JPS6011963Y2 - Connection device between vibrohammer and steel pipe pile - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a coupling device for a vibrohammer and a steel pipe pile.

Conventionally, when driving a steel pipe pile with a vibrohammer, as shown in Figs. 1 and 2, a chucking plate 2 is fixed to the inner peripheral surface of one end of the steel pipe pile 1 by a method such as welding. The portion of the plate 2 protruding from one end of the steel pipe pile 1 was held by a vibrohammer (not shown), and the steel pipe pile 1 was driven into the ground.

However, in such a method, a large chucking plate 2 having a width equal to the inner diameter of the steel pipe pile 1 is required for each steel pipe pile 1, which is very uneconomical, and especially in the case of a large diameter steel pipe pile 1, The chucking plate 2 became large and heavy, making it difficult to attach it to the steel pipe pile 1.

In view of the above points, the present invention provides a coupling device for a vibrohammer and a steel pipe pile, which is easy and economical to attach to a steel pipe pile.One embodiment of the present invention will be described below with reference to the drawings.

3 and 4, 3 is a steel pipe pile, and on the inner peripheral surface of one end of the steel pipe pile 3, a pair of power transmission plates 4° 4 facing each other along the diameter direction are attached by welding or the like. Fixed in a way.

This power transmission plate 4 has a bolt hole 5 at one end of the steel pipe pile 3, and has a bolt hole 5 at the other end of the steel pipe pile 3 that protrudes inward in the radial direction of the steel pipe pile 3. It has a protruding part 6.

In FIGS. 5 to 7, 7 is a plate, and on both sides of the plate 7 there are a pair of guide plates 8 and 9 that are wider than the plate 7.
are each fixed by a method such as welding.

One end 8 of one of the pair of guide plates 8 and 9
a is located above one end 9a of the other guide plate 9, and one end 7a of the plate 7 is located above one end 8a of the one guide plate 8.

The other end 8b of the one guide plate 8 is located below the other end 7b of the plate body 7, and the other end 9b of the other guide plate 9 is the other end 8b of the one guide plate 8. It is located below.

A pair of hanging holes 10 and 1G are bored in a portion of the plate 7 that does not overlap with the one guide plate 8, and one end of the plate 7 is fitted with a vibrohammer (not shown). ).

That is, the mounting portion 11 is held by the vibro hammer.

Further, a pair of bolt holes 12 and 12 are bored at one end of the one guide plate 8 in a portion that does not overlap with the plate body 7 and the other guide plate 9. , is formed in a long hole extending in a direction perpendicular to one end 8a and the other end 8b of the one guide plate 8.

Note that the plate body 7 and the guide plates 8 and 9 constitute a coupling device main body 13.

8 and 9 show a state in which the coupling device main body 13 and the power transmission plates 4, 4 are assembled, and the coupling device main body 13 and the pair of power transmission plates 4, 4 are They are connected by bolts 14, 14 and nuts 15, 15 inserted into bolt holes 5, 5 and 12, 12 of one guide plate 8 and power transmission plates 4, 4.

The other end 7b of the plate body 7 is in contact with the end surface 6at6a of the protruding portions 6, 6 of the power transmission plates 4, 4 on the one end side of the steel pipe pile 3, and the power transmission plate 4.4 is Information board 8.9
is sandwiched between.

The plate body 7 is thicker than the power transmission plates 4, 4,
Therefore, the power transmission plates 4, 4 and the pair of guide plates 8
, 9, a slight gap is formed between them.

In this manner, when the other end 7b of the plate body 7 and the end surfaces 6a, 6a of the protruding portions 6.6 of the power transmission plates 4, 4 on the one end side of the steel pipe pile 3 are in contact with each other, as shown in FIGS. 10 and 11. As shown, the peripheral wall of the bolt hole 12 is not in contact with the bolt 14.

Note that 16 is a washer. Next, the procedure for driving steel pipe piles will be explained.

First, the power transmission plate 4 is fixed to the inner peripheral surface of one end of the steel pipe pile 3.
, 4 with bolts 14 and nuts 15, and then the steel pipe pile 3 is erected at the expected driving position with its one end facing upward.

At this time, as in this embodiment, the suspension hole 10.1 is provided in the plate body 7.
0, insert a hanging device such as a shackle into the hanging holes 10, 10, and use a crane etc. to lift the steel pipe pile 3.
can be set up.

The positional relationship between the bolt hole 5.12 and the bolt 14 when the steel pipe pile 3 is lifted up through the coupling device body 13 in this manner is shown in FIGS. 12 and 13.

Next, the mounting portion 11 of the plate 7 to the vibro hammer is clamped by a vibro hammer (not shown), and the vibro hammer is driven to drive the steel pipe pile 3.

At this time, if the bolt hole 12 is made into a long hole as in this embodiment, the vibration of the vibrohammer will cause the other end 7b of the plate 7 to
The end surfaces 6a, 6a of the protrusions 6,6 of the power transmission plates 4,4 on the one end side of the steel pipe pile 3 repeatedly come into contact with and separate from each other, and a striking force is applied to the steel pipe pile 3.

Note that instead of making the bolt hole 12 a long hole, the bolt hole 5 may be formed as a long hole.

In addition, if both bolt holes 5 and 12 are not formed into long holes,
The vibro hammer and the steel pipe pile 3 vibrate together as in the conventional case.

Further, even if the coupling device main body 13 and the power transmission plates 4, 4 are not necessarily coupled, the plate body 7 is guided along the power transmission plates 4, 4 by the guide plate 8.9, so that the coupling device main body 13
Although there is little possibility that the power transmission plates 4, 4 will fall off, this falling off can be reliably prevented by connecting them with bolts 14 and nuts 15 as in this embodiment.

After the steel pipe pile 3 has penetrated into the ground to a predetermined depth, the bolts 14 and 14 are pulled out and the coupling device main body 13 is removed, thereby completing the work of driving the steel pipe pile 3.

This coupling device main body 13 is reused when driving another steel pipe pile 3.

In this way, the coupling device main body 13 can be reused any number of times, which is extremely economical.

Furthermore, since the power transmission plates 4, 4 are sufficiently smaller than conventional chucking plates, the power transmission plates 4, 4 can be easily attached even in the case of a large diameter steel pipe pile 3.

In the above embodiment, an example was described in which the protrusion 6 was provided on the power transmission plate 4 to form an L-shape as a whole. It may have any shape as long as it can come into contact with the other end 7b.

As explained above, the device for connecting a vibrohammer and a steel pipe pile according to the present invention is extremely economical because the main body of the device can be reused any number of times.

Furthermore, since the power transmission plate is sufficiently smaller than a conventional chucking plate, it can be easily installed even in the case of a large diameter steel pipe pile.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the conventional device, Fig. 2 is a front view of the same, Figs. 3 to 13 show an embodiment of the present invention, and Fig. 3 shows the power transmission plate fixed to the steel pipe pile. 4 is a longitudinal front view of the same, FIG. 5 is a plan view of the main body of the coupling device, FIG. 6 is a front view of the same, FIG. 7 is a side view of the same, and FIG. 8 is a plan view showing the overall configuration. Fig. 9 is a longitudinal sectional front view of the same, Fig. 10 is a longitudinal sectional side view showing the positional relationship between the bolt hole and the bolt when the plate body and the power transmission plate are in contact with each other, and Fig. 11 is the longitudinal sectional view of the same in Fig. 10. A-A
12 is a longitudinal sectional view showing the positional relationship between the bolt hole and the bolt when the steel pipe pile is lifted through the coupling device body, and FIG. 13 is a sectional view taken along line B-B in FIG. 12. FIG. 3... Steel pipe pile, 4... Power transmission plate, 6
a...End face, 7...Plate body, 7a...
...One end of the plate body 7, 7b...The other end of the plate body 7,
8, 9...Guide plate, 11...Mounting part.

Claims (1)

[Scope of utility model registration request] A pair of power transmission plates fixed to the inner circumferential surface of one end of the steel pipe pile along the diameter direction and facing each other, and one end of which has an attachment portion to a vibrohammer, and the other end of the pair of power transmission plates. A vibrohammer and a steel pipe pile that are operated by a plate that can come into contact with the end face of one end of the steel pipe, and a pair of guide plates that are fixed to both sides of the plate and sandwich the pair of power transmission plates. Coupling device.