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解惑“抜萝卜痛又叫黄”-环球时报

四川乐西高速乐山抜萝卜痛又叫黄至马边段开通试运营

来源: 河南日报
2024-12-29 19:49:40

最佳回答

“抜萝卜痛又叫黄”四川乐西高速乐山抜萝卜痛又叫黄至马边段开通试运营

  中新抜萝卜痛又叫黄网乐山12月27日电 抜萝卜痛又叫黄(记者 刘忠俊)12月27日下午,四川乐山至西昌高速公路(以下简称“乐西高速”)沙湾枢纽至武圣枢纽段正式开通试运营,标志着乐山至马边段(以下简称“乐马段”)通车。

乐西高速乐马段马边河大桥。记者 刘忠俊 摄

  据了解,乐西高速乐马段起于乐山市西侧冷山互通接乐雅高速公路,经罗汉、沙湾、黄丹、舟坝,止于仁沐新高速公路马边支线武圣枢纽互通,经马边支线接乐西高速马边至昭觉段,全长约84.1公里,采用双向四车道高速公路标准建设,桥隧比为42.4%。“SG5标起于山庄村大桥,止于武圣互通,长约8.194公里,含7座桥梁、2座隧道、5段路基、1座枢纽互通及977片箱梁和T梁制运架任务。”中铁八局乐西高速SG5标项目经理孙龙称,建设过程中,最难的就是武圣枢纽互通C匝道桥小曲线半径架梁作业,具有平面曲线半径小、纵横坡大、桥面宽度窄、桥墩高等特点和困难。

干净明亮的乐西高速乐马段隧道。记者 刘忠俊 摄

  乐西高速乐马段所处区域地层软弱,从地质构造发育看,属于地质灾害易发、多发区,沿线不良地质主要有滑坡、顺层、采空区、岩溶、崩坡积体、危岩落石等。复杂的地形地质条件与互通立交、桥梁隧道等重点工程相互叠加,大大增加了项目建设难度。其中,武圣枢纽互通C匝道大桥位于高陡边坡地段、地质条件差、桥墩高、场地狭窄、跨越河沟和地方道路,不便采用支架现浇和大型吊车吊装施工。“这样条件下采用常规公路架桥机架梁,将面临架桥机无法过孔、运梁车无法喂梁、边梁难以就位等难题。”孙龙表示,最终对适用300米曲线半径的180单导梁架桥机进行了多部位适应性改造,成功解决了存在的施工难题,保障了安全性、降低了成本投入。“全国首例40米跨度T梁在曲线半径130米线路上成功架设,填补了大跨度结构在小半径曲线段上的国内施工空白。”

  当日,记者开车从武圣枢纽进入乐西高速乐马段,沿途隧道光线明亮,部分路段洒水车和工作人员正忙着清扫路面、完善道路标识等工作。走进沙湾服务区,超市、餐厅、卫生间、加油站和充电站等均已建好,并为过往游客设置了打卡标志。

通车仪式现场。记者 刘忠俊 摄

  乐山至马边段沙湾枢纽至武圣枢纽段开通试运营,同步还开通了罗汉、高新、踏水、福禄、黄丹、舟坝收费站及沙湾服务区。试运营期间,小客车道限速每小时100公里,客货车道限速每小时80公里。同时,踏水收费站外连接线因高压线路高度限制,通行踏水收费站的车辆限高3.5米。

  据悉,乐西高速公路是四川高速路网8条纵线中的第7纵,也是首条深入大小凉山腹地的全天候交通大通道。通车后,将强化成都平原经济区对攀西经济区的辐射带动,对促进民族地区经济发展具有重要意义。(完)

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