JP2019015148A - Water stop structure - Google Patents

Abstract

To provide a water stop structure which is rarely broken even when applied between structures on which a large relative displacement may occur.SOLUTION: The water stop structure comprises: a lower structure 12; a seismic isolator disposed on the lower structure 12; an upper structure 16 supported by the seismic isolator; and a water stop member 30 which includes a water stop board 32 disposed between the lower structure 12 and the upper structure 16 and connected to be rotatable with respect to upper structure 16, and a seal member 34 which is fixed to the lower end of the water stop board 32 and slidable together with the lower structure 12.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a water stop structure.

  The following Patent Document 1 shows a configuration of an expansion joint that is installed between two building structures adjacent to each other with a gap therebetween. In this expansion joint, the end of a water stop plate curved in a U-shape is fixed to each of two building housings.

JP 2002-188216 A

  The water stop plate in the expansion joint of Patent Document 1 can follow the relative displacement of the two building frames by being deformed during an earthquake. However, there is a limit to the displacement that can be followed, and if a large relative displacement occurs, the water stop plate may be damaged.

  In view of the above facts, an object of the present invention is to provide a waterproof structure that is not easily damaged even when applied between structures in which a large relative displacement occurs.

  The water stop structure of claim 1 includes a lower structure, a seismic isolation device installed in the lower structure, an upper structure supported by the seismic isolation device, the lower structure, and the upper structure. A water stop plate having an upper end rotatably connected to the upper structure, a seal member fixed to the lower end of the water stop plate and slidable with the lower structure, And a water stop member provided with.

  According to the water stop structure of claim 1, the upper structure is supported by the seismic isolation device installed in the lower structure. For this reason, at the time of an earthquake, a lower structure and an upper structure are displaced relatively.

  In the water stop member provided between the lower structure and the upper structure, the upper end portion of the water stop plate is rotatably connected to the upper structure. For this reason, even if the lower structure and the upper structure are relatively displaced in the vertical direction, the water stop plate rotates so that the displacement of the lower structure and the upper structure can be followed. For this reason, a water stop member cannot be damaged easily and can maintain water stop.

  A seal member is slidably fixed to the lower structure at the lower end of the water stop member. For this reason, even if the lower structure and the upper structure are relatively displaced in the lateral direction, the water stop member can follow the displacement by moving in the lateral direction together with the upper structure. For this reason, a water stop member cannot be damaged easily and can maintain water stop.

  Thus, even if it applies between the structures which a big relative displacement produces, the water stop structure of Claim 1 is hard to damage.

  The water stop structure according to claim 2, wherein a lower end is fixed to the lower structure and an upper end is in contact with the upper structure, and an inner space is formed between the water stop member and the water stop member. An airtight member is provided, and the seal member is provided with a notch communicating the outer space of the water stop member and the inner space.

  According to the water stop structure of claim 2, the inner space is formed between the upper structure and the lower structure by the airtight member and the water stop member. Moreover, since the notch is provided in the sealing member of the water stop member, the inner space becomes an isobaric space having a substantially constant pressure with the atmospheric pressure of the outer space. For this reason, the inner space is less likely to be negative pressure and rain is less likely to blow.

  Furthermore, since the space on the indoor side of the airtight member is airtight by the airtight member, the blowing of wind and rain into the indoor space is suppressed, and the sound generated indoors is difficult to leak to the outdoors.

  The water stop structure according to claim 3, wherein the seal member includes a pedestal portion fixed to a lower end portion of the water stop plate, an outer seal member fixed to an outer surface of the lower surface of the pedestal portion, and an inner surface of the lower surface of the pedestal portion The notch is formed in each of the outer seal material and the inner seal material, and is arranged so as to be shifted with respect to the rainwater intrusion direction.

  In the water stop structure of claim 3, the sealing member has a double structure of the outer sealing material and the inner sealing material. For this reason, even if rain blows from the outer seal material notch to the inside of the outer seal material during storms, the inner seal material provided inside the notch prevents rain splashes from entering the inner space. it can.

  The water stop structure according to the present invention is not easily damaged even when applied between structures where a large relative displacement occurs.

It is a fragmentary sectional view which shows the building to which the water stop structure which concerns on embodiment of this invention was applied. It is an elevation sectional view showing the water stop structure concerning the embodiment of the present invention. It is a perspective view which shows the edge part structure of the water stop member in the water stop structure which concerns on embodiment of this invention. FIG. 4 is a sectional view taken along line 4-4 in FIG. It is an elevation sectional view showing the modification which omitted the splash barrier of the water stop member in the water stop structure concerning the embodiment of the present invention.

[First Embodiment]
(Water stop structure)
As shown in FIG. 1, the water stop structure according to the first embodiment includes a lower structure 12, a seismic isolation device 14 installed in the lower structure 12, and an upper structure 16 supported by the seismic isolation device 14. In the outer peripheral part of the building 10 equipped with these, it is the isobaric water stop structure provided between the lower structure 12 and the upper structure 16.

(Substructure)
The lower structure 12 is a building body in the building 10. On the outer peripheral portion of the lower structure 12, a rising portion 12B is erected from the support surface 12A on which the seismic isolation device 14 is installed, and a headboard portion 12C is formed on the top of the rising portion 12B. The headboard portion 12C is provided with a water gradient (gradient at an angle θ1 with respect to the horizontal plane) inclined downward from the indoor side (arrow IN side in FIG. 1) to the outdoor side (arrow OUT side in FIG. 1) of the building 10. The surface is finished with an aluminum panel.

(Superstructure)
The upper structure 16 is a large roof in the building 10. A drooping wall portion 16 </ b> B projecting downward from the roof main body 16 </ b> A is formed on the outer peripheral portion of the upper structure 16 at a position facing the headboard portion 12 </ b> C of the lower structure 12. The drooping wall portion 16B is spaced apart from the headboard portion 12C, and a water stop member 30 and an airtight member 40 described later are installed between the drooping wall portion 16B and the headboard portion 12C. The water stop member 30 and the airtight member 40 do not support the load of the upper structure 16.

(bearing)
As shown in FIG. 2, a bearing 20 is fixed to the outdoor side of the hanging wall portion 16 </ b> B, that is, the lower surface along the outer periphery of the upper structure 16. As will be described in detail later, a water stop plate 32 is rotatably connected to the bearing 20.

(Water stop member)
As shown in FIG. 2, a water stop member 30 is provided between the headboard portion 12 </ b> C in the lower structure 12 and the hanging wall portion 16 </ b> B in the upper structure 16. The water stop member 30 is rotatably connected to the bearing 20, the water stop plate 32 is rotatably connected to the lower end of the water stop plate 32, and the seal member 34 is slidable with the headboard 12 </ b> C. It has.

  The water stop plate 32 is formed by combining members formed by extrusion of aluminum, and glass wool G is filled in the hollow portion 32V. The glass wool G is also laid on the hanging wall portion 16B, and the sound insulation and heat insulation properties of the building 10 are enhanced.

  As shown in FIG. 3, a recess 32 </ b> U is formed at the upper end portion of the water stop plate 32. Furthermore, a through hole 32UH that opens to the recess 32U is provided along the upper end portion of the water stop plate 32.

  As indicated by an arrow M in FIG. 3, the water stop plate 32 is disposed so that the concave portion 32 </ b> U engages with the bearing 20. The shaft body 22 is inserted into the through hole 20H formed in the bearing 20 and the through hole 32UH formed in the water stop plate 32, whereby the water stop plate 32 is rotatably connected to the bearing 20. .

  In addition, it is preferable to provide the recessed part 32U of the water stop plate 32 at least two places along the extending direction (W direction) of the water stop plate 32. Further, the number of bearings 20 equal to the number of the concave portions 32U is provided.

  Similar to the upper end, the lower end of the water stop plate 32 is provided with a recess 32D and a through hole 32DH opening to the recess 32D. A bearing 35 of a seal member 34 to be described later is engaged with the recess 32D. Further, the shaft body 22 is inserted into the through hole 35 </ b> H formed in the bearing 35 and the through hole 32 </ b> DH of the water stop plate 32. Thereby, the seal member 34 is rotatably connected to the lower end portion of the water stop plate 32.

  The seal member 34 is rotatably connected to the lower end portion of the water stop plate 32 and extends to the outside (arrow OUT side) and the inside (arrow IN side) of the water stop plate 32, and the lower surface outside of the base portion 34A. And a rubber rain barrier 34C fixed to the lower surface of the pedestal portion 34A, and a rubber splash barrier 34C.

  The rain barrier 34B and the splash barrier 34C are installed over substantially the entire length of the pedestal portion 34A except for portions where notches BV and CV described later are formed. In addition, the rain barrier 34B and the splash barrier 34C have a semicircular cross section at a portion protruding from the lower surface of the pedestal portion 34A, and have an area in contact with the headboard 12C of the lower structure 12 as compared to a rectangular shape, for example. Few. For this reason, the friction with respect to the coping part 12C is small, and it is easy to slide on the coping part 12C.

  A bearing 35 is fixed to the upper surface of the pedestal portion 34A. The bearing 35 and the recessed portion 32 </ b> D of the water stop plate 32 are engaged, and the pedestal portion 34 </ b> A is rotatably connected to the lower end portion of the water stop plate 32. Accordingly, the pedestal portion 34A is disposed so as to be substantially parallel to the headboard portion 12C regardless of the angle of the water stop plate 32 with respect to the headboard portion 12C. Thereby, the state where the rain barrier 34B and the splash barrier 34C are in contact with the headboard 12C can be maintained.

(Joint cover)
As shown in FIG. 3, a rubber joint cover is provided at one end in the extending direction (W direction) of the water stop plate 32 and one end in the extending direction (W direction) of the pedestal 34A. 32J and 34J are fixed. Further, the joint covers 32J and 34J are not installed at the other end of the water stop plate 32 and the other end of the pedestal 34A.

  As shown in FIG. 4, the water stop plates 32 adjacent to each other are arranged in a state where the other water stop plate 32 is inserted into the joint cover 32 </ b> J of the one water stop plate 32. Further, the pedestal portions 34A of the seal members 34 adjacent to each other are arranged in a state where the end portion of the joint cover 34J fixed to one pedestal portion 34A is pressed against the other pedestal portion 34A.

(Notch)
As shown in FIG. 3, notches BV and CV are formed in the rain barrier 34B and the splash barrier 34C, respectively. The notch BV communicates the outdoor space OA (the outer space of the water stop member 30) and the water stop space BA sandwiched between the rain barrier 34B and the splash barrier 34C. The notch CV communicates the inner space (buffer space MA described later) of the water stop member 30 with the water stop space BA. Further, the notches BV and CV are provided at different positions in the extending direction (W direction) of the pedestal portion 34A, and are shifted from the rainwater intrusion direction.

(Airtight member)
As shown in FIG. 2, an airtight member 40 is provided between the head portion 12 </ b> C of the lower structure 12 and the hanging wall portion 16 </ b> B of the upper structure 16 and inside the water stop member 30 (indoor side). It has been. The hermetic member 40 has a pedestal portion 42 fixed to the headboard portion 12C of the lower structure 12 and a lower end portion of an elastically deformable foam rubber wind barrier 44 (outer wind barrier 44A, inner wind barrier 44B). It is fixed and formed. The upper end portions of the wind barriers 44A and 44B are arranged in contact with the lower end surface of the hanging wall portion 16B of the upper structure 16 and are not fixed.

  Note that “disposed in contact” means that the wind barriers 44A and 44B are pressed from the drooping wall portion 16B under a normal condition in which the lower structure 12 and the upper structure 16 are relatively moved by a slight vibration or wind load. And a state in which the gap is open between the wind barriers 44A and 44B and the drooping wall portion 16B.

  The inside of the airtight member 40 is an indoor space IA of the building 10, and a buffer space MA is formed outside the airtight member 40, that is, between the water stop member 30 and the airtight member 40.

(Action / Effect)
In the building 10 according to the present embodiment, as shown in FIG. 1, the upper structure 16 is supported by the seismic isolation device 14 installed in the lower structure 12. For this reason, at the time of an earthquake, as shown by a two-dot chain line in FIG. 1, the lower structure 12 and the upper structure 16 are relatively displaced in the lateral direction. Further, at the time of pitching, the lower structure 12 and the upper structure 16 are relatively displaced in the vertical direction.

  In the water stop structure according to the present embodiment, as shown in FIG. 2, the water stop plate 32 of the water stop member 30 is rotatably connected to the bearing 20 fixed to the upper structure 16 and the bearing 35 of the seal member 34. Has been.

  For this reason, even if the lower structure 12 and the upper structure 16 are relatively displaced in the vertical direction, the water stop member 30 rotates with respect to the bearing 20 and the bearing 35, thereby the lower structure 12 and the upper structure 16. It can follow the displacement of. For this reason, the water stop member 30 is hard to be damaged.

  Further, the rain barrier 34 </ b> B and the splash barrier 34 </ b> C in the seal member 34 are slidable with respect to the headboard 12 </ b> C of the lower structure 12. For this reason, even if the lower structure 12 and the upper structure 16 are relatively displaced in the lateral direction, the water stop member 30 can follow the displacement by moving in the lateral direction together with the upper structure 16. For this reason, the water stop member 30 is hard to be damaged. Thus, the water stop member 30 according to the present embodiment is not easily damaged even when applied between structures where a large relative displacement occurs.

  Further, since the window barrier 44 in the airtight member 40 is made of foamed rubber, when the lower structure 12 and the upper structure 16 are relatively displaced in the vertical direction (direction approaching), they are elastically deformed and hardly damaged. Further, even if the lower structure 12 and the upper structure 16 are relatively displaced in the vertical direction (separating direction) or the lateral direction, the upper end portion of the wind barrier 44 is not fixed to the upper structure 16 and thus is not pulled. Hard to damage. Thus, the airtight member 40 according to the present embodiment is not easily damaged even when applied between structures where a large relative displacement occurs.

  The water stoppage of the waterstop structure according to the present embodiment is ensured as follows. First, the water stop plate 32 of the water stop member 30 suppresses the blowing of rainwater from the outdoor space OA to the buffer space MA. As shown in FIG. 3, since the ends of the water blocking plates 32 adjacent to each other are connected by a joint cover 32J, rainwater hardly enters from this connecting portion.

  Further, a sealing member 34 is connected to the lower end portion of the water stop plate 32. The seal member 34 is provided with a pedestal portion 34A extending outward and inward of the water blocking plate 32, and a rain barrier 34B is provided outside the lower surface of the pedestal portion 34A. The rain barrier 34B prevents rainwater from being blown into the buffer space MA.

  The rain barrier 34B is provided with a notch BV. When rain splash enters from the notch BV into the still water space BA, the rain splash is buffered by the splash barrier 34C provided inside the lower surface of the pedestal portion 34A, as indicated by a one-dot chain line WT in FIG. Intrusion into MA is suppressed. Since the notch CV of the splash barrier 34C is provided at a position different from the notch BV in the extending direction (W direction) of the pedestal portion 34A, the rain splash that has entered the water stop space BA from the notch BV It is difficult to enter the buffer space MA through the missing CV.

  The buffer space MA is a space formed between the water stop member 30 and the airtight member 40, and is communicated with the outdoor space OA by notches BV and CV as shown by a one-dot chain line AR in FIG. . For this reason, the pressure in the buffer space MA is almost equal to the atmospheric pressure, and is unlikely to become a negative pressure (so-called isobaric space). For this reason, it is difficult for rain to blow into the buffer space MA.

  Further, as shown in FIG. 2, since the indoor space IA is airtight by the airtight member 40, blowing of wind and rain into the indoor space IA is suppressed. Further, since the wind barrier 44 of the hermetic member 40 is doubled (wind barriers 44A and 44B), the hermeticity is high. Further, the wind barrier 44 is made of foamed rubber, so that sounds generated indoors are difficult to leak to the outdoors.

[Second Embodiment]
In the water stop member 30 according to the first embodiment, the seal member 34 (rain barrier 34B and splash barrier 34C) is fixed to the lower end portion of the water stop plate 32 via a pedestal portion 34A, but the second embodiment. In the water stop member 50 according to the above, a rubber rain barrier 54 as a seal member is directly fixed to the water stop plate 52. The rain barrier 54 is provided with a notch (not shown) that communicates the outdoor space OA and the buffer space MA.

  The water stop plate 52 has a lower end curved toward the outdoor side, an outdoor side surface at the lower end is a concave curved surface, and an indoor side surface is a convex curved surface. The rain barrier 54 is fixed to the convex curved surface portion and is in contact with the headboard 12C.

  Further, the upper end portion of the water stop plate 52 is disposed with a gap having a width H between the upper wall 16B and the hanging wall portion 16B of the upper structure 16, and the adjustment projecting upward from the upper end portion of the water stop plate 52 into this gap. A plate 56 is arranged. The protruding height of the adjustment plate 56 is formed to be smaller than the width H of the gap, and does not collide with the upper structure 16 even if the water stop plate 52 rotates around the shaft body 22. Further, by adjusting the protruding height, the pressure of the buffer space MA is adjusted so as not to be negative with respect to the atmospheric pressure.

  In addition, the protrusion height of the adjustment plate 56 may be increased to an extent that does not hinder the rotation of the water stop plate 52 so as to be substantially the same as the width H, and a cutout may be formed in the adjustment plate 56. Alternatively, the protruding height of the adjustment plate 56 may be made smaller than the width H, and further a notch may be formed. Even in this way, the pressure of the buffer space MA can be adjusted.

  According to the water stop structure according to the second embodiment, the pressure of the buffer space MA can be adjusted by the adjusting plate 56 so that the pressure does not become negative with respect to the atmospheric pressure. For this reason, it can suppress that rain blows into buffer space MA. Thereby, although a splash barrier is not provided, the water stop effect can be acquired. By not providing the splash barrier, the configuration of the water stop member 50 can be simplified as compared with the configuration of the water stop member 30.

  The adjustment plate 56 rotates about the shaft body 22 when the lower structure 12 and the upper structure 16 are relatively displaced during an earthquake. At this time, a gap between the adjustment plate 56 and the upper structure 16 is widened. For this reason, for example, even if the volume of the buffer space MA suddenly increases, the buffer space MA is unlikely to become negative pressure.

  In the water stop structure of the second embodiment, as in the first embodiment, the adjustment plate 56 is provided by reducing the width H of the gap between the upper end portion of the water stop plate 52 and the upper structure 16. It can also be configured without. In this case, since the amount of air passing through the gap between the outdoor space OA and the buffer space MA decreases, it is difficult to adjust the pressure in the buffer space MA. However, for example, when the volume of the buffer space MA is sufficiently larger than the volume that is constantly changed by microvibration, the buffer space MA is unlikely to become negative pressure, so rain is hardly blown in the first place.

[Modification]
In the water stop member 30 in the water stop structure according to the first embodiment, the splash barrier 34C is installed over substantially the entire length of the pedestal portion 34A, but the embodiment of the present invention is not limited thereto. In other words, the splash barrier 34C may be any as long as it prevents rain droplets that have entered the water stop space BA from the notch BV of the rain barrier 34B from entering the buffer space MA or is difficult to enter. What is necessary is just to install over the area | region (the range pinched | interposed into the diagonal line which connected the corner | angular part which planarly viewed the notch BV). The same applies to the second embodiment.

  Moreover, in the building 10 to which the water stop structure which concerns on 1st Embodiment is applied, although the surface of the coping part 12C of the lower structure 12 is finished with the aluminum panel, embodiment of this invention is not restricted to this. . For example, you may form with a galvanized steel plate or stainless steel. The same applies to the material forming the pedestal portion 42 of the water blocking member 30 and the airtight member 40. The same applies to the second embodiment.

  In selecting the materials for forming the headboard portion 12C, the bearing 20, the water stop member 30 (water stop member 50), and the airtight member 40, it is preferable to use the same material in order to avoid electrolytic corrosion. Further, it is more preferable that the cap portion 12C is coated with a fluororesin on the surface in order to reduce the frictional force with the rain barrier 34B (rain barrier 54) and the splash barrier 34C.

  Moreover, although the rain barrier 34B (rain barrier 54) and the splash barrier 34C are made of rubber, they may be made of a fluororesin. Thereby, the rain barrier 34B and the splash barrier 34C are easily slipped with respect to the headboard 12C.

  Further, although the headboard portion 12C has a water gradient, the slope angle θ1 can be freely set. For example, the headboard portion 12C may be formed horizontally by setting θ1 = 0 °.

  Moreover, although the glass wool G was filled in the hollow part of the water stop plate 32 of the water stop member 30 in 1st Embodiment, embodiment of this invention is not restricted to this. For example, the water blocking member 30 may be made heavy by fixing a metal lump or the like. By making the water stop member 30 heavy, the rain barrier 34B and the splash barrier 34C are pressed against the headboard portion 12C, so that the water stop member 30 does not move normally. The same applies to the water stop member 50 in the second embodiment.

  Further, in order to press the rain barrier 34B and the splash barrier 34C against the headboard 12C, an urging means such as a leaf spring or a coil spring can be used instead of the metal block. In this case, for example, the end portions of the expanded leaf springs are fixed to the lower surface of the hanging wall portion 16B of the upper structure 16 and the indoor side surface of the water stop plate 32, respectively. Thereby, the rain barrier 34B and the splash barrier 34C are pressed against the headboard 12C by the force of the leaf springs to return to the original shape.

  Further, in the first embodiment, in order to connect the water stop plate 32 and the upper structure 16 and to connect the water stop plate 32 and the seal member 34, the upper and lower ends of the water stop plate 32 are respectively provided with recesses 32U, Although 32D is provided, the embodiment of the present invention is not limited to this. For example, even if the concave portions 32U and 32D are not provided, the water stop plate 32 and the upper structure 16 or the water stop plate 32 and the seal member 34 can be connected using a hinge. Even if a hinge is used, each can be connected rotatably. Furthermore, in this case, the bearings 20 and 35 are unnecessary, and the structure can be simplified.

  Moreover, in the water stop structure of 1st Embodiment, although the airtight member 40 was provided inside the water stop member 30 (indoor side), embodiment of this invention is not restricted to this. For example, even if the airtight member 40 is omitted, the waterstop of the building 10 can be obtained by the waterstop member 30. The same applies to the second embodiment.

  Moreover, in the building 10 to which the water stop structure which concerns on 1st Embodiment is applied, although the lower structure 12 made the building main body and the upper structure 16 the big roof, embodiment of this invention is not restricted to this. For example, in a base-isolated building, the lower structure may be an underground structure in which a mat slab and a retaining wall are integrated, and the upper structure may be a building body. Further, in a middle-rise base-isolated building, the lower structure may be a lower housing and the upper structure may be an upper housing. Thus, the water stop structure which concerns on 1st Embodiment is applicable to various seismic isolation structures. The same applies to the second embodiment.

12 Lower structure 14 Seismic isolation device 16 Upper structure 30, 50 Water stop member 32, 52 Water stop plate 34 Seal member 34A Base 34B Rain barrier (outer seal material)
34C Splash barrier (inner seal)
40 Airtight member 54 Rain barrier (seal member)
BV, CV Notch OA Outdoor space (outside space)
MA buffer space (inside space)

Claims (3)

A substructure,
A seismic isolation device installed in the substructure;
An upper structure supported by the seismic isolation device;
A water stop plate provided between the lower structure and the upper structure and having an upper end rotatably connected to the upper structure, and a lower end fixed to the lower end of the water stop plate A water stop member comprising a structure and a slidable seal member;
Having a water stop structure. On the inner side of the water stop member, an airtight member is provided that has a lower end fixed to the lower structure, an upper end contacting the upper structure, and forming an inner space with the water stop member,
The water stop structure according to claim 1, wherein the seal member is provided with a notch communicating the outer space of the water stop member and the inner space. The sealing member is
A pedestal fixed to the lower end of the water stop plate;
An outer sealing material fixed to the outside of the lower surface of the pedestal, and
An inner sealing material fixed to the lower surface inside of the pedestal part,
The notches are formed in the outer sealing material and the inner sealing material, respectively, and are shifted from the rainwater intrusion direction.
The water stop structure according to claim 2.