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High Capacity Micropiles
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Mandalay Bay Hotel, Las Vegas NV
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| July 1998 - December 1998 |
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In 1998 during the final stages of construction, the $850-million
Mandalay Bay Casino in Las Vegas experienced severe settlement problems.
These problems were further compounded when it was found the core of
the building was settling at a much faster rate than the outer wings,
thus creating substantial differential stresses throughout the structure.
Geosystems acted as a specialty subconsultant to Kleinfelder, Inc.
of Las Vegas, NV, to provide technical advice during the early “emergency” period,
and to then initiate and perform a Quality Assurance Program during
construction, on behalf of both the owner and the local county authority.
Geosystems was contracted to:
- Provide strategic technical input.
- Train personnel for Clark County approval.
- Observe and record the drilling and installation of 536 micropiles
(7 inch o.d. x 100 feet long).
- Observe and record all grouting activities.
- Test and evaluate the grout samples from every micropile.
- Observe and evaluate the test loading of 536 micropiles.
- Install long term downhole monitoring equipment.
- Observe and oversee the final loading of the micropiles.
- Perform a crack survey on five different levels of the building
before and after load testing.
- Observe and oversee the load testing of five different
levels of the building.
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Contact
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Mr. Walter Vanderpool
Kleinfelder
6380 South Polaris Avenue
Las Vegas, NV 89118
(703) 736-2936 |
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Technical Papers
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Juran, I., D.A. Bruce, A. DiMillio, and
A. Benslimane. (1999). “Micropiles: The State of Practice. Part II:
Design of Single Micropiles and Groups and Networks of Micropiles.” Ground
Improvement, 3 (July) pp. 89-110. |
Bruce, D.A., M.E.C. Bruce, and R.P. Traylor.
(1999). “High Capacity Micropiles – Basic Principals and Case
Histories.” GeoEngineering for Underground Facilities. Proc. of the
3rd National Conference of the Geo-Institute of the American Society of
Civil Engineers. Geotechnical Special Publication No. 90, Urbana-Champaign,
IL, June 13-17, pp. 188-199. |
Zelenko, B.H., D.A. Bruce, D.A. Schoenwolf,
and R.P. Traylor. (1998). “Micropile Application for Seismic Retrofit
Preserves Historic Structure in Old San Juan, Puerto Rico.” Grouts
and Grouting: A Potpourri of Projects. Proceedings of Sessions of Geo-Congress
98, American Society of Civil Engineers, Geotechnical
Special Publication No. 80, Boston, MA, October 18-21, pp. 43-62. |
Bruce, D.A. (1997). Ground
Improvement, Reinforcement, and Treatment: Developments 1987-1997, Chapter 26 on Micropiles,
Proc. of Sessions Sponsored by the Committee on Soil Improvement and Geosynthetics
of the Geo-Institute of the American Society of Civil Engineers, Logan,
UT, July 17-19, Ed. by V.R. Schaefer, Geotechnical
Special Publication No. 69, pp. 151-175. |
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