JPS5914507Y2 - Sand pile creation device - Google Patents

Description

[Detailed description of the invention] This invention is equipped with a hopper for charging sand, etc. at the upper end of a tubular casing, and an appropriate number of vibrators on the circumferential side of the lower end. The present invention relates to an improvement in a sandpile creation device which is provided with a discharge shoe.

That is, the sand pile construction device as described above is used to implement the sand compaction pile construction method developed by the applicant, and is used to deposit the above-mentioned tubular casing into soft ground to a required depth for the purpose of strengthening it. After penetrating, the sand, gravel, or other aggregates put into the casing, or these and water, are supplied into the ground while the casing is pulled up, and at the same time, the supplied sand, etc. is vibrated by a vibrator. This sand compaction pile construction method is used to compact the supplied sand, etc., and create compacted sand piles for ground reinforcement. It has the advantages of being able to shorten the construction period by a large amount because the sand piles are supplied and consolidated and compaction is performed, and because the sand pile diameter is constant due to the consolidation compaction using vibration, it is possible to achieve uniform ground reinforcement. However, this idea is not only distantly related to the strong compaction of packed sand, but also
The sand pile diameter can be easily changed according to the condition of the ground to be strengthened and the intended degree of ground reinforcement, and the sand pile can always be firmly compacted regardless of the sand pile diameter. It is an object of the present invention to provide a novel sandpile creation device of the above type.

Regarding the illustrated embodiment, the configuration of the sandpile creation apparatus according to the invention will be explained. In the figure, 1 is a tubular casing made of a steel pipe, and the upper end of the casing 1 has a hopper 2 for charging sand, etc. , and a suitable number of vibrators 5 covered with a cover 3 and driven by a drive motor 4 on the circumferential side of the lower end, that is, each vibrator 5 is provided with an eccentric body 5a, and a tuning gear 5b is provided between each vibrator. idle gear 6
A vibrator 5 is provided at the lower end of the casing 1, as shown by the solid line in FIG. An appropriate number of shoes 7 for discharging sand, etc. are provided, which are supported by the casing 1 so as to be rotatable between the positions shown by chain lines in the figure, and the above-mentioned input hopper 2.
An air valve 8 is formed at the upper end of the casing 1 below the air valve 8, and an air valve 9 that can freely close the inside of the casing 1 is provided above the air valve 8, and a vibro hammer 10 is equipped at the top of the casing 1. However, the illustrated sandpile creation apparatus has the following improvements in accordance with this invention.

That is, as shown in FIGS. 1 and 4, a connecting hardware 11 having upper and lower flange portions 11 a and 11 b is attached to the lower end of the casing 1, and the upper flange portion 11 a is attached to the cover by an appropriate means such as welding. 3, the vibrating body 12 is radially provided with an appropriate number of vibrating blades 12a facing between the shoes 7 as shown in the figure, and each vibrating blade 12a is attached to the vibrating body 12. By fixing the ring-shaped flange portion 12b at the upper end along the lower flange portion 11b of the connecting hardware 11 with an appropriate number of bolts 13 and nuts 14, the ring-shaped flange portion 12b is removably attached to the lower end of the casing 1. It is set up.

By attaching the vibrating body 12 to the lower end of the casing 1 as described above, the vibrating body 12 can be replaced freely, and when a sand pile with a larger diameter is to be constructed, the first −5 and 6 in place of the small-sized vibrating body 12 in Figure 4.
The large-sized vibrating body 12 shown in the figure is attached to the lower end of the casing 1,
While using the same casing 1, a sand pile with a required larger diameter is constructed.

Furthermore, another vibrator 15 is attached to the vibrating blades 12a of the vibrating body 12, as shown by chain lines in FIGS. 5 and 6, to ensure sufficient compaction of the filling sand forming the large-diameter sand pile. In some cases, this may be done.

As mentioned above, the sandpile creation device according to this invention is provided with a plurality of vibrating bodies 12 having different diameters, and the vibration of any one of the plurality of vibrating bodies is The sandpile creating device is configured such that the body 12 can be selectively fixedly connected to the lower end of the casing 1.

The sandpile creation device according to this invention has different diameters of the vibrating bodies 12 as described above.
By selectively using the vibrating body 12, it is possible to construct sand piles with different diameters using a single casing 1, and for this reason,
The diameters of the other vibrating bodies 12 except for the vibrating body 12 with the smallest diameter are larger than the outer diameter of the cover 3 that covers the outer peripheral side of the vibrator 5, as in the vibrating body 12 illustrated in FIGS. is set to

In other words, if a vibrating body with a diameter smaller than the outer diameter of the cover 3 is installed at the lower end of the casing 1, the diameter of the sand pile to be created will be determined by the outer diameter of the cover 3. If the vibrating body 12 with a larger diameter than the casing 1 is used in series with the lower end of the casing 1, it will determine the diameter of the sand pile to be created, and such a vibrating body 12 can be used interchangeably. Therefore, the diameter of the sand piles to be constructed will be changed.

The vibrating body 12 with the smallest diameter corresponds to the sand pile with the smallest diameter that can be created by the device of the present invention. The diameter of the minimum diameter vibrating body 12 may be made larger than the outer diameter of the cover 3 and determined by the minimum diameter vibrating body 12. .

The vibrating body 12 shown in FIG. 1.3.4 has a diameter approximately equal to the outer diameter of the cover 3, as the minimum diameter vibrating body as described above.

As shown in Fig. 7, this sandpile creation device suspends the casing 1 onto the seabed ground using a crane ship or above the land ground using a crane truck, positions it at a predetermined position, and lowers it. a) Drive the casing 1 to a predetermined depth by operating the push winch, and in some cases also operating the vibro hammer 10, with the shoe 7 in the closed position due to penetration resistance from the ground (Fig. 7). b
), then aggregates such as sand S, gravel, ore slag, or water are charged into the casing 1 from the hopper 2 (Fig. 7C), and then the vibrator 5 on the circumferential side of the lower end of the casing 1 is activated. The casing 1 is gradually lifted up by a lifting winch while the vibrohammer 10 on the top of the casing 1 is operated as the case may be. With the air valve 9 closed, compressed air is appropriately fed into the casing 1 from the air valve 8 to control the amount of sand S discharged, and at the same time, it is transmitted to the vibrating blades 12a of the vibrating body 12. The packed sand S is compacted by the vibrations caused to form consolidated sand piles SP (Fig. 7 d), and the casing 1 is pulled up from the ground and the driving of the sand pile SP is completed (Fig. 7 d). Figure e) After that, the casing 1 is moved to the next predetermined driving position using a crane ship or a crane truck, and the above steps are repeated one after another. They are used to strengthen soft ground by placing a large number of them in a square arrangement with a 2m pitch.

When constructing a sand pile as described above, a vibrating body 12 having an appropriate diameter is selected according to the intended diameter of the sand pile, and is used by being connected to the lower end of the casing 1.

In the above embodiment, the shoe 7 was directly supported by the casing 1, but as shown in FIG.
2 may be provided with a shoe 7 for support.

Since the sandpile creation device according to this invention is configured as described above, it particularly has the following advantages.

In other words, the sandpile creation device of this invention includes, in addition to the vibrating machine on the circumferential side of the lower end of the casing, a vibrating body that is connected and fixed to the lower end of the casing and is equipped with an appropriate number of vibrating blades radially. Because the sand pile is constructed, the filling sand, etc. is compacted by the vibrating blades, which are immersed in the sand, etc., filled in the ground under the casing, resulting in strong compaction. What is achieved is, of course, that a plurality of vibrating bodies with different diameters can be selectively fixed and connected to the lower end of the casing, so vibrating bodies with different diameters are selected and used. This makes it possible to easily and economically change the sand pile diameter according to the condition of the ground and the intended degree of ground reinforcement without changing the casing itself, which is the main body of the device. In particular, when using a vibrating body with a larger diameter to construct a sand pile with a larger diameter, the compaction effect of the packed sand by the vibrating body is enhanced, and even in the case of a large-diameter sand pile, it can be strengthened. As a result, strong compaction of the filled sand is always achieved regardless of the diameter of the sand pile.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway vertical sectional view of one embodiment of this invention;
3 is a bottom view of the same embodiment, FIG. 4 is a partially cutaway partially vertical perspective view of the main part of the same embodiment, and FIG.
The figure is a vertical sectional view of the main part of the same embodiment when the vibrating body is replaced, Figure 6 is a bottom view in the same case, Figure 7 is a schematic diagram showing the construction order, and Figure 8 is a diagram showing a modified example. FIG. 1... Casing, 2... Input hopper, 5... Vibrator, 7... Shoe, 1
1...Connection hardware, lla, llb...
・Flange part, 12... Vibrating body, 12 a...
... Vibrating blade, 12 b ... Flange part, 1
3...Bolt, 14...Natsuto.

Claims (1)

[Scope of utility model registration request] A sand pile construction method in which a hopper for charging sand, etc. is installed at the upper end of a tubular casing, an appropriate number of vibrators are installed at the circumferential side of the lower end, and a shoe for discharging sand, etc., which can be opened and closed at the lower end of the casing, is installed. A device comprising a plurality of vibrating bodies each having an appropriate number of vibrating blades radially and having different diameters, the diameters of the other vibrating bodies excluding the smallest diameter vibrating body being as described above. A plurality of vibrating bodies are provided, each having a diameter larger than the outer diameter of a cover that covers the outer circumferential side of the vibrating machine, and any one of these vibrating bodies is selectively attached to the casing. A sandpile creation device characterized by being configured so that it can be fixedly connected to the lower end of the sandpile.