导粱又称鼻梁。用拖拉法或顶推法架梁时,装于梁前(后)端的临时辅助结构。是为保证梁在移动时的纵向抗倾覆稳定性,以及减少梁的悬伸长度从而降低安装应力,常在梁的前(后)端用拆装式杆件、桁架纵梁或旧钢梁的杆件等加拼的一段小梁,其高度比正梁小,其长度要根据拖拉或顶推过程中的稳定性要求和梁的安装应力不超过设计值决定。
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本文提出了高低支腿龙门吊宽幅双导梁法这种新的桥梁工程施工方法。
A new technique is put forward that high-low brace gantry crane wide double guiding girder method to construct bridge.
该机采用连续双导梁的结构形式,作业程序简单,安全可靠,对环境适应性强。
The machine uses continuous double guide beams, it is safe and simple to operate, and has a better adaptability to environment.
采用SAP5计算程序,对某架桥导梁实例计算,其计算结果与实测结果相符。
A guiding beam as an example is calculated by program of SAP5, both the calculating and practical results are coincide.
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