Computer Science
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2199..404t&link_type=abstract
Proc. SPIE Vol. 2199, p. 404-413, Advanced Technology Optical Telescopes V, Larry M. Stepp; Ed.
Computer Science
Scientific paper
A 2.5 m-thick cinder layer immediately below the pier of Subaru (Japan National Large Telescope, JNLT) now under construction on the summit of Mauna Kea in Island of Hawaii was improved by recompacting volcanic cinders obtained by excavation at the site mixed with cement. The purpose was to increase the Young's modulus at very small strains of the supporting ground to 500 MPa so as to make the lowest natural frequency of the pier-ground system in its rocking motion to be more than 4.3 Hz. This requirement is essential for the telescope control system to correct as quickly as possible for external and internal disturbance of the telescope tracking. The results of the field and laboratory geotechnical tests including the measurements of elastic wave velocities and cyclic triaxial tests, which were performed for the design of the ground improvement work and the prediction and evaluation of the Young's modulus of the constructed layer, are described.
Karoji Hiroshi
Kohata Yukihiro
Miyashita Akihiko
Tatsuoka Fumio
No associations
LandOfFree
Stiffness of the ground improved to support the pier of JNLT atop Mauna Kea does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Stiffness of the ground improved to support the pier of JNLT atop Mauna Kea, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stiffness of the ground improved to support the pier of JNLT atop Mauna Kea will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1509288