JPH028462A - Method for repairing building's external wall and anchor pin therefor - Google Patents

Abstract

PURPOSE:To permanently prevent falling off or the like of mortar by undetachably driving in a hollow anchor pin to a hole for inserting of the anchor pin bored so deep that it reaches a concrete body, and by filling a loose part with adhesive injected through an adhesive injecting nozzle. CONSTITUTION:The pin P as described in the title consists of an anchor body 11, made from metallic tube, and a plug 12 that is inserted into the inside center. At the bottom end of the body 11, an outwardly expanded nozzle connecting drum 13 is provided, and a split 17 is provided extending all over the whole length of the base drum face, and a claw ring 18 is provided at the tip of the body. At each loose part of an external mortar wall M, a hole to which the anchor pin is inserted is bored so deep that is reaches a concrete body C. Then, the body 11 is driven in and, at the same time, the head of the pin P is deformed and expanded to open with the plug 12 being tapped at its tail end. After that, an adhesive injecting nozzle is connected to the drum 13 and the adhesion is injected to fill the loose part. Thereby, falling off of the mortar or the like can surely be prevented.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for repairing the outer wall of a building, particularly a repair method for durablely preventing lifting or peeling of the mortar outer wall against the concrete body of the building, and a method for use therein. This invention relates to an anchor pin for guiding adhesive injection.

<Prior art> Adhesive (B) is injected into the parts of the wet mortar exterior walls, such as tiles or bricks, that correspond to the concrete of the building. It is called the anchor pinning method because it does not involve filling.

Note that the symbol (S) in the figure indicates an adhesive area that spreads out in a circular shape from the portion fixed by the anchor pin (10), and the symbol (T) indicates a tile or brick.

<Problem to be solved by the invention> However, the former combination method can be applied to ensure the long-term durability of the mortar outer wall (M) and when the floating area per location is relatively large, and its effectiveness can be improved. However, in order to achieve this, as is clear from FIG. This requires drilling, which is extremely complicated and labor-intensive on-site.

In addition, anchor pinning injection has traditionally been used as an exterior wall repair method to prevent the adhesive (B) from lifting or peeling off at a location separate from the part fixed by the anchor pin (10). Two types of methods are known: a combination method and an anchor pinning method alone.

As shown in Figure 22.23 of the former (jf construction method), the pre-marked degree grits 1 float RIE (
a) by driving the anchor pin (10) into the concrete I, main body (C), fixed J-ro, and the pin (
10) The floating margin (b) remaining at the intermediate position between adjacent fixing parts is injected and filled with adhesive (I3) such as epoxy resin or polymer cement 1 slurry, and the mortar outer wall (M) and its It is integrated with the main body (C) without any gaps.

In addition, in the latter single work d: as shown in Figure 24.25, the floating part of the two-person grid is also marked.
)-\、Sakizu-'' Inject and fill the adhesive (B) with the same adhesive as Yuki, then overlap the floating part (a) and attach the anchor pin (1).
0), the mortar outer wall (M) and the mortar N body (C) are fixed and integrated. The amount of deflection of the mortar outer wall (M) becomes excessive <,L
1) Unless the injection pressure is managed stably, there is a risk that the mortar outer wall (M) will become wavy or peel off due to the injection pressure. In other words,
If the injection pressure is too high, it will bend in a floating shape, and on the other hand, if it is too low, it will not be able to inject a sufficient amount, causing it to flake off, making it difficult to maintain the injection pressure. It is.

In this regard, according to the latter single method, the driving hole for the anchor bottle (10) and the injection hole for the contact agent (B) are used together, so the advantage is that the two types of drilling work are not required. On the other hand, since the anchor pin (10) used in this is a commonly known product, if the injection nozzle (N) is completely removed after injection of the contact agent (B), the jfi Therefore, it is impossible to drive the anchor pin (10) into the anchor pin (10), and from this point of view, the workability on site is still inferior.

Moreover, unlike the above-mentioned combination method, the amount of deflection around the anchor pin (10) floor 7 hole becomes excessive at the intermediate position between adjacent adhesive injection points. Anchor pin (10
Since the adhesive (B) is injected prior to the implantation of the adhesive (B), it is still extremely difficult to maintain and manage the injection pressure. In any case, this independent construction method should only be applied if the mortar outer wall (M) is only required to ensure temporary durability, or if the floating area of one spot is relatively small. I can't.

Means for Solving the Problems> The present invention aims to fundamentally solve the above problems by providing the anchor pin itself with an adhesive injection guide function. First, drill an anchor pin driving hole deep enough to reach the concrete body from the mortar outer wall in the floating part of the unit grid marked on the mortar outer wall, and then drill a part of the opening of the tip expansion groove. A hollow anchor pin is irremovably driven into the above-mentioned driving hole so as to face a portion of the required thickness in the outer wall of the mortar, and the pawl ring and the tapered sloped step surface for receiving the plug are plastically worked. A split groove of a certain length is formed on the trunk surface of the anchor body so that when it is driven and fixed to the concrete cap body, a part of the opening will be exposed toward the required thickness of the mortar outer wall. It is characterized by what it did.

Furthermore, in order to effectively prevent backflow during adhesive injection and deflection of the outer wall of the mortar, a more preferable configuration for the anchor pin is to make the nozzle connection tube of the anchor body have a diameter smaller than that of the reference body surface of the anchor body. It is characterized in that it is formed to protrude greatly and that the grooves are arranged in an open manner over almost the entire length of the reference body surface excluding the large-diameter nozzle connection port tube.

<Example> Hereinafter, the details of the present invention will be specifically explained based on the drawings. Figures 1 to 7 show the anchor pin (P
), which is made of stainless steel.The tip is attached to the base end of the fixed anchor pin, and then the adhesive injection nozzle is removably connected, and the epoxy resin is injected from the nozzle into the anchor pin. By injecting and filling adhesive such as polymer cement slurry, the adhesive leaks out from the groove and spreads around the anchor pin and between the mortar outer wall and the concrete 1-11H body. In addition, in order to inject and guide the adhesive into the floating parts of the unit grids marked on the mortar outer wall in advance, the above method can be implemented by driving the adhesive into the concrete body from the mortar outer wall and fixing it. The hollow anchor pin provided consists of an anchor body made of stainless steel pipe or other rust-free metal pipe, and a steel ingot plug that is inserted and set inside the anchor body. While a nozzle connection tube is provided that is removably connected to the nozzle for injecting the agent, the tip also has a floor 101) for biting into the concrete IW body, and a special steel ingot that is inserted and set into the hollow interior. Plug (12) Consists of the desired thickness (as described later).
It will be used by pouring it into the concrete cap (C) of the building through the mortar outer wall (M) of W).

The anchor body (11) is made to have a constant length (Ll) of, for example, about 57 mm, which is sufficient to penetrate the mortar outer wall (M), and is made by plastic working of a metal tube with a uniform wall thickness of about 0.75 mm. A nozzle connection 11 tube (13) is provided at its base end without protruding outward.

(14) is a screw carved on the inner circumferential surface of the nozzle connection port tube (13), and is used as an adhesive injection nozzle (15) to be described later.
It will be removably connected. (16) is a stopper step surface generated at the boundary position with the reference body surface of the anchor body (11), facing the protrusion of the nozzle connection port tube (13), and preferably has an inclination slope of about 45 degrees. It's a face.

(17) extends over almost the entire length of the reference body surface excluding the nozzle connection pipe (13), facing each other as a pair with an opening extension distance of 1
1 function and the distribution function of adhesive (B) described later. In other words, when the anchor body (11) is driven into the concrete frame (C) through the mortar outer wall (M), even if the required thickness (W) of the mortar outer wall (M) changes in thickness, the Adjust the opening length (L) of the split groove (17) so that part of the opening of the split groove (17) faces the part (W).
2) is made as long as possible.

Further, (18) is a pawl ring (18) which protrudes outward from the vicinity of the tip of the anchor body (II) in a convexly curved shape, and has a biting effect on the concrete (11) body (C) when used for driving. do. (19) is a tapered sloping stepped surface which is continuously bent in a reverse inwardly projecting position immediately after the claw ring (18), and is formed by a pair of opposing sides.
It forms a slope surface with a degree of inclination.

When the plug (12) inserted into the anchor body (11) is struck, the tip of the anchor body (11) is smoothly expanded and deformed as it is received by this tapered inclined stepped surface (19). This is how it is supposed to be done. In addition, the plug (12) has a wedge action on its deformation of No. 1.
3.

Moreover, as illustrated in conjunction with the first modification, the above-mentioned groove (
17) are arranged in a cross-shaped row with many openings, and a tapered sloped step surface (19) is provided to receive the plug (12).
) can also be deformed into a tapered conical shape over the entire circumferential surface by drawing instead of punching the metal tube.

Furthermore, as shown in the second modification shown in FIGS. 11 to 14, as long as the connection tube (13) with the nozzle (15) is provided,
An anchor body (11) made into a hollow cylindrical shape with non-uniform wall thickness by forging a special steel bar is also suitable for use in the present invention. The screw (14) provided on the nozzle connection tube (13) may be removably connected to the nozzle (15) by alternatively using unevenness or other processed shapes.

In this regard, in the third modification shown in Figures 15 and 16, keyhole-shaped notches are formed in the nozzle connection tube (13) in place of the screws (14) in Figures 1 to 7. Ba nozzle (15
), which can be attached and detached in a so-called one-touch manner, is made in the shape of a round peg or bullet.

- As shown in Figures 1 to 7, 11 nozzle tubes (13) are connected to the proximal end of the anchor body (11) through the stopper step surface (16) from its reference body surface so that the nozzle does not protrude into the i pup. If a screw (14) is carved into the nozzle contact b°L [1 cylinder (13), the nozzle (15) for injecting the contact agent can be stably received there. Then, as it is: E can be directly screwed and tightened, and when the adhesive (I3) is applied by the nostle (15), the adhesive (LJ) receives the pressure of the adhesive (I3).
In order to prevent the old water from flowing backwards from the anchor body (11), -1-Kidai I/Bang-step face (1G) + U (+
'-In the sense that it can be blocked, it can be considered to be a significant benefit.

However, as shown in the first modification shown in FIGS. 8 to 10, the nozzle connection 1. ]f15(13) is the base ll! +, So-called through-1 type anchor body (11) with the same diameter size as the trunk surface (11)
In addition to adopting the above, it is also possible to carve an indentation (+71>) on the outer circumferential surface of the nozzle connection 11 cylinder (13). In that case, the adhesive 3'f11? i. Slip Okawa nozzle (15) 1
No. 14.The remaining configurations in the first to third variations are as follows:
Since it is substantially the same as the above basic example in the figure, the child's 8th to
In Fig. 16, the correspondence with Figs. 1 to 7 is limited to 3°C, and the explanation of the q&01 is omitted, but in any case, the anchor pin (P) of the present invention is
11), the above constant opening [1 length (l, 2) difference (17
), this becomes concrete-1-solid (C
)・＼Although it is driven and fixed, it receives and guides the adhesive (I3) that will be injected afterwards, and also around the anchor pin (P) and the outer wall (M) of the second roof and its concrete 1!1li
The adhesive injection nozzle (13) is provided at the base end of the anchor body (11) so that the adhesive can flow smoothly between the adhesive injection nozzle (C) and the adhesive (C). 15) can also be stably connected to Tsuji iJI.

<Operation> In the case of the present invention, the repair work of the mortar outer wall (M) is carried out according to the following process sequence while using the anchor pin (P) as described above.

No. 15 A standard unit grid with markings is shown. First, for each floating part (a), use a drilling tool (21) such as a drill as shown in Fig. 18 to drill the mortar outer wall ( An anchor pin driving hole (22) with a depth reaching the concrete frame (C) from M) is opened. and,
Insert the anchor pin (P) into the driving hole (22).
At the same time as driving the anchor body (11) of the anchor body (11), the plug (12) inserted and set into the anchor body (11) is struck with a hammer or the like]-υ.

(23) as shown in Fig. 19.

Then the anchor pin (P) will be attached to its anchor body (
11) expands and deforms from the tip of the concrete body (C
), while the nozzle connection tube (13) at the base end is exposed through the mortar outer wall (M), and the required thickness of the mortar outer wall (M) is fixed. The groove (17) of the anchor body (11) is also in an open position so as to face the part (W).

Therefore, as is clear from Fig. 20, when the adhesive (B) is injected into the nozzle connection tube (13) of the anchor bottle (P) in item 1, the adhesive (B) is As shown in Figure 20.21, the mortar flows out from the groove (17) opening in the anchor body (11) to the surrounding area, and also between the mortar outer wall (M) and its concrete frame (C). Therefore, they are bonded and integrated through the adhesive (B) without any gaps between them.

In addition, the anchor pin (P) that is fixed to the concrete frame (C) will also be fixed even more strongly by the adhesive (B). From this point of view, the above basic example and Even if the anchor body (11) is made of a thin-walled stainless steel pipe as in Modification 1.3, it can be used without any problem of cutting, and rusting etc. can be effectively prevented. Adhesive (
The injection operation B) is performed by attaching and detaching the nozzle (15) to the anchor pin (P) which is fixed at the beginning, and by using a single pump (24) common to the many nozzles (15). , - By distributing and injecting the adhesive (B) such as wet curing type epoxy resin or polymer cement slurry, the adhesive (B) such as wet curing type epoxy resin or polymer cement slurry is applied to the anchor pin by connecting the nozzle (15) for refill injection in a detachable manner. It is injected and filled into the hollow interior of (P).

In that case, in the anchor pin (P) of the basic example or the 2.3rd modification, the nozzle (15) is directly screwed and fastened to the nozzle connection pipe (13), and the anchor pin (P) of the 1st modification is At the anchor pin (■)), attach the nozzle connection tube (13).
-'- Separate joint pipes (20) are screwed together (first
(See Figure 0), and the nozzle (15) 4 is screwed into the joint pipe (20) to maintain a stable mutual communication connection and prevent backflow of the adhesive (B). be.

Further, the nozzle (15) may be connected in communication with an integrated or separate pump (24) as shown in FIG. 20, and the adhesive (B) can be forcibly injected by the hydraulic pressure or air pressure. preferable. Close the lid and keep the constant injection pressure i'
This is because maintenance control can be easily performed.

As mentioned above, continue to insert the No.
, 18 Note that the symbol (S) in FIG. 17 and FIGS. 20 and 21 indicates the area in which the adhesive (B) shown in - indicates the influence area.

Although the tiles or bricks attached to the surface of the mortar outer wall (M) are not shown, it goes without saying that the present invention can be applied as is as a repair method for the mortar outer wall (M) that has been stretched.

<Effects of the Invention> In short, in the present invention, as an exterior wall repair method, concrete is first applied to the floating part (a) of the unit grid marked outside the mortar q (M) from the mortar exterior wall (M). Drill an anchor pin driving hole (22) deep enough to reach the main body (C), and then drill the tip expansion groove (+7
) A hollow anchor pin (P) is irremovably driven into the above-mentioned filling hole (22) so that a part of the opening [1] faces the required thickness (W) of the mortar outer wall (M), and this After that, a nozzle (15) for adhesive injection is removably connected to the base 6111 of the anchor pin (P) which was first fixed by
, 19 By injecting and filling adhesive (B) such as mercement slurry, the adhesive (B) is passed through the groove (17) into the anchor bin (
Since the leakage is caused to spread around the mortar wall (M) and its concrete frame (C), it has the effect of completely solving the problems of the prior art mentioned at the beginning.

That is, the pre-marked floating part of the unit grid (
In a), the anchor pin (P) is first driven and fixed into the concrete 1/frame (C), and then the anchor pin (P) is driven into the concrete body (C) using the nozzle (15) connected in communication with the anchor pin (P).
Since the method involves injecting and filling adhesive (B) into P),
Compared to the conventional anchor pin injection combination method, there is no need to drill two types of holes, the anchor pin driving hole and the adhesive injection hole, and when compared with the conventional anchor pinning alone method, The anchor pin (P) can be driven and fixed without having to take out the nozzle (15), and the work at the finishing site can be carried out extremely simply and efficiently.

The anchor body (11) consists of a hollow anchor body (11) made of stainless steel pipe or other rust-free metal pipe, and a steel ingot plug (12) inserted and set inside the anchor body (11). A nozzle connection pipe (13) is provided at the base end of the nozzle (13) which is removably connected to the adhesive injection nozzle (15), while a claw ring (13) for biting into the concrete frame (C) is provided at the tip end of the nozzle (13). 18) and the plug (12
) is plastically worked on the tapered sloped step surface (19) which serves as a receiving part for the anchor body (11), and the above-mentioned concrete is also applied to the body surface of the anchor body (11).
) A split groove (17) with a constant length L2) whose opening part is exposed toward the required thickness (W) in the mortar outer wall (M) when it is driven and fixed into the 11fi body (C). ), the nozzle connection tube (13) allows the nozzle (15) for inserting adhesive to be easily attached and detached, which has the effect of improving work efficiency on site.

In addition, the anchor body (11) can completely ensure the long-term durability of the mortar outer wall (M), even though the anchor body (11) is superior to the mortar outer wall (M) and its work 4 (1). This is a construction method in which the pin (P) is first driven and fixed, and then the adhesive (B) is injected and filled from the nozzle (15) under the adhesive receiving and guiding action of the anchor pin (P). Therefore, even if the injection pressure of the sheet metal adhesive (B) is too high, there is no fear that the mortar outside q (M) will rise up in a wavy shape from the concrete NW body (C) due to this, and the mortar Outer wall (M
) The injection pressure can be increased without worrying about the amount of deflection of the J1 part, and the maintenance of the carpenter is extremely easy. B) can be injected without shortage 1. 'Reliably prevents AIl from falling off.
5 things will happen.

As for the anchor pin (P) itself used in carrying out the above 1-method, adhesive (B) is applied to the floating part (a) of the unit grid that has been marked on the mortar outer wall (M) in advance due to its structure.
Without guiding the injection, from the outer wall of the mortar (M), pour the Ninon Cree 1-a [f1 body (C)-1 o22 Part: Non Cree 1 'It! When used by driving into the mortar body (C), a constant length (L2) of 1iS5 (+7) is formed every time it opens toward the required thickness (W) that falls on the mortar outer wall (M). Since the adhesive (B) is applied to the anchor body (11) through the opening groove (17),
), and between the mortar outer wall (M) and its concrete frame (C), the leakage spreads to the outflow.

In that case, as is especially clear from the basic examples in Figures 1-7,
If the nozzle contact Mi ID cylinder (13) is to be formed with a large diameter overhang from the base b::5 part of the anchor body (11) via the stopper step surface (16), it will be attached to the concrete frame (C). When the adhesive (B) is injected and filled from the nozzle (15) in the fixed state, the nozzle contact 1'/
l: The stopper step surface (16) of i (+3) with l-1 acts as a stopper to block the backflow of the adhesive (B) (ej
As a result, the spread area (S) of adhesive 1) can be expanded as much as possible, and the stopper step surface (1G
) resists the bending deformation of the mortar outer wall (M), and further improves the durability and strength of the mortar outer wall (M).

The main function of the anchor pin (P) is to guide the injection of adhesive (B), and it can be used to attach concrete 1, the main body (C), and various other equipment after installation, just like conventionally known products. Moreover, the adhesive (B) received in the anchor body (11) also acts on the concrete frame (C), and is fixed in a superimposed manner with the adhesive force. As a result, even when plastic working is performed from thin metal pipes such as stainless steel pipes, there is no deterioration in the strength of fixing them to concrete 1/framework (C).
On the contrary, we are hoping to maximize the mass production effect, and as a repair part for the mortar outer wall (M), which is used in large quantities,
It can be said that it is extremely profitable.

[Brief explanation of the drawing]

1 to 7 show a basic example of the anchor pin according to the present invention, FIG. 1.2 is a plan view and a side view thereof, FIG. 3.4 is an enlarged front view and an enlarged back view, and FIG. 5. Figure 6 is 5- in Figure 1.
5-line sectional view and No. 25 along line 6-6 (B) (C) (M) (P) (S) (a) (b) Anchor body plug nozzle connection 11 cylinders Adhesive injection nozzle stopper stepped surface Split groove adhesive concrete 1-1m body Mortar outer wall Anchor pin Adhesive spread area Floating section Floating section KFC Nippon Telegraph and Telephone Co., Ltd. Richtsuk Yoshikazu Engineering Co., Ltd. Enlarged cross-sectional view, Fig. 7 is a side sectional view showing how the anchor pin is used, FIGS. 8 to 10 similarly show a first modified example of the anchor pin, FIG. 8 is a side sectional view thereof, and FIG. 10 is a side sectional view of the anchor pin in use, FIGS. 11 to 14 further show a second modified example of the anchor pin, FIG. 11 is a side view thereof, and FIG.
．． 13 is a sectional view taken along lines 12-12 and 1313 in FIG. 11, FIG. 14 is a side sectional view of the anchor pin in use, FIG. 15 is a side view showing a third modified example of the anchor pin, and FIG.
The figure is an enlarged sectional view taken along line 16-16 in Figure 15.
Fig. 7 is a unit glyph 1 schematically showing the arrangement state of the anchor pin, Figs. 18 to 20 are side sectional views of each side without showing the order of the action of the present invention, and Fig. 21 is a unit glyph 1ill in the state where the action is completed.
I sectional view, No. 22 1 shows the arrangement of anchor pins according to the conventional method -1, 1ilc Grits 1, Fig. 23 is an enlarged sectional view taken along line 23-23 in Fig. 22, and Fig. 24 is a separate Jusong 2 "Law unit glyph 1, Figure 25 is 2 in Figure 24.
FIG. 5 is an enlarged sectional view taken along line 5-25. -Dimension μ) Fig. 22 Fig. 23

Claims (1)

[Claims] 1. First, anchor pins are driven into the floating portions (a) of the unit grid marked on the mortar outer wall (M) to a depth that reaches the concrete frame (C) from the mortar outer wall (M). A hole (22) is drilled, and then a groove for expanding the tip (
A hollow anchor pin (P) is irremovably driven into the above-mentioned driving hole (22) so that a part of the opening of 17) faces a portion of the required thickness (W) in the mortar outer wall (M). A nozzle (15) for injecting adhesive is then removably connected to the proximal end of the fixed anchor pin (P), and epoxy resin, By injecting and filling adhesive (B) such as polymer cement slurry, the adhesive (B) is applied from the groove (17) to the area around the anchor pin (P), the mortar outer wall (M) and its concrete frame ( C) A building exterior wall repair method characterized by causing leakage to spread between the two. 2. In order to inject and guide the adhesive (B) to the floating part (a) of the unit grid marked on the mortar outer wall (M) in advance, the concrete frame (C) is poured from the mortar outer wall (M).
) is a hollow anchor pin (P) that is driven and fixed into the anchor body (11) made of stainless steel pipe or other rust-free metal pipe, and a plug (12) of steel ingot that is inserted and set inside the anchor body (11). The anchor body (11)
A nozzle connection pipe (13) is provided at the base end of the nozzle (13) which is removably connected to the adhesive injection nozzle (15), while a claw ring (13) for biting into the concrete frame (C) is provided at the tip end of the nozzle (13). 18) and the tapered sloped step surface (19) for receiving the plug (12) are plastically worked, and when the anchor body (11) is also cast into the body surface of the anchor body (11) and fixed to the concrete frame (C). , a dividing groove (17) of a certain length (L2) whose opening part is exposed toward a part of the required thickness (W) in the mortar outer wall (M).
) An anchor pin for repairing the exterior wall of a building, characterized by having an opening formed therein. 3. The nozzle connection port tube (13) of the anchor body (11) is formed to protrude to have a larger diameter than the reference body surface of the anchor body (11), and the large diameter nozzle connection port tube (13) is removed. 3. An anchor pin for repairing an outer wall of a building according to claim 2, characterized in that the split grooves (17) are arranged in an open arrangement with a constant length (L2) extending substantially over the entire reference body surface.