Material and trade company of China Railway No.1 Engineering Group Co., Ltd. contracting the main body of 128 meter steel tube arch of Jinzhong super large bridge of Taijiao Railway

On November 28, with the slow fall and accurate positioning of the last closure section, the 128 meter simply supported steel tube arch bridge of Jinzhong super large bridge of Taiyuan Jiaozuo railway project contracted by the engineering machinery plant of China Railway First Bureau material and Trade Co., Ltd. was successfully closed, which marked a stage breakthrough in the construction of the project and created another favorable condition for the early opening of the project. As a key project of Taiyuan Jiaozuo railway, the

bridge started to install the support on November 1, 2019, the first section on November 7, and the last main arch beam on November 28. After 28 days, the closure was realized, 2 days ahead of the original schedule. The main bridge structure of the bridge is a 128 m Nielsen system simply supported arch bridge with ballasted track. The calculated span is 128M. There are 26 arch rib hoisting sections in total. The arch rib adopts catenary. The arch rib inclines 8 degrees inward in the transverse bridge in the form of basket. The cross section of the arch rib adopts dumbbell shaped concrete filled steel tube with equal cross section. Stiffeners are set in the circular steel tube at each interval, and tie rods are welded in the two webs.

is faced with the objective reality of tight construction period, multiple potential risk factors, multi-point and multi-faceted simultaneous construction. The engineering machinery plant of the company divides the task period into several sections for objective management, decomposes the objectives according to the structural progress stage of the construction project, formulates a detailed special construction scheme, establishes an organization system for progress control, and holds the "key line" to be reasonable Dispatch personnel and command team shall be allocated, coordination and service of construction site shall be strengthened, personnel, materials and equipment required for production shall be allocated in time to meet production and construction needs, and continuous construction operation shall be ensured, so as to achieve effective connection in planning, organization and management, process monitoring, etc.

it is reported that after the main arch beam of the 128 meter steel tube arch bridge of Jinzhong super large bridge of Taijiao railway is closed, the next stage will fully enter the process of deck pavement, painting, handrail installation, etc. (correspondent Chen Huimin and Yu Yongjiang)