This document provides an overview of setting up and using the PAX pile dynamic analyzer model. It describes the main components of the PAX including inputs, outputs, and menus. It also outlines the process for collecting pile driving data which involves inputting project and pile information, selecting hammer properties, balancing sensors, and starting data collection from the main collect screen. The document provides references for further information on pile hammers and dynamic testing.

1. PILE DYNAMIC ANALYZER
MODEL PAX
1
Erandi H. Chandanayake
BSc. Eng. Civil & Infrastructure

2. SETTING UP THE PAX
2

3. 1. On-off switch
2. Pilot lamp
3. 12 Volt DC input
4. Blow count extension cord input
5. Piezoelectric (PE) main cable input
6. External monitor output
7. Network input
8. USP inputs – 02 no.
9. Piezo resistive (PR) main cable input
10.Battery charger input
11.12 Volt DC output 3

4. PDA
PDA-L
PDA-R
4

5. CONDENSED SETUP SCREEN
5

6. MAIN MENU
6

7. COLLECTING DATA – OVERVIEW
7

8. PILE INFORMATION SCREEN
PROJECT PILE HAMMER SENSORS SAMPLING
8

9. PROJECT TAB
• PJ – PROJECT NAME
• PN – PILE NAME
• PD-PILE DESCRIPTION
• OP-OPERATOR NAME
• LI-LENGHTH OF PENETRATION INCREMENT
• LP-LENGTH OF PENETRATION
9

10. PILE TAB
• AR-CROSS SECTIONAL AREA AT GAGES LOCATION
• LE-LENGTH OF FOUNDATION FROM THE GAGES LOCATION TO THE TOE
• EM-ELASTIC MODULUS OF THE FOUNDATION MATERIAL AT THE GAGES
LOCATION
• SP-SPECIFIC WEIGHT OF THE FOUNDATION MATERIAL AT THE GAGES
LOCATION
• WS-WAVE SPEED
• JC-CASE DAMPING FACTOR
10

11. HAMMER TAB
• CUSTOM HAMMER –
MAKER
NAME
RAM WEIGHT
ENERGY
HAMMER TYPE - INTERNAL COMBUSTION
OPEN END DIESEL
CLOSED END DIESEL
EXTERNAL COMBUSTION
HYDRO BLOCK
VIBRATORY
• HAMMER FROM THE LIST -> SELECT MAKER -> OK 11

12. Max BPM - MAXIMUM BLOWS PER MINUTE
RATE
This is the rate at which the PAX will be able to acquire data.
If the hammer runs at the rate higher than the Max BPM , then some
blows will not be recorded.
12

13. SENSORS TAB
08
Channel
Operation
13

14. Sampling tab allows choosing the sampling frequency and the number of
samples stored for each blow.
Sample Frequency 40, 20, 10, 7, 5, 4, 3, 2.5 kHz
The rate at which analog signals are converted to digital signal is known as
sample frequency.
Sampling size 1024 ,2048 ,4096
Total time stored = sample size x ( 1 / sample frequency )
eg.: T.T.S. = 2048x (1/10000) = 204.8 ms
The Pretrigger Buffer Time specifies the amount of data that will be recorded,
corresponding to the information detected by the sensor just prior to the
triggering.
SAMPLING TAB
14

15. BALANCING GAGES
15
Prior to the acquiring data ,the sensor offsets should be
checked.

16. “CAUTION” POP UP
16

17. MAIN COLLECT SCREEN
17
PAX is in
stand by
position
Flashing
button
1
2 Generate a
calibration
signal

18. CALIBRATION SIGNAL
18
The actual image some
times may not same as
this because of
different scale settings

19. 19
Vertical ScaleHorizontal Scale
Browsing saved data
Adjusting Sensor
Properties
Special Function
Input parameters

20. REFERENCES
• PDAL USER’S MANUAL – NOVEMBER 2008 (PILE DYNAMICS
,INC.)
• HAMMER TYPES, EFFICIENCIES AND MODELS IN GRLWEAP
F. Rausche and A. Klesney
20

21. 21
~ THANK YOU ~