JP2019100057A - Construction method of wooded/rc mixed structure building and wooden/rc mixed structure building - Google Patents

Abstract

To build a construction method that can shorten the construction period when combining wooden and RC structures.SOLUTION: In a construction method of building which unified a wooden structure part and an RC structure part, the construction method which precedes construction of frame construction of the wooden construction part and follows the construction of the RC structure part, in which at the junction of the wooden frame and RC frame, after arranging the anchor provided in the wooden frame in the concrete placing space, the concrete is placed and hardened in the placing space, and then construct a mixed structure of the wooden structure and RC structure.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a technology for constructing a building in which a wooden structure and an RC structure (reinforced concrete structure) are combined.

It is common to construct an RC part in advance and then build a wooden part, as seen in foundation concrete, etc., for a structure connecting a wooden structure and an RC structure.
For example, in Patent Document 1 (Japanese Patent No. 2676128), while building a first floor portion which becomes a part or all of an RC structure on a building foundation, it is possible to set two floors on a concrete slab above the RC structure. The building which constructs the wooden structure which is a floor part is disclosed. The concrete structure needs a period of time for setting and setting concrete, and after that period, the next process will be advanced.
In the wake of the “Law on the Promotion of the Use of Wood in Public Buildings, etc.,” which came into effect in 2010, expectations for improved use of wood have increased in recent years. The office building, commercial facilities, etc. by CLT utilization by which the announcement about the Japanese agroforestry standard and the design method etc. of cross laminated timber (CLT: Cross Laminated Timber) is issued, and dimensional stability, high strength, heat insulation etc. are improved. Attention has been focused on making wooden buildings and buildings known as non-residential buildings. Overseas, CLT (Cross Laminated Timber) is increasing in use mainly in Europe, and various buildings are built from medium to large-scale facilities and 6 to 10-storey housing complexes. On the other hand, in Japan, applications to large-scale buildings are being considered, including earthquake countermeasures.
CLT is an abbreviation of Cross Laminated Timber (Cross Laminated Timber), and is a thick panel in which layers of a board are laminated and bonded so as to be orthogonal to each other. It was enacted on December 20, 2013 as the Japan Agriculture and Forestry Standard (JAS) with the name of orthogonal laminated board, and enforced on January 19, 2014. In the conventional laminated materials, the fiber directions of the plates to be laminated are laminated in parallel directions, while the CLT is different in that the fiber directions are laminated alternately so that the fiber directions are orthogonal. CLT is being considered for use shortly after the plan is established.
Since the wood is precut in the factory according to the design and assembled on site, the on-site construction is short. In addition, wood is lightweight and has high thermal insulation, and a 10 cm thick CLT has a thermal insulation performance of about 1.2 m thick concrete. In the fire area and the room blocked by CLT, the temperature change is barely felt. And, since CLT is about 1/4 to 1/5 the weight of concrete, it is also effective for earthquake response. CLT is manufactured, for example, by laminating plate members having a thickness of 3 cm. For example, a material having a thickness of 21 cm, a width of 3 m, and a length of about 8 m is used. As for CLT, 3, 5, 7 and 9 layers are common with 3 cm as a unit layer.
It is also possible to design a framework that uses columns and beams and CLT for floors and walls, and CLT as a structural material, using walls and floors CLT without using columns and beams.

Patent No. 2676128 gazette

  An object of the present invention is to develop a construction method capable of shortening a construction period when constructing by combining wooden and RC structures.

In the present invention, it is possible to construct a wooden structure without delaying the period of placing and curing concrete by constructing the wooden structure first and then constructing the RC structure, thereby shortening the whole construction process. Provide a method of constructing RC mixed structure building.
The main configurations of the present invention are as follows.
1. In the construction method of the building which unified the wooden structure part and the RC structure part,
It is a construction method of constructing in advance the construction of the wooden construction part and following the construction of the RC construction part,
At the joint between the wooden frame and RC frame, an anchor provided on the wooden frame is placed in the concrete placing space, then concrete is placed in the placing space and hardened to mix the wooden structure and the RC structure. A method of constructing a wooden / RC mixed structure that is characterized by constructing a structural building.
2. A joint portion of the wooden frame is a floor or a floor and a beam. How to build a wooden / RC mixed structure as described in
3. A joint portion of the wooden frame is a base end portion of the column, and a joint portion of the RC frame is an RC foundation or an RC foundation beam. Or 2. How to build a wooden / RC mixed structure as described in
3-2 The construction to which the frame construction of the wooden construction part precedes construction and the construction method which applies the construction method to follow the construction of the RC structure part is the circumference of the junction of the wooden construction and the RC construction Characteristic 1. ~ 3. The construction method of the wooden and RC mixed structure construction according to any of the above.
3-3 characterized in that the building has a multi-layered structure. ~ 3. The construction method of the wooden and RC mixed structure construction according to any of the above.
3-4 characterized in that the construction which precedes the frame construction of the wooden construction part and the construction which follows the construction of the RC structure part are repeatedly performed for each layer or / and each layer 1. ~ 3. The construction method of the wooden and RC mixed structure construction according to any of the above.
3-5 The wooden structure part is characterized in that the columns, beams and floor are made of wood. ~ 3. The construction method of the wooden and RC mixed structure construction according to any of the above.
4. It is characterized in that CLT (Cross Laminated Timber) is used for the floor of the wooden construction part. ~ 3. The construction method of the wooden and RC mixed structure construction according to any of the above.
5. The RC structure part is disposed on the inner side of the building 1. ~ 4. The construction method of the wooden and RC mixed structure construction according to any of the above.
5-2 The RC structural portion is a core of a building, and one or more are arranged. To 5. The construction method of the wooden and RC mixed structure construction according to any of the above.
6. It is characterized in that CLT (Cross Laminated Timber) is used as a formwork material for constructing a joint portion of an RC structure portion. To 5. The construction method of the wooden and RC mixed structure construction according to any of the above.
7. 5. The form material forming the RC structure portion is a residual form frame. How to build a wooden / RC mixed structure as described in
8. It is characterized in that a formwork material constructing an RC structure portion is a temporary earthquake-proof wall when a wooden portion is erected. Or 7. How to build a mixed wooden / RC building structure as described.
8-2 The construction of the joint between the wooden frame and the RC frame is characterized in that the wooden frame directly faces the RC frame placement space. To 8. The construction method of the wooden and RC mixed structure construction according to any of the above.
9. A wooden frame portion provided with an anchor disposed in the concrete placing space is characterized in that it is directly in contact with concrete without providing a formwork. To 8. The construction method of the wooden and RC mixed structure construction according to any of the above.

10. A wooden / RC mixed structure in which a wooden structure part and an RC structure part are integrated, and characterized by comprising a joint part in which the wooden structure part and the RC structure part are in direct contact with each other in the vertical direction. Wooden / RC mixed structure building.
11. The floor material which constitutes a wooden structure part is characterized by being CLT. Wooden / RC mixed structure building described.

1. The present invention provides an RC structure by constructing a wooden part in advance at least at the joint between the wooden structure and the RC structure in the construction of a wooden / RC mixed structure in which the wooden structure part and the RC structure part are integrated. Construction can proceed without waiting for the placement and curing period of concrete at the time of construction, so that the construction period can be shortened accordingly.
For wooden parts, wood-based materials can be used for structural materials such as beams, columns, walls and floors.
Wood is lighter than concrete, is higher in heat insulation, and can be used to construct a lightweight building by using a material such as CLT having a large load resistance. As the weight is reduced, earthquake countermeasures also become easier. And since it is a renewable material, carbon dioxide emissions are also extremely small.
The application of the present invention is applicable to multi-story buildings, in particular to middle floors. The construction method can be performed for each hierarchy or every several floors.
The construction material of the wooden part is treated with fireproofing and flameproofing.
2. At the joint between the wooden frame and the RC frame, an anchor provided on the wooden frame is placed in the concrete placing space, and then concrete is placed and hardened in the concrete placing space, and the wooden structure and the RC structure By building a mixed structure, the concrete hardens into the anchor set from the wooden side, so it takes time and effort to adjust the joint position of the wooden side to the anchor provided on the hardened concrete in the usual way Absent.
The anchor means includes various means such as bolts, plate-like hardware, supports on the jaws on the RC side, structures for extending (penetrating) beams to the RC side, and structures for combing the floor and extending to the RC side. is there.
Depending on the tolerance of wooden construction and RC construction and the construction accuracy, the alignment at the time of joining of wooden construction and RC takes time, but in the present invention, it can be decided only by the anchor on the wooden side.
3. Bonding of wooden construction and RC construction has an opposing vertical direction and an opposing horizontal direction. That is, the main joint portion is the joint portion of the wooden frame, which is a floor or floor and a beam, and the RC structure is a wall of a core, a column, a floor and a beam to form a joint structure facing in the vertical direction. Moreover, it is set as the junction structure of the up-down direction by joining to RC foundation and a low-layer RC layer by making the connection part by the side of a wooden into a pillar base end part.
Furthermore, since the joint part of the wooden part can be used as long as it can be anchored to secure joint strength, it is possible to use pillars, wall materials, roofing materials, etc. without being limited to floors and beams.
4. The leading wooden part can be advanced as a joint with the RC construction, and the other parts of the wooden to be expanded can be advanced after the execution of the joint. Safety can be improved because the high-strength RC part can be used as a temporary support for the wooden part to be expanded.
5. By using thick and strong CLT (Cross Laminated Timber) for the floor of the wooden construction part, one floor unit several meters wide and 10 meters long can be used without using a lot of small beams etc. CLT can be used to simplify the processing structure and reduce the construction time. By using a strong and thick CLT as a floor material, it can be joined to the floor on the RC side at the floor level, so a long anchor material can be used, and even if it is a floor material joint, the joint strength Can be improved. In particular, when the RC portion has a wall structure without RC columns, such as an elevator hall or a stairway, the thickness of the wall may not be sufficient for fixing the anchor bolt, but the floor level may be RC Since the construction is the same, a sufficient distance for anchoring can be secured by using both.
When an RC column is provided in the RC construction part, not only the floor material of the wooden part but an anchor can be installed from a beam. When taking out an anchor from a wooden beam, the anchor can be hit up and down by the height of the beam.
6. Although the positional relationship between the RC part and the wooden part is not particularly defined, the RC part is mainly excellent in the function as a core, and the wooden part is suitable as an office or a living space. As a core, it is suitable to arrange RC structure in the middle part or middle part, and when strength is expected from RC, it is suitable to arrange RC structure in the middle or middle part also in planar arrangement and upper and lower penetration arrangement ing.
7. The use of CLT, which has higher strength than plywood for concrete, as a formwork material to construct the joint part of the RC structure part simplifies the formwork support work and also opens the wooden frame of the joint part in a cantilever state. It can be made to function as a temporary construction material supporting the end side, and it also becomes a temporary installation wall. Furthermore, it is possible to leave the CLT form material as it is as a wall material or a finished wall material by leaving it as it is without removing it. In particular, since the concrete material has low heat insulation, leaving CLT excellent in heat insulation temperature although it is low temperature or high temperature can reduce the air conditioning load on the living room or office side, and can keep the living environment comfortable.
8. Since an anchor is taken out from the wooden side and concrete is cast, a wooden frame such as a floor or a beam on the wooden side directly faces the concrete placing space. As a result, floors and beams come into direct contact with the cast concrete. In particular, it is possible to provide the joining anchor on the floor portion thinner than the beam only because the anchor is fixed to the floor material on the wooden side. If the anchor is fixed on the RC side and adjusted on the wooden side, there is a possibility that the thickness of the floor can not be adjusted. Therefore, since the anchor is fixed on the wooden side, the wooden part can be in direct contact with the RC part. In particular, the anchored joint structure in the floor material portion has been specifically realized in the present invention.
9. The wooden / RC mixed structure construction of the present invention comprises a joint where the wooden construction part and the RC construction part are in direct contact with each other. In particular, it is a wooden / RC mixed construction structure in which the floor materials on the CLT side and the RC side are joined by joining anchors.

Figure showing a frame model of a wooden / RC mixed structure A figure showing an example of a plan of a wooden / RC mixed structure building The figure which shows the example of arrangement of the floor panel of the wooden and RC mixed structure building Figure showing an example of the elevation of the structure of the wooden core and RC core The figure which shows the example of the wooden construction of the floor unit part and the plane of the RC construction connection structure The figure which shows the example of the elevation of the wooden construction and RC construction part structure The figure which shows the example of the elevation of the beam-to-beam connection structure of the wooden part Diagram showing construction process outline (wooden part precedent construction) Basic construction process chart 1F wooden construction process map 2F floor wooden construction process map Elevated view from the RC side in Figure 9c Finish wooden construction / RC part formwork construction process chart RC section Concrete placing and curing process chart RC part form removal process drawing Diagram showing casting method by hierarchy Figure which shows example of wooden pillar precedence, RC foundation beam behind construction Figure showing an example of joint construction precedent of wooden and RC construction Diagram showing an example of mixed structure using RC columns RC center core method Figure which shows wooden, RC mixed structure building standard floor plan Figure showing an example of a lower layer RC / wooden / RC core composite structure

The present invention is a construction method suitable for a wooden / RC mixed structure constructed by combining a wooden structure and an RC structure (reinforcing steel structure), and the wooden / RC mixed structure provided with a unique structure constructed by this construction method It is a building.
In RC construction, it is necessary to construct reinforcement and formwork, put concrete in it, and cure it. On the other hand, since wood is generally pre-cut and assembled on site, no interruption period such as curing of concrete is necessary, and construction speed of wood and RC construction does not proceed in the same way. In particular, in a construction where it is necessary to connect a wooden structure and an RC, in the construction of the connection portion, the concrete casting and curing periods become interruption periods, and the construction period is extended.
Furthermore, in the case of bringing out the connection anchor from the RC construction side to the wooden side, since the anchor is fixed, it is necessary to align the anchor on the wooden side, which makes adjustment difficult.

In the present invention, a wooden is preceded and constructed, an anchor is provided on the wooden side, the anchor is disposed in a concrete placing space of RC construction, and concrete is cast and cured in the placement space Is to be installed behind the scenes. By this construction procedure, wooden construction can be promoted regardless of construction period of RC. And, if an anchor is provided on the wooden side and placed in the casting space before concrete is cast, it is considered that the connection adjustment work of the anchor becomes unnecessary.
That is, in the construction method of the building in which the wooden structure part and the RC structure part are integrated, the present invention is constructed by performing the construction of the wooden construction part ahead of the construction of the wooden construction part and following the construction of the RC structure part. In the method, after the anchor provided on the wooden frame is disposed in the concrete placing space at the joint between the wooden frame and the RC frame, concrete is placed and hardened in the concrete placing space, and the wooden structure is constructed. It is a construction method of the wooden and RC mixed structure building which builds the mixed structure building of and the RC structure. The wooden part can be assembled in a few days, and it is possible to eliminate the unbalance with concrete placement and curing necessary for RC construction.
Elimination of unbalance reduces the time for arranging and restraining workers as well as shortening the construction period.

<About a mixed structure of wooden structure and RC structure>
1, 2, 3 and 4 show an example of the basic structure of a mixed structure of a wooden structure and an RC structure.
A mixed structure 100 of a wooden structure and an RC structure is shown in FIG.
A mixed structure 100 of a wooden structure and an RC structure is composed of a concave wooden portion 1 and an RC structure portion 5 which is constructed to be fitted into a recess portion. In this example, the RC part 5 is also the core 6. Floor 2 and pillar 3 of wooden part 1 are wooden. The mixed structure 100 is constructed on a reinforced concrete foundation 7.
FIG. 2 is an example of a plan view of the mixed structure 100.
Because the wooden part and the RC core are in the center of the side, the center of gravity is near the center of the building, but the hard core is in the core and eccentric. In the case where a twist occurs, the mixed structure 100-1 may twist around the rigid core and become a mixed structure 100-2.
FIG. 3 shows an arrangement example of floor panels of a mixed structure 100 of a wooden structure and an RC structure. It is a part where the core 6 and the wooden part which are RC structures are joined, and the wooden side has the beam 4 and the beam 45 (or wall), and the floor 2 is provided.
FIG. 4 shows an elevation view of a mixed structure 100 of a wooden structure and an RC structure. It is a four-story building, and a wooden structure is arranged on the left and right of the core 6 which is an RC structure. Mixed structure building 100 is built on RC foundation 71. The wooden structure comprises a pillar 3 (preceding pillar 33), a beam 4 and a floor 2. In addition, it has illustrated as a double floor structure as a finish floor. The core part comprises an RC wall 52 and an RC floor 53.
The basic frame configuration of the mixed structure 100 of this wooden structure and RC structure is a framework of a reinforced concrete core 6 and a wooden part 1 disposed around it, a so-called plane mixed structure. In this plane mixed structure, stress concentration to the core-peripheral frame joint due to the twisting of the building due to the eccentricity (displacement of the center of gravity and the hard core) caused by the horizontal rigidity difference between the core part and the peripheral frame consisting of wooden parts. Respond to the following as follows. Assuming that this building is an office building, as shown in FIG. 2, the core is moved to one side (back side of the building) and a large span work space is arranged on the front side, so that the structure is prone to twisting. We expect the strength of floor panels, and transmit the horizontal force generated in the wooden part to the core to reduce the horizontal force burden of the wooden frame. In addition, since wood is much lighter than concrete, the amount of foundation can be reduced compared to the case of all RC construction, the wooden part is highly resistant to earthquakes, and the joint load on the core part does not increase so much.

The main examples of joints are shown in FIGS. FIG. 5 shows an example of a plan view of the wooden and RC joint structure of the floor unit. FIG. 6 shows an example of the elevation of a wooden-RC joint structure. FIG. 7 shows an example of the elevation of the beam-to-column connection structure of the wooden part.
FIG. 5 shows an example of a plan view of the wooden and RC joint structure of the floor unit.
In the floor unit, one CLT floor plate 21 is disposed between two wooden columns 3 and 3 and an RC wall 52 which is a part of the RC frame. A joint 8 is formed between the RC wall 52 and the CLT deck 21. In this example, joining anchors 81 are provided at the corners and center of the CLT floor plate 21. At the corner anchors 81 there is a metal fitting 82 with RC joint bolts 83 extending to the RC wall 52 and wood joint bolts 84 extending to the CLT floor slab 21. The central portion allows the RC joint bolt 83 to enter the RC wall 52 from the floor plate center joint 85 embedded in the CLT floor plate 21.
The adjacent CLT floor slabs are indicated by 21a and 21b.
A jointing anchor is a means to perform the function of joining wooden and RC construction. Specifically, as the anchor structure, a bolt penetrating the wooden part and the RC part, a joint metal object such as a metal on the feathered board, a receiving member on the jaw provided on the RC side, a floor material and a beam material from the wooden side to the RC side It is possible to take measures such as extension.
For example, when the beam is extended to the RC side, the finish is in a state in which the beam is inserted into or penetrated into the hole of the RC wall. If the wings and bolts that pop out are attached to the part of the beam that has entered the wall, the removal prevention function will be improved.

FIG. 6 shows an example of the elevation of the joint portion 8 between the wooden structure and the RC structure. This joint is the corner cross section of the CLT deck.
The RC structure is composed of an RC wall 52 and an RC floor 53. The RC wall 52 is provided with a beam receiving member 56 for receiving the beam 4 on the wooden side in a convex shape.
The wooden side is composed of CLT floor 21 and beams 4. Incidentally, there is a double finish floor 23, and the front and back of the CLT floor plate is covered with a refractory material 91 such as gypsum board. Wood materials are provided with fireproofing means such as fireproofing if necessary.
The anchor 81, which is a joint member, extends from the joint metal 82 provided on the CLT floor 21 to the RC floor 53 through the RC wall 52 and the RC joint bolt 83. On the other hand, a wood joint bolt 84 extends from the joint metal 82 to the center side of the CLT floor slab.
Furthermore, an end of the beam 4 is mounted on a beam receiver 56 formed in a convex portion provided on the RC wall 52.
In the illustrated example, since the RC wall 52 and the wooden part are joined, the RC joint bolt 83 penetrates through the wall thickness, so the CLT floor slab and the RC floor are joined by the anchor, but with the RC column In some cases, it is possible to join the beam 4 and the RC beam.
In addition, the joint portion 8 is a structure in which the wooden structure is in direct contact with the RC structure, and as described later, this completes the wooden structure in advance and completes the anchor, which is fixed on the wooden side, the formwork It is realized by putting concrete in a state of extending to RC without intervention.
The floor thickness of RC construction is about 20 cm. If the anchor is extended from the RC floor side, it can not be received at the floor, considering the cover thickness and the like, in consideration of the tolerance error and the construction error. In that case, it will be received by the wooden beam side, but in order to adjust the horizontal level conversely, it is necessary to provide an anchor below the RC floor, and a bulge for that purpose is provided on the RC wall to be an anchor support It will be. In the present invention, it is not necessary to provide such an extra structure on the RC construction side by releasing the anchor from the wooden side. In particular, by adopting thick CLT, an anchor with sufficient fixing strength can be prepared and extended to the RC construction side.
Therefore, at the joint portion, the formwork is not interposed on the wooden side, and the concrete directly contacts RC concrete. In particular, the configuration in which the anchor bolt is provided on the wooden floor material is the unique configuration of the present invention.
The wooden member provided with the anchor is a member in contact with the RC structure in addition to the floor slab and the beam, and a member capable of securing the joint strength can be used. That is, a wall material, a pillar material, a roof material, etc. can be utilized.
Furthermore, when a high strength material such as CLT illustrated in the present specification is used as the residual form, the form can be used as a joining member, and a separator used in a concrete form can be used as an anchor.

FIG. 7 shows an example of the elevation of the beam-to-column connection structure of the wooden part. It is an example of the junction structure of the end by the side of the wooden side of a floor unit.
In this example, the upper and lower pillars 3, 3 are connected to each other, and the CLT floorboard is cut into a pillar shape. The pillar 3 is also coated with a refractory material 91.
At the end of the beam 4, a wooden column and beam joint metal 86 is provided and bolted to the column 3. A T-shaped or L-shaped metal plate 86a is fixed to the end of the beam with a drift pin 86c or the like, and the flange and the wooden column 34 are connected with a connection bolt 86b.

  As a mixed structure of wooden structure and RC structure, mainly as shown in FIG. 1, an RC structure part is arranged as a core in the side center and a mixed structure with a construction in which wooden parts surround three sides mainly However, the present invention is not limited to this. For example, the structure is such that the RC structure is a center core and the periphery is a wooden portion, and the upper layer is a wooden structure and the lower layer is an RC structure. It can also be an RC foundation and wooden columns.

<About wooden part precedent construction, construction method to construct after RC construction>
FIG. 8 shows an outline of a construction method in which a wooden part is pre-installed and an RC part is post-installed.
FIG. 8A shows a process of constructing a wooden part on an RC foundation 71. FIG.
On the RC foundation 71, a leading pillar 33 constituting a wooden part is built, the leading floor 22 is stretched to three layers, and a third leading pillar 33 is being built. In this state, temporary braces are inserted.
FIG. 8 (b) shows a state in which a four-tiered preceding wooden frame 14 constituting a wooden part has been completed. In this state, the space for the RC core is empty.
At the end of the wooden frame facing the RC construction, the anchor for joining shown in FIG. 5 and FIG. 6 is provided.
FIG.8 (c) has shown the state by which the core 6 of RC construction was constructed | assembled in the space | gap which was vacant in FIG.8 (b). The RC part casts concrete on the site and assembles the formwork so that the anchor comes out in the cast space.

Since the anchor is set from the wooden side before placing the concrete, the anchor is fixed to the concrete in the arrangement and fixed. It becomes unnecessary to secure the accuracy of the wooden part and the RC part accompanying the joining. There is a common error in construction both in RC construction and wooden construction, and because there is also construction accuracy, that connection becomes difficult, but it is flexibly handled without worrying about the connection by performing wooden construction in advance. You will be able to
If CLT is used as the formwork on the wooden side, the out-of-plane rigidity is high and support work is simple. In addition, wooden parts that are open as RC joint surfaces can be constructed and supported by CLT in advance, and they can be used as earthquake-proof walls during erection, or they can be used as molds as they are. It can also be used as a formwork, as a leftover material and used as a wall material.
When CLT is used as a residual form, finishing can be simplified and finishing allowance can be reduced, and the design freedom of the indoor space and the effective utilization of the space can be improved.

The construction process is shown in FIG.
FIG. 9A is a process of forming a foundation 7 by providing a foundation beam 72 made of RC. This foundation formation process is the same as in the prior art.
FIG. 9 (b) is a process of constructing a single layer part of the wooden part on the foundation 7.
The pillar 3 is built on the foundation beam 72, the beam 4 is joined to the pillar 3, and the CLT floor slab 21 is stuck thereon. The anchor 81 is loaded on the CLT floor plate 21. At this time, a formwork 63 is built on the RC construction side and used as a temporary construction material. A CLT mold material can be used as a mold material. In this example, the thickness of the CLT deck is 21 cm or more.
Needless to say, the formwork is not limited to CLT, and general facing materials and support materials can be used.
FIG. 9C shows a state in which a two-layer portion is constructed in the same manner as the construction of a single layer portion of the wooden frame 11. Furthermore, assemble the upper layer of the wooden part in the same way.
FIG. 9 (d) is an elevation view of the second layer from the RC construction side centering on. The floor plates of the second and third layers and the beams are exposed to the RC structure side between the CLT form members 64. Since this is done, the RC wall, the floor slab and the beam after the concrete are placed and cured will be in close contact. In such a state, the construction of the wooden frame 11 is completed.

FIG. 9E is a process of forming a cast material 63 on the RC wall side and a cast material 63 for an RC floor to form a casting space 61 for casting concrete. The anchors 81 extend into the space for the RC floor. The formwork 63 is disassembled.
FIG. 9 (f) shows the condition in which the concrete 62 is placed in the placement space 61 and cured, and the anchor 81 passes the RC wall from the CLT floor plate 21 and becomes the RC floor 53. It extends to a part and is buried in concrete 62.
In Fig. 9 (g), the formwork 63 on the RC construction side is demolded, the RC wall 52 and the RC floor 53 are constructed, and the RC part is completed, and the wooden / RC mixed structure is built. Is built.
The CLT form material 64 is left unremoved and used as a wall 45 of the wooden part.
In this construction example, an example is shown in which a plurality of layers are cast at once.

(Example of placing by hierarchy)
FIG. 10 shows an example of placing for each hierarchy.
In FIG. 10 (a), in addition to the installation step of the first layer of FIG. 9 (a), a formwork 63 facing the CLT formwork 64 is temporarily provided to form a casting space 61, and the space Cast concrete 62 to build a single layer of wooden and RC mixed structure. Here, a second RC floor 53 is also placed.
In FIG. 10 (b), the second layer is constructed in the same manner as FIG. 10 (a), and concrete is cast. In this way, a wooden / RC mixed structure is constructed for each layer, and the upper layer is constructed and completed.
In this example, it is an example which partially carries out the construction of the wooden part first, and carries out the post construction of the RC part to construct a wooden / RC mixed structure building.

(Wooden pillar precedent construction, RC foundation after construction example)
FIG. 11 shows an example of construction in which a wooden column precedes and an RC foundation is post-installed.
FIG. 11 (a) shows a leading pillar 33 in which an anchor 81 is attached to the proximal end of the wooden pillar 3. As shown in FIG.
FIG. 11 (b) shows a state where the column connection space 73 for the height of the foundation placement is opened in the base 74 and the leading column 33 is built. The base 75 is attached to the lower part of the anchor 81 provided on the leading pillar 33 and placed on the base 74, and the support 92 is set up with diagonal lines. In this state, a column joint space 73 is provided. In addition, the height of the foundation beam 72 minutes is secured at the lower part of the pillar. By this, the implementation of the wooden part can proceed without being restricted by the concrete placement and curing of the RC foundation.
FIG. 11C shows a step of forming a foundation reinforcing bar 76 in the column joint space 73 and casting concrete.
FIG. 11 (d) shows the process of hardening the foundation concrete to form the RC foundation 71 and foundation beam 72, while constructing the beam 4 and the floor 2 above the leading column 33. The wooden part will be built if there is an upper layer.

(Other construction examples)
FIG. 12 shows an example in which a joint portion of wooden construction and RC construction is preceded in construction.
An example is shown in which the joining portion 8 of the preceding wooden frame 14 of the wooden portion 1 and the RC structure portion 5 is constructed, and the remaining wooden portion is sequentially followed as the backward wooden frame 15. In this construction example, a construction method shown in FIG. 9 in which a wooden part is preceded and an RC construction is post-applied is applied to a joint between a wooden and an RC construction, and the other parts are sequentially advanced.
FIG. 13 shows an example in which an RC pillar 54 is added to the RC structure in FIG. By providing the RC pillar 54, the anchor 4 can be provided on the beam 4 to be joined to the pillar. The joint strength can be increased by increasing the number of anchors by the height of the beam.

(Other examples of wooden and RC mixed structures)
The wooden / RC mixed structure is not limited to the examples introduced so far, and can be designed freely.
For example, FIG. 14 shows an example in which the center core is made of RC. Wooden frames are placed on both sides of the center core. Further, FIG. 15 shows an example in which the lower two layers and the core are made of RC, and the third and fourth layers are made of wooden.

1. Wooden part 11. Wooden frame 14. Preceding wooden frame 15 Back row wooden frame

2. Floor 21. CLT floor version 22. Preceding floor 23. Finished floor

3. Column 32. Base mounting hardware 33. Leading pillar 34. Wooden pillar

4. Beam 41. Leading beam 45. Beam (wall)

5. RC part 51. RC enclosure 52. RC wall 53. RC floor 54. RC column 56. Beam support

6. Core 61. Placing space 62. Concrete 63. Formwork material 64. CLT formwork

7. Foundation 71. RC foundation 72. Foundation beam 73. Column joint space 74. Foundation 75. Base 76. Foundation rebar

8. Joint 81. Anchor 82. Bonding hardware 83. RC joint bolt 84. Wood joint bolt 85. Floor version central connector 86. Wooden column and beam joint hardware 86a. Metal plate 86b. Connection bolt 86c. Drift pin

91. Refractory material 92. support

100. Mixed structure

Claims (11)

In the construction method of the building which unified the wooden structure part and the RC structure part,
It is a construction method of constructing in advance the construction of the wooden construction part and following the construction of the RC construction part,
At the joint between the wooden frame and RC frame, an anchor provided on the wooden frame is placed in the concrete placing space, then concrete is placed in the placing space and hardened to mix the wooden structure and the RC structure. A method of constructing a wooden / RC mixed structure that is characterized by constructing a structural building.   2. A method of constructing a wooden / RC mixed structure according to claim 1, wherein the joint portion of the wooden frame is a floor or a floor and a beam.   The construction of the wooden / RC mixed structure construction according to claim 1 or 2, wherein the joint portion of the wooden frame is a base end portion of the column, and the joint portion of the RC frame is an RC foundation or an RC foundation beam. Method.   The method of constructing a wooden / RC mixed structure building according to any one of claims 1 to 3, characterized in that CLT (Cross Laminated Timber) is used for the floor of the wooden construction part.   The construction method of the wooden / RC mixed structure construction according to any one of claims 1 to 4, wherein the RC construction portion is disposed on the inner side of the construction.   The construction method of a wooden / RC mixed structure building according to any one of claims 1 to 5, characterized in that CLT (Cross Laminated Timber) is used as a formwork material for constructing a joint portion of an RC structure portion.   The method of constructing a wooden / RC mixed structure building according to claim 6, wherein a formwork material for constructing an RC structure portion is a residual formwork.   The method of constructing a wooden / RC mixed structure construction according to claim 6 or 7, characterized in that a formwork material for constructing an RC structural portion is a temporary seismic wall when the wooden portion is erected.   The wooden frame part according to any one of claims 1 to 8, characterized in that the wooden frame portion provided with the anchor disposed in the concrete placement space is directly in contact with the concrete without providing a formwork. How to build a mixed structure building.   A wooden / RC mixed structure in which a wooden structure part and an RC structure part are integrated, and characterized by comprising a joint part in which the wooden structure part and the RC structure part are in direct contact with each other in the vertical direction. Wooden / RC mixed structure building.   The wooden / RC mixed structure building according to claim 10, wherein a floor material constituting the wooden structure part is CLT.

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