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www.ib-ndt.com1
INSPEÇÕES EM FUNDAÇÃO DE CONCRETO
1ª Empresa
de
transferênc
ia de
tecnologia
entre Brasil
e Rússia
neste
segmento Certificada ISO 9001:2008
www.ib-ndt.com2
O SISTEMAEquipamento de inspeção em fundações de concreto.
Pile Testing System
www.ib-ndt.com4
Pile Testing System
Low Strain Test Method
• Based on measuring bar wave response to small hammer impact
• Measures in both time domain and frequency domain
• Can measure dynamic stiffness, length and mobility
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Frequency Domain
Velocity/Time
Force/Time Force/Frequency
Velocity/Frequency
FFT
FFT
Mobility
XFer
XFer
Pile Testing System
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Time
Fixed End Condition - Undamped
Time domain
Length = velocity x time / 2
Frequency
Frequency domain
∆F½∆F
Length = velocity / 2 ∆F
t
Fixed End
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Frequency
Time
Fixed End Condition - Damped
Effectively an increase in pile impedance
Increase in sectionStiff Soil InterfacesRock Socket
Head Response – time domain
Head Response – frequency domain
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Un-damped Free End Condition
Free End
∆F ∆F
Length = velocity x time / 2
Length = velocity / 2 ∆F
Time domain
Frequency domain
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Frequency
Time
Free End Condition - Damped
Effectively a decrease in pile impedance:
Pile Toe/CrackDecrease in QualitySoft Pile Toe
Head Response – time domain
Head Response – frequency domain
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V/F
Length = c/2∆f
Stiffness = 2π f(m)
V/F(m)
Mobility = 1/ρcA
Frequency
VF
Impulse Response (Mobility) Curve
SERVIÇO DE INSPEÇÃO EM FUNDAÇÃO DE
CONCRETO
Contatos:Serra-ESTel: +55 27 3064-0912 +55 27 3064-0832
Fabio CerqueiraCel.: 27 [email protected]
Igor KozyrevCel.: 27 [email protected]
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