Study of the Influence of Rainwater on the Railway Track

Análise da influência da variação de umidade no comportamento de solos tropicais

“…A curva de retenção da amostra 1 foi obtida a partir do teste realizado no equipa-mento HYPROP e ajustada pelo modelo bimodal Fredlung-Xing utilizando o programa HYPROP-FIT, que se mostrou o que melhor se ajustou entre os cinco modelos disponíveis Figura 5. (Menezes, 2022) Ao incluir os pontos complementares do teste WP4-C no programa HYPROP-FIT, obteve-se uma nova curva com a aparência mostrada na Figura 6.…”

“…O modelo hidráulico foi construído usando a opção multilinear, e as funções hidráulicas derivadas experimentalmente foram inseridas com base nas tabelas 2, 3 e 4. 0,0099 0,0099 0,0093 0,0067 0,0042 0,0019 0,0020 0,0016 0,0009 0,0021 (Menezes, 2022) Contribuciones a Las Ciencias Sociales, São José dos Pinhais, v.16, n.7, p. 6212-6230, 2023 0,0074 0,0077 0,0083 0,0081 0,0045 0,0051 0,0016 0,0004 0,0001 0,0000 (Menezes, 2022)…”

Analysis of the Influence of Moisture Variation on the Behavior of Tropical Soils of Carajás Railway

“…The second stage of this study involved the utilization of numerical modeling through the software IVFlow, to simulate water infiltration on the railway platform. IVFlow was jointly developed by the Military Institute of Engineering (IME) and VALE SA [27]. The software uses the finite element method to solve the Richards equation [28], which governs the transient process of groundwater infiltration.…”

“…Given that this study employs tropical soils as a subballast material, it is important to acknowledge that, as pointed out by Nogami and Villibor [9], lateritic soils classified as tropical soil have promising potential for pavement use due to their high resistance and low permeability, qualities of great interest in permanent way projects. Indeed, according to some authors ( [10][11][12][13][14][15][16][17][18][19]) the use of lateritic soils in the subballast layer has demonstrated satisfactory performance.…”

“…Menezes [14] conducted a comparative analysis of the performance of five soil types used in the subballast layer, as a capillary barrier to protect the subgrade of a railway platform under the impact of rainfall. The study revealed that sandy lateritic soil and lateritic sand exhibited a superior performance compared to other soil types.…”