JPS648152B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for temporarily constructing a scaffold in a frame structure of an SRC building, and more specifically to a method for temporarily constructing a scaffold that makes it possible to reduce the labor and cost of constructing scaffolds installed in the row direction. be.

Conventionally, in the frame structure of SRC buildings,
Because all the scaffolding in the girder direction was suspended, it took time and effort to temporarily erect the scaffolding, reducing construction efficiency and increasing temporary construction costs.

In other words, a suspended scaffold consists of a hanger that is attached to the lower flange of a steel beam and a steel scaffolding plate of a fixed length that is stretched between the hangers, so in order to install a suspended scaffold over the entire length of the girder Before the steel beams are erected, a large number of hangers must be attached to each steel beam at regular pitches (at intervals corresponding to the length of the steel scaffolding boards), and this installation is extremely time-consuming. Furthermore, after the steel beams were erected, it took a considerable amount of time and effort to hang the steel scaffolding boards between the hangers, since a large number of hangers and steel scaffolding boards were used.

In addition, suspended scaffolding is quite expensive,
Since a large amount of this was used over the entire length in the column direction, temporary equipment was expensive.

The present invention aims to eliminate these conventional drawbacks.

Therefore, the present invention assembles a girder beam pre-assembly in which cage-shaped beam reinforcing bars made of beam main reinforcements and stirrups are attached around a beam steel frame made of H-shaped steel, and a scaffold board is placed on the top surface of the beam reinforcing bars. In addition to placing and fixing the
One hanger is attached to the lower flange of the steel beam at each end of the steel beam, and a plurality of girder girder end assemblies that have undergone the above steps are erected between the column steel frames erected at predetermined intervals. Then, steel scaffolding boards of a fixed length were hung between the hangers at the ends of the girder and girder front assemblies located on both sides of each column steel frame, and suspended scaffolding was formed only around the column and beam joints, and each girder row The above objective was achieved by extending a parent net between the steel columns above the beam end assembly.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for temporarily constructing a scaffold in a frame structure of an SRC building according to the present invention will be explained based on an embodiment shown in the drawings.

Figure 1 shows the state in which the temporary construction of scaffolding in the girder direction has been completed, where A is the column steel frame, B is the girder beam end assembly, C is the beam end assembly in the span direction, and D is the construction only around the column and beam joints. E is a scaffolding board, and F is a parent net.

The scaffold mentioned above was temporarily erected as follows.

(1) As shown in Figures 2 and 3, a basket-shaped beam reinforcing bar 4 is formed around a beam steel frame 1 made of H-beam steel by a required number of beam main bars 2 and stirrups 3 using spiral bars. Assemble the girder end assembly B to which the girder is attached. Then, a scaffold board 5 made of an inexpensive material such as a wooden board or plywood is placed on the upper surface of the beam reinforcing bar 4, and fixed by wrapping a wire (not shown) around it. This scaffolding board 5 is set to a length such that at least both ends thereof overlap the ends of the above-mentioned hanging scaffolding D. Moreover, one hanger 6, 6' is attached to the lower flange 1a of the beam steel frame 1 only at both ends of the beam steel frame 1.

(2) A plurality of girder and beam end assemblies B that have undergone the above steps are erected between the column steel frames A that are erected at predetermined intervals. Prior to this work, the steel scaffolding board 7 of the fixed length shown in Fig. 1 is placed on the scaffolding board 5 of the girder beam end assembly B that comes to one side of the column steel A, and is temporarily secured with grid lines, etc. I'll keep it. Incidentally, the span direction beam end assembly C is usually constructed between the column steel frames A prior to the girder beam front assembly B, and the spiral hoop reinforcements 8 are set on the column steel A in advance.

(3) After constructing the frame according to the above process, one of the girder beam front assemblies B The above-mentioned steel scaffolding board 7 placed on the frame is hung over to form a hanging scaffold D only around the column and beam joints. Before and after this work, the main net F is stretched between the column steel frames A above each girder-beam end assembly B.

With the above steps, the temporary construction of the scaffolding is completed. Therefore, final tightening of bolts and nuts, welding work between the column steel frame A and the beam steel frame 1, etc. performed at the column-beam joint can be safely performed using the suspended scaffold D. In addition, the movement of workers in the row direction (movement from one suspended scaffold D to another suspended scaffold D) is performed by walking on the scaffolding board 5, but the main net F is used as a handrail, and each worker The equipped life net is locked to the main net F, and the main net F allows movement in the row direction while ensuring safety.

The present invention has the above-mentioned configuration, and suspending scaffolds are provided only around the column and beam joints necessary for the work, and movement between the suspended scaffolds is achieved by placing and fixing them on the top surface of the beam reinforcing bars in advance before the girder beam end assembly is erected. Since this work was carried out using a main net stretched between the scaffolding boards and the steel columns, the number of expensive hanging scaffolds used was drastically reduced, which not only reduced temporary construction costs, but also made it easier to assemble on the ground. The time and effort involved in determining the mounting position of the hanger with respect to the beam steel frame of the girder girder end assembly and the time and effort required to span the steel scaffolding boards between the hangers are greatly reduced, and this has the effect of improving construction efficiency.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view showing a state in which temporary scaffolding has been completed, FIG. Figure 3 is a longitudinal sectional view of the same as above. A...Column steel frame, B...Girder beam end assembly, D...Hanging scaffold, F...Main net, 1...Beam steel frame, 4...Beam reinforcing bar, 5...Scaffold board, 6, 6'... ...Hanger, 7...
...Standard length steel scaffolding board.

Claims (1)

[Claims] 1. Assembling the girder girder end assembly in which cage-shaped beam reinforcing bars made of beam main bars and stirrups are attached around a beam steel frame made of H-shaped steel, and placing and fixing a scaffold board on the top surface of the beam reinforcing bars, One hanger is attached to the lower flange of the steel beam at each end of the steel beam, and a plurality of girder girder end assemblies that have undergone the above steps are erected between the column steel frames erected at predetermined intervals. Then, a fixed-length steel scaffolding board was hung between the hangers at the ends of the girder and girder front assemblies located on both sides of the column steel frame to form a hanging scaffold only around the column and beam joints.
A temporary scaffolding method for the frame structure of an SRC building, characterized by stretching a parent net between the steel columns above the girder and beam end assembly.