A locked coil wire rope includes a circular steel wire inner layer, a central metal core, and a Z-shaped steel wire outer layer. The central metal core has a structure of 1x19W, 1x19S, 1x26WS, 1x31WS, 1x31SW, 1x49SWS or 1x55SWS. The circular steel inner layer includes at least two circular steel wire layers, and a number of steel wires of circular steel wire layer is no less than 18. The Z-shaped steel wire outer layer includes at least one Z-shaped steel wire layer, and a number of steel wires of the Z-shaped steel wire layer is no less than 51. A capacity expansion framework is further disclosed.