JPS6262077A - Backfilling method - 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 application in the nitrogen industry] The present invention provides a method for forming a slab by forming a cement mortar on the surface of an iron plate having an uneven surface. This invention relates to a method for backfilling the gap between a through-hole and a T-piping inserted into the hole.

[Conventional technology]

When installing piping inside a building, a through hole is provided in a slab or the like, and the piping is routed through this through hole.Usually, a ring-shaped spacer between the direct through hole and the piping is filled with backfilling material to prevent fires. This prevents fire or smoke from spreading to adjacent rooms.

Generally, the slab of a building is formed by arranging reinforcement, building a formwork using plywood, etc., and pouring cement mortar, so in order to provide through holes for piping, as shown in Fig. When the paper void pipe 2 is attached and cement mortar 8 is cast, and after solidifying, the form l and the void pipe 2 are removed, a slab 8 having through holes 4 is formed as shown in FIG.
a is formed.

When backfilling is performed through the pipe 5 through the through hole 4, a hole 6a matching the outer shape of the distribution f5 is provided in the center, as shown in the vertical cross-sectional view and plan view in FIG. 7(a)fb). The board 6 made of plywood or the like is divided into two in the diameter direction of the hole 6a, fixed with nails or the like with the pipe 5 in between, the lower opening of the gap 7 is closed, and cement mortar is poured from the upper opening. Inject and solidify. Alternatively, instead of the plate 6, the plate shown in FIG.
As shown in a), a hole 8a corresponding to the outer shape of the pipe 5 is provided in the center of the dome, and a cut portion 8 is formed between the hole 8a and the outer edge.
b is provided, a somewhat flexible plate 8 which can be attached and detached in the shape of a brim is attached to the pipe 5, and this plate 8 has a hole 9a and a cut portion 9b as shown in Fig. 3 (b3). , a flexible ring 9 that can be attached to and removed from the pipe 5 is attached to the pipe W5, fastened to the pipe by the tightening band 10, and pushed upward as shown in FIG. The lower opening was closed and backfilled in the same way.

However, recently, the 10th method has been developed for slab formation because it does not require frame support and has many advantages in terms of workability, strength, and aesthetics.
As shown in the figure, a slab 12 made by pouring cement mortar 8 onto an uneven iron plate 11 is used to create through holes for pipes to pass through the slab 12, which is often used in the construction of buildings and condominiums. Conventionally, as shown in Fig. 1, a hole IB is bored in an uneven iron plate 11 by gas cutting or the like, and a void pipe 2 is inserted into this hole IB.
is attached, cement mortar 8 is placed, and after this solidifies, the void pipe 2 is removed to form the through hole 14.

Next, as shown in FIG. 12, the pipe 5 is passed through the through hole 14 and the gap 15 between the through hole 14 and the pipe 5 is backfilled with cement mortar, but at this time, the lower opening of the gap 15 is closed. , Inject cement mortar from the upper opening. However, if the surface to be closed is flat, it is easy to close it, but when using the iron plate 11 with unevenness, if it is closed with a conventional closing material used for a flat surface, such as the plate 6, the lower part Even if it comes into contact with the convex part toward , the concave part t
There is a large distance between ib and plate 6, and sealing cannot be achieved. The space formed by the iron plate 11 and the plate body 6 that accommodates the rounding and unevenness is filled with another cooling material L6 and sealed, and after cement mortar is poured and solidified, the plate body 6 and the sealing material 16 are removed and filled. The backfilling work has been completed, but it is an extremely difficult task.

[Problem that the invention seeks to solve]

In view of the above circumstances, the present invention has been developed by attaching a cylindrical body to a hole drilled in an uneven iron plate, pouring cement mortar to form a through hole, and forming a paving hole made of this cylindrical body, L-Hashiwaku 1. .4&
An object of the present invention is to provide a backfilling method that can backfill by closing the lower entrance area of ``qg, L'' with a container.

[Means for solving problems]

The present invention was made to achieve the above objects,
The gist is that when forming a slab by pouring cement mortar on the surface of an iron plate with an uneven surface, a through hole is provided in the slab, and the outer circumferential surface of the pipe that is inserted through the through hole and the inner surface of the through hole are A method of backfilling the gap between the surrounding surface and the
A hole corresponding to the outer shape of the through-hole forming cylinder is bored in the iron plate, the inner peripheral surface of the hole and the outer peripheral surface of the cylinder are in contact with the hole, and the upper end is not lower than the upper surface of the cement mortar to be cast. The cylindrical body whose lower end is flush with the lowest surface of the iron plate is inserted so that its lower end and the lowermost surface of the iron plate are flush with each other, and cement mortar is poured into the remaining portion of the iron plate to form a through hole. After forming a slab and inserting a pipe into the through hole, a mounting hole having the same inner circumference as the outer circumference of the pipe is bored in the pipe,
Between this mounting hole and the outer peripheral edge, a removable and slightly flexible plate with a cut portion is fixed to the lowermost surface of the iron plate in the shape of a brim using magnetic force, and the cylindrical body is This backfilling method involves closing the lower opening of the gap between the piping and injecting backfilling material through the upper opening of the gap and solidifying it.

[Specific structure and operation of the invention]

The present invention will be explained below with reference to the drawings.

1 to 3 show an embodiment of the backfilling method according to the present invention, and FIG. 1 shows an example of the backfilling method according to the present invention.
FIG.

To form the above-mentioned electrical connection hole 21, first, a hole 2z having a circular planar shape with an inner diameter matching the outer diameter of the cylindrical body 24 in which the through hole 21 is to be formed is bored in the iron plate ti. In this hole, the length is the lowest surface 11a of the iron plate ti, and the cement mortar 2 to be cast.
After inserting the cylindrical body 24 made of a non-combustible material and having a distance not smaller than the distance from the upper surface 28a of the iron plate 24 to the upper surface 28a of the iron plate, and positioning it so that the lowermost surface 11a of the iron plate and the lower edge 24a of the cylindrical body are on the same plane, Place cement mortar 28,
A slab 12 having through holes 21 is formed.

To insert the pipe 5 into the through hole 21 and backfill the space @825 between the inner peripheral surface of the through hole 21 and the outer peripheral surface of the pipe 5,
As shown in FIG. 2, a mounting hole 26a on the inner periphery corresponding to the outer periphery of the pipe 5 is bored in the center of the dowel, and a cutting part 26b is provided between the mounting hole 26a and the outer edge of the n1 pipe 5. A semi-flexible rubber plate 26 containing a magnet, which can be attached and detached in the shape of a brim,
As shown in FIG. 3, it is attached to the piping 5 and fixed to the lowermost surface 11a of the iron plate by its magnetic force. In this case, since the lower end edge 24a of the cylindrical body 24 forming the through hole 21t is in the same plane as the lowermost surface 11a of the iron plate 11, the lower opening of the gap @25 is located on the magnet-containing rubber plate 26. This can be easily backfilled by injecting a backfilling material such as cement mortar 27 from the upper opening.

FIG. 9 shows another embodiment of the present invention, in which the magnet-containing rubber plate 26 is replaced by a slightly flexible hard rubber or plastic plate having the same shape but without a magnet. This is made by using a plate z8 such as the above, and attaching it to the arrangement 'ffi, and sandwiching it between it and the lowermost surface 11a of the iron plate using a separate magnet 29. The same parts as in Fig. 3 are designated by the same reference numerals. The explanation will be omitted.

In the above description, the attraction force of the magnet causes the rubber plate 26 containing a magnet or the normal plate 28 to
Although fixed with the magnet 29, the iron plate and the plate body may be fixed using, for example, double-sided tape or the like. In addition, the cement mortar 28,
Alternatively, the engagement between the backfilling material 27 and the cylindrical body 24 may be strengthened. In addition, if the cement mortar for backfilling leaks due to poor contact between the inner circumferential surface of the hole 2z and the outer circumferential surface of the cylindrical body z4, the leakage can be prevented by blocking it with clay or other material in advance. .

〔Effect of the invention〕

As described above, the backfilling method of the present invention is as follows.

Since it is attached to the lowermost surface of a relatively wide iron plate using a rubber magnet plate or the magnetic force of a magnet, its fixing force is extremely easy and strong, and at the same time, the lower opening can be easily closed. It is possible to backfill the gap between the piping and the through hole in the slab using an uneven iron plate that is difficult to backfill with an extremely simple operation, and the jig used can be used repeatedly semi-permanently. This method has the following advantages.

[Brief explanation of drawings]

1 to 3 show an embodiment of the backfilling method according to the present invention.
FIG. 2 is a vertical cross-sectional view of a slab hollowed out by an iron plate having unevenness, and FIG. 3 is a perspective view of a plate that closes the gap.
FIG. 9 is a longitudinal cross-sectional view showing a state in which the gap is closed with a rubber plate containing a magnet, FIG. 9 is a view equivalent to FIG. 3 showing another backfilling method, and FIGS. This is an explanatory diagram of the conventional method of backfilling a surface slab by passing pipes through it. Figure 1 is a diagram showing an example of the slab forming method, Figure 6 is a vertical cross-sectional view of the slab, and Figure 7 (a) is the backfilling method. A vertical cross-sectional view showing an example, FIG.
Fig. 1 (at (b) is a perspective view of the plate and ring used in the conventional method, and Fig. 9 is a longitudinal section showing the state in which the gap is closed using the plate and ring. Figure, @t
Figure Q is a perspective view of a moss slab using an iron plate with unevenness, and Figures 11 and t2 show the gap between the piping inserted into this slab and the through hole when a through hole is provided in the slab using an iron plate with unevenness. FIG. 1 is a longitudinal sectional view showing a method of forming a through hole, and FIG. 12 is a longitudinal sectional view showing a method of backfilling a gap between a through hole and a pipe. . 5...Piping, 6...Plate, 6a...
... hole, 7 ... gap, 8 ... flexible plate, 8a ... hole, 8b ... cut section,
9... Flexible ring, 9a... Hole, 9
b... Cutting part, IO... Tightening band,
LL...irregular iron plate (iron plate), lla...
...Bottom surface, llb...Concave part, lz...
...Slab, 14...Through hole, 15...
...Gap, 21...Through hole, 22...
・Circular hole, 28...Cement mortar, 28a
...Top surface, 24...Cylindrical body, 24a.
... lower edge, 25 ... gap, z6 ...
...Rubber board book with magnet, 27...Cement mortar for backfilling, 28...Normal board, 2
g...Magnet.

Claims (3)

[Claims] (1) When forming a slab by pouring cement mortar on the surface of an iron plate having an uneven surface, a through hole is provided in the slab, and the outer circumferential surface of the pipe that is inserted through the through hole and the inner circumference of the through hole are This is a method of backfilling the gap between the surface and the surface, in which a hole corresponding to the external shape of the through-hole forming cylinder is bored in the iron plate, and the inner circumferential surface of the hole and the outer circumferential surface of the cylinder are brought into contact with this hole. , insert the cylinder whose upper end is not lower than the upper surface of the cement mortar to be cast and whose lower end is flush with the lowest surface of the iron plate so that its lower end and the lowermost surface of the iron plate are flush with each other, and Cement mortar is cast on the remaining part to form a slab with through holes, and after inserting the pipe into the through hole, a mounting hole having the same inner circumference as the outer circumference of the pipe is bored, and this mounting hole and the outer A removable, slightly flexible plate with a cut section is fixed to the lowermost surface of the iron plate using magnetic force, and the gap between the cylinder and the piping is A backfilling method characterized by closing a lower opening and injecting backfilling material from an upper opening of the gap and solidifying it. (2) The backfilling method according to claim 1, in which a plate made of rubber containing a magnet is used and fixed by its magnetic force. (3) The backfilling method according to claim 1, wherein the plate is sandwiched between an iron plate and a magnet and held by the magnetic force of the magnet.