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Title:

Numerical Analysis of a Soil Nail Wall System in Expansive Clays

Accession Number:

01592701

Record Type:

Component

Abstract:

Current design procedures for soil nail walls are based on the Rankine/Coulomb slip surface equilibrium approach modified to account for the tensile forces exerted by the soil nails. These methods are not appropriate for soil nail walls installed in expansive clays because they do not consider the interaction between the wall and the pressures exerted due to soil volume changes. This paper presents a numerical approach to the analysis of this problem. It involves laboratory testing to establish soil parameters and the soil-water characteristic curve, field measurements of in-situ soil moisture changes at a Southern Texas site and finite element analysis to model the soil nail-wall system under changing moisture conditions. The results show significant dependence of horizontal wall pressures/displacements and soil nail axial forces on the swelling caused by soil moisture changes. This points to the need for detail analysis of these systems for design purposes.

Supplemental Notes:

This paper was sponsored by TRB committee AFP60 Standing Committee on Engineering Behavior of Unsaturated Soils.

Monograph Accession #:

01584066

Report/Paper Numbers:

16-2785

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Papagiannakis, A T
Diaz, M
Bin-Shafique, Sazzad

Pagination:

9p

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:

Texas

Subject Areas:

Bridges and other structures; Geotechnology; Highways

Source Data:

Transportation Research Board Annual Meeting 2016 Paper #16-2785

Files:

TRIS, TRB, ATRI

Created Date:

Jan 12 2016 5:14PM