JP2016130443A - Construction method of composite structural building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively shorten a construction period by making each of construction work of an iron frame skeleton part, a concrete floor slab and a concrete external wall progress smoothly.SOLUTION: In a construction method of a multi-layer composite structural building 102 composed of an iron frame skeleton part 1, a concrete floor slab 2 and a concrete external wall 3, erection of the iron frame skeleton part 1 and concrete casting of the floor slab 2 are conducted in advance on a plurality of layers, and then concrete casting of the external wall 3 is conducted on the plurality of layers.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for constructing a multi-level composite structure building comprising a steel frame part, a concrete floor slab, and a concrete outer wall.

  In this type of composite structure building, steel frame parts such as steel columns and steel beams and concrete floor slabs are provided in the center of the building, and concrete outer walls are provided so as to surround the steel frame parts and concrete floor slabs. Yes.

  As a construction method of this composite structure building, first, the construction of the steel frame part is performed over a plurality of layers, and then the concrete floor slab and the concrete outer wall are placed in a plurality of layers at once. What is performed over a wide range is known (for example, see Patent Document 1).

JP 2011-202491 A

  In the construction method described in Patent Document 1, the construction period is shortened by performing concrete placement of the concrete floor slab and the concrete outer wall at a time. However, depending on the construction status, etc., it is necessary to wait until the concrete floor slab and the concrete outer wall can be poured into the concrete at once, which may lead to a longer construction period.

  For example, when placing concrete on a concrete outer wall, an external scaffold is required for the work of installing a formwork or the like. However, depending on the construction situation on the lower floor side, it may not be possible to build an external scaffold up to the placement target level. In this case, it is necessary to wait for the concrete placement of the concrete floor slab and the concrete outer wall until the external scaffolding is built up to the placement target level, leading to an increase in the construction period.

  In view of this situation, the main problem of the present invention is a method for constructing a composite structure building that can smoothly shorten the construction period by smoothly proceeding with the respective work of the steel frame part, the concrete floor slab, and the concrete outer wall. Is to provide

The first characteristic configuration of the present invention is a construction method of a multi-level composite structure building composed of a steel frame part, a concrete floor slab, and a concrete outer wall.
The construction of the steel frame part and the concrete placement of the floor slab are performed in advance over a plurality of layers, and then the concrete placement of the outer wall is performed over a plurality of layers.

  According to this feature configuration, even when it is not possible to build an external scaffold due to the construction situation on the lower floor side, etc., the construction of the steel frame part and the concrete placement of the floor slab are carried out in advance, and over multiple levels The steel frame and floor slab can be installed in advance. And after it becomes the situation where an external scaffold is built, concrete placement of an outer wall can be performed and an outer wall can be constructed over a plurality of levels. In this way, even if there is a restriction that the external scaffolding cannot be built due to the construction situation etc. on the lower floor side, the construction work of the steel frame part, concrete floor slab, and concrete outer wall will proceed smoothly, Can be effectively shortened.

  In the second feature configuration of the present invention, when placing the concrete on the outer wall over a plurality of layers, a plurality of layers are provided in a plurality of order-placed ranges in which concrete is placed from the placing start floor toward the upper floor side. It is in the point which divides.

  According to this feature configuration, since a plurality of hierarchies are divided into a plurality of order placement ranges, for example, even in a situation where concrete placement cannot be performed in a certain order placement range due to construction conditions, etc. Concrete can be placed. In this way, depending on the construction status and the like, it is possible to proceed with the concrete placement work in each of a plurality of order placement ranges, and it is possible to efficiently proceed with the concrete placement work on the outer wall over a plurality of levels.

  The third characteristic configuration of the present invention is that the concrete placement of the outer wall is performed over a plurality of layers in a form in which different order placement ranges are sequentially placed.

  According to this feature configuration, when concrete is placed in a certain casting range, the next casting range is the target for placing, so in the casting range where the concrete is placed first, It is possible to proceed with the concrete placing work in another order placement area while securing the curing period of. Thereby, it is possible to perform concrete placement work continuously while securing a curing period after concrete placement for a plurality of order placement ranges, and it is possible to effectively shorten the work period. .

  According to a fourth characteristic configuration of the present invention, the composite structure building has a shape in which a position of an outer wall is continuously different across a plurality of levels in a plan view, and is on an outer end side of a floor slab that has been previously placed. This is in that a reference portion for determining the position of the outer wall is formed.

  In the composite structure building, the position of the outer wall has different portions continuously over a plurality of levels, and therefore, when placing the concrete on the outer wall, the position of the outer wall is determined at each level in order to construct the outer wall at a desired position. Is required. Therefore, according to this feature configuration, by forming the reference portion on the floor slab that has been placed in advance, the position of the outer wall can be determined based on the reference portion at each level, and the floor slab that is close to the outer wall. By forming the reference portion on the outer end portion side, the indexing operation of the position of the outer wall can be performed easily and accurately.

Longitudinal side view of building Longitudinal side view showing the construction process of the upper layer Illustration explaining the order of concrete placement on the outer wall The figure which shows the principal part of the upper layer part for calculating the position of an outer wall The figure which shows the situation of concrete placement of outer wall

An embodiment of a construction method of a composite structure building according to the present invention will be described based on the drawings.
As shown in FIG. 1, the building 100 includes a lower layer portion 101 and an upper layer portion 102, and a seismic isolation device 103 is provided between the upper end portion of the lower layer portion 101 and the lower end portion of the upper layer portion 102. In FIG. 1, the lower portion of the lower layer portion 101 and the roof portion of the upper layer portion 102 are omitted.

  The upper layer portion 102 has a plurality of layers, and a steel frame portion 1 such as a steel column 1a and a steel beam 1b and a concrete floor slab 2 are provided in the center of the building, and around the steel frame portion 1 and the concrete floor slab 2 A concrete outer wall 3 is provided so as to surround it. Since the upper layer portion 102 corresponds to a composite structure building according to the present invention, a method for constructing the upper layer portion 102 will be described below. Incidentally, the lower layer portion 101 has a plurality of layers and is composed of a frame portion such as a steel frame and a steel reinforced concrete frame, a concrete floor slab, a concrete outer wall, and the like.

  As a construction method of the upper layer portion 102, the construction of the steel frame portion 1 and the concrete placement of the floor slab 2 are performed in advance over a plurality of layers, and then the concrete placement of the outer wall 3 is performed over a plurality of layers. Do. First, as shown by the solid line in FIG. 2A and FIG. 2B, the steel frame portion 1 such as the steel column 1a and the steel beam 1b is constructed over the entire layer of the upper layer portion 102. At the same time, the concrete placement of the floor slab 2 is performed, and the center of the building composed of the steel frame part 1 and the concrete floor slab 2 is constructed in advance. 2A is a longitudinal side view of the upper layer portion 102, and FIG. 2B is a perspective view showing a state in which the construction of the steel frame portion 1 and the concrete placement of the floor slab 2 have been performed in advance. FIG. As described above, after the construction of the center of the building composed of the steel frame part 1 and the concrete floor slab 2 is performed in advance, as shown by the dotted line in FIG. Then, concrete placement of the outer wall 3 is performed, and the outer periphery of the building composed of the concrete outer wall 3 is constructed.

  For the floor slab 2, not all the parts are placed in advance, but as shown in the dotted line in FIG. 2 (a) and FIG. 2 (b), the mating part of the outer wall 3 and the floor slab 2 Leave only 2a, and put the concrete ahead of the rest. Then, the remaining joint portion 2 a of the floor slab 2 is put into the concrete together with the outer wall 3.

  The construction of the steel frame part 1 is performed sequentially over the entire upper layer 102 from the lower floor to the upper floor, and the concrete placement of the floor slab 2 is also performed from the lower floor to the upper floor. Assume that ordering is performed sequentially over the entire hierarchy of the upper layer portion 102.

  As for concrete placement of the outer wall 3, unlike the floor slab 2, as shown in FIGS. 1 and 3, a plurality of order placement ranges in which concrete is placed sequentially from the placement start floor toward the upper floor side. A plurality of hierarchies are divided into J1 and J2. And the concrete placement of the outer wall 3 is performed over the whole hierarchy of the upper layer part 102 in the form which makes different order placement range J1 and J2 one by one.

  In this embodiment, the upper layer portion 102 has eight layers from the first to the eighth layers, one ordering range is four layers, and two ordering ranges, a first ordering range J1 and a second ordering range J2. Divide into ranges. In the upper layer portion 102, the first to fourth layers are divided into a first ordering range J1, and the fifth to eighth layers are divided into a second ordering range J2. Then, when the first order hitting range J1 is set as a placement target, the second order hitting range J2 is set as a setting target next, and then the first order hitting range J1 is set as a setting target. Then, the concrete placement of the outer wall 3 is performed over the entire layer of the upper layer portion 102 in a form in which the first order placement range J1 and the second order placement range J2 are alternately placed.

  As shown in FIG. 3, (I) after placing concrete in the first level (first ordering range J1), (II) performing concrete placement in the fifth level (second ordering range J2) As indicated by the arrows, in each of the first order hitting range J1 and the second order hitting range J2, the concrete is placed in order toward the upper floor side. That is, as shown in FIG. 1, concrete placement of the outer wall 3 is performed over the entire hierarchy of the upper layer portion 102 in the following order (I) to (VIII). The concrete placement interval is sequentially performed as soon as the next level is ready. For example, (I) one week after the concrete placement of the outer wall 3 in the first level, (II) in the fifth level The concrete is sequentially placed at intervals of one week so that the concrete is placed on the outer wall 3.

(I) First layer (first ordering range J1)
(II) Fifth hierarchy (second order hit range J2)
(III) Second level (first ordering range J1)
(IV) 6th hierarchy (2nd order range J2)
(V) Third layer (first ordering range J1)
(VI) 7th hierarchy (2nd order range J2)
(VII) Fourth hierarchy (first ordering range J1)
(VIII) 8th hierarchy (2nd order hit range J2)

  In each of (I) to (VIII), the position of the outer wall 3 is determined, a formwork is installed at the determined position of the outer wall 3, and concrete is placed on the installed formwork to construct the outer wall 3. . In addition, as described above, in addition to the outer wall 3, the joint portion 2 a between the floor slab 2 and the outer wall 3 is also placed by concrete.

  The determination of the position of the outer wall 3 will be described based on FIG. In FIG. 4, the steel frame part 1 and the floor slab 2 to be constructed in advance are shown by solid lines, and the joint part 2a of the outer wall 3 and the floor slab 2 to be constructed later is shown by dotted lines.

  A reference line K (corresponding to the reference portion) that serves as a reference for determining the position of each part of the building 100 is formed (marked out) on the outer end side of the floor slab 2 that has been previously placed. Then, since the position of the outer wall 3 is determined by the distance from the reference line K, an index line for determining the position of the outer wall 3 is formed on the floor or the like corresponding to the position of the outer wall 3. However, in this embodiment, since the mating portion 2a of the floor slab 2 is constructed later, the mating portion 2a of the floor slab 2 does not exist at a location corresponding to the position of the outer wall 3. Therefore, an index line for indexing the position of the outer wall 3 to a position that is closer to the reference line K side by a set distance P (for example, 1 m) from the position of the outer wall 3 on the outer end side of the floor slab 2 that has been placed in advance. W1 to W4 are formed (development).

  In this embodiment, the outer wall 3 has a waist wall 3a that rises from the outer end of the floor slab 2 and a hanging wall 3b that hangs down. The waist wall 3a and the hanging wall 3b are located on the outside of the building. It is in an inclined posture located in Therefore, the position of the outer wall 3 is determined from the positions of the upper end portion and the lower end portion of the waist wall 3a and the hanging wall 3b. Therefore, a first index line W1 for indexing the position of the lower end portion of the waist wall 3a is formed (marked out) at a position close to the reference line K side by a set distance P from the position of the lower end portion of the waist wall 3a. . Then, the second index line W2 for determining the position of the upper end portion of the waist wall 3a, the third index line W3 for determining the position of the lower end portion of the hanging wall 3b, and the position of the upper end portion of the hanging wall 3b are determined. Each of the fourth index lines W4 for this purpose is also formed at a position close to the reference line K side by a set distance P from each position, similarly to the first index line W1.

  Incidentally, in the one shown in FIG. 4, all of the first to fourth index lines W1 to W4 are formed on the floor slab 2 in the hierarchy corresponding to the waist wall 3a and the hanging wall 3b. It is possible to appropriately change which floor the floor slab 2 is formed with the fourth index lines W1 to W4.

  In this way, not only the reference line K but also the first index line W1 to the fourth index line W4 are formed (marked out) on the outer end side of the floor slab 2 previously placed in each level. Thus, the position of the outer wall 3 can be accurately and easily determined in each layer. Therefore, the concrete casting mold can be accurately installed at the determined position of the outer wall 3. In addition, by forming the reference line K and the first index line W1 to the fourth index line W4 on the outer end side of the floor slab 2 away from the installation location of the formwork, Even during the installation work, the position of the mold can be adjusted while confirming the position of the outer wall 3, and the mold can be accurately installed at the desired position.

  In particular, as shown in FIG. 1, the upper layer portion 102 has a shape having a curved portion in which the position of the outer wall 3 is continuously different over a plurality of layers in a side view and a plan view. In order to construct 3 at a desired position, it is required to accurately determine the position of the outer wall 3 in each level. Therefore, as described above, the reference line K and the first index line W1 to the fourth index line W4 are formed (marked out) on the outer end side of the floor slab 2 previously placed in each layer. Thus, the position of the outer wall 3 in each layer can be accurately and quickly determined, and even the outer wall 3 having a complicated shape can be appropriately constructed at a desired position.

  Based on FIG. 5, a description will be given of the installation status of the formwork. As described above, on the basis of the position of the outer wall 3 that has been determined, a mold is installed for each of the waist wall 3a, the hanging wall 3b, and the mating portion 2a, and the waist wall in the outer wall 3 of the placement target layer. 3a and the vertical wall 3b, and the concrete placement of the mating portion 2a in the floor slab 2 of the placement target layer is performed.

  FIG. 5 shows a case where (II) concrete placement of the outer wall 3 in the fifth layer is performed. In this case, the steel frame part 1 and the floor slab 2 are preliminarily constructed, but the waist wall 3a in the outer wall 3 of the lower fourth layer and the mating part 2a in the floor slab 2 are still constructed. There is no waist wall or floor for receiving and supporting the support 5 that supports the mold 4 from below. Therefore, a support member 6 such as a square bar is arranged on the upper part of the steel frame part 1, and the square bar 7 is stretched over the support member 6 and the outer end portion of the floor slab 2 that has been previously placed, and is supported by the square bar 7. The lower end of 5 is received and supported. In some cases, the lower end portion of the support 5 may be received and supported by the steel beam 1b. And the scaffold board 10 is spanned across the frame scaffold 8 and the external scaffold 9 erected on the outer end of the floor slab 2 that has been placed in advance, and the scaffold board 10 is used as a work floor for the installation work of the mold 4 and the like. Is used. Thus, the formwork 4 can be installed at a desired position while utilizing the steel frame part 1 and the floor slab 2 that have been constructed in advance.

  When concrete placement of the outer wall 3 in each level (I), (III) to (VIII) other than (II) is performed, although not shown, the waist wall 3a in the outer wall 3 in the next lower level In addition, the mating portion 2a in the floor slab 2 is constructed, and the strength is also expressed by the progress of the curing period by alternately placing the first order hitting range J1 and the second order hitting range J2 into the concrete. Yes. Therefore, in each of the first order hitting range J1 and the second order hitting range J2, the support for supporting the formwork 4 from the lower side by the waist wall 3a and the joint portion 2a when placing the concrete in order hitting. Receive and support 5. Further, the frame scaffold 8 is also erected on the mating portion 2a of the floor slab 2 or the outer end of the floor slab 2 that has been placed in advance.

  Here, with regard to the concrete placement of the vertical wall 3b, the waist wall 3a, and the joint portion 2a, for example, the vertical wall 3b, the waist wall 3a, and the joint portion 2a can be placed concrete at a time, or the vertical wall 3b It is possible to place the waist wall 3a concrete after placing the joint portion 2a into the concrete at once. That is, the range in which concrete is placed at once and the order in which concrete is placed can be changed as appropriate according to the construction status and the like.

[Another embodiment]
(1) In the above embodiment, the upper layer portion 102 is divided into two order hit ranges, the first order hit range J1 and the second order hit range J2. For example, the upper layer portion 102 is divided into three order hit ranges. It is also possible to divide, and it is also possible to divide a plurality of hierarchies of the upper layer portion 102 into not only two ordering ranges but also three or more ordering ranges. Further, each order hitting range is not limited to a range consisting of the same number of hierarchies, and may be a range consisting of different numbers of hierarchies.

(2) In the above embodiment, the concrete placement of the outer wall 3 is performed over the entire hierarchy of the upper layer portion 102 in a form in which different order placement ranges are sequentially placed. It can change suitably whether it is set as placement object in order.

  For example, if a certain casting range is set as an object to be placed continuously, and a concrete placement cannot be performed within the ordered casting range depending on the construction status or the like, another casting range can be set as the placing object. Further, the first hierarchy (first ordered range J1) → the second hierarchy (first ordered range J1) → the fifth hierarchy (second ordered range J2) → the sixth hierarchy (second ordered range J2) → 3rd hierarchy (first order range J1) → 4th hierarchy (first order range J1) → 7th hierarchy (second order range J2) → (VIII) 8th hierarchy (second order range J2) As described above, after placing the same order hitting range continuously, the concrete placement of the outer wall 3 is performed over the entire layer of the upper layer portion 102 in a form in which different order hitting ranges are set as targets. You can also.

(3) In the above-described embodiment, the shape of the outer wall 3 is not limited to a shape having curved portions where the positions of the outer wall 3 are continuously different over a plurality of layers in a side view and a plan view. The shape which has a planar part where the position of the outer wall 3 is located in the same position may be sufficient, and various shapes are applicable.

(4) In the above-described embodiment, the upper layer portion 102 only needs to include a steel frame, and the upper layer portion 102 is not limited to a steel frame and may be a steel reinforced concrete frame. In addition, the entire housing portion is not limited to a steel frame only, and a part of the housing portion may be a steel frame or a steel reinforced concrete frame.

1 Steel frame part 2 Concrete floor slab 3 Concrete outer wall 102 Upper layer part (composite structure building)

Claims (4)

A method for constructing a multi-layered composite building composed of a steel frame part, a concrete floor slab and a concrete outer wall,
A construction method of a composite structure building in which the construction of the steel frame part and the concrete placement of the floor slab are performed over a plurality of levels, and then the concrete placement of the outer wall is performed over a plurality of levels.   2. The multi-level building according to claim 1, wherein, when performing concrete placement of the outer wall over a plurality of levels, the plurality of levels are divided into a plurality of sequential casting ranges in which concrete is placed sequentially from the casting start floor toward the upper floor side. Construction method of complex structure building.   The method for constructing a composite structure building according to claim 2, wherein concrete placement of the outer wall is performed across a plurality of levels in a form in which different order placement ranges are sequentially placed.   The composite structure building has a shape having a portion in which the position of the outer wall is continuously different over a plurality of levels in plan view, and a reference portion for determining the position of the outer wall on the outer end side of the floor slab previously placed The construction method of the composite structure building according to any one of claims 1 to 3.

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