论文部分内容阅读
针对吊索锚管孔径小的双塔单跨平面主缆自锚式悬索桥,通过有限元仿真,搜寻并提出了先按由跨中向两侧张拉跨中少部分吊索,然后按由主塔向跨中的顺序张拉剩余吊索的最优体系转换方案,成功地解决了该类型桥梁吊索锚管内径过小的问题。在此过程中,分析了双塔自锚式悬索桥纵桥向须基本对称或两边跨主缆倾角须基本相等的原因,并结合定性分析及定量计算,论证了上述方案为该类型桥梁最优体系转换方案的必然性。该文背景工程按照该方案进行吊索张拉施工,快速地完成了体系转换,全过程中未出现吊索在其锚固导管口弯折的情况,达到了预期的理想效果。
Aiming at the double-tower single-span plane main cable self-anchored suspension bridge with small diameter of anchor pipe, through the finite element simulation, the paper searches and puts forward that firstly, The optimal system conversion scheme of stretching the remaining slings in the order of tower to span successfully solved the problem that the inner diameter of the anchor pipe of this type of bridge is too small. In this process, the reason why the longitudinal bridge must be basically symmetrical or the dip angles between the two sides of the main tower of the double-tower self-anchored suspension bridge should be basically equal. Combined with qualitative analysis and quantitative calculation, the above scheme is proved to be the optimal system for this type of bridge Necessity of conversion plan. According to the program, the background construction of the project is carried out by the cable tensioning construction, and the system conversion is completed quickly. No slings are bent at the anchorage catheter opening during the whole process, and the expected ideal effect is achieved.