aula vii recalques
TRANSCRIPT
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Aula VII
Recalques em fundações diretas
PROF. M.SC. RICARDO RIBEIRO
FUNDAÇÕES
CCET-160
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Ao aplicar carga em uma fundação direta, inevitavelmente ocorrerão recalques que poderão
atingir algumas dezenas a até milhares de milímetros. Portanto, a hipótese de apoio fixo para
pilares (recalque zero) é mera ficção.
Define-se como recalque de uma sapata, como sendo o deslocamento vertical, para baixo,da
base da sapata em relação ao indeformável. Esse deslocamento é resultante da deformação do
solo. (Diminuição de volume e ou mudança de forma).
No caso de fundações profundas, deve-se acrescentar a compressão elástica do fuste.
Se o subsolo fosse homogêneo e todas as sapatas tivessem as mesmas dimensões, os
recalques seriam praticamente uniformes. Mas a variabilidade do solo, em termos de
compressibilidade,gera recalques desiguais.
Além disso,o tamanho das sapatas ou das bases de tubulões em um edifício pode variar muito,
já que as cargas nos pilares são diferentes, fato esse que, principalmente em argilas é fonte
adicional de recalques.
Introdução: Tipos de recalques
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Introdução: Tipos de recalques
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Introdução: Tipos de recalques
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Introdução: Tipos de recalques
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Recalques Imediatos em Argila (MEH)
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Recalques Imediatos em Argila (MEH)
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Recalques Imediatos em Argila (MEH)
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Camadas finitas e subcamadas argilosas
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Camadas finitas e subcamadas argilosas
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Subcamadas argilosas
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Subcamadas argilosas
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Subcamadas argilosas
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Recalques imediatos em areias
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Recalques imediatos em areias
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Métodos de Schmertmann (1970 / 1978)
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Métodos de Schmertmann (1970 / 1978)
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Métodos de Schmertmann (1970)
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Métodos de Schmertmann (1970)
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Métodos de Schmertmann (1970)
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Métodos de Schmertmann (1970)
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Métodos de Schmertmann (1970)
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Métodos de Schmertmann (1970)
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Métodos de Schmertmann (1978)
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Métodos de Schmertmann (1978)
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Métodos de Schmertmann (1978)
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Métodos de Schmertmann (1978)
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Prova de carga em placa
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Prova de carga em placa
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Prova de carga em placa
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Prova de carga em placa
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Prova de carga em placa
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Prova de carga em placa
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Prova de carga em placa
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Prova de carga em placa
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Prova de carga em placa
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Prova de carga em placa
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Tolerância a recalques e recalques admissíveis
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Tolerância a recalques e recalques admissíveis
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Tolerância a recalques e recalques admissíveis
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Tolerância a recalques e recalques admissíveis
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Tolerância a recalques e recalques admissíveis
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Tolerância a recalques e recalques admissíveis
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Tolerância a recalques e recalques admissíveis
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Exercícios
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Exercícios
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Exercícios
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Exercícios
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Exercícios
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Exercícios
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Exercícios
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Exercícios
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Exercícios
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Exercícios
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Exercícios
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Exercícios
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Exercícios
0,67?
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Exercícios