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Laboratory evaluation of footings for lunar telescopesPresented here are the results of laboratory experiments with diffferent footing shapes for lunar telescopes. These experiments used a variety of soils including some to simulate regolith response. Based on what is known of regolith and regolith-structure interaction, a shallow-multiple-contact points footing foundation can be adequately designed to support lunar telescopes. Plane-strain load-displacement tests were conducted with different footings and different lunar simulants in a deep transparent plexiglass container. The model footings considered include the rectangular, hemispherical, and spudcan designs. Simulants used to reproduce the mechanical properties of the lunar regolith were fly ash, crushed basalt with and without glass, and a processed lunar simulant. Load-displacement curves were obtained for the different footings in Ottawa sand and in the crushed basalt with glass. The spudcan footing was found to be self-digging and yet stiff, thus providing excellent lateral stability in a large variety of soils.
Document ID
19930058147
Document Type
Conference Paper
Authors
Chua, Koon M. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Golis, Kelly M. (New Mexico Univ. Albuquerque, United States)
Johnson, Stewart W. (BDM International, Inc. Albuquerque, NM, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1992
Publication Information
Publication: In: Engineering, construction, and operations in space - III: Space '92; Proceedings of the 3rd International Conference, Denver, CO, May 31-June 4, 1992. Vol. 2 (A93-41976 17-12)
Subject Category
GROUND SUPPORT SYSTEMS AND FACILITIES (SPACE)
Funding Number(s)
CONTRACT_GRANT: NAG8-856
Distribution Limits
Public
Copyright
Other

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IDRelationTitle19930057979Analytic PrimaryEngineering, Construction, and Operations in Space III