Evaluation of in-situ strength of rock fill material taking into account of in-situ density and strength by laboratory test

T. Okamoto

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

5 Citations (Scopus)

Abstract

The density of rockfill material heavily affects on the mechanical property because of non-cohesive material, but evaluation of in-situ density of rockfill material has been difficult issues due to large particle size. This paper studies compaction degree of rockfill material by the existing results of several in-situ rolling compaction tests, and density and confining pressure dependency of already tested strength data of rockfill material. Rockfill material of older dams were dumped, so the density was loose or medium dense. Crest settlements after embankment of dams, which are constructed after almost 1960, were greatly smaller because of heavy compaction roller. Investigated tests consist of large triaxial compression test, and most of Japanese strength tests are based on 30cm of diameter and Marsal, R.J. (1973) with 1130cm of diameter is contained. Rockfill material strength in Japan indicates higher than other countries especially in case of very dense density, and rockfill material strength consisting of shale and slate shows lower. Internal friction angle of rock material except shale and slate shows higher than 40° even with loose condition.

Original languageEnglish
Title of host publicationProceedings of the 4th International Conference on Dam Engineering - New Developments in Dam Engineering
EditorsM. Wieland, Q. Ren, J.S.Y. Tan
Pages693-704
Number of pages12
Publication statusPublished - 2004
Externally publishedYes
EventProceedings of the 4th International Conference on Dam Engineering - New Developments in Dam Engineering - Nanjing
Duration: 2004 Oct 182004 Oct 20

Other

OtherProceedings of the 4th International Conference on Dam Engineering - New Developments in Dam Engineering
CityNanjing
Period04/10/1804/10/20

Fingerprint

Rocks
Compaction
Slate
Shale
Dams
Internal friction
Embankments
Strength of materials
Particle size
Mechanical properties

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Okamoto, T. (2004). Evaluation of in-situ strength of rock fill material taking into account of in-situ density and strength by laboratory test. In M. Wieland, Q. Ren, & J. S. Y. Tan (Eds.), Proceedings of the 4th International Conference on Dam Engineering - New Developments in Dam Engineering (pp. 693-704)

Evaluation of in-situ strength of rock fill material taking into account of in-situ density and strength by laboratory test. / Okamoto, T.

Proceedings of the 4th International Conference on Dam Engineering - New Developments in Dam Engineering. ed. / M. Wieland; Q. Ren; J.S.Y. Tan. 2004. p. 693-704.

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

Okamoto, T 2004, Evaluation of in-situ strength of rock fill material taking into account of in-situ density and strength by laboratory test. in M Wieland, Q Ren & JSY Tan (eds), Proceedings of the 4th International Conference on Dam Engineering - New Developments in Dam Engineering. pp. 693-704, Proceedings of the 4th International Conference on Dam Engineering - New Developments in Dam Engineering, Nanjing, 04/10/18.
Okamoto T. Evaluation of in-situ strength of rock fill material taking into account of in-situ density and strength by laboratory test. In Wieland M, Ren Q, Tan JSY, editors, Proceedings of the 4th International Conference on Dam Engineering - New Developments in Dam Engineering. 2004. p. 693-704
Okamoto, T. / Evaluation of in-situ strength of rock fill material taking into account of in-situ density and strength by laboratory test. Proceedings of the 4th International Conference on Dam Engineering - New Developments in Dam Engineering. editor / M. Wieland ; Q. Ren ; J.S.Y. Tan. 2004. pp. 693-704
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