The incident Saturday killed one worker and was an embarrassment for Shanghai’s leaders as they prepare to showcase the city, one of China’s wealthiest and most modern, during the 2010 World Expo.
Elsewhere, one man died after part of a bridge in northeastern China caved in early Monday, sending eight vehicles plunging into the river below.
China’s construction sector has long been plagued with quality problems. Thousands of students died when schools collapsed during last year’s earthquake in Sichuan province, raising complaints from parents and others who accused builders of cutting corners to boost profits.
Collapsing bridges, highways and buildings in China have often been linked to endemic corruption, as officials and contractors skimp on construction materials or issue approvals without proper inspections.