JPH0144952B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a method for grouting a penetration part of a building frame in a thick wall, floor, etc. of electrical and equipment piping in a nuclear reactor building, a radiation control building, etc., and an apparatus used in the grouting process. It is related to.

Problems to be Solved by the Invention Electricity and equipment piping are often installed through the frames of nuclear reactor buildings and radiation control buildings. By the way, these frameworks form a shielding structure, so in the case of walls,
The length ranges from 1,500 to 2,000 mm, and it is required to completely grout the area around the piping penetration with heavy mortar etc. so as not to impair the shielding function.

The present invention is a method and apparatus developed to address the aforementioned needs.

Structure of the Invention and Embodiments The gist of the invention is as described in the claims, and its main part is that a mesh pipe is arranged in a through hole, and a mesh pipe is arranged in a through hole, The primary grout is injected into the hole, air is removed from the mesh pipe, the injection status is confirmed, and then the secondary grout is injected into the mesh pipe.

The details will be explained below with reference to illustrated embodiments.

1 and 2 show an outline of the implementation state of the method of the present invention, in which a through hole 2 is formed in a frame 1 made of a concrete wall, etc., and a pipe A is installed in the center of this through hole 2. A grout injection pipe 3 is arranged on the lower surface, a mesh pipe 4 made of wire mesh is arranged along the upper wall of the through hole 2, and both ends of the through hole 2 are connected to the formwork 5, 5. occlusion.
Next, a primary grout 6 made of non-shrinkable gravimetric mortar is injected through the injection pipe 3. At this time, the mesh pipe 4 passes through the formworks 5 and opens to the outside, so air is removed from there, and the primary grout 6
When the mesh pipe 4 is filled, the primary grout material permeates into the mesh pipe 4, so that the state of the injection and the completion of the injection can be visually confirmed.

Next, hoppers 7, 7 are attached to both ends of the mesh pipe 4, and secondary grout made of the same material as the primary grout is injected into the mesh pipe 4 from one hopper 7 by the pouring method using its own weight, and then from the other hopper 7. The pouring work is completed by pouring from to overflow, and the hopper 7 is removed.

The equipment such as formwork for carrying out the above method is shown in Figure 3.
It is shown in FIG. And the formwork 5 is made of hard rubber 5
-1 and water-resistant veneer 5-2 are overlapped, and the pipe A, the injection pipe 3, and the mesh pipe 4 arranged in the frame through hole 2 penetrate the formwork 5. The rings 8 located on both outer sides of the through hole 2 are attached to the pipe A by jacks 9 that penetrate the rings 8 and are arranged radially.

Also, a jack 10 placed around this ring 8
The front end pressing plate 11 presses the formwork 5 to the surrounding frame 1 of the through hole 2. The hopper 7 is detachably attached to the mesh pipe 4, and is attached when the secondary grout is injected after the primary grout 6 is injected from the injection pipe 3.

Effects of the Invention This invention has the above-mentioned configuration, and although grout is injected into a through-hole of a building frame having a considerable thickness, by placing a mesh pipe in the through-hole, it is possible to inject grout even if both ends are closed with formwork. Air is removed through the mesh pipe, and the grout injection status can be checked as the grout material permeates into the mesh pipe. Finally, by injecting secondary grout into the mesh pipe, the through holes in the frame are completely closed, so that the function as a shielding structure is not impaired.

Furthermore, the formwork can be reliably crimped around the through hole by jacking around the ring attached to the pipe, making grout injection work easy and reliable.

[Brief explanation of drawings]

FIGS. 1 and 2 are sectional views showing an outline of an embodiment of the method of the present invention, and FIGS. 3 and 4 are sectional views and front views of an apparatus for carrying out the method. A...Piping, 1...Structure, 2...Through hole, 3...
...Injection pipe, 4...Mesh pipe, 5...Formwork, 6...
...Primary grout, 7... Hopper, 8... Ring, 9... Jacket, 10... Jacket, 11...
...Press plate.

Claims (1)

[Scope of Claims] 1 Piping is installed in the through-hole of the building frame, and an injection pipe and a mesh pipe are arranged, both ends of the through-hole are closed with formwork, and the injection pipe is inserted into the through-hole around the piping. A method for grouting a pipe penetration part, characterized by injecting primary grout into the mesh pipe, confirming completion of the injection of the primary grout through a mesh pipe, and then injecting secondary grout into the mesh pipe. 2. Install piping inside the building frame through-hole, arrange the injection pipe and mesh pipe, close both ends of the through-hole with formwork, and attach the ring outside the through-hole to the piping using jacks arranged radially. A grouting apparatus for a pipe penetrating part, characterized in that the ring is provided with a jack for pressing and fixing the formwork, and the mesh pipe is capable of connecting a hopper.