JP4439938B2 - Wall type reinforced concrete structure and its construction method - Google Patents

Description

  The present invention belongs to a technical field of a wall-type reinforced concrete structure having no pillars and beams and composed of a wall board and a floor board and its construction method.

  There are various types of wall-type reinforced concrete structures and their construction methods that include a wall plate and a floor plate without columns and beams (see, for example, Patent Document 1).

  In general, the joint between the wall plate and the floor plate of a wall-type reinforced concrete structure (wall-floor joint) is designed in comparison with the column beam joint of a reinforced concrete structure using columns and beams. Is uniformly small.

  For this reason, it is difficult to sufficiently fix the floor main bars arranged through the wall-floor joints, and the end of the floor main bars may come out of the wall-floor joints when subjected to seismic force. There was a problem that the required large proof stress could not be demonstrated in the long term. In addition, it is difficult to establish a shear design for the wall-floor joint, and there is a risk that many cracks will be generated in the wall-floor joint when subjected to seismic force. There was a problem that could not be demonstrated.

  The wall-type reinforced concrete structure disclosed in the above-mentioned Patent Document 1 has the above-mentioned problem by increasing the strength of the entire structure by devising the reinforcement of the reinforcing bar provided for constructing the wall board and floor board. A wall-type reinforced concrete structure that solves the problem and exhibits a required large proof stress in the long term is proposed (in particular, refer to claim 1). As another solution, a method of exhibiting a required large proof stress in the long term by increasing the thickness of the wall plate or the floor plate or providing a haunch at the wall floor joint portion may be considered. Moreover, the method of reducing the stress which arises in a wall floor junction part by reducing the span of a floor board or restricting the number of floors of a structure is also considered.

  However, according to each of the above solutions, the problem can be solved, but the workability is poor, the cost is increased, or there is a new problem that the degree of freedom of design with respect to the living room space and the building size is reduced. There is room for.

  By the way, in a structure such as a reinforced concrete structure using columns and beams, conventionally, by installing a cube-shaped joint member reinforced with high-strength concrete or the like at a column beam joint where stress is concentrated, Techniques for improving the strength and shear strength are disclosed (for example, see Patent Documents 2 and 3).

Japanese Patent Laid-Open No. 11-81450 JP-A-6-146476 JP 2000-291131 A

  However, in the case of a wall-type reinforced concrete structure that does not have columns and beams and is composed of a wall plate and a floor plate, the wall plate portion and the floor plate are connected to the joint between the wall plate and the floor plate where stress is concentrated (wall floor joint). The concrete which has almost the same strength as the concrete used for the part is only placed on-site, and there is no technology that devised the concrete used for the wall-to-floor joint.

  The object of the present invention is to install a high-strength precast concrete member at the wall-floor joint where stress is concentrated, so that the required large proof stress can be exhibited in the long term even when subjected to seismic force. It is to provide a wall-type reinforced concrete structure and its construction method that are excellent in workability and economy in terms of form, and that can improve the degree of design freedom with respect to the living room space and the building scale.

As means for solving the above-described problems of the prior art, the wall-type reinforced concrete structure according to the invention described in claim 1 is, as shown in FIGS.
In a wall-type reinforced concrete structure 10 composed of a wall plate 1 and a floor plate 2, a precast concrete member 4 made of high-strength concrete is installed at a joint 3 between the wall plate 1 and the floor plate 2, and the precast concrete member 4 and the wall board 1 and the floor board 2 are integrally connected.

  The invention described in claim 2 is the wall-type reinforced concrete structure 10 described in claim 1, wherein the precast concrete member 4 has a square shape whose cross-sectional shape is adapted to the joint portion 3 between the wall plate 1 and the floor plate 2, It is manufactured in a cross shape, a T shape, or an L shape.

  The invention described in claim 3 is the wall-type reinforced concrete structure 10 described in claim 1 or 2, wherein the precast concrete member 4 has a strength that is at least twice that of the concrete used for the wall plate 1 and the floor plate 2. It consists of the high-strength concrete which has.

  The invention described in claim 4 is the wall-type reinforced concrete structure 10 according to any one of claims 1 to 3, wherein the precast concrete member 4 is reinforced by mixing metal or organic / inorganic short fibers. It is characterized by being.

  The invention described in claim 5 is the wall-type reinforced concrete structure 10 according to any one of claims 1 to 4, wherein the precast concrete member 4 includes a wall plate 1 and a floor plate 2 as shown in FIG. A connecting member 5 such as a reinforcing bar 5 or a steel frame is integrally provided so as to project integrally.

  The invention described in claim 6 is the wall-type reinforced concrete structure 10 described in any one of claims 1 to 5, and the precast concrete member 4 includes a wall reinforcement of the wall plate 1 as shown in FIG. 4. Or the through-hole 6 for passing the slab reinforcement of the floor board 2, or the non-through-hole 7 is provided.

  The invention described in claim 7 is the wall-type reinforced concrete structure 10 according to any one of claims 1 to 6, wherein the precast concrete member 4 is composed of a plurality of parts divided in the depth direction, and each of the divided parts is divided. The precast concrete member 4 is characterized by being placed in contact with the adjacent precast concrete member 4.

  The invention described in claim 8 is the wall-type reinforced concrete structure 10 described in any one of claims 1 to 7, wherein the precast concrete member 4 is divided in the depth direction as shown in FIGS. Each of the divided precast concrete members 4 made of a plurality of parts is tightly connected to the adjacent precast concrete members 4.

  The invention described in claim 9 is the wall-type reinforced concrete structure 10 according to any one of claims 1 to 8, and the wall plate 1 is in relation to the floor plate 2 as shown in FIGS. 1 and 2. It is characterized by being installed in a parallel arrangement only in one direction.

  The invention described in claim 10 is the wall-type reinforced concrete structure 10 according to any one of claims 1 to 9, wherein the floor board 2 is a long-span floor board by introducing prestress, or It is characterized by a long-span floor board made of precast concrete reinforced with truss bars.

  The construction method of the wall-type reinforced concrete structure 10 according to the invention described in claim 11 is the construction method of the wall-type reinforced concrete structure constituted by the wall board 1 and the floor board 2 as shown in FIG. A precast concrete member 4 made of high-strength concrete and having a cross-sectional shape of a square shape, a cross shape, a T shape, or an L shape is installed at the joint portion 3 between the wall plate 1 and the floor plate 2, An integral connection with the floor board 2 is performed.

The invention described in claim 12 is the construction method of the wall-type reinforced concrete structure 10 described in claim 11,
At the joint 3 between the wall plate 1 and the floor plate 2, a precast concrete member 4 made of high-strength concrete and having a cross-sectional shape elongated in the horizontal direction, a cross shape, a T shape, or an L shape is installed. In performing the integral connection with the wall board 1 and the floor board 2,
Supporting the horizontal projecting portion 4a of the precast concrete member 4 with the support material 14 of the system mold 15 in which the wall mold 12, the floor mold 13, and the support 14 are integrated;
After the predetermined bar arrangement, ordinary strength concrete is placed on the wall form 12 and floor form 13 of the system form 15, and the precast concrete member 4, the wall board 1 and the floor board 2 are placed. It is characterized by performing an integral connection.

The invention described in claim 13 is the construction method of the wall-type reinforced concrete structure 10 described in claim 11, as shown in FIG.
A precast concrete member 4 made of high-strength concrete and having a vertically elongated cross-sectional shape is installed at the joint 3 between the wall plate 1 and the floor plate 2 so that the wall plate 1 and the floor plate 2 are integrally coupled. In doing so,
A temporary receiving material 22 projecting in the horizontal direction is provided at the lower part of the precast concrete member 4, and the temporary receiving material 22 is a system formwork in which the wall formwork 12, the floor formwork 13 and the support material 14 are integrated. Supporting with 15 support members 14,
After a predetermined bar arrangement, ordinary strength concrete is placed on the wall mold 12 and floor mold 13 of the system mold 15, and then the temporary support material 22 is removed and the precast concrete. The member 4 is integrally connected to the wall plate 1 and the floor plate 2.

The invention described in claim 14 is the construction method of the wall-type reinforced concrete structure 10 described in any one of claims 11 to 13, as shown in FIGS.
A precast concrete member 4 made of high-strength concrete and having a cross-sectional shape of a square shape, a cross shape, a T shape, or an L shape is installed at the joint portion 3 between the wall plate 1 and the floor plate 2, and the wall plate 1 and In performing an integral connection with the floor board 2,
The precast concrete member 4 is connected to the precast concrete member 4 immediately below the end of the connecting member 5 such as a reinforcing bar 5 and a steel frame 5 ′ protruding vertically from the upper and lower precast concrete members 4, 4. By doing so, the wall plate 1 and the floor plate 2 are integrally coupled to each other.

The invention described in claim 15 is the construction method of the wall-type reinforced concrete structure 10 described in claim 11, as shown in FIG.
A precast concrete member 4 made of high-strength concrete and having a cross-sectional shape of a square shape, a cross shape, a T shape, or an L shape is installed at the joint portion 3 between the wall plate 1 and the floor plate 2, and the wall plate 1 and In performing an integral connection with the floor board 2,
The precast concrete member 4 is provided with a connecting member 5 such as a reinforcing bar 5 or a steel frame protruding in the horizontal direction for a required length and a through hole 27 passing through the wall bar 28 of the wall plate 1 in the vertical direction.
Inserting the through hole 27 provided in the precast concrete member 4 into a wall line 28 rising from the existing wall plate 1, and positioning the precast concrete member 4 on the upper surface of the wall plate 1;
The through-hole 27 is filled with a grout material 29 to integrate the precast concrete member 4 and the wall plate 1, and the concrete 30 having a normal strength is placed on the floor portion, so that the precast concrete member 4 and the wall plate 1 are placed. And, it is characterized in that it is integrally coupled with the floor board 2.

According to the wall-type reinforced concrete structure 10 and its construction method according to the present invention, the joint portion (wall-floor joint portion) 3 between the wall plate 1 and the floor plate 2 is stronger than the concrete used for the wall plate 1 and the floor plate 2. Since the precast concrete member 4 is installed and carried out, the strength and shear strength of the wall-floor joint 3 where stress is concentrated are greatly improved, and the following effects are obtained.
I) It is possible to sufficiently fix the slab bars (floor main bars) of the floorboards that are arranged through the wall-floor joints 3. Therefore, even when subjected to seismic force, there is no possibility that the end of the slab bar will come out of the wall-floor joint 3, and the required large proof stress can be exhibited in the long term.
II) The shear design of the wall-floor joint 3 can be easily established. Therefore, even if it receives an earthquake force, there is no possibility that the wall-floor joint 3 is cracked and broken, and the required large proof stress can be exhibited in the long term.
III) It is not necessary to increase the thickness of the wall plate 1 or the floor plate 2 to increase the strength, and it is not necessary to provide a haunch at the wall-floor joint portion 3 or to provide complicated reinforcement. Therefore, it can be implemented in a simple frame format, and is excellent in workability and economy.
IV) There is no need to devise any means to reduce the stress generated in the wall-floor joint 3 by reducing the span of the floor plate 2 or limiting the number of floors of the structure 10, etc. The height of the object 10 can be increased. Further, it is not necessary to dispose a seismic reinforcing wall plate in a direction perpendicular to the wall plate 1. Therefore, the design freedom with respect to the living room space and the building scale can be improved.
V) Since it is not necessary to use high-strength concrete as required for the wall-floor joint 3 in the first place, the high-strength precast concrete member 4 is used only for the wall-floor joint 3. It is extremely reasonable and economical to install.

  1 and 2 show an outline of an implementation of a wall-type reinforced concrete structure 10 according to claim 1. This wall-type reinforced concrete structure 10 is composed of a wall plate 1 and a floor plate 2, and a precast made of high-strength concrete is provided at a joint portion (hereinafter referred to as a wall-floor joint portion) 3 between the wall plate 1 and the floor plate 2. The concrete member 4 is installed, and the precast concrete member 4 and the wall plate 1 and the floor plate 2 are integrally coupled (the invention according to claim 1).

  Incidentally, the wall-type reinforced concrete structure 10 in the illustrated example is composed of a reinforced concrete wall board 1 arranged in the vertical direction and a reinforced concrete floor board 2 arranged in the horizontal direction. It shows a multi-storey apartment.

  For example, the wall plate 1 is formed with a relatively thin width dimension of about 200 to 400 mm by placing concrete in a mold that houses a wall reinforcing bar made up of vertical and horizontal bars. Yes. As an example, the floor board 2 is formed with a relatively thin width of about 200 to 400 mm by placing concrete in a formwork that houses a reinforcing bar for floors assembled with main bars and distribution bars. Yes.

  As shown in FIG. 2, the precast concrete member 4 is variously different depending on the application site of the joint portion 3 between the wall plate 1 and the floor plate (or top plate) 2 in the wall-type reinforced concrete structure 10 to be constructed. The shape is used. Specifically, the precast concrete member 4 shown in FIG. 2 has a depth (about 12 to 14 m) equivalent to the wall plate 1 and the floor plate 2 and a width and thickness (200 to 400 mm), and the cross-sectional shape is a cross shape. , T-shaped, or L-shaped and manufactured. (Invention of Claim 2)

  In addition, the shape of the said precast concrete member 4 is not limited to this, It manufactures and implements rectangular shapes (refer FIG. 5A-C), such as a rectangular shape elongated in the vertical direction, a square shape, and a rectangular shape elongated in the horizontal direction. (Invention of claim 2). Incidentally, the precast concrete member 4 having a square cross-sectional shape shown in FIG. 5B is highly versatile and has an advantage that it can be implemented without being influenced by the application site of the wall-floor joint 3.

The precast concrete member 4 implemented in the various different shapes is preferably made of high-strength concrete having (compression) strength at least twice that of the concrete used for the wall plate 1 and floor plate 2. (Invention of Claim 3). Specifically, high strength concrete of about 270 to 2000 kgf / cm ² is applied to the precast concrete member 4. The precast concrete member 4 made of high-strength concrete can also be implemented by mixing and reinforcing metallic or organic / inorganic short fibers to further improve the concrete strength. Invention).

  As shown in FIGS. 3A to 3C and FIGS. 5A to 5C, the precast concrete member 4 is integrally connected to the wall plate 1 and the floor plate 2 when the wall plate 1 and the floor plate 2 are integrally connected. A connecting member 5 such as a reinforcing bar 5 for projecting is provided (invention according to claim 5). In the illustrated precast concrete member 4, the reinforcing bars 5 are integrally penetrated (or inserted) vertically and horizontally into the precast concrete member 4, but a female screw is formed in the precast concrete member 4. However, it may be carried out by integrating a reinforcing bar having a male screw at the tip into the female screw. Instead of drilling the female screw, it can also be carried out by setting it in advance on the inner surface of the mold of the precast concrete member 4 and placing the concrete integrally therewith. Moreover, the said connection member 5 can also be implemented using steel frames, such as a H-section steel, instead of the said reinforcing bar 5 (or using together) (invention of Claim 5).

  In addition, the precast concrete member 4 passes the wall bars of the wall board 1 or the slab bars of the floor board 2 as shown in FIGS. 4A to C when the wall board 1 and the floor board 2 are integrally coupled. The through-hole 6 or the non-through-hole 7 can be provided (invention of claim 6).

  The through hole 6 (non-through hole 7) is generally formed by driving a so-called sheath tube obtained by processing a thin steel plate, but is not limited thereto. Any technique that can penetrate (or insert) the wall bars of the wall board 1 or the slab bars of the floor board 2 and does not adversely affect the strength of the precast concrete member 4 may be used. For example, the temporary material can be used for forming the hole and the temporary material can be removed after the concrete is cast. In addition, the rectangular precast concrete member 4 as shown in FIG. 5 is similarly provided with a through hole or a non-through hole (not shown) for passing the wall bars of the wall board 1 or the slab bars of the floor board 2. Can be implemented.

  By the way, the length required for the precast concrete member 4 is usually about 12 to 14 m when applied to a general apartment house. In this case, it is difficult to manufacture the precast concrete member 4 as a single object over the entire length of the depth due to transportation problems. Generally, the precast concrete member 4 is manufactured in a factory with a length of about 2 to 3 m and carried into the site site. The most reasonable.

  Therefore, the precast concrete member 4 in the illustrated example is composed of a plurality of pieces divided in the depth direction, and each divided precast concrete member 4 has a length of about 2 to 3 m, and is adjacent to the precast concrete member. 4 (a surface touch) is carried out (invention of claim 7). This is because the individual precast concrete members 4... Are integrally coupled (tightened) by the wall plate 1 and the floor plate 2, so that it is not always necessary that the individual precast concrete members 4 be fastened together. Of course, when high seismic performance and quality are desired, as described below, the individual precast concrete members 4 can be tightly coupled in the depth direction (the invention according to claim 8).

  FIG. 6 shows an embodiment in the case where the individual precast concrete members 4 are bonded in the depth direction. Incidentally, in the illustrated example, the precast concrete member 4 having the shape shown in FIG. 5B is used. As shown in FIG. 6A, this binding method is such that four reinforcing bars 8 arranged in advance in a well-balanced manner on individual precast concrete members 4 having a length of about 2 to 3 m in the depth direction are projected in the depth direction. Provided, the ends of the corresponding individual reinforcing bars 8 are fastened together by a joining means such as welding. Thereafter, as shown in FIG. 6B, the connecting members 5 such as reinforcing bars are arranged vertically and horizontally in the gaps between the precast concrete members 4 and 4, and concrete 9 is filled.

  The means for binding the reinforcing bars 8 may be implemented by a known mechanical joint (including a threaded reinforcing bar) or by a reinforcing joint method that does not involve upsetting of the reinforcing bars during welding. Of course, the number of reinforcing bars 8 used is not limited to four. Moreover, it can implement substantially similarly about the precast concrete members 4 (refer FIG. 3 and FIG. 5) other than the precast concrete member 4 of the shape shown to FIG. 5B. Furthermore, not only when the precast concrete members 4 having the same shape are connected to each other, but also according to the shape and layout of the structure to be constructed, the precast concrete members having different shapes such as a square shape, a cross shape, a T shape, and an L shape. It can also be carried out by tightly connecting the four.

  FIG. 7 shows a different embodiment in the case where the individual precast concrete members 4 are bonded in the depth direction. Incidentally, also in this illustrated example, the precast concrete member 4 having the shape shown in FIG. 5B is used. As shown in FIG. 7, this binding method is manufactured by driving the sheath tube 10 in advance in the depth direction of each precast concrete member 4 and passing the PC steel material 11 through the sheath tube 10 to tension it. The individual precast concrete members 4 are bonded to each other by the tension of the PC steel material 11.

  In addition, the said PC steel material 11 can also be implemented using multiple pieces. The PC steel material 11 and the sheath tubes 1 and 0 can be carried out by being fixed by filling with grout, or can be carried out as unbonding without filling with grout. Moreover, it can implement substantially similarly about the precast concrete members 4 (refer FIG. 3 and FIG. 5) other than the precast concrete member 4 of the shape shown to FIG. 5B. Furthermore, not only when the precast concrete members 4 having the same shape are connected to each other, but also according to the shape and layout of the structure to be constructed, the precast concrete members having different shapes such as a square shape, a cross shape, a T shape, and an L shape. It can also be carried out by tightly connecting the four.

  Therefore, according to the wall-type reinforced concrete structure 10 having the above-described configuration, since the precast concrete member 4 having higher strength than the concrete used for the wall plate 1 and the floor plate 2 is installed at the wall floor joint portion 3, the stress is increased. The strength and shear strength of the concentrated wall-to-floor joint 3 are greatly improved.

  Therefore, it is possible to sufficiently fix the slab reinforcement (floor main reinforcement) of the floor board that is arranged through the wall-floor joint 3 and the end portion of the slab reinforcement is the wall even when subjected to seismic force. There is no risk of slipping out of the floor joint 3, and the required great strength can be exhibited in the long term. Further, the shear design of the wall-floor joint 3 can be easily established, and even when subjected to seismic force, there is no risk of the wall-floor joint 3 being cracked and broken, and it is necessary for a long term. Exhibits great strength. Further, it is not necessary to increase the thickness of the wall plate 1 or the floor plate 2 to increase the strength, and it is not necessary to provide a haunch at the wall-floor joint 3 or to provide complicated reinforcement. Therefore, it can be implemented in a simple frame format and is excellent in workability and economy.

  Further, according to the wall-type reinforced concrete structure 10, as a secondary effect, the stress generated in the wall-floor joint 3 is reduced by reducing the span of the floor plate 2 or restricting the number of floors of the structure 10. There is no need to devise, and it is possible to increase the span of the floor plate 2 and increase the height of the structure 10. Further, it is not necessary to dispose a seismic reinforcing wall plate in a direction perpendicular to the wall plate 1, and the wall plate 1 can be installed in parallel with the floor plate 2 only in one direction. (Invention of Claim 9).

  In addition, although illustration is abbreviate | omitted, in order to implement | achieve the long span of the said floor board 2, in order to implement safely and reliably, the floor board of a long span is introduced by introduce | transducing pre-stress to the said floor board 2, etc. Or a long-span floor board made of precast concrete reinforced with truss bars or the like (the invention according to claim 10).

  The wall-type reinforced concrete structure 10 having the above-described configuration has a rectangular cross section (FIGS. 5A to 5C), a cross shape (FIG. 3A), and a T-shape by using high-strength concrete at the joint between the wall plate 1 and the floor plate 2. (FIG. 3B), or a precast concrete member 4 manufactured in an L shape (FIG. 3C) is installed and constructed by integrally connecting the wall plate 1 and the floor plate 2 (the invention according to claim 11). ). Hereinafter, the construction method of the wall-type reinforced concrete structure 10 having the above configuration will be specifically described.

FIG. 8 shows a construction method of the wall-type reinforced concrete structure 10.
In this construction method, a precast concrete member 4 having a cross-sectional shape made of high-strength concrete is installed at a joint 3 between a wall plate 1 and a floor plate 2 to be constructed, and the wall plate 1 and the floor plate 2 are integrated. For the purpose of jointing, the horizontal projecting portion 4a of the precast concrete member 4 is placed on the floor board 2 on which a concrete having a normal strength is cast to express a required strength, and for the wall form 12 and the floor. After the formwork 13 and the support material 14 are supported by the support material 14 of the system formwork 15 and a predetermined bar arrangement is made, the wall formwork 12 and the floor mold of the system formwork 15 are provided. Normal strength concrete is placed on the frame 13 so that the precast concrete member 4 and the wall plate 1 and the floor plate 2 are integrally coupled (invention of claim 12).

  In the illustrated example, the cross-sectional shape is implemented by the precast concrete member 4 manufactured in a cross shape. However, the present invention is not limited to this, and the horizontal shape has a protruding portion 4a, a horizontally elongated rectangular shape, and a T-shape. Alternatively, the present invention can be carried out in substantially the same manner with an L-shape (the invention according to claim 12). Incidentally, reference numeral 16 in FIG. 8 is a jack for adjusting the span of the wall mold 12, reference numeral 17 is a telescopic beam, reference numeral 18 is a wheel movable in the vertical direction, and reference numeral 19 is a height of the support member 14. A jack for adjusting the height, reference numeral 20 denotes an auxiliary wheel for movement.

  The precast concrete member 4 (the protruding portion 4a thereof) is supported by the support material 14 of the system mold 15 and is positioned at a predetermined position by adjusting a jack 19 provided at the lower end of the support material 14. . The wall mold 12 is positioned at a predetermined position by adjusting a horizontal jack 16 fixed to the support member 14. After performing the required bar arrangement in this state, the wall plate 1 is constructed by press-fitting normal-strength wall concrete from a concrete pressure inlet (not shown) provided in the vicinity of the lower portion of the wall form 12, The floor board 2 is constructed by placing the concrete for floor with normal strength on the floor form 13.

  Then, after the wall concrete and floor concrete exhibit the required concrete strength, the system formwork 15 is disassembled leaving only the support material 14 in the center, and diverted to construction on the upper floor.

  When the system mold 15 is disassembled, the jacks 16 and 19 attached to the support material 14 of the system mold 15 are loosened, the entire system mold 15 is jacked down, and the wall mold 12 is moved to the wall plate (wall concrete). Pull away from 1. Then, the wheel 18 is set, and the system formwork 15 is moved in the depth direction of the wall-type reinforced concrete structure 10 and carried out.

  As shown in FIG. 5A, in the case of using the precast concrete member 4 having a rectangular shape elongated in the vertical direction and having no protruding portion 4a in the horizontal direction, as shown in FIG. The provisional receiving material 22 projecting in the horizontal direction is provided at the lower part of 4, and almost the same process as described above is performed. That is, the temporary support material 22 is supported by the support material 14 of the system formwork 15, and after placing a predetermined reinforcement, a concrete having a normal strength is placed. After the concrete exhibits a required strength, the temporary support material 22 is placed. The receiving material 22 is removed, and the precast concrete member 4 and the wall plate 1 and the floor plate 2 are integrally coupled (the invention according to claim 13).

  The precast concrete member 4 is positioned by supporting it with the support material 14 of the system mold 15 and, as shown in FIG. 10, protrudes vertically from the upper and lower precast concrete members 4 and 4. The ends of the reinforcing bars 5 and 5 can be tightly bonded 23, and the upper precast concrete member 4 can be supported by the lower precast concrete member 4 (invention of claim 14).

  The fastening means can be a general mechanical joint such as a sleeve / grouting filling joint or a threaded joint using threaded reinforcing bars, or a welded joint. Except for the reinforcing bars 5 necessary for safely supporting the vertical load of the precast concrete member 4, a normal lap joint may be used. Depending on the diameter of the reinforcing bars 5 and the weight of the precast concrete member 4, the precast concrete members 4 can be supported by a total of four reinforcing bars 5. When the length of the precast concrete member 4 in the depth direction exceeds about 2 to 3 m, the reinforcing steel 5 group is arranged at intervals of about 2 to 3 m to support the precast concrete member. Thus, after the support / fixation of the precast concrete member 4 is completed, the wall formwork and the floor formwork are arranged, the required reinforcement is placed, and the normal strength concrete is placed.

  As described above, when the upper precast concrete member 4 is supported by the lower precast concrete member 4, the precast concrete can be installed with the support material 24 for preventing the fall without using the system formwork 15. The member 4 and the wall plate 1 and the floor plate 2 can be integrally coupled. Of course, the system mold 15 can be used.

  FIG. 11 shows a different embodiment of the method for positioning the precast concrete member 4. In this embodiment, a steel frame 5 ′ is used instead of the reinforcing bar 5. That is, the ends of the steel frames 5 ′ and 5 ′ protruding in the vertical direction from the upper and lower precast concrete members 4 and 4 are fastened together by a joining means such as a bolt 25, and the upper precast concrete member 4 is connected to the lower precast concrete member 4. (The invention according to claim 14). Thus, after the support and fixing of the precast concrete member 4 are completed, the wall formwork and the floor formwork are arranged, the necessary reinforcement is placed, and the normal strength concrete is placed.

  In the illustrated example, the steel frame 5 ′ is formed by driving a small and light H-shaped steel into the precast concrete member 4, but of course, it can also be performed with an I-shaped steel, a grooved steel, an angle steel, and a lip grooved steel. . Thereby, since the precast concrete member 4 for 2-3 layers can be built at once, without placing concrete of a wall part, construction efficiency and construction speed improve significantly. In this case, the support material 24 for preventing the fall, which was necessary when using the rebar 5, is no longer necessary, and it is sufficient to support it with a light retaining wire 26 for fail-safe (assuring safety). The steel frame 5 ′ can support the precast concrete member 4 by a total of two steel frames 5 ′ with respect to the precast concrete member 4 having a length of about 2 to 3 m. When the length of the precast concrete member 4 in the depth direction exceeds about 2 to 3 m, the steel frame 5 ′ is arranged at intervals of about 2 to 3 m to support the precast concrete member 4.

  As described above, when the upper precast concrete member 4 can be supported by the lower precast concrete member 4, a light safety wire 26 for fail-safe (safety) can be provided without using the system formwork 15. The precast concrete member 4 and the wall plate 1 and the floor plate 2 can be integrally coupled to the extent that they are installed. Of course, the system mold 15 can be used.

  FIG. 12 shows different embodiments of the construction method of the wall-type reinforced concrete structure 10.

In this construction method, a precast concrete member 4 having a square cross section made of high-strength concrete is installed at a joint 3 between a wall plate 1 and a floor plate 2 to be constructed, and the wall plate 1 and the floor plate 2 are integrated. In performing a dynamic combination,
The precast concrete member 4 is provided with a connecting member 5 such as a reinforcing bar or a steel frame protruding in the horizontal direction for a required length, and a through hole 27 for passing the wall reinforcing bar 5 of the wall plate 1 in the vertical direction. A through hole 27 provided in the precast concrete member 4 is inserted into a wall line 28 rising from the wall plate 1 (which has been developed with a normal strength concrete and has a required strength), and the precast concrete member 4 is inserted into the wall plate 1. Is positioned on the upper surface (FIGS. 12A to 12C). At this time, the precast concrete member 4 and the upper surface of the wall plate 1 are preferably provided with a joint margin for grout filling of about 10 to 20 mm.

  The pre-cast concrete member 4 and the wall plate 1 are integrated by filling the through hole 27 with a grout material 29. Then, as shown in FIG. 12D, the required floor reinforcement is performed and the floor concrete 30 with normal strength is placed to integrally connect the precast concrete member 4 with the wall plate 1 and the floor plate 2 (the above, The invention according to claim 15). After performing the required curing, the system formwork 21 is replaced, and the precast concrete member 4 on the next upper floor, and the wall plate 1 and the floor plate 2 are integrally joined (FIG. 12E).

  In addition, the reinforcing bars 5 (or the connecting members 5 such as steel frames) provided in advance on the precast concrete member 4 are projected so as to project the length necessary for fixing. The horizontal coupling member may be driven on both sides or one side as required. In addition, the through hole 27 is generally formed by driving a so-called sheath tube obtained by processing a thin steel plate, but is not limited thereto. Any technique that can penetrate the wall bars 28 and does not adversely affect the strength of the precast concrete member 4 may be used. For example, in order to form a through-hole, the temporary material can be used after removing the temporary material after placing the concrete.

  The embodiments have been described with reference to the drawings. However, the present invention is not limited to the illustrated examples, and includes a range of design changes and application variations that are usually made by those skilled in the art without departing from the technical idea thereof. I will mention that just in case.

  For example, with respect to the wall-type reinforced concrete structure 10 and its construction method, it is not necessary to install precast concrete members 4 having equivalent strength at all wall floor joints 3. The member stress due to the external force generated in the wall plate 1 and the floor plate 2 is not uniform, and is larger as the wall plate 1 and the floor plate 2 in the lower floor and smaller as the wall plate 1 and the floor board 2 in the upper floor. Therefore, what is necessary is just to install the precast concrete member 4 of the intensity | strength which satisfy | fills the structure design requested | required minimum according to each hierarchy and installation site | part. Moreover, the precast concrete member 4 tightly connected in the depth direction and the precast concrete member 4 contacted in the depth direction in series can be combined.

  Furthermore, although the span of the floor board 2 of the wall-type reinforced concrete structure 10 is implemented by the same space | interval, as shown in FIG. 1, it is not limited to this. By adjusting the concrete strength of the precast concrete member 4, the shear (cross-section) design of the wall-floor joint 3 can be easily performed. As shown in FIGS. 13A to 13D, a variation in which a short span and a long span are combined. It is possible to realize the wall-type reinforced concrete structure 10 which is rich in the thickness. Further, as shown in FIG. 14A, the outer peripheral portion of the wall-type reinforced concrete structure 10 can be carried out in the same plane as seen in the plane direction, or in the plane direction as shown in FIGS. 14B and 14C. Seeing can also be carried out in lame form.

It is the perspective view which showed roughly the frame format of the wall-type reinforced concrete structure which concerns on this invention. It is the perspective view which expanded and showed the code | symbol A part of FIG. A to C are front views showing various different embodiments of the shape of the precast concrete member. A to C are front views showing various different embodiments of the shape of the precast concrete member. A to C are front views showing various different embodiments of the shape of the precast concrete member. A and B are perspective views showing in stages a method of binding individual precast concrete members connected in the depth direction. It is the perspective view which showed the different fastening method of the individual precast concrete member which continues in a depth direction. It is the front view which showed the Example of the construction method of the wall-type reinforced concrete structure which concerns on this invention. It is the front view which showed the Example from which the construction method of the wall-type reinforced concrete structure which concerns on this invention differs. It is the front view which showed the Example from which the construction method of the wall-type reinforced concrete structure which concerns on this invention differs. It is the front view which showed the Example from which the construction method of the wall-type reinforced concrete structure which concerns on this invention differs. AE is the front view which showed the Example from which the construction method of the wall-type reinforced concrete structure which concerns on this invention differs in steps. AD is the schematic which showed the variation of the wall-type reinforced concrete structure which concerns on this invention, respectively. A, B, and C are schematic views showing variations of the wall-type reinforced concrete structure according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wall board 2 Floor board 3 Wall floor joint part 4 Precast concrete member 5 Reinforcement (joint member)
5 'Steel frame 6 Through hole 7 Non-through hole 8 Reinforcement 9 Concrete 10 Sheath tube 11 PC steel 12 Wall form 13 Floor form 14 Support material 15 System form 16 Jack 17 Extendable beam 18 Wheel 19 Jack 20 Movement Time auxiliary wheel 21 System form 22 Temporary receiving material 23 Tightening means 24 Support material 25 Bolt 26 Wire 27 Through hole 28 Wall reinforcement 29 Grout material 30 Floor concrete

Claims (15)

  In a wall-type reinforced concrete structure composed of a wall board and a floor board, a precast concrete member made of high-strength concrete is installed at a joint between the wall board and the floor board, and the precast concrete member, the wall board and the floor board are A wall-type reinforced concrete structure characterized by being integrally joined.   The pre-cast concrete member is manufactured in a square shape, a cross shape, a T-shape, or an L-shape whose cross-sectional shape is adapted to a joint portion between a wall plate and a floor plate. Wall reinforced concrete structure.   The wall-type reinforced concrete structure according to claim 1 or 2, wherein the precast concrete member is made of high-strength concrete having a strength twice or more than that of the concrete used for the wall plate and the floor plate.   The wall-type reinforced concrete structure according to any one of claims 1 to 3, wherein the precast concrete member is reinforced by mixing metallic or organic / inorganic short fibers.   The wall according to any one of claims 1 to 4, wherein the precast concrete member is provided with a connecting member such as a reinforcing bar or a steel frame that is integrally connected to the wall plate and the floor plate. Reinforced concrete structure.   The precast concrete member is provided with a through-hole or a non-through-hole for passing a wall reinforcement of a wall board or a slab reinforcement of a floor board, according to any one of claims 1 to 5. Wall type reinforced concrete structure.   The precast concrete member includes a plurality of divided precast concrete members, and each divided precast concrete member is installed in contact with an adjacent precast concrete member. The wall-type reinforced concrete structure described in any one of the above.   The precast concrete member is composed of a plurality of pieces divided in the depth direction, and each divided precast concrete member is tightly coupled to an adjacent precast concrete member. The wall-type reinforced concrete structure described in 1.   The wall-type reinforced concrete structure according to any one of claims 1 to 8, wherein the wall board is installed in an arrangement parallel to the floor board only in one direction.   The floor board is a long-span floor board introduced with pre-stress, or a long-span floor board made of precast concrete reinforced with truss bars or the like. The wall-type reinforced concrete structure described in any one.   In the construction method of a wall-type reinforced concrete structure composed of a wall board and a floor board, the cross-sectional shape is made of high-strength concrete at the joint between the wall board and the floor board, a square shape, a cross shape, a T shape, or an L shape. A construction method for a wall-type reinforced concrete structure, characterized in that a precast concrete member manufactured in a shape is installed and integrally connected to a wall board and a floor board. At the joint between the wall board and the floor board, a precast concrete member made of a high-strength concrete with a cross-sectional shape that is elongated in the horizontal direction, a cross shape, a T-shape, or an L-shape is installed. When performing an integral connection with
Supporting the horizontal projecting portion of the precast concrete member with the support material of the system formwork in which the wall formwork and the floor formwork and the support material are integrated;
After carrying out predetermined bar arrangement, placing concrete of normal strength on the wall formwork and floor formwork of the system formwork, and integrally connecting the precast concrete member with the wallboard and floorboard. The construction method of the wall-type reinforced concrete structure according to claim 11, characterized in that: At the joint between the wall board and the floor board, a precast concrete member made of a high-strength concrete with a vertically elongated cross-sectional shape is installed and integrated with the wall board and floor board.
A temporary receiving material protruding in the horizontal direction is provided at the bottom of the precast concrete member, and the temporary receiving material is supported by the support material of the system formwork in which the wall formwork and the floor formwork and the support material are integrated. To do,
After carrying out the predetermined bar arrangement, normal-strength concrete is placed in the wall formwork and floor formwork of the system formwork, and then the temporary support material is removed and the precast concrete member and the wallboard The method for constructing a wall-type reinforced concrete structure according to claim 11, wherein the wall-type reinforced concrete structure is integrally connected to the floor board. Precast concrete members made of high-strength concrete in a square shape, cross shape, T shape, or L shape are installed at the joint between the wall plate and the floor plate, so that the wall plate and the floor plate are integrated. In performing the combination,
The precast concrete member is supported by bonding the ends of connecting members such as reinforcing bars and steel frames protruding vertically from the upper and lower precast concrete members to the precast concrete member immediately below the precast concrete member. The method for constructing a wall-type reinforced concrete structure according to any one of claims 11 to 13, wherein the wall-type reinforced concrete structure is integrally connected to the floor board. Precast concrete members made of high-strength concrete in a square shape, cross shape, T shape, or L shape are installed at the joint between the wall plate and the floor plate, so that the wall plate and the floor plate are integrated. In performing the combination,
The precast concrete member is provided with a connecting member such as a reinforcing bar or steel frame protruding in the horizontal direction to a required length and a through hole passing through the wall bar of the wall plate in the vertical direction.
Inserting the through hole provided in the precast concrete member into a wall line rising from an existing wall plate, and positioning the precast concrete member on the upper surface of the wall plate;
The through-hole is filled with a grout material to integrate the precast concrete member and the wall plate, and a normal strength concrete is placed on the floor portion, and the precast concrete member, the wall plate and the floor plate are integrally coupled. The construction method for a wall-type reinforced concrete structure according to claim 11, wherein:

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