Determination of Shear Strength Values for Granular Backfill Material Used by the Wisconsin Department of Transportation

Edil, Tuncer B.; Benson, Craig H.; Bareither, Christopher A.

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Determination of Shear Strength Values for Granular Backfill Material Used by the Wisconsin Department of Transportation

2007-01-01
By Edil, Tuncer B. ; Benson, Craig H. ; Bareither, Christopher A.

File Language:

English

Details

Creators:

Edil, Tuncer B. ; Benson, Craig H. ; Bareither, Christopher A.
Corporate Contributors:

Wisconsin. Dept. of Transportation. Social Media Peer Exchange Planning Team
Subject/TRT Terms:

Backfill Soils Friction Granular Materials Mechanically Stabilized Earth Sand Shear Strength
Publication/ Report Number:

WHRP 07-09
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

Wisconsin. Department of Transportation
Abstract:

This study evaluated the effects of physical characteristics and geologic factors on the shear strength of compacted sands from Wisconsin that are used as granular backfill for mechanically stabilized earth walls and reinforced soil slopes. Physical properties and shear strength were determined for 30 compacted sands collected from a broad range of geological deposits. Relationships between strength-deformation behavior, geologic origin, and physical properties were used to categorize the sands into four friction angle groups. Sands with the lowest friction angle are derived from weathering of underlying sandstones, and tend to be medium-fine, well rounded, and poorly-graded sands. Sands with the highest friction angle are from recent glacial activity and tend to be coarser grained, well-graded, and/or angular. A multiple regression model was developed that can be used to predict friction angle (φ') of the compacted sands based on effective particle size (D10), maximum dry unit weight (γdmax), and Krumbein roundness. The model predicts φ' within ± 2° of the measured φ'.
Format:

PDF
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:f369770d6cf10dc46404e730cde90e40caa7f882102a0507384a0f23e4af5ecfa41c2aa12c67163fa8164776d3963ced922ab3a84c1e8206267ff2b89d18ecbc
Download URL:

https://rosap.ntl.bts.gov/view/dot/29430/dot_29430_DS1.pdf
File Type:

[PDF - 2.54 MB ]

File Language:

English

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