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Edition:Final: September 1991 - August 1
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Abstract:A retaining wall is typically used to form the permanent wall of an excavation whenever space requirements make it impractical simply to slope the sides. During the last 20 years, reinforcement of the backfill has gained widespread popularity because of its flexibility, ease of installation, and economic advantages. A new design has been proposed by the TxDOT using facing panel units anchored into a cement stabilized backfill of sufficient strength to avoid the need for any soil reinforcement at all. As long as the intact strength of the stabilized soil has been sufficiently improved by cement addition, the structure becomes a conventional mass gravity structure. In order to address the practical problems involved in any new design, two experimental walls were built at full scale, as part of on-going Texas Department of Transportation construction. These were extensively instrumented to check their long-term behavior, which, after some initial difficulties, has now been proven satisfactory. This report documents the data obtained from the field instrumentation, both immediately after construction and for a period of two years afterwards. These results confirm that such a design, if properly engineered, can perform satisfactorily.
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