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Title:	Tiefe Baugrube in Teildeckelbauweise am Alsterufer in Hamburg
Abstract:	Direkt an der Hamburger Außenalster wurde für die Errichtung hochwertiger Büro- und Gewerbeflächen mit vier Untergeschossen eine ca. 13 m tiefe Trogbaugrube in Schlitzwandbauweise und mit natürlicher Dichtsohle erforderlich. Aufgrund von sensibler Nachbarbebauung waren nur geringe Baugrundverformungen verträglich. Dies konnte mittels einer innen liegenden Aussteifung als vorgespanntes Stahlfachwerk in der oberen Steifungslage und einem Stahlbetonteildeckel in der unteren Steifungslage sichergestellt werden. Im Rahmen eines umfangreichen Messprogramms wurden die im Entwurf berechneten Baugrundverformungen bestätigt. Deep excavation pit with partial concrete cover at Alsterufer in Hamburg Along with the development of an exclusive office- and business building with four underground parking levels an about 13 m deep excavation pit with diaphragm walls and natural bottom sealing was needed. Considering the sensitive neighbouring buildings only little deformation of the underground was acceptable. By using a pre-stressed inner framework as upper bracing and a partial concrete cover as lower bracing the requirements were fulfilled. Already during preliminary design calculated ground deformations could be approved by an extensive measuring program accompanying the project.
Source:	Bautechnik 90 (2013), No. 11
Page/s:	753-758
Language of Publication:	German

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