Automatic Test of Wave velocity And Ground Tapping Test Wave Velocity In The Hole Scilicet
3D Suspension Borehole Logging System

 Product description:

3D Suspension Borehole Logging System is a four-channel high-resolution, digital wave speed tester with time-sharing, superimposition, filtering, signal enhancement, noise suppression, real-time calculation in the field, display of measured waveforms and test results.

3D Suspension Borehole Logging System is mainly composed of wave speed tester, wave velocity detector (referred to as probe), three-component detector, trigger detector, ground pulse sensor and special cable. The wave velocity detector is mainly sealed by cylindrical metal waterproof. Electromagnetic excitation source, two independent fully sealed detectors, damping and high-strength soft hose.

Application range:

1. Applicable engineering survey shear wave and compression wave test;

2. It is suitable to divide the stratum and determine the bearing layer of the foundation;

3. Provide parameters for seismic design: classify site soil type and site type, and discriminate ground soil liquefaction;

4. study the engineering properties of the soil layer;

5. Suitable for dividing rock weathering layer;

6.Suitable for deep wave drilling and wave velocity testing of harsh conditions in the formation, not subject to site conditions;

7.study the vibration characteristics of the foundation;

8. Research on geological disasters such as landslides;

9. Applicable pulsation excellence cycle test, etc.

According to the standard:
"Geotechnical Investigation Specification"-GB 50021—2001
"Code for seismic design of buildings"-GB50011—2010
"Code for Testing Ground-Based Dynamic Characteristics"-GB/T50269-97
"High-rise building geotechnical investigation procedures"-JGJ72-2004
"Port Geotechnical Investigation Specification"-JTS133-1-2010
"Port Engineering Geological Survey Specification"-JTJ240-97

Product Function:

1.Applicable to the excitation mode in the hole, that is, the excitation in the hole, the receiving in the hole, without the need to strike the vibration source on the ground, to achieve the accuracy of the wave velocity test in the hole;

2.Applicable to the shackle mode, that is, using the heavy hammer to strike the ground vibration plate, so that the vibration wave propagates down the formation to realize the wave velocity test;

3.  It is suitable for low frequency vibration sensor to test parameters such as excellent cycle, amplitude, speed and acceleration.

Features:
1. Adopt 8-inch high-definition high-brightness color touch screen with special touch pen;

2. The acquisition operating system is WinCE 6.0, and the analysis software supports winXP, win7, and win10 systems.

3. Support internal trigger and external trigger sampling mode;

4. The graphic is saved in *.bmp and *.word format, and the word report format can be issued.

5. Applicable to all kinds of complex geological formation wave velocity test, not affected by the external environment;

6. Convenient operation, stable performance, industrial-grade motherboard, high signal-to-noise ratio, strong anti-interference ability, adapt to harsh environment;

7. It adopts imported chassis, the whole machine is sealed, beautiful and firm, the structure is reasonable, and it has good anti-vibration, moisture-proof, waterproof and dust-proof performance;

8. The instrument adopts built-in rechargeable lithium battery, which can work continuously for not less than 16 hours, and is equipped with a special charger;

9. The instrument is small and light, easy to carry, especially suitable for complex geophysical field testing.

Working principle:
3D Suspension Borehole Logging System is a method for determining the wave velocity of the formation where the hole is located by using the detector placed in the borehole to receive the S-wave signal from the source to the first arrival time.

In the borehole, the well fluid is used as the coupling agent, and the electromagnetic shock source is applied to the borehole wall to exert an instantaneous impact force. Two types of particle vibrations are generated in the borehole formation. One is that the particle vibration direction is perpendicular to the borehole wall. , propagating along the direction of the well wall, called S wave (shear wave, shear wave); the other is that the particle vibration direction and the propagation direction are the same as P wave (compression wave, longitudinal wave).

The detector receives the vibration signal of the S wave and converts it into an electrical signal, and then transmits it to the computer. After the computer processes the signal, the computer uses two cross-correlation analysis methods to automatically calculate the time difference between the propagation of the S wave between the two detectors, thereby calculating The speed of S wave propagation between the two passes.

Technical Parameters: