Ultra-long raft foundation applied to gas-insulated metal-enclosed switchgear

The embodiment of the invention provides an ultra-long raft foundation applied to a gas insulated metal-enclosed switchgear, which comprises a first raft, a second raft and a dowel bar, the first raft and the second raft form a foundation plane for placing the gas insulated metal-enclosed switchgear, and the dowel bar is connected with the first raft and the second raft. A gap is formed between the first raft plate and the second raft plate and is used for preventing the first raft plate and the second raft plate from being extruded and deformed when volume expansion caused by large external environment temperature change or volume expansion caused by hydration heat during pouring of the first raft plate and the second raft plate; besides, the dowel bar is located in the gap, the two ends of the dowel bar are arranged in the first raft plate and the second raft plate respectively, and at least one end of the dowel bar is movably arranged, so that it is guaranteed that the first raft plate and the second raft