Title:
METHOD AND APPARATUS FOR MEASURING DYNAMIC SUPPORTING FORCE OF PILE
Document Type and Number:
Japanese Patent JPS6373128
Kind Code:
A
Abstract:
PURPOSE:To compute dynamic supporting force efficiently, by measuring the acceleration of a pile with an accelerometer, integrating the values twice, computing the amount of displacement, computing the amount of penetration of the pile and the rebounding amount when the speed of the penetrating pile becomes zero, and operating the values. CONSTITUTION:The acceleration of a pile 1 when it is driven with a hammer is measured with an accelerometer 2. The acceleration signals are sampled in a sampling circuit 4 through an amplifier circuit 3. The result is stored in a memory 9 through an A/D converter circuit 8. An integrating circuit 10 integrates the acceleration signals, and a speed is computed and stored in a memory 11. An integrating circuit 12 integrates the speed signals, and the amount of displacement is computed and stored in a memory 13. A CPU 14 obtains the amount of displacement when the speed is zero. The amount of penetration (s) of the penetrating pile 1 and the rebounding amount (k) are computed based on the amount of displacement. The values of (s) and (k) are substituted into a linear wave equation in the CPU, and dynamic supporting force is computed.
Inventors:
UTO KAZUMA
IWASHITA FUMIHIKO
OMORI HIROSHI
KAWAMURA TAKUJI
NINOMIYA KOJI
IWASHITA FUMIHIKO
OMORI HIROSHI
KAWAMURA TAKUJI
NINOMIYA KOJI
Application Number:
JP16990486A
Publication Date:
April 02, 1988
Filing Date:
July 21, 1986
Export Citation:
Assignee:
UTO KAZUMA
JAPAN STEEL & TUBE CONSTR
JAPAN DEV & CONSTRUCTION
JAPAN STEEL & TUBE CONSTR
JAPAN DEV & CONSTRUCTION
International Classes:
E02D13/06; G01L5/00; (IPC1-7): E02D13/06; G01L5/00
Attorney, Agent or Firm:
Masatoshi Sato (3 others)