Cement loss halts emergency repairs
Bangkok is once again battling a dramatic infrastructure crisis after urgent repairs to the giant sinkhole on Samsen Road were abruptly halted. Governor Chadchart Sittipunt confirmed on Friday that overnight, 1,500 tonnes of cement — around 700 cubic metres — were poured into the cavity to stem the flow of soil.
Yet engineers discovered a large portion of the concrete had seeped into the underground Mass Rapid Transit tunnel beneath the road. ‘The concreting was immediately suspended,’ Chadchart told reporters. Officials must now wait for the first layer to harden before resuming work, with an estimated 2,400 tonnes — or 1,000 cubic metres — still required to build a permanent retaining wall.
Fresh landslide sparks safety fears
Although the sinkhole itself remains stable, the situation took another alarming turn overnight when a 50-centimetre landslip occurred close to the site. No further damage or injuries were reported, but concern is mounting for the structural safety of nearby buildings.
The Samsen Metropolitan Police Station and adjacent residential blocks remain cordoned off. Experts from Kasetsart and Chulalongkorn Universities have installed additional monitoring devices to track vibrations and potential shifts. The police station is considered especially vulnerable because it lacks a retaining wall.
Contrast with hospital safety
In stark contrast, the Vachira Hospital has resumed outpatient services at its Tipangorn Rasamichote building. Engineers note the hospital is far more secure thanks to its deep foundation piles and a retaining wall located six metres from the collapse zone.
Investigators sent into the MRT tunnel reported a 30-square-metre breach in its wall. The landslip also trapped two police vehicles — a tow truck and a private car — inside the lower levels of the station. These will remain inaccessible until the repair phase is complete.
Rain and traffic chaos
The looming threat of rain adds further danger. With a 70 per cent chance of storms forecast across Bangkok, particularly in eastern districts such as Min Buri and Nong Chok, city officials have scrambled to deploy flood defences at the sinkhole.
Four high-powered pumps and sandbag barriers are in place to prevent water from flooding the excavation. Despite fears of disruption, morning traffic across key arteries such as the Krung Thon Bridge was reported as heavy but moving, with diversions around the closed section of Samsen Road easing congestion.
MRT pledges recovery and replacements
The Mass Rapid Transit Authority of Thailand has reassured residents that once repair operations are complete, the trapped vehicles will be removed safely. To ease public anger, the MRTA confirmed owners of the damaged vehicles will receive brand new replacements.
The wider question remains whether the city’s crisis management is sufficient to protect residents and infrastructure. With rainfall looming and repairs delayed, Bangkok faces days of uncertainty as it struggles to stabilise one of its busiest thoroughfares.
Your opinion counts
The repair of Bangkok’s Samsen Road sinkhole has been thrown into disarray after 1,500 tonnes of cement drained into the MRT tunnel. While the cavity appears stable, concerns remain over the police station and nearby housing blocks. Should authorities invest more in preventive building inspections to avoid such costly crises in the future?