As one of the main scientific instruments for tunnel engineering detection, ground penetrating radar is widely used in geological advance prediction, lining quality detection, inverted arch quality detection and lining disease detection (voiding, cavity and non-compactness) in the process of tunnel construction. Ground penetrating radar can not only improve the safety factor of tunnel engineering detection, but also effectively ensure the scientificity and reliability of tunnel engineering detection data, which plays a very important role in the application of tunnel engineering detection.

Tunnel detection site

Initial support detection

The 900MHz antenna is used to detect the quality of the primary support, which can detect the number and spacing of the primary arch, the disease of the primary branch and other parameters.

Distribution of primary arches and disease location of tunnels

Second lining detection

Diseases (voiding, voiding, non-compactness) and lining thickness can be detected in reinforced concrete and plain concrete secondary linings using 900MHz and 400MHz antennas.

Cavity disease of reinforced concrete secondary lining	Hollowing and cavity diseases of plain concrete second lining

The disease of non-compaction of plain concrete second lining	Second, the substrate boundary and arch distribution

Inverted arch detection

The use of GER400A and GER200A antennas can detect diseases such as inverted arch concrete thickness and concrete imcompactness.

Radar data of the inverted arch cross-section at the bottom of the tunnel	Longitudinal radar data of the inverted arch at the bottom of the tunnel

Advance forecasting

The 100MHz antenna can effectively detect geological hazards such as karst, faults, and fracture zones in front of the tunnel tunnel in the mode of spot measurement and large-depth superposition.

A project in Yunnan of CCCC Second Public Bureau Karst in limestone	Advance Forecast - Medium and large karst in limestone	Tunnel bottom karst cave detection