Construction method of reserved hole in cast-in-place floor plate

• Main Authors: WANG LINWEI, ZHENG LULU, XIANG JIANG, MA QING, HE YUDONG, WANG JINGJING, ZHAO JINXIANG, ZHANG JINGJING, REN ZHITONG
• Format: Patent
• Language: Chinese; English
• Published: 18.07.2023
• Subjects: BUILDING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE; FIXED CONSTRUCTIONS; FORMS; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS; SCAFFOLDING; SHUTTERING

The invention discloses a construction method of a reserved hole in a cast-in-place floor plate. The problems that a mold of an existing reserved hole cannot be repeatedly used, and the construction cost is high are solved. A stand column (1) is vertically arranged at the center of a reserved hole (22) in a floor plate pouring bottom formwork (23), a lower limiting pin hole (4) is formed in the lower portion of the stand column (1), the stand column above a cylindrical lower limiting step (2) is movably sleeved with a fourth lantern ring (11), the stand column above the fourth lantern ring (11) is movably sleeved with a lower compression spring (7), and the lower compression spring (7) is sleeved with a lower limiting pin hole (8). A third lantern ring (10) is movably sleeved on the upright post above the lower pressure spring; cantilever rods are radially arranged on the two lantern rings, lower arc-shaped vertical plates are hinged to the outer ends of the corresponding upper and lower cantilever rods, the