论文部分内容阅读
临吉高速公路壶口黄河特大桥桥址区为山区峡谷地形,风环境极为复杂,而该桥桥墩墩高为特高墩,施工中长悬臂持续时间长,施工中可能遭遇的极端不利气候条件的概率较大,施工中面临的风险较大;为此在施工过程中采用了多种抗风稳定措施,如提前完成了左右幅墩顶系梁的施工,在1#墩主梁小里程悬臂端、4#墩主梁小里程悬臂端进行了安装了缆风绳、将左右幅主梁悬臂端翼板横向联系起来等工程措施,提高了桥梁在施工期间的稳定性能,顺利通过了冬歇期及后期施工期间河谷大风的考验,没有出现安全风险,整体应用情况良好,可为其他同类和类似条件下桥梁施工期间的抗风提供参考和借鉴。
Lingjiu Expressway Hukou Yellow River Bridge is a canyon topography of mountainous terrain, the wind environment is extremely complex, and the bridge piers high piers, long cantilever construction duration of the construction may encounter extreme adverse weather conditions The greater the probability of construction, the construction is facing a greater risk; for this reason in the construction process using a variety of wind stability measures, such as the completion of the left and right web pier roof beam construction, in the 1 # pier girder cantilever End, 4 # pier girder cantilever end of the cantilever installed cable ropes, left and right width of the cantilever end of the main wing panels and other engineering measures to improve the stability of the bridge during construction, successfully passed the winter break During the period and in the later period, the gale of river valley during the construction period shows no safety risk and the overall application is good. It can provide references for wind resistance during bridge construction under other similar and similar conditions.