The other day，The first round of general assembly and acceptance of the large steel girder section of the auxiliary branch channel bridge of Ma'anshan Yangtze River Highway and Railway Bridge on the new Chaohu-Ma'anshan Intercity Railway, which was constructed by China Railway Industry's China Railway Ninth Bridge, passed smoothly.。

Maanshan Yangtze River Rail-cum-Road Bridge is the control project of Chaozhou-Maanshan Intercity Railway.，From He County，It passes through the middle section of Jiangxinzhou，Arrive at Dangtu County。Chaoma Railway is adopted for the river-crossing section.+Reserved railway+Bridge Scheme for Multi-channel Construction of Urban Expressway，Total length 9.799 kilometers，The side approach bridge from Hexian County、Main branch channel bridge、Jiangxinzhou Approach Bridge、Auxiliary branch channel bridge and Dangtu side approach bridge, etc.。The auxiliary branch channel bridge is a steel truss girder cable-stayed bridge with double towers and three cable planes with a main span of 392 meters.，The total length is 840 meters，Three-piece main truss structure is adopted，Truss type is adopted“N”Shaped truss，In the main tower、Bridge portal frame shall be set at auxiliary pier and side pier.，Orthotropic integral steel deck is adopted for the upper deck of the main beam，The lower deck adopts the integral railway deck combined by box truss and plate truss.。The railway is on the roadEO-E7 Steel box structure is adopted between sections，In order to set the ballast concrete。China Railway No.9 Bridge mainly undertakes the auxiliary branch channel bridge of the bridge.CMSG-Lot 3:60 internodes and 33 segments in total, with a total weight of about 3.50,000-ton steel beam、Manufacturing and installation tasks of accessories。

The fabrication of the whole steel girder is divided into 10 rounds.。Steel truss beam member、Bridge deck、Longitudinal and transverse beams、Bridge Gantry、The processing and manufacturing of splice plates are completed in Jiujiang Base.，And then transported to the Nantong general assembly site by water for the main truss pieces、Bridge deck block、Assembly of bridge portal frame，After fabrication, transfer to the painting workshop for three-dimensional assembly of the whole section.，Finally, the 1600-ton gantry crane on the wharf of the general assembly site is used for the loading of large sections.，Transport by water to the bridge site。

There are 5 segments in the first round.，The total length of the segment is about 112m.，36 meters wide，High 16.8 meters，The total weight is about 5000 tons，From 35 blocks（Stringer）Composition。In order to ensure the smooth progress of the general assembly，The company is well organized，Plan ahead，Personnel organization and machinery configuration、Monitor the measurement、Construction safety and other aspects have been carefully arranged.：In terms of manufacturing，Manufacturing large special assembly jig frame，Establish a survey network，6 measuring points shall be arranged at the periphery of the jig assembly site.，The whole process of assembly shall be inspected with total station.，And utilize a variety of preset method、Procedures, etc，To ensure the stability of the truss in the standing position；In terms of welding，Organize welder examination，Operate in strict accordance with welding process standards，Maximum control of welding deformation，Ensure that the structural dimensions meet the requirements，High quality and high efficiency guarantee the manufacturing accuracy of steel beam、Manufacturing speed。

Chaoma Intercity Railway is a national railway.“Eight vertical and eight horizontal”The high-speed rail network is an important part of the Shanghai-Hanrong Expressway between Hefei and Shanghai.，It is also the first inter-city railway project jointly built by provinces and cities in Anhui Province.，North to Shanghai-Hefei-Hangzhou High-speed Railway，Donglian Sunan Intercity along the Yangtze River，It is a direct connection between Ma'anshan and Hefei, the provincial capital.，It is also a new high-speed rail channel from Anhui to Shanghai and other cities in the Yangtze River Delta.，To further improve the layout of regional high-speed railway network，Enhance the transport capacity of the corridor，Promote the integrated development of the Yangtze River Delta、The development strategy of the Yangtze River Economic Zone is of great significance.。（Xu Chuangxin and Wang Jun）Source：Anhui Economic Network