The bridge is located in the reservoir area of Sanmenxia Water Control Project, with a total length of 5663.754 meters (combined length of public railways 1.762.733 meters), in which the structural steel truss beam on the upper part of the main bridge1.654,38+0.40 meters is adopted, and the scheme of 1.08 meters 9-span and 2-span continuous steel truss composite beam is adopted.
bridgework
Survey and design
Sanmenxia Yellow River Highway-Railway Bridge is a bridge across the Yellow River between the proposed Yunsan Railway and the proposed Yunsan Expressway. The bridge site is 8.4 kilometers upstream of Sanmenxia Yellow River Highway Bridge, 28.9 kilometers away from the dam site of Sanmenxia Water Control Project, with a total length of 5.6 kilometers.
The main bridge of Sanmenxia Yellow River Highway-Railway Bridge adopts (84+9× 108+84)m continuous steel truss composite beam structure, the main beam is dead load 1030kN/m, the pier height is 60~72m, the peak acceleration of horizontal ground motion in the bridge site area is 0. 18g, and the site category is Class III. In order to achieve the seismic fortification goal, hyperboloid spherical isolation bearings are used at the top of the main pier, with a center distance of 7m and a friction coefficient of 0.03. The finite element model of the whole bridge is established by MIDAS Civil software for seismic dynamic analysis, and the pier and foundation are checked according to the analysis results. The checking results show that the main structure remains in the elastic working range under the design earthquake. Under the rare earthquake, the pier bottom may enter the plastic yield stage, and the pier column is designed as a ductile member. According to the seismic dynamic analysis and checking results of piers and foundations, it is determined that the horizontal bearing capacity of shear bolts of hyperboloid bearings should be designed according to the response value of 1.4 times of frequent earthquakes.
The main part of sth.
Sanmenxia Yellow River Highway-Railway Bridge is also a sports car, and the address is unknown. Above it is the Three Gorges-Xichuan Expressway, and below it is the Yunsan Railway. The total length of the main bridge is 5663.754m (total length of roads and railways1762.733m), in which the total length of the structural steel truss beam at the upper part of the main bridge is1140m. The pier is a portal hollow pier, totaling 12, with the highest pier column of 72m；; The pile foundation is bored pile, with variable diameter piles of 2.3m-2m and the longest pile length of 98m, totaling 456 piles, totaling 4 1872m.
The main bridge adopts the cross-section scheme of upper and lower steel truss beams arranged by public railways, with roads above and railways below; The railway is a four-lane railway and the highway is a two-way six-lane expressway. After the highway leaves the main bridge, a horizontal curve is set to bend out and gradually separate from the railway. The Yun-San Railway is also gradually separated from the Meng Xi Passage on both sides of the Taiwan Strait by using the horizontal curve.
work progress
20 15
On October 28th, 2065438+0510/KLOC-0, the Meng Xi Railway Sanmenxia Yellow River Highway-Railway Bridge Trestle Project undertaken by China Railway Construction Bridge Engineering Bureau Group was under intense construction.
On February 6th, 20 15, with the drilling of the first bored pile, the Sanmenxia Yellow River Highway-Railway Bridge designed by China Railway Bridge Institute officially started construction.
The first bored pile of Sanmenxia Yellow River Highway-Railway Bridge on Hua Meng Railway was successfully poured in 3 hours 10 minute on February 5, 2005, which marked that the bridge entered the substantive construction stage.
20 16
At 4: 30am on 20 16 65438+ 10/3, the first pile of the main bridge of Sanmenxia Yellow River Highway-Railway Bridge on Hua Meng Railway was successfully poured, which marked the official start of another major bridge project of our group. The pile foundation successfully poured this time is pier 10. Pouring began on 12 18, and was completed at 4: 30 am on 13, lasting 8 hours.
2065438+On March 3rd, 2006, Zhang Mei, chairman and general manager of Hua Meng Railway Company, deputy general manager and director of Jinyu Command, and inspection team of Hua Meng Railway Company, accompanied by Xu Lanmin, general manager of China Railway Construction Bridge Engineering Bureau Group, Zhou Xing, deputy general manager of Hua Meng Railway Project Command of Bridge Engineering Bureau Group Company and the third work area of Hua Meng Railway Project of the four companies, inspected the Huameng Railway Project 13.
2065438+21April 2006, Gao Yulan, chief engineer of Shanxi Provincial Department of Transportation, and Guo Xiaojun, deputy director of Comprehensive Planning Department, investigated the investment split of Sanmenxia Yellow River Highway-Railway Bridge. Gao Yulan took a bus from the south bank of the Yellow River, passed the bridge construction trestle, and went to the design boundary pillar of the bridge and the Yunsan connecting line for on-the-spot inspection. Subsequently, he held working talks with Henan investors and the heads of Hua Meng Railway Company, and had an in-depth exchange of views.
2065438+On May 6th, 2006, at the construction site of Sanmenxia Yellow River Highway-Railway Dual-purpose Bridge on Hua Meng Railway, there were many tower cranes and the sound of machines rumbled. The builders of China Railway Bridge Construction Bureau Group Co., Ltd., the construction unit, are working hard.
2065438+On May 3rd, 2006, Xue Songgui, member of the Party Committee and deputy director of the Yellow River Committee, and Zhu Guangshe, director of the Yellow River Defense General Safety Supervision Bureau, led the Shanxi inspection team, accompanied by Niu and Vice Mayor of Sanmenxia City, to inspect the flood prevention preparations in Sanmenxia City. The inspection team successively inspected the flood control work of Sanmenxia Yellow River Highway-Railway Bridge in Hua Meng Railway and the bank protection project in Hou Di, lingbao city, listened to the report on flood control and flood season preparation, learned about the storage and management of flood control materials, and put forward specific opinions on the existing problems.
On June 20th, 20 16, Shi Daoquan, Chairman of China Railway Construction Trade Union, came to China Railway Construction Bridge Engineering Bureau Group Co., Ltd. to inspect and guide the work of the trade union together with Li Rui, Minister of Comprehensive Production Department, Gu Chuanzhi, Minister of Organizational Rights and Women Workers Department, and Li Zhiwei, Director of Comprehensive Production Department. Chairman Shi and his party came to the construction site of Sanmenxia Yellow River Highway-Railway Bridge to check the construction and production situation with the commander of the company's Jinyu Branch. Dean Shi deeply understood the construction of bored piles in the main bridge of the Yellow River Bridge, and inquired about labor protection and heatstroke prevention and cooling measures in detail. As of June 22nd, the North Approach Bridge of Sanmenxia Yellow River Highway-Railway Bridge has completed 5 bored piles10, and 5 foundation pits of pile caps have been excavated.
At 0: 35 on September 25th, 20 16, after 10 hours of continuous intense construction, the first bid section of Sanmenxia Yellow River highway-railway dual-purpose bridge1/pier, which was undertaken by Hua Meng Railway Project Department, the fourth company of China Railway Construction Bridge Bureau, was completed. This is the first pier of the main bridge in the pipe section of Hua Meng Railway Project Department of China Railway Construction Bridge Bureau, which indicates that the bridge construction has achieved phased results since the start of construction and laid a solid foundation for the next structural construction of the main bridge.
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