舟山与大陆联网大跨越工程施工关键技术

舟山与大陆联网螺头水道大跨越工程，是目前世界上规模最大的输电线路跨越工程。大跨越地处海岛甚至海中，地形位置狭小，施工条件恶劣；高塔基础型式多样，有海岛斜置式插入钢管基础，还有海中基础；370 m高塔结构复杂，高度高、尺寸大、直径大、重量大；跨越螺头水道国际航道，耐张段长、跨距大，航道通航流量大，大型船舶通行频繁。对舟山与大陆联网大跨越工程施工关键技术作了介绍，为类似输电线路大跨越工程施工提供良好的方法借鉴。

Key Construction Technologies of the Zhoushan Island-mainland Long Span Power Transmission Project

Zhoushan Island-mainland power transmission project over the Luotou international channel is the largest in span in the world.The transmission towers of the project are located on the island and in the sea respectively,where the construction site is small,and construction condition is poor.The tower foundations are varied in types,including oblique set-in tube foundation specially used for island and marine foundation.The 370-meter-high tower is complex in structure and large in height,size,diameter and weight.The project crosses the Luotou international navigation channel where the navigation is busy with large ships frequent,and has a very large strain segment and large span.The paper introduces the key construction technologies of the project,which can provide good experience for construction of similar large-span transmission projects.