JP4520830B2 - Exterior wall panel construction method and exterior wall panel mounting structure - Google Patents

Description

  The present invention provides a method for constructing an outer wall panel for constructing a reinforced concrete structure for a floor in which the outer wall panel is installed in a state in which the outer wall panel made of precast concrete is supported by a built structure, and an outer wall panel suitable for the method. This relates to the mounting structure.

  When a precast outer wall panel such as a curtain wall is used as the outer wall of a reinforced concrete structure building, the work of connecting the outer wall panel suspended by a crane to the frame is assembled from the ground, It is often performed on a scaffold connected to a frame such as a beam.

  According to this method, when the outer wall panel is suspended, it is necessary to temporarily remove the scaffolding linking the scaffold to the chassis at the suspended position. Therefore, from the suspension of the outer wall panel to the connection to the chassis. In the meantime, the stability and safety of the scaffold are likely to be impaired, and the construction accuracy of the outer wall panel may be affected. In addition, when a building is a high-rise building, it is not a reasonable method to form a scaffold continuously from the ground to the construction floor because a huge amount of scaffold is required.

  On the other hand, as shown in FIG. 7, using a jumping (refilling type) scaffolding that is supported in a cantilevered state with a height extending over multiple layers and projecting from a frame such as a pillar, the frame of the outer wall panel There is a method of avoiding the interference between the outer wall panel and the scaffold joint by connecting to the scaffold at a position below the scaffold (see Patent Documents 1 and 2).

JP 2000-001996 A (paragraphs 0032 to 0038, FIGS. 5 and 6) JP 2001-090338 A (paragraph 0012, FIG. 1, FIG. 4)

  As shown in Figs. 7 (a) and 7 (b), the jumping scaffold is changed to the upper layer every time the outer wall work on the lower layer is completed. The scaffold itself must have a height of at least 3 layers, since it must be supported by 2 layers during the replacement.

  On the other hand, the frame that supports the scaffold in a cantilevered state needs to reach a certain level of strength after the completion of construction, and the frame that has just finished concrete placement cannot exhibit sufficient support. From the standpoint of safety, it is better to support the scaffolding to a frame that has been lapsed as much as possible after placing concrete. Therefore, it can be said that jumping scaffolds are safer as the number of layers increases.

  From the above, when using a jumping scaffold, the work on the upper level of the scaffold is in progress, but the outer wall work can only be done on the floor 3 floors below the floor where the work is done. The outer wall construction will be delayed by the number of scaffolds from the frame work, and the outer wall work will be completed after the frame work is completed for each floor. As a result, the entire building cannot be completed on a floor-by-floor basis, so it is difficult to make a reasonable plan for the entire work including finishing work and facility work, and the construction period tends to be prolonged. As the number of scaffolds increases, the delay in the outer wall construction becomes more prominent.

  The present invention was devised to solve the problems of the conventional method from the background described above, and the outer wall can be constructed on a certain floor at the same time as the frame construction, and the construction period can be shortened compared with the case of using a jumping scaffold. A panel construction method and an outer wall panel mounting structure suitable for the method are proposed.

The invention according to claim 1 is supported by the built-up frame in the construction method of the outer-wall panel in which the reinforced concrete frame is constructed in a state where the pre-cast concrete outer wall panel is supported by the built frame. An outer wall panel is installed above the outer wall on the lower layer side, and the outer wall panel is temporarily supported on the outer wall on the lower layer side, and the precast concrete made by removing the concrete on the upper part of the beam between the columns constituting the frame. The beam connecting member installed on the convex portion formed on the side surface of the outer wall panel of the beam member and the wall connecting member provided on the indoor side surface of the outer wall panel are mutually connected. It is a constituent requirement to construct a frame on the installation floor of the outer wall panel in a state where the connecting members are connected to the beam member and the stability of the outer wall panel is secured by connecting the retaining members .

  The outer wall on the lower layer side may be made of precast concrete or cast-in-place concrete, just like the outer wall panel.In the former case, the outer wall is made up of fixing materials such as reinforcing bars, anchors, fasteners, etc. that protrude from the indoor side. It is supported by the frame by fixing it in the concrete, and in the latter case, it is constructed integrally with the frame. The installation floor of the outer wall panel is a floor determined by the level of the beam or the top end of the slab to which the outer wall panel is connected.

  A newly suspended upper-layer outer wall panel is installed above the lower-layer outer wall (including the outer wall panel) supported by the built frame, and this outer-wall panel is supported on the lower-layer outer wall. The vertical load of the suspended outer wall panel is one or more located below it by ensuring the stability of the outer wall panel by taking a refrain and holding the upper end, etc. It is borne by the frame that has already reached a certain level of strength after the concrete is placed through the outer wall of the sheet.

  In other words, the installed outer wall panel is the structure of the building under construction, or the floor of the outer wall panel where the strength is not sufficiently developed, and the structure of one or more intermediate floors on the lower layer side. , It will be supported by the lower-side housing that has developed sufficient strength.

  The above-mentioned level or sufficient strength means that the outer wall located below the installed outer wall panel is strong enough to transmit the vertical load of the outer wall panel and the resulting shearing force and bending moment to the frame. Say. For example, when the outer wall on the lower layer side is an outer wall panel, hardware and reinforcing bars that support the outer wall panel on the casing can maintain the fixed state on the casing while bearing the vertical load of the installed outer wall panel. Any degree is acceptable.

  As a result of the vertical load of the outer wall panel being transmitted to the lower frame that has reached a certain level of strength, the outer wall panel can be installed on that floor regardless of the strength of the floor of the floor where the outer wall panel should be installed. become. Since the outer wall panel can be installed prior to the construction of the outer wall panel installation floor, especially concrete work, etc., the outer wall panel is used as a curing wall on that floor, and the building work is proceeded, that is, the installation of the outer wall panel and the installation of the outer wall panel It is possible to perform connection and construction of the outer wall panel installation floor in parallel.

  Specifically, to secure stability by supporting and positioning the suspended outer wall panel on the outer wall on the lower layer side and connecting a direct or indirect retaining material to the outer wall panel at the outer wall panel installation floor On the other hand, by securing the stability of the installed outer wall panel, the outer wall panel can be used as a curing wall to prevent falling and falling during construction, and the slab formwork is laid on the floor where the outer wall panel is installed It is possible to proceed with the frame work such as slab reinforcement and concrete placement. Since the outer wall panel functions as a curing wall, it is not necessary to assemble a safety fence and a scaffolding for supporting it on the outdoor side of the outer wall panel, which are necessary for proceeding with the frame construction on the outer wall panel installation floor.

  The construction of the outer wall panel installation floor can be done in parallel with the installation of the outer wall panels, so that the entire building can be completed for each layer, making it easier to make a reasonable plan for the entire construction, It becomes possible to shorten.

  Also, by not requiring assembly of the scaffold, the temporary beams and arms that support the scaffold in a cantilevered state are fixed to the chassis over several levels below the structure under construction, as in the case of using a jumping scaffold. For example, there is no need to drill a bolt hole, and no work for closing the hole is required. In terms of not requiring a scaffold, the construction period can be shortened and the construction cost required for temporary construction can be reduced.

Further, the present invention has established a support on the outer wall of the lower layer side, an outer wall panel causes temporarily supported by the support, stability against tipping such as outer wall panels connects between indirectly ahead material to the outer wall panel May be secured .

  The newly installed outer wall panel is placed on the support installed on the outer wall (including the outer wall panel) directly below it, but the frame supporting the outer wall directly below the outer wall panel exhibits sufficient strength. If not, it is supported via a support on the housing supporting the outer wall located below the outer wall. Regardless of whether the outer wall panel is supported by the cabinet on the floor immediately below or on the lower floor, the vertical load on the newly installed outer wall panel is for one layer or multiple layers. It is borne by the frame that has already reached a certain level of strength through the support and the outer wall. The horizontal load of the outer wall panel is borne by the housing through the backing material.

  In addition, if a support is installed between the outer wall two layers below the floor on which the outer wall panel is installed and the outer wall one layer below, and between the outer wall one layer below and the outer wall panel just installed, the outer wall panel becomes a support. It is preferable that the holding material that is temporarily supported and connected directly or indirectly is stable against falling or the like.

  In this case, the outer wall panel just installed is formally supported by the outer wall of the floor immediately below and the outer wall under the two layers, but the two layers that have a long elapsed time after concrete placement are practically used. It will be supported by the lower outer wall. As a result, even if the frame supporting the outer wall directly below the outer wall panel does not reach sufficient strength, the vertical load of the outer wall panel is surely borne by the two-layer lower frame that has reached a certain level of strength. Therefore, the safety of the outer wall panel when installing the outer wall panel is increased.

Further, the present invention has a structural requirement that a beam member made of precast concrete is installed between columns constituting the frame, and the stability of the outer wall panel is secured by connecting the outer wall panel and the retaining material to the beam member. To do. The beam member is manufactured with a cross section of at least a part of the beam constituting the frame, and is installed on the floor where the outer wall panel is installed, that is, the floor to which the outer wall panel is connected. The outer wall panel is connected to the outdoor side of the beam member, and the retaining material is connected to the indoor side of the beam member.

  In this case, the retaining member is connected to the outer wall panel indirectly through the beam member by connecting the retaining member to the beam member, and connected to the beam member by ensuring the stability of the beam member by the retaining member. The outer wall panel is stabilized.

  Until the end of the outer wall construction, the outer wall panel is connected to the beam member by being connected to the beam connecting material that is bonded to the outer wall panel. In addition to the connection of the retentive material to the beam member, it is possible to prevent the outer wall panel from falling or falling to the outdoor side or indoor side when the outer wall panel is temporarily supported by the support.

  At the end of the construction of the outer wall after placing the concrete, the wall connecting material and the beam connecting material connected to each other as described above are fixed in the concrete of the beam or slab, or the reinforcing bars protruding from the outer wall panel, etc. The outer wall panel is supported by the frame by fixing the fixing material in the concrete. After the frame concrete has developed strength by any method, the vertical and horizontal loads received by the outer wall panel can be transmitted to the frame concrete. Possesses the ability to support exterior wall panels that will be installed later on the floor.

In the present invention , it is preferable that a safety fence for preventing fall / falling is detachably connected to the upper end of the outer wall panel .

  In this case, the safety fence rises from the upper end of the outer wall panel of the floor where the frame work is proceeding, that is, the outer wall panel installation floor. Therefore, it is also possible to proceed with the skeleton construction from the floor where the skeleton construction is progressing to the upper floor.

  After the frame construction on the floor where the outer wall panel is installed is completed, or after the frame supporting the outer wall on the lower layer side develops a certain level of strength, the lowermost support is replaced on the outer wall panel. Since the fence is detachable, the support replaced from the bottom layer is connected to the outer wall panel as it is. The safety fence is also replaced and re-used on the newly installed outer wall panel side.

The invention according to claim 2 is a precast concrete outer wall panel supported by a reinforced concrete frame body, wherein the precast concrete is manufactured by removing the concrete above the beam between the columns constituting the frame. A concrete beam member is erected, a wall connecting material protrudes from the indoor side surface of the outer wall panel, and a convex portion is formed at a position corresponding to the wall connecting material on the side surface of the outer wall panel side of the beam member, The wall connecting material is connected to a beam connecting material installed on the convex portion, and a retentive material is connected to the beam member . The beam member is manufactured to have at least a part of the entire cross section of the beam, and is installed on the installation floor of the outer wall panel.

The invention according to claim 2 is an outer wall panel mounting structure suitable for the invention according to claim 1 or implemented in any of the inventions, and the wall connecting member is connected to the beam connecting member to If the stability of the beam member is ensured by stabilizing the beam member by connecting it to the beam member, etc., the outer wall panel can be prevented from falling and falling during the construction of the frame, and the worker during construction can be prevented from falling Is also planned.

In claim 2 , the wall connecting material and the beam connecting material need only be connected to each other and can stabilize the outer wall panel. By bringing the outer wall panel into contact with the beam member only by the connection between them or in addition to the connection between them, Or the case where the outer wall panel is stabilized by taking a refrain on the outer wall panel is included.

In particular, when the wall connecting material is arranged in two or more stages in the height direction of the outer wall panel, it is preferable to stabilize the outer wall panel by connecting the wall connecting material to the beam connecting material. .

  In this case, since the wall connecting material is arranged in two or more steps in the height direction, the vertical load acting on the outer wall panel and the reaction force against the horizontal load can be obtained from the housing until the end of the outer wall construction. Rotation of the outer wall panel around the horizontal axis or overturning is prevented only by the connection of the wall connecting material and the beam connecting material, so there is no need to keep a copy of the outer wall panel. Stability in the state is reliably ensured.

  In this case, the wall connecting material and the beam connecting material also ensure stability against rotation of the outer wall panel when the beam support that temporarily supports the beam member is removed, but it is installed on the floor above that floor. In order to support the outer wall panel, the beam support is removed because it is necessary that the wall connecting material and the beam connecting material are not deformed by receiving the load of the outer wall panel, that is, it is not necessary to bear the load of the outer wall panel. In the front, both connecting materials are buried in the concrete of the frame. After completion of the frame construction on the outer wall panel installation floor (beam member installation floor), when the concrete of the frame reaches a certain level of strength, the vertical load of the outer wall panel is transmitted to the frame via the wall connecting material and beam connecting material. Therefore, the wall connecting material, the beam connecting material, and the surrounding frame have the ability to support the outer wall panel installed on the floor above the floor. The beam support is removed at this point.

In addition, the present invention provides, for example, a position adjusting hole in at least one of the wall connecting material and the beam connecting material so that the position and inclination in the in-plane direction and the out-of-plane direction after the outer wall panel is installed. It is also possible to adjust the level, for example, by adjusting the screwing length of the bolt that passes through both the connecting members to the nut.

The wall linking member and beam connection material, and the positioning of the outer wall panel when installing the external wall panels above the lower side of the outer wall, to bear the vertical and horizontal load of the outer wall panels by being fixed directly in the concrete In some cases, it may be used only for positioning and adjusting the outer wall panel before placing concrete. In the case of the latter, in addition to the wall connecting material from the outer wall panel, the reinforcing bar protrudes to the frame side, and the reinforcing bar is simply fixed in the concrete, or connected to the reinforcing bar in the frame and fixed in the concrete. After the building is constructed, the reinforcing bars transmit the vertical and horizontal loads of the outer wall panel to the housing.

According to the first aspect of the present invention, in order to load the vertical load of the outer wall panel after installation to the casing that has already developed a certain strength or more, one layer located on the lower layer side from the casing immediately after the construction, or Without waiting for the strength of the multi-layered housing to be developed, it is possible to install the outer wall panel on the floor where the housing construction should start and proceed with the housing construction. As a result, it is possible to proceed with the outer wall work and the frame work in parallel on each floor, and to finish the work for each layer. Therefore, it is easy to make a reasonable plan for the whole work, and the work period can be shortened.

  In addition, by temporarily supporting the outer wall panel on the outer wall immediately below the outer wall panel and the outer wall under the second layer, the vertical load of the outer wall panel is surely borne by the two-layer lower frame that has reached a certain level of strength. Therefore, the safety of the outer wall panel when installing the outer wall panel can be improved.

In addition, according to the present invention , a beam member made of precast concrete is installed between the columns, and the outer wall panel is supported by the outer wall panel and the retaining material connected to the beam member to ensure the stability of the outer wall panel. It is possible to prevent the outer wall panel from being dropped or toppled while being temporarily supported by.

In addition, if the safety fence for fall / fall prevention is detachably connected to the upper end of the outer wall panel, the safety fence rises from the upper end of the outer wall panel, and the construction of the building where the outer wall panel is installed proceeds. Since the frame work can be carried out on the floor directly above the floor, the progress of the frame work can be promoted.

According to the second aspect of the present invention, the wall connecting material of the outer wall panel is connected to the beam connecting material of the beam member to stabilize the outer wall panel. The fall and fall prevention of the outer wall panel and the fall of the worker during construction are attempted.

  In addition, if the wall connecting material arranged in two or more steps in the height direction is connected to the beam connecting material, the stability of the outer wall panel during the frame construction can be ensured reliably and simply. The outer wall panel of the floor above that floor can be supported.

  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 a state at the start of construction of the construction method according to the embodiment of the present invention.

  In the present embodiment, as shown in FIGS. 1 to 5, an outer wall panel 3 made of precast concrete is installed above the outer walls 1 and 2 on the lower layer side supported by the built frame, and the lower layer is lower than the outer wall panel 3. This is a construction method of the outer wall panel 3 for constructing a reinforced concrete frame on the installation floor of the outer wall panel 3 while temporarily supporting the outer walls 1 and 2 on the side and securing the stability of the outer wall panel 3. Specifically, the outer wall panel 3 is temporarily supported by a support 4 installed on the outer wall 1 on the lower layer side, and stability is ensured by a retaining material 5 that is directly or indirectly connected to the outer wall panel 3.

  In the following description, including the drawings, the same work is repeated for each layer, so that the building is constructed toward the upper layer side. Therefore, the outer wall panels made of precast concrete are also applied to the outer walls 1 and 2 on the lower layer side. 3 is used, but the outer walls 1 and 2 on the lower layer side may be made of cast-in-place concrete and integrated with the frame.

  The reinforced concrete structure referred to in this embodiment includes a steel reinforced concrete structure and a steel pipe / steel plate concrete structure. For each of the pillar 6, beam 7, slab 8, and wall, which is a structural body, the case where the entire cross section is constructed with cast-in-place concrete and the structural body In some cases, a part of the cross section is precast, and the remaining cross section is constructed with cast-in-place concrete.

  The outer wall panel 3 has a basic shape having a wall portion 3a corresponding to a continuous waist wall and a vertical wall. As a modification, an extension portion for supporting or connecting to the housing is provided on the indoor side of the wall portion 3a. It may protrude and be manufactured with a T-shaped or saddle-shaped cross section.

  From the indoor side of the wall 3a, a sufficient number or size of reinforcing bars, anchors, fixing plates, or wall connecting members 3b as shown in FIG. The fixing material protrudes. When reinforcing bars are used as the fixing material, the fixing material is mainly connected to the slab bars in the slab 8 or fixed in the concrete of the beam 7 or the slab 8 and then the outer wall panel after the concrete develops strength. It has the role of transmitting 3 vertical and horizontal loads to the chassis. The wall connecting member 3b also plays the same role as the reinforcing bar after the concrete has reached a certain strength by connecting to the beam connecting member 7a described later. The floor of the beam 7 and the slab 8 to which the fixing material of the outer wall panel 3 is fixed becomes the installation floor of the outer wall panel 3.

  When the fixing material is a fastener-type wall connecting material 3b as shown in the drawing, a connecting material that is paired with the fixing material is provided on the beam 7 and the slab 8. In FIG. 1, the beam connecting member 7 a protrudes from the beam member 71 constituting the beam 7 at a position corresponding to the wall connecting member 3 b, but the connecting member may protrude from the slab 8. The wall connecting member 3b is connected to the beam connecting member 7a in order to take a reaction force against a rotation around the horizontal axis due to a vertical load and a horizontal load when the outer wall panel 3 is supported by the case. Two or more steps protrude in the height direction of the panel 3. The wall connecting member 3b and the beam connecting member 7a are joined to the outer wall panel 3 and the beam member 71 by anchors or the like, respectively.

  In the drawing, in order to save labor in the field work and to facilitate the connection with the outer wall panel 3, a portion excluding the bar arrangement portion of the upper end reinforcement 7b in the entire cross section of the beam 7 is prefabricated as precast concrete. The beam connecting member 7a connected to the wall connecting member 3b is projected from the beam member 71 made of precast concrete. A bottom reinforcement 7c and a shear reinforcement 7d are embedded in the concrete of the beam member 71, and an upper portion of the shear reinforcement 7d protrudes from the concrete. The beam connecting member 7a corresponds to the protruding position of the wall connecting member 3b, and is protruded to a level that can be connected to each other, such as the same level as the wall connecting member 3b.

  In the drawing, the beam connecting member 7a is disposed at a position closer to the outer wall panel 3 from the shear reinforcing bar 7d, and the concrete of the shear reinforcing bar 7d and the beam connecting member 7a can be separately placed. Further, a beam member 71 is formed in an L-shaped cross section so that concrete projects from the shear reinforcement bar 7d to the outer wall panel 3 side (outdoor side), and the concrete portion (convex portion) 7e projecting toward the outer wall panel 3 is formed. Beam connecting members 7a are projected from the upper end surface and the lower end surface. The beam member 71 shown in FIGS. 1-5 has shown the cross section (passing the convex part 7e) of the AA line in FIG. In FIG. 6, the convex portions 7e are formed at two locations for one beam member 71, but the number and shape of the convex portions 7e are not limited. Further, the beam connecting member 7a may be projected without forming the convex portion 7e or without forming the concave portion while keeping the surface on the outer wall panel 3 side flat.

  In addition to the shape shown in the drawing, the beam 7 is manufactured as a U-shaped cross-section beam member 71 by precasting only the bar arrangement portion of the lower end bar 7c and the bar arrangement portion near the lower end of the shear reinforcement bar 7d. May be constructed of cast-in-place concrete.

  The wall connecting member 3b and the beam connecting member 7a are connected to each other after the position adjustment and level adjustment of the outer wall panel 3, and are embedded in concrete to be placed later, thereby stably supporting the outer wall panel 3. . Since both connecting members 3b and 7a need only be embedded in the concrete and can transmit the vertical load and horizontal load of the outer wall panel 3 to the housing, their form and connection method are not limited, in addition to the angles and plates as shown, Any shape of hardware is used. For example, by bending both ends in the height direction of one plate and joining the plate to the outer wall panel 3 with the bent portion facing the beam member 71 side, the wall connecting material 3b arranged in two upper and lower stages is formed. You can also

  When the beam member 71 is installed between the columns 6 and 6, the beam member 71 is temporarily supported by the beam support 9. The retaining material 5 constructed between the slab 8 and the like is connected. By connecting the retaining member 5 to the beam member 71, the retaining member 5 is indirectly connected to the outer wall panel 3 connected to the outdoor side of the beam member 71. If it is allowed to allow the retaining material 5 to penetrate the slab 8 on the floor on which the outer wall panel 3 is installed or the beam 7 and the slab 8, the retaining material 5 may be directly connected to the indoor side surface of the outer wall panel 3.

  The holding member 5 is connected to a bracket or the like protruding from the side surface of the beam member 71, and is placed in a connected state until the concrete of the slab 8 integrated with the beam member 71 reaches a certain strength. Concrete is cast integrally with the slab 8 at least on the shear reinforcement 7d portion on the upper surface side of the beam member 71, so that the beam 7 and the slab 8 are integrated. In the drawing, concrete can be placed on the upper surface side and the lower surface side of the convex portion 7e separately from the concrete of the slab 8, but it may be cast integrally with the slab 8.

  The outer wall panel 3 suspended on the installation floor (N floor) of the outer wall panel 3 is placed on a support 4 installed on the outer wall 2 (outer wall panel) of the floor immediately below (N-1 floor). The wall connecting material 3b of the installed outer wall panel 3 is connected to the beam connecting material 7a of the beam member 71 installed between the columns 6 and 6 in parallel with or prior to the installation of the outer wall panel 3. .

  Since the time when the wall connecting material 3b is connected to the beam connecting material 7a is before placing concrete, in order to adjust the outer wall panel 3 and not to apply excessive force to both the connecting materials 3b and 7a, Until the concrete to which both the connecting members 3b and 7a are fixed has strength, both the connecting members 3b and 7a are kept in a state where the vertical load of the outer wall panel 3 does not act. The vertical load of the outer wall panel 3 until the concrete gives strength is borne by the support 4 and transmitted from the outer walls 1 and 2 on the lower layer side (N-1 floor or N-2 floor) to the frame. When the outer walls 1 and 2 on the lower layer side are the outer wall panel 3 and the beam 7 connected to the outer wall panel 3 is composed of the beam member 71, both the wall connecting material 3b, the beam connecting material 7a, and both are fixed. It is transmitted to the frame through the concrete.

  In FIG. 1, the outer wall panel 3 just installed is temporarily supported by two outer walls (outer wall panels) 1 and 2 with a wall connecting material 3b, which are positioned below the form and are already joined to the housing. However, depending on the time of strength development of the frame concrete, it may be temporarily supported only on the outer wall 2 immediately below, or may be temporarily supported on three or more outer walls 1 and 2.

  In the case of FIG. 1, the vertical load of the outer wall panel 3 just installed is passed through two (two sets) of supports 4 and two outer walls 1 and 2 located below the floor (N-2). It is borne by the wall connecting material 3b of the outer wall 1 of the floor and is transmitted to the frame of the floor through the wall connecting material 3b and the beam connecting material 7a. In this case, the frame of the floor (N-2 floor) two layers below the floor where the outer wall panel 3 is installed expresses the strength that can bear the vertical load of the outer wall panel 3 just installed.

  If the frame of the floor directly below the outer wall panel 3 (N-1 floor) has a strength capable of bearing the vertical load of the outer wall panel 3, the outer wall panel is connected to the outer wall 2 of the floor immediately below (N-1 floor). 3 is supported. If the cabinets on the floor directly below (N-1 floor) and the second floor below (N-2 floor) do not have sufficient strength, support the outer wall panel 3 on the lower outer wall 1 with three or more layers. become.

  In FIG. 1, a safety fence 10 for preventing fall / falling is connected to the upper end of the outer wall panel 3 just installed, and the frame on the upper floor (N + 1 floor) of the floor (N floor) where the frame work is proceeding. It is possible to proceed with the construction. The safety fence 10 has a height that reaches at least the level of the slab 8 on the upper floor (N + 1 floor) from the upper end of the outer wall panel 3, and is detachably connected to the outer wall panel 3.

  Here, the construction procedure of this embodiment is demonstrated along FIGS. FIG. 1 shows a state in which outer walls (outer wall panels) 1 and 2 on the lower layer side are temporarily supported by a support 4 and a retaining member 5 connected to a beam member 71, and are supported by a built frame, here a beam 7. Shows how it is. When the housing has a flat slab structure, the outer walls 1 and 2 are supported by the slab 8. 1 to 5, the floor below the (N−1) th floor indicates a floor where the construction is completed, and the floor above the Nth floor indicates a floor where the construction is in progress.

  FIG. 1 shows a state in which the outer wall panel 3 is installed on the construction floor (N floor) and the concrete placement of the beams 7 and slabs 8 on the floor is completed. At the time of FIG. 1, the beam member 71 on the construction floor and the beam member 71 on the immediately lower floor (N-1 floor) are temporarily supported by the beam support 9 and the retentive material 5, and the two floors below (N-2 floor) ), Since the strength of the concrete integrated with the beam member 71 is obtained, the beam support 9 is removed.

  As shown in FIG. 1, the outer wall panel 3 suspended on the construction floor (N floor) is placed on the support 4 installed on the outer wall 2 of the immediately lower floor (N-1 floor), and in the wall connecting material 3 b It is connected to the beam connecting member 7a of the beam member 7 by a bolt 3c or the like. The support 4 bears the vertical load of the outer wall panel 3, and the wall connecting member 3 b and the beam connecting member 7 a transmit the horizontal load of the outer wall panel 3 to the beam member 71 and move in the out-of-plane direction and in-plane direction. to bound. The position adjustment and level adjustment of the outer wall panel 3 are performed when the wall connecting material 3b and the beam connecting material 7a are connected.

  As shown in the figure, when the safety fence 10 is connected to the upper end of the outer wall panel 3, it is possible to prevent falling / falling on the upper floor (N + 1 floor) of the outer wall panel 3 installation floor (N floor). As shown in FIGS. 2 and 3, the outer wall panel 3 and the safety fence 10 are used as a curing wall, and the work from the assembly of the column form 11 and the installation of the column member to the installation of the beam member 71 on the upper floor (N + 1 floor) It can be performed.

  When a new outer wall panel 3 is installed on the construction floor (N floor), the main bar 6a of the pillar 6 on the floor immediately below protrudes from the top of the slab 8 on the construction floor (N floor), as shown in FIG. On the construction floor, the main reinforcement 6a of the column 6 on the construction floor is connected to the main reinforcement 6a protruding from the slab 8, and the main reinforcement 6a and the shear reinforcement are arranged to assemble the column form 11 around the reinforcement. Is called. Instead of assembling the column form frame 11, a hollow column member made of precast concrete in which the main reinforcement 6a and the shear reinforcement are embedded in advance may be installed. The column mold 11 is made of thin precast concrete, steel plate or the like in addition to wooden, and may be a discarded mold.

  Following the assembly of the column mold 11 and the installation of the column members, the beam member 71 is installed between the adjacent column molds 11 and 11 or between the column members as shown in FIG. Assembling is done. Both ends of the beam member 71 and the beam form frame are supported by the column form frame 11 and the column member. A beam support 9 is installed under the beam member 71 and the like, and the retentive material 5 is connected to an indoor side surface of the beam member 71 and the like. The other end of the backing material 5 is connected to the slab 8 or the like. As described above, the beam connecting members 7a and 7a are joined to the upper and lower surfaces of the convex portion 7e of the beam member 71.

  After installing the beam member 71 and the beam formwork, as shown in FIG. 4, the safety fence 10 of the outer wall panel 3 installed in the stage of FIG. 1 is cut off, and the support 4 on the floor immediately below (N-1 floor) is attached. The support 4 on the lower floor (N-2 floor) is installed at the stage of FIG. 1 and left on the outer wall panel 3 from which the safety fence 10 has been separated.

  The separated safety fence 10 is connected to the upper end of a new outer wall panel 3 ′ to be installed, and the new outer wall panel 3 ′ is placed on the replaced support 4 as an N + 1 floor outer wall panel 3 ′. The In order to prevent the deformation of the wall connecting material 3b and the beam connecting material 7a before the N + 1 floor outer wall panel 3 'is installed and the concrete of the slab 8 on that floor is placed, the vertical load of the outer wall panel 3' is prevented. Is not transmitted to the beam connecting member 7a, and the wall connecting member 3b and the beam connecting member 7a are connected so that the overturning of the outer wall panel 3 'is restrained.

  When the beam member 71 made of precast concrete is installed between the column molds 11 and 11 or between the column members, the load on the beam member 71 is entrusted to the column mold frame 11 or the column member. In order to give load-bearing ability, concrete is placed inside the column mold 11 and the like prior to the construction of the beam member 71. When assembling the beam form frame between the column form frame 11 and the column members, concrete may be simultaneously placed into the column form frame 11 and the beam form frame as described later.

  Following the placement of concrete on the column form 11 and the like, the construction of the beam member 71, the laying of the slab form 12 such as the deck plate on the N + 1 floor, the installation of the outer wall panel 3 ', the arrangement of the upper end reinforcement 7b of the beam 7 Assembling of the joint form on the pillar form 11 or the pillar member is performed in parallel or in parallel. Although the joint form is not shown in the figure, for example, the beam member 71 is cut out while surrounding the upper end portion of the pillar 6 and is connected to the pillar form 11 or the like to thereby form the pillar form 11 or the like. At the same time, the end of the beam member 71 is supported.

  Subsequently, after placing the reinforcing bars at the joints and the slab bars on the slab formwork 12, the concrete is placed in the joint formwork, on the slab formwork 12, and on the beam member 71. Placing concrete on the upper and lower sides of the beam member 71 directly or indirectly by placing the surfaces on the indoor side of the outer wall panels 3 and 3 ′ in contact with or close to the convex portion 7 e of the beam member 71. Can serve as a time board.

  In the illustrated example, as shown in FIG. 6, a rising portion 7 f that can serve as a swash plate at the time of placing concrete is formed over the entire length of the beam member 71 on the upper end side of the beam member 71. In order to place the exposed portion of the bar 7d and the concrete of the slab 8 at the same time and to separate the concrete above and below the convex part 7e, the rising parts 7f and 7f are sandwiched between the shear reinforcement bars 7d. They are formed in parallel.

  On the outer wall panels 3, 3 ′ side of the beam member 71, the concrete cast between them spreads from the upper surface side to the lower surface side of the convex portion 7 e of the beam member 71, and the slab 8, the beam member 71, and the column 6 are integrated. For example, as shown in FIG. 6, the portion where the beam connecting member 7 a is fixed protrudes toward the outer wall panel 3, 3 ′, and the other portion is a gap between the outer wall panel 3, 3 ′. It is relatively concave so that

  In the case of assembling the beam form frame between the column form frames 11 and 11 instead of erection of the beam member 71, the concrete is placed in the interior following the assembly of the column form frame 11 or the installation of the column member. Since it can be performed at the same time as the concrete of the slab, the concrete and the concrete having different strengths are separately cast in the pillar and the slab when the joint mold and the slab mold 12 are installed and assembled at the same time. There is a case.

  In the case where the concrete of the column 6 and the slab 8 is placed simultaneously, for example, in FIG. 4, the beam form frame 11 or the beam form frame is laid or assembled between the column members, the slab form frame 12 is laid, and the beam reinforcement is arranged. After that, installation of the outer wall panel 3 ′, installation of the joint form, and bar arrangement of the slab are performed, and then the concrete of the column 6, the beam 7 and the slab 8 is simultaneously placed. . At this time, the rope can be used as a safety handrail by hanging the rope between the main bars 6a and 6a of the column 6 protruding upward from the adjacent column molds 11 and 11 and the column member.

  In the case of separate placement, for example, in FIG. 4, concrete is placed inside the column form 11 and the column member, and then the beam form is installed and assembled, and then the slab form 12 is laid and the beam reinforcement is arranged. After the reinforcement, the outer wall panel 3 ′, the joint form, the slab reinforcement, and the concrete of the joint and the slab 8 are placed at the same time. Also in this case, a rope is spanned between the main bars 6a and 6a, and this can be used as a safety handrail.

  As shown in each figure, when the outer wall panels 3 and 3 ′ are connected to the housing using the fastener-type wall connecting member 3b and the beam connecting member 7a, the outer wall panels 3 and 3 ′ can follow the thermal elongation. In the above, the outer wall panels 3, 3 ′ are cut off from the concrete placed on the upper and lower sides of the beam member 71. For example, as shown in FIG. Intervened. When it is not necessary for the outer wall panels 3 and 3 'to have the ability to follow thermal expansion, the outer wall panels 3 and 3' are completely integrated into the housing by the reinforcing bars without using the wall connecting material 3b and the beam connecting material 7a. In some cases, the edges of the concrete cannot be cut.

  After the arrangement of the slab bars, as shown in FIG. 5, the concrete of the slab 8 on the N + 1 floor is placed, and the slab 8, the beam 7 and the column 6 are integrated. At this time, the N + 1 floor is the same as the N floor in FIG. 1 except that the column form 11 is placed, and the main line of the pillar 6 on the floor immediately below (N floor) from the top of the slab 8 on the N + 1 floor. 6a protrudes. Thereafter, the reinforced concrete frame is constructed from the lower layer side to the upper layer side by repeating the operations of FIGS.

  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 of invention.

It is the longitudinal cross-sectional view which showed the condition when the outer wall panel was mounted on the support in the embodiment of this invention, and the concrete of the slab was laid. It is the longitudinal cross-sectional view which showed the next process of the process shown in FIG. FIG. 3 is a longitudinal sectional view showing a step subsequent to the step shown in FIG. 2. It is the longitudinal cross-sectional view which showed the next process of the process shown in FIG. It is the longitudinal cross-sectional view which showed the next process of the process shown in FIG. It is the perspective view which showed the relationship between an outer wall panel and a beam member. It is drawing for demonstrating the conventional construction method. (A) is the situation where the outer wall panel was installed on the floor (N-4 floor) four layers below the N floor (slab construction floor), and (b) It is the figure which showed the condition which constructed | assembled the column beam and slab of the N + 1 floor while installing an outer wall panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer wall of lower layer side 2 Outer wall of lower layer side 3 Outer wall panel 3a Wall connecting material 4 Support 5 Retaining material 7 Beam 71 Beam member 7a Beam connecting material 10 Safety fence

Claims (2)

A construction method of an outer wall panel for constructing a reinforced concrete frame with a precast concrete outer wall panel supported by a built frame.
The outer wall panel is installed above the lower-layer side outer wall supported by the constructed housing, and the outer wall panel is temporarily supported on the lower-layer side outer wall,
A beam member made of precast concrete manufactured by removing the concrete at the top of the beam is installed between the columns constituting the frame,
The beam connecting material installed on the convex portion formed on the side surface of the beam member on the outer wall panel side and the wall connecting material provided on the indoor side surface of the outer wall panel are connected to each other,
A construction method of an outer wall panel, wherein a frame on an installation floor of the outer wall panel is constructed in a state in which a retaining member is connected to the beam member to ensure stability of the outer wall panel. A structure for attaching the outer wall panel made of precast concrete supported by a reinforced concrete frame to the frame,
A beam member made of precast concrete manufactured by removing the concrete at the top of the beam is installed between the columns constituting the frame,
A wall connecting material protrudes from the indoor side surface of the outer wall panel,
On the side surface of the beam member on the outer wall panel side, a convex portion is formed at a position corresponding to the wall connecting material,
The wall connecting material is connected to a beam connecting material installed on the convex portion ,
A mounting structure for an outer wall panel, wherein a retentive material is connected to the beam member .

Images