外包式钢桁架-混凝土组合设备基础

Equipment Foundation of Steel Truss-Concrete Composite Structure

传统意义上的钢桁架-混凝土组合结构,是钢桁架位于混凝土板之下,考虑混凝土板对钢桁架受力性能的贡献。这种传统的钢桁架-混凝土组合结构,可以定义为下置式钢桁架-混凝土组合结构。本文介绍在设备基础中成功应用的钢桁架外包混凝土板结构,即钢桁架上下弦位于块体式混凝土设备基础上下表面,这是一种全新的组合结构形式。为区别起见,暂定名外包式钢桁架-混凝土组合结构,因其在设备基础中应用,而称之为外包式钢桁架-混凝土组合设备基础。与传统概念的钢桁架-混凝土组合结构不同的是,该结构的基本特点是钢桁架夹混凝土梁,在技术上是一个创新。外包式钢桁架-混凝土组合设备基础已有大量应用于设备基础工程中的报道,取得了良好的经济效益。本文扼要介绍这种设备基础从施工工艺发展和开发的历程,以及施工方法、受力特点和计算方法。本文对这种新结构的应用前景予以展望。

The paper describes the application of a new type of equipment foundation made of steel truss-concrete composite beam structure, in which the steel truss is concreted and both top chord and bottom chord of steel truss are on the level of the top and bottom surfaces of the concrete plate, that is, concrete beam is between steel trusses. It is different from the traditional steel truss-concrete composite beam structure, in which the steel truss is under the concrete plate. The paper also gives out the development of the construction technology, the construction method, mechanical properties, analysis method and application prospect of this equipment foundation.