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Changchun Airport Expressway across the intercity railway overpass swivel success-iptd-651

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Changchun Airport Expressway across the intercity railway overpass "twist" Changchun City Airport Expressway project across the intercity railway overpass successfully completed the "twist in the air". Photography publicity Bridge Engineering in our province to fill a blank of municipal construction technology will effectively alleviate the traffic pressure in our city region in the eastern part of trunk road 17 at 2:10, as the key and difficulty of Changchun city airport expressway construction project, built in the Northeast tonnage swivel bridge – Airport Expressway across the intercity railway overpass swivel section in it took about 70 minutes after the successful completion of the "twist in the air", as of 10 at the end of the completion laid the foundation. Changchun evening news reporter learned that this is not only the largest swing bridge built in the northeast region, but also to fill the gaps in the construction technology of bridge engineering in our province municipal large span of synchronous double swivel. The airport expressway is expected at the end of 10 will be opened Changchun airport expressway project is the eastern part of the city economic zone to a part of the city trunk road connecting a Changchun Longjia Airport, South Changde Road and Harbin street intersection, north to a road and Airport Road intersection, the total length of 5.83 km, two-way eight lane design speed of 60 kilometers, started construction in August 15, 2014, is expected to be commissioned in October 30th. Cross the intercity railway overpass at about two, the construction unit in advance on both sides of the Railway Prestressed Concrete Bridge were taken form. The swivel pull grinding principle of single jack help battle 15 thousand and 300 ton, two more than 30 thousand tons of the bridge will be very heavy, how to complete the rotation? "We take the turntable between the first floor cap and the second floor caps, and carry out permanent consolidation after the clockwise turn to 57 degrees to the design position through the continuous jack device. China Railway ten Bureau eight company Changchun airport expressway engineering project department chief engineer Jiang Feng told the Changchun evening news reporter. Tongsudeshuo, on the beam under the cap is arranged between a shaft, called ball twist, "like pull grinding, through pre buried steel wire, and then use the jack pull on both sides of each other, traction, driven to rotate through the grinding force, so as to drive the whole beam body rotates, finally in place." Jiang Feng explained. The heaviest bridge body is about 70 minutes to complete the "air swivel". The whole turning time is 1 hours, 10 minutes, and all the bridge deck is completed. After that, it will not affect the railway. Jiang Feng said that the bridge length of 330 meters from the ground, the lowest 12 meters, the highest point 23 meters, no train running on the intercity rail at night, the pier under preset ball twist will be two pieces of North and South Bridge synchronous rotation, and parallel to the intercity rail by cross cross. With homework because near the existing high-speed rail line construction, and bridge across the intercity rail, to ensure the safety of existing railway and the Shenyang Railway Bureau, approved the operation time for the 17 day rotation at 30 to 4, and 1 hours for railway electric power lines and restore electricity, available time is only 2.5 hour, time is very tight. Through close cooperation with the City Project Construction Committee, the railway sector and the participation of all parties, on-site command and technical personnel to operate properly, accurate and practical in less than 1.5 hours on the successful completion of the swivel. At present, main part has finished construction, and the remaining 15 bridge span beam without a plan, before the end of the month – end." Jiang Feng said, Changchun City Airport Expressway is completed, the city will effectively ease the eastern regional trunk road East 3rd Ring Rd, Yangpu Avenue, Changji north line and Zhongshan Avenue traffic pressure, to improve the city road network structure, promote the benign development of regional traffic and transportation, logistics and capital attraction will play a positive role. Reporter Chen Qiong

长春机场快速路上跨长吉城际铁路立交桥“成功转体” 长春市机场快速路工程上跨长吉城际铁路立交桥顺利完成“空中转体”。摄影 张扬   填补我省市政桥梁工程一项施工技术空白 将有效缓解我市东部区域主干路交通压力   17日2点10分,作为长春市机场快速路建设项目的重点及难点,东北地区在建吨位最重转体桥――机场快速路上跨长吉城际铁路立交桥转体段,在历时约70分钟后顺利完成“空中转体”,为10月末建成通车奠定了基础。长春晚报记者了解到,这不仅是东北地区在建的最大转体桥,还填补了我省市政桥梁工程大跨径双幅同步转体施工技术的空白。   机场快速路预计10月末将通车   长春市机场快速路工程是一条连接我市东部经济带到长春龙嘉国际机场的城市主干路的一部分,南起常德路与哈尔滨大街交会处,北至甲一路与机场路交会处,全长5.83公里,双向八车道,设计时速60公里,2014年8月15日开工建设,预计10月30日建成通车。   跨长吉城际铁路立交桥分左右两幅,施工单位事先在铁路两侧分别采取预应力混凝土方式制作主桥。   转体利用拉磨原理 千斤顶上阵帮忙   单幅重达1.53万吨、双幅超过3万吨的桥体十分笨重,将如何完成转体呢?“我们采取之前在第一层承台与第二层承台间设置的转盘,通过连续千斤顶牵引装置逆时针转向约57度到设计位置后进行永久固结。”中铁十局八公司长春市机场快速路工程项目部总工程师姜峰告诉长春晚报记者。   通俗地说,在梁体上下承台之间设一个轴,学名叫球绞,“就像拉磨一样,通过提前预埋的钢线,然后利用千斤顶拉,两边互相牵引,通过拉力带动磨转动,从而带动整个梁体跟着旋转,最后就位。”姜峰解释说。   最重桥体约70分钟完成“空中转体”   “整个转体时间是1个小时零10分钟左右,所有的桥面全部施工完毕,转过去以后基本不会影响铁路。”姜峰介绍说,该转体桥全长330米,距离地面最低处12米、最高处23米,在长吉城际铁路夜间无列车运行时,通过桥墩下预置好的球绞将南北两幅桥体同步转体,与长吉城际铁路由平行转为上跨交叉。   转体作业因为临近既有高铁线路施工,且转体后上跨长吉城际铁路,要保证既有线及铁路行车安全,沈阳铁路局批复转体作业时间为17日零时30分至4时,并且其中1个小时用于铁路电力线路停电及恢复用电,可用时间仅为两个半小时,时间非常紧迫。经过市建委、铁路部门及参建各方的密切配合,现场指挥得当,技术人员操作精准,实际只用了不到1个半小时就顺利完成转体。   “目前,主梁部分已经施工完毕,剩下还有引桥的15跨梁没架,计划月底前把梁架完。”姜峰说,长春市机场快速路建成后,将有效缓解我市东部区域主干路东三环路、洋浦大街、长吉北线和中山大街的交通压力,对完善城市路网结构、促进交通的良性发展以及对区域交通、物流和资金的吸引都起到积极的作用。记者 陈琼相关的主题文章: