A significant road collapse occurred on the evening of February 12 at the intersection of Qixin Road and Li'an Road in Shanghai's Minhang District. The site showed a large sunken area with substantial water accumulation, and nearby roads have been closed. The collapse is located within the construction zone of Section 18 of the Shanghai Jiamin Line regional rail transit project. The main contractor for this section is China Railway Tunnel Group Co., Ltd., a subsidiary of China Railway Group Limited (601390.SH). The project supervisor is Shanghai Puqiao Engineering Construction Management Co., Ltd. The contract was awarded at a value of approximately 466.3078 million yuan. When contacted for an update on repair efforts, a project representative declined to comment, stating that official announcements should be relied upon for information.
Earlier, on the evening of February 11, the project owner, Shanghai Shentie, issued a statement explaining that a localised water seepage incident had occurred around 10:30 AM on February 11 during construction at the receiving end of the right tunnel on the Qixin Road Station to Xinhjian Road Station section, which is being built by China Railway Tunnel Group. The on-site command center immediately activated emergency protocols and is addressing the seepage point. No casualties have been reported.
The project timeline for Section 18 of the Jiamin Line has been extended multiple times. A contract award notice from March 2022 indicated a planned construction period of 955 days for this section. However, a tender announcement released by the contractor in August 2024 mentioned a contract duration of 1005 days. By the end of 2025, an on-site construction plaque showed the start date as August 28, 2022, and the completion date revised to December 31, 2028, extending the total duration to 2317 days.
Shanghai Shentie had previously noted the project's technical challenges, stating that the "Shentui No. 2" shield boring machine needed to navigate beneath major municipal roads, underground pipelines, and various structures. The local geology, primarily comprising water-permeable soft soil and silty sand layers, demanded extremely high precision in controlling surface settlement and dynamically adjusting boring parameters. Challenges also included a sensitive surrounding environment and limited worksite space. The project team reportedly utilized intelligent construction systems to monitor geological changes, optimize techniques, and ensure safety, successfully limiting surface settlement to within 10 millimeters.
The Shanghai Jiamin Line is a key north-south arterial line in Shanghai's regional rail network. It spans 44.04 kilometers, passes through Jiading and Minhang districts, and includes 15 stations, with trains designed for a maximum speed of 160 km/h. The line is intended to connect key areas including Jiading New City, Hongqiao Transport Hub, and Minhang, forming an important part of the Yangtze River Delta rail network. Upon completion, it is expected to integrate with the regional airport line, alleviate congestion at the Hongqiao Hub, and serve as a new engine for economic growth in western Shanghai.
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