JP4780545B2 - Water stop structure of post-installed seismic slit - Google Patents

Description

  It is provided between a non-structural wall such as a drooping wall, a waist wall or a sleeve wall of a concrete building and a structural frame such as a column or a beam. The present invention relates to a water-stop structure of an earthquake-resistant slit provided to prevent this.

  Seismic slits are provided at the joints between non-structural walls such as waist walls, sleeve walls and vertical walls, and structural frames such as columns and beams, preventing shear fracture and brittle fracture of structural frames due to non-structural walls during earthquakes. Therefore, in order to secure a dimension that can follow the interlayer deformation angle of 1/100 in order to be provided, it is usually 25 mm to 50 mm, and it is difficult to provide this narrow slit portion on the concrete wall, Therefore, the conventional earthquake-resistant slit material is attached by attaching the slit material to the formwork and driving it into the concrete when assembling the formwork. Therefore, in addition to fire resistance, compressibility (deformable width, deformability), and interlayer deformation / watertightness, which are the required performance required for earthquake-resistant slit materials, it is necessary to have strength to withstand the lateral pressure during concrete placement. The strength and compressibility (deformable width, deformation recovery property) of the opposite strength are secured at the same time. Further, hardware for fixing and reinforcing material for straight mounting are required, which makes it expensive and attaches on top of it. However, it is difficult to manage the construction such as the slit material is bent and attached. Also, sealing is applied to stop the water. However, if the width of the ceiling exceeds 25mm, the appearance is poor and the quality of the construction is difficult to control. It is difficult to secure. Many materials and structures for this earthquake-resistant slit have been proposed.

  As an example of the proposal of the seismic slit when cutting the entire cross section of the wall, the seismic structure of the structure disclosed in Japanese Utility Model Application No. 56-138169 is applied along the both ends of the long elastic slit body. It is a structural slit material characterized by being fixed with a supporting piece having a concave groove to be joined and several supporting bolts arranged in the vicinity of both side faces in the short piece direction of the elastic slit main body.

  The slit joint material of a concrete wall disclosed in Japanese Utility Model Application No. 1-67728 is provided with at least one hook-shaped engagement groove along the longitudinal direction of the side surface of a joint material such as polyethylene closed foam or glass wool. A substrate with an integrally formed substrate, an engagement piece at one end, and a separator mounting hole at the required spacing of the arm is removable along the hook-shaped engagement groove on the substrate Is engaged.

  The through slit forming member disclosed in Japanese Patent Application No. 9-213016 uses the slit material as the first slit and the second slit, and the separator is inserted in a state in which the operating range where each can be further approached is left, and the thickness direction of the through slit It is a through slit forming member that can be relatively moved when an external force such as an earthquake is applied after it is temporarily fixed to the mold while being in a state incapable of being moved and the separator is removed after the concrete is hardened.

  Seismic slits are required to have fire resistance, compressibility (deformable width, deformation recovery property), interlayer deformation and watertightness, and must be strong enough to withstand the lateral pressure when placing concrete. In the case of using polyethylene closed foam or glass wool as a joint material, in order to obtain the strength to withstand the side pressure when placing concrete, the support piece that engages the slit body and the support that is placed near both sides Bolts must be supported and fixed, and there is a risk of water leakage between the support piece and the concrete.

  The slit joint material is a joint material such as polyethylene closed-cell foam or glass wool, and a substrate on which at least one hook-shaped engagement groove portion is integrally formed on one side surface along the longitudinal direction of the side surface is attached. In that case, the support engaged with the substrate is attached to the separator and fixed, but it is difficult to align the joint rod and joint material attached to the inside of the formwork, and it takes time and effort to secure the joint material. Therefore, the slit material becomes expensive and it takes time and effort to attach the substrate.

If the slit material is the first slit and the second slit and the separator is inserted in a state where the operating range in which the slit material can be further approached is left, the first slit and the second slit are fixed in order to fix the slit material to the separator. 2 Each of the insertion holes provided in the slits must be aligned with the separator attached to the formwork, and when assembling the return formwork, it must be aligned in an invisible state, and installation is troublesome. Since it is a combination of two members, the slit material is expensive.

  In view of the above, in order to achieve the above-mentioned object, the present invention provides a slit part in the joint form frame made of paper core panel of Japanese Patent No. 3252571 according to the invention of the present applicant, and inserts a slit material into this slit part. By using seismic slits, the required performance of the slit material is reduced to fire resistance, compressibility (deformable width, deformation recoverability), inter-layer deformation and water tightness, and reinforcement and fixed hardware necessary for driving into concrete. The purpose is to provide a waterproof structure for seismic slits with good workability and quality.

According to the first aspect of the present invention, the distal end portion 12 of the Y-shaped core material 2 is fitted into the concave portion of the U-shaped elastic refractory material 1 in the slit portion 6 provided by attaching and removing the joint mold. In the state, it is inserted into the slit portion 6 and attached, and the opposite side of the tip portion 12 forms a backup material of the elastic sealing material 5, and the fitting portion 11 is formed on the opposite side of the tip portion 12 of the core material 2. Then, after filling the elastic sealing material 5, the fitting protrusion 10 at the end of the cap 4 having a T-shaped cross section penetrates the elastic sealing material 5 and is fitted to the fitting portion 11 of the core material 2. It is a water-stop structure of post-construction seismic slit characterized by

In the invention of claim 2, the elastic refractory material 1 having a rectangular cross section is inserted into the slit portion 6 provided by attaching and removing the joint mold, and then the adhesive waterproofing material 8 is attached only to the tip portions on both sides. The cover 7 having a W-shaped cross section is inserted into the slit portion 6, and then the leg portion 13 of the lid portion 15 having a T-shaped cross section is fitted into the concave portion of the cover 7. It is the water stop structure of the post-construction seismic slit characterized by pressing the material 8 against the slit portion 6.

  A slit part is provided in the joint mold, and a slit material is inserted into the slit part to form an earthquake-resistant slit, so that a so-called post-construction earthquake-resistant slit material 3 is obtained, so that the required performance of the slit material is fireproof and compressible ( It has the effect that it can be made into an earthquake-resistant slit material that does not require the reinforcing material and fixed hardware required when it is driven into concrete, while narrowing down to the deformable width, deformation recovery property) and interlayer deformation / watertightness.

  The seismic slit material is a combination of an elastic refractory material 1 that secures fire resistance and compressibility (deformable width, deformation recovery property) and an elastic sealing material 5 that secures interlayer deformation and watertightness or an adhesive water-stop material 8 Thus, there is an effect that it is possible to obtain an earthquake-resistant slit material that takes advantage of the characteristics of the constituent materials.

  The ribs 17 on the side surfaces of the elastic refractory material 1 are in close contact with the slit portion 6 and have an effect of improving the performance of compressibility (deformable width, deformation returnability).

  The Y-shaped core material 2 forms a backup material for the elastic sealing material 5, and has an effect of firmly fixing the cap 4 by fitting the fitting protrusion 10 of the cap 4.

  The cap 4 conceals the elastic sealing material 5, prevents deterioration of the elastic sealing material 5 due to ultraviolet rays, and improves the durability of the elastic sealing material 5. Further, the cap 4 is formed between the cap 4 and the elastic sealing material 5. The gap 19 has an effect that the elastic sealing material 5 does not protrude from the cap 4.

  By fitting the leg portion 13 of the lid portion 15 to the cover 7, the tip end portion of the cover 7 is inverted and spread, and the adhesive water-stopping material 8 is pressed against the slit portion 6 to ensure water stoppage. is there.

  The joint form frame has a paper core and other surface plates bonded to both sides of the paper core, and the paper core and surface plate are coated with a waterproofing agent that maintains waterproofness for a predetermined time. The removal member is attached. The joint formwork is attached to a predetermined slit portion to assemble the formwork, and after placing the concrete, the joint formwork is removed after a concrete curing period. When removing the joint formwork, the paper core and the surface plate absorb the excess water of the concrete and become soft to some extent, and can be easily removed.

The width of the post-construction seismic slit material 3 is determined by the length of the wall of the construction site, this width is the length of one side, so that the post-construction seismic slit material 3 does not hit the anchor bars arranged at the center of the wall. The size should be less than half the wall thickness. The post-construction seismic slit material 3 according to claim 1 is a combination of an elastic refractory material 1 that ensures fire resistance and compressibility (deformable width, deformability) and an elastic sealing material 5 that ensures interlayer deformation and water tightness. The post-construction seismic slit material 3 according to claim 2 is composed of an elastic refractory material 1 that secures fire resistance and compressibility (deformable width, deformation recovery property), and an adhesive waterproofing material 8 that secures interlayer deformation and water tightness. This is a combined configuration.

  The elastic refractory material 1 is intended to ensure the required fire resistance and compressibility (deformable width, deformability) required for the seismic slit material. The elastic refractory material 1 includes silicon rubber, chloroprene rubber, ethylene A foam having fire resistance such as propylene rubber is suitable.

The shape of the elastic refractory material 1 in the case of claim 1 is U-shaped in cross section, and is pressed and attached to the slit portion 6 in a state of being compressed and deformed so that both side surfaces are always urged to the slit portion 6. The width of the elastic refractory material 1 fitted into the concave portion is a length obtained by adding a deformation width to the width of the predetermined slit portion, and the core material 2 is fitted in the center in the thickness direction of the object. It is a long object having a U-shaped cross section with a recess and a wall length. In the case of claim 2 , since the core material 2 is not fitted, the width of the elastic refractory material 1 is a rectangle whose one side is a width obtained by adding the deformation width to the width of the predetermined slit portion, and the length of the wall length. Measure

  Naturally, the elastic refractory material 1 has compressibility (deformable width, deformation recovery property), but in order to ensure compressibility performance, ribs 17 may be formed on both side surfaces of the slit material, and the cross section is hollow. It is not limited to any of solid shapes and combinations thereof.

  The width of the earthquake-resistant slit ensures a dimension capable of following an interlayer deformation angle of 1/100, so it is determined by the length of the wall, and this width is usually 25 mm to 50 mm and becomes the width of the ceiling. Conventionally, the relationship between the sealing width (W) and the sealing depth (D) is set to D / W = 1/1 to 1/2 in order to prevent stress concentration on the bonded portion due to variation in the sealing width. . When the depth (D) is increased, the water stop performance is improved, but the width (W) must also be increased. When the width of the ceiling exceeds 25 mm, not only the appearance is bad, but also construction management and quality control become difficult.

  The core material 2 in the case of claim 1 is inserted in the slit portion 6 in a state where the tip portion 12 is fitted in the concave portion of the elastic refractory material 1 having a Y-shaped cross section and a U-shaped cross section. And a fitting portion 11 for fixing the cap 4 by fitting the fitting protrusion 10 of the cap 4 through the elastic sealing material 5 after the elastic sealing material 5 is filled. It is a long object with a Y-shaped cross section.

  The core material 2 uses a solid material having fire resistance such as silicon rubber, chloroprene rubber, ethylene propylene rubber, polyethylene, polyurethane, polyvinyl chloride, etc., which is harder than the elastic refractory material 1, but also corrodes aluminum, stainless steel, etc. It is also possible to use a material that is durable and harder than the elastic refractory material 1.

  The elastic sealing material 5 is for ensuring interlayer deformation and watertightness of the required performance required for the seismic slit material. As a specific example of the material, a silicon-based material or a modified silicon-based material specified in JIS A5758 Polysulfide, modified polysulfide, acrylic urethane, and the like can be used, and those chemically stable at the joint surface between the elastic refractory material 1 and the core material 2 are preferable.

  The cap 4 is a long object having a T-shaped cross section and covers the slit portion 6 so that the width of the top portion is larger than the width of the slit portion 6, and the hook-shaped fitting protrusion 10 is fitted to the core material 2. The part 11 is spread and fixed to fix the cap 4, and is a semi-rigid extruded long material such as weather-resistant silicon rubber, chloroprene rubber, ethylene propylene rubber, polyethylene, polyurethane, polyvinyl chloride, etc. .

The cover 7 is a combination of the adhesive water-stopping material 8 and the lid portion 15 for ensuring interlayer deformation and watertightness of the required performance required for the earthquake-resistant slit material. The adhesive waterproofing material 8 is attached only to the tip portions on both sides and inserted into the slit portion 6, and the flange portion 14 is in contact with and fixed to the wall surface 18. When the cover 7 is inserted into the slit portion 6, the adhesive 13 is attached to the leg portion 13 of the lid portion 15 so as to be narrowed inward so that the adhesive waterproofing material 8 attached only to the tip portions on both sides does not contact the slit portion 6. Then, the front end portion of the cover 7 is inverted and pushed, and the adhesive water-stopping material 8 is pressed against the slit portion 6 to ensure water-stopping. Suitable materials are semi-rigid silicon rubber, chloroprene rubber, ethylene propylene rubber, polyethylene, polyurethane, polyvinyl chloride, etc. that maintain the shape and can be deformed as described above.

Adhesive water-stopping material 8 is a tape of butyl rubber or the like attached to both ends of the cover 7 and protected with a protective seal 16. The protective seal 16 is peeled off when the cover 7 is attached, and the slit 6 is covered with a cover. Insert 7 and install.

  The lid portion 15 is made of silicon rubber, chloroprene rubber, ethylene propylene rubber, polyethylene, polyurethane, polyvinyl chloride, etc. having semi-hard weather resistance. The lid portion 15 covers the slit portion 6 with a long T-shaped cross section. The width is larger than the width of the slit portion 6, and the leg portion 13 is attached to the slit portion 6 so as to press the cover 7 against the slit portion 6 at all times. The ribs 17 may be formed on both side surfaces of the leg portion 13 in contact with the cover 7, and the cross section is not limited to any one of a hollow shape, a solid shape, and a combination thereof.

  An embodiment of claim 1 will be described with reference to FIGS. 5, 6, 7, 8, and 9. 5 is a partially cutaway perspective view showing a state where another post-construction seismic slit material 3 is attached, FIG. 6 is an exploded cross-sectional view of the post-construction seismic slit material 3, and FIG. 8 is a cross-sectional view showing a state where 2 is fitted, FIG. 8 is a cross-sectional view showing a state where a part of the post-construction seismic slit material 3 is attached to the slit portion, and FIG. It is sectional drawing which shows the state attached. The specifications of the wall and the width of the slit portion 6 are the same as described above, the wall thickness is 170 mm, the distance between the anchor bars D10 is 400 mm, and the width of the slit portion 6 is 25 mm. It is the same.

    After the joint mold is removed, the slit portion 6 is inserted into the slit portion 6 in a state where the tip portion 12 of the core material 2 having a Y-shaped cross section is fitted into the concave portion of the elastic refractory material 1 having a U-shaped cross section. The width of the elastic refractory material 1 in a state where the core material 2 is fitted is 35 mm, this is compressed and deformed to a width of 25 mm, the dimension from the wall surface 18 to the core material 2 is set to 20 mm, and then the slit portion 6 is filled with 15 mm of the elastic sealing material 5. After the elastic sealing material 5 is filled, the sealing material 5 is penetrated and the fitting protrusion 10 of the T-shaped cap 4 is fitted to the fitting portion 11 of the core material 2 to complete the construction. The mounting dimension of the post-construction seismic slit material 3 is 70 mm from the wall surface 18. In this case, the elastic refractory material 1 is a foam of silicon rubber, the core material 2 is a solid of silicon rubber, the elastic sealing material 5 is modified silicon, and the cap 4 is semi-rigid polyvinyl chloride.

  An embodiment of claim 2 will be described with reference to FIGS. 10, 11, 12, and 13. FIG. FIG. 10 is a partially cutaway perspective view showing a mounting state of another post-construction seismic slit material 3, FIG. 11 is an exploded sectional view of the post-construction seismic slit material 3, and FIG. FIG. 13 is a cross-sectional view showing a state in which the post-construction seismic slit material 3 is attached to the slit portion. The specifications of the wall and the width of the slit portion 6 are the same as described above, the wall thickness is 170 mm, the distance between the anchor bars D10 is 400 mm, and the width of the slit portion 6 is 25 mm. It is the same.

  The elastic refractory material 1 having a rectangular cross section is inserted into the slit portion 6 into the slit portion 6 after the joint mold is removed. The elastic refractory material 1 has a width of 35 mm, and is compressed and inserted to a width of 25 mm. The dimension from the wall surface 18 to the elastic refractory material 1 is 20 mm. Next, the protective seal 16 of the adhesive water-proof material 8 provided at the bottom on both sides of the tip of the W-shaped cover 7 is peeled off, and the cover 7 is inserted into the slit portion 6. Next, the leg portion 13 of the lid portion 15 having a T-shaped cross section is fitted into the concave portion of the cover 7, the cover 7 is spread out, and the adhesive water blocking material 8 is pressed against the slit portion 6 to complete the construction. The dimension of the cover 7 is 15 mm from the wall surface 18, and the installation dimension of the seismic slit material 3 after the installation is completed is 70 mm from the wall surface 18. In this case, the elastic refractory material 1 is a foam of silicon rubber, the cover 7 is semi-rigid polyvinyl chloride, the adhesive waterproofing material 8 is butyl rubber, and the lid 15 is semi-rigid polyvinyl chloride.

It is a partially notched perspective view which shows the attachment state of the post-construction earthquake-resistant slit material of a reference example. It is a disassembled sectional view of a post-construction seismic slit material. It is a partially assembled sectional view of the post-construction seismic slit material. It is sectional drawing which shows the attachment state of a post-construction seismic slit material same as the above. It is a partially notched perspective view which shows the attachment state of the post-construction seismic slit material of Claim 1. It is a disassembled sectional view of a post-construction seismic slit material. It is a partially assembled sectional view of the post-construction seismic slit material. It is sectional drawing which shows the partial attachment state of a post-construction seismic slit material same as the above. It is sectional drawing which shows the attachment state of a post-construction seismic slit material same as the above. It is a partially notched perspective view which shows the attachment state of the post-construction seismic slit material of Claim 2. It is a disassembled sectional view of a post-construction seismic slit material. It is sectional drawing which shows the partial attachment state of a post-construction seismic slit material same as the above. It is sectional drawing which shows the attachment state of a post-construction seismic slit material same as the above.

DESCRIPTION OF SYMBOLS 1 Elastic fireproof material 2 Core material 3 Post-construction earthquake-proof slit material 4 Cap 5 Elastic sealing material 6 Slit part 7 Cover 8 Adhesive water stop material 9 Small edge 10 Fitting protrusion 11 Fitting part 12 Tip part 13 Leg part 14 Ridge part 15 Lid 16 Protective seal 17 Rib 18 Wall 19 Clearance

Claims (2)

Insert and seat the slit (6) in a state where the top portion (12) and fitted in the cross section Y-shaped core member (2) in the recess of the U-shaped section of the elastic refractory material (1), the tip portion The opposite side of (12) forms a backup material for the elastic sealing material (5), and the fitting part (11) is formed on the opposite side of the tip (12) of the core material (2). After filling the material (5), the fitting protrusion (10) at the end of the cap (4) having a T-shaped cross section passes through the elastic sealing material (5), and the fitting portion of the core material (2) The water stop structure of the post-construction seismic slit characterized by being fitted to (11). An elastic refractory material (1) having a rectangular cross section is inserted into the slit portion (6), and then a W-shaped cover (7) having an adhesive water-stopping material (8) attached only to the tip portions on both sides is attached to the slit portion ( 6), and then the leg (13) of the lid (15) having a T-shaped cross section is fitted into the recess of the cover (7), and the cover (7) is expanded to spread the adhesive water-proof material (8). Water stop structure of post-construction seismic slit, characterized in that is pressed against the slit (6).

Images