Enquiry:hkmarketing@epc.com.hk 
Whatsapp Enquiry: +85261990717
TRT-V8000 Geological Prediction System
· Tunnel TRT technology for generating a 3D holographic map of the geological structure ahead of the tunnel
· Accurate, comprehensive, and intuitive survey results with easily interpretable features such as faults, fractures, water-rich zones, karst and voids
· Zero consumables with low testing cost
· Wireless connection system for simple, safe, and portable operation
· Short test time without impacting tunnel construction
· Wide applicability: suitable for underground engineering such as railways, highways, water conservancy, and mining with long detection range (100-300 meters)
Introduction
The TRT-V8000 geological Prediction system employs tunnel seismic reflection tomography technology. The core principle is that seismic waves reflect off interfaces with acoustic impedance differences when they encounter geological strata or discontinuities.
Seismic source and accelerometers layout
Specifications
A. Configuration
a. 1 host unit
b. Seismic wave data acquisition software
c. RV3D processing and display software
d. 10 accelerometers
e. 11 wireless trigger modules
f. 1 trigger
g.1 base station to connect the host machine and control remote modules for data collection
h . Base station modules to send data collection instructions to wireless modules and receive collected data from wireless modules and transmit to the host.
B. Parameters
1. Data Acquisition
Wireless data transmission and communication, three-dimensional placement of seismic sources and accelerometers to collect volumetric information.
2. Sources and Triggering Method
· Hammer seismic source, triggered by a sledge hammer
· Controlled source, program-controlled triggering.
3. Accelerometers
single-component sensors, sensitivity 1V/g; frequency range 10-10000Hz
4. Wireless Modules
Record seismic waves and wirelessly transmit recorded seismic waves to the base station; frequency range: 0.7 to 3,900 Hz, record length: 64-8,192ms, sampling rate: 250-32,000 samples/second, analog-to-digital conversion: 24-bit.
5. Host unit
industrial-grade rugged laptop.
6. Analysis Software
Analysis software based on the principle of seismic wave reflection, forecasts the three-dimensional seismic wave impedance information in the forecast area through time filters, frequency filters, and velocity filters, capable of outputting results in 2D and 3D graphics and charts, generating three-dimensional images of geological discontinuities, dip angles, and strike directions, as well as intersections with the tunnel axis, with arbitrary slicing capabilities
7. Forecasting Range
50 meters left and right, up and down from the tunnel centerline, 100-300 meters ahead of the tunnel face
8. Temperature: 0°C to 60°C
9. Transportation Case
2 transportation cases with dimensions of 55cm*43cm*22cm
Controlled source & Hammer source (Sledgehammer)
The TRT-V8000 system provides two choices of sources: controlled source and hammer source. The controlled source generates energy through an industrial vibrator that produces frequency-sweeping source from 100Hz to 3000Hz. The hammer source generates energy through hammer strikes. Both can be used as seismic sources to determine underground structures. However, the controllable source is able to generate higher resolution images in a shorter period of time.
The frequency-sweeping source has been successfully applied in new Austrian tunneling method (NATM) tunnels, TBM tunnels, and mining adits, with applications in multiple tunnel projects including Japan, UK, China and South America.
In a project in Brazil, 40 tests were conducted in a 3km long TBM tunnel, with each test forecasting an area of 200m ahead of the tunnel face. An accuracy of approximately 90% was achieved in detecting anomalies ahead of the tunnel face.
The above tests were specifically used to detect major water-bearing zones within granite. The first water anomaly was detected at around 175m ahead of the TBM, while the second was detected at 51m ahead of the face. Excavation confirmed the presence of a water flow of about 3000 L/min.
