With the frequent occurrence of road collapse accidents, how to achieve orderly development and utilization and management of underground space has become a difficult problem for relevant departments.
The collapse of urban roads is endless
In recent years, urban road collapse accidents have occurred frequently. In some areas, there are even several road collapses in one day. Even if people walk on the “flat†road, they have to “step by stepâ€!
At 2 o'clock on the afternoon of November 3, at the intersection of Shigu Road and Tongsha Road, Xili, Nanshan District, Shenzhen, the road collapsed and the ground collapsed into a large pit. A mud truck almost fell into the pit.
(Image from the network)
On August 23, Lanzhou, the capital of Gansu Province, staged a "three-day collapse". Pedestrians, expectant mothers, cars and clay tankers fell into the pit.
On June 5, the pavement collapsed in front of a school in Nanning, Guangxi.
On May 21, a sudden collapse of a road surface in Ruijin City, Jiangxi Province caused four cars parked on the road to fall into the pit.
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The collapse of urban roads will not only cause traffic congestion, but also cause accidents that cause car crashes and cause huge social impact.
Ground Penetrating Radar Technology Effectively Prevents Collapse Accidents
Urban road collapse accidents are mainly caused by hidden dangers of roadbed diseases. With the development of the city, underground pipelines and subways in the lower part of the road are becoming more and more dense. Deep underground buildings such as underground parking lots around the road are also becoming denser. This brings unprecedented danger to the safety of the roadbed.
Ground Penetrating Radar is a non-destructive testing technology that can be safely used in urban roads. The working conditions are loose, there is no need to close the traffic, the adaptability is strong, the anti-interference ability is strong, and the detection precision and resolution are high. In particular, the three-dimensional ground penetrating radar technology based on antenna array technology can quickly detect and evaluate the roadbed of urban roads, timely grasp the distribution and extent of roadbed diseases, prevent the occurrence of malignant accidents such as road collapse, and become a kind of urban road collapse prevention. solution.
International leading technology Norway 3D-Radar 3D ground penetrating radar
Norway's 3D-Radar GeoScopeTM 3D Ground Penetrating Radar uses innovative frequency stepping radar technology and unique antenna array technology. The radar frequency sweep range is from 100MHz to 3GHz, which is completely set by the user according to different applications. Depth measurement can meet the requirements of high resolution. Compared with traditional radar (no carrier frequency pulse and frequency modulated continuous wave), this technology is mainly characterized by:
â— The frequency component of the radar signal source output can be precisely controlled, and the energy of each frequency component is equal;
â— By controlling the bandwidth of the signal emitted by the radar host, it can effectively suppress noise and improve sensitivity;
â— The radar signal is a frequency domain signal, which can be easily processed and analyzed by signal processing technology in the frequency domain.
Norway's 3D-Radar 3D Ground Penetrating Radar provides a technical platform for urban road managers to provide on-site data collection and data analysis. Municipal roads can be applied to:
â— Underground cavity detection report;
â— Depth report on pavement crack disease;
â— Evaluation of road medium density, water content, etc.;
â— Report on the thickness of the road structure;
â— Underground pipeline detection report;
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