Body building method

Abstract

To provide a skeleton construction method capable of improving work efficiency of the skeleton construction.SOLUTION: A skeleton construction method constructs an underground skeleton 2 and an overground skeleton 3 of a building 1. The skeleton construction method comprises: steps S1, S2 of constructing upper and lower steel pipe poles 20 at an interval of one layer as preceding poles 20B, 20C; and a step S4 of constructing the steel pipe pole 20 between the upper and lower preceding poles 20B, 20C as a post-constructed pole 20A and joining the preceding poles 20B, 20C and the post-constructed pole 20A.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a skeleton construction method for constructing the skeleton of a building. [Background technology]

[0002] Conventionally, in order to ensure the flow of construction vehicles, it has been common to leave part of a building unconstructed and perform construction after construction (see Patent Documents 1 to 3). Patent Document 1 describes a building construction method in which part of the foundation structure, such as foundation beams, is left unconstructed and left for later construction, and a construction passage is provided in this later construction part to ensure the passage of construction vehicles and workers. Patent Document 2 shows a method of constructing a building in which a crane is composed of a main body and leg members that support the main body, and horizontal rails on which the leg members can run are attached in multiple stages to main structural members of the building such as pillars and beams, and the main structure of the building is constructed using the crane while the leg members of the crane are raised between the upper and lower horizontal rails. Patent Document 3 shows a method of constructing a building framework in which a rail for a lifting machine is laid on the framework of the floor directly below that has been constructed in advance, and the framework of the construction floor is constructed while moving the lifting machine on this rail for the lifting machine. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-183386 A [Patent Document 2] Japanese Patent Application Publication No. 5-239928 [Patent Document 3] JP 2000-213168 A Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a framework construction method that can improve the work efficiency of framework construction. [Means for solving the problem]

[0005] The inventors have come up with this invention based on the idea that a method of constructing the structure of a building involves constructing the lower leading column, then constructing the upper leading column while constructing the beams, walls, exterior materials, etc., leaving a gap of at least one story, and then erecting a post-construction column between the upper and lower leading columns and joining the leading column and the post-construction column. This allows the space between the upper and lower leading columns to be used as work space while constructing the upper leading column and the structure, thereby improving the work efficiency of structure construction. The structure construction method of the first invention is a structure construction method for constructing a structure (e.g., an underground structure 2 and an above-ground structure 3 described below) of a building (e.g., a building 1 described below), and is characterized by comprising a first step (e.g., steps S1 and S2 described below) of erecting upper and lower column members (e.g., steel pipe column 20 described below) with a gap of at least one story between them to form leading columns (e.g., leading columns 20B and 20C described below), a second step (e.g., steps S4, S11, S12 described below) of erecting a column member (e.g., steel pipe column 20 described below) between the upper and lower leading columns to form a post-built column (e.g., post-built column 20A described below), and a third step (e.g., steps S4, S13 described below) of joining the leading column and the post-built column.

[0006] According to this invention, when constructing the framework of a building, the upper and lower leading columns are erected with a gap of at least one story between them. Therefore, the framework above the leading columns can be constructed while using the space between the upper and lower leading columns as a working space, ensuring a large working area and improving the work efficiency of framework construction.

[0007] In the second aspect of the present invention, the post-assembly columns are arranged on the outer periphery of the building, In the second step, the pillar member is lifted by a lifting machine (e.g., lifting machine 35 described later) via a lifting jig with a balancer whose lifting position is eccentric (e.g., lifting jig 34, 37 described later), and then erected between the upper and lower leading pillars.

[0008] According to this invention, the pillar member is lifted by a lifting machine via a lifting jig with a balancer and erected, so that the lifting jig for lifting the pillar member does not interfere with the preceding pillar above, and the pillar member that will become the subsequent pillar can be erected smoothly.

[0009] The third invention relates to a method of constructing a structural body, wherein the post-installed column is any one of a steel pipe column, a concrete-filled steel pipe column, and a precast concrete column.

[0010] According to this invention, the post-construction column is any one of a steel pipe column, a concrete-filled steel pipe column, and a precast concrete column. Therefore, by joining the leading column and the post-construction column by highly reliable welding or by filling with cement-based materials, the post-construction column can be constructed in a short construction period. Effect of the Invention

[0011] According to the present invention, a skeleton construction method that can improve the work efficiency of skeleton construction can be provided. [Brief description of the drawings]

[0012] [Figure 1] 1 is a side view of a building constructed by a skeleton construction method according to one embodiment of the present invention. [Diagram 2] 1 is a flowchart of a procedure for constructing a building. [Diagram 3] This is an explanatory diagram of the building construction procedure (part 1, showing the completed state of steel frame construction in Section 1). [Figure 4] This is an explanatory diagram of the building construction procedure (part 2, showing the completed state of steel frame construction from section 2 onwards). [Diagram 5] 13 is a flowchart of the procedure for constructing a post-installation CFT column. [Figure 6] This is an explanatory diagram of the construction procedure for a later-installed CFT column (Part 1, with the lower steel pipe column installed). [Figure 7] This is an explanatory diagram of the construction procedure for later-installed CFT columns (Part 2, with the upper steel pipe column installed). [Figure 8]This is an explanatory diagram of the construction procedure for a later-installed CFT column (Part 3, the state after welding of the lower steel pipe column, upper steel pipe column, and preceding column is completed). [Figure 9] FIG. 4 is an explanatory diagram of the construction procedure for a post-construction CFT column (part 4, concrete 21 is pressed into the inside of the post-construction column). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present invention is a method for constructing the structure of a building, in which upper and lower leading columns are constructed as leading structures, and then post-construction columns are erected between the upper and lower leading columns to join the upper and lower leading columns and the post-construction columns. Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a building 1 constructed by a skeleton construction method according to one embodiment of the present invention. The building 1 comprises an underground structure 2 constructed underground, an above-ground structure 3 constructed on the underground structure 2, and an exterior material 4 attached to the outer periphery of the above-ground structure 3.

[0014] The underground structure 2 and the above-ground structure 3 are equipped with CFT (Concrete Filled Steel Tube) columns 10, which are concrete-filled steel pipe columns arranged at predetermined intervals, steel beams 11 that connect these CFT columns 10 together, and floor slabs 12 (see Fig. 6) made of reinforced concrete supported by the steel beams 11. Here, the CFT columns 10 are steel pipe columns 20 serving as column members filled with concrete (see Fig. 3). In addition, in the building 1, there is no floor slab at the second floor level, creating an open-ceiling space. The CFT columns 10 arranged on the periphery of the building 1 are not expected to bear the long-term axial force of the building 1, and are designed to provide shear resistance to earthquake loads. Therefore, the CFT columns 10 on the periphery of the building 1 may be in a state of being cut off midway through the construction process of the building frame, and a steel pipe column may be erected in the cut part as a post-construction work to join the steel pipe columns above and below. Therefore, the CFT column 10 on the first floor of the protruding corner is a post-construction CFT column 10A (shown by diagonal lines in Figure 1). This post-construction CFT column 10A comprises a post-construction column 20A, which is a steel pipe column, and concrete 21 filled in this post-construction column 20A (see Figure 9). The exterior material 4 is a precast concrete panel or an aluminum curtain wall, and is installed above the second floor level.

[0015] The procedure for constructing this building 1 will be described below with reference to the flow chart of FIG. In step S1, an underground skeleton 2 is constructed as shown in Fig. 3. That is, for the underground skeleton 2, concrete is poured into steel pipe columns 20 to construct CFT columns 10. In step S2, as shown in Fig. 3, the steel frame of the first section is erected excluding the rear-mounted column 20A. Specifically, the steel pipe columns 20 and steel beams 11 are erected from the first floor rise to the third floor floor level excluding the rear-mounted column 20A. At this time, temporary supports 30 are erected in the portion of the rear-mounted column 20A to adjust the erection of the steel frame. Here, if the steel pipe columns 20 above and below the rear-mounted column 20A are referred to as leading columns 20B and 20C, there is a gap of one story between the upper and lower leading columns 20B and 20C.

[0016] In step S3, as shown in Fig. 4, the space of the post-assembly columns 20A is used as a work space S to construct the building 1. Specifically, the steel frame is erected from the second section onwards, and concrete 21 is poured into the steel pipe columns 20 on each floor to form CFT columns 10, and floor concrete is poured to construct the floor slab 12. Additionally, the exterior materials 4 are attached. In step S4, the steel pipe column 20 is erected between the upper and lower leading columns 20B, 20C to form a post-installation column 20A, and concrete is poured into this post-installation column 20A to construct a post-installation CFT column 10A.

[0017] Hereinafter, the procedure for constructing the post-installation CFT column 10A in step S4 will be described with reference to the flowchart in FIG. In step S11, as shown in Fig. 6, the lower steel pipe column 40 that becomes the lower part of the rear-mounted column 20A is erected. That is, the column stage 31, horizontal net 32, and ladder 33, which are temporary scaffolding, are attached to the lower steel pipe column 40, and in this state, the lower steel pipe column 40 is lifted by a lifting machine 35 via a lifting jig 34 with a balancer, and erected on the leading column 20B on the lower side of the underground structure 2. The hanging position of the weight and the lifting machine 35 of the hanging jig 34 with a balancer is adjusted so that the hanging jig 34 can maintain a substantially horizontal state when the lower steel pipe column 40 is suspended and supported by the hanging wire 36 attached to the end of the hanging jig 34. Specifically, the hanging position of the lifting machine 35 is eccentric from the approximate center of the hanging jig 34, and is a distance L in the horizontal direction from the hanging position of the lower steel pipe column 40 (the end of the hanging jig 34). 1 It is just a few meters away. At this time, the erection piece 22 of the lower preceding column 20B and the erection piece 41 on the lower end side of the lower steel pipe column are connected with a splice plate or the like (not shown) to temporarily fix the lower steel pipe column 40 on the lower preceding column 20B. The joint between this lower preceding column 20B and the lower steel pipe column 40 is designated as P.

[0018] In step S12, as shown in Fig. 7, the upper steel pipe column 50 which becomes the upper part of the post-assembly column 20A is erected. That is, the upper steel pipe column 50 is lifted by the lifting machine 35 via the lifting jig 37 with a balancer, and erected on the lower steel pipe column 40. The hanging position of the weight and the lifting machine 35 of the hanging jig 37 with a balancer is adjusted so that the hanging jig 37 can maintain a substantially horizontal state when the upper steel pipe column 50 is suspended and supported by the hanging wire 36 attached to the end of the hanging jig 37. The hanging position of the lifting machine 35 is eccentric from the approximate center of the hanging jig 37, and is a distance L in the horizontal direction from the hanging position of the lower steel pipe column 40 (the end of the hanging jig 37). 2 It is just a few meters away. At this time, the erection piece 42 on the upper end side of the lower steel pipe column 40 and the erection piece 51 on the lower end side of the upper steel pipe column 50 are connected with a splice plate or the like (not shown) to temporarily fix the upper steel pipe column 50 on the lower steel pipe column 40. Also, the erection piece 52 on the upper end side of the upper steel pipe column 50 and the erection piece 23 of the upper preceding column 20C are connected with a splice plate or the like (not shown) to temporarily fix the upper steel pipe column 50 to the upper preceding column 20C. Here, the joint between the lower steel pipe column 40 and the upper steel pipe column 50 is Q, and the joint between the upper steel pipe column 50 and the upper preceding column 20C is R.

[0019] In step S13, as shown in Fig. 8, the lower steel pipe column 40, the upper steel pipe column 50, and the leading columns 20B, 20C are welded and joined together. Specifically, the column stage 31, the horizontal net 32, and the ladder 33 are attached to the upper steel pipe column 50. Then, using the floor slab 12 of the first floor, the column stage 31 and the ladder 33 attached to the lower steel pipe column 40, and the column stage 31 and the ladder 33 attached to the upper steel pipe column 50, the joint P between the lower leading column 20B and the lower steel pipe column 40, the joint Q between the lower steel pipe column 40 and the upper steel pipe column 50, and the joint R between the upper steel pipe column 50 and the upper leading column 20C are welded and joined together.

[0020] In step S14, as shown in Fig. 9, concrete 21 is pressed into the post-construction column 20A consisting of the lower steel pipe column 40 and the upper steel pipe column 50. At this time, a predetermined gap d is formed between the upper end surface of the concrete 21 pressed into the post-construction column 20A and the lower end surface of the concrete already filled inside the upper preceding column 20C (here, the horizontal plate 24 inside the upper preceding column 20C). In step S15, as shown in Fig. 9, grout material 62 is injected into the gap d between the concrete in the rear-mounted column 20A and the concrete in the leading column. Specifically, one injection hole 25 and multiple air vent holes 26 are provided in advance on the side surface of the upper leading column 20C, and a metal pipe 27 is connected to the inside of each air vent hole 26, and the tip of this pipe 27 is extended to the vicinity of the horizontal plate 24. Then, an injection hose 60 is connected to the injection hole 25, and a discharge hose 61 is connected to the air vent hole 26, and the grout material 62 is injected into the gap d through the injection hose 60. The injection of the grout material 62 continues until the grout material reaches the vicinity of the upper end of the gap d and the grout material 62 is discharged from the discharge hose 61.

[0021] According to this embodiment, the following effects are obtained. (1) When constructing the building 1, the upper and lower leading columns 20B, 20C were erected with a gap of one story between them. Therefore, the space between the upper and lower leading columns 20B, 20C can be used as the work space S while constructing the framework above the upper leading column 20C, ensuring a wide work area and improving the work efficiency of framework construction. (2) The lower steel pipe column 40 and the upper steel pipe column 50 are lifted and erected by the lifting machine 35 via the lifting jigs 34, 37 equipped with balancers. Since the lifting jigs 34, 37 for lifting the lower steel pipe column 40 and the upper steel pipe column 50 do not interfere with the upper preceding column 20C, the lower steel pipe column 40 and the upper steel pipe column 50, which become the subsequent erection column 20A, can be smoothly erected. (3) The post-assembly column 20A is a CFT column, which is a concrete-filled steel pipe column, and the leading columns 20B, 20C and the post-assembly column 20A are joined by reliable welding and filling with cement-based materials, so that the post-assembly column 20A can be constructed in a short construction period.

[0022] The present invention is not limited to the above-described embodiment, and modifications and improvements within the scope of the present invention that can achieve the object of the present invention are included in the present invention. For example, in the above-described embodiment, the post-construction column 20A is a concrete-filled steel pipe column 10A, but this is not limited thereto, and the post-construction column may be only a steel pipe column, or may be a precast concrete column. [Explanation of symbols]

[0023] 1... Building 2... Underground structure 3... Aboveground structure 4... Exterior material 10...CFT column 10A...Later-built CFT column 11...Steel beam 12...Floor slab 20... Steel pipe column (column member) 20A... Later-installed column 20B... Lower preceding column 20C...Upper leading column 21...Concrete 22...Erection piece of the lower leading pillar 23...Erection piece of the upper leading pillar 24…Horizontal plate inside the upper leading column 25...Injection hole 26...Air vent hole 27...Pipe 30...Temporary support 31...Column stage 32...Horizontal net 33...Ladder 34, 37... Lifting jig 35... Lifting machine 36... Lifting wire 40…Lower steel pipe column 41…Erection piece on the lower end of the lower steel pipe column 42…Erection piece on the upper end of the lower steel pipe column 50...Upper steel pipe column 51...Erection piece at the lower end of the upper steel pipe column 52…Erection piece on the upper end of the upper steel pipe column 60: Injection hose; 61: Discharge hose; 62: Grout material P: Connection between the lower leading column and the lower steel pipe column Q: Connection between the lower steel pipe column and the upper steel pipe column R: Joint between upper steel pipe column and upper preceding column

Claims

1. A method for constructing a skeleton of a building, comprising the steps of: A first step of erecting upper and lower column members with a gap of at least one story between them to form upper and lower leading columns; A second step of erecting a steel pipe column between the upper and lower preceding columns to form a post-erected column; A third step of joining the upper and lower leading columns and the rear-mounted columns; A method for constructing a structural body, comprising: a fourth step of injecting concrete into the inside of the post-built column; and then injecting grout material into the gap between the upper end surface of the injected concrete and the lower end surface of the upper preceding column.

2. The post-assembly columns are arranged on the outer periphery of the building, The structure construction method according to claim 1, characterized in that in the second step, the steel pipe column is lifted by a lifting machine via a lifting jig with a balancer whose lifting position is eccentric, and then erected between the upper and lower leading columns.

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