Location

Chicago, Illinois

Session Start Date

4-29-2013

Session End Date

5-4-2013

Abstract

Jacket Pack Anchor(JP Anchor) is applied the irregular layer that general ground anchor is difficult to be applied such as soft layer(SPT-N values of less than 20) or gravel layer that grout lost. It makes sure of the pullout resistance required in these layers by the certain grout bulb formation and expansion effect. Thereby, Jacket Pack Anchor that is a new concept makes possible the construction improving and the cost saving in the excavation site. From the field test results, it was observed that the pullout resistance of Jacket Pack Anchor was about 84% greater than that of general ground anchor, and plastic deformation of Jacket Pack Anchor compared to that of general ground anchor was about 35% at the same load cycle. Especially, it was showed that the increase of resistance over 200% and plastic deformation was about 17% in gravel layer. This method has been applied mainly in the soft reclaimed soil and marine deposit areas of Inchon and Pusan etc. or in the loose layer of urban waste landfill. From the result of these cases, its usefulness has been proved because of ground displacement and building damage with little during the excavation work. Therefore, we propose strongly to try Jacket Pack Anchor in the past difficult layer from this paper. Also, we are hoping to take the full advantage of ground anchor that is secure enough workspace to minimize disturbance of excavation or underground structure can improve work efficiency, using Jacket Pack Anchor in the excavation site.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Seventh Conference

Publisher

Missouri University of Science and Technology

Publication Date

4-29-2013

Document Version

Final Version

Rights

© 2013 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Apr 29th, 12:00 AM May 4th, 12:00 AM

Application of Jacket Pack Anchor (JP Anchor)

Chicago, Illinois

Jacket Pack Anchor(JP Anchor) is applied the irregular layer that general ground anchor is difficult to be applied such as soft layer(SPT-N values of less than 20) or gravel layer that grout lost. It makes sure of the pullout resistance required in these layers by the certain grout bulb formation and expansion effect. Thereby, Jacket Pack Anchor that is a new concept makes possible the construction improving and the cost saving in the excavation site. From the field test results, it was observed that the pullout resistance of Jacket Pack Anchor was about 84% greater than that of general ground anchor, and plastic deformation of Jacket Pack Anchor compared to that of general ground anchor was about 35% at the same load cycle. Especially, it was showed that the increase of resistance over 200% and plastic deformation was about 17% in gravel layer. This method has been applied mainly in the soft reclaimed soil and marine deposit areas of Inchon and Pusan etc. or in the loose layer of urban waste landfill. From the result of these cases, its usefulness has been proved because of ground displacement and building damage with little during the excavation work. Therefore, we propose strongly to try Jacket Pack Anchor in the past difficult layer from this paper. Also, we are hoping to take the full advantage of ground anchor that is secure enough workspace to minimize disturbance of excavation or underground structure can improve work efficiency, using Jacket Pack Anchor in the excavation site.