AVALIAÇÃO DA RESISTÊNCIA AO CISALHAMENTO DE UM SOLO RESIDUAL DE LAMITO COM ADIÇÃO DE FIBRAS DE POLIPROPILENO

Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica Pub Date : 1900-01-01 DOI:10.4322/cobramseg.2022.0761

Diones Uiliam Barboza, Luigi Pelizzoli, Luiza Keller Fragomeni, Lysiane Menezes Pacheco, Cleber de Freitas Floriano

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Abstract

: Aiming to meet the various soil conditions desired in engineering projects, the objective of the present study is to evaluate the geomechanical behavior of a mudstone residual soil compacted at the Intermediate Proctor energy with the addition of polypropylene fibers. The soil sample was taken at the city of Gravataí / RS. Soil characterization (grain specific mass, particle size and Atterberg limits), compaction and consolidated drained shear strength tests were conducted with samples of pure soil and with the addiction of 0.5%, 0,75% and 1.0% of fibers relative to the total mass of soil. It was expected that the optimum amount of fibers to be added would be between the percentages of 0.5% and 1.0%, however, the greatest increase in soil resistance was seen in the addition of 0.5%, while the additions of 0.75% and 1.0% of fibers caused an increase in the volume of voids and a reduction of the internal friction angle when compared to the addition of 0.5%.

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添加聚丙烯纤维的残余层压土的抗剪强度评价

为了满足工程中各种土壤条件的需要，本研究的目的是评估在中间普罗克特能量下加入聚丙烯纤维压实的泥岩残积土的地质力学行为。土壤取样于Gravataí / RS市，采用纯土样品，纤维掺量分别为土壤总质量的0.5%、0%、75%和1.0%，进行土壤表征(颗粒比质量、粒径和Atterberg极限)、压实和固结排水抗剪强度试验。纤维的最佳添加量为0.5% ~ 1.0%，结果表明，纤维添加量为0.5%时，土体阻力增加最大，而纤维添加量为0.75%和1.0%时，孔隙体积增大，内摩擦角减小。

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Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica

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