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Bertha TBM Access Pit Excavation Complete

Source info:

Author:
Date: 2015-02-09 07:08:45
Blog: GeoPrac.net
URL: http://www.geoprac.net/geonews-mainmenu-63/64-project-related/1596-bertha-tbm-access-pit-excavation-complete

Summary:

The excavation has been completed for the access shaft or rescue shaft that was needed to be able to remove the damaged cutterhead of the Bertha TBM on the Alaskan Way Viaduct Replacement project in Seattle. The target depth of 120 feet was reached on January 30. WSDOT reports that settlement levels have remained stable in the pit area after an earlier settlement issue. In addition to the project update on the WSDOT project page, there is an excellent article on the work done by Malcom Drilling to construct the shafts used to form the excavation walls in the January issue of Foundation Drilling Magazine. I highly recommend that article. You can also see some neat raw video from WSDOT below. [Source: WSDOT Alaskan Way Viaduct Project Page. Image: ADSC]

Content analysis:

Geographic context:

LocationCountryLatitudeLongitude
BerthaUS46.2665-95.0628
SeattleUS47.6036-122.329
Alaskan WayUS47.6113-122.349
ViaductIN27.09877.6633

Keywords:

access shaft, addition, ADSC, Alaskan Way Viaduct, Bertha TBM, cutterhead, earlier settlement issue, Excavation Complete, excavation walls, excellent article, feet, Foundation Drilling Magazine, frontpage, Image, Malcom Drilling, neat raw video, pit area, rescue shaft, Seattle, settlement levels, shafts, target depth, TBM Access Pit, Viaduct Project Page, Viaduct Replacement project, WSDOT Alaskan Way, WSDOT project page

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