Chapter
Apr 26, 2012
Monitoring Earth Pressure Balance Tunnels in Los Angeles
Authors: Thomas M. Saczynski, Michael Pearce, and Amanda ElioffAuthor Affiliations
Publication: 7th FMGM 2007: Field Measurements in Geomechanics
Abstract
Tunneling using earth pressure balance (EPB) tunneling methods has been active in Los Angeles over the last seven years. Three recent large-diameter EPB tunnel projects have been completed to create approximately 32km (20 miles) of precast concrete lined tunnel excavated through alluvial soils and soft, sedimentary rock. This paper addresses monitoring of ground surface subsidence using data collected from geotechnical instrumentation and TBM performance parameters. TBM operating data are used in conjunction with surface-installed instrumentation to predict surface subsidence. TBM operations may then be adjusted to reduce potential settlement-related damage to adjacent structures or utilities. Monitoring instruments using remote access is also addressed. The paper provides case histories of successful performance monitoring to support future urban tunneling projects.
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Copyright
© 2007 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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ASCE Technical Topics:
- Case studies
- Concrete
- Construction engineering
- Construction management
- Engineering fundamentals
- Engineering materials (by type)
- Equipment and machinery
- Geohazards
- Geomechanics
- Geotechnical engineering
- Instrumentation
- Land subsidence
- Materials engineering
- Methodology (by type)
- Precast concrete
- Project management
- Research methods (by type)
- Soil dynamics
- Soil mechanics
- Soil pressure
- Tunneling
- Tunnels
Authors
Affiliations
Thomas M. Saczynski
P.E.
M.ASCE
Sr. Manager, KBR, 790 Colorado Blvd Suite 900, Pasadena, CA, 91101
Michael Pearce
P.E.
M.ASCE
Sr. Engineer, Ninyo & Moore, 475 Goddard, Suite 200, Irvine, CA, 92618
Amanda Elioff
P.E.
M.ASCE
Sr. Professional Associate, PB Americas Inc., 444 S. Flower Street, Los Angeles, CA 90071
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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.