新雅江大桥钢栈桥及钢平台的设计与施工工艺技术

DESIGN AND CONSTRUCTION TECHNOLOGY OF STEEL TRESTLE AND STEEL PLATFORM OF NEW YAJIANG BRIDGE

伴随我国基建领域以及交通网络的不断推进及发展,地形复杂的偏远地区成为桥梁建设工作的重点难点,其中钢栈桥、钢平台作为桥梁水上水下施工的关键技术,在大型跨江桥梁建设工程中到了广泛应用。桥钢栈平台可对土层实现很大的穿透力,但在浅覆盖层河床且入岩后硬度大的情况下难以获得较深的嵌入厚度。本文以新雅江大桥作为案例,对钢平台的搭建和钢栈桥在水中桥梁施工中的设计验算与施工工艺技术进行分析。

With the continuous promotion and development of China’s capital construction field and transportation network,remote areas with complex terrain have become the key and difficult points of bridge construction,among which steel trestle and steel platform,as the key technologies of bridge underwater construction,have been widely used in the construction of large river crossing bridges.The bridge steel stack platform can achieve great penetration to the soil layer,but it is difficult to obtain a deeper embedded thickness in the case of shallow overburden riverbed and large hardness after entering the rock.This paper takes the New Yajiang Bridge as a case to analyze the construction of steel platforms and the design checking and construction technology of steel trestles in the construction of bridges under water.