JP4436226B2 - Exterior wall panel construction method - Google Patents

Description

The present invention relates to a pre-built while temporary support to the external wall panels on the upper layer side to the outer wall panels of the lower side of skeleton that is supported by the skeleton, construction how the external wall panel for building skeleton of reinforced concrete .

  When the outer wall of a reinforced concrete structure building is constructed from pre-cast outer wall panels such as curtain walls, the outer wall panel stores a spandrel part having a portion extending from the waist wall to the vertical wall, glass, sash, etc. In the case where the spandrel part and the window part are separated from each other, the spandrel part is installed in front of the window part as an outer wall panel for the housing.

  The outer wall panel is generally suspended from the tower crane or the crane on the ground and is suspended on the outer periphery of the building, and is kept supported by the crane until the connection to the frame is completed. Since the outer wall panel occupies a certain crane for a long time, the operation rate of the crane is lowered, which may affect the construction period.

  Therefore, a support is installed on the outer wall panel on the lower layer side that is supported prior to the chassis, and a backup support is installed between the constructed chassis and the support, and a new upper wall panel is supported on both supports. Therefore, there is a method of limiting the use of the crane at the time of suspension and reducing the occupation time of the crane (see Patent Document 1).

  A mounting jig that can hold the lower wall panel and the upper wall panel at the same time is installed on the lower wall panel that is supported prior to the housing, and the lower wall panel is held. Install the upper-layer outer wall panel on the jig, install the support between the upper and lower outer wall panels, and install the diagonal support between the mounting jig and the built frame, and install the upper layer on the mounting jig and both supports. There is also a method of supporting the outer wall panel on the side (see Patent Document 2).

JP 2004-124547 A (paragraph 0028, FIG. 1, FIGS. 3 to 6) Japanese Patent Publication No. 7-116843 (Claim 2, FIG. 1)

  However, in the method of Patent Document 1, a support is installed between an outer wall panel on the lower layer side that is previously supported by the housing and an outer wall panel on the upper layer side that is newly installed, and the support and the constructed slab In order to ensure the stability of the outer wall panel when the outer wall panel is suspended on the support, the upper end position and the lower end position of the beam for each outer wall panel Thus, it is necessary to join the housing at two locations, upper and lower, and the work for supporting the outer wall panel on the housing tends to be complicated.

  In addition, when the outer wall panel has only wall plates corresponding to the waist wall and the hanging wall as in Patent Document 1, the outer wall panel is supported only at one point on the support in the longitudinal section, and depending on the support alone, the outer wall panel may be Sufficient stability when suspended. For this reason, the crane cannot be separated until the joining to the frame is completed, and consequently the occupation time of the crane is not greatly reduced.

  Furthermore, in Patent Document 1, since it is assumed that the outer wall panel is supported by the steel beam as the casing, the outer wall panel made of precast concrete is unlikely to behave integrally with the steel beam due to the difference in rigidity. Fasteners that allow the outer wall panel to freely deform relative to the frame must be secured to both the outer wall panel and the steel beam. In addition, both fasteners must have the ability to follow the interlaminar displacement, which is the relative deformation between the outer wall panel and the steel beam, and the expansion and contraction of the steel beam due to thermal stress, which increases the cost required to manufacture the fastener and the outer wall panel. Tend to.

  In the method of Patent Document 2, since the outer wall panel needs to be joined to the frame beam, the mounting jig must be arranged on the outdoor side of the outer wall panel, and the diagonal support is used as the mounting jig under the outer wall panel on the upper layer side. Since it will connect, the stability of the outer wall panel of the upper layer side is easy to be impaired. In addition, since the mounting jig straddles the upper and lower outer wall panels and needs to be connected to both sides, it takes time to attach and detach the mounting jig to and from the outer wall panel, and after the upper wall panel is supported by the housing The diversion efficiency of the mounting jig tends to decrease.

From the above background, the present invention was devised to solve the problems of the conventional method, and when the outer wall panel is hung on the support or when it is hung from the method of Patent Documents 1 and 2. of can ensure stability, as a result, can significantly reduce the occupation time of the crane, it is to propose a construction how the outer wall panel capable of reducing manufacturing cost.

  According to the first aspect of the present invention, the upper-layer outer wall panel is temporarily supported by the pre-cast concrete upper-layer outer wall panel while the built-up housing and the lower-layer outer wall panel supported by the housing are temporarily supported. In the construction method of the outer wall panel for constructing the reinforced concrete frame to be integrated, the upper layer outer wall panel in which the fixing material to be supported by the reinforced concrete frame is projected indoors is used as the lower wall panel. And a support member is installed between the support and the constructed casing, and between the outer wall panel on the upper layer side and the constructed casing. A step of temporarily supporting the outer wall panel on the upper layer on a material, and an outer wall panel on the upper layer side in a reinforced concrete frame integrated with the outer wall panel on the upper layer side. In a state where the fixing member Le is inserted, its building a reinforced concrete skeleton and a step of supporting the external wall panels of the upper layer side to the skeleton, and configuration requirements to have a.

  The invention according to claim 2 is characterized in that the upper layer side outer wall panel is temporarily supported by the precast concrete upper layer side wall panel while the constructed case and the lower side outer wall panel supported by the case are temporarily supported. In the construction method of the outer wall panel for constructing the reinforced concrete frame to be integrated, the upper layer outer wall panel in which the fixing material to be supported by the reinforced concrete frame is projected indoors is used as the lower wall panel. And a temporary member for connecting the outer wall panels between the lower outer wall panel and the upper outer wall panel along the indoor side surface of the outer wall panels. A support material is installed between the support and the constructed housing, and between the temporary member and the constructed housing. Temporarily supporting the upper-layer outer wall panel, and in a state where the fixing member for the upper-layer outer wall panel is inserted into a reinforced concrete frame in which the upper-layer outer wall panel is integrated. And a step of supporting the outer wall panel on the upper layer side on the casing.

  According to the first and second aspects of the present invention, the outer wall panel on the upper layer side is temporarily supported by the outer wall panel on the lower layer side and the built casing, so that the outer wall panel on the upper layer side has two lower end portions and an intermediate portion. At this point, the outer wall panel is temporarily supported in two directions to ensure the stability of the outer wall panel when the upper wall panel is hung on the support or after it is hung. In particular, by temporarily supporting the outer wall panel in two directions, the outer wall panel is stabilized against overturning and tilting.

  By securing the stability of the outer wall panel on the upper layer suspended on the support, the upper layer is temporarily supported when the outer wall panel after suspension is temporarily supported at the lower wall panel and the built frame. The crane can be separated from the outer wall panel on the side, and the occupation time of the crane by the outer wall panel is reduced.

  In addition, the frame that supports the outer wall panel on the upper layer side is a reinforced concrete structure in which the difference in rigidity from the outer wall panel made of precast concrete does not become a problem, so that the outer wall panel acts as a frame and both of them behave integrally. If it is joined, it is not necessary to join so that an outer wall panel can be deformed relatively with respect to a housing. Therefore, the fixing of the outer wall panel to the housing can be completed simply by inserting the fixing material protruding to the indoor side into the housing to be constructed and constructing the housing as it is. It is not necessary to have.

  In particular, the invention according to claim 1 is to temporarily support the upper wall panel on the support and the retaining material, thereby causing the support to bear the vertical load of the outer wall panel on the upper layer and causing the bearing material to bear the horizontal load. In order to stabilize the outer wall panel, the outer wall panel only needs to be connected with a retaining material at the most rational position, and the stability and construction accuracy of the outer wall panel during construction can be improved.

  In particular, the invention according to claim 2 may be configured such that the temporary member is constructed along the indoor side surfaces of both outer wall panels so that the retentive material is connected to any part of the temporary member straddling the upper and lower outer wall panels. Since it is not necessary to directly connect to the outer wall panel, it is possible to install the retaining material by selecting a position where the housing to be constructed and the retaining material do not interfere with each other. The vertical load on the outer wall panel on the upper layer is borne by the support, and the horizontal load is borne by the temporary member and the retentive material. The temporary member straddling the upper and lower outer wall panels restrains the displacement of the upper layer side outer wall panel with respect to the lower layer side outer wall panel together with the retentive material in the construction surface direction.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the outer wall panel on the upper layer side is a wall portion corresponding to the waist wall and the hanging wall, and the tension projecting from the wall portion to the indoor side. It has a projecting portion, and the upper layer side outer wall panel is temporarily supported by the support at the wall portion and the overhanging portion.

  In this case, on the vertical cross section, the outer wall panel is temporarily supported by the support at two locations, the wall and the overhang, so that the reaction force from the support is taken at two points, so the vertical load is higher than when there is no overhang. And improve the stability of the outer wall panel against horizontal load.

  According to the first and second aspects of the invention, the outer wall panel on the upper layer side is temporarily supported by the housing in two directions at the lower end portion and the middle portion to ensure the stability of the outer wall panel immediately after installation. For this reason, it is not necessary to join the casing at two locations on the upper and lower sides for each outer wall panel. Therefore, since it is sufficient to join the outer wall panel to the housing at one place in the intermediate portion, the work for supporting the outer wall panel on the housing can be simplified.

  By securing the stability of the outer wall panel on the upper layer side, after the upper outer wall panel is suspended, the crane is mounted on the outer wall panel when temporarily supported on the lower wall panel and the built frame. Therefore, the time for one outer wall panel to occupy the same crane can be reduced, and the construction period can be shortened by increasing the operation rate of the crane.

  In addition, because the frame is reinforced concrete, it is only necessary to join the outer wall panel made of precast concrete to the frame so that they both move together, so there is no need to consider the interlayer displacement of the frame, and the frame of the outer wall panel. The fixing member protruding to the indoor side can be inserted into the housing to be constructed and the construction of the housing can be completed as it is.

  Since the outer wall panel can be supported by the housing simply by embedding the fixing material in the housing to be constructed, it is not necessary to provide the fixing material with a function to follow the interlayer displacement, and the structure of the fixing material and the embedding thereof Since the structure of the outer wall panel manufactured in this way is simplified, the manufacturing cost of the fixing material and the manufacturing cost of the outer wall panel can be reduced.

  According to the first aspect of the present invention, since the retaining material can be connected to an arbitrary position of the outer wall panel, the most rational position can be selected for stabilizing the outer wall panel. Retaining materials can be connected and installed so as to suppress the vibration and shaking of the panel. As a result, since the outer wall panel can be joined to the housing in the most stable state, construction accuracy on joining the outer wall panel to the housing can be improved.

  According to the invention described in claim 2, since it is possible to select the position where the housing to be constructed and the retaining material do not interfere with each other, it is possible to construct the retaining material without forming a useless hole in the housing such as a slab, No work is needed to close the useless holes after removing the materials.

  According to the invention described in claim 3, since the reaction force from the support is taken at two points on the longitudinal section, the stability of the outer wall panel with respect to the vertical load and the horizontal load is improved as compared with the case without the overhanging portion. , Can reduce the burden of the material, and can simplify the material. Since the crane can be separated from the outer wall panel at an early stage by improving the stability, the operation rate of the crane is further improved, and the construction period can be greatly shortened.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing the outline of the construction method of the outer wall panel according to the first embodiment of the present invention, and FIG. 4 is a longitudinal sectional view showing the outline of the construction method of the outer wall panel according to the second embodiment. .

  In the present embodiment, the reinforced concrete in which the upper layer outer wall panel 2 is integrated while the upper layer outer wall panel 2 made of precast concrete is supported by the constructed outer frame and the lower layer outer wall panel 1 supported by the case. This is a construction method for an outer wall panel in which a built-in frame is constructed from the lower layer side toward the upper layer side. In the following description including drawings, the lower outer wall panel 1 is also made of precast concrete. However, the lower outer wall panel 1 may be constructed of cast-in-place concrete.

  The reinforced concrete structure referred to in the present embodiment includes a steel reinforced concrete structure and a steel pipe concrete structure. For each of the frames, that is, the column 6, the beam 7, the slab 8, and the wall, the entire cross section is constructed with on-site cast concrete and a part of the frame. In some cases, the cross section is precast and the remaining cross section is constructed with cast-in-place concrete.

  In the first embodiment, as shown in FIG. 1, a support 4 is installed above the outer wall panel 1 on the lower layer side that is supported by the chassis in advance, and between the support 4 and the constructed chassis, and the installation. In the method in which the retaining material 5 is inclined between the newly constructed upper-layer outer wall panel 2 and the built frame, and the upper-layer outer wall panel 2 is temporarily supported by the support 4 and the retaining material 5. is there.

  In the drawing, the outer wall panels 1 and 2 are provided with wall portions 1a and 2a corresponding to the continuous waist wall and the vertical wall, and the support to the housing in order to improve the stability during construction and facilitate the joining to the housing. For this purpose, it is made of precast concrete with projecting portions 1b and 2b that project from the walls 1a and 2a to the indoor side and are joined to the housing.

  When the outer wall panels 1 and 2 have the overhang portions 1b and 2b, the overhang portions 1b and 2b have a sufficient number of reinforcing bars, anchors, fixing plates, and the like to be supported by the housing from the overhang portions 1b and 2b. Alternatively, the fixing material 3 having a size protrudes and is temporarily supported by the support 4 directly below the wall portions 1a and 2a and the overhang portions 1b and 2b when the outer wall panels 1 and 2 are installed.

  In the drawing, as the fixing material 3, a reinforcing bar embedded in the outer wall panels 1 and 2 at one end side and fixed and fixed and embedded in a housing such as a slab 8 at the multi-end side is shown. The fixing material 3 is mainly connected to the main reinforcing bar in the slab 8 or fixed in the concrete of the beam 7 or the slab 8 to fix the reinforcing bars in the outer wall panels 1 and 2 and the main reinforcing bars in the frame such as the slab 8. Have a role to be continuous. As shown in the figure, when the projecting portions 1b and 2b project to a position continuous with the slab 8, the fixing material 3 is formed on the beam 7 and the slab 8 when the outer wall panel 2 is installed on the support 4 as will be described later. It is arranged in a plurality of upper and lower stages so as to be positioned at the upper end bar part and the lower end bar part of the slab 8, and is embedded in the concrete by placing concrete of the beam 7 and the slab 8.

  When the outer wall panels 1 and 2 have a T-shaped cross section having the overhanging portions 1b and 2b, the support 4 is juxtaposed in the outward direction of the construction surface, and the support 4a and the overhanging portion 1b for supporting the wall portions 1a and 2a The support column 4b which supports 2b is provided, and both the support columns 4a and 4b arranged in parallel are connected to each other by an arm 4c. If there is no overhanging portion 1b, 2b, or if the protruding length from the wall portions 1a, 2a is small, the support 4 is composed only of the support column 4a. When the support columns 4a and 4b are arranged in parallel, the support 4 alone has stability in use.

  In order to provide the retaining material 5 with a function of adjusting the erection of the suspended outer wall panels 1 and 2 and preventing the fall to the outdoor side and the indoor side after the adjustment, for example, a screw at one end A member in which both the threaded portions of the cut steel pipe 51 and the steel bar are abutted and the both threaded portions are connected by a turnbuckle 52 is used. The retentive material 5 is laid between the indoor side surface of the outer wall panels 1 and 2 and the slab 8 or the wall, column 6 and beam 7.

  Depending on the cross-sectional shape of the outer wall panels 1 and 2 and the positions of the overhang portions 1b and 2b, which will be described later, the retainer 5 may penetrate the slab 8 at that level as shown in FIGS. Since the steel pipe 51 and the steel bar constituting 5 do not require a large cross section, it is possible to avoid interference with the slab bars by installing the retentive material 5 by sewing between the adjacent slab bars even if they penetrate. For this reason, during the period from the placement of the concrete to the recovery of the retaining material 5, the effect of temporarily embedding the retaining material 5 in the slab 8 is small.

  In FIG. 1 and FIG. 2, in order to save labor in the field work, the entire section of the beam 7 excluding the bar arrangement portion of the upper end reinforcement 7a is manufactured in advance with precast concrete, and the lower end reinforcement and the shear reinforcement are included in the concrete. Although the case where the beam member 71 in which the reinforcement 7b is embedded is used is shown, other than the case where only the reinforcement arrangement portion of the lower end reinforcement and the reinforcement arrangement portion near the lower end of the shear reinforcement reinforcement 7b are made into a U-shaped cross section with precast concrete. In some cases, the formwork is assembled and the entire cross section of the beam 7 is constructed of cast-in-place concrete.

  As shown in the figure, when a precast concrete beam member 71 is used, the beam member 71 is installed between the supports installed at both ends in the length direction or between the column molds 11 and 11, and then the upper end reinforcement 7a is arranged. The concrete is cast integrally with the slab 8, and the concrete is filled into the beam member 71 so as to be integrated with the slab 8.

  In FIG. 1 and FIG. 2, the outer wall of the beam member 71 is also obtained by taking advantage of the use of the beam member 71 made of precast concrete for the frame beam 7 positioned at the level of the outer wall panel 2 on the upper layer side just installed. The side where the panels 1 and 2 are installed is spread as indicated by broken lines, and the end portions of the overhanging portions 1b and 2b of the outer wall panels 1 and 2 are placed on the covered portion. In this case, on the longitudinal section, the projecting portions 1b and 2b of the outer wall panels 1 and 2 are supported at two locations of the support 4 column 4b and the beam 7, so that the outer wall is more than the case where only the support 4 is supported. There is an advantage that the installation accuracy of the panels 1 and 2 is improved and the stability in the installed state is increased.

  Here, the construction procedure of the first embodiment will be described with reference to FIGS. FIG. 2- (a) shows a state in which the outer wall panel 1 on the lower layer side is temporarily supported by the support 4 and the retaining member 5 and is supported by the built frame, here the beam 7. When the casing has a flat slab structure, the outer wall panels 1 and 2 are supported by the slab 8.

  As for the concrete of the beam 7 or the slab 8 to which the overhanging portion 1b of the outer wall panel 1 on the lower layer side is connected, the retaining material 5 connected to the outer wall panel 1 is installed between the lower slab 8 and the like. Placed in state. As shown in FIG. 2A, when the concrete of the beam 7 or the slab 8 is placed, the main bar 6 a of the column 6 on the floor immediately below protrudes from the top end of the slab 8.

  As shown in FIGS. 1 and 2, for the overhanging portions 1b and 2b, the outer wall panels 1 and 2 are used in which the height of the waist wall portion of the walls 1a and 2a is almost equal to the height of the vertical wall portion. When the retaining material 5 is connected to the waist wall portion 2a, the retaining material 5 temporarily penetrates the slab 8, but the retaining material 5 is installed so as not to interfere with the slab muscle as described above. Because it is possible to do so, there is no problem with penetrating temporarily. After removal of the masking material 5, the hole through which the masking material 5 penetrates is closed with concrete or mortar.

  After placing the concrete of the beam 7 on the lower layer side or the slab 8, the support 4 is installed on the outer wall panel 1 on the lower layer side and the outer wall on the upper layer side is placed on the support 4 as shown in FIG. In addition to installing the panel 2, one end of the retentive material 5 is newly connected to the support 4 and the outer wall panel 2 on the upper layer side just installed to ensure the stability of the outer wall panel 2. The other end of the backing material 5 is connected to a slab 8 on the lower floor. Both ends of the retentive material 5 are connected to a bracket 10 or the like temporarily projecting from the indoor side surface of the wall portion 2a of the outer wall panel 2 and the top end surface of the slab 8 (see FIG. 4). 2- (b)-(e), 4d shows the curing net which prevents the fall of the components under construction.

  The vertical load on the outer wall panel 2 on the upper layer side just installed as shown in FIG. 2- (b) is borne by the support 4, and is transmitted from the support 4 to the already constructed frame via the outer wall panel 1 on the lower layer side. . The horizontal load is borne by the retainer 5 connected to the outer wall panel 2 and is transmitted to the built frame via the retainer 5.

  In FIG. 2, the support members 5 are respectively connected to the upper end portion of the support column 4 a and the upper end portion of the outer wall panel 2 so that the support 4 and the outer wall panel 2 can be safely supported against falling. Thus, in order to improve the stability of the outer wall panel 2 until the joining to the housing is completed, it is advantageous to connect the retaining material 5 connected to the outer wall panel 2 closer to the upper end of the outer wall panel 2. In the case where the outer wall panel 2 has the overhanging portion 2b, the fall of the outer wall panel 2 to the indoor side is also prevented by the support 4b positioned below the overhanging portion 2b. It is only necessary to be able to prevent 2 from falling to the outdoor side, and it is not always necessary to be connected to the upper end portion of the outer wall panel 2.

  In parallel with the installation of the support 4 and the outer wall panel 2 and the construction of the retentive material 5, the column formwork for constructing the column 6 on the upper floor side on the lower slab 8 as shown in FIG. 11 or a column member made of precast concrete with the main reinforcement 6a or the like embedded in advance is installed. In FIG. 2 (b), the support 4 and the outer wall panel 2 are installed and the retaining material 5 is installed before the assembly of the column mold 11 and the installation of the column member, but as shown in FIG. 2 (f). The support 4 and the outer wall panel 2 may be installed and the retentive material 5 may be installed after assembling the column mold 11 and installing the column member. The column form 11 shown in FIGS. 2B and 2C may be made of thin precast concrete, steel plate, or the like in addition to wood, and may be a discarded form.

  After assembling the column mold 11 on the slab 8 and installing the column members, the precast concrete beam members 71 between the adjacent column molds 11 and 11 and between the column members as shown in FIG. Or assemble a beam formwork. A support 9 is installed between the column molds 11 and 11 or between the column members as needed, and the beam member 71 and the beam mold frame are temporarily supported also in an intermediate portion in the length direction. At this time, the fixing material 3 of the outer wall panel 2 is located at the upper end 7 a portion of the beam 7, the upper end portion of the slab 8, and the lower end portion of the slab 8. If the retaining member 5 connected to the outer wall panel 2 on the upper layer side becomes an obstacle during the construction of the beam member 71 or the assembly of the beam formwork, the assembly of the column formwork 11 is performed prior to the construction of the retaining member 5. Installation of the column member, construction of the beam member 71, and assembly of the beam formwork are performed.

  After the beam member 71 is installed, the upper end bar 7a is arranged on the beam member 71, the floor frame 12 is laid and the slab bar is arranged, and the upper end of the beam member 71 is arranged as shown in FIG. Place the concrete of the part and slab 8. When the beam formwork is assembled, after the assembling, the lower end reinforcement, the upper end reinforcement 7a and the shear reinforcement reinforcement 7b are arranged, the floor formwork 12 is laid and the slab reinforcement is arranged, and the entire beam 7 and the slab 8 are arranged. Concrete is cast.

After the concrete is placed, after the concrete has developed a strength necessary for supporting the outer wall panel 2, for example, a strength of about 18 N / mm ² or more, the support 4 and the backing material 5 are collected and sequentially replaced to the upper floor. It is done. An opening is formed in the slab 8 where the retaining material 5 was present after the collection of the retaining material 5, but the opening is filled by filling with concrete or mortar.

  Thereafter, the reinforced concrete frame is constructed from the lower layer side to the upper layer side by repeating the operations shown in FIGS. 2- (a) to (e).

  FIG. 3 shows the relationship between the outer wall panel 2 and the beam member 71 when construction is performed in a state where the two outer wall panels 2 and 2 adjacent to each other in the length direction of the beam member 71 are connected by the connecting plate 14. In this case, the two outer wall panels 2 and 2 may be connected to each other so that they do not deviate from each other in the height direction, the outer surface of the surface and the inner surface of the surface during construction. Or it is joined to both over the extended parts 2b and 2b. Since the relative displacement between the end faces of the adjacent outer wall panels 2 and 2 after construction can occur during an earthquake or the like, the connecting plate 14 is recovered, and a sealant, mortar, or the like is applied to the joint between the outer wall panels 2 and 2. Filler is filled.

  Next, the method of the second embodiment will be described. In this method, as shown in FIG. 4, the support 4 is installed above the lower-side outer wall panel 1 supported by the housing, and the lower-side outer wall panel 1 and the upper-layer outer wall panel 2 just installed A temporary member 13 for linking the outer wall panels 1 and 2 is installed between the support 4 and the constructed housing, and a retaining material 5 is constructed between the temporary member 13 and the constructed housing. In this construction method, the upper wall panel 2 is temporarily supported by the support 4, the temporary member 13 and the holding member 5.

  Also in FIG. 4, the outer wall panels 1 and 2 are wall portions 1a and 2a corresponding to continuous waist walls and hanging walls, and an overhanging portion 1b projecting from the wall portions 1a and 2a to the indoor side for supporting the housing. 2b, and temporarily supported by the support 4 directly below the wall portions 1a and 2a and the overhang portions 1b and 2b. A fixing material 3 to be supported by the housing protrudes from the overhang portions 1b and 2b.

  In FIG. 4, the entire section of the beam 7 excluding the bar arrangement portion of the upper end bar 7a is made of precast concrete in advance, but the lower bar bar arrangement part and the lower end of the shear reinforcement bar 7b are close to each other. In addition to the case where only the reinforcing bar portion is made of precast concrete, the entire cross section of the beam 7 may be constructed of on-site cast concrete. Further, taking advantage of the use of the beam member 71 made of precast concrete for the beam 7, a bulge portion is formed on the beam member 71, and the overhanging portions 1b and 2b of the outer wall panels 1 and 2 are placed on the burial portion. I am doing so.

  The beam 7 connected to the overhanging portion 1b of the outer wall panel 1 on the lower layer side, or the concrete of the slab 8 is between the support member 5 connected to the support 4 directly below the outer wall panel 1 and the frame such as the slab 8 on the lower floor. It is placed in a state where it is erected.

  The construction procedure of the second embodiment will be described with reference to FIGS. FIG. 5- (a) shows a state in which the outer wall panel 1 on the lower layer side is supported by the support 4 and is supported by the beam 7 which is a built frame. When the housing has a flat slab structure, the outer wall panel 1 is supported by the slab 8. In the second embodiment, a temporary member 13 that connects both the outer wall panels 1 and 2 is installed between the outer wall panels 1 and 2 adjacent to each other in the vertical direction, and the retaining material 5 is connected to any part of the temporary member 13. It is not necessary for the backing material 5 to penetrate the slab 8.

  After placing the concrete of the beam 7 or the slab 8, as shown in FIG. 5- (b), the support 4 is installed on the outer wall panel 1, the outer wall panel 2 on the upper layer side is installed on the support 4, Between the outer wall panel 1 on the lower layer side and the outer wall panel 2 on the upper layer side just installed, a temporary member 13 made of a steel material such as H-shaped steel, groove-shaped steel, square steel pipe or the like is erected and temporarily joined to both. The temporary members 13 are arranged along the wall portions 1a and 2a which are the indoor side surfaces of the outer wall panels 1 and 2, and for example, as shown in FIG. By screwing a bolt 16 penetrating the temporary member 13 into a nut 15 embedded facing the surface, the nut 15 is detachably joined to the outer wall panels 1 and 2.

  In parallel with the construction of the temporary member 13, the support member 5 is newly connected to each of the support 4 and the temporary member 13 to secure the stability of the outer wall panel 2 on the upper layer side. The temporary member 13 is installed vertically for the convenience of rearrangement to the upper layer side. The vertical load of the outer wall panel 2 on the upper layer side that has just been installed is borne by the support 4, and is transmitted from the support 4 to the already constructed casing through the outer wall panel 1 on the lower layer side. The horizontal load is transmitted to the built frame through the support 4, the temporary member 13, and the holding member 5 connected to each.

  In FIG. 5, along with the formation of the overhanging portions 1 b and 2 b in the outer wall panels 1 and 2, through holes 1 c and 2 c through which the temporary members 13 pass are formed in the overhanging portions 1 b and 2 b. In order to prevent overturning and tilting, the temporary member 13 is joined to the waist wall portion of the outer wall panel 2 through the overhanging portion 2b of the outer wall panel 2 on the upper layer side. When it is smaller than the height of the vertical wall, it is not always necessary to penetrate the overhanging portion 2b. The temporary member 13 has one length at the center in the length direction of the outer wall panels 1 and 2 or the length as shown in FIG. 6 according to the size of the outer wall panels 1 and 2 in the length direction (in-plane direction). It is arranged at two places on both sides in the direction.

  As shown in FIGS. 4 to 6, when the temporary member 13 passes through the overhang portions 1 b and 2 b of the outer wall panels 1 and 2, when the temporary member 13 is rearranged to the upper layer side, the overhang portions 1 b and 2 b There is an advantage that the reordering can be completed by simply sliding the temporary member 13 upward along the through holes 1c and 2c. In this case, the through holes 1c and 2c are filled by filling concrete or mortar. Even when the through-holes 1c and 2c are formed in the outer wall panels 1 and 2, it is not necessary to form a through-hole in the outer wall panel installed in the lowest layer of the building.

  When the temporary member 13 is used, the horizontal force when the outer wall panel 2 is about to fall to the indoor side or the outdoor side is borne by the temporary member 13 and is shared by the outer wall panel 1 and the retaining material 5 on the lower layer side. Therefore, the retaining material 5 only needs to be connected to any part of the support 4 and the temporary member 13, so that the retaining material 5 can be installed while avoiding interference with the casing to be constructed.

  In parallel with the installation of the support 4 and the outer wall panel 2 and the installation of the temporary member 13 and the retaining member 5, on the lower slab 8, the upper floor side pillar 6 is constructed as shown in FIG. The column form 11 is assembled or a column member previously made of precast concrete is installed. In FIG. 5B, the support 4 and the outer wall panel 2 are installed and the retentive material 5 is installed before assembling the column mold 11 and installing the column members. After assembling 11 or installing the column member, the support 4 and the outer wall panel 2 may be installed, and the retentive material 5 may be installed. The column form 11 shown in FIGS. 5B and 5C is made of thin precast concrete, steel plate or the like in addition to wood, and may be a discarded form.

  After assembling the column mold 11 and installing the column members, the precast concrete beam members 71 are installed between the column mold frames 11 and 11 or between the column members as shown in FIG. Assemble the frame. A support 9 is installed between the column molds 11 and 11 or between the column members as necessary, and the beam member 71 and the beam mold frame are also supported in the middle portion in the length direction. At this time, the fixing material 3 of the outer wall panel 2 is positioned at the upper end of the beam 7 or the slab 8 and the lower end of the slab 8.

  After the beam member 71 is installed, the upper end 7a and the slab bar are arranged on the beam member 71, and the upper end portion of the beam member 71 and the concrete of the slab 8 are applied as shown in FIG. Set up. When the beam form frame is assembled, the lower end bar, upper end bar 7a and shear reinforcement bar 7b, and the slab bar are arranged, and the upper end portion of the beam member 71 and the concrete of the slab 8 are placed. Is done.

  After the concrete is placed, after the concrete has developed a strength necessary to support the outer wall panel 2, the support 4 and the holding member 5 are collected and sequentially replaced to the upper layer side.

  Thereafter, the reinforced concrete frame is constructed from the lower layer side to the upper layer side by repeating the operations of FIGS.

  FIG. 6 shows the relationship between the outer wall panel 2 and the beam member 71 when the two outer wall panels 2 and 2 adjacent to each other in the length direction of the beam member 71 are connected by the connecting plate 14 in the same manner as FIG. Show. In this case as well, the two outer wall panels 2 and 2 need only be connected to each other so that they do not deviate from each other in the height direction, the outer surface of the surface and the inner surface of the surface during construction. Or it is joined to both over the extended parts 2b and 2b. After the construction, the connecting plate 14 is recovered, and the joint between the outer wall panels 2 and 2 is filled with a filler such as a sealing material.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, It can change and implement in the range which does not deviate from the meaning.

It is the longitudinal cross-sectional view which showed the construction point of the outer wall panel which concerns on 1st Embodiment of this invention. (A)-(f) is the longitudinal cross-sectional view which showed the construction procedure of the construction method shown in FIG. It is the perspective view which showed the mode when two outer wall panels shown in FIG. 1 were connected and constructed in the length direction of a beam member. It is the longitudinal cross-sectional view which showed the construction point of the outer wall panel which concerns on 2nd Embodiment of this invention. (A)-(e) is the longitudinal cross-sectional view which showed the construction procedure of the construction method shown in FIG. It is the perspective view which showed the mode when two outer wall panels shown in FIG. 4 were connected and constructed in the length direction of a beam member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer wall panel of lower layer side 2 Outer wall panel of upper layer side 2a Wall part 2b Overhang | projection part 2c Through-hole 3 Fixing material 4 Support 5 Retaining material 7 Beam 71 Beam member 13 Temporary member

Claims (3)

Build the reinforced concrete frame that integrates the upper layer outer wall panel while temporarily supporting the upper layer outer wall panel made of precast concrete to the built lower frame and the lower layer outer wall panel supported by the frame. A construction method of an outer wall panel,
The upper layer outer wall panel in which the fixing material to be supported by the reinforced concrete frame is projected to the indoor side is installed via a support above the outer wall panel on the lower layer side. A support member is erected between the housing and between the outer layer panel on the upper layer side and the constructed casing, and the outer wall panel on the upper layer side is temporarily supported by the support member and the retainer;
The reinforced concrete frame is constructed in a state where the fixing member for the upper layer outer wall panel is inserted into the reinforced concrete frame integrated with the upper layer outer wall panel, and the upper layer outer wall is formed in the frame. A method for constructing an outer wall panel, comprising the step of supporting the panel. Build the reinforced concrete frame that integrates the upper layer outer wall panel while temporarily supporting the upper layer outer wall panel made of precast concrete to the built lower frame and the lower layer outer wall panel supported by the frame. A construction method of an outer wall panel,
The upper layer outer wall panel in which the fixing material to be supported by the reinforced concrete frame is projected to the indoor side is installed above the lower layer outer wall panel via a support, and the lower layer outer wall panel And a temporary member connecting the two outer wall panels between the outer wall panel and the upper layer side wall panel along the indoor side surface of the two outer wall panels, A step of laying a retaining material between the temporary member and the constructed housing, and temporarily supporting the outer wall panel on the upper layer side to the support and the temporary member and the retaining material;
The reinforced concrete frame is constructed in a state where the fixing member for the upper layer outer wall panel is inserted into the reinforced concrete frame integrated with the upper layer outer wall panel, and the upper layer outer wall is formed in the frame. A method for constructing an outer wall panel, comprising the step of supporting the panel.   The outer wall panel on the upper layer side has a wall portion corresponding to a waist wall and a hanging wall, and an overhang portion projecting from the wall portion to the indoor side. The upper wall panel is supported on the wall portion and the overhang portion by the support. The construction method of the outer wall panel according to claim 1, wherein the outer wall panel is temporarily supported by the outer wall panel.

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