Abstract: A shaft sinking apparatus for sinking a concrete shaft in a pit includes at least one first steel beam disposed to span the concrete shaft, two second steel beams disposed on the first steel beam, at least two tightening units configured to force the second steel beams into abutment against the first steel beam, and at least two jack members provided among the first and second steel beams. When each of the jack members is actuated, the first steel beam is driven by the jack members to move downwardly away from the second steel beams to thereby force a lower surrounding edge of the concrete shaft to sink into a bottom surface of the pit.

Abstract: A sinking apparatus for sinking a concrete shaft includes a water tank, a valve assembly, a communication pipe, and a pumping device. The water tank is disposed on an upper surrounding edge of the concrete shaft, and has a water outlet port. The valve assembly includes a valve gate which is operable to open and close the water outlet port. The pumping device is disposed to permit water inside a central hollow portion of the concrete shaft to be pumped into a water accommodation space of the water tank through the communication pipe.