JPS5830979B2 - Construction method of Obarima bridge ditch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method of constructing a large-sized frame, and particularly to a method of constructing a frame used as the roof of a three-dimensional truss in a factory or the like, which has a large-sized space and has the same cross-sectional shape in the girder direction. be.

Conventionally, when constructing an Oharima frame in a factory, etc., it is necessary to set up a temporary stage or shoring for the entire space to assemble the three-dimensional trusses, and it is also necessary to move cranes in sequence or use multiple cranes, etc. Construction is generally difficult, and construction methods have been proposed to deal with this problem.

This invention also relates to an improvement of the construction method, and is aimed at reducing the cost of temporary construction and construction equipment, and increasing the efficiency of construction.The details thereof will be explained below with reference to illustrated embodiments.

In the illustrated embodiment, the columns 1, beams 2 and outer walls 3 are first formed of a reinforced concrete structure.

Further, a temporary assembly stage A is installed at a predetermined position within the building surrounded by the outer wall 3, for example, at one end of the building in the column direction, and a crawler crane B is placed inside the temporary assembly stage A.

Additionally, a groove C for carrying in materials is provided on the floor.

Further, a rail 4 is installed on the upper surface of the beam 2, and a transport cart E on which the erection beam D is placed is installed on the rail 4.

When assembling, the main truss 6 is produced in a factory by dividing it into three lengths in the direction of tension, transporting them into the material carrying groove C, and using a crawler crane B, sequentially lift them onto the thread stage A and connect them. do.

An erection beam D extending from the end of the connected main truss 6 is attached in advance, and the erection beam D is placed on the carriage E.

Furthermore, three of these main trusses 6 are arranged in parallel with an interval corresponding to the spacing between the columns 1, 1, and the sub-trusses, small beams, places, etc. are fixed with high tension, and if necessary, a deck plate is installed on top of the truss and fixed in place. A stable frame 7 with a unit width is constructed between the tension members.

We will also paint and install electrical and air equipment.

Next, the stable frame 7 moves the carriage E laterally, that is, in the column direction, until it reaches the upper part of the predetermined column 1.

Meanwhile, the assembly of the next stable frame 7 of unit width on assembly stage A is started.

Then, the moved stability frame 7 is supported by the jacks F, the carriage E is removed, and by lowering the jacks F, the upper chord of the main truss 6 is installed on the step part 8 of the beam 2, and the main The lower chord member of the truss 6 is located on the side of the lower beam 2', and both the upper and lower chord members are fixed to their end plates and the column 1 by through bolts and nuts.

After that, Election Beam D will be removed.

The stable frames 7 of the unit width that have been moved are separated from each other by the distance between columns in the column direction, and the stable frames 7 are connected to each other by small beams or the like.

By the way, when the stabilizing frame 7 is to be moved laterally, it can be moved by suspending the rail of the transport lane within the building and can be attached to a predetermined position on the wall.

A scaffolding panel 9 is laid on the assembly stage A, and a removable safety net 10 is provided so that the crawler crane B can partially enter.

This invention has the above-mentioned configuration, and since a temporary assembly stage installed at a predetermined position in a building is repeatedly used to assemble a stable frame that constitutes a unit width roof, etc., it is not necessary to install an assembly stage on the entire surface. Furthermore, since there is little need to move lifting equipment such as cranes, temporary construction costs are low and construction can be carried out efficiently.

In addition, work safety is ensured by assembling the stable frame consisting of the main truss, sub-truss, small beams, and deck plates on the assembly stage.Moreover, each stable frame has an erection extending from its end, making it easy to use as a trolley. Since the stable frame is sent out in sequence, the next stable frame can be efficiently assembled on the assembly stage.

Furthermore, since the erection girder overhangs from the stable frame, removal work is easy.

[Brief explanation of the drawing]

Figures 1 and 2 are an elevation view and a plan view showing an overview of the state of implementation of this invention, Figure 3 is a detailed plan view of the assembly stage, and Figures 4 and 5 are a conveyance truck and an erection beam. FIG. 1... Column, 2, 2... Beam, 3...
...Outer wall, 4...Rail, 5...Pin, 6...Main truss, 7...Stability frame,
8... Step section, 9... Scaffolding panel, 1
0... Safety net, A... Assembly stage, B... Cloak crane, C...
Groove for carrying in materials, D...Erection beam,
E...Transfer trolley, F...Judge.

Claims (1)

[Claims] 1. Install a temporary assembly stage at a predetermined location in the building, connect and assemble unit members on the assembly stage to form a stable frame of unit width with a predetermined tension, and provide an erection beam extending from the end of the structure. Next, the erection beam of the stable frame is placed on a transport cart and moved in the column direction, and the stable frames configured on the assembly stage are sequentially moved in the column direction by the same means to mount the required number of stable frames in series. ,
A construction method for large-scale structures that is characterized by the fact that the erection beam is then removed and the building is completed.