Steel frame construction method

Abstract

To provide a technique capable of easily securing the erection accuracy of a steel frame column while improving working efficiency in a steel frame erection method for fixing the steel frame column to a foundation.SOLUTION: In a steel frame erection method in which a steel column 11 is fixed to a foundation 1 by executing a concrete placing process for placing concrete in a column base part insertion hole 2 after executing a steel column installation process for installing the steel column 11 in which the column base part 11a is inserted into the column base part insertion hole 2 formed in the foundation 1 in a suspended state suspended by timbering 40, a column-beam frame 50 formed by connecting a plurality of steel columns 11 installed in a suspended state to each other by steel beams 15,21,22 is assembled in a steel column installation process.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a steel frame erection method for fixing a steel frame column to a foundation. [Background technology]

[0002] A steel frame erection method is known in which a steel frame column with a column base inserted into a column base insertion hole formed in the foundation is installed in a suspended state by supports, and concrete is poured into the column base insertion hole to fix the steel frame column to the foundation (see, for example, Patent Document 1). With this steel frame erection method, it is possible to eliminate anchor bolts for fixing the column base of the steel frame column to the foundation, thereby improving work efficiency. Furthermore, when constructing a steel-frame building using such a steel frame construction method, it is common practice to first secure multiple steel columns to the foundation using the steel frame construction method, and then to connect the steel columns with steel beams to assemble a column-beam frame. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3703740 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when assembling a beam-column frame by connecting steel beams to multiple steel columns after completing the fixing of the steel columns to the foundations using the steel frame erection method described in Patent Document 1, it becomes difficult to ensure the erection accuracy of the steel columns due to misalignment of the joining positions of the steel columns to the steel beams, etc. In particular, when the steel columns are exterior columns, there is a problem in that poor erection posture has a negative impact on the appearance. In view of this situation, the main object of the present invention is to provide a technology that can easily ensure the erection accuracy of a steel column while improving work efficiency in a steel frame construction method in which a steel column installation process is carried out in which a steel column with a column base inserted into a column base insertion hole formed in a foundation is installed in a suspended state by shoring, and then a concrete pouring process is carried out in which concrete is poured into the column base insertion hole to fix the steel column to the foundation. [Means for solving the problem]

[0005] A first characteristic configuration of the present invention is a steel frame erection method in which a steel frame column having a column base inserted into a column base insertion hole formed in a foundation is installed in a suspended state by a support, and then a concrete pouring process is carried out to pour concrete into the column base insertion hole, thereby fixing the steel frame column to the foundation, In the steel column installation step, a column-beam frame is assembled by connecting the plurality of steel columns installed in the suspended state by joining steel beams erected on the plurality of steel columns, and the plurality of steel columns are suspended by supporting the steel beams with the supports; In the concrete pouring process, which is carried out after the steel column installation process is completed, concrete is poured into the column base insertion hole while the steel column is left in the suspended state, and the concrete is allowed to harden. A second characteristic configuration of the present invention is a steel frame erection method in which a steel frame column having a column base inserted into a column base insertion hole formed in a foundation is installed in a suspended state by a support, and then a concrete pouring process is carried out to pour concrete into the column base insertion hole, thereby fixing the steel frame column to the foundation, In the steel column installation step, a column-beam frame is assembled by connecting the plurality of steel columns installed in the suspended state by joining the steel beams erected on the plurality of steel columns, and the column-beam frame is assembled. to The steel beam is joined to the upper end side of each of the plurality of steel columns, In the concrete pouring process, which is carried out after the steel column installation process is completed, concrete is poured into the column base insertion hole while the steel column is left in the suspended state, and the concrete is allowed to harden.

[0006] According to this configuration, in the steel column installation process, when multiple steel columns are installed on supports in a suspended state, the erection accuracy of the multiple steel columns can be relatively easily ensured. Furthermore, in the steel column installation process, the column-beam frame is assembled in a form in which the multiple steel columns installed in a suspended state are connected to each other by steel beams, so that the erection accuracy of each steel column included in the column-beam frame can be automatically ensured by this assembly. Thereafter, the concrete pouring process is carried out, and each steel column can be fixed to the foundation in a state in which the erection accuracy is ensured. Therefore, the present invention provides a technology that can easily ensure the erection accuracy of steel columns while improving work efficiency in a steel frame construction method in which a steel column installation process is carried out in which a steel column with a column base inserted into a column base insertion hole formed in a foundation is installed in a suspended state by supports, and then a concrete pouring process is carried out in which concrete is poured into the column base insertion hole to fix the steel column to the foundation.

[0007] The present invention 3 A characteristic feature of this method is that the joints in the beam-column structure are permanently fixed in the steel column installation process.

[0008] According to this configuration, in the steel column installation step, when assembling a column-beam frame formed by connecting multiple steel columns installed in a suspended state with steel beams, the joints in the column-beam frame can be fully fixed in advance, allowing for efficient and rational construction of the column-beam frame.Furthermore, in the subsequent concrete pouring step, when concrete is poured into each of the column base insertion holes into which the column bases of the multiple steel columns have been inserted, the joints in the column-beam frame including the multiple steel columns have been fully fixed and the multiple steel columns are firmly fixed, thereby preventing deterioration in the erection accuracy of the multiple steel columns due to concrete pouring.

[0009] The present invention 4 A characteristic configuration is to carry out a steel column unit manufacturing process in which a steel column unit is manufactured by connecting a plurality of steel columns arranged side by side along a predetermined first horizontal direction with steel beams, before carrying out the steel column installation process; In the steel column installation process, multiple steel column units are arranged side by side along a second horizontal direction perpendicular to the first horizontal direction, and the multiple arranged steel column units are connected together with steel beams to assemble the column-beam structure.

[0010] According to this configuration, the assembly work of the column-beam structure, in which multiple steel columns installed in a suspended state in the steel column installation process are connected by steel beams, is carried out at a relatively high altitude. However, since the steel column units included in the column-beam structure are pre-fabricated in the steel column unit manufacturing process before the steel column installation process is carried out, the work at height in the steel column installation process can be simplified, thereby improving workability and safety. Furthermore, the steel column unit manufacturing process involves simply connecting multiple steel columns arranged in a row along a first horizontal direction, so the steel column units can be assembled on the ground with simple work without using special jigs or the like such as temporary supports for steel columns. On the other hand, the column-beam frame assembly process involves simply arranging multiple steel column units in a row along a second horizontal direction perpendicular to the first horizontal direction while holding them in a suspended state with supports, and then connecting them with steel beams, so the work can be carried out efficiently. 。 [Brief explanation of the drawings]

[0011] [Figure 1] Elevation diagram showing the state after the steel column unit manufacturing process and steel column installation process have been completed [Figure 2] A perspective view showing the state after the steel column installation process [Figure 3] Elevation diagram showing the state after the concrete pouring process [Figure 4]Elevation diagram showing the state after the roof truss unit installation process [Figure 5] Elevation drawing showing the state after the finishing process DETAILED DESCRIPTION OF THE INVENTION

[0012] An embodiment of a steel frame erection method according to the present invention will be described with reference to the drawings. The steel frame erection method of this embodiment, the details of which will be described later, is configured as a construction method for constructing a steel frame building 100 as shown in Fig. 5 by sequentially carrying out a steel column unit manufacturing process, a steel column installation process, a concrete pouring process, a roof truss unit installation process, and a finishing process. This steel frame building 100 has a structure in which a gable roof section 100A is located in the center, and on both eaves sides of the gable roof section 100A, shed roof sections 100B are located, each with approximately the same slope as the gable roof section 100A. Below, the details of each step that constitutes the steel frame erection method of this embodiment will be explained in order. In this embodiment, the horizontal direction parallel to the gable faces of the gable roof section 100A and the shed roof section 100B (the plane of the paper in Figures 1, 3, 4, and 5) is called the first horizontal direction X, and the direction perpendicular to the first horizontal direction X, that is, the direction of the girders of the gable roof section 100A and the shed roof section 100B (the depth direction in Figures 1, 3, 4, and 5), is called the second horizontal direction Y.

[0013] (Steel column unit manufacturing process) In this steel column unit manufacturing process, steel column units 10 (see FIG. 1) used for both shelving roof sections 100B (see FIG. 5) are manufactured by ground assembly. As shown in FIG. 1, this steel column unit 10 is formed by connecting multiple steel columns 11 arranged side by side along a first horizontal direction X with ascending beams 15, which are steel beams. Specifically, outer columns 11A, which are the steel columns 11 supporting the eaves sides of both shelving roof sections 100B, and inner columns 11B, which are the steel columns 11 supporting the ridge sides of both shelving roof sections 100B, are arranged in parallel, and these outer columns 11A and inner columns 11B are joined to both ends of the ascending beams 15. In other words, the manufacturing work for the steel column units 10 in this steel column unit manufacturing process simply involves connecting multiple steel columns 11 arranged side by side along one first horizontal direction X via ascending beams 15 that also extend along the first horizontal direction X. Therefore, no special jigs or the like are required as temporary support fixtures for the steel column 11, and the steel column unit 10 can be assembled on the ground with simple work. Furthermore, in the outer column 11A, the joint 17 of the ascending beam 15 is located at its upper end, but in the inner column 11B, the joint 17 of the ascending beam 15 is located slightly below its upper end, and the inner column 11B has a structure in which it protrudes above the joint 17 with the ascending beam 15.

[0014] Although detailed illustration is omitted, the joint 17 between the steel column 11 and the ascending beam 15 is configured as a bolted joint or a welded joint, and at this stage of the process, the fixed state at this joint 17 is a temporary fixed state, which is the state before permanent fixing is performed. In other words, if the joint 17 is a bolted joint, the temporary fixed state is the state where the bolts have been temporarily tightened, and if the joint 17 is a welded joint, the temporary fixed state is the state where temporary welding has been performed. In this embodiment, the steel column unit 10 is fabricated by assembly on site, but it may be fabricated at another location such as a factory.

[0015] (Steel column installation process) In this steel column installation process, which is carried out after the above steel column unit manufacturing process, as shown in Figures 1 and 2, a steel column 11 with a column base 11a inserted into a column base insertion hole 2 formed in a foundation 1 is installed in a suspended state by a support 40. Specifically, first, a pair of supports 40 with scaffolding boards 41 extending in the second horizontal direction Y are arranged along the first horizontal direction X. Next, a plurality of steel column units 10 manufactured in the above steel column unit manufacturing process are installed in parallel across the entire sheave roof section 100B along the second horizontal direction Y in a state where they are erected across the pair of supports 40. Then, the plurality of steel column units 10 arranged side by side along the second horizontal direction Y are connected to each other via connecting beams 21, 22, 23, which are steel beams extending in the second horizontal direction Y, and a column-beam structure 50 is assembled as the steel skeleton of the shed roof section 100B, which is made up of the plurality of steel column units 10 and connecting beams 21, 22, 23. At this time, since the steel column units 10 are fabricated in advance in the steel column unit fabrication process, work at height on the scaffolding boards 41 in this steel column installation process is simplified. Furthermore, since it is only necessary to arrange the plurality of steel column units 10 side by side along the second horizontal direction Y and erect the connecting beams 21, 22, 23 between them, the work can be carried out efficiently.

[0016] The connecting beams 21, 22, 23 erected between adjacent steel column units 10 include a connecting beam 21 erected between the upper ends of adjacent outer columns 11A along the second horizontal direction Y, a connecting beam 22 erected between the joints 17 of the ascending beams 15 of adjacent inner columns 11B along the second horizontal direction Y, and a connecting beam 23 erected between the upper ends of adjacent inner columns 11B along the second horizontal direction Y. Although not shown in detail, joints 25 between the steel column 11 and the connecting beams 21, 22, 23 are configured as bolt joints or weld joints.

[0017] In this steel column installation process, the work of assembling the column-beam frame 50 is performed using scaffolding boards 41 provided on the shoring 40. During this assembly work, the erection posture of each steel column 11 is adjusted while the joints 17, 25 between the steel column 11 and the steel beams 15, 21, 22, 23 are finally fixed. That is, if the joints 17, 25 are bolted joints, the final fixed state is when the bolts have been finally tightened, and if the joints 17, 25 are welded joints, the final fixed state is when the final welding has been performed. Then, once the final fixing of each joint 17, 25 is complete, each steel column 11 installed in a suspended state is firmly fixed, ensuring erection precision.

[0018] (Concrete pouring process) In the concrete pouring process that is carried out after the steel column installation process, concrete 7 is poured into each column base insertion hole 2 into which the column base 11a of each steel column 11 installed in a suspended state is inserted, as shown in Figure 3. Then, as this poured concrete 7 hardens, each steel column 11 of the column-beam structure 50 that forms the steel skeleton of the shed roof section 100B becomes fixed to the foundation 1. In the steel column installation process carried out prior to the concrete pouring process, the column and beam structure 50 is assembled in a suspended state, which improves work efficiency while easily ensuring the erection accuracy of each steel column 11 of the column and beam structure 50. Furthermore, in the concrete pouring process, the final fixing of each joint 17, 25 in the column and beam structure 50 is completed and each steel column 11 is firmly fixed, which prevents the pouring of concrete 7 from deteriorating the erection accuracy of each steel column 11.

[0019] Studs 13 can be provided on the outer periphery of the base 11a of each steel column 11 to be embedded in the concrete 7 and ensure pull-out force. Furthermore, to prevent horizontal displacement of the base 11a in the base insertion hole 2 when the concrete 7 is poured, the base 11a can be temporarily fixed with temporary fixing materials such as angle irons or reinforcing bars, although this is not shown in the drawings. Furthermore, in Figures 1 to 3 and the above explanation, we have explained the construction method for the shed roof section 100B located on the left side of the steel-framed building 100 in Figure 5, but the shed roof section 100B located on the right side is also constructed in the same manner.

[0020] (Roof truss unit installation process) In the roof truss unit installation process, which is carried out after the concrete pouring process, roof truss units 30 that form the steel frame of the gable roof section 100A are erected between the column and beam structures 50 that form the steel frame of the shed roof section 100B constructed on both the left and right sides, as shown in Figure 4. Specifically, multiple roof truss units 30 that have been pre-assembled on the ground are arranged side by side along the second horizontal direction Y, erected between the left and right column and beam structures 50. Then, the multiple roof truss units 30 arranged side by side along the second horizontal direction Y are connected, and the frame of the gable roof section 100A consisting of these multiple roof truss units 30 is assembled. Furthermore, work subsequent to the roof truss unit installation process is carried out using scaffolding boards 41 attached to the support structure 40 used to support the steel column unit 10 and the column-beam structure 50 in a suspended state during the steel column installation process, so the support structure 40 with the scaffolding boards 41 remains even after the concrete 7 poured into the column base insertion holes 2 has hardened and each steel column 11 of the column-beam structure 50 has been fixed to the foundation 1.

[0021] (Finishing process) In the finishing process carried out after the roof truss unit installation process, as shown in Figure 5, eaves steel members 32 are attached to the eaves of each of the gable roof section 100A and the shed roof sections 100B located on both sides of it, and then roof finishing members 34 are installed, completing the steel-frame building 100.

[0022] [Another embodiment] Other embodiments of the present invention will be described below. Note that the configurations of the embodiments described below are not limited to being applied independently, but can also be applied in combination with the configurations of other embodiments.

[0023] (1) In the above embodiment, the joints 17, 25 in the column-beam structure 50 are configured to be fully fixed in the steel column installation process. However, the joints 17, 25 may be temporarily fixed in the steel column installation process, and the fully fixed joints 17, 25 may be configured to be fixed after the concrete pouring process.

[0024] (2) In the above embodiment, in the steel column unit manufacturing process, steel column units 10 are manufactured in advance by connecting steel columns 11 with ascending beams 15, and in the subsequent steel column installation process, multiple steel column units 10 are arranged side by side in a suspended state and connected with connecting beams 21, 22, and 23 to assemble the column-beam structure 50. However, it is also possible to install multiple steel columns 11 in a suspended state in the steel column installation process without performing the steel column unit manufacturing process, and then connect them with ascending beams 15 and connecting beams 21, 22, and 23 to assemble the column-beam structure 50. [Explanation of symbols]

[0025] 1 Basics 2 Column base insertion hole 7. Concrete 10 Steel column units 11 Steel column 11A Exterior column (steel column) 11B Interior column (steel column) 11a Column base 15 Climbing beam (steel beam) 21 Connecting beam (steel beam) 22 Connecting beam (steel beam) 23 Connecting beam (steel beam) 40 Shoring 50 Column beam frame X 1st horizontal direction Y 2nd horizontal direction

Claims

1. A steel frame erection method in which a steel frame column having a column base inserted into a column base insertion hole formed in a foundation is installed in a suspended state by supports, and then a concrete pouring process is carried out to pour concrete into the column base insertion hole, thereby fixing the steel frame column to the foundation, In the steel column installation step, a column-beam frame is assembled by connecting the plurality of steel columns installed in the suspended state by joining steel beams erected on the plurality of steel columns, and the plurality of steel columns are suspended by supporting the steel beams with the supports; In the concrete pouring process, which is carried out after the steel column installation process is completed, concrete is poured into the column base insertion hole while the steel column is left suspended in the air, and the concrete is allowed to harden. This is a steel frame construction method.

2. A steel frame erection method in which a steel frame column having a column base inserted into a column base insertion hole formed in a foundation is installed in a suspended state by supports, and then a concrete pouring process is carried out to pour concrete into the column base insertion hole, thereby fixing the steel frame column to the foundation, In the steel column installation step, a column-beam frame is assembled by connecting the plurality of steel columns installed in the suspended state by joining steel beams erected on the plurality of steel columns, and when assembling the column-beam frame, the steel beams are joined to the upper end sides of each of the plurality of steel columns, In the concrete pouring process, which is carried out after the steel column installation process is completed, concrete is poured into the column base insertion hole while the steel column is left suspended in the air, and the concrete is allowed to harden. This is a steel frame construction method.

3. The steel frame erection method according to claim 1 or 2, wherein the steel column installation step includes final fixing of the joints in the column-beam structure.

4. Before the steel column installation process is performed, a steel column unit fabrication process is performed to fabricate a steel column unit by connecting a plurality of steel columns arranged side by side along a predetermined first horizontal direction with steel beams, A steel frame construction method according to any one of claims 1 to 3, wherein in the steel column installation process, a plurality of the steel column units are arranged in parallel along a second horizontal direction perpendicular to the first horizontal direction, and the plurality of arranged steel column units are connected to each other with steel beams to assemble the column-beam structure.

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