Chapter
Jun 20, 2012
An Approach to the Evaluation of Underground Intersections in Shallow Rock Cover
Authors: Eric C. Wang [email protected], Donald P. Richards, and Victor W. K. Wu, Ph.D.Author Affiliations
Publication: Problematic Soils and Rocks and In Situ Characterization
Abstract
Design of new transit stations in urban settings typically features underground caverns intersected by surface penetrations and utility tunnels. Moreover, system demands as well as related construction, operation, and maintenance costs often favor a shallow vertical alignment. Many factors, such as opening size, intersection geometry, excavation sequence, two-dimensional (2-D) loading of the individual openings, rock mass classification (Barton's reduced Q at intersections), and rock mass discontinuity orientation with respect to the intersection; impact the evaluation of the three-dimensional (3-D) problem of underground intersections under shallow rock cover. This paper will discuss the background and factors influencing the behavior of cavern-ancillary tunnel connections with low cover. A rational approach, which builds upon the typical 2-D analysis by considering these factors in order to evaluate the 3-D problem, will also be presented.
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Copyright
© 2007 American Society of Civil Engineers.
History
Published online: Jun 20, 2012
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ASCE Technical Topics:
- Analysis (by type)
- Engineering fundamentals
- Geology
- Geomechanics
- Geotechnical engineering
- Highway and road management
- Highway transportation
- Highways and roads
- Infrastructure
- Intersections
- Lifeline systems
- Rock masses
- Rock mechanics
- Rocks
- Structural engineering
- Structures (by type)
- Subsurface utilities
- Three-dimensional analysis
- Transportation engineering
- Tunnels
- Two-dimensional analysis
- Underground structures
Authors
Affiliations
Professional Associate, Parsons Brinckerhoff, One Penn Plaza, New York, NY, 10119. E-mail: [email protected]
Donald P. Richards
P.E.
F.ASCE
Senior Professional Associate, Parsons Brinckerhoff, 400 SW Sixth Avenue, Portland, OR, 97204
Victor W. K. Wu, Ph.D.
M.ASCE
Project engineer, Yu & Associates, 611 River Drive Elmwood Park, NJ, 07407
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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.
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.