Releasing device for bottomless dual-wall steel boxed cofferdam

The utility model discloses a releasing device for a bottomless dual-wall steel boxed cofferdam. The releasing device comprises a support platform, wherein the support platform is formed by horizontally connecting a plurality of support pile casings with steel tubes; an assembling platform is arranged on the outer sides of the support pile casings on the periphery of the support platform; a releasing bracket is arranged at the top of the support pile casings on the periphery of the support platform; and a continuous jack is arranged on the releasing bracket. According to the releasing device disclosed by the utility model, the large-sized steel boxed cofferdam under the conditions of deep water and complex hydrological, geological and meteorological conditions can be accurately positioned and construction procedures can be reduced; in addition, the interference on a navigation channel is less; the construction period is shortened, construction expenses are reduced and the positioning accuracy of the cofferdam