JP4448066B2 - Flexible waterproof joint and its construction method - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a flexible waterproof joint and a construction method thereof, and enables waterproofing and relative displacement of joint parts of concrete structures such as waterways, water treatment facilities, tunnels, joint grooves, etc. constructed by passing concrete. The preparatory work in the construction of a flexible water-stopping joint can be simplified.

  The joints of wall parts such as waterways, water tanks, or underground gutters built in the ground such as joint grooves, which are concrete structures constructed by passing concrete over, stop both inside and outside and the concrete structures on both sides It is necessary to allow expansion and contraction of the wall part due to the earthquake displacement and temperature change, and a flexible water stop joint such as a water stop plate is interposed.

  As a flexible water-stopping joint interposed in a joint portion of such a concrete structure, for example, there is a water-stop plate 1 disclosed in Patent Document 1, and as shown in FIG. A plurality of locking ridges 3 are provided at both ends, and the locking ridges 3 at the respective ends are embedded and fixed in the concrete to be placed.

Moreover, as a flexible waterproof joint for concrete structures such as joint grooves, for example, there is a flexible rubber joint 6 disclosed in Patent Document 2, and as shown in FIG. The curved portion 7 and a pair of flange portions 8 that are integrally connected between the open ends of the curved portion 7 and are fixed in a substantially V-shaped cross section with the curved portion 7 interposed therebetween are configured. As shown in (b), the anchor bolt 9 attached to the flange portion 8 is buried and fixed in the concrete to be cast.
JP-A-9-105166 JP 2002-167789 A

  However, in the flexible water-stopping members 1 and 6 of Patent Document 1 and Patent Document 2 described above, it is necessary to hold the flexible water-stopping members 1 and 6 in a predetermined position before placing concrete. There exists a problem that the rigidity of these flexible water-stop members 1 and 6 itself is low and a shape cannot be hold | maintained.

Therefore, in the case of the water stop plate 1 of Patent Document 1, as shown in FIG. 9 (b), the preceding protruding protrusion 3 on the concrete side is suspended from the reinforcing reinforcing bar 4, and There is a problem that it is necessary to hold the locking ridges 3 to be embedded in the concrete later with a holding material 5 such as a plate material, and preparation work before placing the concrete is difficult and takes time and effort.

  Further, in the flexible rubber joint 6 of Patent Document 2, as shown in FIG. 10B, the anchor bolt 9 and the reinforcing bar 4 are welded via the joint 10 in a state where the anchor bolt 9 is attached to the flange portion 8. At the same time, the angle holding member 11 is attached to the outside of the pair of flange portions 8 so that the angle can be maintained. In this case as well, preparation work before placing the concrete is difficult, and there is a problem that it takes time and effort. .

  The present invention has been made in view of the problems of the prior art, and it is simple and short for preparatory work before placing concrete in the case of constructing a structure by handing over concrete by imparting shape retainability. It is an object of the present invention to provide a flexible water-stopping joint that can be carried out in time and a method for its construction.

  In order to solve the above-mentioned problem, a flexible water-stopping joint according to claim 1 of the present invention is provided at a joint portion of a concrete structure constructed by passing over preceding and following concrete, A flexible water-stopping joint that enables relative displacement of the joint portion, and a leading placement fixing portion and a trailing placement fixing portion that are embedded and fixed in the preceding and following concrete structures by placement, and An expansion / contraction part provided between the preceding placement fixing part and the subsequent placement fixing part and capable of water stopping and relative displacement, and provided outside the preceding placement fixing part, the subsequent placement fixing part and the extension part. The foam support is formed of a foam material whose inner surface is substantially coincident with the outer surface of the flexible waterproof joint so that the shape can be maintained and the outer surface is substantially flush with the outer surface of the concrete structure. And comprising a member It is an butterfly.

  According to this flexible water-stopping joint, it is provided in a joint part of a concrete structure that is constructed by passing over preceding and succeeding concrete, and is capable of allowing internal and external water-stopping and relative displacement of the joint part. A water-stopping joint, a preceding casting fixing portion and a trailing casting fixing portion that are embedded and fixed to the preceding and following concrete structures by casting, and the preceding casting fixing portion and the following casting fixing. An expansion / contraction part provided between the parts and capable of water stopping and relative displacement, and the leading surface fixing part, the trailing casting fixing part, and the expansion / contraction part provided on the outer surface of the flexible water sealing joint And a foam supporting member formed of a foam material whose outer surface is substantially flush with the outer surface of the concrete structure. Foam support member provided outside the water joint Holds the Jo, it prevents the inflow of concrete, yet be able to maintain the deformability of the flexible waterproofing joint by compression deformability of the foam support member itself. In addition, by supporting the water-tight joint that retains its shape on the end frame through the support member and placing concrete, the outer surface of the foam support member can be used for the joint portion of the concrete structure to be constructed. It becomes possible to be almost flush with the outer surface. Thereby, preparatory work, such as attachment before the concrete placement of the flexible waterproof joint, can be performed easily and in a short time.

  According to a second aspect of the present invention, in addition to the structure according to the first aspect, the leading and trailing placement fixing portions are separated from the plate-shaped side seal portion and the side seal portion. It is characterized by comprising an anchor portion protruding.

  According to this flexible water-stopping joint, the preceding and subsequent placing fixing portions are configured to include a plate-shaped side surface seal portion and an anchor portion protruding from the side surface seal portion. With this, water can be stopped on the outer surface side of the concrete structure, and at the same time, the anchor portion is buried and fixed by placing concrete so that it can be easily constructed.

  Furthermore, the flexible waterproof joint according to claim 3 of the present invention is formed in addition to the configuration according to claim 2, and the side seal portion is formed at an angle corresponding to a joint slope formed facing the joint portion. It is characterized by being formed.

  According to this flexible waterproof joint, the side seal portion is formed at an angle corresponding to a joint slope formed to face the joint portion, and the joint slope of the joint portion of the concrete structure faces the joint slope. Even in the case of the configuration, the side seal portion has a corresponding angle, and the flexible water-stop joint can be placed and fixed as it is, so that the construction can be easily performed.

  Moreover, in addition to the structure in any one of Claims 1-3, the expansion-contraction part is a hollow inverted trapezoid shape, W shape, and reverse U-shape. It is comprised by either cross-sectional shape of these.

  According to this flexible waterproof joint, the expansion / contraction part is constituted by a cross-sectional shape of any one of a hollow inverted trapezoidal shape, a W-shape, and an inverted U-shape, and ensures a sufficient expansion / contraction allowance. The displacement of can be absorbed.

  Furthermore, in addition to the structure in any one of Claims 1-4, the flexible water-stopping joint of Claim 5 of this invention is provided in the said flexible water-stopping joint arrange | positioned at the upper part of the said joint part. A through hole for venting air is provided in the air hole.

  According to this flexible water-stopping joint, the flexible water-stopping joint disposed at the upper part of the joint portion is provided with a through hole for venting the air vertically, and the lower side of the flexible water-stopping joint It is possible to discharge the air accumulated around and prevent the concrete from entering by the air and prevent the water stoppage from decreasing.

  According to a sixth aspect of the present invention, there is provided a construction method for a flexible water-stopping joint, which is provided at a joint portion of a concrete structure constructed by piercing the preceding and succeeding concrete, and the water-stopping inside and outside the joint. When the flexible water-stopping joint that enables relative displacement of the parts is constructed, the flexible water-stopping shape whose shape is held by the foam support member made of a foam material on the casting mold for placing the preceding concrete structure After the joint is supported via the support member, the preceding concrete is cast to embed and fix the preceding casting fixing portion, and then the supporting member is removed and the subsequent concrete is cast to the subsequent casting. It is characterized in that the fixing part is buried and fixed.

  According to the construction method of this flexible waterproof joint, it is provided in the joint part of the concrete structure constructed by piercing the preceding and succeeding concrete, and the inner and outer waterproofing and the relative displacement of the joint part are possible. When constructing a flexible water-stopping joint, the flexible water-stopping joint whose shape is held by a foam support member made of a foam material is placed on a wife mold frame for placing a preceding concrete structure via a support member. After supporting, the preceding concrete is placed and the preceding placement fixing portion is buried and fixed. Then, the support member is removed and the subsequent concrete is placed and the subsequent placement fixing portion is buried and fixed. By doing so, placing the flexible water-stopping joint, which is held by the foam support member provided outside the flexible water-stopping joint, on the wife formwork via the support member, placing concrete, Removal of flexible waterproof joint before placing concrete And easy preparation of Kenado it is possible to perform in a short time. Thereby, the inflow of concrete can be prevented by the foam support member, and the deformation performance of the flexible waterproof joint can be maintained by the compression deformability of the foam support member itself.

  Furthermore, in addition to the structure of Claim 6, the construction method of the flexible waterproof joint according to Claim 7 of this invention provides the position adjustment mechanism in the said support member, and the support position of the said flexible waterproof joint is set. It is characterized by adjusting and placing the preceding concrete.

  According to the construction method of the flexible water-stopping joint, the support member is provided with a position adjusting mechanism to adjust the support position of the flexible water-stopping joint and to place the preceding concrete. By adjusting the attachment position of the flexible waterproof joint through the position adjustment mechanism of the support member attached to the mold, preparation before construction can be further facilitated.

  Moreover, the construction method of the flexible water-stopping joint according to claim 8 of the present invention is that, in addition to the configuration according to claim 6 or 7, a waterproof sheet is laid on the leveled concrete when the lower part of the concrete structure is constructed. After that, the outer surface of the foam support member is placed.

  According to the construction method of the flexible waterproof joint, when the lower part of the concrete structure is constructed, a waterproof sheet is laid on the leveled concrete, and then the outer surface of the foam support member is placed. The waterproof sheet can be easily attached to the lower part of the structure, and the water stoppage can be improved.

  Furthermore, in addition to the structure in any one of Claims 6-8, the construction method of the flexible water-stopping joint of Claim 9 of this invention is the said flexible water-stopping in the case of construction of the upper part of the said concrete structure. The joint is provided with a through-hole for venting air that vertically penetrates the joint, and after concrete is cast, the through-hole is closed and a waterproof sheet is provided.

  According to the construction method of the flexible water-stopping joint, when the top of the concrete structure is constructed, after placing the through-holes for venting the top and bottom of the flexible water-stopping joint, and placing the concrete, It is designed to close the through-hole and provide a waterproof sheet, which can discharge the accumulated air that wraps around the bottom of the flexible waterproof joint, prevents the concrete from entering by air, By closing the through hole and providing a waterproof sheet, it is possible to ensure water-stopping.

  Moreover, in addition to the structure in any one of Claims 6-9, the construction method of the flexible water-stopping joint of Claim 10 of this invention changes to the said end form after placing the said prior concrete. In this case, a foam joint material is provided to place concrete afterwards.

  According to the construction method of this flexible waterproof joint, after placing the preceding concrete, the foam concrete is provided in place of the wife formwork, and the subsequent concrete is placed immediately. You will be able to place the concrete behind you.

  According to the flexible waterproof joint according to claim 1 of the present invention, it is provided in the joint portion of the concrete structure constructed by piercing the preceding and succeeding concrete, and the water seal inside and outside and relative to the joint portion. A flexible water-stopping joint that enables displacement, a preceding placement fixing portion and a following placement fixing portion that are embedded and fixed to the preceding and following concrete structures by placement, and these preceding placement fixing Telescopic part provided between the upper part and the subsequent placing fixing part and capable of water stoppage and relative displacement, and the inner surface provided on the outer side of the preceding placing fixing part, the subsequent placing fixing part and the elastic part. A foam supporting member formed of a foam material, the outer surface of which is substantially coincident with the outer surface of the flexible waterproof joint so that the shape can be maintained, and the outer surface is substantially flush with the outer surface of the concrete structure. Flexible water-stopping joint The foam supporting member provided on the outside can maintain the shape, prevent the inflow of concrete, and maintain the deformation performance of the flexible waterproof joint by the compressive deformability of the foam supporting member itself. it can. In addition, by supporting the water-tight joint that retains its shape on the end frame through the support member and placing concrete, the outer surface of the foam support member can be used for the joint portion of the concrete structure to be constructed. It can be substantially flush with the outer surface. Thereby, preparatory work, such as attachment before concrete placement of a flexible waterproof joint, can be performed easily and in a short time.

  Moreover, according to the flexible water-stop joint according to claim 2 of the present invention, the preceding and subsequent placing fixing portions include a plate-like side surface seal portion and an anchor portion protruding from the side surface seal portion. Therefore, the side seal portion can stop water on the outer surface side of the concrete structure, and at the same time, the anchor portion is buried and fixed by placing concrete so that the construction can be easily performed.

  Further, according to the flexible waterproof joint according to claim 3 of the present invention, the side seal portion is formed at an angle corresponding to a joint slope formed facing the joint portion. Even when the joint portion is composed of opposing joint slopes, the side seal portion has a corresponding angle, and can be easily constructed by placing and fixing the flexible waterproof joint as it is.

  Moreover, according to the flexible water-stop joint according to claim 4 of the present invention, the expansion / contraction part is constituted by a cross-sectional shape of any one of a hollow inverted trapezoidal shape, a W-shape, and an inverted U-shape. The expansion / contraction allowance can be secured and the displacement of the joint portion can be absorbed.

  Furthermore, according to the flexible waterproof joint according to claim 5 of the present invention, since the flexible waterproof joint disposed at the upper part of the joint portion is provided with a through hole for venting up and down. In addition, it is possible to discharge the air accumulated around the lower side of the flexible water-stop joint, and the concrete can be prevented from entering by the air, and the water stoppage can be prevented from being lowered.

  Moreover, according to the construction method of the flexible water-stopping joint according to claim 6 of the present invention, the water-stopping inside and outside provided on the joint portion of the concrete structure constructed by passing over the preceding and succeeding concrete, When constructing a flexible water-stopping joint that enables relative displacement of the joint portion, the flexible shape whose shape is held by a foam support member made of foam material is placed on the wife mold frame for placing the preceding concrete structure. After supporting the water stop joint through the support member, after placing the preceding concrete and burying and fixing the preceding placement fixing portion, then removing the support member and placing the subsequent concrete Since the row fixing part is buried and fixed, the flexible waterproof joint, whose shape is held by the foam support member provided outside the flexible waterproof joint, is supported by the wife mold frame via the support member. Flexible water-stopping joint by placing concrete It is possible to perform preparatory operations, such as installation of concrete 設前 easily and in a short time. Thereby, the inflow of concrete can be prevented by the foam support member, and the deformation performance of the flexible waterproof joint can be maintained by the compression deformability of the foam support member itself.

  Furthermore, according to the construction method of the flexible waterproof joint according to claim 7 of the present invention, the support member is provided with a position adjusting mechanism to adjust the support position of the flexible waterproof joint, and the preceding concrete is Since the placement is performed, the attachment position of the flexible waterproof joint can be adjusted via the position adjustment mechanism of the support member attached to the wife formwork, and the construction can be further facilitated.

  According to the construction method of the flexible waterproof joint according to claim 8 of the present invention, when constructing the lower part of the concrete structure, after laying a waterproof sheet on the leveled concrete, the outer surface of the foam support member is Since it is placed, the waterproof sheet can be easily attached to the lower part of the concrete structure, and the water stoppage can be improved.

  Furthermore, according to the construction method of the flexible waterproof joint according to claim 9 of the present invention, when the upper part of the concrete structure is constructed, a through hole for venting air vertically passing through the flexible waterproof joint is provided. After installing and placing concrete, the through hole is closed and a waterproof sheet is provided, so that the air accumulated around the bottom of the flexible waterproof joint can be discharged and the concrete will not enter by air This can be prevented, and the water-stopping property can be ensured by closing the through-hole after the placement and providing a waterproof sheet.

  Further, according to the construction method of the flexible waterproof joint according to claim 10 of the present invention, after the preceding concrete is cast, a foam joint material is provided instead of the end form and the subsequent concrete is cast. Since it was installed, it is possible to quickly place the concrete behind.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 and 2 relate to one embodiment of the flexible water-stop joint of the present invention, FIG. 1 is a schematic perspective view of a concrete structure provided with the flexible water-stop joint, and FIG. 2B is a partial cross-sectional view of the water joint, FIG. 2B is a partial cross-sectional view of the installation state after the construction of the flexible waterproof joint, and FIGS. 3 and 4 show the construction method of the flexible waterproof joint of the present invention. 3A is a cross-sectional view of the upper construction state, FIG. 3B is a view taken in the direction of arrow A in FIG. 3A, and FIG. 4 is a side and lower construction state, respectively. FIG. 5 is a schematic cross-sectional view of a support member having a position adjusting mechanism.

  The flexible water-stop joint 20 can stop the joint portions 14 of the concrete structures 12 and 13 constructed by passing over the concrete, and can relatively displace the concrete structures 12 and 13 on both sides of the joint portion 14. It is what.

  A joint groove, which is an example of a concrete structure, is formed by connecting boxes 12 and 13 having a rectangular cross-sectional shape and a predetermined length by a joint portion 14. Thus, it is constructed by connecting the joint portion 14 every predetermined length (every box), and after completion, it is buried in the ground at a predetermined depth.

  As shown in FIG. 2, the flexible waterproof joint 20 provided in the joint portion 14 of the concrete structures 12 and 13 is called a so-called outer waterproofing waterproof board, and is fixed by prior placement. And a stretchable portion 23 that allows water stop and relative displacement by expanding and contracting between the preceding cast fixed portion 21 and the subsequent cast fixed portion 22. It is integrally formed in the cross-sectional direction by a flexible material such as rubber or synthetic resin, and in the longitudinal direction, the divided part is formed into a ring or the like in the factory or on the site according to the shape of the joint part 14. At the same time, in order to maintain the shapes of the preceding placement fixing portion 21, the subsequent placement fixing portion 22 and the expansion / contraction portion 23, foaming made of a foam material that is disposed outside these and is bonded or partially bonded. A support member 24 is provided.

  The preceding placement fixing portion 21 and the subsequent placement fixing portion 22 of the flexible water-stopping joint 20 are respectively provided on the side surfaces of the preceding concrete structure 12 to be placed first and the subsequent concrete structure 13 to be placed later. It includes plate-like side seal portions 21a and 22a to be applied, and protrudes from the side seal portions 21a and 22a into the concrete structures 12 and 13 to form two anchor portions 21b and 22b, The bulging parts 21c and 22c which swelled in the front-end | tip part are formed and comprised. And the anchor part and the bulging part near the end face of the joint part 14 are made larger than the inner part far from the end face, and can be firmly embedded and fixed when being embedded and fixed by placing concrete.

  In addition, butyl sheets 21d and 22d are provided on the inner side surfaces of the side seal portions 21a and 22a, respectively, and are adhered by the adhesive force thereof, and the concrete structures 12 and 13 and the preceding placement fixing portion 21 and the subsequent strike. The water stoppage between the installation and fixing portion 22 can be secured.

  The stretchable portion 23 of the flexible waterproof joint 20 provided between the preceding placement fixing portion 21 and the subsequent placement fixing portion 22 has a hollow substantially inverted trapezoidal cross-sectional shape, and The inverted trapezoidal bottom portion (upper portion of the drawing in the figure) is arranged so as to be substantially flush with the outer surfaces of the side seal portions 21a, 22a of the preceding placement fixing portion 21 and the subsequent placement fixing portion 22. The inverted trapezoidal top portion (lower portion of the drawing in the drawing) of the expansion / contraction part 23 is formed so as to protrude inside the joint part 14. Only the inverted trapezoidal bottom portion (upper portion of the drawing in the figure) where the thickness of the hollow portion of the stretchable portion 23 is outside is made thinner than the other portions, so that the absorption of displacement can be increased.

  The preceding placement fixing portion 21 and the succeeding placement fixing portion 22 that are made of such an elastic material and are arranged in a straight line and the expansion / contraction portion 23 between them have low rigidity and maintain the shape as they are. For example, if the preceding placement fixing portion 21 is supported horizontally, the stretchable portion 23 and the trailing placement fixing portion 22 of the other end hang down, and the flexible water-stop joint 20 before concrete placement is dropped. The installation of becomes difficult.

  Therefore, in this flexible waterproof joint 20, the foam support member 24 is attached to the outside of the flexible waterproof joint 20 so that the shape can be maintained by adhesion or partial adhesion. The foam support member 24 is made of a foam material, such as sponge rubber or polystyrene foam, and has a thickness capable of maintaining the shape of the flexible waterproof joint 20 with its rigidity, and the inner surface is the outer surface of the flexible waterproof joint 20. And the outer casting surface fixing portion 21, the following casting fixing portion 22 and the outer surface of the expansion / contraction portion 23 between them, and the outer surfaces are flush with the outer surfaces of the concrete structures 12, 13. When the concrete structure is completed, irregularities are not formed.

  Adhesion between the foaming support member 24, the leading casting fixing portion 21 and the trailing casting fixing portion 22 of the flexible waterproof joint 20 and the expansion / contraction portion 23 between them is sufficient if the shape can be maintained during construction. After that, there is no problem even if it is separated without being bonded, and either whole surface bonding or partial bonding may be used.

  Next, the construction method to the joint part 14 of the concrete structures 12 and 13 of the flexible waterproof joint 20 comprised in this way is demonstrated with reference to FIGS.

  In this flexible waterproof joint 20, a support member 25 is used to support the flexible waterproof joint 20 using the end form frame 16 assembled to form the end surface 14 a of the joint portion 14. Compared to the case where it is supported and fixed, the concrete can be prepared for placing in a short time.

  Accordingly, the support member 25 will be described with reference to FIG. 5. Two parallel fixing plates 25b are welded or the like perpendicular to the fixing plate portion 25a attached to the end surface of the end form frame 16 which is a steel mold frame with bolts 17. The adjusting plate 25c is slidably disposed as a position adjusting mechanism between the two parallel fixing plates 25b and fixed to one outer side of the parallel fixing plate 25b. The fixing bolt 25d screwed into the nut is passed through, pressed against the adjustment plate 25c and tightened, so that it can be fixed by being sandwiched between the other parallel fixing plate 25b.

  The support member 25 is provided with a support plate portion 25e that supports the flexible waterproof joint 20 at the tip of the adjustment plate 25c, and is formed in a shape corresponding to the inner shape of the flexible waterproof member 20, The flexible waterproof joint 20 is formed in a substantially trapezoidal shape capable of supporting the joint inner surface of the stretchable part 23 and the side seal part 22a and the side face of the stretchable part 23 and the anchor part 22a.

  Further, in order to adjust the position of the adjusting plate 25c, a bracket 25f protruding perpendicularly to the upper part of the parallel fixing plate 25b is attached by welding or the like to fix the nut, and the adjusting bolt 25g screwed into this nut is passed through. The installation position of the flexible waterproof joint 20 can be adjusted by applying the tip part to the support plate part 25e and changing the protruding amount of the adjusting bolt 25g. Thereby, a position adjustment mechanism is comprised by the fixing board part 25a-the adjustment volt | bolt 25g.

  The support member 25 has a shape corresponding to the shape of the joint portion 14, and at least the fixed plate portion 25a, the parallel fixed plate 25b, and the adjustment plate 25c are arranged at a predetermined pitch or continuously arranged, while being directly flexible. As the support plate portion 25e for supporting the water joint 20, a predetermined pitch or a continuous one required for support is used.

  Next, the construction of the flexible waterproof joint 20 performed using such a support member 25 is performed by attaching the fixing plate portion 25a of the support member 25 to the outer end surface of the end frame 16 forming the end surface 14a of the joint portion 14 with bolts. 17, the position of the flexible waterproof joint 20 supported by the support plate portion 25 e is adjusted by changing the protruding amount of the adjusting bolt 25 g, adjusted to a predetermined position, and fixed by tightening the fixing bolt 25 d. To do.

  In this case, in the upper part of the joint part 14 of the concrete structures 12 and 13, as shown in FIG. 3, an air vent hole 26 is formed through the flexible waterproof joint 20 disposed in this part, and the concrete structure The air that wraps around the lower side of the flexible water-stop joint 20 can be discharged.

  In this flexible waterproof joint 20, as shown in FIGS. 3A and 3B, air vent holes 26 are formed at predetermined pitches in the side seal portions 21a and 22a disposed in the upper portion, for example, concrete. The upper surface of the flexible waterproof joint 20 is pressed by a press plate 18 attached to the end form frame 16 so as not to block the air vent hole 26 of the preceding casting fixing portion 21 on the casting side, and after curing, a rubber sheet 27 is attached, and the outside is covered with the waterproof sheet 28.

  Further, as shown in FIG. 4A, a waterproof sheet 28 is applied to the side of the joint portion 14 of the concrete structures 12 and 13 on the outer side of the foam support member 24 of the flexible waterproof joint 20 as necessary. In this state, the mold 19 is installed.

  By carrying out like this, the construction of the waterproof sheet 28 when the side walls of the concrete structures 12 and 13 are close and there is a dirt wall becomes easy.

  Furthermore, in the lower part of the joint part 14 of the concrete structures 12 and 13, as shown in FIG. 4 (b), the end form 16 is installed on the leveling concrete 15 via the presser plate 18, and the leveling concrete. After the waterproof sheet 28 is laid on 15, the outer surface of the foam support member 24 of the flexible waterproof joint 20 is placed and fixed by the support member 25.

  By carrying out like this, in the lower part of the concrete structures 12 and 13, what cannot be constructed after placing the waterproof sheet 28 can be easily constructed.

  In addition, a formwork necessary for the construction of the concrete structure 12 is assembled.

  The attachment of the support member 25 to the wife formwork 16 and the attachment of the flexible waterproof joint 20 may not be performed at the site where the wife formwork 16 is installed. The work is moved to a position where the work is easy at the installation site, and after the flexible waterproof joint 20 is attached, the wife formwork 16 is installed at a predetermined position.

  Thereby, compared to the preparatory work such as suspending the prior placement fixing part embedded in the reinforcing bar or the like before the conventional prior concrete placement, the support member 25 is attached to the end form frame 16 with the bolts 17, It is only necessary to attach the flexible waterproofing member 20 to the support member 25, and preparation work can be performed easily and in a short time.

  After installing the preceding concrete casting form with the flexible waterproof joint 20 attached thereto, the preceding concrete is placed (see FIGS. 3 and 4).

  Then, after curing, the support member 25 is removed, and the wife mold 16 and other molds are removed, and as shown in FIG. 2 (b), instead of the wife mold 16 on the end surface 14a of the joint portion 14. A foam joint material 29 such as rubber or sponge is disposed and attached to the end face 14a of the joint portion 14 of the concrete structure 12 by attaching.

  The foam joint material 29 reduces deformation resistance and prevents damage when the flexible waterproof joint 20 is compressed.

  After that, after assembling the formwork necessary for the construction of the subsequent concrete structure 13, the subsequent concrete is placed. During the placement of the concrete after this, air may accumulate below the succeeding placement fixing portion 22 disposed at the upper portion, so that the previously formed air vent hole 26 is not blocked. Set up.

  Then, after curing, by removing the mold, the installation of the flexible waterproof joint 20 to the joint portion 14 is completed (see FIG. 2B).

    In addition, the waterproof sheet 28 is attached later to the entire circumference of the joint part 14, that is, the bottom part, the side face, and the top face, or the waterproof sheet 28 attached at the time of placing the concrete is joined to attach rainwater or the like. To prevent.

  After the connection of the joint portions 14 of the concrete structures 12 and 13 is completed by this waterproof sheet 28, when it is used as an underground structure, it is backfilled with earth and sand. Thus, it is possible to prevent a problem such as an external force being applied to the flexible waterproof joint 20.

  According to this flexible waterproof joint and its construction method, the foam supporting member 24 provided outside the flexible waterproof joint 20 can hold the shape and prevent the inflow of concrete. The deformation performance of the flexible waterproof joint 20 can be maintained by the compression deformability of the foam support member 24 itself.

  Further, the flexible waterproof joint 20 whose shape is held by the foam support member 24 is fixed to the end form frame 16 via the support member 25 with bolts 17 and concrete is placed, so that the outside of the foam support member 24 is removed. The surface can be made substantially flush with the outer surface of the joint part 14 of the concrete structures 12 and 13 to be constructed.

  Thereby, preparatory work, such as attachment before concrete placement of flexible waterproof joint 20, can be performed easily and in a short time.

  Further, according to the flexible waterproof joint 20, the leading and trailing placement fixing portions 21, 22 are provided with plate-like side seal portions 21a, 22a and anchor portions 21b protruding from the side seal portions 21a, 22a. 22b and the bulging portions 21c and 22c, the side seal portions 21a and 22a can stop the water on the outer surface side of the concrete structures 12 and 13, and at the same time, the anchor portion 21b by placing concrete. , 22b and the bulging portions 21c, 22c are embedded and fixed, and can be easily constructed without requiring a fixing operation.

  Furthermore, according to the flexible water-stop joint 20, the expansion / contraction part 23 has a hollow inverted trapezoidal cross-sectional shape, so that a sufficient expansion / contraction allowance can be secured and the displacement of the joint part 14 can be absorbed.

  Moreover, according to this flexible waterproof joint and its construction method, since the flexible waterproof joint 20 arranged at the upper part of the joint part 14 is provided with the air vent hole 26 for venting up and down, It is possible to discharge the air accumulated around the flexible waterproof joint 20 in this portion, and the concrete does not enter by the air, and the water stoppage is lowered by filling the concrete without gaps. Can be prevented.

  Furthermore, according to the construction method of the flexible waterproof joint, the mounting position of the flexible waterproof joint 20 can be adjusted via the position adjusting mechanisms 25a to 25g of the support member 25 attached to the end form frame 16. Moreover, the preparatory work before placing concrete can be facilitated, and the entire construction can be facilitated.

  Further, according to the construction method of the flexible waterproof joint, when the lower part of the concrete structures 12 and 13 is constructed, the waterproof sheet 28 is laid on the leveled concrete 15 and then the outer surface of the foam support member 24 is placed. Since it did in this way, attachment of the waterproof sheet 28 can also be performed easily also to the lower part of the concrete structures 12 and 13, and a water stop can be improved.

  Furthermore, according to the construction method of this flexible waterproof joint, the air vent hole 26 provided in the construction of the upper part of the concrete structures 12 and 13 is closed with the rubber sheet 27 after the construction and the waterproof sheet 28 is provided. As a result, it is possible to vent the air and at the same time ensure water-stopping.

  In addition, according to the construction method of this flexible waterproof joint, since the preceding concrete was placed, the foam concrete 29 was provided instead of the end form 16, and the subsequent concrete was placed. The following concrete can be struck immediately.

  Next, another embodiment in which the flexible waterproof joint according to the present invention and the construction method thereof are applied to an external waterproofing waterproof board will be described with reference to FIGS.

  As shown in FIG. 6 (a), in the flexible water-stopping joint 30 constituted by this outer waterproof type water-stopping plate, as shown in FIG. A subsequent casting fixing portion 32 embedded and fixed by driving, a substantially inverted U-shaped expansion / contraction portion 33 disposed between them, a preceding casting fixing portion 31, a subsequent casting fixing portion 32, and And a foam support member 34 made of a foam material that is attached to the outside of the stretchable portion 33 and maintains its shape.

  In this flexible water-stopping joint 30, the preceding placement fixing portion 31 and the subsequent placement fixing portion 32 have the same shape, and the outer periphery of the joint portion 14 of the preceding and succeeding concrete structures 12, 13 is V-shaped. Side seal portions 31a and 32a having bent tip portions applied to the inclined surfaces 12a and 13a, and outer surfaces are substantially perpendicular to the side seal portions 31a and 32a, and are substantially perpendicular to the inclined surfaces 12a and 13a. Are provided with plate-like anchor portions 31b and 32b that are substantially linear with each other, and are provided with bulging portions 31c and 32c that bulge outward on both ends at the tips of the respective plate-like anchor portions 31b and 32b.

  An expansion / contraction portion 33 having a substantially inverted U-shaped cross-section is disposed between the preceding placement fixing portion 31 and the subsequent placement fixing portion 32, and the preceding placement fixing portion 31 and the following configuration are arranged at the opening end. The inner end portions of the placement fixing portion 32 are connected to each other and formed integrally.

  Further, in this flexible waterproof joint 30, butyl sheets 31d and 32d are attached to the concrete structures 12 and 13 side of the side seal portions 31a and 32a of the preceding casting fixing portion 31 and the trailing casting fixing portion 32, respectively. In addition, it is possible to ensure waterproofness between concrete.

The foam support member 34 attached to the outside of the flexible waterproof joint 30 so that the shape can be maintained by adhesion or partial adhesion is made of a foam material such as sponge rubber or polystyrene foam, and is rigid and flexible. The thickness is such that the shape of the water-stopping joint 30 can be maintained, and the inner surface is an outer surface of the flexible water-stopping joint 30. The shape is substantially matched with the outer surface, and the outer surface is flush with the outer surfaces of the concrete structures 12 and 13.

  Here, the space 34a having a substantially cross-sectional shape in the space between the side seal portions 31a, 32a and the stretchable portion 33 has a thickness corresponding to the inverted U-shaped arc portion of the stretchable portion 33 on the outer side. The divided thin plate-like member 34b is configured such that a continuous thick plate-like member 34c is disposed on the outer side thereof so as to straddle the preceding placing fixing portion 31 and the subsequent placing fixing portion 32, When the concrete structure is completed, irregularities are not formed.

  The foam support member 34 is not limited to a split structure, and may be an integral structure. Similarly to the foam support member 24, the preceding placement fixing portion 31 and the subsequent placement of the flexible waterproof joint 30. Adhesion between the fixing part 32 and the expansion / contraction part 33 between them is not limited as long as the shape can be maintained at the time of construction, and there is no problem even if it is separated without being bonded after the operation. But it ’s okay.

  Next, a construction method for the joint portion 14 of the concrete structure 12, 13 of the flexible waterproof joint 30 configured as described above will be described with reference to FIG. 6 and FIG. The same symbols are given, and duplicate descriptions are omitted.

  The construction of the flexible water-stopping joint 30 is carried out using the support member 25 in substantially the same manner as the flexible water-stopping joint 20 already described. The support plate portion 25e ′ of the member 25 is formed in a plate shape that supports the plate-like anchor portion 32b on the trailing side.

  The construction of the flexible waterproof joint 30 performed using the support member 25 including the support plate portion 25e ′ is performed in the same manner as the flexible waterproof joint 20 described above, and the end surface 14a of the joint portion 14 is performed. After fixing the fixing plate portion 25a of the supporting member 25 to the outer end surface of the end form frame 16 forming the bolt with the bolt 17, the position of the flexible waterproof joint 30 supported by the supporting plate portion 25e 'is projected from the adjusting bolt 25g. Adjustment is made by changing the amount, adjustment is made to a predetermined position, and the fixing bolt 25d is tightened and fixed.

  In this case, in the upper part of the joint part 14 of the concrete structures 12 and 13, as shown in FIG. 6B, the outer side of the flexible waterproof joint 30 disposed in this part is waterproofed after the concrete is placed and cured. Cover with sheet 28.

Further, as shown in FIG. 7 (a) at the side of the joint part 14 of the concrete structures 12 and 13, and at the lower part of the joint part 14, as shown in FIG. The attachment of the support member 25 to the wife mold 16 and the flexible waterproof joint 30 may be performed at the site where the wife mold 16 is not installed. It is good to carry out by moving the place with a large space or the wife formwork 16 to an easy work position on the installation site, and after installing the flexible waterproof joint 30, install the wife formwork 16 in a predetermined position. Like that.

  Thereby, compared to the preparatory work such as suspending the prior placement fixing part embedded in the reinforcing bar or the like before the conventional prior concrete placement, the support member 25 is attached to the end form frame 16 with the bolts 17, It is only necessary to attach the flexible water blocking member 30 to the support plate portion 25e ′ of the support member 25, and preparation work can be performed easily and in a short time.

  After installing the preceding concrete casting form with the flexible waterproof joint 20 attached in this way, placing the preceding concrete and curing, after removing the support member 25, the wife form 16 and other formwork 6A, a foam joint material 35 such as rubber or sponge is disposed in place of the end form frame 16 on the end face 14a of the joint portion 14 as shown in FIG. 6A, and the joint portion 14 of the concrete structure 12 is disposed. It adheres and attaches to the end surface 14a of this, The reduction | decrease of the deformation resistance at the time of compressive deformation of the flexible waterproof joint 30 and a damage prevention are aimed at.

  After that, after assembling the formwork necessary for the construction of the subsequent concrete structure 13, the subsequent concrete is cast, and after curing, the formwork is removed to prevent the joint portion 14 from being flexibly fixed. Installation of the water joint 30 is completed (see FIG. 6A).

  In addition, the waterproof sheet 28 is attached later to the entire circumference of the joint part 14, that is, the bottom part, the side face, and the top face, or the waterproof sheet 28 attached at the time of placing the concrete is joined to attach rainwater or the like. To prevent.

  After the connection of the joint portions 14 of the concrete structures 12 and 13 is completed by this waterproof sheet 28, when it is used as an underground structure, it is backfilled with earth and sand. Thus, it is possible to prevent a problem such as an external force being applied to the flexible waterproof joint 30.

  According to this flexible waterproof joint and its construction method, the foam support member 34 provided outside the flexible waterproof joint 30 can hold the shape and prevent the inflow of concrete. The deformation performance of the flexible waterproof joint 30 can be maintained by the compression deformability of the foam support member 34 itself.

  Further, the flexible waterproof joint 30 whose shape is held by the foam support member 34 is fixed to the end form frame 16 via the support member 25 with bolts 17 and concrete is placed, so that the outside of the foam support member 34 is removed. The surface can be made substantially flush with the outer surface of the joint part 14 of the concrete structures 12 and 13 to be constructed.

  Thereby, preparatory work, such as attachment before the concrete placement of the flexible waterproof joint 30, can be performed easily and in a short time.

  Further, according to the flexible water-stop joint 30, since the expansion / contraction part 33 has an inverted U-shaped cross-sectional shape, a sufficient expansion / contraction allowance can be secured and the displacement of the joint part 14 can be absorbed. The same effects as the flexible waterproof joint 20 and its construction method described are exhibited.

Next, another embodiment of the flexible waterproof joint according to the present invention will be described with reference to FIG.
A flexible waterproof joint 30A shown in FIG. 8A is different from the flexible waterproof joint 30 in that the front end bent portions of the side seal portions 31a and 32a are omitted, and the tip is sharpened like a wedge.

  In addition, the other structure is the same as the flexible waterproof joint 30 already demonstrated, and construction can also be performed by the same method.

  Even with the flexible waterproof joint 30A configured in this manner, the foam support member 34 provided on the outside of the flexible waterproof joint 30A can keep the shape and prevent the inflow of concrete. The deformation performance of the flexible waterproof joint 30A can be maintained by the compressive deformability of the foam support member 34 itself, and the same operational effects as the flexible waterproof joint 30 described above can be obtained.

Next, the flexible waterproof joint 40 shown in FIG.8 (b) is demonstrated.
In this flexible waterproof joint 40, instead of the hollow inverted trapezoidal stretchable part 23 of the flexible waterproof joint 20 already described, the inverted U-shaped stretchable part 33 of the flexible waterproof joints 30 and 30A is combined. The stretchable portion 43 having a substantially W-shaped cross section is continuously formed between the preceding placement fixing portion 41 and the subsequent placement fixing portion 42 in an integrated shape.

  In this flexible waterproof joint 40, as the foam support member 44, a thin plate-like member 44a having a rectangular cross section is provided in each of two W-shaped valleys, and the side seal portions 41a and 42a are continuously extended to the outside. The thick plate-shaped members 44b having a rectangular cross section are arranged and attached by full adhesion or partial adhesion so that the shape of the flexible waterproof joint 40 can be maintained.

  The other structures such as the anchor portions 41b and 42b, the bulging portions 41c and 42c, and the butyl sheets 41d and 42d are the same as those of the flexible waterproof joints 20, 30, and 30A already described, and the construction is also the same method. Can be done.

  The flexible waterproof joint 40 configured as described above can also hold the shape with the foam support member 44 provided outside the flexible waterproof joint 40 and can prevent the inflow of concrete. In addition to being able to maintain the deformation performance of the flexible waterproof joint 40 by the compressive deformability of the foam support member 44 itself, the same effects as the flexible waterproof joints 20, 30, and 30A described above are exhibited. .

It is a schematic perspective view of the concrete structure in which the flexible water-stopping joint concerning one Embodiment of this invention is provided. 1 is a partial cross-sectional view of a flexible water-stopping joint according to an embodiment of the present invention, and FIG. FIG. It concerns on one Embodiment of the construction method of the flexible waterproof joint of this invention, (a) is a cross-sectional view of the upper construction state, (b) is an A arrow directional view in (a). It is a cross-sectional view of the construction state of each side part and the lower part concerning one Embodiment of the construction method of the flexible waterproof joint of this invention. It is a schematic explanatory drawing of a supporting member provided with the position adjustment mechanism concerning one Embodiment of the flexible water-stop joint of this invention. It relates to another embodiment of the flexible waterproof joint of the present invention, (a) is a partial cross-sectional view of the flexible waterproof joint, (b) is a cross-sectional view of the construction state of the upper portion of the flexible waterproof joint FIG. It is a cross-sectional view of the construction state of each side part and the lower part concerning other one Embodiment of the construction method of the flexible waterproof joint of this invention. It concerns on one Embodiment of the flexible water-stopping joint of this invention, (a) The partial cross-sectional view concerning other embodiment, (b) is the partial cross-sectional view concerning other embodiment. It is explanatory drawing of the cross-sectional view of the conventional water stop board, and its construction method. It is a front view of the conventional flexible waterproof joint, and explanatory drawing of the construction method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 12 Concrete structure 12a Inclined surface 13 Concrete structure 13a Inclined surface 14 Joint part 14a End surface 15 Averaged concrete 16 Bolt formwork 17 Bolt 18 Presser plate 19 Formwork 20 Flexible water-stopping joint 21 Preliminary placement fixing part 21a Side seal Part 21b anchor part 21c bulging part 21d butyl sheet 22 subsequent casting fixing part 22a side seal part 22b anchor part 22c bulging part 22d butyl sheet 23 expansion and contraction part 24 foaming support member 25 support member 25a fixing plate part 25b parallel fixing plate 25c Adjustment plate 25d Fixing bolt 25e Support plate part 25f Bracket 25g Adjustment bolt 26 Air vent hole 27 Rubber sheet 28 Waterproof sheet 29 Foam joint material 30 Flexible waterproof joint 31 Preliminary driving fixing part 32 Subsequent driving fixing part 33 Stretchable part 34 Foam support member 35 Foam joint material 30A Flexible waterproof joint 40 Flexible waterproof joint 41 Preliminary placement fixing portion 42 Subsequent placement fixing portion 43 Stretchable portion 44 Foaming support member

Claims (10)

A flexible waterproof joint that is provided in a joint part of a concrete structure constructed by passing over preceding and succeeding concrete and that allows internal and external waterproofing and relative displacement of the joint part,
A preceding placement fixing portion and a following placement fixing portion which are embedded and fixed to the preceding and following concrete structures by placement;
An expansion / contraction part that is provided between the preceding casting fixing part and the subsequent casting fixing part and allows water stop and relative displacement,
Provided on the outer side of the preceding casting fixing part, the trailing casting fixing part, and the expansion / contraction part, and the inner surface is attached so as to substantially match the outer surface of the flexible waterproof joint, and the outer surface is attached. A foam support member formed of a foam material that is substantially flush with the outer surface of the concrete structure;
A flexible waterproof joint, comprising:   The flexible waterstop according to claim 1, wherein the leading and trailing placement fixing portions are configured to include a plate-like side surface seal portion and an anchor portion protruding from the side surface seal portion. Fittings.   3. The flexible waterproof joint according to claim 2, wherein the side seal portion is formed at an angle corresponding to a joint slope formed facing the joint portion. 4. The flexible waterproof joint according to any one of claims 1 to 3, wherein the expansion / contraction part is formed of any one of a cross-sectional shape of a hollow inverted trapezoidal shape, a W shape, and an inverted U shape. . The flexible stopper according to any one of claims 1 to 4, wherein the flexible waterproof joint disposed at an upper part of the joint part is provided with a through hole for venting air vertically. Water fittings. When constructing a flexible water-stopping joint that is provided in a joint part of a concrete structure constructed by passing over preceding and succeeding concrete and that allows internal and external water-stopping and relative displacement of the joint part,
After supporting the flexible waterproof joint, which is held by the foam support member made of foam material, via the support member, the previous concrete is placed in the end form for casting the concrete structure. The leading placement fixing portion is buried and fixed, and then the supporting member is removed and the subsequent concrete is placed and the trailing placement fixing portion is buried and fixed. Water fitting construction method.   The flexible waterproof joint according to claim 6, wherein a position adjusting mechanism is provided on the support member to adjust a support position of the flexible waterproof joint and to place the preceding concrete. Construction method.   The flexible stopper according to claim 6 or 7, wherein when the lower part of the concrete structure is constructed, a waterproof sheet is laid on the leveled concrete, and then the outer surface of the foam support member is placed. Water fitting construction method.   When constructing the upper part of the concrete structure, after providing concrete with a through hole for venting the top and bottom of the flexible waterproof joint, the through hole was closed and a waterproof sheet was provided. The construction method of the flexible waterproof joint in any one of Claims 6-8 characterized by these. 10. The method according to any one of claims 6 to 9, wherein after the preceding concrete is placed, a foam joint material is provided in place of the end form to place the subsequent concrete. Construction method of stiff water joint.

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