Pipeline reserved hole plugging mold and construction method

Abstract

The invention discloses a pipeline reserved hole plugging mold and a construction method. The mold comprises two semicircular bottom molds which are oppositely arranged; a first lap joint part is fixedly arranged at the end, in the circumferential direction, of each bottom mold, the top of the first lap joint part is flush with the top of the bottom mold, a second lap joint part is fixedly arranged at the end, in the circumferential direction, of the bottom mold, and the second lap joint part is located below the first lap joint part and matched with the first lap joint part in a lap joint mode; and semi-cylindrical hoops are fixedly connected to the bottoms of the bottom molds, and the two hoops are oppositely arranged and detachably connected together. The mold and method have the beneficial effects that the defects that hole sealing gaps are not tight, a hoop displaces and slips off, the bottom molds are deformed and staggered, and slurry leaks from a plugging part are overcome, the hidden danger of leakage from a contact surface can be effectively prevented, and mold hoisting plugging of a pipeline reserved hole and quality improvement of a building installation project are achieved.

Description

technical field [0001] The invention relates to the technical field of plugging molds, in particular to a plugging mold for reserved holes in pipelines and a construction method. Background technique [0002] During the construction of the cast-in-place structure of the building, in order to meet the installation of indoor water supply and drainage pipes, it is generally adopted to reserve pipe holes or pre-buried casings on the cast-in-place floor. After the pipe installation is completed, the reserved holes need to be sealed. In the prior art, the common construction methods for sealing pipe holes are as follows: [0003] 1. Use wood plywood as the plugging base film for the reserved hole. First, open a hole on the bottom mold according to the outer diameter of the pipe, then cut the template into two halves through the center of the hole, put the butt ring around the pipe, and use short steel bars as the bottom The keel of the mold is fixed by hanging the bottom mold wit...

AI Technical Summary

Problems solved by technology

[0008] 1. The annular plate that comes with the mold is used as the bottom mold to block the reserved hole. After installation, it is difficult to completely adhere to the bottom surface of the floor. On the one hand, the flatness of the bottom of the slab is difficult to achieve absolute flatness, and there are natural gaps between the bottom mold and the bottom of the slab ; On the other hand, the mold itself lacks measures to make it reliably bear the force and stick to the bottom of the plate, and cannot effectively apply pressure to the bottom mold in advance. Therefore, only the fixed hoop can play a role when the bottom mold sinks, commonly known as " "Wait for strength", the annular slab is inelastically deformed under the action of concrete pouring load, which may easily lead to insufficient reinforcement, resulting in grout leakage or even mold expansion

[0009] 2. The contact surface between the hoop and the pipe is relatively smooth. Although the bolts are used for fastening, the hoop is prone to move or slip during the concrete vibration process because the fastening force cannot be transmitted evenly.

[0010] 3. The bottom mold of the ring plate is easy to deform after repeated use, especially at the joint of the two bottom molds. After the bottom mold is installed, there is a large gap between the bottom mold and the bottom of the plate, or there is a misalignment between the two bottom molds, resulting in blockage Leakage of grout and poor flatness of the construction surface

[0011] 4. Most of the drainage pipes are made of PVC material with a smooth surface. When the hole is blocked later, the concrete poured twice will shrink and deform. The adhesion between the PVC pipe and the concrete is poor, and the contact surface is prone to leakage

Images