Xihoumen Railway-Highway Dual-Use Bridge (西堠门公铁两用大桥) – Under Construction

Project Name

Xihoumen Railway-Highway Dual-Use Bridge (西堠门公铁两用大桥)

Location

Also spans the Xihoumen Strait, connecting Jintang Island and Cezi Island in Zhoushan, Zhejiang Province .

Function

A dual-purpose bridge carrying both the Ningbo-Zhoushan Railway and the Yongzhou Expressway’s second line. It is a critical control project for the railway connection to Zhoushan .

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Key Specs
  • Type: Cable-stayed-suspension collaborative system bridge; world’s largest span for a road-rail dual-use bridge .
  • Main Span: 1,488 meters .
  • Total Length: 3,118 meters .
  • Width: 68 meters at the deck (world’s widest sea-crossing bridge), with a highway-railway same-level design .
  • Towers: 294 meters high (world’s tallest sea bridge towers) .
  • World Records: Largest span for a road-rail dual-use bridge; largest span for a cable-stayed-suspension collaborative system bridge; world’s widest sea-crossing bridge .
Construction & Investment Entities
  • Investment Lead: China Railway (Shanghai) Investment Group Co., Ltd. (中铁上投) .
  • Design: China Railway Major Bridge Reconnaissance & Design Institute (中铁大桥院) and China Railway Siyuan Survey and Design Group (中铁四院) .
  • Construction: China Railway Major Bridge Engineering Group (中铁大桥局) and China Railway No.4 Engineering Group (中铁四局) are involved in different sections .
  • Construction Management: Shanghai-Hangzhou Passenger Dedicated Line Co., Ltd. (沪杭客专公司) .
Project Status (as of mid-2026)

Both main towers were topped out in July 2026, marking the completion of the main structural work. Steel box girder erection is underway. The project is on schedule .

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