JPH0333781Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is used for foundations, quays,
This article relates to parallel flange box panels used for earth retaining or continuous underground walls.

[Conventional technology]

In the civil engineering and construction fields, various panels constructed by combining various types of steel sheet piles, reinforcing bar cages, and steel plates are used.Recently, as various structures in the civil engineering and construction fields have become larger, they are being used for foundations and continuous underground walls. The panels used have also gradually become larger.

Figure 4 shows the inventor's earlier application (Patent Application No. 61-92657).
This is a schematic plan view showing a part of the reinforcing bar material for continuous underground walls according to No.), in which the square steel pipe sheet piles 1a and 1b are connected using an engagement joint to form the reinforcing bar material 2. , 1b, engagement joints 3a to 3h made of half pieces of straight steel sheet piles are joined to the respective end face corners of the flange walls 4a to 4d along the horizontal axis direction,
Parallel flange box panels are used for structures such as earth retaining, foundations, underground walls, wells, and cells.They are driven into the ground using the impact method, or are connected to form panels using the muddy drilling method. It is built into an excavated trench.

In addition, as shown in FIG.
Web steel plates 6a, 6b are welded at appropriate intervals to a, 5b to form a box with a grid-like cross section, and female joints 7a, 7b and male joints 8a, 8b are welded to the ends of the flange steel plates 5a, 5b. A panel for a continuous underground wall made of is disclosed in Japanese Patent Application Laid-Open No. 55-68921.

In addition, Japanese Patent Publication No. 60-6419 discloses a panel 10 in which scalene H-beams 9a to 9c are connected as a reinforcing bar material for continuous underground walls, as shown in FIG.

[Problem that the invention attempts to solve]

When the pile shown in Figure 4 is connected to form a panel, it requires a large number of joints, which results in a somewhat high cost, and the results of testing the panels shown in Figures 5 and 6 In addition to cutting, assembling, and welding the steel plates, processing and welding of the joints requires a large amount of processing cost, resulting in a considerably high cost. It has been found that the longer the panel becomes, the higher the processing cost becomes, which poses a problem in terms of economy.

The object of the present invention is to provide a panel for continuous underground walls that has high structural reliability and is inexpensive to manufacture.

[Means for solving problems]

In order to solve the above-mentioned problems, the present inventors conducted various studies and found that the corners of a plurality of square steel pipes are welded and connected with a plurality of flat steel plates to form a parallel flange box, and the box is engaged with the end face corner of the box. We succeeded in achieving the desired purpose by devising a parallel flange box panel made by welding and connecting joints.

[Effect]

The parallel flange box panel according to the present invention has a wide variety of dimensions and a wide selection range, and can use inexpensive ready-made square steel pipes, so it is highly adaptable to requirements and can be designed economically. Therefore, when there is a large demand for parallel flange box panels of new sizes, newly designed roll-formed square steel pipes or pressed square steel pipes are adopted, but they can also be manufactured economically for the reasons described below. It is.

In addition, when manufacturing conventional parallel flange box panels by cutting thick plates, the amount of welding is extremely large, but in the parallel flange box panel of this invention, the corners of square steel pipes are welded and connected with flat steel plates. Since this method is adopted, there are fewer welding locations and welding costs can be reduced. Furthermore, when using square steel pipes manufactured by die pressing or round steel pipes manufactured by roll forming, there is no need to prepare bevels at the corners, further reducing welding costs. .

Furthermore, in manufacturing the parallel flange box panel of the present invention, if flat steel plates of different widths are used to connect the corners of square steel pipes, arc-shaped panels with arbitrary curvature can be economically produced for various purposes. can be produced.

In addition, the parallel flange box panel of the present invention has almost no dimensional restrictions when manufacturing, so it is possible to economically manufacture extremely large unit panels with engagement joints at the ends, and even large It is highly used for purposes such as building foundations and earth retaining.

〔Example〕

Hereinafter, embodiments of the parallel flange box panel (hereinafter simply referred to as the panel) of the present invention will be described in detail.

FIG. 1 shows corners 12a and 12 of square steel pipes 11a and 11b obtained by further roll forming a circular steel pipe manufactured by press working or roll working.
b, 13a, 13b are welded and connected with flat steel plates 14a, 14b of the same width and thickness, respectively, to form a parallel flange box, and then the end face corners 15a, 15b,
Engagement joints 17a to 17 are provided to 16a and 16b, respectively.
Parallel flange box panel 1 made by welding d
8 is a plan view of FIG.

The square steel pipe used in the present invention is a square steel pipe manufactured by die pressing a steel plate as described above, or a round steel pipe made from a flat steel plate by continuous roll processing, and further processed by continuous roll processing. Square steel pipes made by grouping square steel pipes and square steel pipes made by butt-joining channel steel manufactured by hot rolling, and it is possible to use either ready-made products other than those mentioned above or newly designed and manufactured square steel pipes. Not even.

As mentioned above, the panel of the present invention uses low-cost square steel tubes that have a large degree of freedom in dimensions and can be mass-produced, so panels with any section modulus can be planned and manufactured as appropriate, and there is no welding required to manufacture the panels. Manufacturing costs can be significantly reduced, as less jigs and tools are required, and because handling is easy, less manpower is required.

In addition, if the engaging joints 17a to 17d are made of half straight steel sheet piles manufactured by hot rolling as shown in Fig. 1, it is extremely advantageous in terms of cost, and the strength of the joint engagement and water-tightness are improved. It is also highly reliable.

In addition, FIG. 2 shows square steel pipes 19a to 19c formed by welding together the aforementioned hot-rolled channel steels, which are welded and connected using flat steel plates 20a to 20d of the same width as in FIG. Engagement joint 17e-1
7h is a plan view of a parallel flange box panel 22 manufactured by welding.

Since the square steel pipes 19a to 19c are mainly made of large channel steel manufactured by a universal mill, they have the feature that they can be made longer and thicker, and the material of the corner parts is made of bent plate material. Because it is exceptionally sound compared to welded or plate welded materials,
It has the advantage of excellent structural properties as a panel and low manufacturing cost.

Alternatively, instead of the hot-rolled channel steel shown in Figure 2, channel steel produced by die pressing can be used to produce square steel pipes in the same way, and panels can be produced by welding and connecting them with flat steel plates. . In this case, there is a greater degree of dimensional freedom in design in terms of cross-sectional area, but in terms of length it is slightly disadvantageous compared to rolled channel steel. However, when welding corners, there is no need to prepare a groove, which is advantageous in terms of welding costs.

Next, FIG. 3 is a schematic plan view of a bent panel according to an embodiment of the parallel flange box panel of the present invention, in which square steel pipes 23a and 23b are connected by flat steel plates 24a and 24b having different widths. In addition, male pipe joints 25a, 25b and female pipe joints 26a, 26b are joined to the corner portions of the end faces of the square steel pipes 23a, 23b to form a panel, and the width of the flat steel plates 24a, 24b is adjusted appropriately. By designing this, it is possible to economically manufacture arc-shaped panels having arbitrary curvature, and these are suitably used for, for example, annular wells.

Next, a specific example of design specifications regarding the panel of the present invention will be explained.

Length of one side is 300~600mm, plate thickness is 6~50mm, length
Two to five 10 to 20 m square steel pipes are connected using flat steel plates of approximately the same thickness, and the plate thickness is 9.5 mm to 12.7 mm and the plate width is 400 mm.
Engagement joints made by cutting straight steel sheet piles in half and diameter 100
~200mm seamless steel pipe is gas-cut to form a slit for engagement and a female joint with a diameter of 50~100mm.
A unit panel is manufactured by joining a combination engagement joint with a male joint made of mm ERW pipe, and the foundations and earth retaining of various buildings are constructed by pouring and erecting, and satisfactory results are obtained. It was done.

[Effect of idea]

The parallel flange box panel of the present invention is inexpensive to manufacture, has a large degree of freedom in dimensions, is structurally strong, and has great practical effects.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of a parallel flange box panel according to an embodiment of the present invention, and FIG. 2 is a schematic plan view of a parallel flange box panel according to another embodiment of the present invention.
FIG. 3 is a schematic plan view of a parallel flange box panel according to an embodiment of the present invention, FIG. 4 is a schematic plan view of a parallel flange box panel according to an earlier application by the present inventors, and FIGS. Each figure is a schematic plan view of a conventional panel. 1a, 1b...Square steel pipe sheet pile, 2...Reinforcement material, 3
a to 3h... Engagement joint, 4a to 4d... Flange wall, 5a, 5b... Flange steel plate, 6a, 6b...
...Web steel plate, 7a, 7b...Female joint, 8a-8
b...male joint, 9a-9c...scalene H-shaped steel, 1
0...Panel, 11a-11b...Square steel pipe, 12
a, 12b... corner, 13a, 13b... corner,
14a, 14b... flat steel plate, 15a, 15b...
End face corner, 16a, 16b... end face corner, 17a
~17h... Engagement joint, 18... Parallel flange box panel, 19a, 19b... Square steel pipe, 20
a to 20d... Flat steel plate, 21a to 21d... End face corner, 22... Parallel flange box panel, 2
3a, 23b...Square steel pipe, 24a, 24b...Flat steel plate, 25a, 25b...Pipe male joint, 26
a, 26b... Pipe female joint.

Claims (1)

[Scope of utility model registration request] A parallel flange box panel in which the corners of a plurality of square steel pipes are welded and connected with a plurality of flat steel plates to form a parallel flange box, and engaging joints are welded to the end face corners of the box.