Borehole geotechnical testing tool for lunar exploration

T. Kobayashi, S. Aoki, H. Kanamori, R. Fukagawa, S. Wakabayashi, T. Tsuji

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Soil mechanics study plays a key role in various engineering problems relating to future lunar/planetary surface explorations. In-situ measurement of regolith physical properties is of fundamental importance in developing a framework of lunar/planetary soil mechanics. An in-situ soil investigation package; LSM (lunar soil mechanics investigation system) is being developed as a moon utilization payload for Japan's Moon lander SELENE-2, which is planned as a follow-on program of Kaguya program (SELENE). This paper focuses on a soil testing tool, which is one of the subsystems of LSM, and describes a result of laboratory experiments using a prototype model. The equipment developed is a small-diameter tool with a paired-inflatable blade and is used in a pre-frilled borehole for performing two types of soil mechanics test; lateral loading test and direct shear test against the borehole sidewall. In this study, a series of shear tests were demonstrated with a Japanese lunar soil simulant (FJS-1) and the results were compared with results of a triaxial compression test and direct shear box test. The test results showed that the proposed method has a great potential to be a reliable tool that can provide strength parameters on the lunar surface. The characteristics and underlying limitations of the probe were also discussed for future improvements.

Original languageEnglish
Title of host publicationEarth and Space 2012 - Proceedings of the 13th ASCE Aerospace Division Conference and the 5th NASA/ASCE Workshop on Granular Materials in Space Exploration
Pages21-30
Number of pages10
Publication statusPublished - Dec 1 2012
Event13th Biennial ASCE Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments, Earth and Space 2012 and the 5th NASA/ASCE Workshop on Granular Materials in Space Exploration - Pasadena, CA, United States
Duration: Apr 15 2012Apr 18 2012

Publication series

NameEarth and Space 2012 - Proceedings of the 13th ASCE Aerospace Division Conference and the 5th NASA/ASCE Workshop on Granular Materials in Space Exploration

Other

Other13th Biennial ASCE Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments, Earth and Space 2012 and the 5th NASA/ASCE Workshop on Granular Materials in Space Exploration
CountryUnited States
CityPasadena, CA
Period4/15/124/18/12

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Environmental Engineering
  • Building and Construction

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  • Cite this

    Kobayashi, T., Aoki, S., Kanamori, H., Fukagawa, R., Wakabayashi, S., & Tsuji, T. (2012). Borehole geotechnical testing tool for lunar exploration. In Earth and Space 2012 - Proceedings of the 13th ASCE Aerospace Division Conference and the 5th NASA/ASCE Workshop on Granular Materials in Space Exploration (pp. 21-30). (Earth and Space 2012 - Proceedings of the 13th ASCE Aerospace Division Conference and the 5th NASA/ASCE Workshop on Granular Materials in Space Exploration).