Joint structure for building frame and concrete pouring method using the same

Abstract

The present invention provides a structural joint structure and a concrete pouring method using the same, which can significantly shorten the construction period for structural structures with joints. [Solution] In the partitioned areas 11 and 12 separated by the joint 1, the upper and lower joint materials 21 and 22 are supported from both partitioned areas 11 and 12 by three upper, central, and lower abutments 41, 42, 43 attached vertically to the one-side and the other-side support members 31 and 32, so that the tips of the upper and lower joint materials 21 and 22 are brought into contact with each other from both partitioned areas 11 and 12. Meanwhile, the water stop plate 23 is held in place by the central and lower abutments 42 and 43, which face each other vertically, in contact with each other from both above and below. In this state, the one-side and the other-side support members 31 and 32 are fixed to the reinforcing bars 17 and couplers 16 of the respective partitioned areas 11 and 12. Then, concrete is poured into both partitioned areas 11 and 12 simultaneously.

Description

Technical Field

[0001] The present invention relates to a joint structure of a body and a concrete placing method using the same, and particularly to a technique effective for shortening the construction period of a body structure having joints.

Background Art

[0002] Generally, in a concrete body continuous in the longitudinal direction, joints are provided at every predetermined length (for example, about 3000 mm to 5000 mm), and the body is constructed in a shape where a plurality of compartment areas are connected via the joints. These joints are provided to prevent cracks caused by shrinkage of concrete or the like from occurring in the body, and a joint material made of a rubber foam or the like is arranged between the abutting surfaces of the concrete in adjacent compartment areas. Further, a water stop plate is horizontally provided in a state orthogonal to the joint material so as to be installed in the concrete of both adjacent compartment areas, and this water stop plate is embedded so as to straddle both compartment areas.

[0003] By the way, in a large body such as a box culvert constructed by connecting precast concrete structures, if the precast concrete structure itself is large, it may be transported to the construction site after being divided into a plurality of parts in consideration of the weight and shape of the structure. Then, at the construction site, each part is combined to create a precast concrete structure, and this structure is arranged in order in the longitudinal direction to construct a long body.

[0004] At this time, when constructing a long body such as a box culvert, if the structure formed by combining the divided parts is formed in a portal shape, it is necessary to form the missing bottom plate part by cast-in-place concrete. Since this missing part (bottom plate part) is continuous in the longitudinal direction of the body, even for the concrete placed in the missing part continuous in the longitudinal direction of the body, it is necessary to provide joints at every predetermined length, and the continuous missing part of the body is constructed in a shape where a plurality of compartment areas are connected via the joints.

[0005] In this case, in the case of adjacent partitioned areas among multiple partitioned areas, the reinforcing bars that would normally be embedded in both partitioned areas are placed in only one of the partitioned areas. Formwork is then set up in the partitioned area where the reinforcing bars are laid, and a water-stopping plate holder attached to this formwork, spanning both partitioned areas, is used as a splint to fix the water-stopping plate without bending it (see Patent Document 1). Then, concrete is poured into the partitioned area where the reinforcing bars are laid and separated by the formwork. After the concrete has cured, the formwork is removed and joint material is placed. In this way, after concrete has been poured into one partitioned area, the remaining partitioned area is similarly subjected to the laying of reinforcing bars and the pouring of concrete. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2013-256816 [Overview of the project] [Problems that the invention aims to solve]

[0007] However, when constructing one of two adjacent compartments using formwork, it is not possible to lay reinforcement in the other compartment where the formwork is located. Therefore, in adjacent compartments, concrete must be cured in one compartment before concrete is poured in the other. As a result, the curing period for the concrete poured in each compartment is at least twice as long, which significantly increases the construction time for the main structure.

[0008] The present invention has been made in view of the above, and its objective is to provide a joint structure for a structural frame and a concrete pouring method using the same that can significantly shorten the construction period for constructing a structural frame having joints. [Means for solving the problem]

[0009] To achieve the above objective, the present invention is based on a joint structure of a frame in which multiple partitioned areas, each to which concrete is poured, are connected via joints. Furthermore, the present invention includes a one-side and other-side joint material, which is placed between the concrete butting surfaces of two adjacent partitioned areas and is divided into two sections, one side and the other side, where watertightness is required; a water-stopping plate, which extends in the longitudinal direction to close the gap between the one-side and other-side joint materials and is embedded in the two partitioned areas with its short direction spanning; a one-side support member, which is fixed to a reinforcing bar provided in one of the two partitioned areas and supports the one-side and other-side joint materials from the side of the one partitioned area, and the other of the two partitioned areas The system includes: a support member fixed to reinforcing bars provided in a partitioned area, which supports the one-side and other-side joint materials from the other partitioned area side, respectively; and a contact device attached in multiple quantities to the one-side and other-side support members in the partitioning direction of the one-side and other-side joint materials, which abuts the one-side and other-side joint materials with their tips facing each other from the one-side and other-side partitioned area side, while clamping the water-stopping plate with opposing surfaces facing each other in the partitioning direction of the one-side and other-side joint materials abutting each other from the thickness direction of the water-stopping plate. Furthermore, when concrete is poured into both partitioned areas, the joint materials on one side and the other side are held in place by the contact of the tips of the abutting fittings attached to the one-side support member and the other-side support member, respectively, while the water-stopping plate is sandwiched from the thickness direction by the contact of the opposing surfaces of the abutting fittings, and the joint materials on one side and the other side and the water-stopping plate are placed on the abutting surfaces of the concrete in both partitioned areas.

[0010] Furthermore, the one-sided and other-sided support members are provided with a straight piece extending substantially straight in the partitioning direction of the one-sided and other-sided joint materials so as to face each other with the one-sided and other-sided joint materials in between, and a one-sided detachment piece and an other-sided detachment piece extending substantially parallel to each other in directions away from the one-sided and other-sided joint materials, respectively, from both ends of the straight piece. At least one of the one-sided and other-sided detachment pieces may be fixed to the reinforcing bars of the one-sided partitioning area and the other-sided partitioning area via fasteners.

[0011] Furthermore, it is preferable to attach at least three of the aforementioned abutments to the straight pieces of the one-sided and other-sided support members in the direction of the division of the one-sided and other-sided joint materials.

[0012] Furthermore, multiple support members on one side and the other side may be provided at intervals along the longitudinal direction of the water-stopping plate.

[0013] As the aforementioned joint material for one side and the other side, a material that divides the area into two sections, upper and lower, where watertightness is required, may be applied, and the lower end of one of the lower sections may be fixed to the installation surface with an angle member.

[0014] In contrast, to achieve the above objective, the present invention is based on a concrete pouring method using a joint structure of a frame in which multiple partitioned areas to which concrete is poured are connected via joints. Furthermore, the present invention comprises a one-side and other-side joint material, which is placed between the butt surfaces of concrete in two adjacent partitioned areas and is divided into two sections, one side and the other side, where watertightness is required, and a water-stopping plate, which extends in the longitudinal direction to close the gap between the one-side joint material and the other-side joint material and is embedded in the two partitioned areas so as to span the short direction.

[0015] Then, the tips of the abutments, which are attached in multiple locations in the partitioning direction of the one-sided and other-sided joint materials to the one-sided support member that supports the one-sided and other-sided joint materials from the one partitioned area side and the other-sided support member that supports the one-sided and other-sided joint materials from the other partitioned area side, are brought into contact with the one-sided and other-sided joint materials with each other facing each other from the one-sided and other-sided partitioned area sides. Meanwhile, the water-stopping plate is held in place with the opposing surfaces of the one-sided and other-sided joint materials that face each other in the partitioning direction, in contact with each other from the thickness direction of the water-stopping plate. In this state, the one-sided support member is fixed to the reinforcing bars laid in the one partitioned area, and the other-sided support member is fixed to the reinforcing bars laid in the other partitioned area. Then, concrete is poured into both partitioned areas, and the joint materials on one side and the other side are held in place by the contact of the tips of the contact fittings of the one-side support member and the other-side support member, while the water-stopping plate is sandwiched from the thickness direction by the contact of the opposing surfaces of the contact fittings, and the joint materials on one side and the other side, as well as the water-stopping plate, are placed on the abutting surfaces of the concrete in both partitioned areas. [Effects of the Invention]

[0016] In short, in each section area connected by a joint, the joint material on one side and the joint material on the other side are supported from one side and the other side of the section area, respectively. Multiple abutments are attached to the one side and the other side of the joint material in the section direction, so that the tips of the one side and the other side of the joint material are in contact with each other from one side and the other side of the section area, respectively. At the same time, the water stop plate is held in place with the opposing surfaces of the one side and the other side of the joint material in the section direction in contact with each other from the thickness direction of the water stop plate. In this state, the one side and the other side of the support members are fixed to the reinforcing bars of each section area, and then concrete is poured into both section areas.

[0017] This makes it possible to pour concrete simultaneously in adjacent sections without using formwork to separate them, allowing the concrete curing period in each section to be completed simultaneously with a single concrete pouring operation, and significantly shortening the construction period for structural elements with joints.

[0018] Furthermore, the water-stopping plate is held between both compartment areas by the contact of the tips of each contact device, which holds the joint material on one side and the other side facing each other, in contact with each other from the thickness direction of the water-stopping plate. This makes it possible to hold the water-stopping plate using each contact device that holds the joint material on one side and the other side by the contact of their tips, eliminating the need to use a separate holder for holding the water-stopping plate, and thus reducing the cost by reducing the number of parts.

[0019] Furthermore, the one-sided support member and the other-sided support member are provided with a straight piece that extends substantially straight in the partitioning direction of the two joint materials so as to face each other with the one-sided and other-sided joint materials in between, and a one-sided detachment piece and a other-sided detachment piece that extend substantially parallel to one side and the other side of the straight piece in directions away from the two joint materials, respectively, and at least one of the one-sided and other-sided detachment pieces is fixed to the reinforcing bars of the partitioning areas of the one-sided and other-sided sections via fasteners, respectively.

[0020] This allows the support members on one side and the other side to be firmly fixed to the reinforcing bars in both partitioned areas. Furthermore, the joint materials are securely held by the contact of the tips of each abutment device attached to the straight piece in the partitioning direction of both joint materials, while the water stop plate is securely held by the opposing surfaces of the upper and lower abutments facing each other, which are clamped from both sides in the thickness direction.

[0021] Further, by attaching at least three or more contact members to the straight pieces of the one-side support member and the other-side support member in the partitioning direction of the two joint materials, it is also possible to make the tip of at least one of the one-side and the other-side joint materials abut against and be held by another contact member of the two contact members sandwiching the water stop plate between their opposing surfaces, and the holding of the one-side and the other-side joint materials and the water stop plate can be smoothly performed.

[0022] Also, by providing a plurality of one-side support members and the other-side support members at intervals in the left-right direction (the short side direction of the structure) of the joint, the upper and lower joint materials and the water stop plate can be reliably held by the upper and lower contact members by the plurality of one-side support members and the other-side support members individually fixed to the reinforcing bars at positions spaced apart in the left-right direction of the joint.

[0023] Furthermore, when applying the one-side and the other-side joint materials partitioned into two on the upper side and the lower side where water tightness is required, by fixing the lower end of one of the joint materials located on the lower side of the one-side and the other-side joint materials to the installation surface by an angle member, in combination with the abutment of the tip of the contact member against one of the joint materials from the one and the other partition region sides, both ends in the partitioning direction of the one joint material can be more reliably held.

Brief Description of the Drawings

[0024] [Figure 1] It is a front view seen from one side in the longitudinal direction of a structure formed by connecting structures made of precast concrete using the joint structure according to the first embodiment of the present invention. [Figure 2] It is a plan view seen from above before placing concrete in the continuous defective part of the structure in a state where the upper part of the precast concrete structure of FIG. 1 is removed. [Figure 3] It is a perspective view seen from obliquely above of the continuous defective part of the structure of FIG. 2. [Figure 4] It is a plan view seen from above near the joint of the continuous defective part of the structure of FIG. 3. [Figure 5] It is a front view seen from one side in the longitudinal direction of the continuous defective part of the structure of FIG. 4. [Figure 6]This is a cross-sectional view taken along line AA in Figure 5. [Figure 7] Figure 4 is a perspective view of the continuous missing sections of the building structure, seen from diagonally above. [Figure 8] Figure 1 shows a side view of the one-sided support member and the other-sided support member used in the joint structure, as seen from the short side of the building frame. [Figure 9] Figure 8 is a front view of the one-sided support member as seen from one side in the longitudinal direction of the building structure. [Figure 10] Figure 9 is a rear view of the one-sided support member as seen from the other side in the longitudinal direction of the building structure. [Figure 11] This is a plan view of the one-sided support member shown in Figure 9, as seen from above the building structure. [Figure 12] This is a bottom view of the one-sided support member shown in Figure 9, viewed from below the structure. [Figure 13] Figure 9 is a perspective view of one of the support members, seen from diagonally above the building structure. [Figure 14] This is a front view showing the state in which three abutments are attached to the straight piece of the one-sided support member in Figure 9. [Figure 15] This is a plan view of the one-sided support member shown in Figure 14, as seen from above the building structure. [Figure 16] Figure 14 is a perspective view of one of the support members on one side, seen from diagonally above the building structure. [Figure 17] This is a plan view from above the building structure, showing the fastener attached to the contact fitting in Figure 14. [Figure 18] Figure 8 is an explanatory diagram showing, from the short-side direction of the building structure, the state in which the joint material on one side and the water-stopping plate on the other side are held by the three abutments attached to the one-side support member and the other-side support member. [Figure 19] Figure 18 is an explanatory diagram showing, from diagonally above the structure, the state in which the joint material on one side and the water-stopping plate on the other side are held by the respective contact fittings of the one-side support member. [Figure 20] This is a partially cutaway perspective view showing a retaining wall, which is constructed using the joint structure according to the second embodiment of the present invention, with a portion of the concrete cut out. [Figure 21]Figure 20 is a longitudinal cross-sectional view of the retaining wall's base slab, as seen from one side in the shorter direction, with the reinforcing bars assembled. [Figure 22] This is a cross-sectional plan view of the base slab shown in Figure 21, with the reinforcing bars assembled, as seen from above. [Figure 23] Figure 20 is an enlarged perspective view of the two abutments attached to the one-sided and the other-sided support members used in the joint structure of the building frame. [Figure 24] Figure 23 is an exploded perspective view showing the two contacts removed from one and the other support members. [Figure 25] Figure 20 is a longitudinal cross-sectional rear view of the retaining wall, showing the vertical wall reinforcement bars assembled, as seen from the other side in the longitudinal direction. [Figure 26] Figure 25 is a longitudinal cross-sectional view of the vertical wall with the reinforcing bars assembled, seen from one side in the shorter direction. [Figure 27] This is an explanatory diagram showing, from above the vertical wall, the state in which the joint structure of Figure 20 is held in place by two abutments attached to the one-sided support member and the other-sided support member, as well as the joint material on one side and the water-stopping plate. [Figure 28] Figure 25 is a longitudinal cross-sectional rear view of the retaining wall, as seen from the other side in the longitudinal direction, with concrete poured into the vertical wall. [Figure 29] Figure 28 is a longitudinal cross-sectional rear view of the retaining wall, taken from the other side in the longitudinal direction, after the concrete poured into the vertical wall has completed curing. [Modes for carrying out the invention]

[0025] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0026] Figure 1 shows a front view of a structure constructed by connecting precast concrete structures using the joint structure according to the first embodiment of the present invention, viewed from one side in the longitudinal direction.

[0027] As shown in Figure 1, the structure X1 is a passageway-like box culvert constructed by connecting multiple precast concrete structures B, B, ... Each structure B is divided into three parts, taking into consideration the weight and shape during transport: an upper part B1 that is roughly U-shaped and located at the top, and an upper left part B2 and a lower right part B3 that are roughly L-shaped and each has an upper end surface that supports the left and right lower end surfaces of the upper part B1 from below. These three parts B1 to B3 are combined to form a portal-like structure.

[0028] Each structural unit B has a length in the longitudinal direction of the main body X1 (length in the front-to-back direction in Figure 1) set to approximately 1000 mm, a length in the left-to-right direction (short-to-right direction of the main body X1) set to approximately 4600 mm, and a height in the vertical direction set to approximately 6000 mm. In this case, the upper part B1, the lower left part B2, and the lower right part B3 are transported separately to the construction site of the main body X1, and at the construction site, the three parts B1 to B3 are combined to form structural units B, B, ... which are then sequentially connected on the installation surface S to construct the main body X1.

[0029] Furthermore, the bottom plate portion located in the center of the bottom of each structure B is the missing portion B4 located between the lower ends of the lower left portion B2 and the lower right portion B3 when the lower left portion B2 and the lower right portion B3 support the lower left and right lower ends of the upper portion B1 from below. At the bottom of each structure B, the lower left portion B2 and the lower right portion B3 are separated by the missing portion B4. Each structure B that is continuous in the longitudinal direction of the building body X1 is connected via a sealing material 10 (joint material) so that the missing portion B4 between the lower left portion B2 and the lower right portion B3 is continuous in the longitudinal direction of the building body X1. In this case, the length of the missing portion B4 of each structure B is set to approximately 1500 mm in the left-right direction, and recesses B5 extending in the longitudinal direction of the structure X1 are provided on the opposing surfaces of the lower left portion B2 and the lower right portion B3, respectively, so as to prevent the concrete C poured into the missing portion B4 from detaching.

[0030] The continuous missing sections B4 of the structural body X1 are formed by the continuous missing sections B4 of each structural body B in the longitudinal direction, and the structural body X1 is constructed by pouring concrete C. In this case, the concrete C poured into the continuous missing sections B4 of the structural body X1 needs to have joints 1 at predetermined lengths (for example, about 3000 mm), and each joint 1 will be used to construct a shape in which adjacent compartmental areas 11 and 12 are alternately connected to each other.

[0031] Joint 1 is equipped with a joint material 2 to prevent cracks from occurring in the structure X1 due to shrinkage of concrete C, etc. This joint material 2 is installed at each sealant 10 corresponding to the position where the three structures B, B, B are connected, since the length of each structure B (the length in the longitudinal direction of the structure X1) is set to approximately 1000 mm, and is spaced approximately 3000 mm apart in the longitudinal direction of the structure X1. Furthermore, joint 1 is equipped with a water-stopping plate 23 that is installed and incorporated into the concrete C, C of adjacent compartment areas 11, 12, and the water-stopping plate 23 is embedded so as to span both adjacent compartment areas 11, 12.

[0032] Figure 2 is a plan view from above, with the upper part B1 of the precast concrete structure B in Figure 1 removed, before concrete C is poured into the continuous missing section B4 of the structure X1. Figure 3 is a perspective view of the continuous missing section B4 of the structure X1 in Figure 2, viewed from diagonally above. Figure 4 is a plan view from above, near joint 1 of the continuous missing section B4 of the structure X1 in Figure 3. Figure 5 is a front view of the continuous missing section B4 of the structure X1 in Figure 4, viewed from one side in the longitudinal direction. Furthermore, Figure 6 is a cross-sectional view taken along line AA in Figure 5, and Figure 7 is a perspective view of the continuous missing section B4 of the structure X1 in Figure 4, viewed from diagonally above.

[0033] As shown in Figures 2 to 7, the joint material 2 is divided into two sections in the vertical direction where watertightness is required to block the intrusion of groundwater from the lower side (other side) to the upper side (one side), and comprises an upper joint material 21 as the joint material for one side and a lower joint material 22 as the joint material for the other side. The upper joint material 21 and the lower joint material 22 are placed between the abutting surfaces of the concrete C, C in the two adjacent sectioned areas 11 and 12. The upper joint material 21 and the lower joint material 22 are made of resin-based foam or asphalt-based panel-shaped members, and are required to have a thickness that can absorb the expansion and contraction of the concrete C, C poured in the two adjacent sectioned areas 11 and 12, respectively.

[0034] The water-stopping plate 23 is formed into a panel shape from a flexible material such as rubber or polyvinyl chloride, and is sandwiched between the joint materials 21 and 22 on both the upper and lower sides to block water from seeping in from the lower to the upper side at the joint 1 of the defective area B4. The water-stopping plate 23 is also embedded horizontally and positioned approximately horizontally, spanning both concrete C and C of the two adjacent compartment areas 11 and 12. In this case, the joint materials 21 and 22 on both the upper and lower sides are divided vertically by the water-stopping plate 23.

[0035] In each section area 11, 12, 11, 12, ... upper and lower lead bars 14 and 15 are led out from two locations, upper and lower, at the lower ends of the lower left section B2 and lower right section B3 of structure B, respectively, so as to face each other towards the missing section B4. Upper and lower lead bars 17, 17, ... extending in the left-right direction are connected to these mutually facing upper and lower lead bars 14, 15, ... via couplers 16.

[0036] In one of the two adjacent compartment regions 11 and 12, four side-support members 31, 31, ... are provided at intervals in the left-right direction within the compartment region 11. Each of these side-support members 31 is fixed to a reinforcing bar 17 extending in the left-right direction on the side of one compartment region 11 of the continuous defect B4 of the structure X1 where the joint material 2 is installed. In the other compartment region 12, four other-side support members 32, 32, ... are provided at intervals in the left-right direction within the compartment region 12 of the defect B4 of the structure X1 where the joint material 2 is installed on the other compartment region 12.

[0037] Figure 8 shows a side view of the one-sided support member 31 and the other-sided support member 32 used in the joint structure of Figure 1, viewed from the short side of the structure X1, and Figure 9 shows a front view of the one-sided support member 31 of Figure 8, viewed from one side in the longitudinal direction of the structure X1. Furthermore, Figure 10 shows a rear view of the one-sided support member 31 of Figure 9, viewed from the other side in the longitudinal direction of the structure X1, and Figure 11 shows a top view of the one-sided support member 31 of Figure 9, viewed from above the structure X1. In addition, Figure 12 shows a bottom view of the one-sided support member 31 of Figure 9, viewed from below the structure X1, and Figure 13 shows a perspective view of the one-sided support member 31 of Figure 9, viewed from diagonally above the structure X1.

[0038] As shown in Figures 8 to 13, each one-sided support member 31 and each other-sided support member 32 are formed by bending reinforcing bars into a roughly U-shape and are provided with a vertical piece 33 as a straight piece that extends roughly vertically in the vertical direction, which is the partitioning direction of the upper and lower joint materials 21 and 22, so as to face each other with the upper and lower joint materials 21 and 22 in between, and an upper end piece 34 (one-sided separation piece) and a lower end piece 35 (other-sided separation piece) that are bent at approximately 90° from both the upper and lower ends of the vertical piece 33 and extend roughly horizontally in the front-rear direction, roughly parallel to each other, and away from both joint materials 21 and 22, respectively. In addition, a long, slender flat plate material 36 is fixed to the lower end piece 35, extending in the front-rear direction along the lower end piece 35.

[0039] The lower end piece 35 of the upper end piece 34 and lower end piece 35 of each one-side support member 31 and each other-side support member 32 is fastened at two points on the front and rear of the flat plate member 36 to the couplers 16 of the reinforcing bars 17 and lower lead-out reinforcing bars 15 on one and the other partitioned areas 11 and 12 sides of the missing portion B4 of the structure X1 where the joint material 2 is installed, using U-bolts 18 and nuts 19 as fasteners. In addition, the upper end piece 34 of each one-side support member 31 and each other-side support member 32 is fastened at multiple points in the front and rear direction to the reinforcing bars 17 and couplers 16 on the one and the other partitioned areas 11 and 12 sides, using binding wire (not shown) as fasteners. Note that each one-side support member 31 and each other-side support member 32 have the same configuration, so only each one-side support member 31 is shown in the following figures.

[0040] Figure 14 is a front view showing the state in which three abutments are attached to the vertical piece 33 of the one-sided support member 31 in Figure 9, Figure 15 is a plan view of the one-sided support member 31 in Figure 14 as seen from above the building structure X1, and Figure 16 is a perspective view of the one-sided support member 31 in Figure 14 as seen from diagonally above the building structure X1. Figure 17 is a plan view of the state in which the locking device is attached to the abutment in Figure 14 as seen from above the building structure X1. Furthermore, Figure 18 is an explanatory diagram showing the state in which the joint materials 21, 22 and water-stopping plates 23 on both the upper and lower sides are held by the three abutments attached to the one-sided support member 31 and the other-sided support member 32 of Figure 8, as viewed from the short side of the structure X1, and Figure 19 is an explanatory diagram showing the state in which the joint materials 21, 22 and water-stopping plates 23 on both the upper and lower sides are held by each abutment of the one-sided support member 31 of Figure 18, as viewed from diagonally above the structure X1.

[0041] As shown in Figures 14 to 19, upper, middle, and lower abutments 41, 42, and 43 are attached to the vertical pieces 33 of each one-sided support member 31 and each other-sided support member 32 at three locations in the vertical direction corresponding to the partitioning direction of the upper and lower joint materials 21 and 22, respectively, to hold the joint materials 21 and 22 on both the upper and lower sides. Each abutment 41 to 43 is formed in a block shape with flat upper and lower surfaces using a cement-based material.

[0042] Furthermore, each abutment 41 to 43 has a locking device 44 attached to its base end that engages with the vertical piece 33 of each one-sided support member 31 and each other-sided support member 32. This locking device 44 comprises a base-end locking piece 441 that engages with a bifurcated locking portion 45 at the base end of each abutment 41 to 43, and a tip-end locking piece 442 that is integrally provided with the base-end locking piece 441 and engages with the vertical piece 33 of each one-sided support member 31 and each other-sided support member 32 in a way that prevents it from falling out and prevents it from moving in the vertical direction.

[0043] The tips of each abutment device 41 to 43 are formed on flat surfaces perpendicular to both the upper and lower surfaces, and are brought into contact with the joint materials 21 and 22 on both the upper and lower sides of the partitioned areas 11 and 12, respectively, with their tips facing each other from the sides of the partitioned areas 11 and 12, thereby holding the joint materials 21 and 22 on both the upper and lower sides at four points spaced apart in the left-right direction. At this time, the tip of the upper abutment device 41 is brought into contact with the vicinity of the upper end of the upper joint material 21 from the sides of the partitioned areas 11 and 12, and the tip of the central abutment device 42 is brought into contact with the vicinity of the lower end of the upper joint material 21 from the sides of the partitioned areas 11 and 12.

[0044] Furthermore, the tips of the lower abutments 43 of one and the other partitioned areas 11 and 12 abut against the area near the upper end of the lower joint material 22 from both the one and the other partitioned areas 11 and 12, facing each other, and hold the area near the upper end of the lower joint material 22 at four points spaced apart in the left-right direction. In addition, the lower end of the lower joint material 22 is fixed by angle members 46, 46 with a roughly L-shaped cross-section attached to the installation surface S, sandwiched from both the one and the other partitioned areas 11 and 12. Then, the central and lower abutments 42 and 43 in the partitioned areas 11 and 12 of one and the other are brought into contact with the front and rear sides of the strip-shaped water-stopping plate 23, which sandwiches the joint materials 21 and 22 on both the upper and lower sides, from both above and below by the lower surface of the central abutment 42 and the upper surface of the lower abutment 43. In this state, the water-stopping plate 23 on the partitioned areas 11 and 12 of one and the other is held in place by being clamped from both above and below (in the thickness direction) at four points spaced apart in the left and right directions.

[0045] Furthermore, the joint structure of the frame X1, in which adjacent partition areas 11 and 12 are connected to each other via the joint 1, comprises a joint material 2 having upper and lower joint materials 21 and 22 and a water-stopping plate 23, as well as one-side and other-side support members 31 and 32, upper, central and lower abutments 41, 42 and 43, and upper and lower lead-out reinforcing bars 14 and 15, a coupler 16, and upper and lower reinforcing bars 17 and 17 as reinforcement for the continuous missing portion B4 of the frame X1.

[0046] Next, we will explain an example of a concrete pouring method using the joint structure of the structural frame X1.

[0047] First, in the adjacent partition areas 11 and 12 separated by a joint 1, the upper and lower joint materials 21 and 22 are supported from one and the other partition area 11 and 12 sides, respectively, by upper, central, and lower abutments 41, 42, 43 attached vertically to the vertical pieces 33 of each of the one-side and the other-side support members 31 and 32, respectively, so that the tips of the upper and lower joint materials 21 and 22 are brought into contact with each other from one and the other partition area 11 and 12 sides. Meanwhile, the water-stopping plate 23 is held in place by the opposing surfaces (bottom and top surfaces) of the central and lower abutments 42 and 43, which are vertically opposed to each other, in contact from both above and below.

[0048] Then, in this state, the upper and lower reinforcing bars 17, 17 and couplers 16 that connect the upper and lower reinforcing bars 14, 15 that lead out to the defective area B4 in the partitioned areas 11, 12 on one side and the other side are fastened with wire to the upper end pieces 34 of the four one-side and other-side support members 31, 32 that are spaced apart in the left-right direction of the joint 1, while the lower end pieces 35 are fastened with U-bolts 18 and nuts 19, respectively.

[0049] Then, concrete is poured into both partitioned areas 11 and 12, and the joint materials 21 and 22 on both the upper and lower sides are held in place by the contact of the tips of the abutting devices 41 to 43 attached in the vertical direction to each of the one-sided support members 31 and each of the other-sided support members 32, while the water-stopping plate 23 is sandwiched between them from both the upper and lower sides. The joint materials 21 and 22 and the water-stopping plate 23 are then placed on the abutting surfaces of the concrete C, C of both partitioned areas 11 and 12, so as to allow the concrete C, C of adjacent partitioned areas 11 and 12 to cure simultaneously.

[0050] In this way, it becomes possible to simultaneously pour concrete C,C into two adjacent partition areas 11 and 12. As a result, without using formwork to separate the two partition areas 11 and 12, the curing period for the concrete C,C in both partition areas 11 and 12 is completed simultaneously with a single concrete pouring operation, and the construction period for the structural frame X1 having joints 1 can be significantly shortened.

[0051] Furthermore, the water-stopping plate 23 is sandwiched between both compartment areas 11 and 12 by bringing the opposing surfaces (bottom and top surfaces) of the central and lower contact devices 42 and 43, which hold the joint materials 21 and 22 on both the upper and lower sides by bringing their tips into contact with each other from both above and below, respectively, when the joint materials 21 and 22 on both the upper and lower sides are facing each other. This makes it possible to hold the water-stopping plate 23 using the central and lower contact devices 42 and 43, which hold the joint materials 21 and 22 on both the upper and lower sides by bringing their tips into contact, eliminating the need to use a separate holder for holding the water-stopping plate and allowing for cost reduction due to a reduction in the number of parts.

[0052] Furthermore, each one-sided support member 31 and each other-sided support member 32 are equipped with a vertical piece 33 that extends substantially vertically in the vertical direction so as to face each other with the joint materials 21 and 22 on both the upper and lower sides, and an upper end piece 34 and a lower end piece 35 that extend substantially parallel to each other in a direction away from the joint material 2 from both the upper and lower ends of the vertical piece 33. Each one-sided support member 31 and each other-sided support member 32 are fastened to the couplers 16 of each reinforcing bar 17 and lower lead-out reinforcing bar 15 on one partitioned area 11 side of the continuous missing portion B4 of the structure X1 by U-bolts 18 and nuts 19 at two locations on the front and rear of the flat plate material 36 of the lower end piece 35. On the other hand, the upper end piece 34 of each one-sided support member 31 and each other-sided support member 32 are fastened to the upper reinforcing bars 17 and couplers 16 at multiple locations in the front and rear direction by binding wire.

[0053] This allows each one-sided support member 31 and each other-sided support member 32 to be firmly fixed to the couplers 16 of the upper and lower reinforcing bars 17, 17 and the upper and lower lead-out reinforcing bars 14, 15 of both partitioned areas 11, 12, with a gap between them in the left-right direction of the joint material 2. Furthermore, the joint materials 21, 22 on both the upper and lower sides are securely held by the contact of the tips of the upper, central, and lower contacts 41, 42, 43 attached in the vertical direction of the vertical pieces 33 of each one-sided support member 31 and each other-sided support member 32, respectively, while the water-stopping plate 23 is securely held by the lower surface of the central contact 42 and the upper surface of the lower contact 43, which are opposite each other, being clamped from both above and below on the partitioned areas 11, 12 sides of the water-stopping plate 23.

[0054] Furthermore, since three upper, central, and lower contacts 41, 42, and 43 are attached vertically to the vertical pieces 33 of each one-sided support member 31 and each other-sided support member 32, the upper contact 41 can be used to abut and hold the upper joint material 21 near the upper end by the central contact 42 and lower contact 43, which sandwich the water-stopping plate 23 between their opposing surfaces (bottom and top), thereby enabling smooth holding of the joint materials 21, 22 and the water-stopping plate 23 on both the upper and lower sides.

[0055] Furthermore, since the lower end of the lower joint material 22 is fixed to the installation surface S by angle members 46, 46, the upper and lower ends of the lower joint material 22 can be held more securely in combination with the contact of the tip of the lower abutment 43 with the upper end from one and the other partitioned area 11, 12 sides.

[0056] In the first embodiment described above, the upper end pieces 34 of each one-sided support member 31 and each other-sided support member 32 were fastened to the upper reinforcing bars 17 and couplers 16 with binding wire, but they may also be fastened to the upper reinforcing bars and couplers with U-bolts and nuts.

[0057] Furthermore, in the first embodiment described above, three upper, central, and lower abutments 41, 42, and 43 were attached to the vertical pieces 33 of each one-sided support member 31 and each other-sided support member 32. However, two or more abutments may be attached to the vertical pieces of each one-sided support member and each other-sided support member.

[0058] Furthermore, in the first embodiment described above, four one-sided support members 31 and four other-sided support members 32 were provided in one and the other partitioned areas 11 and 12, respectively, spaced apart in the left-right direction. However, one one-sided support member and one other-sided support member may be provided in each of the partitioned areas, respectively, and multiple abutments may be provided at a distance from these two-sided support members in the left-right direction.

[0059] Furthermore, in the first embodiment described above, the lower end of the lower joint material 22 was fixed to the installation surface S by being sandwiched between angle members 46, 46 from one and the other partitioned area 11, 12 sides. However, the lower end of the lower joint material may be fixed to the installation surface from only one or the other partitioned area 11, 12 side.

[0060] Furthermore, in the first embodiment described above, the upper, central, and lower contacts 41, 42, and 43 were formed from cement-based materials, but they may also be molded from a hard synthetic resin or the like that has high impact resistance.

[0061] Furthermore, in the first embodiment described above, the length of the frame X1 of the precast concrete structure B in the front-to-back direction was set to 1000 mm, but the length of the frame of the structure in the front-to-back direction is not limited to this, and it goes without saying that the parts to be divided may also be appropriately changed considering the weight and shape during transportation.

[0062] Next, a second embodiment of the present invention will be described based on the drawings.

[0063] In this embodiment, the structural frame constructed using a joint structure for the frame is modified.

[0064] Figure 20 shows a partially cutaway perspective view of a retaining wall (structure) constructed using the joint structure according to the second embodiment of the present invention, with a portion of the concrete cut out.

[0065] In other words, in this embodiment, as shown in Figure 20, the structure X2 is a retaining wall consisting of a base plate X21 that blocks water intrusion between one side (upper side in Figure 20) and the other side (lower side in Figure 20) where watertightness is required, and a vertical wall X22 that rises from the base plate X21 and blocks water intrusion between one side (right side in Figure 20) and the other side (left side in Figure 20) where watertightness is required. In this case, one side in the short direction of the vertical wall X22 is the inside, and the other side in the short direction of the vertical wall X22 is the outside.

[0066] The base slab X21 is constructed in the longitudinal direction (front-to-back) by concrete poured on the installation surface S at the construction site of the frame X2. In this case, the concrete C1 poured in the front-to-back direction of the base slab X21 also needs to have joints 50 at predetermined lengths (for example, about 3000 mm), and the adjacent base slab side compartment areas 51 and 52 are constructed in a shape where they are alternately connected in the front-to-back direction via the joints 50.

[0067] The joint 50 consists of a base slab-side joint material that prevents cracks caused by shrinkage of concrete C from occurring in the structure X2. This base slab-side joint material (joint 50) is spaced approximately 3000 mm apart in the front-rear direction of the structure X2. Furthermore, the joint 50 is equipped with a strip-shaped base slab-side waterstop plate 63 that is installed and incorporated into the concrete C, C of adjacent base slab-side compartment areas 51, 52. This base slab-side waterstop plate 63 is embedded so as to span both adjacent compartment areas 51, 52.

[0068] Figure 21 is a longitudinal section view of the retaining wall shown in Figure 20 with the reinforcing bars assembled, viewed from one side in the shorter direction, and Figure 22 is a cross-sectional plan view of the retaining wall shown in Figure 21 with the reinforcing bars assembled, viewed from above.

[0069] As shown in Figures 21 and 22, the joint material on the bottom slab side is divided into two sections vertically, where watertightness is required to block the infiltration of groundwater from the lower side (other side) to the upper side (one side), and comprises an upper joint material 61 as the joint material on one side and a lower joint material 62 as the joint material on the other side. The upper joint material 61 and the lower joint material 62 are placed between the abutting surfaces of the concrete C, C in the adjacent bottom slab side compartment areas 51 and 52. The upper joint material 61 and the lower joint material 62 are made of resin-based foam or asphalt-based panel-shaped members, and are required to have a thickness that can absorb the expansion and contraction of the concrete C, C poured in the adjacent bottom slab side compartment areas 51 and 52, respectively.

[0070] The bottom slab water-stopping plate 63 is formed into a panel shape from a flexible material such as rubber or polyvinyl chloride, and is sandwiched between the joint materials 61 and 62 on both the upper and lower sides to block water from seeping in from the lower side to the upper side at the joint 50 of the bottom slab X21. The bottom slab water-stopping plate 63 is embedded horizontally and positioned approximately horizontally, straddling both concrete C and C of the adjacent bottom slab compartment areas 51 and 52. In this case, the joint materials 61 and 62 on both the upper and lower sides are divided vertically by the bottom slab water-stopping plate 63.

[0071] In each of the base slab side compartment areas 51, 52, 51, 52, ..., multiple reinforcing bar frames 70, 70, ... (reinforcing bars) are provided at approximately equal intervals (e.g., 300 mm) in the front-to-back direction of the base slab X21 of the structure X2. These frames are formed into approximately rectangular frames by upper and lower reinforcing bars 71 and 72 that extend in approximately L-shapes or U-shapes in the left-to-right direction, corresponding to the inward-to-outward direction (short side direction) of the base slab X21, respectively. Each reinforcing bar frame 70 is installed on the installation surface S via spacers 74, with the lower sides of the upper reinforcing bars 71 and lower reinforcing bars 72 fixed to the distribution reinforcing bars 73, 73 that extend in the front-to-back direction of the base slab X21, respectively.

[0072] Each reinforcing bar 73 is installed at predetermined intervals (for example, 200-300 mm) in the left-right direction and is fixed in place so as to extend in the front-back direction and straddle each reinforcing bar frame 70. The upper bars 71 and lower bars 72 are then fastened to the upper and lower ends of the setting bars 75, 75, which extend in the up-down direction, with metal binding wires 76, 76, ... (fasteners). In this case, the ends of the upper bars 71 and lower bars 72 are also fastened to each other with binding wires (not shown).

[0073] Furthermore, in the adjacent side compartment areas 51 and 52 of the base plate, four side support members 77, 77, ... are provided at intervals in the left-right direction of the base plate X21. Each of these side support members 77 is formed in a roughly U-shape, with both ends opening toward the joint materials 61 and 62 on both the upper and lower sides, and is fastened to the approximate center of the setting lines 75 and 75 with binding wires 76, 76, .... Both ends of each side support member 77 are bent approximately 90° in the vertical direction, separating them from each other.

[0074] Figure 23 is an enlarged perspective view of the two abutments attached to the one-sided and the other-sided support members 77 used in the joint structure of the frame X2 in Figure 20, and Figure 24 is an exploded perspective view showing the two abutments from Figure 23 removed from the one-sided and the other-sided support members 77. Note that each one-sided and the other-sided support members 77 have the same configuration, so only each one-sided support member 77 is shown in Figures 23 and 24.

[0075] As shown in Figures 23 and 24, upper and lower abutments 81 and 82 are attached to both ends of each one-sided and each other-sided support member 77 at two locations, upper and lower, corresponding to the partitioning direction of the upper and lower joint materials 61 and 62, respectively, to hold the joint materials 61 and 62 on both the upper and lower sides. Each abutment 81 and 82 is formed in a block shape using a cement-based material, with all surfaces except the base end being flat.

[0076] Furthermore, locking devices 83, 83 are attached to both ends of each one-side and each other-side support member 77, respectively, to lock the base ends of each abutment 81, 82. Each locking device 83 is fixed to both ends of each one-side and each other-side support member 77 with their openings facing each other vertically, and is equipped with roughly U-shaped covering pieces 84, 84 that are loosely fitted over the upper abutment 81 from above and loosely fitted over the lower abutment 82 from below.

[0077] Furthermore, each locking device 83 is screwed into one end of both overlay pieces 84, 84 (the front side in Figures 23 and 24), and is equipped with a fastening bolt 85, 85 whose tip contacts the upper and lower contact devices 81, 82 to secure both overlay pieces 84, 84, respectively. In addition, each locking device 83 is equipped with a connecting pin 86, 86 that connects the ends of both overlay pieces 84, 84 from the opposite side of the contact devices 81, 82. Each locking device 83 allows the two abutting devices 81 and 82 to move until the connecting pin 86 contacts the base end surface of each abutting device 81 and 82 when the two overlay pieces 84 and 84 are placed over the two abutting devices 81 and 82. The two abutting devices 81 and 82 are then secured with the fixing bolts 85 while their tip surfaces are in contact with the upper and lower joint materials 61 and 62, thereby positioning the two abutting devices 81 and 82 relative to both ends of the one-sided and the other-sided support members 77.

[0078] Both abutment fittings 81 and 82 have their tips formed on flat surfaces perpendicular to both the upper and lower surfaces, and are designed to abut the joint materials 61 and 62 on both the upper and lower sides of the base plate side partition areas 51 and 52, respectively, with their tips facing each other from the sides of the base plate side partition areas 51 and 52. The joint materials 61 and 62 on both the upper and lower sides are held by four support members 77 on each side and on the other side, spaced apart in the left-right direction of the base plate X21. At this time, the tip of each upper abutment fitting 81 abuts the area near the lower end of the upper joint material 61 from the sides of the base plate side partition areas 51 and 52, and the tip of each lower abutment fitting 82 abuts the area near the upper end of the lower joint material 62 from the sides of the base plate side partition areas 51 and 52.

[0079] Furthermore, the tips of the upper and lower abutments 81 and 82 of the two base plate side compartment areas 51 and 52 abut against the joint materials 61 and 62 on both the upper and lower sides, facing each other from the base plate side compartment areas 51 and 52 sides, and hold the joint materials 61 and 62 at four points spaced apart in the left-right direction (the shorter side direction of the structure X2). The upper and lower abutments 81 and 82 then abut both the front and rear sides of the base plate side waterstop plate 63, which sandwiches the joint materials 61 and 62 on both the upper and lower sides, from above and below with the lower surface of the upper abutment 81 and the upper surface of the lower abutment 82. In this state, the base plate side waterstop plate 63 on one and the other sides of the base plate side compartment areas 51 and 52 are held by being clamped from above and below (in the thickness direction) at four points spaced apart in the left-right direction.

[0080] Here, we will explain an example of a method for pouring concrete for the base slab X21 using the joint structure of the main frame X2.

[0081] First, in the adjacent base slab side compartment areas 51 and 52 on one and the other sides connected by a joint 50, the lower sides of the upper reinforcement 71 and lower reinforcement 72 are fixed to the distribution reinforcement 73, 73 extending in the front-rear direction of the base slab X21, respectively, and multiple reinforcing bar frames 70, 70, ... are installed on the installation surface S at approximately equal intervals in the front-rear direction of the base slab X21 via spacers 74. Furthermore, the support members 77, 77 on each side are tightened to each reinforcing bar frame 70 in the base slab side compartment areas 51 and 52 on one and the other sides via setting reinforcement 75, 75 extending in the vertical direction using binding wire 76.

[0082] Next, upper and lower abutments 81 and 82 are attached to both ends of each of the support members 77, 77 on one side and the other side, respectively, via locking devices 83. At this time, the tip surfaces of both abutments 81 and 82 are brought into contact with the upper and lower joint materials 61 and 62, and the front and rear sides of the bottom plate water stopper plate 63 are sandwiched from above and below by the lower surface of the upper abutment 81 and the upper surface of the lower abutment 82, and both abutments 81 and 82 are secured with fastening bolts 85.

[0083] Subsequently, concrete C1, C1 is poured into the two base plate side partition areas 51, 52, which are partitioned from both the inside and outside by the inner base plate formwork K11 and the outer base plate formwork K12 (shown in Figure 25). The joint materials 61, 62 on both the upper and lower sides are held in place by the contact of the tip surfaces of the upper and lower abutting devices 81, 82 attached to the upper and lower ends of the support members 77 on each side, respectively, while the base plate side water stop plate 63 is sandwiched between them from both the upper and lower sides. The joint materials 61, 62 and the base plate side water stop plate 63 are then placed on the abutting surfaces of the concrete C1, C1 in the two base plate side partition areas 51, 52, respectively, so that the concrete C1, C1 in the adjacent base plate side partition areas 51, 52 are cured simultaneously. The inner base plate formwork K11 and the outer base plate formwork K12 are removed after the concrete C1, C1 has cured.

[0084] In this way, it is possible to simultaneously pour concrete C1, C1 into the adjacent base slab side partition areas 51, 52. As a result, without using formwork to separate the base slab side partition areas 51, 52, the curing period for the concrete C1, C1 in both base slab side partition areas 51, 52 is completed simultaneously with a single concrete pouring operation, and the construction period for the base slab X21 of the structure X2 having a joint 50 can be significantly shortened.

[0085] Furthermore, the upper and lower contact devices 81 and 82, which hold the joint materials 61 and 62 on both the upper and lower sides facing each other, are brought into contact at their tips, and their opposing surfaces (bottom and top surfaces) are brought into contact from both above and below, thereby sandwiching the bottom plate side water stop plate 63 between both bottom plate side compartments 51 and 52. This makes it possible to hold the bottom plate side water stop plate 63 using the upper and lower contact devices 81 and 82, which hold the joint materials 61 and 62 on both the upper and lower sides by contact at their tips, eliminating the need to use a separate holder for holding the bottom plate side water stop plate 63, and thus reducing the cost by reducing the number of parts.

[0086] Next, we will explain the vertical wall X22 of the retaining wall.

[0087] Figure 25 shows a longitudinal rear view of the vertical wall X22 of the retaining wall shown in Figure 20, with the reinforcing bars assembled, viewed from the other side in the longitudinal direction. Figure 26 shows a longitudinal side view of the vertical wall X22 of the retaining wall shown in Figure 25, with the reinforcing bars assembled, viewed from one side in the short direction. Figure 27 is an explanatory diagram showing, viewed from above, the state in which the joint material on one side and the water-stopping plate on the other side are held by two abutments attached to the support members on one side and the other side used in the joint structure of the frame X2 of Figure 20. Furthermore, Figure 28 shows a longitudinal rear view of the vertical wall X22 of the retaining wall shown in Figure 25, with concrete poured into it, viewed from the other side in the longitudinal direction. Figure 29 shows a longitudinal rear view of the vertical wall X22 of the retaining wall shown in Figure 28, with the concrete curing completed, viewed from the other side in the longitudinal direction.

[0088] As shown in Figures 25 to 29, the vertical wall X22 rises from the base slab X21 at the construction site of the frame X2, blocking the intrusion of water between one side (right side in Figure 25) and the other side (left side in Figure 20) where watertightness is required. The vertical wall X22, like the base slab X1, is constructed in the longitudinal direction (front to back) by concrete C2 poured on the base slab X1. In this case, the concrete C2 poured in the front to back direction of the vertical wall X22 also needs to have joints 54 at predetermined lengths (for example, about 3000 mm), and the adjacent vertical wall side compartment areas 55 and 56 are constructed in a shape where they are alternately connected in the front to back direction via the joints 54.

[0089] The joint 54 consists of a vertical wall-side joint material that prevents cracks caused by shrinkage of concrete C2 from occurring in the vertical wall X22 of the structural frame X2. This vertical wall-side joint material (joint 54), like the base plate X21, is spaced approximately 3000 mm apart in the front-rear direction of the vertical wall X22. Furthermore, the joint 54 is equipped with a strip-shaped vertical wall-side waterstop plate 67 that is installed and incorporated into the concrete C2, C2 of the two adjacent vertical wall-side compartment areas 55, 56. This vertical wall-side waterstop plate 67 is embedded so as to straddle the two adjacent compartment areas 55, 56. In this case, the lower end of the vertical wall-side waterstop plate 67 is connected to the base plate-side waterstop plate 63 of the base plate X21.

[0090] Furthermore, the vertical wall side joint material 64 is divided into two sections in the left-right direction, which is the inward-outward direction where watertightness is required to block the intrusion of water from the outside (other side) to the inside (one side), and is equipped with an inner joint material 65 as the joint material for one side and an outer joint material 66 as the joint material for the other side. These inner joint material 65 and outer joint material 66 are placed between the abutting surfaces of the respective concrete C2, C2 in the two adjacent vertical wall side partition areas 55, 56. The inner joint material 65 and outer joint material 66 are made of resin-based foam or asphalt-based panel-shaped members, and are required to have a thickness that can absorb the expansion and contraction of the concrete C2, C2 poured in the two adjacent vertical wall side partition areas 55, 56, respectively.

[0091] The vertical wall-side water-stopping plate 67 is formed into a panel shape from a flexible material such as rubber or polyvinyl chloride, and is sandwiched between the joint materials 65 and 66 on both the inside and outside sides to block the intrusion of water from the outside to the inside at the joint 54 of the vertical wall X22. The vertical wall-side water-stopping plate 67 is embedded so as to straddle both concrete C2, C2 of the adjacent vertical wall-side compartment areas 55 and 56 and is erected almost vertically. In this case, the joint materials 65 and 66 on both the inside and outside sides are separated to the inside and outside by the vertical wall-side water-stopping plate 67.

[0092] In each of the vertical wall-side compartment areas 55, 56, 55, 56, ..., multiple reinforcing bar frames 90, 90, ... (reinforcements) are provided at approximately equal intervals (e.g., 300 mm) in the front-to-back direction (left-to-right direction in Figure 24). These frames are formed in a roughly rectangular shape by approximately L-shaped or U-shaped internal reinforcements 91 and external reinforcements 92 that extend vertically along the vertical direction of the vertical wall X22, respectively. The internal reinforcements 91 and external reinforcements 92 of each reinforcing bar frame 90 extend approximately vertically from the lower reinforcements 72 of each reinforcing bar frame 70 of the base slab X21, and their base ends are fastened to the lower reinforcements 72 and upper reinforcements 71, respectively, by binding wires 76, 76, ...

[0093] Each rebar frame 90 is fixed to the outside of the internal reinforcement 91 and external reinforcement 92 on the distribution reinforcement bars 93, 93 that extend in the front-to-back direction of the vertical wall X22. Each distribution reinforcement bar 93 is provided at predetermined intervals (e.g., 200-300 mm) in the vertical direction and is fixed in the front-to-back direction, straddling each rebar frame 90. In addition, approximately U-shaped width-retaining bars 94 are attached to each internal and external distribution reinforcement bar 93 at equal intervals to maintain the internal-to-external spacing (internal-to-external width) of each rebar frame 90. In this case, two width-retaining bars 94 are provided between two adjacent rebar frames 90, 90 that are close to the joint materials 65, 66 on both the internal and external sides.

[0094] Furthermore, in the adjacent vertical wall side partition regions 55, 56, three one-side and one-other-side support members 99, 99, 99 are provided at intervals in the vertical direction of the vertical wall X22. Each of these one-side and one-other-side support members 99 is formed in a roughly U-shape, with both ends opening toward the joint materials 65, 66 on both the inner and outer sides, and is fastened with binding wire 76, 76, ... to the approximate center of two width-retaining bars 94, 94 between two reinforcing bar frames 90, 90 adjacent to the joint materials 65, 66 on both the inner and outer sides. Both ends of each one-side and one-other-side support member 99 are bent approximately 90° in the inward and outward directions (vertical direction) away from each other.

[0095] At both ends of each of the support members 99 on one side and the other side, inner and outer abutments 87 and 88 are attached, respectively, at two locations on the inside and outside that correspond to the partitioning direction of the inner and outer joint materials 65 and 66, and hold the joint materials 65 and 66 on both the inner and outer sides. Each abutment 87 and 88 is formed in a block shape using a cement-based material, with all surfaces except the base end being flat.

[0096] Furthermore, locking devices 83, 83 are attached to both ends of each one-side and each other-side support member 99, respectively, to lock the base ends of each abutment 87, 88. Each locking device 83 is equipped with overlay pieces 84, 84 fixed to both ends of each one-side and each other-side support member 99 with their openings facing inward and outward (left and right). The overlay piece 84 is loosely fitted over the inner abutment 87 from the inside, while the overlay piece 84 is loosely fitted over the outer abutment 88 from the outside.

[0097] Furthermore, each locking device 83 secures the two overlay pieces 84, 84 by having the tip of a fastening bolt 85, which is screwed into one end of each overlay piece 84, 84, contact the inner and outer contact pieces 87, 88. Each locking device 83 allows the two contact pieces 87, 88 to move until the connecting pin 86 contacts the base end surface of each overlay piece 84, 84. The two contact pieces 87, 88 are then secured by the fastening bolt 85 with their tip surfaces in contact with the inner and outer joint materials 65, 66, thereby positioning the two contact pieces 87, 88 relative to both ends of the one and the other support members 99.

[0098] Both abutment fittings 87 and 88 have their tips formed on flat surfaces perpendicular to both the inner and outer surfaces, and are designed to abut the joint materials 65 and 66 on both the inner and outer sides of the vertical wall partition areas 55 and 56, respectively, with their tips facing each other from the sides of the vertical wall partition areas 55 and 56. The joint materials 65 and 66 on both the inner and outer sides are held by three support members 99 on each side and on the other side, spaced apart in the vertical direction of the vertical wall X22. At this time, the tip of each inner abutment fitting 87 abuts the vicinity of the outer end of the inner joint material 65 from the sides of the vertical wall partition areas 55 and 56, and the tip of each outer abutment fitting 88 abuts the vicinity of the inner end of the outer joint material 66 from the sides of the vertical wall partition areas 55 and 56.

[0099] Furthermore, the tips of the inner and outer contacts 87 and 88 of the two vertical wall compartment regions 55 and 56 abut against the joint materials 65 and 66 on both the inner and outer sides, facing each other from the side of the two vertical wall compartment regions 55 and 56, and hold the two joint materials 65 and 66 at three points spaced apart in the vertical direction. The inner and outer contacts 87 and 88 then abut both the inner and outer sides of the vertical wall waterstop plate 67, which sandwiches the joint materials 65 and 66 on both the inner and outer sides, with the outer surface of the inner contact 87 and the inner surface of the outer contact 88 abutting from both the inside and outside. In this state, the vertical wall waterstop plate 67 is held by being clamped from both the inside and outside (in the thickness direction) at three points spaced apart in the vertical direction, on both the side of the vertical wall compartment region 55 and 56.

[0100] Here, we will explain an example of a method for pouring concrete C2 into a vertical wall X22 using the joint structure of the structural frame X2.

[0101] First, in the adjacent vertical wall partition areas 55 and 56 on one and the other sides connected by a joint 54, multiple reinforcing bars 90, 90, ... are installed at approximately equal intervals in the front-to-back direction of the vertical wall X22 by internal and external reinforcing bars 91 and 92 that extend approximately vertically from the lower reinforcing bars 72 of each reinforcing bar frame 70 of the base slab X21. Furthermore, the support members 99, 99 on each side and each side are tightened to each reinforcing bar frame 90 in the base slab partition areas 55 and 56 on one and the other sides by binding wire 76 via front and rear width-retaining bars 94, 94 to the internal and external distribution bars 93, 93.

[0102] Then, inner and outer contact members 87 and 88 are attached to both ends of each of the support members 99, 99 on one side and the other side, respectively, via locking devices 83. As shown in Figure 25, the attachment of the inner and outer contact members 87 and 88 with the locking devices 83 is carried out sequentially from the bottom of the three vertical locations, and the vertical wall side water stop plate 67 is bent in the middle due to its own weight.

[0103] At this time, the tip surfaces of both abutment fittings 87 and 88 are brought into contact with the inner and outer joint materials 65 and 66, and the front and rear sides of the vertical wall side water stop plate 67 are sandwiched from above and below by the lower surface of the upper abutment fitting 81 and the upper surface of the lower abutment fitting 82, and the abutment fittings 81 and 82 are secured with fixing bolts 85, starting from the bottom.

[0104] Subsequently, concrete C2, C2 is poured into the two vertical wall-side partition areas 55, 56, which are partitioned from both the inside and outside by the inner formwork K21 and outer formwork K22 for vertical walls (shown in Figures 27 and 28). The joint materials 65, 66 on both the inside and outside sides are held in place by the contact of the tip surfaces of the inner and outer abutments 87, 88 attached to the inner and outer ends of the support members 99, 99 on each side, respectively, while the vertical wall-side water stop plate 67 is sandwiched between them on both the inside and outside. The joint materials 65, 66 and the vertical wall-side water stop plate 67 are then placed on the abutting surfaces of the concrete C2, C2 in the two vertical wall-side partition areas 55, 56, respectively, so as to simultaneously cure the concrete C2, C2 in the adjacent base plate-side partition areas 55, 56. The inner formwork K21 and outer formwork K22 for the vertical walls will be removed after the concrete C2, C2 has cured.

[0105] In this way, it becomes possible to simultaneously pour concrete C2, C2 into the adjacent vertical wall partition areas 55, 56. As a result, without using formwork to separate the vertical wall partition areas 55, 56, the curing period for the concrete C2, C2 in both vertical wall partition areas 55, 56 is completed simultaneously with a single pouring operation of concrete C1, C2 into the two vertical wall partition areas 55, 56. Combined with the construction of the base slab X2 having joints 50, the construction period for the main structure X2 can be significantly shortened.

[0106] Furthermore, the inner and outer contact devices 87 and 88, which hold the joint materials 65 and 66 on both the inside and outside sides by bringing their tips into contact with each other, hold the vertical wall side water stop plate 67 between both vertical wall side compartment areas 55 and 56. This makes it possible to hold the vertical wall side water stop plate 67 using the inner and outer contact devices 87 and 88, which hold the joint materials 65 and 66 on both the inside and outside sides by bringing their tips into contact with each other, eliminating the need to use a separate holder for holding the vertical wall side water stop plate 67 and allowing for cost reduction due to a reduction in the number of parts.

[0107] In the second embodiment described above, the support members 77 and 99 on each side and the other side were fastened to the setting reinforcement bars 75 and the width-retaining reinforcement bars 94 with wire 76, but they may also be fastened to the setting reinforcement bars and the width-retaining reinforcement bars with U-bolts and nuts.

[0108] Furthermore, in the second embodiment described above, two upper and lower contacts 81, 82 and two inner and outer contacts 87, 88 were attached to each of the one-sided and the other-sided support members 77, 99, respectively. However, the ends of each one-sided support member and each other-sided support member may be branched into three or more forks, and three or more contacts may be attached to each end.

[0109] Furthermore, in the second embodiment described above, four one-side and other-side support members 77 are provided in the one and the other base plate side partition regions 51, 52, respectively, spaced apart in the left-right direction. However, one or more than four one-side and other-side support members may be provided in the one and the other base plate side partition regions. On the other hand, three one-side and other-side support members 99 are provided in the one and the other vertical wall side partition regions 55, 56, respectively, spaced apart in the vertical direction. However, one or more than three one-side and other-side support members may be provided in the one and the other vertical wall side partition regions.

[0110] Furthermore, in the second embodiment described above, the upper and lower contacts 81, 82 and the inner and outer contacts 87, 88 were formed from cement-based materials, but they may also be molded from a hard synthetic resin or the like that has high impact resistance. [Explanation of symbols]

[0111] 1st joint 11 One partitioned area 12 Other partitioned area 16 Coupler (rebar) 17 Upper and lower reinforcing bars 18 U-bolt (fastener) 19. Nut (fastener) 2. Joint material 21. Upper joint material (single-sided joint material) 22. Lower joint material (other joint material) 23 Water stop plate 31 One-sided support member 32 Other side support member 33. Vertical piece (straight piece) 34 Upper end piece (one side separated piece) 35 Lower end piece (other side separation piece) 41 Upper contact tool (contact tool) 42. Central side support (support) 43 Lower abutting tool (abutting tool) 46 Angle members 50th joint 51 One side of the base plate partition area 52 Other bottom plate side compartment area 54th joint 55 Compartment area on one side of the vertical wall 56 The other vertical wall side partition area 61 Upper joint material (single-sided joint material) 62. Lower joint material (other joint material) 63. Bottom plate side water stop plate (water stop plate) 65. Inner joint material (single-sided joint material) 66 Outside joint material (other side joint material) 67. Water stop plate on the vertical wall side (water stop plate) 70 Reinforcement frame (reinforcement) 75 Reinforcement bars Line 76 (fastener) 77 Support members on one side and the other side 81 Upper contact tool (contact tool) 82 Lower abutting tool (abutting tool) 87. Medial adhesive device (adhesive device) 88 Outside contact tool (Abutment tool) 90 Reinforcement frame (reinforcement) 94 Reinforcement bars (bars) to prevent widening 99 Support members on one side and the other side C Concrete C1 Concrete C2 Concrete X1 skeleton X2 frame X21 bottom version X22 vertical wall

Claims

1. A joint structure of a frame in which multiple partitioned areas, each to which concrete is poured, are connected via joints, In each of the aforementioned partitioned areas, a joint material is placed between the concrete butt surfaces of two adjacent partitioned areas, and is divided into two sections, one side and the other side, where watertightness is required. A water-stopping plate is provided extending in the longitudinal direction to close the gap between the one-sided joint material and the other-sided joint material, and is embedded in the two partitioned areas so as to span the short direction, A one-sided support member is fixed to a reinforcing bar provided in one of the two partitioned areas, and supports the one-sided and other-sided joint materials from the side of the one partitioned area, respectively. A support member on the other side is fixed to the reinforcing bar provided in the other partitioned area of ​​the two partitioned areas, and supports the joint material on one side and the joint material on the other side from the other partitioned area side, Multiple fasteners are attached to the one-side and the other-side support members in the direction of the partitioning of the one-side and the other-side joint materials, and are brought into contact with the one-side and the other-side joint materials with their tips facing each other from the one-side and the other-side partitioning area sides, while the fasteners clamp the water-stopping plate with opposing surfaces that face each other in the partitioning direction of the one-side and the other-side joint materials in contact with each other from the thickness direction of the water-stopping plate, Equipped with, A joint structure for a building frame, characterized in that when concrete is poured into both of the aforementioned partitioned areas, the joint materials on one side and the other side are held in place by the contact of the tips of the abutting fittings attached to the one-side support member and the other-side support member, respectively, while the water-stopping plate is sandwiched from the thickness direction by the contact of the opposing surfaces of the abutting fittings, and the joint materials on one side and the other side and the water-stopping plate are arranged on the abutting surfaces of the concrete in both partitioned areas.

2. The aforementioned one-sided and other-sided support members include a straight piece that extends substantially straight in the partitioning direction of the one-sided and other-sided joint materials so as to face each other with the one-sided and other-sided joint materials in between, and a one-sided separating piece and a other-sided separating piece that extend substantially parallel to each other in directions away from the one-sided and other-sided joint materials, respectively, The joint structure of a building frame according to claim 1, wherein at least one of the one-sided and other-sided separating pieces is fixed to the reinforcing bars of the one-sided partitioned area and the other-sided partitioned area via fasteners.

3. The joint structure of a building frame according to claim 2, wherein at least three of the aforementioned abutments are attached to the straight pieces of the one-side and other-side support members in the direction of partitioning the one-side and other-side joint materials.

4. The joint structure of a building frame according to claim 3, wherein the one-sided support member and the other-sided support member are provided in multiple quantities at intervals in the longitudinal direction of the water-stopping plate.

5. The joint structure for a building frame according to any one of claims 1 to 4, wherein the joint material on one side and the joint material on the other side is divided into two sections, an upper side and a lower side, where watertightness is required, and the lower end of one of the lower sections is fixed to the installation surface by an angle member.

6. A concrete pouring method using a structural joint structure in which multiple compartmental areas to which concrete is poured are connected via joints, The system comprises: a joint material for one side and another for the other, which is placed between the concrete butt surfaces of two adjacent compartmental areas among the aforementioned compartmental areas and is divided into two sections, one side and the other side, where watertightness is required; and a water-stopping plate which extends in the longitudinal direction to close the gap between the one-side joint material and the other-side joint material and is embedded in the two compartmental areas so as to span the short direction; The tips of multiple abutments attached in the partitioning direction of the one-sided and other-sided joint materials to the one-sided support member that supports the one-sided and other-sided joint materials from the one-sided partitioned area side and the other-sided support member that supports the one-sided and other-sided joint materials from the other-sided partitioned area side are brought into contact with the one-sided and other-sided joint materials with each other facing each other from the one-sided and other-sided partitioned area side, while the water-stopping plate is held in place with opposing surfaces that face each other in the partitioning direction of the one-sided and other-sided joint materials in contact with each other from the thickness direction of the water-stopping plate. In this state, the one-sided support member is fixed to the reinforcing bar laid in the one partitioned area, and the other-sided support member is fixed to the reinforcing bar laid in the other partitioned area. A concrete pouring method using a structural joint structure, characterized in that concrete is poured into both partitioned areas, the one-side and other-side joint materials are held in place by the contact of the tips of the respective contacts of the one-side support member and the other-side support member, and the water-stopping plate is sandwiched from the thickness direction by the contact of the opposing surfaces of the respective contacts, and the one-side and other-side joint materials and the water-stopping plate are placed on the abutting surfaces of the concrete in both partitioned areas.

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