JPH0645475Y2 - Steel pile foundation - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pile foundation useful when constructing a support pole for a sign or a street light near a curb in an urban area.

[0002]

2. Description of the Related Art Conventionally, in order to build a support pole for a sign or a street light, a method of digging deep into the ground and driving fresh concrete to fix the support pole has been adopted. Widely, drilling, formwork assembly,
Since a time-consuming work such as driving and curing of fresh concrete is required, in recent years, a driving type steel pile foundation as shown in FIG. 2 has been used.

In the steel pile foundation 11 of FIG. 2, a surface plate 13 is welded to the top end of the H steel pile 12, and fixing bolts 16a and temporary bolts 16b are provided at four corners on the upper surface side of the surface plate 13 and inside thereof. When the steel pile foundation 11 is erected in the ground 10, a detent 15a protruding from the lower surface of the L-shaped driving attachment 15 is drilled on the surface plate 13 when the steel pile foundation 11 is erected in the grounded state. 13a and the bolt hole 15b formed in the attachment 15 is fixed to the temporary bolt 16 on the surface plate 13.
Insert through b and fasten. Then, the attachment 15 fixed on the surface plate 13 is held by a vibro hammer (not shown) and driven to penetrate into the predetermined ground from the tip of the H steel pile 12, so that the surface plate 13 is placed on the ground surface. When it reaches the position, the penetration is stopped and bolts are fastened to the respective fixing bolts 16a on the surface plate 13 through the holes in the flange 9a fixed to the lower end of the support pole 9, and then the excavation holes in the periphery of the surface plate 13 and the flange 9a are connected to each other. Harden with raw concrete 19.

According to this steel pile foundation 11, the driving process is mainly performed, and the excavation of the ground 10 is performed around the joint between the surface plate 13 and the flange 9a of the support pole 9, so that it is far more than the conventional construction method. The amount of excavated soil is small, there is no need to take up a large construction space, and the labor and time for assembling formwork, driving in ready-mixed concrete, and curing can be saved.

[0005]

However, in an urban area where various buried objects 16 such as gas pipes, water pipes, and various cables are complicated, in order to drive the steel pile foundation 11, these buried objects 16 are used. It is necessary to avoid casting so that it will not be damaged or destroyed, but if there is an embedded object 16 in the ground near the curb 18, there is the inconvenience that the placing work itself at that location cannot be done at all. there were.

The present invention has been made in view of such circumstances, and is a steel pile capable of constructing a pole or a support pole for a street light as a pillar even if there are various buried objects in the ground near the curb. The purpose is to provide the basis.

[0007]

A means for solving the problems of the present invention will be described with reference to FIG. 1 corresponding to an embodiment. The steel pile 2 will be horizontal at the top end thereof from the axis 2a of the steel pile 2. The surface plate 3 is fixed by shifting it in the direction through the reinforcing plate 4, and a fixing bolt 6a for connecting the support pole 9 to the required position is erected on the upper surface side of the surface plate 3 and the surface plate 3 is fixed. A temporary bolt 6b for fastening the driving attachment 5 is erected on the upper surface side substantially coaxially with the steel pile 2, and the attachment 5 has a projection 5a provided on the bottom thereof in the hole 3a of the surface plate 3. It is characterized in that it can be connected to the surface plate 3 in a locked state.

[0008]

In the above structure, the surface plate 3 is attached to the axis 2a of the steel pile 2.
Since the surface plate 3 is fixed to the top end of the steel pile 2 via the reinforcing plate 4 with a required gap, the support pole 9 fixed to the upper surface of the surface plate 3 via the fixing bolts 6a is the steel pile 2 Since it is built on a soil surface different from the placement position of the
Even if there is a buried object in the soil immediately below, the steel pile 2 can be driven while avoiding this buried object.

When the steel pile 2 is driven by a vibro hammer to be buried in the soil, the driving attachment 5 held by the vibro hammer is provided on the surface plate 3 substantially coaxially with the steel pile 2. Since it is attached to the temporary bolt 6b, the vibro hammer will drive the shaft center of the steel pile 2, and the driving efficiency is kept good even if the surface plate 3 is displaced from the axis of the steel pile 2. Be done.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 (a) is a partial perspective view showing the periphery of a surface plate portion of the present invention, FIG. 1 (b) is a perspective view of a driving attachment used for a steel pile foundation of the present invention, and FIG. 1 (c) is a steel pile. A side view and a bottom view of the foundation, and Fig. 1 (d) are side views of the construction state in which a support pole is connected to the steel pile foundation. In these drawings, the same parts as those in FIG. 5 are designated by the same reference numerals.

As shown in FIG. 1 (a), the steel pile foundation 1 of this embodiment is located at a position displaced from the axis 2a of the steel pile 2 at the top end of the steel pile 2 made of H steel having a required length. While the surface plate 3 is welded, the reinforcing plate 4 is welded to the joining corners of the surface plate 3 and the steel pile 2, and the fixing bolts 6a are erected on the upper surface side of the surface plate 3 at the four corners. A temporary bolt 6b is erected substantially coaxially with the steel pile 2 on the upper surface side of the mounting attachment 5 shown in FIG. 1 (b). The bolt holes 5b are inserted into the temporary bolts 6b of the surface plate 3 while being locked in the perforations 3a of FIG. Therefore, the driving attachment 5 inserted into the temporary bolt 6b of the surface plate 3 and the axis 2a of the steel pile 2 substantially coincide with each other.

In order to drive the steel pile foundation 1 having such a structure near the paving stones 18 along the road, as shown in FIG. 1 (d), after exploring the buried pipe 16 in the soil, this buried Tube 16
Excavate the soil surface at a position avoiding, and drive the attachment 5 fixed to the surface plate 3 of the steel pile 2 by gripping it with a vibro hammer (not shown). At this time, since the projection 5a of the driving attachment 5 is locked in the hole 3a of the surface plate 3, the driving attachment 5 does not come off due to the vibration of the vibro hammer. Then, when the surface plate 3 penetrates to a position slightly lower than the ground surface, the driving is stopped, the vibro hammer is removed, the driving attachment 5 is detached from the temporary bolt 6b on the surface plate 3, and the temporary bolt 6b is further cut. Remove. Next, the bolt holes formed in the flange 9a of the support pole 9 are passed through the fixing bolts 6a on the surface plate 3 and fastened with nuts. Finish the building pillar.

Thus, the curb 1 as shown in FIG. 1 (d)
When the support pole 9 is to be erected at a position where the gutter 8 and the buried object 16 are close to each other, in the case of the conventional steel pile foundation, when the support pole 9 is to be built right above the steel pile 2, the curb 18 is hit. It is impossible to build a pillar, but the steel pile foundation 1 of this embodiment
In that case, after the steel pile 2 is driven while avoiding the buried pipe 16, the support pole 9 standing next on the steel pile 2 can be connected while avoiding the curb 18, so that Even at a place where the curb 18 and the buried pipe 16 are considerably close to each other, the steel pile 2 can be driven and the support pole 9 can be constructed. Moreover, in the present embodiment, the surface plate 3 is provided at a position deviated from the axis of the steel pile 2, but the temporary bolt 6b for fastening the attachment 5 for driving is provided with the axis 2a of the steel pile 2.
Since the steel pile 2 is provided at a position substantially corresponding to, the steel pile 2 can be efficiently driven.

[0015]

As described above, according to the steel pile foundation of the present invention, since the support poles can be connected to the steel pile at a position deviated from the axial center of the steel pile, it can be used in an urban area complicated with buried objects. Even near the curb, if the support pole does not hit the curb, it is possible to drive steel piles avoiding buried objects, and signs and street lights can be installed in places where it was not possible to implement in the past. It will be possible.

Further, according to the present invention, since the driving attachment is mounted at a position substantially coincident with the axis of the steel pile and can be driven efficiently by using the vibro hammer, the amount of excavated soil can be small, and It is possible to satisfy all the above-mentioned advantages of the conventional cast-in-type steel pile foundation such that it does not require a large construction space, and that it can save the labor and time for assembling the formwork, driving in the ready-mixed concrete, and curing.

[Brief description of drawings]

FIG. 1 is a view showing a steel pile foundation of the present invention.
1 (a) is a partial perspective view showing the periphery of the surface plate portion, FIG. 1 (b) is a perspective view of a driving attachment used for a steel pile foundation, and FIG.
(c) is a side view and a bottom view of the steel pile foundation, and Fig. 1 (d) is a side view of the steel pile foundation in a working state showing a support pole connected to the steel pile foundation.

FIG. 2 is a view showing a conventional steel pile foundation.
(a) is a partial perspective view showing the periphery of the surface plate part, and Fig. 2 (b) is a perspective view of a driving attachment used for a steel pile foundation.
(c) is a side view and a bottom view of the steel pile foundation, and FIG. 2 (d) is a side view of the steel pile foundation in a working state showing a support pole connected to the steel pile foundation.

[Explanation of sign]

1 ... Steel pile foundation, 2 ... Steel pile, 2a ... Steel pile axis, 3 ... Surface plate, 3a ... Perforation, 4 ... Reinforcing plate, 5 ... Attachment for attachment, 5a ... Projection for stopping rotation, 5b ... Bolt hole , 6a ...
Fixing bolt, 6b ... Temporary bolt, 9 ... Support pole, 16
… Buried pipes, 18… curbs.

Claims (1)

[Scope of utility model registration request] 1. A platen 3 is fixed to a top end portion of a steel pile 2 by horizontally shifting from an axis 2a of the steel pile 2 through a reinforcing plate 4,
A fixing bolt 6a for connecting the support pole 9 is erected on the upper surface side of the surface plate 3 at a required position, and the surface plate 3 is also fixed.
A temporary bolt 6b for fastening the driving attachment 5 is erected substantially coaxially with the steel pile 2, and the attachment 5 has a projection 5a provided at the bottom thereof for drilling 3a of the surface plate 3. A steel pile foundation characterized in that it can be connected to the surface plate 3 in a state of being locked to.