Construction structure for reserving bolt holes in formwork-free equipment foundation

The utility model relates to a construction structure for reserving bolt holes in a formwork-erecting-free equipment foundation, and relates to the technical field of building construction. The device comprises a steel tube bundle, an air bag and a fixing mechanism used for fixing the steel tube bundle. The steel tube bundle is arranged in a forming cavity of the equipment foundation mold; the air bag is arranged in the steel tube bundle and abuts against the inner wall of the steel tube bundle. The forming device has the effect of improving the forming quality of the reserved bolt hole. 本申请涉及一种免支模设备基础预留螺栓孔洞的施工结构，涉及建筑施工技术领域。其包括钢管束、气囊以及用于固定所述钢管束的固定机构；所述钢管束设置于设备基础模具的成型腔中；所述气囊设置于所述钢管束内部，且所述气囊与所述钢管束内壁抵接。本申请具有提高预留螺栓孔洞的成型质量的效果。