Function Measuring the pile length and localization of pile defects (e.g. cross-section deformations and cracks); Determination of foundation bed occurrence depth; Application as a dual-channel seismic station with separate timing channel; Application as a sonar.   The IDS-1 set includes: Electronic module Seismic pick-ups Charging unit Set of cables Set of documentation Transportation bag

Pile length measuring method

The method is based on measuring the response time for the signal reflected from the other end of pile or from obstacles inside thepile that emerge due to its inhomogeneity. The lenght is calculated based on the known speed of primary wave for various types of piles and measured response time. The source of primary waves is a special hammer; the seismic pick up serves as a pick up of elastic vibration.

Software

Built-in software allows for quick pile length measuring and detection of pile defects.

Setting parameters allow for a wide variety of measurements in various environments (pile of different length, different types of soil, external disturbance).

The unit file system allows for recording, erasing and viewing up to 4000 files with the measured data. Build-in memory with capacity up to 256 MB.

External software compatible with Windows 98, Windows 2000 and Windows XP allows for copying files to PC, further data processing, and printing out reports. Standard Ethernet and RS-232 based interface to facilitate data exchange with PC.

STRUCTURE AND FOUNDATION ACOUSTIC SURVEY METHOD

Basic current tasks

1. Determination of the length and strength of the reinforced-concrete displacement piles, bored piles and metal piles.
Longitudinal and torsional oscillations are generated by means of impact excitation at the head of a pile; the reflected waves from the end of the pile and from the non-uniformiti es are recorded. For quality control of pile foundation assembly based on bored piles seismic-acoustic investigations are successfully applied. Generally the length of the bored piles is known and it is determined by the geologic structure and design solution, that is why the record of reflected waves from the end of a pile makes possible determination of the acoustic wave path average velocity, and consequently the average value of uniaxial compression strength.

2. Determination of the reinforced concrete raft to ground base coupling condition:
Coupling condition affects the reinforced concrete raft strength and foundation bearing capacity. To evaluate the coupling condition, reflection performance feature from the bottom of the base plate, depending on elastic impedance of adjacent base, is used.