Cut-off construction method between buildings

Abstract

To provide a cut-off construction method capable of suppressing intrusion of groundwater into a building through a gap between an outer wall and piping of the building.SOLUTION: A cut-off construction method between buildings is a cut-off construction method between a pair of buildings arranged side by side, in which piping arranged underground are passed through and which blocks water in a gap between the buildings, comprising: a first boring process for forming a pair of first holes, whose lower ends in a vertical direction are positioned lower than the piping in the vertical direction, by boring portions on both sides of the piping among a sealant arranged in the gap; a second boring process for forming two pairs of second holes, whose lower ends in the vertical direction are positioned lower than the piping in the vertical direction, by boring the sealant; a first filling process for filling a first filler into each of the two pairs of second holes; and a second filling process for filling a second filler having water cut-off performance into each of the pair of first holes, wherein each of the pair of first holes is formed at a position sandwiched between different pairs of the second holes.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a waterproofing method between buildings. [Background technology]

[0002] When underground pipes are laid between adjacent buildings, there is a risk that groundwater may flow into the buildings through gaps between the exterior walls of the buildings and the pipes. Therefore, it is necessary to prevent groundwater from flowing into the buildings. For example, Patent Document 1 proposes a water stop structure that prevents groundwater from flowing into the buildings by providing water stops around the pipes between the buildings. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-255339 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above water stop structure, if a gap occurs between the building and the water stop, groundwater may flow into the area around the pipes through the gap. Therefore, groundwater may flow into the inside of the building through the gap between the exterior wall of each building and the pipes.

[0005] The present invention has been made in consideration of the above-mentioned points, and one of its objects is to provide a water-stopping construction method between buildings that can prevent groundwater from flowing into the interior of a building through gaps between the exterior wall of the building and piping. [Means for solving the problem]

[0006] (1) One aspect of the present invention is a watertight construction method between buildings that has a pipe placed underground passing through it and that waterproofs an underground portion of a gap between the buildings that are arranged side by side in a first direction, the watertight construction method having a first hole drilling step of drilling holes vertically downward in both sides of the pipe in a sealing material that is arranged in the gap to form a pair of first hole portions whose vertically lower ends are positioned vertically lower than the pipe, a second hole drilling step of drilling holes vertically downward in the sealing material to form two pairs of second hole portions whose vertically lower ends are positioned vertically lower than the pipe, a first filling step of filling each of the two pairs of second hole portions with a first filling material, and a second filling step of filling each of the pair of first hole portions with a second filling material having watertight properties, wherein each of the pair of first hole portions is formed at a position sandwiched between a different pair of second hole portions.

[0007] (2) One aspect of the present invention is the waterproofing method between buildings described in (1) above, in which in the first drilling step, holes are drilled in the outer parts of the exterior walls of each of the pair of buildings.

[0008] (3) One aspect of the present invention is a water-stopping construction method between buildings described in (1) or (2) above, wherein in the first drilling step and the second drilling step, the sealing material is drilled by a drilling member rotating about a rotation axis extending in the vertical direction, the drilling member has a plurality of cylindrical drilling portions centered on the rotation axis, the plurality of drilling portions are arranged in a row along the rotation axis, the outer diameter of each of the plurality of drilling portions is larger than the outer diameter of the drilling portion arranged vertically below, and the outer diameter of a first drilling portion arranged vertically furthest below among the plurality of drilling portions is less than the dimension of the gap in the first direction.

[0009] (4) One aspect of the present invention is the water-stopping construction method between buildings described in (3) above, wherein in the first drilling step, the outer diameter of at least one of the multiple drilling portions other than the first drilling portion is larger than the dimension of the gap in the first direction. Effect of the Invention

[0010] According to the present invention, a water-stopping construction method between buildings can be provided that can prevent groundwater from flowing into the interior of a building through gaps between the exterior wall of the building and piping. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a schematic cross-sectional view showing the building and piping of the first embodiment. [Diagram 2] FIG. 2 is a schematic cross-sectional view showing the water stopping structure of the first embodiment, and is a cross-sectional view taken along line II-II in FIG. [Diagram 3] 3 is a schematic cross-sectional view showing the water stopping structure of the first embodiment, and is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] 1 is a flowchart showing a waterproofing construction method between buildings according to a first embodiment. [Diagram 5] 5A to 5C are schematic cross-sectional views showing a first hole drilling step and a second hole drilling step in the first embodiment. [Figure 6] FIG. 4 is a schematic cross-sectional view showing a first filling step in the first embodiment. [Figure 7] FIG. 4 is a first schematic cross-sectional view showing a second filling step in the first embodiment. [Figure 8] FIG. 11 is a second schematic cross-sectional view showing a second filling step in the first embodiment. [Figure 9] 10A to 10C are schematic cross-sectional views showing a first hole drilling step and a second hole drilling step of a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, a water-stopping method between buildings according to an embodiment of the present invention will be described with reference to the drawings. Note that the scope of the present invention is not limited to the following embodiment, and can be modified as desired within the scope of the technical concept of the present invention. In addition, in the following drawings, the scale and number of each structure may differ from the actual structure in order to make each configuration easier to understand.

[0013] In each drawing, the Z axis is indicated as appropriate. The Z axis direction is the vertical direction. The side in the vertical direction toward which the Z axis arrow points (+Z side) is the upper vertical side. The side in the vertical direction opposite to the side toward which the Z axis arrow points (-Z side) is the lower vertical side. In the following description, the upper vertical side may be simply referred to as the "upper side," and the lower vertical side may be simply referred to as the "lower side."

[0014] The first direction D1 shown in each drawing is the direction in which the pair of buildings 11, 12 are lined up. In this embodiment, the first direction D1 is a direction perpendicular to the vertical direction. In the following description, the side toward which the arrow of the first direction D1 points (+D1 side) is referred to as "one side of the first direction D1," and the side opposite to the side toward which the arrow of the first direction D1 points (-D1 side) is referred to as "the other side of the first direction D1."

[0015] The second direction D2 shown in each drawing is a direction perpendicular to both the vertical direction and the first direction D1. In the following description, the side toward which the arrow of the second direction D2 points (+D2 side) is referred to as "one side of the second direction D2," and the side opposite to the side toward which the arrow of the second direction D2 points (-D2 side) is referred to as "the other side of the second direction D2."

[0016] First Embodiment FIG. 1 is a schematic cross-sectional view showing buildings 11, 12 and a pipe 15 of this embodiment. FIG. 2 is a schematic cross-sectional view showing a water stop structure 19 of this embodiment, and is a cross-sectional view taken along II-II in FIG. 1. FIG. 3 is a schematic cross-sectional view showing a water stop structure 19 of this embodiment, and is a cross-sectional view taken along III-III in FIG. 2. As shown in FIG. 1, a pair of buildings 11, 12 are arranged side by side with a gap G in the first direction D1. In this embodiment, the building 12 is arranged on one side (+D1 side) of the building 11 in the first direction D1. Each of the buildings 11, 12 has exterior walls 11a, 12a. The exterior wall 11a and the exterior wall 12a face the first direction D1. The exterior surface of the exterior wall 11a is the exterior surface 11c. The exterior surface of the exterior wall 12a is the exterior surface 12c. The exterior surface 11c and the exterior surface 12c face the first direction D1. The gap G is a space between the exterior wall 11a and the exterior wall 12a. The gap width Wg, which is the dimension of the gap G in the first direction D1, is 50 mm or more and 100 mm or less. In this embodiment, the gap width Wg is 50 mm. The lower part of each of the buildings 11, 12 is located below the ground E. In other words, the lower part of each of the buildings 11, 12 is located underground. The upper part of each of the buildings 11, 12 is located above the ground E.

[0017] The pipe 15 extends in the first direction D1. The pipe 15 is a flow path through which a liquid or a gas flows. The pipe 15 is disposed below the ground E. That is, the pipe 15 is disposed underground. The pipe 15 is disposed above the lower end of the gap G. The pipe 15 passes through each of the opening 11b provided in the outer wall 11a of the building 11 and the opening 12b provided in the outer wall 12a of the building 12. As a result, the pipe 15 passes through a pair of buildings 11 and 12. The number of pipes 15 is not particularly limited, and may be one or more. In this embodiment, the number of pipes 15 is one. The gap between the pipe 15 and the openings 11b and 12b may be sealed by a sealing member such as an O-ring. As a result, it is possible to suppress groundwater from flowing into the inside of the buildings 11 and 12 through the gap between the pipe 15 and the openings 11b and 12b.

[0018] The water stop structure 19 is formed in the gap G. As shown in FIG. 2, the water stop structure 19 is formed by a sealant 20, a first filler 41, and a second filler 42. In this embodiment, the sealant 20 is disposed in the entire gap G. That is, the sealant 20 is disposed from the upper end to the lower end of the gap G, and from the end of the gap G on one side (+D2 side) in the second direction D2 to the end of the gap G on the other side (-D2 side) in the second direction D2. The sealant 20 suppresses direct contact between the building 11 and the building 12. The entire surface of the sealant 20 facing the first direction D1 may be in contact with the exterior walls 11a, 12a, or a part of the surface of the sealant 20 facing the first direction D1 may not be in contact with the exterior walls 11a, 12a. In this embodiment, a part of the sealant 20 is not in contact with a part of the exterior walls 11a, 12a. In this embodiment, the sealant 20 is made of foamed polyethylene. The material constituting the sealing material 20 is not limited to that in this embodiment, and the sealing material 20 may be composed of other materials such as polyurethane foam. The sealing material 20 has a pair of first holes 31 and two pairs of second holes 32 formed therein.

[0019] Each of the pair of first holes 31 is a hole extending downward from the upper end of the sealing material 20. As shown in FIG. 3, when viewed in the vertical direction, each first hole 31 is substantially circular. As shown in FIG. 2, in the vertical direction, the position of the lower end of each first hole 31 is substantially the same as the position of the lower end of the sealing material 20. The lower end of each first hole 31, i.e., the end on the lower side in the vertical direction, is located below the pipe 15. Each first hole 31 is formed at an interval in the second direction D2. Each first hole 31 is formed at a position sandwiching the pipe 15 in the second direction D2. One first hole 31a is located on one side (+D2 side) of the pipe 15 in the second direction D2. The other first hole 31b is located on the other side (-D2 side) of the pipe 15 in the second direction D2. The pair of first holes 31 are formed by drilling holes downward in the sealing material 20 on both sides of the pipe 15 in the second direction D2.

[0020] As shown in FIG. 3, the diameter of each first hole 31 is larger than the gap width Wg. In this embodiment, the diameter of each first hole 31 is approximately 100 mm. A portion of each first hole 31 including an end on one side (+D1 side) of the first direction D1 is formed by drilling the exterior wall 12a of the building 12 downward. A portion of the outer surface of the exterior wall 12a that constitutes the first hole 31 is the exterior wall drilling surface 12d. When viewed from the vertical direction, the exterior wall drilling surface 12d is approximately arc-shaped. A portion of each first hole 31 including an end on the other side (-D1 side) of the first direction D1 is formed by drilling the exterior wall 11a of the building 11 downward. A portion of the outer surface of the exterior wall 11a that constitutes the first hole 31 is the exterior wall drilling surface 11d. When viewed from the vertical direction, the exterior wall drilling surface 11d is approximately arc-shaped. Each of the outer wall drilling surface 11d and the outer wall drilling surface 12d constitutes a part of the first hole portion 31. It is not necessary that each of the outer wall drilling surface 11d and the outer wall drilling surface 12d is formed. In this case, the first hole portion 31 is formed by drilling only the sealing material 20 facing downward, and the diameter of the first hole portion 31 is approximately the same dimension as the gap width Wg.

[0021] As shown in FIG. 2, each of the two pairs of second holes 32 is a hole extending downward from the upper end of the sealing material 20. As shown in FIG. 3, when viewed in the vertical direction, each of the second holes 32 is substantially circular. As shown in FIG. 2, in the vertical direction, the position of the lower end of each of the second holes 32 is substantially the same as the position of the lower end of the sealing material 20. The lower end of each of the second holes 32, i.e., the end on the lower side in the vertical direction, is located lower than the pipe 15. Each of the second holes 32 is formed at an interval in the second direction D2. The pair of second holes 32a is formed at a position sandwiching one of the first holes 31a in the second direction D2. That is, one of the first holes 31a is formed at a position sandwiched between the pair of second holes 32a. Each of the pair of second holes 32a is formed by drilling holes in the sealing material 20 on both sides of one of the first holes 31a in the second direction D2. The pair of second holes 32a is located on one side (+D2 side) of the pipe 15 in the second direction D2. Each of the other pair of second holes 32b is formed at a position sandwiching the other first hole 31b in the second direction D2. That is, the other first hole 31b is formed at a position sandwiched between the other pair of second holes 32b. Each of the other pair of second holes 32b is formed by drilling holes in the sealing material 20 on both sides of the other first hole 31b in the second direction D2. The other pair of second holes 32b is located on the other side of the pipe 15 in the second direction D2. As a result, each of the pair of first holes 31 is formed at a position sandwiched between a pair of second holes 32 different from each other. The two pairs of second holes 32 are formed by drilling holes in the sealing material 20 on both sides of the pair of first holes 31 downward. 3, the diameter of each of the second holes 32 is approximately the same as the gap width Wg. In this embodiment, the diameter of each of the second holes 32 is approximately 50 mm.

[0022] As shown in FIG. 2, the first filler 41 is filled in each of the two pairs of second holes 32. In this embodiment, the water stop structure 19 has four first fillers 41. Each of the first fillers 41 is filled in a different second hole 32. As shown in FIG. 3, each of the first fillers 41 is in contact with the outer wall 11a of the building 11 and the outer wall 12a of the building 12. As shown in FIG. 2, in this embodiment, the first filler 41 is composed of a storage section 41a and a storage material 41b stored inside the storage section 41a. The storage section 41a is bag-shaped extending in the vertical direction. In this embodiment, the storage section 41a is made of resin. The storage section 41a has flexibility. In this embodiment, the storage material 41b is mortar. The material constituting the storage material 41b is not limited to this embodiment, and the storage material 41b may be composed of other materials such as polyurethane foam.

[0023] The second filler 42 is filled in each of the pair of first holes 31. In this embodiment, the water-stopping structure 19 has two second fillers 42. Each second filler 42 is filled in a different first hole 31. In this embodiment, the second filler 42 is mortar. The material constituting the second filler 42 is not limited to this embodiment, and may be, for example, cement bentonite or a rubber material such as polybutadiene. The second filler 42 has water-stopping properties. As shown in FIG. 3, each second filler 42 is bonded to the exterior wall drilled surface 11d of the building 11, the exterior wall drilled surface 12d of the building 12, and the sealing material 20. As a result, the second filler 42 is used to stop water from entering the gap G from one side (+D2 side) of the second direction D2 of each second filler 42 and the other side (-D2 side) of the second direction D2.

[0024] Therefore, according to the water stop structure 19 of the present embodiment, the pair of second fillers 42 can prevent groundwater from flowing from the outside of each second filler 42 in the second direction D2 to the inside of each second filler 42 in the second direction D2. This can prevent groundwater from flowing around the piping 15. Therefore, it is possible to suitably prevent groundwater from flowing into the interior of the buildings 11, 12 through the gap between the piping 15 and the openings 11b, 12b.

[0025] FIG. 4 is a flow chart showing the water-stopping construction method between buildings of this embodiment. FIG. 5 is a schematic cross-sectional view showing the first hole-drilling step S01 and the second hole-drilling step S02 of this embodiment. FIG. 6 is a schematic cross-sectional view showing the first filling step S03 of this embodiment. FIG. 7 is a first schematic cross-sectional view showing the second filling step S04 of this embodiment. FIG. 8 is a second schematic cross-sectional view showing the second filling step S04 of this embodiment. The water-stopping construction method between buildings of this embodiment is a construction method for manufacturing a water-stopping structure 19 that stops water in the underground portion of the gap G between a pair of buildings 11, 12. As shown in Fig. 4, the water-stop construction method between buildings of this embodiment includes a first drilling step S01 for forming a pair of first holes 31, a second drilling step S02 for forming two pairs of second holes 32, a first filling step S03 for filling each of the two pairs of second holes 32 with a first filler 41, and a second filling step S04 for filling each of the pair of first holes 31 with a second filler 42 having water-stopping properties. In the following description, "workers, etc." includes workers and assembly devices that perform the work of each process. The work of each process may be performed only by workers, only by assembly devices, or by workers and assembly devices.

[0026] In the first drilling step S01, a pair of first holes 31 are formed. More specifically, as shown in FIG. 3, in the first drilling step S01, the pair of first holes 31 are formed by drilling the sealing material 20 arranged in the gap G on both sides in the second direction D2 of the piping 15 downward. In addition, in the first drilling step S01, the outer parts of the outer walls 11a, 12a of the pair of buildings 11, 12 are drilled to form the outer wall drilling surface 11d and the outer wall drilling surface 12d constituting a part of the first hole portion 31 as described above. In addition, in the first drilling step S01, the pair of first holes 31 may be formed by drilling only the sealing material 20 downward as described above. In this case, the outer wall drilling surface 11d and the outer wall drilling surface 12d are not formed, and the diameter of the first hole portion 31 is approximately the same dimension as the gap width Wg.

[0027] As shown in FIG. 5, in the first hole-drilling step S01, a pair of first hole portions 31 are formed by a hole-drilling device 70. The hole-drilling device 70 has a drive unit, a rod 60, and a hole-drilling member 50, which are not shown. The drive unit is a drive unit that rotates and drives the rod 60 and the hole-drilling member 50 about a rotation axis J. In this embodiment, the rotation axis J is a virtual axis extending in the vertical direction. The drive unit also moves the rod 60 and the hole-drilling member 50 in the vertical direction. The rod 60 is connected to the drive unit. The rod 60 is substantially cylindrical and extends in the vertical direction about the rotation axis J. The rod 60 is rotatable about the rotation axis J.

[0028] The hole-drilling member 50 is generally cylindrical and extends vertically around the rotation axis J. A rod 60 is connected to the upper end of the hole-drilling member 50. The hole-drilling member 50 is rotatable together with the rod 60 around the rotation axis J. In this embodiment, the hole-drilling member 50 drills holes in the sealing material 20 and the outer walls 11a, 12a. The hole-drilling member 50 has a plurality of hole-drilling portions 51. Each hole-drilling portion 51 is cylindrical and centered around the rotation axis J. Each hole-drilling portion 51 is arranged in a line along the rotation axis J. Each hole-drilling portion 51 is connected to one another vertically. In this embodiment, the plurality of hole-drilling portions 51 include a first hole-drilling portion 52 and a second hole-drilling portion 53.

[0029] The first hole drilling portion 52 is disposed below the second hole drilling portion 53. The first hole drilling portion 52 is the hole drilling portion 51 disposed at the lowermost position in the vertical direction among the plurality of hole drilling portions 51. The outer diameter OD1 of the first hole drilling portion 52 is equal to or less than the gap width Wg, that is, the dimension of the gap G in the first direction D1. In this embodiment, the outer diameter OD1 of the first hole drilling portion 52 is, for example, 46 mm. The tooth portion 52a is provided on the surface facing downward of the first hole drilling portion 52. The worker, etc., moves the hole drilling member 50 downward while rotating the hole drilling member 50 about the rotation axis J by a drive unit (not shown). As a result, the tooth portion 52a drills the sealing material 20, and a circular hole is formed in the sealing material 20.

[0030] In addition, as described above, since the outer diameter OD1 of the first hole-drilling portion 52 is equal to or smaller than the gap width Wg, when the worker or the like moves the first hole-drilling portion 52 downward, if the moving direction of the hole-drilling member 50 and the extending direction of the gap G deviate from each other as viewed from the second direction D2, the outer peripheral surface of the first hole-drilling portion 52 comes into contact with the outer surface 11c of the outer wall 11a or the outer surface 12c of the outer wall 12a. As a result, even if the moving direction of the hole-drilling member 50 and the extending direction of the gap G deviate from each other as viewed from the second direction D2, the first hole-drilling portion 52 can move downward along the outer wall 11a or the outer wall 12a. As a result, the hole-drilling member 50 can move downward along the gap G. Therefore, although not shown, the worker or the like can move the hole-drilling member 50 downward along the gap G even if the gap G extends in a direction inclined from the vertical direction as viewed from the second direction D2.

[0031] The second hole drilling section 53 is disposed above the first hole drilling section 52. The upper end of the second hole drilling section 53 is connected to the rod 60. The lower end of the second hole drilling section 53 is connected to the first hole drilling section 52. The outer diameter OD2 of the second hole drilling section 53 is larger than the gap width Wg. In this embodiment, the outer diameter OD2 of the second hole drilling section 53 is, for example, 100 mm. That is, the outer diameter OD2 of the second hole drilling section 53, which is the hole drilling section 51 other than the first hole drilling section 52 among the multiple hole drilling sections 51, is larger than the gap width Wg, that is, the dimension of the gap G in the first direction D1. The outer diameter OD2 of the second hole drilling section 53 is larger than the outer diameter OD1 of the first hole drilling section 52. Also, as described above, in this embodiment, the multiple hole drilling sections 51 include the first hole drilling section 52 and the second hole drilling section 53, and the second hole drilling section 53 is disposed above the first hole drilling section 52. Therefore, the outer diameter of the plurality of hole-drilling parts 51 is larger than the outer diameter of the hole-drilling part 51 arranged vertically downward. The second hole-drilling part 53 has a tooth part 53a on the surface facing downward. The worker rotates the hole-drilling part 50 about the rotation axis J by a drive part (not shown) and moves the hole-drilling part 50 downward. As a result, the tooth part 53a drills holes in the sealing material 20 and the outer parts of the outer walls 11a and 12a, forming the first hole part 31 and forming the outer wall drilling surfaces 11d and 12d. As shown in FIG. 2 and FIG. 3, when a pair of first hole parts 31 whose lower ends are located below the pipe 15 are formed on both sides of the second direction D2 of the pipe 15, the first hole-drilling step S01 is completed.

[0032] In the second drilling step S02, two pairs of second hole portions 32 are formed by the drilling device 70. Although not shown, in the second drilling step S02, the outer diameter OD2 of the second drilling portion 53 of the drilling member 50 is, for example, 50 mm. The outer diameter OD2 of the second drilling portion 53 is the same dimension as the gap width Wg. Other configurations, etc. of the drilling device 70 in the second drilling step S02 are similar to the other configurations, etc. of the drilling device 70 in the first drilling step S01 described above.

[0033] As described above, since the outer diameter OD1 of the first hole-drilling portion 52 is equal to or smaller than the gap width Wg, even if the movement direction of the hole-drilling member 50 and the extension direction of the gap G are misaligned when viewed from the second direction D2, the hole-drilling member 50 can be moved downward along the gap G. Therefore, in the second hole-drilling step S02, even if the gap G extends in a direction tilted from the vertical direction when viewed from the second direction D2, the worker or the like can move the hole-drilling member 50 downward along the gap G.

[0034] As described above, in the second drilling step S02, the outer diameter OD2 of the second drilling portion 53 is, for example, 50 mm. Therefore, the outer diameter OD2 of the second drilling portion 53 is larger than the outer diameter OD1 of the first drilling portion 52. Also, as described above, in this embodiment, the multiple drilling portions 51 include the first drilling portion 52 and the second drilling portion 53, and the second drilling portion 53 is disposed above the first drilling portion 52. Therefore, the outer diameter of the multiple drilling portions 51 is larger than the outer diameter of the drilling portion 51 disposed below in the vertical direction. As described above, the outer diameter OD2 of the second drilling portion 53 is the same dimension as the gap width Wg. Therefore, when an operator or the like rotates the drilling member 50 around the rotation axis J by a drive unit (not shown) and moves the drilling member 50 downward, the tooth portion 53a drills the sealing material 20 to form the second hole portion 32. As shown in FIG. 2, when two pairs of second holes 32 whose lower ends are located below the pipe 15 are formed on both sides of each pair of first holes 31 in the second direction D2, the second hole drilling step S02 is completed. At this time, in this embodiment, the outer walls 11a, 12a are exposed to each second hole 32. The outer walls 11a, 12a do not have to be exposed to each second hole 32. The outer diameter OD2 of the second hole drilling portion 53 may be slightly larger than the gap width Wg. This ensures that the outer walls 11a, 12a are exposed to each second hole 32. The second hole drilling step S02 may be performed before the first hole drilling step S01. The second hole drilling step S02 may be performed simultaneously with the first hole drilling step S01.

[0035] In the first filling step S03, the first filler 41 is filled into each of the two pairs of second holes 32. As shown in FIG. 6, in the first filling step S03 of this embodiment, the worker or the like fills each of the two pairs of second holes 32 with the first filler 41 by inserting each of the first filler 41 into the different second holes 32 from above. As described above, in this embodiment, each of the first filler 41 is composed of the storage section 41a and the contained material 41b contained inside the storage section 41a. As described above, in this embodiment, the contained material 41b is mortar. When the first filler 41 is inserted into the second hole section 32, the contained material 41b is in a state before hardening and has fluidity. As shown in FIG. 7, the worker or the like fills each of the second holes 32 with the first filler 41, and then hardens the contained material 41b, and the first filling step S03 ends. At this time, each of the first filling materials 41 is in contact with the outer walls 11a, 12a as shown in Fig. 8. Each of the first filling materials 41 may be in contact with the outer walls 11a, 12a via the sealing material 20.

[0036] In the second filling step S04, the second filler 42 is filled into each of the pair of first holes 31. As shown in FIG. 7, in the second filling step S04 of this embodiment, the worker pours the second filler 42 into each of the first holes 31 using the filling device 80. As described above, in this embodiment, the second filler 42 is mortar. When filling the first holes 31 with the second filler 42, the second filler 42 is in a state before hardening and has fluidity. Therefore, as shown in FIG. 8, the second filler 42 that has flowed into the first holes 31 may leak out of the first holes 31 in the second direction D2 through the gap between the outer walls 11a, 12a and the sealing material 20. However, as described above, since the first filler 41 is disposed on both sides of the first hole 31 in the second direction D2, each of the first fillers 41 can block the second filler 42 leaking from the first hole 31 in the second direction D2. As shown in FIG. 2, the worker fills each of the first holes 31 with the second filler 42, and then hardens the second filler 42, completing the second filling step S04. At this time, as shown in FIG. 3, each of the second fillers 42 is in contact with the outer wall drilled hole surfaces 11d, 12d. When the second filling step S04 is completed, the manufacture of the water-stopping structure 19 is completed. The second filling step S04 may be performed before the first filling step S03. It takes a certain amount of time for the second filler 42 to leak from the first hole 31 in the second direction D2 through the gap between the outer walls 11a, 12a and the sealing material 20. Therefore, even when the first filling step S03 is performed after the second filling step S04, the second filling material 42 leaking out in the second direction D2 from the first hole portion 31 can be blocked by each first filling material 41. Moreover, the second filling step S04 may be performed simultaneously with the first filling step S03.

[0037] According to this embodiment, the water-stopping construction method between buildings includes a first drilling step S01 of drilling holes vertically downward in the sealing material 20 arranged in the gap G on both sides of the pipe 15 to form a pair of first holes 31 whose lower ends are located below the pipe 15, a second drilling step S02 of drilling holes downward in the sealing material 20 to form two pairs of second holes 32 whose lower ends are located below the pipe 15, a first filling step S03 of filling each of the two pairs of second holes 32 with a first filler 41, and a second filling step S04 of filling each of the pair of first holes 31 with a second filler 42 having water-stopping properties, and each of the pair of first holes 31 is formed in a position sandwiched between a pair of different second holes 32. Therefore, in the first filling step S03, after filling each second hole 32 with the first filling material 41, in the second filling step S04, the second filling material 42 can be filled into each first hole 31. As a result, even if the second filling material 42 having fluidity that has flowed into each first hole 31 leaks out from the first hole 31 in the second direction D2 through between the sealing material 20 and the outer walls 11a, 12a as described above, the first filling material 41 can dam the second filling material 42. Therefore, since the second filling material 42 can be filled into each first hole 31 without any gaps, it is possible to suppress groundwater from flowing from the outside of each second filling material 42 in the second direction D2 to the inside of each second filling material 42 in the second direction D2. This makes it possible to suppress groundwater from flowing around the pipe 15. Therefore, it is possible to suppress groundwater from flowing into the inside of the buildings 11, 12 through the gaps between the pipe 15 and the openings 11b, 12b.

[0038] In addition, in this embodiment, as described above, since each of the first fillers 41 is in contact with the outer walls 11a, 12a, each of the first fillers 41 can more suitably stop the second filler 42 leaking out from the first hole portion 31 in the second direction D2. This allows the second filler 42 to be filled into each of the first holes 31 more tightly, so that it is possible to more suitably prevent groundwater from flowing from the outside of each of the second fillers 42 in the second direction D2 to the inside of each of the second fillers 42 in the second direction D2. This makes it possible to more suitably prevent groundwater from flowing around the piping 15. Therefore, it is possible to more suitably prevent groundwater from flowing into the inside of the buildings 11, 12 through the gap between the piping 15 and the openings 11b, 12b.

[0039] According to this embodiment, in the first drilling step S01, the outer parts of the exterior walls 11a, 12a of the pair of buildings 11, 12 are drilled. As a result, as described above, a part of each second hole portion 32 can be formed by the exterior wall drilling surface 11d, 12d. Since the exterior wall drilling surface 11d, 12d is formed by the first drilling step S01, the amount of dust, etc. adhering to the exterior wall drilling surface 11d, 12d is less than the amount of dust, etc. adhering to the outer surface 11c, 12c. Therefore, the adhesive strength between each second filler 42 and the exterior wall drilling surface 11d, 12d is greater than the adhesive strength between each second filler 42 and the outer surface 11c, 12c. As a result, in this embodiment, the adhesive strength between each second filler 42 and the exterior wall 11a, 12a can be increased compared to the case where the exterior wall drilling surface 11d, 12d is not formed in the first drilling step S01. Therefore, groundwater can be more effectively prevented from flowing from the outside of the second direction D2 of each second filling material 42 to the inside of the second direction D2 of each second filling material 42, thereby more effectively preventing groundwater from flowing into the interior of the buildings 11, 12 through the gap between the piping 15 and the openings 11b, 12b.

[0040] According to this embodiment, in the first drilling step S01 and the second drilling step S02, the sealing material 20 is drilled by the drilling member 50 rotating about the rotation axis J extending in the vertical direction, the drilling member 50 has a plurality of cylindrical drilling parts 51 centered on the rotation axis J, the plurality of drilling parts 51 are arranged in a line along the rotation axis J, the outer diameter of each of the plurality of drilling parts 51 is larger than the outer diameter of the drilling part 51 arranged on the lower side in the vertical direction, and the outer diameter OD1 of the first drilling part 52 arranged on the lowermost side of the plurality of drilling parts 51 is equal to or smaller than the gap width Wg, that is, the dimension of the gap G in the first direction D1. Therefore, as described above, in each of the first drilling step S01 and the second drilling step S02, even if the gap G extends in a direction inclined from the vertical direction as viewed from the second direction D2, the drilling member 50 can be moved downward along the gap G. This allows each of the first holes 31 and each of the second holes 32 to be formed along the gap G. Therefore, in the second hole drilling step S02, the outer walls 11a, 12a are easily exposed to each of the second holes 32, so that each of the first fillers 41 and the outer walls 11a, 12a are easily brought into contact with each other. Therefore, in the second filling step S04, the second filler 42 leaking out from each of the first holes 31 in the second direction D2 can be more suitably blocked by each of the first fillers 41, so that each of the first holes 31 can be easily filled with the second filler 42 without gaps. Also, in the first hole drilling step S01, the outer wall drilling surfaces 11d, 12d are easily formed, so that the adhesive strength between each of the second fillers 42 and the outer walls 11a, 12a is easily increased. This makes it possible to more effectively prevent groundwater from flowing from the outside of each second filling material 42 in the second direction D2 to the inside of each second filling material 42 in the second direction D2. Therefore, it is possible to more effectively prevent groundwater from flowing into the buildings 11, 12 through the gaps between the piping 15 and the openings 11b, 12b.

[0041] In the first drilling step S01, the outer diameter OD2 of the second drilling section 53, which is at least one of the drilling sections 51 other than the first drilling section 52 among the multiple drilling sections 51, is larger than the gap width Wg, that is, the dimension in the first direction D1 of the gap G. When the outer diameter OD2 of the second drilling section 53 is equal to or smaller than the gap width Wg, both the outer wall drilling surface 11d and the outer wall drilling surface 12d cannot be formed in one drilling operation. Therefore, when the outer diameter OD2 of the second drilling section 53 is equal to or smaller than the gap width Wg, it is necessary to form both the outer wall drilling surface 11d and the outer wall drilling surface 12d by performing the drilling operation multiple times. In contrast, according to this embodiment, as described above, since the outer diameter OD2 of the second drilling section 53 is larger than the gap width Wg, both the outer wall drilling surface 11d and the outer wall drilling surface 12d can be formed in one drilling operation. Therefore, it is possible to suppress an increase in the number of work steps in the first drilling step S01.

[0042] <Second embodiment> 9 is a schematic cross-sectional view showing the first hole-drilling step S01 and the second hole-drilling step S02 of this embodiment. In this embodiment, the hole-drilling member 250 of the hole-drilling device 270 has a plurality of hole-drilling sections 251. In this embodiment, the plurality of hole-drilling sections 251 include a first hole-drilling section 52, a second hole-drilling section 253, a third hole-drilling section 254, and a fourth hole-drilling section 255. In the following description, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof will be omitted.

[0043] The first hole drilling portion 52 is disposed below the second hole drilling portion 253. The configuration of the first hole drilling portion 52 of this embodiment is the same as the configuration of the first hole drilling portion 52 of the first embodiment described above. The second hole drilling portion 253 is disposed above the first hole drilling portion 52. The lower end of the second hole drilling portion 253 is connected to the first hole drilling portion 52. The outer diameter OD2 of the second hole drilling portion 253 is larger than the outer diameter OD1 of the first hole drilling portion 52. The outer diameter OD2 of the second hole drilling portion 253 is larger than the gap width Wg. In this embodiment, the outer diameter OD2 of the second hole drilling portion 253 is, for example, 66 mm. A tooth portion 253a is provided on the surface of the second hole drilling portion 253 facing downward. The third hole drilling portion 254 is disposed above the second hole drilling portion 253. The lower end of the third hole drilling portion 254 is connected to the second hole drilling portion 253. The outer diameter OD3 of the third drilling portion 254 is larger than the outer diameter OD3 of the second drilling portion 253. The outer diameter OD3 of the third drilling portion 254 is larger than the gap width Wg. In this embodiment, the outer diameter OD3 of the third drilling portion 254 is, for example, 86 mm. The surface facing the lower side of the third drilling portion 254 is provided with teeth 254a. The fourth drilling portion 255 is disposed above the third drilling portion 254. The lower end of the fourth drilling portion 255 is connected to the third drilling portion 254. The outer diameter OD4 of the fourth drilling portion 255 is larger than the outer diameter OD3 of the third drilling portion 254. The outer diameter OD4 of the fourth drilling portion 255 is larger than the gap width Wg. In this embodiment, the outer diameter OD4 of the fourth drilling portion 255 is, for example, 100 mm. The surface facing the lower side of the fourth drilling portion 255 is provided with teeth 255a.

[0044] In this embodiment, the outer diameter OD2 of the second drilling portion 253, the outer diameter OD3 of the third drilling portion 254, and the outer diameter OD4 of the fourth drilling portion 255, which are the drilling portions 251 other than the first drilling portion 52 among the multiple drilling portions 251, are each larger than the gap width Wg, i.e., the dimension in the first direction D1 of the gap G. That is, the outer diameter of at least one of the drilling portions 51 other than the first drilling portion 52 among the multiple drilling portions 251 is larger than the gap width Wg. Also, as described above, the outer diameter OD2 of the second drilling portion 253 is larger than the outer diameter OD1 of the first drilling portion 52, the outer diameter OD3 of the third drilling portion 254 is larger than the outer diameter OD2 of the second drilling portion 253, and the outer diameter OD4 of the fourth drilling portion 255 is larger than the outer diameter OD3 of the third drilling portion 254. Therefore, the outer diameter of each of the multiple hole-drilling portions 251 is larger than the outer diameter of the hole-drilling portion 251 disposed vertically below it.

[0045] In this embodiment, in the first drilling step S01, the worker or the like rotates the drilling member 250 about the rotation axis J by a drive unit (not shown) while moving the drilling member 250 downward. As a result, the teeth 253a, 254a, 255a drill holes in the sealing material 20 and the outer parts of the outer walls 11a, 12a to form the first hole portion 31 and the outer wall drilling surfaces 11d, 12d. The second drilling step S02, the first filling step S03, and the second filling step S04 of this embodiment are similar to the second drilling step S02, the first filling step S03, and the second filling step S04 of the first embodiment described above.

[0046] According to this embodiment, when the gap width Wg of a part of the gap G is larger than the outer diameter OD2 of the second hole-drilling portion 253, the outer peripheral surface of the second hole-drilling portion 253 contacts the outer surface 11c of the outer wall 11a or the outer surface 12c of the outer wall 12a. As a result, the second hole-drilling portion 253, which has a larger outer diameter than the first hole-drilling portion 52, can move downward along the outer wall 11a or the outer wall 12a. Therefore, compared with the case where the hole-drilling member 250 does not have the second hole-drilling portion 253, that is, the case where the first hole-drilling portion 52 moves downward along the outer wall 11a or the outer wall 12a, the hole-drilling member 250 can be moved downward along the gap G with greater accuracy. As a result, each first hole portion 31 can be formed along the gap G with greater accuracy, so that the outer wall hole-drilling surfaces 11d, 12d can be formed more stably in the first hole-drilling step S01. Therefore, the adhesive strength between each second filler 42 and the exterior walls 11a, 12a can be more stably increased, and it is possible to more suitably prevent groundwater from flowing from the outside of each second filler 42 in the second direction D2 to the inside of each second filler 42 in the second direction D2. Therefore, it is possible to more suitably prevent groundwater from flowing into the interior of the buildings 11, 12 through the gap between the piping 15 and the openings 11b, 12b.

[0047] In addition, in this embodiment, in the first hole drilling step S01, the outer diameter of each of the second hole drilling portion 253, the third hole drilling portion 254, and the fourth hole drilling portion 255, which is at least one of the multiple hole drilling portions 251 other than the first hole drilling portion 52, is larger than the gap width Wg, that is, the dimension of the gap G in the first direction D1. Therefore, as in the first embodiment described above, both the outer wall drilling surface 11d and the outer wall drilling surface 12d can be easily formed by one drilling operation. Therefore, it is possible to suppress an increase in the number of work steps in the first hole drilling step S01.

[0048] Although an embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. [Explanation of symbols]

[0049] Reference Signs List 11, 12...Building, 15...Pipe, 20...Sealing material, 31...First hole portion, 32...Second hole portion, 41...First filling material, 42...Second filling material, 50, 250...Drilling member, 51...Drilling portion, 52...First drilling portion, G...Gap, J...Rotation axis, S01...First drilling step, S02...Second drilling step, S03...First filling step, S04...Second filling step

Claims

1. A watertight construction method between buildings, which includes a pipe disposed underground and a gap between a pair of buildings arranged side by side in a first direction, and which stops water in an underground portion of the gap between the buildings, a first hole making step of drilling holes in the sealing material disposed in the gap on both sides of the pipe toward a vertically downward direction to form a pair of first hole portions whose vertically lower ends are positioned vertically lower than the pipe; a second drilling step of drilling holes in the sealing material in a vertically downward direction to form two pairs of second holes whose vertically lower ends are located vertically lower than the pipes; a first filling step of filling each of the two pairs of second holes with a first filler; a second filling step of filling each of the pair of first holes with a second filler having a water-stopping property; having A waterproofing method between buildings, wherein each of a pair of the first hole portions is formed at a position sandwiched between a mutually different pair of the second hole portions.

2. 2. The waterproof construction method between buildings according to claim 1, wherein in the first drilling step, holes are drilled in outer portions of the exterior walls of each of the pair of buildings.

3. In the first hole drilling step and the second hole drilling step, holes are drilled in the sealing material by a drilling member that rotates about a rotation axis that extends in a vertical direction, The hole-drilling member has a plurality of cylindrical hole-drilling portions centered on the rotation axis, The plurality of drilling portions are arranged side by side along the rotation axis, The outer diameter of each of the plurality of hole-drilling portions is larger than the outer diameter of the hole-drilling portion disposed vertically below, 3. A water-stopping construction method between buildings as described in claim 1 or 2, wherein the outer diameter of a first drilling section which is located vertically lower among the plurality of drilling sections is equal to or smaller than the dimension of the gap in the first direction.

4. The water-stopping construction method between buildings described in claim 3, wherein in the first drilling process, the outer diameter of at least one of the plurality of drilling sections other than the first drilling section is larger than the dimension of the gap in the first direction.

Images