Five-hundred-ton steel box gird sliding span high-speed

November fourteenth，Heng in Hunan Province（Yang）Yong（State）Expressway Sitangchong Hub InterchangeCRamp，The total length is 56 meters、The steel box girder with a total weight of 500 tons slides smoothly and linearly at a speed of 20 to 30 centimeters per second.，“Cross”Cross Xuguang Expressway，Arrive at the designated landing point。During construction，Two-way traffic flow of Xuguang Expressway，Passage is not affected。

It is reported that，Successful Implementation of Hydraulic Sliding Straight Line Incremental Launching Method for Steel Box Girder in Small Radius Curve Section of Hengyong Expressway，It is the first time in the domestic highway industry.。In the early stage of construction operation，The project department first set up temporary piers on both sides of the existing Xuguang Expressway.，Set the sliding rail，A pushing slip system is for by that sliding shoe and the rail，The main body of the steel box girder and the steel guide girder are translated and positioned under the push of the hydraulic pushing system。Hydraulic Sliding Linear Incremental Launching Method is creatively used in curved steel box girder with small radiu“Curve straight top”，So that that stress of the steel box girder is more direct，Simpler than walking push，The local stability and structural safety of the steel box girder are effectively guaranteed.。

In actual operation，The project department adjusts the hydraulic system.，Strictly control the starting、The rate of braking，Realizing the synchronous action of the self-locking hydraulic crawler、Load balancing、Posture correction，Ensure the safety and controllability of the construction process。

Displayed by technical detection，All load bearing in the pushing construction process、Balance and other data meet the design and structural requirements.。Secretary of the Party Committee of Hunan Hengyong Expressway Construction and Development Co., Ltd.、Chairman He Liang said，This scheme has solved the problem of occupying pavement construction over the existing expressway.，The safety risk of traffic control is reduced to the greatest extent.，The construction period is further shortened，And has great popularization and application value.。

It is understood that，Hengyong Expressway is in Hunan Province.“Seven vertical lines and nine horizontal lines”Densification of Highway Network Planning，It starts from Yumushan Town, Zhengxiang District, Hengyang City.，The starting point is connected to Xuguang Expressway.，Stop at Maping Village, Lengshuitan District, Yongzhou City，Intersection with Erguang Expressway。The project is about 106 kilometers long.，Estimated investment 148.4.3 billion yuan，It is planned to open to traffic in 2024.。

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