Compound vacuum tube well for reinforcing dredging soft soil

A compound vacuum tube well for reinforcing dredging soft soil comprises an inner tube, an outer tube and a filter membrane. The lower end of the outer tube is closed, the upper end of the outer tube is provided with a seal head, the inner tube penetrates through the seal head to extend into the bottom of an inner cavity of the outer tube and is connected with the seal head in a sealed mode and communicated with a vacuumizing water drain pipe, the filter membrane is sleeved on the outer wall of the lower middle of the outer tube, and the wall of the outer tube sleeved by the filter membrane is provided with a permeable hole. Negative pressure generated by a vacuum pump is directly exerted on a soil body needing reinforcement, so that reinforcing efficiency is improved, construction period is shortened and economic benefit is remarkable.