JP7079448B2 - Joint structure of H-shaped steel pile - Google Patents

Description

The present invention relates to a joint structure of H-shaped steel piles, and is mainly used for joining H-shaped steel piles constructed as gantry piles of a work platform on the same vertical line with as few joining bolts as possible.

In the field of construction and civil engineering, a work platform and a boarding pier will be constructed to secure a work space for construction machinery, passage of construction vehicles, and a temporary storage space for materials prior to the main construction work.

This type of work gantry / entry pier is generally composed of gantry piles (support piles), large pulls (girder supports), lining plates, etc., and H-shaped steel piles are mainly used for the gantry piles.

By the way, when constructing an H-shaped steel pile as a gantry pile, the H-shaped steel pile may sink under its own weight because the root hardening liquid of the pile is not hardened as planned. In such a case, the H-shaped steel pile is connected and the pile length is raised to the required length.

Conventionally, when joining H-shaped steel piles to each other, the ends of the upper and lower H-shaped steel piles are butted on the same material axis, and the joining plates are attached to one or both sides of the butted portion between the upper and lower flange ends and the web ends. (Cover plate) was attached to each, and the joint plate was bolted to the upper and lower flange ends and the upper and lower web ends with a plurality of joint bolts.

Japanese Unexamined Patent Publication No. 2011-063967

However, since many joining bolts are used to join the upper and lower H-shaped steel piles, there is a problem that it takes a lot of time and effort to tighten and remove the joining bolts when installing and removing the work platform. was there.

In particular, since it takes time to tighten the joint bolts when installing the H-shaped steel piles, the pile holes may collapse during the tightening of the joint bolts, causing the piles to stop at a high level.

The present invention has been made to solve the above problems, and can easily and strongly join H-shaped steel piles, which are mainly constructed as gantry piles for work gantry, with as few joint bolts as possible on the same vertical line. It is an object of the present invention to provide a joint structure of H-shaped steel piles.

The present invention is an invention of a joint structure of H-shaped steel piles for joining upper and lower H-shaped steel piles arranged on the same vertical straight line, and is attached to the facing joint end faces of the upper and lower H-shaped steel piles, respectively, and described above. The upper and lower end plates formed by communicating a plurality of upper and lower bolt holes at positions symmetrical with respect to the strong axis and the weak axis in the cross section of the H-shaped steel pile in the direction perpendicular to the axis, and the upper side surface of the upper end plate. It is characterized by having a plurality of upper and lower reinforcing ribs attached to symmetrical positions on the lower side surface of the lower end plate, and a plurality of joining bolts connected to the upper and lower bolt holes. It is something to do.

At least four bolt holes may be formed at positions symmetrical with respect to the strong axis and the weak axis of the H-shaped steel pile cross section (see FIGS. 1 and 2), and the cross section of the H-shaped steel pile may be formed. If it is large, more bolt holes may be formed (see Fig. 4 (a)).

At least two reinforcing ribs may be formed at symmetrical positions on the upper and lower sides (see Fig. 1), and more reinforcing ribs may be attached, especially when the cross section of the H-shaped steel pile is large. (See Figure 4 (b)). Further, the upper and lower reinforcing ribs may be attached symmetrically to both side surfaces of the web of the upper and lower H-shaped steel piles (see FIGS. 1 and 4).

Further, when the upper and lower H-shaped steel piles joined in the pile hole filled with the solidifying material liquid such as cement milk are built, the resistance of the solidifying material liquid in the pile hole is applied to the joint portion of the upper and lower H-shaped steel piles. If the solidifying material liquid resistance reducing part is provided to reduce the resistance, the upper and lower end plates are less likely to receive the resistance of the solidifying material liquid in the pile hole, and the joined upper and lower H-shaped steel piles can be smoothly built in the pile hole. Can be done.

For example, a solidifying material liquid resistance reducing member having an inclined portion that allows the solidifying material liquid to move upward in the pile hole may be attached to the lower side of the lower end plate of the lower H-shaped steel pile ( See Figures 5 and 6).

Further, if the solidifying material liquid resistance reducing member is attached to both the lower side of the lower end plate of the lower H-shaped steel pile and the upper side of the upper end plate of the upper H-shaped steel pile, the pile filled with the solidifying material liquid is used. The upper and lower H-shaped steel piles can be smoothly raised and lowered in the holes while avoiding the resistance of the solidifying material liquid (see FIG. 7).

Further, the joint portion of the joined upper / lower H-shaped steel piles may be formed with an opening that allows the solidifying material liquid in the pile hole to move downward above the pile hole (see FIG. 8).

According to the present invention, end plates are attached to the facing end faces of the upper and lower H-shaped steel piles to be joined, and the end plates are abutted against each other in a surface touch state, and the strong axis and weakness of the cross section of the H-shaped steel piles are abutted. By bolting the positions symmetrical to the shaft with a plurality of joining bolts, the upper and lower H-shaped steel piles can be joined very easily and firmly with as few joining bolts as possible.

An embodiment of the present invention is illustrated, and is an end perspective view showing a state before joining of upper and lower H-shaped steel piles. It is an end perspective view of the lower H-shaped steel pile. FIG. 3 is an end perspective view showing a state after joining the upper and lower H-shaped steel piles of the embodiment shown in FIG. 1. 4 (a) and 4 (b) are cross-sectional views of the joint portion of the upper and lower H-shaped steel piles showing an example of arrangement of the joining bolts. Another embodiment of the present invention is shown, and is an end perspective view showing a state before joining of upper and lower H-shaped steel piles. FIG. 5 shows a state after joining the upper and lower H-shaped steel piles of the embodiment shown in FIG. 5, FIG. 6 (a) is a vertical cross-sectional view of the joint portion, and FIG. 6 (b) is FIG. 6 ( It is a cross-sectional view taken along the line aa in a). Another embodiment of the present invention is shown, and is an end perspective view showing a state before joining of upper and lower H-shaped steel piles. Other embodiments of the present invention are illustrated, FIG. 8 (a) is a front view of an end showing a state after joining of upper and lower H-shaped steel piles, and FIG. 8 (b) is FIG. 8 (a). 8 (c) is a sectional view taken along line aa, and FIG. 8 (c) is a sectional view taken along line bb in FIG. 8 (a).

1 to 4 show an embodiment of the present invention, in which upper and lower H-shaped steel piles 1 and 2 to be joined are arranged on the same vertical line.

Further, the upper and lower end plates 3 and 4 are attached to the opposite end faces of the upper and lower H-shaped steel piles 1 and 2, respectively, and the facing surfaces of the upper and lower end plates 3 and 4 thrust against each other in a surface touch state. It is matched.

Further, a plurality of bolt holes 5 and 6 are formed in the upper and lower end plates 3 and 4, respectively, in communication with each other in the vertical direction. The bolt holes 5 and 6 are formed at positions symmetric with respect to the strong axis XX and the weak axis YY in the cross section of the upper and lower H-shaped steel piles 1 and 2 in the direction perpendicular to the axis, and are usually formed by four upper and lower holes. In particular, when the cross sections of the upper and lower H-shaped steel piles 1 and 2 are large, six or more upper and lower H-shaped steel piles 1 and 2 may be formed (see FIG. 4 (b)).

Further, the upper reinforcing rib 7 is attached to the upper side surface of the upper end plate 3, and the lower reinforcing rib 8 is attached to the lower side surface of the lower end plate 4.

The upper reinforcing ribs 7 are symmetrically attached to both side surfaces of the web 1a of the upper H-shaped steel pile 1, and the lower reinforcing ribs 8 are symmetrically attached to both side surfaces of the web 2a of the lower H-shaped steel pile 2.

In addition, the upper and lower reinforcing ribs 7 and 8 are attached at symmetrical positions on both the upper and lower side surfaces of the upper and lower end plates 3 and 4, and are usually attached by two upper and lower ones, and in particular, the upper and lower H-shaped steel piles 1 and 2. If the cross section is large, three or more upper and lower ones may be attached (see Fig. 4 (b)).

Then, the joining bolts 9 communicate with each other and are tightened in the bolt holes 5 and 6 of the upper and lower end plates 3 and 4. With the above configuration, the upper and lower H-shaped steel piles 1 and 2 are integrally joined on the same vertical line.

In this way, the upper and lower H-shaped steel piles 1 and 2 are bolted at positions symmetric with respect to the strong axis XX and the weak axis Y-Y in the cross section of the H-shaped steel piles 1 and 2 in the direction perpendicular to the axis. It can exert high bending resistance against bending force in both directions around the strong axis X-X axis and the weak axis Y-Y axis.

5 and 6 show other embodiments of the present invention, in which the joined upper and lower H-shaped steel piles 1 and 2 are placed in pile holes filled with a solidifying material liquid such as cement milk. The solidifying material liquid resistance reducing member 10 that reduces the resistance of the solidifying material liquid during continuous construction sandwiches the web 2a under the lower end plate 4 of the lower H-shaped steel pile 2 and is symmetrical on both sides thereof. It is attached.

The solidifying material liquid resistance reducing member 10 was inscribed in the left and right flanges 2b and 2b between the left and right flanges 2b and 2b, and gradually inclined downward from the edge portions of the left and right flanges 2b and 2b toward the web 2a. It is installed in a state, and the tip and both edge ends are welded to the web 2a and the left and right flanges 2b and 2b, respectively.

If the solidifying material liquid resistance reducing member 10 is attached in contact with the edge portion of the reinforcing rib 8 as shown in the figure, the solidifying material liquid resistance reducing member 10 can be reinforced against deformation in the out-of-plane direction. ..

In this way, by attaching the solidifying material liquid resistance reducing member 10 to the lower side of the lower end plate 4 of the lower H-shaped steel pile 2, the upper and lower parts of the upper and lower H-shaped steel piles 1 and 2 are joined. Since the end plates 1 and 2 are less susceptible to resistance due to the solidifying material liquid, the joined upper and lower H-shaped steel piles 1 and 2 can be smoothly built in the pile holes filled with the solidifying material liquid.

Further, as shown in FIG. 7, if the solidifying material liquid resistance reducing member 10 is attached to the upper side of the upper end plate 3 of the upper H-shaped steel pile 1 as in the lower H-shaped steel pile 2, it is joined. The upper and lower H-shaped steel piles 1 and 2 can be smoothly raised and lowered in the pile holes filled with the solidifying material liquid.

That is, the solidifying material liquid resistance reducing member 10 is inscribed in the left and right flanges 1b and 1b between the left and right flanges 1b and 1b, and gradually rises from the edge portions of the left and right flanges 1b and 1b toward the web 1a. It suffices if it is installed in an inclined state. Further, if the solidifying material liquid resistance reducing member 10 is attached in a state of being in contact with the edge portion of the reinforcing rib 7, the solidifying material liquid resistance reducing member 10 can be reinforced against deformation in the out-of-plane direction.

8 (a) to 8 (c) also illustrate other embodiments of the present invention, in which the upper / lower end plates 3 and 4 and the upper and lower reinforcing ribs 7 and 8 are upper / lower H-shaped. The steel piles 1 and 2 are mounted symmetrically on both sides of the strong shaft X-X, and the shafts of the upper and lower H-shaped steel piles 1 and 2 are installed between the upper end plates 3 and 3 and between the lower end plates 4 and 4. An opening 11 is formed which is a flow path in the vertical direction of the solidifying material liquid which is continuous in the direction (vertical direction).

By forming the opening 11 in the joint portion of the upper / lower H-shaped steel piles 1 and 2 joined in this way, the joined upper / lower H-shaped steel piles 1 and 2 are placed in the pile hole. When building, the upper and lower end plates 3 and 4 of the upper and lower H-shaped steel pile joints are less susceptible to the resistance of the solidifying material liquid in the pile holes, so the joined upper and lower H-shaped steel piles 1 and 2 are used. It can be smoothly built in the pile hole filled with the solidifying material liquid.

INDUSTRIAL APPLICABILITY According to the present invention, upper and lower H-shaped steel piles, which are mainly constructed as gantry piles for work gantry, can be easily and strongly joined to each other with as few joining bolts as possible.

1 Upper H-shaped steel pile
1a Web 2 Lower H-shaped steel pile
2a Web 3 Upper end plate 4 Lower end plate 5 Upper bolt hole 6 Lower bolt hole 7 Upper reinforcing rib 8 Lower reinforcing rib 9 Joint bolt
10 Solidifying material Liquid resistance reducing member
11 opening

Claims (4)

It is a joint structure of H-shaped steel piles that join upper and lower H-shaped steel piles arranged on the same vertical line, and is attached to the opposite joint end faces of the upper and lower H-shaped steel piles, and the H-shaped steel piles are connected to each other. Upper and lower end plates formed by communicating multiple upper and lower bolt holes at positions symmetrical with respect to the strong and weak axes in the cross section of the shaped steel pile in the direction perpendicular to the axis, and the upper side surface of the upper end plate. A plurality of upper and lower reinforcing ribs attached to symmetrical positions on the lower side surface of the lower end plate, a plurality of joining bolts connected to the upper and lower bolt holes, and the lower end plate. A solidifying material that is symmetrically attached to both sides of the web of the lower H-shaped steel pile on the lower side to reduce the resistance of the solidifying material liquid when the H-shaped steel pile is built into the solidifying material liquid. A liquid resistance reducing member is provided, and the solidifying material liquid resistance reducing member is inscribed inside the left and right flanges of the lower H-shaped steel pile, and is attached so as to be gradually inclined from the edge end side of the left and right flanges to the web side. H-shaped steel pile joint structure characterized by being In the joint structure of the H-shaped steel pile according to claim 1, the upper and lower bolt holes communicate with each other at at least four places symmetric with respect to the strong axis and the weak axis in the cross section of the H-shaped steel pile in the direction perpendicular to the axis. A joint structure of an H-shaped steel pile formed and characterized in that joint bolts are communicated and fastened to the upper and lower bolt holes. In the joint structure of the H-shaped steel pile according to claim 1 or 2, the upper and lower reinforcing ribs are attached to symmetrical positions on both side surfaces of the web of the upper and lower H-shaped steel piles, respectively. H-shaped steel pile joint structure. In the joint structure of the H-shaped steel pile according to any one of claims 1 to 3, the joint portion of the upper and lower H-shaped steel piles is provided with an opening that allows the movement of the solidifying material liquid. Characterized H-shaped steel pile joint structure.

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