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Title:

Recurrent Pavement Damage from Underlying Expansive Soil Deposits - Idaho Experience
Cover of Recurrent Pavement Damage from Underlying Expansive Soil Deposits - Idaho Experience

Accession Number:

01594134

Record Type:

Component

Abstract:

A section of US-95 just North of the Oregon/Idaho border (MP 0 to 18.5) has experienced recurrent heaving-related distresses over several years. Research studies were undertaken in the past to investigate the mechanisms contributing to the excessive heaving and to evaluate the feasibility of implementing different stabilization techniques for the subgrade. These studies have indicated the presence of high liquid limit (ranging from 45% to 150%) soils with free swell index values greater than 100%. One- dimensional swell tests performed on both disturbed and undisturbed soil samples showed that the remolded (disturbed) soil samples exhibited swelling as much as 30% and swell pressures up to 0.57 MPa (6 tsf). The undisturbed soils on the other hand did not exhibit any swelling characteristics. Lime stabilization was suggested as the most suitable alternative to minimize or delay swelling along with hydraulic barriers (both vertical and horizontal). After rehabilitation work performed in 2005, the pavement sections performed well except for few sections between milepost 16.7 and 18.5, which have since showed heave-related distress. This paper presents a summary of past studies, their recommendations and the experiences thereafter. Details of the subgrade properties established for this stretch of the pavement section thorough subsurface exploration and laboratory characterization are reported in this paper along with inferences on factors that could contribute to the recurrent heaving problem. Potential rehabilitation and stabilization methods are discussed, and details of an ongoing study to identify the active zone for this expansive subgrade between milepost 16.7 and 18.5 are presented.

Supplemental Notes:

This paper was sponsored by TRB committee AFS80 Standing Committee on Cementitious Stabilization. Alternate title: Recurrent Pavement Damage from Underlying Expansive Soil Deposits: Idaho Experience

Monograph Accession #:

01584066

Report/Paper Numbers:

16-5940

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Chittoori, Bhaskar C S
Mishra, Debakanta
Bruce, Daris
Ingram, John

Pagination:

15p

Publication Date:

2016

Conference:

Transportation Research Board 95th Annual Meeting

Location: Washington DC, United States
Date: 2016-1-10 to 2016-1-14
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Geographic Terms:

Idaho

Subject Areas:

Geotechnology; Highways; Maintenance and Preservation; Pavements

Source Data:

Transportation Research Board Annual Meeting 2016 Paper #16-5940

Files:

PRP, TRIS, TRB, ATRI

Created Date:

Jan 12 2016 6:38PM