JPS6188086A - Grouting method of piping penetrating section - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for grouting a through-frame part of a thick wall, floor, etc. of electrical equipment piping in a nuclear reactor building, radiation control building, etc.

(Problems to be Solved by the Invention) Electrical and equipment piping is often installed through the frames of nuclear reactor buildings and radiation control buildings. By the way, these frames form a shielding structure, so in the case of walls, the cost is 1,500 to 2,000.
mm, and it is necessary to completely inject grout with heavy mortar etc. around the purchasing part of the piping so as not to impair the shielding function, and to securely fix the piping.

(Means for Solving the Problems) This invention was developed in order to address the above-mentioned needs, and it is possible to reliably perform grouting and positioning and fixing of piping, thereby improving work efficiency and reducing costs. The purpose of the present invention is to provide a grouting method for pipe penetrations that can achieve

Therefore, in the method of grouting a pipe penetration part according to the present invention, the pipe is installed in the through hole of the frame covered with a sleeve, a lath fixing plate is attached to a position near the opening on the sleeve side and the piping side, and the lath The above purpose is achieved by installing a wire lath between the fixing plates, applying mortar to the opening side of the through hole around the pipe that is partitioned by the lath, and then injecting grout into the hollow part covered by the lath. It is something to be achieved.

(Embodiment) Fig. 1 shows an embodiment of the present invention, and Fig. 2 c-
t is an enlarged sectional view of the main part thereof.

■ The sleeve 2 is attached to the concrete wall frame 1 in advance to form a through hole 3, the pipe 4 is installed in the center of the through hole 6, and the pipe 4 is installed near the openings of the sleeve 2 side end and the pipe 4 side end. Attach the lath fixing plate 5 to each position using adhesive. The adhesion area of the lath fixing plate 5 is determined by grout injection pressure and lateral pressure.

■ Once the adhesive surface has hardened, attach the wire lath 7 between the lath fixing plates 5 and 5, and fix by bending the claws 6.

(2) A grout injection pipe 8 is installed in the through hole 6 around the pipe 4 from the opening side, and is brought into contact with or penetrates the wire lath 7. At this time, set an air bleed pipe (not shown) on the opposite side.

■ Apply mortar 9 to the opening side separated by wire lath 7, and after hardening, apply grout 1 to the hollow part covered with wire lath 7.
Inject 0. Once the grout 10 has hardened, the grout injection pipe 8 and the air vent pipe are removed, and mortar 9 is applied to the gap to complete the construction.

FIG. 3 shows another embodiment, in which piping 4 is attached to a frame 1 made of a concrete floor.

In this embodiment, a cover plate 12 is provided with a hole 11 slightly larger than the outer diameter of the pipe 4 in the center, and a sleeve 2
It is fixed in advance by welding etc. to the lower surface side of the. Then, the wire lath 7, grout injection pipe 8, air bleed pipe, etc. are attached to the upper surface side in the same manner as in the previous embodiment, and construction is carried out according to the procedure described above.

In addition, in the example illustrated above, after cloud construction,
A heat insulating material 16 is wrapped around the pipe 4.

(Effects of the invention) ■ Since the piping inside the through hole is temporarily fixed with wire lath,
Positioning etc. can be performed easily and reliably, and there is no risk of piping moving during grout injection even though no formwork is used.

■ Since no formwork is used, work efficiency is greatly improved.
It is possible to shorten the construction period and reduce costs.

■ After temporarily fixing the pipes with wire laths, apply mortar to the opening side of the through-holes around the pipes, which are partitioned by the laths, and then inject grout into the hollow parts covered by the laths to secure the through-holes in the frame. Safe closure is achieved and the function as a shielding structure is not impaired.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part thereof, and FIG. 3 is a sectional view showing another embodiment. 1. Frame, 2. Sleeve, 6. Through hole, 4. Piping, 5. Lath fixing plate, 6. Nail, 7. Wire lath, 8. Grout injection pipe, 9. Mortar, 10... grout, 11... hole, 12... cover plate, 13... heat insulating material.

Claims (1)

[Claims] Install the piping in the through-hole of the frame covered with a sleeve, install a lath fixing plate near the opening on the sleeve side and the piping side, install a wire lath between the lath fixing plates, and secure the penetration around the piping. A method for grouting a pipe penetration part, characterized by applying mortar to the opening side of the hole partitioned by lath, and then injecting grout into the hollow part covered with lath.