Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

The Federal Lands Highway Division (FLH), FHWA, is currently investigating the application of polyurethane resin (PUR) injection as a rapidly deployed, cost-effective ground stabilization measure providing superior stabilization performance, while achieving aesthetics objectives . Most recently, in cooperation with the Colorado Department of Transportation (CDOT), FLH completed full-scale PUR demonstration projects at a historic tunnel located along SH 14 in the scenic Poudre Canyon west of Ft. Collins, CO, and at a dry-laid stone masonry wall supporting SH 149 along the Rio Grande River west of South Fork, CO. The Poudre Canyon demonstration involved the “gluing” of a previously bolted section of the western tunnel portal where annual freeze/thaw cycles and rock mass creep toward the adjacent Cache La Poudre River were contributing to rock mass instability. The South Fork demonstration involved PUR injection within a highly-porous, actively failing and culturally-sensitive dry-laid stone masonry wall – a type of retaining structure commonly encountered throughout federal park and forest lands. Based on these investigations, application guidance is being developed for the selection of polyurethane resin products and injection methods when (1) stabilizing failing groundmasses (e.g., rock slopes, unique rock promontories, escarpments), and (2) preserving aging and/or deteriorating man-made structures (e.g., historic retaining walls, archeologic structures).

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Sixth Conference

Publisher

Missouri University of Science and Technology

Publication Date

8-11-2008

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Polyurethane Resin (PUR) Injection for Rock Mass and Structure Stabilization

Arlington, Virginia

The Federal Lands Highway Division (FLH), FHWA, is currently investigating the application of polyurethane resin (PUR) injection as a rapidly deployed, cost-effective ground stabilization measure providing superior stabilization performance, while achieving aesthetics objectives . Most recently, in cooperation with the Colorado Department of Transportation (CDOT), FLH completed full-scale PUR demonstration projects at a historic tunnel located along SH 14 in the scenic Poudre Canyon west of Ft. Collins, CO, and at a dry-laid stone masonry wall supporting SH 149 along the Rio Grande River west of South Fork, CO. The Poudre Canyon demonstration involved the “gluing” of a previously bolted section of the western tunnel portal where annual freeze/thaw cycles and rock mass creep toward the adjacent Cache La Poudre River were contributing to rock mass instability. The South Fork demonstration involved PUR injection within a highly-porous, actively failing and culturally-sensitive dry-laid stone masonry wall – a type of retaining structure commonly encountered throughout federal park and forest lands. Based on these investigations, application guidance is being developed for the selection of polyurethane resin products and injection methods when (1) stabilizing failing groundmasses (e.g., rock slopes, unique rock promontories, escarpments), and (2) preserving aging and/or deteriorating man-made structures (e.g., historic retaining walls, archeologic structures).