The dramatic cave-in occurred just one day after officials had described problems at the same site as a “localized water leak.”
From Warning Signs to Collapse
The first signs of trouble emerged around 10:30 a.m. on Feb. 11, when construction crews encountered water leakage during tunneling work, according to a statement from the project’s state-backed developer. Officials said an emergency response was activated and nearby roads were temporarily closed.By the next morning, however, the situation had escalated.
Video footage showed the pavement collapsing rapidly, with part of a temporary construction structure slipping into the sinkhole. Water appeared to gush from ruptured underground pipes as dust filled the air.
Later that day, transportation authorities confirmed the collapse occurred in the same section where leakage had been reported the previous day. The site had already been sealed off, they said, reiterating that no casualties were reported.
A Multibillion-Dollar State Project
The collapse occurred within a $65 million construction contract that is part of a much larger $5 billion regional rail expansion.It’s being built by China Railway Tunnel Group, a subsidiary of the state-owned China Railway Group.
The 27-mile line, roughly the distance from downtown Manhattan to Newark Airport, will include 15 stations. It is intended to serve as a major north-south transit corridor linking residential districts, business centers, and a major international airport in one of China’s largest metropolitan regions.
Expert: Water Intrusion May Have Triggered Chain Reaction
A Shanghai-based engineer who previously worked on subway construction projects told The Epoch Times’ Chinese-language edition that the collapse likely began underground.He said water may have seeped through gaps in the concrete tunnel lining during excavation. If sealing fails, groundwater can erode surrounding soil, gradually hollowing out space above the tunnel.
“At first, the ground can hold,” he said. “But once enough soil is washed away, it gives way suddenly.”
He added that the absence of reported injuries suggests crews may have detected warning signs before the collapse and restricted access to the area.
Still, he cautioned that uncontrolled water inflow can pose broader structural risks. If large volumes of water move along the tunnel alignment, it could affect more than just the immediate collapse zone.
The engineer also pointed to the pressures of large infrastructure projects, where tight timelines can complicate quality control.
“Sometimes deadlines matter more than anything else,” he said. “If earlier stages are delayed, later construction windows shrink.”
He further criticized what he described as limits on public discussion of such incidents, saying media coverage is often brief and tightly managed.
Growing Online Criticism
As of publication, authorities had not released a detailed technical explanation for the collapse, and project contractors declined to comment beyond official statements.In the absence of new details, skepticism spread quickly online.
Others focused on the city’s geology, pointing to its soft, water-rich soil and arguing that deep underground construction carries inherent risks. “It was never ideal for deep excavation,” one user wrote.
The debate extended beyond technical concerns.
On X, the large road collapse sparked broader criticism. “Shanghai? Even China’s showcase city has this problem?” one post read.
Several commenters framed the incident as a regulatory failure, accusing oversight bodies of prioritizing image over transparency. “This is what happens when oversight agencies don’t fully do their jobs,” one widely shared post said.
The area has experienced similar problems before.