JP4310212B2 - Filling through holes in buildings - Google Patents

Description

  The present invention relates to a hole filling method for filling a through hole provided for penetrating a pipe, a duct or the like in a structural member such as a building wall by filling mortar.

  The housing, which is a component of the building of the nuclear power plant and the reprocessing plant, has openings with several thousand through holes per plant in order to allow piping and equipment to penetrate. After the installation, the opening is closed by a method of closing the opening (hereinafter referred to as a hole filling) method (hereinafter referred to as a hole filling method) selected according to the requirements for the housing of the penetrating portion. In view of shortening the construction period of the plant, it is desirable that the hole filling work be quick and efficient.

Various methods are employed for filling the hole in accordance with the conditions required for the housing, but the mortar filling method is effective for a plurality of required conditions such as shielding, watertightness, airtightness and fire prevention. Of the mortar filling points, mortar filling properties are required at the required points such as shielding, watertightness, airtightness, fire prevention, etc. In particular, in the radiation shielding requirements, from the viewpoint of radiation protection, when filling the opening space with mortar, the mortar is surely filled, and the specific gravity of the mortar after curing satisfies 2.15 g / cm ³ or more. It is a necessary condition.

  However, when filling the opening with mortar at the time of filling the hole, if air remains in the through hole, a void is formed in the opening after the mortar is cured, and the filling property of the mortar is lowered. Is an important point. In particular, the upper part of the opening portion tends to generate voids, and countermeasures are required.

  The following methods exist as hole filling methods for filling mortar into through holes.

(1) Hole filling method by hand-packing (manual work) This construction method is generally adopted in the places where mortar is filled among the filling holes in the through openings of piping and equipment of nuclear power plants and reprocessing plants. This is a method that involves kneading mortar into a spherical shape and filling it manually. This construction method is excellent in terms of certainty of mortar filling in the space part because it is filled with hard mortar by sequentially stacking it in the space part manually, but it is necessary for filling work The man-hour is large. Also, in narrow spaces, the operator does not come close and it is difficult to fill the hole. As a countermeasure, it was necessary to establish an efficient construction method.

(2) Cavity filling method by pouring This construction method is often used in architecture. In the case of a wall surface, plates called molds are attached to both ends of the opening, and in the case of a floor surface, only the lower surface of the opening is attached. The formwork functions as a temporary closing plate so that the mortar does not flow out of the opening when filled with the mortar.

  Taking the wall as an example, the mold is first placed and temporarily closed on one side of the opening, and then a square hole for filling (pouring) mortar is provided in the upper part of the opening on the opposite side. Is temporarily closed with a formwork. Mortar is poured into a bucket or container and poured from a square hole to fill the space. This is the filling method by pouring. In the conventional method, the formwork was made of wood or iron.

  Compared to the hole filling method by hand filling (manual work), the number of man-hours required for the hole filling work is small, but there is a problem that the mortar filling state inside the opening cannot be confirmed from the outside due to the installation of the mold when filling the mortar. Also, after filling and curing the mortar, it was necessary to remove the mold and repair the surface, which also required a lot of man-hours.

(3) Although not a hole filling method, the following methods are known for filling mortar into molds using a pump.

  That is, concrete is pumped and filled into the inside of the frame from a relatively lower part by a pump, and along with the filling, the air in the frame is exhausted from the relatively upper part of the frame to improve the filling property (for example, Patent Document 1).

  Furthermore, it is intended for test specimens, but a transparent acrylic plate is used as a mold to assemble the mold in the same shape as the external shape of the bolt box, and the mold is filled with mortar from a relatively lower position by a pump. Further, it is known that air in the mold is exhausted from the upper side corresponding to the filling from the upper side so that the filling status can be visually confirmed through the mold (for example, patent document). 2).

JP 2002-227595 A JP 2000-128611 A

  Although the conventional technology has high mortar filling properties, it is a construction method that cannot be improved in efficiency, or it can be improved to some extent, but it is difficult to check the mortar filling situation, and there are advantages and disadvantages . In addition to the hole filling method, the filling method of the mortar into the mold by a pump is well known, but even if the mortar is filled with the pump, it is solidified in a mixed state of air, or shrinks at the time of solidification, resulting in a gap. This method was not simply adopted in the hole filling method.

In short, the following problems can be mentioned with respect to the burying portions of the through openings such as piping and ducts of nuclear power plants and reprocessing plants.
(1) Since there is no process likelihood at the time of hole filling construction, it is necessary to improve the efficiency of hole filling work.
(2) For required parts such as shielding, watertightness, airtightness, fire prevention, etc., it is required to ensure the filling of the mortar. For this purpose, establishment of a method for reliably removing the air remaining in the space. is required.
(3) It is an indispensable condition that a specific gravity of 2.15 g / cm ³ or more is satisfied particularly for a shielding requirement portion.

  An object of the present invention is to provide a hole-filling method that realizes the efficiency of hole-filling work with mortar, ensuring filling performance, and improving reliability.

As a means for solving the problems of the present invention, a hollow structure is passed through a through-hole provided in a building through a building in a lateral direction, and a mold frame through which the hollow structure passes is formed in the through-hole. Attach to both ends, and then fill the through hole with mortar so that there is a space above the hollow structure in the through hole and between the uppermost surfaces in the through hole, and the filled mortar is cured After that, a method of filling the through hole of the building is adopted in which the space remaining in the through hole is filled again with mortar.

  Furthermore, in the concrete means according to the embodiment for solving the problems of the present invention, as a measure for improving the efficiency of the hole filling work, the filling point of the through opening of the nuclear power plant and the reprocessing plant such as the piping / equipment of the through opening is made. Of these, the mortar filling location uses a self-priming / pumpable pump to pump the mortar and fill the space (hereinafter referred to as the mortar pump construction method) to improve the filling performance of the filling location. As countermeasures, the following two construction methods that allow air to be removed from the space are provided.

That is, (1) When mortar filling is performed using a pump capable of self-priming and pumping particularly in places where the filling property is strictly required, once the mortar is placed at a position about 50 mm to 200 mm below the upper surface of the opening. After the filling is stopped and the filled mortar is cured, the kneaded mortar is formed into a spherical shape and filled into the space with an indentation jig or the like (hereinafter referred to as the double casting method).
(2) Although not as rigorous as (1), when mortar filling is performed using a self-priming / pressure-pumpable pump in places where filling properties are required, air vents (hose / piping / opening) are provided on both sides of the opening. Etc.), and a method of improving the filling property by releasing the air remaining in the space from there (hereinafter collectively referred to as the air vent hose method).
(3) As a measure to ensure the reliability of the burial location, an acrylic plate or tempered glass is applied as a mold to be attached to both ends of the opening in the mortar burial location, and the mortar filling status can be confirmed from the outside during mortar filling. Provide construction methods.

  As described above, according to the present invention, the filling property of the mortar that fills the hole formed in the concrete structure is improved, so that the effect of improving the shielding performance at the hole portion can be obtained.

Embodiments of the present invention will be described below with reference to the drawings.
1. Example of Double Punching Method This construction method is a method of filling mortar into two portions in two portions. In the following, as an example of the present invention, a method of filling mortar in two steps will be described, but a method of filling in mortar in two or more times according to the size of the opening is also included. It is a waste. Moreover, in this construction method, a non-shrink mortar is used on the assumption that the requirement for ensuring the filling property is strict, but it is also possible to use a normal mortar depending on the requirements for ensuring the filling property. Furthermore, a normal mortar is used for filling at the time of pumping, and a non-shrinkable mortar can be used as a mortar in which the mortar has solidified and is filled in the space above the opening.

  FIG. 1 is a perspective view of a pipe penetration opening (wall). In the following, as an embodiment of the present invention, a description will be given using a wall constituting a building, that is, a wall portion of a pipe penetration angle opening which is a through hole provided penetrating through the housing 11 of the building. It includes not only pipe penetrations, but also through openings such as equipment and ducts, temporary openings for construction, and the like. Moreover, not only a square opening part but a round hole part is also included. Furthermore, not only a wall part but a floor (ceiling) part etc. are included. A hollow structure such as a pipe through which a fluid flows, a pipe through which an electric wire passes, a duct through which a cable passes, and a duct through which air flows is passed through the pipe penetrating portion.

  A square opening 12 is set as a through hole with square openings at both ends in the building 11 of the building of the nuclear power plant and the reprocessing plant, and an L-shape called a corner angle 13 is formed around the corner opening 12. Steel is installed. The corner angles 13 are set in advance when the casing 11 is constructed, and are set on both sides of the corner opening 12. A pipe 14 is installed inside the corner opening 12. Forms 15 are attached to both sides of the corner opening 12 before mortar filling. The mold 15 is made of an acrylic plate or tempered glass, and has a structure in which the mortar filling state inside the corner opening 12 can be confirmed from the outside during mortar filling. In this construction method, since the upper part of the corner opening 12 is filled with mortar later, the mortar filling state of the upper part can be confirmed. Therefore, the mold 15 can be applied as wooden or iron.

Depending on the size, the mold 15 is provided with reinforcement as necessary so that the mold does not bend or deform when filled with mortar. Further, the mold 15 may be divided so that it can be easily attached, and the divided molds may be combined and installed in the opening. The position where the pipe 14 is set with respect to the position of the corner opening 12 is measured, and a round hole 16 for pipe penetration is provided in the mold 15. The round hole 16 is opened a few millimeters larger than the outer diameter of the pipe 14, and when filling the mortar, the gap between the pipe 14 and the round hole 16 is a waste cloth so that the mortar does not flow out of the square opening 12. Close with tape or tape.

The mold 15 does not cover the entire height of the corner opening 12, but covers the lower position from the upper surface of the corner opening 12 to a position lower by about 50 mm to 200 mm, and the upper surface of the mold 15 and the upper surface of the corner opening 12 are covered. A space 17 exists between the two. This space portion 17 functions as an air vent for discharging the air remaining in the corner opening 12 to the outside of the corner opening 12 when the corner opening 12 is filled with mortar (the first function of the space portion 17). ). It is assumed that the size of the space portion 17 can be changed according to the size of the corner opening 12. In addition, depending on the size of the corner opening 12, a method in which the mold 15 covers the entire surface of the corner opening 12 by providing a hose, piping, opening, and the like and setting the air venting location to an appropriate place is also possible.

  FIG. 2 is a front view showing details of a corner angle and a joint part of a formwork. A steel material 21 is attached in three directions of left, right, and lower part of the formwork 15 and the steel material 21 is welded to the corner angle 13 and welded 18. The frame 15 is fixed.

Fig. 3 is a side view of a through-hole opening (wall) of a pipe, and Fig. 4 is an enlarged side view of the corner angle and the formwork connection part of Fig.3. A hole 41 is provided, and similarly a threaded hole 42 is provided in the steel material 21, and both are fixed by a threaded bolt 32. In fixing the formwork 15, in the reinforced concrete construction, a method of pulling the formwork using a separator that is used to accurately maintain the distance between the formwork and fixing the formwork 15 between the walls, By dividing the upper and lower molds into a vertical line with a horizontal line passing through the center of the round hole 16 and aligning the pipes 14 in the round holes 16 from above and below and fixing them with bolts, The method of doing etc. is applicable.

  FIG. 3 is a side view of a pipe penetration angle opening (wall), in which a suction side nozzle 36 of a pump 35 capable of self-priming and pressure feeding and a hopper 38 for mortar filling are connected via a hose 37. At this time, the pump 35 is self-priming, but the hopper 38 is preferably installed at a higher position than the pump 35, and it is more preferable that the non-shrink mortar flows into the pump 35 by its own weight. It is more desirable that the hose 37 be as short and linear as possible.

  The discharge-side nozzle 34 of the pump 35 and the hose 33 are connected, and the hose 33 is inserted into the square opening 12 from the upper side of the previously set mold 15. When mortar is injected from the hopper 38 and the pump 35 is switched on and the pump 35 is started, the non-shrink mortar is pumped and filled into the square opening 12 via the hose 37 and the hose 33. The mortar is filled up to the mortar filling level 19 which is lower than the mortar overflow level 39 from which the mortar flows out from the corner opening 12, the switch of the pump 35 is stopped, and the hose 33 is pulled out. In addition, the method of repairing a wall part by cutting | disconnecting by the wall surface without pulling out the hose 33 is also possible.

  The pump 35 is capable of self-priming and pumping, and a commercially available pump can be applied as long as it is a pump capable of pumping a viscous fluid. The pump 35 is selected in consideration of the size (filling amount) / position of the square opening 12 and the workability on site. Considering on-site hand links, it is more desirable to be as light as possible and easy to carry. Further, the hose 33 and the hose 37 that are not crushed by the suction by the pump 35 are used. As for the hose 33 and the hose 37, piping is also applicable according to the construction situation.

  Fill the mortar to a mortar filling level of 19 and leave it for several days. After the non-shrink mortar has hardened, remove the weld 18 and remove the mold 15 and mold the kneaded non-shrink mortar into a spherical shape. The space 17 above the corner opening 12 is filled with a tool or the like. At this time, the space portion 17 serves as a filling port for the non-shrink mortar (second function of the space portion 17).

  Note that a construction method in which the formwork 15 is not temporarily installed for construction and is not removed as a main product is also possible. In this case, for the mold 15 set in a high radiation dose area where humans cannot enter, in the unlikely event that the acrylic plate or tempered glass is damaged, the mortar will not cause problems due to scattered fragments. After filling and solidifying, attach a stainless steel plate to the outside of the acrylic plate or tempered glass and take measures to prevent scattering. A stainless steel or carbon steel plate is attached to the outside of the acrylic plate or tempered glass as necessary for the formwork 15 set in a human accessible area.

According to the present embodiment, there are the following effects.
(1) By using the self-priming / pumpable pump 35, the hole filling work efficiency is improved. In addition, mortar filling work can be performed even in narrow spaces.
(2) By providing the space portion 17 in the upper part of the corner opening 12, an air venting function is added, and it becomes possible to prevent an unfilled portion due to the generation of a gap portion, and the filling property is improved.
(3) By filling the non-shrinkable mortar in two steps, the prevention of voids that are likely to occur particularly in the upper part of the corner openings 12 is promoted, and the filling property is improved.
(4) By using an acrylic plate or tempered glass for the mold 15, it becomes possible to confirm the mortar filling state inside the corner opening 12 from the outside, which leads to ensuring reliability.
(5) By using the pump 35 capable of self-priming and pumping a viscous fluid, the space of the angular opening 12 can be filled without the mortar being dissociated by the pulsation of the pump 35, and the mortar after curing The specific gravity of 2.159 / cm ³ or more can be secured.
(6) When the pre-filled mortar is filled from the bottom of the square opening 12 to the position of the mortar filling level 19, the pipe 14 is buried by the mortar, and the pipe wrap around the pipe before the pre-filled mortar solidifies. Is closely packed. Even after the pre-filled mortar has solidified, the post-fill mortar is filled from the mortar filling level 19 upward, and since the mortar has already been densely filled around the pipe 14, it is solidified. There is no need for precise filling of mortar, and a hole filling operation can be performed quickly and without gaps with high shielding reliability.
2. Next, an air venting hose method proposed by the inventor in addition to the above-described double driving method will be described below as a reference example.
This construction method is a method for improving the filling property by installing an air vent part on the mold to vent the air. In the following, as an embodiment of the present invention, a method of installing a hose with a round hole on one side of the mold and installing a tapered opening on the other side of the mold will be described. And a method of installing tapered openings on both sides. Moreover, the construction method which uses piping instead of a hose is also included. In addition, the mortar used by this construction method selects and uses a normal mortar or a non-shrink mortar according to the requirements of a filling property.

FIG. 5 is a perspective view of the pipe through opening (wall). Hereinafter, as a reference example , a description will be given using a wall portion of a pipe penetration angle opening, but it does not necessarily include not only a pipe penetration portion, but also a through opening portion of equipment, a duct, a temporary opening portion for construction, and the like. Moreover, not only a square opening part but a round hole part is also included. Furthermore, not only a wall part but a floor (ceiling) part etc. are included.

An angular opening 12 is set in the housing 11, and an L-shaped steel material called a corner angle 13 is installed around the angular opening 12. The corner angles 13 are set in advance when the casing 11 is constructed, and are set on both sides of the corner opening 12. A pipe 14 is installed inside the corner opening 12. A mold 51 and a mold 53 are attached to both sides of the corner opening 12 so as to block both sides of the corner opening 12. The mold 51 and the mold 53 are made of an acrylic plate or tempered glass, and have a structure in which the mortar filling state inside the corner opening 12 can be confirmed from the outside during mortar filling.

  The position where the pipe 14 is set with respect to the position of the corner opening 12 is measured, and a round hole 56 for penetrating the pipe is provided in the mold 51 and the mold 53. The round hole 56 is opened a few millimeters larger than the outer diameter of the pipe 14. When filling the mortar, a gap between the pipe 14 and the round hole 56 is provided so that the mortar does not flow out of the square opening 12. Close with waste cloth or tape. The formwork 51 covers the entire surface of the corner opening 12, is provided with a round hole in the upper part, and a hose 52 for venting air is installed from the inside of the corner opening 12 to the outside. The mold 53 covers the lower side from the upper surface of the square opening 12 to a position lower by about 50 mm to 200 mm, and the top side of the mold 53 is connected to the tapered portion 54. The taper portion 54 extends about 100 mm from the upper surface of the square opening 12 and also serves as three functions of a mortar filling port / air venting / overflow mortar receiving portion. These numerical values can be changed according to the size of the opening.

  FIG. 6 is a front view showing details of the joint portion between the corner angle 13 and the formwork 51. The steel material 61 is attached to the periphery of the formwork 51 and the left, right, and lower sides of the formwork 53, and the steel material 61 is attached to the corner. The mold 51 is fixed by welding 55 to the angle 13. Also, the mold 53 is fixed in the same manner.

  FIG. 7 is a side view of the opening portion (wall) of the pipe penetration angle, and FIG. 8 is an enlarged side view of the joint portion between the corner angle 13 and the mold frames 51 and 53 of FIG. Is provided with a threaded hole 81 in the plate thickness portion, and similarly provided with a threaded hole 82 in the steel material 61, and both are fixed by the threaded bolt 32. In addition, in the fixing of the mold 51 and the mold 53, in the reinforced concrete work, a method of pulling the mold using a separator that is used to accurately maintain the interval between the molds, and fixing it with the wall between, The molds 51 and 53 are divided into upper and lower parts with a horizontal line passing through the center of the round hole 56 as a boundary, and the upper and lower parts of the molds are aligned from above and below so that the pipe 14 can be accommodated in the round hole 56 and fixed with bolts. A method of using the sheet molds 51 and 53 is also applicable.

  FIG. 7 is a side view of a pipe penetration angle opening (wall), in which a suction side nozzle 36 of a pump 35 capable of self-priming and pressure feeding and a hopper 38 for mortar filling are connected via a hose 37. At this time, the pump 35 is self-priming, but the hopper 38 is preferably installed at a higher position than the pump 35, and it is more preferable that the mortar flows into the pump 35 by its own weight. It is more desirable that the hose 37 be as short and linear as possible.

The discharge side nozzle 34 of the pump 35 and the hose 33 are connected, and the hose is inserted into the square opening 12 from above the taper portion 54 of the previously set formwork. The taper portion 54 of the mold is configured as a mortar storage location by providing an acrylic plate at an upper end of the mold 53 with an inclined downward slope toward the inside of the square opening 12 as shown in FIG. When mortar is injected from the hopper 38 and the pump 35 is switched on and the pump 35 is started, the mortar is pumped and filled into the square opening 12 via the hose 37 and the hose 33. Even if the mortar overflows from the hose 52 into the container 84, the mortar is continuously filled. When the mortar is filled up to the mortar filling level 19 on the upper surface of the taper portion 54, the pump 35 is turned off and the pump 35 is stopped. Then, the hose 33 and the hose 52 are pulled out. In addition, the method of repairing a wall part by cutting | disconnecting by the wall surface without pulling out the hose 33 and the hose 52 is also possible.

  The pump 35 can be self-priming and pumping, and a commercially available pump can be used as long as it can pump a viscous fluid. The pump 35 is selected in consideration of the size (filling amount) / position of the square opening 12 and the workability on site. Considering handling on site, it is more desirable to be as light as possible and easy to carry. Further, the hose 33 and the hose 37 that are not crushed by the suction by the pump 35 are used. The hose 33 and the hose 37 can be applied in place of piping according to the construction situation.

  Fill the top surface of the taper part 54 with mortar and leave it for several days. After the mortar has hardened, remove the weld 55 part and remove the mold frame 51, the mold frame 53 and the taper part 54 to fill the taper part 54. The finished mortar part is finished and the wall surface is finished.

  It is also possible to adopt a construction method in which the mold 51 and the mold 53 are not temporarily installed for construction and are not removed as the main product. At this time, only the taper portion 54 is removed and the mortar portion filled in the taper portion is suspended to finish the wall surface. Further, if necessary, a stainless steel or carbon steel plate is attached to the outside of the acrylic plate or tempered glass of the mold 51 and the mold 53.

According to the present embodiment, there are the following effects.
(1) By using the self-priming / pumpable pump 35, the hole filling work efficiency is improved. In addition, mortar filling work can be performed even in narrow spaces.
(2) By providing the hose 52 at the upper part of the square opening 12, an air venting function is added, it becomes possible to prevent the occurrence of unfilled portions due to the generation of voids, and the filling property is improved.
(3) By providing the tapered portion 54 at the upper portion of the angular opening 12, the filled mortar flows into the angular opening 12. Moreover, since the air venting function is also achieved, it is possible to prevent the occurrence of unfilled portions due to the generation of voids, and the filling property is improved.
(4) By using an acrylic plate or a tempered glass plate for the mold 51 and the mold 53, it is possible to confirm the state of mortar filling inside the corner opening 12 from the outside, thereby ensuring reliability.
(5) By using the pump 35 capable of self-priming and pumping a viscous fluid, the space of the angular opening 12 can be filled without the mortar being dissociated by the pulsation of the pump 35, and the mortar after curing The specific gravity of 2.15 g / cm ³ or more can be secured.
(6) Since the mortar overflows with the air remaining through the hose 52 and enters the container 84, the residual air in the corner opening 12 is reduced, and the mortar stored in the tapered portion 54 is in the corner opening 12. Thus, the mortar filling in the angular opening 12 is achieved densely.

According to the embodiment and the reference example of the present invention, there is an effect of improving the efficiency of the hole filling work by applying the self-priming and pressure-feeding pump to the mortar filling hole filling portion of the through opening such as the piping / equipment. In addition, the double punching method, the air vent hose method, etc. can surely vent the air, and the effect of improving the filling property of the mortar is expected. Furthermore, by using an acrylic plate or tempered glass as a mold, it is possible to check the filling state at the time of mortar filling, and there is an effect of improving reliability.

The pipe 14 in the embodiment and the reference example of the present invention may be replaced with a hollow structure such as a pipe through which a fluid passes, a pipe through which an electric wire passes, a cable or a duct through which air passes, or a plurality of types may be mixed. it can.

It is a perspective view (twice driving method) of the piping penetration angle opening part (wall) by this invention. It is a front view which shows the detail of the corner angle of FIG. 1, and the connection part of a formwork. It is a sectional side view of the piping penetration angle opening part (wall) of FIG. FIG. 4 is an enlarged view of a corner angle of FIG. 3 and a joint part A of a formwork. It is a perspective view (air bleeding hose construction method) of the piping penetration angle opening part (wall) by a reference example . It is a front view which shows the detail of the corner angle of FIG. 5, and the connection part of a formwork. It is a sectional side view of the pipe penetration angle opening (wall) of FIG. It is the figure which expanded the corner angle of FIG. 7, and the connection part A of a formwork.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Housing, 12 ... Square opening, 13 ... Corner angle (steel material), 14 ... Piping, 15,
51, 53 ... Formwork (acrylic plate or tempered glass), 16, 56 ... Round hole, 17 ... Space (also used as a filling port for air venting and double striking), 18 ... Welding, 19 ... Mortar filling level, 21 ... Steel, 32 ... Threaded bolt, 33, 37 ... Hose, 34 ... Pump nozzle (discharge side), 35 ... Pump, 36 ... Pump nozzle (suction side), 38 ... Hopper, 39, 83 ... Mortar overflow level, 41, 81 ... Threaded hole (formwork side), 42,82 ... Threaded hole (steel side), 52 ... Air venting hose or piping, 54 ... Tapered part (mortar filling port / air venting / overflow mortar receiver), 55 ... welding, 61: Steel, 71: Mortar filling level, 84: Container (for overflow mortar recovery).

Claims (4)

  A hollow structure is passed through a through-hole provided in the building member in a lateral direction, and a mold through which the hollow structure penetrates is attached to both ends of the through-hole. Thereafter, the hollow in the through-hole is installed. The mortar is filled in the through hole so that a space remains above the structure and between the uppermost surfaces in the through hole, and after the filled mortar is cured, the space portion remaining in the through hole is again filled How to fill through holes in buildings where mortar is filled. 2. The method of filling a through hole in a building according to claim 1, wherein the mold is made of a transparent member, and the state of filling of the mortar can be visually confirmed through the mold . 3. The method for filling a through hole in a building according to claim 1 or 2, wherein the mortar is pumped and filled into the through hole with a pump . 2. The mold according to claim 1 , wherein the mold is attached so that an upper end of the mold is lower than an upper surface of the through hole with respect to an opening of the through hole, and the upper end of the mold and the uppermost surface of the through hole The through hole is filled with mortar using a pump so that a space remains above the hollow structure in the through hole and between the uppermost surfaces of the through hole. After the cured mortar is hardened, a method of filling a through hole in a building, in which the space remaining in the through hole is again filled with mortar by hand through the gap .

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