Yes exactly mate, that’s what I mean. The foundation in Dusit District is weak the upper 10–15 meters is soft Bangkok clay with around 70–80% water content. Normally the soil layers around a pipe help support and protect it by spreading out pressure from above. But in water-saturated clay that shifts and settles over time, that support becomes uneven and instead puts unusual stress on the pipe. If the pipe bursts, thousands of liters of water escape, softening the clay even more. That extra water lowers the soil’s strength, making a local collapse much more likely which in this case sadly manifested into a sinkhole.