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62 - EFEITO DO ESPAÇAMENTO ENTRE REFORÇOS NO COMPORTAMENTO DE MUROS DE SOLOS FINOS REFORÇADOS COM GEOGRELHAS

Doi: 10.47094/COBRAMSEG2026.4/62

PALAVRAS CHAVE: Contenção, Solo Reforçado, Geossintético, Geogrelha, Solos finos.

KEYWORDS: Retaining Wall; MSEW; Geosynthetics; Geogrid; Cohesive Soil.

ABSTRACT:
To demonstrate that smaller vertical spacing results in more homogeneous structures with smaller displacements, even when embankments are composed of fine and cohesive soils, the instrumented construction of two full-scale prototypes, 2 m high, was carried out. The embankments were made of fine soil with a cohesion of 33.2 kPa at optimum moisture content and were instrumented with mechanical extensometers and face displacement gauges, with Wall 01 built with six geogrids of 20 kN/m, spaced every 30 cm, and Wall 02 with three geogrids of 40 kN/m, spaced every 60 cm. The structures were subjected to surcharge loads ranging from 20 to 120 kPa. The reinforcements of Wall 01 exhibited maximum strains along a band crossing the entire reinforced mass, similar to Rankine’s failure surface, whereas Wall 02 showed maximum strains in the facing region, indicating a higher stress level in this area, considered critical for reinforced soil structures. The results showed that the use of smaller vertical spacing between reinforcements was able to reduce facing displacements and, consequently, enable the construction of stiffer and more homogeneous structures.

Autores

  • Fernando Henrique Martins Portelinha

  • Paulo Eduardo Oliveira da Rocha

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