Chapter
Dec 28, 2013
Monitoring of Movements above Large Shallow Jacked Tunnels
Publication: Jacked Tunnel Design and Construction
Abstract
The construction of CA/T Contract C09A4 entails the jacking of three (reduced from four) tunnels beneath eight sets of Amtrak and MBTA commuter rail tracks at South Station in downtown Boston. The tunnels range up to 38 feet (11.5m) in height and 79 feet (24m) in width, and crowns are separated from the tracks by only 8 to 23 feet (2.4 to 7m) of manmade fill. The original design called for the tunneled ground to be extensively treated with a combination of dewatering, jet grouting, penetration grouting and soil nailing, but surface settlements could still have reached as much as 13.5 inches (34cm). There was need to monitor both subsurface movements and rail settlements to protect the tracks, so designers provided for 200 subsurface instruments of eight different types, upwards of 1200 optical survey points on tops of rails, 1200 railroad "hubs" for determining dynamic rail movements, and special software developed to quickly sort and report hundreds of rail elevation measurements made every day. Studied and rejected were a computerized hand propelled Portable Geometry Trolley for measuring static rail elevations and an extensive array of remote reading Electrolevels and Beams for determining both static and dynamic rail elevations. The post-bid deletion of one tunnel and replacement of design ground treatment with ground freezing forced construction managers to continually adjust the mix of instrument types, numbers, locations and installation procedures to stay abreast of developments.
Get full access to this article
View all available purchase options and get full access to this chapter.
Information & Authors
Information
Published In
Copyright
© 1999 American Society of Civil Engineers.
History
Published online: Dec 28, 2013
Permissions
Request permissions for this article.
ASCE Technical Topics:
- Construction engineering
- Construction management
- Construction methods
- Foundations
- Geomechanics
- Geotechnical engineering
- Infrastructure
- Jacking
- Rail transportation
- Railroad stations
- Railroad tracks
- Shallow foundations
- Soil dynamics
- Soil mechanics
- Soil settlement
- Terminal facilities
- Transportation engineering
- Transportation management
- Tunnels
Authors
Affiliations
Charles W. Daugherty
Parsons Brinckerhoff Quade & Douglas, Inc.
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.
View Options
Get Access
Access content
Please select your options to get access
Log in/Register
Log in via your institution (Shibboleth)
ASCE Members:
Please log in to see member pricing
Purchase
Save for later Item saved, go to cart Information on ASCE Library Cards
ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Get Access
Access content
Please select your options to get access
Log in/Register
Log in via your institution (Shibboleth)
ASCE Members:
Please log in to see member pricing
Purchase
Save for later Item saved, go to cart Information on ASCE Library Cards
ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.