Thai Government Addresses Ground Subsidence at Purple Line Construction Site

On August 8, 2026, the Thai government announced ongoing efforts to mitigate the impact of ground subsidence at the Wongwian Yai station, part of the Purple Line (Tao Poon–Rat Burana) extension project. According to Khaosod Online, Deputy Spokesperson for the Prime Minister’s Office Lalida Periwattana stated that Deputy Minister of Transport Siriphong Angkasakulkiat is overseeing the response, which prioritizes public safety and structural integrity.

Engineering teams have completed soil stabilization (grouting) at 40 locations, with approximately 80 additional points planned. This process is expected to take two to three months. Officials are continuously monitoring building and structural movement to assess site stability. Once stabilization is complete, authorities plan to drain water from the tunnel to inspect for leaks and determine necessary repair protocols. Traffic flow will be restored gradually as engineering assessments confirm the area is safe.

For residents and commuters in the Wongwian Yai area, this situation may result in localized traffic disruptions and ongoing construction activity. While the government emphasizes that safety is the primary concern, the exact timeline for full traffic restoration and the final repair schedule for the tunnel structure remain subject to ongoing technical evaluations. Further updates are expected as the stabilization work progresses.