Large-span truss anti-settlement installation construction technology

The invention relates to the technical field of steel truss construction, in particular to a large-span truss anti-sedimentation installation construction technology which comprises the following steps that 2N fixed temporary supports are arranged; the construction steel bar main body is assembled by a plurality of trusses, and each truss is hoisted by 2N + 1 sections; during hoisting, hoisting is conducted from the two sides to the middle in sequence, and welding is conducted immediately after each section of truss is hoisted in place; the method comprises the following steps: firstly, unhooking a lifting hook of a crane of the middle section of truss, carrying out first unloading, and mounting a secondary truss between the truss being hoisted and the previous truss; the temporary supports are sequentially dismantled from the middle to the two sides according to the left-right sequence, and load unloading is conducted for 2N times; according to the method, the load of the middle section of truss is unloaded