JP3448282B2 - How to fill the void at the pipe installation location - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe for drawing a lead wire such as an electric wiring, a gas pipe, a telephone line, or an optical fiber into a building, and a through hole provided with the pipe. The present invention relates to a method of filling a gap at a pipe installation location for filling a gap with the above. 2. Description of the Related Art Conventionally, when a service line such as an electric wiring is drawn into a building from the outside of a building such as a building to the inside of the building, a through hole (a core opening hole portion) that opens to the outside and the inside of a wall of the building. ) Is formed, a pipe is installed in this through-hole, and the lead-in wire is introduced into the pipe from the outdoor opening of the pipe, and the lead-in wire is led out from the indoor opening of the pipe, thereby forming the lead wire of the building. They are being introduced indoors. When the drawing pipe is buried underground and installed as described above, a gap is formed between the inner surface of the through hole and the pipe, and water such as rainwater enters the room from outside to inside through the gap. Therefore, a gap between the inner surface of the through hole and the outer surface of the pipe is filled with a waterproof layer. Conventionally, when forming such a waterproof layer, cement and a waterproof resin are mixed to prepare a resin-mixed grout material, and the outdoor opening and the indoor opening of the void are made of concrete or the like. After the blockage, the grout material is injected into the gap to fill the gap, and the filled grout material is cured in the gap to form a waterproof layer. [0004] However, in the above waterproof layer, the grout material contracts when it hardens, causing cracks, and cracks occur in the grout material due to underground fluctuations and vibrations. There was a problem that performance was low. [0005] The present invention has been made in view of the above points, and it is an object of the present invention to provide a method of filling a gap in a pipe installation location, which can enhance waterproof performance. According to a first aspect of the present invention, there is provided a method of filling a gap in a pipe installation location, comprising the steps of:
Is formed, and a pipe 3 is installed in the through hole 2.
Is a method of filling a void 4 between the inner surface of the pipe and the outer surface of the pipe 3 by mixing a cement and a waterproofing resin to prepare a grout material 5, closing an outdoor opening of the void 4, and then indoors. The grout material 5 is injected and filled into the space 4 at the back, and then
The waterproofing resin 6 is injected into the interior of the gap 4 from the indoor side, and the grouting material 5 filled in the void 4 is moved to the interior side by this injection pressure, and the waterproofing resin 6 is filled into the interior of the gap 4. The grout material 5 is injected into the interior of the gap 4 from the indoor side, and the grout material 5 and the waterproof resin 6 filled in the gap 4 are moved to the interior side by this injection pressure, and the grout material 5 is filled into the interior of the gap 4. It is characterized by doing. An embodiment of the present invention will be described below. The grout material 5 used in the present invention is a mixture of cement and a waterproof resin. Any cement material such as Portland cement can be used as the cement. The waterproofing resin is mainly composed of a thermoplastic resin emulsion. Specifically, Naruse Chemical Co., Ltd.
"Nalphalt-C" (viscosity 500 cps (20
℃), pH 7 ± 1) and “Nallite” (viscosity 30000)
cps (20 ° C.), pH 7 ± 1, concentration 50 ± 2 wt%,
Specific gravity 1.03) can be used, but in the present invention, it is preferable to use “Nalphalt-C”. Then, a viscous grout material 5 can be prepared by mixing cement, a waterproofing resin, and water. 5% by weight of resin for waterproofing based on the amount of cement
It is preferable that the cement concrete 10k
The grout material 5 can be prepared by mixing 5% by mass of the waterproofing resin and 20% by mass of water with respect to g. And
The grout material 5 is adjusted to a viscosity such that it does not flow down by its own weight when it is filled into the through hole 2 by filling.
Further, the grout material 5 is in the shape of a rice cake and has a very high viscosity and density and is hardly diluted with water, so that the water stopping effect can be enhanced. The grout material 5 of the present invention has almost no cracks due to shrinkage on curing due to the waterproof resin. As shown in FIG. 1 (a), a pipe 3 for drawing in electrical wiring and the like is disposed in a through hole 2 formed in a wall 1 of a building and is buried underground. The through hole 2 is formed so as to penetrate the wall 1 in the thickness direction, and is opened on both the indoor side and the outdoor side of the building. In FIG. 1, the building wall 1 is composed of an underground side wall 1a of the building skeleton and a continuous wall 1b formed adjacent to the outdoor side of the underground side wall 1a. The wall 1 of the building may be constituted only by 1a. In addition, as shown in FIG. 1, when the underpass wall 10 on which the main wiring such as the electric wiring is disposed is on the outdoor side of the building wall 1, the through hole 2 is penetrated to the underpass wall 10. Make it open in the underpass. As the pipe 3, a vinyl chloride resin pipe or a steel pipe can be used. Further, the pipe 3 is arranged such that one end thereof is flush with the indoor side wall surface of the building wall 1, and the other end of the pipe 3 is protruded from the outdoor opening of the through hole 2 into the underground passage. And leads to manholes. Then, at the outdoor side end of the through hole 2, the waterproof concrete 11 is driven and hardened over the entire circumference between the inner surface of the through hole 2 and the outer surface of the pipe 3, thereby penetrating substantially the center of the through hole 2. The pipe 3 is disposed and fixed as described above, and the opening on the outdoor side of the through hole 2 is closed with the waterproof concrete 11. By thus installing the pipe 3 in the through hole 2, the A space 4 is formed between the inner surface and the outer surface of the pipe 3, and the opening of the space 4 on the outdoor side is closed by waterproof concrete 11. The filling of the gap 4 formed at the place where the pipe 3 is installed with the waterproof layer 7 is performed as follows. First, the primer 12 is sufficiently applied to the inner surface of the through hole 2 and the outer surface of the pipe 3 over the entire surface. As shown in FIG. 1A, the primer 12 can be applied by inserting a spatula 13 from an opening on the indoor side of the gap 4 (an opening on the indoor side of the through hole 2). As the primer 12, for example, an asphalt-based primer can be used, and specifically, Nalphalt-K manufactured by Naruse Chemical Co., Ltd. can be used. Next, as a primary injection, the grout material 5 is injected and filled into the interior of the gap 4 (near the indoor side of the waterproof concrete 11). The grout material 5 is injected as shown in FIG.
As shown in FIG. 3A, the nozzle 14 is inserted into the gap 4 from the opening on the indoor side, and the nozzle 1 is inserted through the hose 20.
The grout material 5 is fed from the tank 22 of the low-pressure injector 15 connected to the nozzle 4 and supplied to the nozzle 14, and the grout material 5 is discharged from the tip of the nozzle 14 located at the back of the gap 4. it can. In order to position the nozzle 14 at the back of the gap 4, the tip of the nozzle 14 is once abutted against the indoor side of the waterproof concrete 11 at the back, and
Is preferably pulled out by about 1 cm to retract. As the low-pressure injector 15, for example, a hand-operated mortar pump or an electric low-pressure mortar pump can be used. The grout material 5 is, for example, 127 Pa (13
The pressure can be injected under a pressure of about kgf / m ² ), and this pressure can be appropriately set according to the viscosity of the grout material 5 and the like. Further, the grout material 5 is filled so as to surround the outer periphery of the pipe 3 at the back of the gap 4, and the graft material 5 is filled at about ３ of the back of the gap 4. The through hole 2 for arranging the pipe 3 is located underground 2
m or more in most places, and when the outdoor water level is high, there is naturally water leakage / leakage from the gap between the underground passage wall 10 and the underground side wall 1a and the continuous wall 1b. It was impossible. However, in the present invention, since the grout material 5 is prepared in the form of a rice cake with a waterproofing resin, even if there is water discharge or water leakage, the grout material 5 can be injected without fail. After the grout material 5 is injected from the indoor side of the building into the interior of the cavity 4 and filled as described above, the waterproofing resin 6 is injected from the indoor side into the interior of the cavity 4 and filled as a secondary injection. I do. As the waterproofing resin 6, the same resin used when preparing the grout material 5 can be used.
The injection of the waterproofing resin 6 uses the low-pressure injector 15 and the nozzle 14 used in the primary injection. That is, the grout material 5 is injected by the primary injection until the tank 22 of the low-pressure injection machine 15 becomes empty, and then the waterproofing resin 6 is added to the empty tank 22.
Then, as shown in FIGS. 1 (c) and 3 (b), the waterproof resin 6 in the tank 22 is pressure-fed by the low-pressure injector 15 through the hose 20 and supplied to the nozzle 14, and the gap 4 From the tip of the nozzle 14 located at the back of the
Is ejected. Then, by injecting the waterproofing resin 6 into the interior of the gap 4 in this manner, the primary injected grout material 5 is pressed and moved from the outdoor side to the indoor side by the injection pressure of the waterproofing resin 6 while being waterproofed. The filling resin 6 is filled in the space 4. Therefore, the waterproofing resin 6 is filled so as to surround the outer circumference of the pipe 3 between the grout material 5 and the waterproof concrete 11 filled in the gaps 4 by the primary injection. In addition, the length of the waterproof resin 6 filled in the gap 4 (the length in the thickness direction of the wall 1) is 10
The waterproofing resin 6 can be injected so as to have a thickness of about 0 mm, but the length can be appropriately changed depending on the thickness of the wall 1. Further, the grout material 5 which has been primarily injected is moved to a substantially central portion of the gap 4 by the injection of the waterproofing resin 6 and the underground side wall 1 is formed.
a and a portion of the grout material 5 that has been primarily injected is located near the boundary between the continuous wall 1a and the continuous wall 1b.
a to the gap 16 between the continuous wall 1b,
The gap 16 is filled with the grout material 5 in the vicinity of the gap 4. At this time, even when water flows out or leaks, the grout material 5 can be covered with the high viscosity and high watertightness. After the waterproof resin 6 is injected into the interior of the gap 4 and filled from the indoor side of the building as described above, the waterproof resin 6 is contained in the concrete or cement of the wall 1 or the grout material 5. It hardens due to a chemical reaction between the alkaline earth metal ions such as calcium ions and polyvinyl alcohol which is an emulsifier of the waterproofing resin 6. That is, when the alkaline earth metal ion reacts with the emulsifier, the function of the emulsifier, that is, the ability to form a protective colloid is lost, and the emulsifier is lost from the polymer of the waterproof resin 6. As a result, the adhesion and fusion of the polymer particles begin to form a polymer block or the like, and the waterproofing resin 6 is cured. As described above, after the waterproofing resin 6 is injected and before the waterproofing resin 6 is cured, the grout material 5 is injected from the indoor side into the interior of the gap 4 and filled therein as a tertiary injection. The same grout material 5 as that used at the time of the primary injection can be used. The grout material 5 was injected by the low-pressure injection machine 1 used in the primary injection and the secondary injection.
5 and the nozzle 14 are used. That is, after the waterproofing resin 6 is injected by the secondary injection until the tank 22 of the low-pressure injection machine 15 becomes empty, the grout material 5 is put into the empty tank 22, and thereafter, FIG. 2 (a) and FIG. As shown in FIG.
The grout material 5 in the tank 22 is pumped through the hose 20 by the low-pressure injector 15 and supplied to the nozzle 14, and the gap 4
The grout material 5 can be discharged from the tip of the nozzle 14 located at the back of the nozzle. By injecting the grout material 5 into the interior of the gap 4 in this manner, the primary injected grout material 5 and the secondary injected waterproof resin 6 are exposed to the outdoor pressure by the tertiary injected grout material 5 injection pressure. The grout material 5 of the tertiary injection is filled into the inside of the gap 4 while being pressed and moved from the inside to the indoor side. Therefore, the grout material 5 of the tertiary injection is made of the waterproof resin 6 and the waterproof concrete 1.
1 to fill the outer periphery of the pipe 3. Further, the grout material 5 of the tertiary injection is also filled in about 1/3 of the depth of the gap 4. Further, as shown in FIG. 2B, the waterproofing resin 6 is moved to a substantially central portion of the gap 4 by the grout material 5 of the tertiary injection and is located near the boundary between the underground side wall 1a and the continuous wall 1b. However, as a result, a part of the waterproofing resin 6 flows into the gap 16 between the underground side wall 1a and the continuous wall 1b, and the gap 16 is filled with the preventing resin 6 near the gap 4. After the primary injection to the tertiary injection as described above, the grout material 5 in the gap 4 is cured and cured without giving vibration and dust, so that the grout material 5 is formed.
And a layer of a cured product of the waterproofing resin 6 form a waterproof layer 7 which is formed adjacently. Thereafter, as shown in FIG. 2 (c), a polymer cement mortar 19 is filled in the interior side end of the cavity 4 before the primary grout material 5 (indoor side) and hardened, and the interior side of the cavity 4 is (The opening on the indoor side of the through hole 2) is closed. In addition, 21 is a trowel. In this way, the gap 4 formed at the pipe installation location can be filled with the waterproof layer 7. In the present invention, the gap 4 is filled with the grout material 5, the waterproof resin 6, and the grout material 5 in this order, and a waterproof resin layer 6 is provided between the grout material 5 layers to form the waterproof layer 7. Even if cracks occur in the grout material 5 due to shrinkage due to underground fluctuations or vibrations, water such as rainwater that has entered the cracks from the outside is prevented from entering the indoors with the cured product of the waterproofing resin 6 even if cracks occur due to underground fluctuations or vibrations. , And the waterproof layer 7 can be improved in the prevention performance. Further, since the grout material 5 and the waterproof resin 6 were filled in the gap 16 between the underground side wall 1a and the continuous wall 1b, the gap 1 was
6 and waterproof concrete 11, rainwater can be prevented from entering, leaking and leaking into the room, and the waterproofness can be further improved. In the prior art, when the grout material was filled in the through-hole, a void was formed in the upper portion of the through-hole by leveling, breathing, etc., but in the present invention, the grout material 5 flows down by its own weight by the waterproof resin. Since it is prepared in the shape of a rice cake with a viscosity that is not so high, leveling or breathing does not occur, and the filling can be surely performed so that no void is formed above the through hole. Further, the grout material 5 of the present invention can increase the degree of adhesion between the inner surface of the through hole 2 and the outer surface of the pipe 3 as compared with the prior art. In addition, in the past, urethane foam is mainly used as a water-stopping material,
In the pipe 3, there is also a weak vinyl chloride resin pipe, which may cause cracks or deformations in the pipe 3 due to the expansion force of the water-stopping material or injection force. Since the pipe 3 is not used, it is possible to prevent a trouble such as a crack or deformation from occurring in the pipe 3. As described above, the present invention can enhance the waterproofness, watertightness, adhesion between the wall 1 and the pipe 3, breathing, leveling, crack prevention, water stoppage, and the like. As described above, according to the first aspect of the present invention, a through-hole is formed in a wall of a building and a pipe is installed in the through-hole, and a space between an inner surface of the through-hole and an outer surface of the pipe is provided. Is a method of filling a void, in which a grout material is prepared by mixing cement and a waterproofing resin, and after closing an outdoor opening of the void, the grout material is injected from the indoor side into the back of the void and filled. Then, the waterproofing resin is injected into the interior of the void from the indoor side, and the waterproofing resin is filled into the interior of the void while moving the grout material filled in the void by the injection pressure to the indoor side. The grout material is injected into the interior of the gap from the indoor side, and the grout material and the waterproofing resin filled in the gap are moved to the interior side by this injection pressure, and the grout material is filled into the interior of the gap, so between the grout materials. By providing waterproofing resin, Even if water such as rainwater, water seepage, or water leaks from the outside into cracks generated in the grout material, the waterproof resin can block this water from entering the room, thereby increasing the prevention performance. Things.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an example of an embodiment of the present invention, and (a) to (c) are partially broken perspective views. FIGS. 2A to 2C are perspective views with a part cut away. FIGS. 3A to 3C are cross-sectional views. [Description of Signs] 1 wall 2 through hole 3 pipe 4 air gap 5 grout material 6 waterproof resin

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16L 5/02

Claims (1)

(57) [Claim 1] A method for forming a through hole in a wall of a building, installing a pipe in the through hole, and filling a gap between an inner surface of the through hole and an outer surface of the pipe. Then, a grout material is prepared by mixing cement and a waterproofing resin, and after closing the outdoor opening of the void, the grout material is injected from the indoor side into the interior of the void and filled, and then the waterproofing resin is filled. Is injected from the indoor side into the back of the gap, and the waterproofing resin is filled into the back of the gap while moving the grout material filled into the gap with the injection pressure to the indoor side,
A pipe installation characterized by injecting a grout material from the indoor side into the interior of the gap, and filling the grout material into the interior of the gap while moving the grout material and the waterproofing resin filled in the gap by the injection pressure to the interior side. How to fill the gaps in the location.