Namyangju City Achieves Complete Prevention of Sinkholes
Namyangju City in Gyeonggi Province announced on December 23 that it had completed rapid restoration after discovering 26 underground cavities through ground penetrating radar (GPR) exploration conducted over a 50-kilometer section of areas vulnerable to ground subsidence since October.
This ground survey was carried out as a project funded by 65 million won in national and provincial government support. The city focused its inspections on areas surrounding aging water and sewage pipelines, as well as sections with heavy traffic.
The underground cavities detected during the survey were found to be caused by factors such as soil erosion beneath roads or insufficient compaction during road paving. Most of the cavities were small in scale, but some sections were analyzed to have the potential to lead to ground subsidence.
Previously, the city had conducted an emergency survey on 15 areas at risk of ground subsidence in the first half of the year through the National Land Safety Management Agency's ground survey support project. The current GPR survey was carried out by selecting 35 damaged road sections based on demand surveys from underground facility management agencies and analysis by service providers. As a result of detailed analysis, 26 underground cavities were quickly restored.
Namyangju City Takes the Lead in Sinkhole Prevention, Detects 26 Underground Cavities through Ground Penetrating Radar (GPR) Survey for Proactive Response. Provided by Namyangju City
Namyangju City plans to conduct further detailed investigations and implement additional reinforcement work in phases for certain high-risk ground areas identified in this survey. In addition, the city intends to expand GPR exploration to aging sewage pipelines and major roads in 2026.
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