Fully rationalized equations for incorporating joint water pressure in rock slope stability analyses at glacier point in yosemite national park, california

C. F. Watts; S. A. Underwood; W. C. Haneberg; J. D. Rogers

Fully rationalized equations for incorporating joint water pressure in rock slope stability analyses at glacier point in yosemite national park, california

C. F. Watts, S. A. Underwood, W. C. Haneberg, J. D. Rogers

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

Accepted methods for incorporating water pressure in rock slope stability analyses were challenged during litigation in which wastewater was linked to fatal rock falls in Yosemite National Park. Defense experts asserted that “serious misinterpretations of basic equations have found their way into mainstream technical literature” and that the free draining model for estimating water pressure widely used in rock slope engineering is “physically inadmissible.” We examined the empirical basis for the model, built a fracture permeameter to simulate water pressures in rock discontinuities, and developed fully rationalized equations for estimating those water pressures. The equations account for the variability of hydraulic conductivity in real discontinuities and the transition from rapid conduit flow to slower Darcian flow through infilling materials. Infillings cause water pressure to develop, adversely influencing stability. For typical conditions—including those reported in Yosemite—the equations predict destabilizing effects similar to Hoek’s free draining equations.

Original language	English
Title of host publication	Landslides and Engineered Slopes
Subtitle of host publication	Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012
Editors	Erik Eberhardt, Corey Froese, A. Keith Turner, Serge Leroueil
Pages	1173-1178
Number of pages	6
State	Published - 2012
Event	11th International Symposium on Landslides and 2nd North American Symposium on Landslides, 2012 - Banff, Canada Duration: Jun 2 2012 → Jun 8 2012

Publication series

Name	Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012
Volume	2

Conference

Conference	11th International Symposium on Landslides and 2nd North American Symposium on Landslides, 2012
Country/Territory	Canada
City	Banff
Period	6/2/12 → 6/8/12

Bibliographical note

Publisher Copyright:
© 2012 Taylor & Francis Group, London.

ASJC Scopus subject areas

Earth-Surface Processes
Geotechnical Engineering and Engineering Geology

Cite this

Watts, C. F., Underwood, S. A., Haneberg, W. C., & Rogers, J. D. (2012). Fully rationalized equations for incorporating joint water pressure in rock slope stability analyses at glacier point in yosemite national park, california. In E. Eberhardt, C. Froese, A. K. Turner, & S. Leroueil (Eds.), Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012 (pp. 1173-1178). (Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012; Vol. 2).

Watts, C. F. ; Underwood, S. A. ; Haneberg, W. C. et al. / Fully rationalized equations for incorporating joint water pressure in rock slope stability analyses at glacier point in yosemite national park, california. Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012. editor / Erik Eberhardt ; Corey Froese ; A. Keith Turner ; Serge Leroueil. 2012. pp. 1173-1178 (Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012).

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title = "Fully rationalized equations for incorporating joint water pressure in rock slope stability analyses at glacier point in yosemite national park, california",

abstract = "Accepted methods for incorporating water pressure in rock slope stability analyses were challenged during litigation in which wastewater was linked to fatal rock falls in Yosemite National Park. Defense experts asserted that “serious misinterpretations of basic equations have found their way into mainstream technical literature” and that the free draining model for estimating water pressure widely used in rock slope engineering is “physically inadmissible.” We examined the empirical basis for the model, built a fracture permeameter to simulate water pressures in rock discontinuities, and developed fully rationalized equations for estimating those water pressures. The equations account for the variability of hydraulic conductivity in real discontinuities and the transition from rapid conduit flow to slower Darcian flow through infilling materials. Infillings cause water pressure to develop, adversely influencing stability. For typical conditions—including those reported in Yosemite—the equations predict destabilizing effects similar to Hoek{\textquoteright}s free draining equations.",

author = "Watts, {C. F.} and Underwood, {S. A.} and Haneberg, {W. C.} and Rogers, {J. D.}",

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year = "2012",

language = "English",

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series = "Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012",

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Watts, CF, Underwood, SA, Haneberg, WC & Rogers, JD 2012, Fully rationalized equations for incorporating joint water pressure in rock slope stability analyses at glacier point in yosemite national park, california. in E Eberhardt, C Froese, AK Turner & S Leroueil (eds), Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012. Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012, vol. 2, pp. 1173-1178, 11th International Symposium on Landslides and 2nd North American Symposium on Landslides, 2012, Banff, Canada, 6/2/12.

Fully rationalized equations for incorporating joint water pressure in rock slope stability analyses at glacier point in yosemite national park, california. / Watts, C. F.; Underwood, S. A.; Haneberg, W. C. et al.
Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012. ed. / Erik Eberhardt; Corey Froese; A. Keith Turner; Serge Leroueil. 2012. p. 1173-1178 (Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012; Vol. 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Underwood, S. A.

AU - Haneberg, W. C.

AU - Rogers, J. D.

PY - 2012

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N2 - Accepted methods for incorporating water pressure in rock slope stability analyses were challenged during litigation in which wastewater was linked to fatal rock falls in Yosemite National Park. Defense experts asserted that “serious misinterpretations of basic equations have found their way into mainstream technical literature” and that the free draining model for estimating water pressure widely used in rock slope engineering is “physically inadmissible.” We examined the empirical basis for the model, built a fracture permeameter to simulate water pressures in rock discontinuities, and developed fully rationalized equations for estimating those water pressures. The equations account for the variability of hydraulic conductivity in real discontinuities and the transition from rapid conduit flow to slower Darcian flow through infilling materials. Infillings cause water pressure to develop, adversely influencing stability. For typical conditions—including those reported in Yosemite—the equations predict destabilizing effects similar to Hoek’s free draining equations.

AB - Accepted methods for incorporating water pressure in rock slope stability analyses were challenged during litigation in which wastewater was linked to fatal rock falls in Yosemite National Park. Defense experts asserted that “serious misinterpretations of basic equations have found their way into mainstream technical literature” and that the free draining model for estimating water pressure widely used in rock slope engineering is “physically inadmissible.” We examined the empirical basis for the model, built a fracture permeameter to simulate water pressures in rock discontinuities, and developed fully rationalized equations for estimating those water pressures. The equations account for the variability of hydraulic conductivity in real discontinuities and the transition from rapid conduit flow to slower Darcian flow through infilling materials. Infillings cause water pressure to develop, adversely influencing stability. For typical conditions—including those reported in Yosemite—the equations predict destabilizing effects similar to Hoek’s free draining equations.

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Watts CF, Underwood SA, Haneberg WC, Rogers JD. Fully rationalized equations for incorporating joint water pressure in rock slope stability analyses at glacier point in yosemite national park, california. In Eberhardt E, Froese C, Turner AK, Leroueil S, editors, Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012. 2012. p. 1173-1178. (Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012).

Fully rationalized equations for incorporating joint water pressure in rock slope stability analyses at glacier point in yosemite national park, california

Abstract

Publication series

Conference

Bibliographical note

ASJC Scopus subject areas

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