1 INSPEÇÕES EM FUNDAÇÃO DE CONCRETO Certificada ISO 9001:2008
2 O SISTEMA Equipamento de inspeção em fundações de concreto. Pile Testing System
3 A APLICAÇÃO Sistema de avaliação rápida e simples.
4 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
5 Frequency Domain Velocity/Time Force/Time Force/Frequency Velocity/Frequency FFT Mobility XFer Pile Testing System
6 Time Fixed End Condition - Undamped Time domain Length = velocity x time / 2 Frequency Frequency domain ∆F½∆F Length = velocity / 2 ∆F t Fixed End
Frequency Time Fixed End Condition - Damped Effectively an increase in pile impedance Increase in section Stiff Soil Interfaces Rock Socket Head Response – time domain Head Response – frequency domain
Un-damped Free End Condition Free End ∆F Length = velocity x time / 2 Length = velocity / 2 ∆F Time domain Frequency domain
Frequency Time Free End Condition - Damped Effectively a decrease in pile impedance: Pile Toe/Crack Decrease in Quality Soft Pile Toe Head Response – time domain Head Response – frequency domain
10 V/F Length = c/2∆f Stiffness = 2π f(m) V/F(m) Mobility = 1/ρcA Frequency VFVF Impulse Response (Mobility) Curve
11
SERVIÇO DE INSPEÇÃO EM FUNDAÇÃO DE CONCRETO
13 FIM Obrigado !