Composite columns core structure for tunnel lining

The utility model relates to an underground works technical field, concretely relates to composite columns core structure for tunnel lining. This composite columns core structure is the columnar structure, and both ends are the link respectively, and length is 2-5 rice, and the post directly is the 10-80 millimeter, the link of composite columns core structure sets up the step that contracts in inside, supplies the steel pipe sleeve to cup joint. Composite columns core structure concatenates the formation inner prop. A plurality of inner prop matrix arrangements form the inner prop structure. Concreting around the inner prop of inner prop structure wholly forms tunnel lining. Obtain composite columns core structure through the mould vibration shaping of preparing burden, blend, go into, first foster, whole supporting. Prepare composite columns core structure outside the hole in advance, composite columns core structure adopts active powder concrete structure, and matter is light, and intensity is big, and good installation, and active powder concrete forms composite construction with the concrete of cast in situs, can undertake the load of country rock load and structure self.