摘要
大节段吊装施工的自锚式悬索桥钢箱梁的实际变形与理论值存在偏差,线形偏差呈波浪状,通过后期吊索力和桥面铺装的方法均难以调整,有时得不偿失。通过研究提出对首段大节段钢箱梁进行预架设的方式,模拟钢箱梁从制造拼装时的无应力状态到架设后简支应力状态,可实测得到桥位实际架设的线形、受力和节段匹配关系。由实测数据可预测和修正后续梁段的无应力拼装线形,通过预先调整改善钢箱梁线形,同时避免了较多的现场高空作业,有效提高了钢箱梁大节段间拼接的质量和进度。
Through the research, this paper put forward the pre-erection way for the first section of large segment steel box beam. It also simulated the steel box beam from the manufacturing assembly without stress to the simply-supported stress state after the erection, which could be measured to get the relationship between the alignment, the force and the segment matching of the bridge actual erection. Through the measured data, it also predicted and corrected the non stress assembly line of the follow-up beam segment. Through the pre adjustment to improve steel box beam alignment, it could avoid the more field aerial work, which effectively improved the quality and progress of steel box beam between the large segment splice.
出处
《山西交通科技》
2016年第3期63-66,共4页
Shanxi Science & Technology of Transportation
关键词
大节段吊装
自锚式悬索桥
钢箱梁线形
预架设
large segment hoisting
self-anchored suspension bridge
steel box beam alignment
pre-erection
