Location

New York, New York

Session Start Date

4-13-2004

Session End Date

4-17-2004

Abstract

The landslip is located in the Giant’s Seat Woods area of Kearsley, Bolton in Greater Manchester, England. The ground conditions at the site comprise made ground material over mudstones of the Manchester Marls. An area of land crossed by Red Rock Lane had, since the late 1700s, experienced land slip resulting in the ground generally moving south towards the adjacent river. By the late 1990’s the movement of the slip had resulted in fractures and fissures under the road and damage to several other services. A project was developed to stabilise the land along approximately 130m of Red Rock Lane. Options to provide a solution included service diversion, improved drainage, toe weighting, dig out and replace, soil nailing, piled wall and a rock anchored pile wall. The ground conditions and compact nature of the site suggested that a drilled minipile and anchored wall would offer the optimum performance. Inclinometer results confirmed clearly that the slip surface lay predominantly within the mudstones, moving at up to 40mm a month, at depths ranging between 3 and 10m below road level. Continued monitoring of the inclinometers and piezometers through construction of the wall provided interesting and useful results regarding the slip behaviour and was finally able to confirm the restoration of the groundwater table and the curtailment of the slip movement.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Fifth Conference

Publisher

University of Missouri--Rolla

Publication Date

4-13-2004

Document Version

Final Version

Rights

© 2004 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Apr 13th, 12:00 AM Apr 17th, 12:00 AM

Monitoring and Stabilisation of the Giants Seat Landslip, U.K.

New York, New York

The landslip is located in the Giant’s Seat Woods area of Kearsley, Bolton in Greater Manchester, England. The ground conditions at the site comprise made ground material over mudstones of the Manchester Marls. An area of land crossed by Red Rock Lane had, since the late 1700s, experienced land slip resulting in the ground generally moving south towards the adjacent river. By the late 1990’s the movement of the slip had resulted in fractures and fissures under the road and damage to several other services. A project was developed to stabilise the land along approximately 130m of Red Rock Lane. Options to provide a solution included service diversion, improved drainage, toe weighting, dig out and replace, soil nailing, piled wall and a rock anchored pile wall. The ground conditions and compact nature of the site suggested that a drilled minipile and anchored wall would offer the optimum performance. Inclinometer results confirmed clearly that the slip surface lay predominantly within the mudstones, moving at up to 40mm a month, at depths ranging between 3 and 10m below road level. Continued monitoring of the inclinometers and piezometers through construction of the wall provided interesting and useful results regarding the slip behaviour and was finally able to confirm the restoration of the groundwater table and the curtailment of the slip movement.