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Slope Stability - White Rock Hastings 2023

View from the crest of the slope

Slope Stability - White Rock Hastings 2023

View of the completed works

 

Year of installation

2023

Initial situation

Hastings is a seaside town on the south coast of England in East Sussex. In 2022 a private property had been experiencing minor rockfall issues from the rockface directly behind the property. The geology of the rockface comprised siltstone, sandstone and mudstone with several changes in slope angle and bedrock quality. Due to the proximity to the coastline, the potential for corrosion needed to be considered. Due to the limited space between the property and the rockfall, a rockfall fence was no option.

Geology

Interbedded sandstone, mudstone and siltstone (Tunbridge Wells Sand Formation)

Description

Working with Kent & Sussex Geotechnical, we assisted in assessing options for the stablisation of the rockface. Due to the anticipated atmospheric corrosion on site, a stainless steel stablisation was the best option to ensure the maximum possible design life for the project in a coastal environment. Using information from the site and geotechnical data for the bedrock units and RUVOLUM, a TECCO G65/3 stainless solution was appropriate with a horizontal and vertical nail spacing of 2.2 metres for the upper sandstone and siltstone units. The lower mudstone unit on site caused concerns due to its higher weathering rate than the upper sandstone and siltstone units. The solution for the mudstone was a shotcrete solution beneath the rock slope stablisation. The installation of the TECCO system utilised rope access from the top of the slope.

Protected object

Residential area

Corrosion protection

INOX / STAINLESS

Other participating companies

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Kevin H. Coyle
 

Kevin H. Coyle

Regional Manager Northeast

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Hydraulic Engineering
Geobrugg North America, LLC,3 Beaudet Terr,Columbia CT 06237 / United States Regional Manager Northeast

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Saleh Feidi

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Geobrugg North America, LLC,8921 Emperor Ave.,San Gabriel, California 91775 / United States Regional Manager California

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John Kalejta

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Geobrugg North America, LLC,3215 67th Avenue Pl,Greeley CO 80634 / United States Regional Manager Central US

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Bob Lyne

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Geobrugg North America, LLC,8004 Windspray Drive,Summerfield NC 27358 / United States Regional Manager Southeast

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Pierce Runnels, Civil Engineer
   

Pierce Runnels

General Manager Geobrugg North America

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Geobrugg North America, LLC,22 Centro Algodones , Civil Engineer General Manager Geobrugg North America

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Tim Shevlin

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Geobrugg North America, LLC,Salem OR 97302 / United States Sales Director

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