Geological aspects of cut slope failures in the realignment of State Highway 58 at Belmont Road, Wellington, 1993-1994

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SR_1995-005-pdf
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Hancox, G.T.; Brabhaharan, P. 1995 Geological aspects of cut slope failures in the realignment of State Highway 58 at Belmont Road, Wellington, 1993-1994 . Lower Hutt: Institute of Geological & Nuclear Sciences Institute of Geological & Nuclear Sciences science report 95/05 48 p.

Abstract: A case study is presented describing cut slope failures that occurred in 1994 during construction of the 1.7km realignment of State Highway 58 (SH 58) between Judgeford and Pauatahanui, and illustrating the value of engineering geological and geotechnical input into site investigations, design, and construction. Issues discussed include: (a) site investigations and engineering design and construction philosophy adopted by the designers; (b) the nature of the project and cuts in relation to regional and local geology and seismicity; (c) geological assessments of cut slope failures; (d) remedial measures implemented to improve the stability of cuts and reduce hazards; (e) significant engineering geological and geotechnical factors that emerged; and (f) implications for other future roading projects in New Zealand. (auth/JIH)