沪苏通长江大桥主塔钢锚梁定位技术

在斜拉桥梁中,钢锚梁是一种连接斜拉索和主塔的构件,它层层设置于塔柱中,斜拉索穿过索道管后锚固在钢锚梁上.沪苏通长江大桥主塔远离岸边,具有跨度大、塔高、平面尺寸大等特点.现介绍在大风、日照温度变化、塔柱扭转变形、施工环境复杂等不利条件下,进行钢锚梁的精确定位的方法和技术.其成果可对其他类似斜拉桥钢锚梁的定位起到指导和借鉴作用.

Positioning Technology of Steel Anchor Beam of Main Tower of Shanghai-Suzhou-Nantong Yangtze River Bridge

For cable-stayed bridges, steel anchor beam is a component connecting cable and main tower. It is arranged in the tower column layer by layer. The stay cable is anchored to the steel anchor beam after passing through the conduit pipe. The main tower of Shanghai-Suzhou-Nantong Yangtze River Bridge is far from the shore and is characteristic with large span, high tower and big plane size. Introduced in this paper are the method and technology of accurate positioning of steel anchor beam under the adverse conditions of strong wind, sunshine temperature change, tower torsion deformation, complex construction environment, etc. The research results can be used for reference to other similar cable-stayed bridges.