■ Project name: Inner Mongolia Shangdu No.2 Power Generation Co., Ltd. Phase III coal yard closed steel structure project;

■ Project location: Dundahaote Town, Zhenglan Banner, Xilin Gol League, Inner Mongolia Autonomous Region;

■ Structure type: prestressed pipe truss structure;

■ Project Description: The main steel structure is a prestressed pipe truss with three longitudinal axes, axis A\C is the axis of truss column foot, axis C is the axis of middle column, and the lower end is a fixed hinge support; The structure has a single arch and two spans, with a single arch span of 254m, a structural span of 186m+68m, a longitudinal span of 176m and a top elevation of 54.2 m; There are 12 main trusses and 95 secondary trusses; The specifications of the bars are between Φ 76x4 and Φ 500x25, and all of them are made of Q355C；. The main cable type of the string cable is D64, and the roof cables are D30 and D42. The cables are made of hot extruded polyethylene (double PE sheathing) high-strength steel cables.

■ Construction method: The hoisting method of "assembling parts+closing in the air+moving the jig frame" is adopted.