy Ziemer: Schnellbahnbau in Hamburg , Hamburger Schriften zum Bau-, Wohnungs- und Siedlungswesen Issue No. 49/1969, FHH Building Authority Office for Engineering I, Hamburg 1969