JPH01226916A - Preparation device for gravel pile - Google Patents

Abstract

PURPOSE:To shorten the preparation time per one gravel pile by interposing a relay tank capable of housing gravel in capacity corresponding to at least one casing between a hopper for supplying gravel and a casing. CONSTITUTION:A rotating casing 3 is continuously connected downward to the lower section of a hopper 9 for supplying gravel, and a relay tank 10 capable of housing gravel in capacity corresponding to at least one casing 8 is interposed between the hopper 9 and a fixing casing 8. A compressed-air supply means 12 supplying the inside of the relay tank 10 with compressed air is installed to the upper section of the relay tank 10. The rotating casing 3 is inserted into a ground W, the inside of the casing is filled with gravel G, and the casing 3 is drawn out while gravel G is pushed by compressed air from an upper section, thus preparing a gravel pile P into the ground.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention involves inserting into the ground a casing that is connected downwardly to a hopper for supplying gravel, and collecting gravel such as sand and gravel from the hopper into the casing. It relates to a device for charging and filling gravel, and pulling out the casing while pressing the filled gravel with pressurized air supplied from above (thereby creating gravel piles (columnar bodies of sand, gravel, etc.) in the ground.

(Prior art) This type of conventional gravel pile construction device connects the upper end of the casing directly to a chute provided at the bottom of the gravel input water bar. The gravel is driven into the casing by a shaker or by rotating it using a casing with a screw, and after the casing reaches a predetermined depth, the required amount of gravel is filled into the casing from a hopper. After this filling, pressurized air is supplied to the upper part of the casing to press the gravel inside the casing and pull out the casing, thereby creating a gravel pile for one casing in the ground.

(Problems to be Solved by the Invention) In the conventional equipment as described above, each time one gravel pile is constructed, the casing is filled with gravel equivalent to one casing from the hombar. Since other work will be interrupted while the gravel pile is being filled, the time required to build each gravel pile will be considerably longer if a large number of gravel piles are built in succession at adjacent locations. Construction efficiency was poor.

In view of the above, the present invention aims to reduce the amount of time required to create gravel piles/gravel piles by supplying -2 degree gravel continuously (without interrupting the work of two gravel piles). The purpose of the present invention is to provide a gravel pile construction device that can perform the following tasks.

(Means for resolving division problems) In order to achieve the above object, in the present invention, a relay tank is provided between the gravel supply hopper and the casing, which can accommodate at least the capacity of gravel per casing. A pressure air supply means for supplying pressurized air into the relay tank is provided in the upper part of the relay tank.

(Example) Examples will be described with reference to the drawings.

Figure 1 shows the gravel pile construction equipment surface, and in this figure, 1 is a machine frame that is suspended from a leader (not shown) installed upright, such as a crawler crane, so that it can be raised and lowered, and the lower part of this machine frame 1 is is equipped with a rotating casing 3 that is rotatably hanging down and has a screw 2 screwed on its outer peripheral surface, and this rotating casing 3
is a gear 5, which is fixed to the output shaft of the drive motor 4.4.
5 meshes with a gear 6 fixed to the upper end of the rotating casing 3 and rotates the gear 6, thereby driving the rotating casing 3. A shoe (bottom M) 7 is provided at the lower end of the rotating casing 3. It is attached so that it can be opened and closed freely. A fixed casing 8 is fitted into the rotating casing 3, and a required upper end portion of the fixed casing 8 is fixed to the machine frame 1. Reference numeral 9 denotes a gravel supply hopper, and a shoe Ha is protruded from the lower part of the hopper at a position directly above the fixed casing 8.

A large-diameter cylindrical relay tank IO is interposed between the chute 9a of the gravel supply hopper 9 and the fixed casing 8, and is capable of accommodating enough gravel for each fixed casing 8. In addition, inside the chute 9a,
An on-off valve 11 that opens and closes the inlet opening of the chute 9a is provided, and is also a means for supplying pressurized air into the relay tank 10, and at the same time, an air supply that pushes the on-off valve 11 to close it using the injected air pressure. A supply nozzle 12 is provided. On the other hand, the on-off valve 11 is normally closed by the chute 9a due to its own weight.
is held in a position that fully opens the inlet opening.

A hollow support rod 13 is inserted to hang down from the inside of the relay tank 10 to the inside of the fixed casing 8, and this support rod 1
The lower end of 3 is equipped with a vibrofront 14, and the upper end is connected to a piston loft 15a of a fluid pressure cylinder 15, for example, a hydraulic cylinder, and this fluid pressure cylinder 15 is attached to the upper end of the relay tank 1o. The mounting is fixed to the bracket 16.

The bracket 16 is structured so that gravel from the shoe 9a side can freely flow and fall to the relay tank 10 side. Further, the upper end side of the fluid pressure cylinder 15 and the support rod 13 connected thereto is protected by a protection tube 17 suspended by the bracket 16.

As shown in FIG. 2, the vibroplot 14 has an electric motor 19 disposed within a cylindrical front body 18 having a diameter sufficiently larger than that of the support rod 13, and an eccentric shaft body 20 connected to the output shaft of the electric motor 19. The front main body 18 is designed to vibrate in the lateral direction due to the eccentric rotation of the eccentric shaft body 20 caused by the rotation of the electric motor 19. The camping tire 21 for the electric motor 19 is the support rod 1
The support rod 13 passes through the hollow part of the support rod 13 and is inserted into the protection tube 17 at the upper end thereof, and is appropriately extended to the outside from there. When constructing a gravel pile, this vibrofront 14 protrudes downward from the lower end of the fixed casing 8 as shown by the imaginary line in FIG. Vibration compacts the gravel extruded from the gravel. Furthermore, when the fixed casing 8 is pulled up to the ground together with the rotating casing 3, by contracting the hydraulic cylinder 15, the pipe front 14 is moved to the position shown by the solid line in FIG. Of the gravel filled in the fixed casing 8,
This prevents leakage from the lower end of the casing 8.

Next, use the device configured as described above to measure the soft ground W.
Figures 1 and 3 A- show the process of creating gravel piles inside the
Explain according to E.

At the start of the gravel pile construction work, the on-off valve 11 is open and the vibrofront 14 is retracted into the fixed casing 8, as shown in FIG. The gravel is introduced from the gravel supply hopper 9 and filled into the fixed casing 8 and the relay tank 10. The level of gravel G in the relay tank 10 at this time is indicated by Li in the figure, and the capacity of gravel G between Ll and L2 below it (Fig. 1) is the gravel resistance created in the ground W. The amount shall be equivalent to one book.

From this state filled with gravel G, the rotating casing 3 is rotated and penetrates into the ground IW as shown in FIG. 3B. At this time, the shoe 7 is closed as shown in the zero-rotating casing 3. When it reaches a predetermined depth, its rotation is stopped and the supply of pressurized air is started from the air supply nozzle 12. At this time, the on-off valve 11 is operated to the closed position by the air pressure jetted from the nozzle 12. This increases the air pressure in the upper space within the relay tank 10. While pressurizing the gravel G in the relay tank 10 with the increased air pressure, the rotating casing 6 is moved as shown in FIG. 3C.
is rotated in the opposite direction to start lifting, and at the same time, the hydraulic cylinder 15 is extended to cause the vibrofront 14 to protrude downward from the lower end of the fixed casing, and at the same time, the vibrofront 14 is vibrated again. In this way, as the rotating casing 6 is pulled up, the fixed casing 3
Pressurized gravel G is extruded from the lower end of the ground W, and a gravel pile P is created in the ground W. In this case, the extruded gravel G is subjected to the vibration action of the vibrofront 14, so it becomes a consolidated strong gravel. A pile P will be formed. Further, as is clear from FIG. 3C, as the gravel G is discharged from the fixed casing 3 into the ground W, the level of the gravel G in the relay tank 1o decreases. By raising the rotating casing 6 above the ground as shown in the third diagram, the gravel pile P has an amount equivalent to the capacity of the fixed casing 3, that is, the capacity between levels LIILO in the relay tank 10. will be created.

When the rotating casing 6 is lifted up to the ground, the supply of pressurized air is stopped and the vibrofluorocarbon eye 4 is drawn into the lower end of the fixed casing 3 as shown. By drawing this vibrofront 14 into the fixed casing 3, the opening area at the lower end of the fixed casing 3 is narrowed, and the gravel G from the lower end of the fixed casing 3 is narrowed.
leakage can be actively prevented.

After completing the creation of the first gravel pile P in this way, the device is moved to another location, where the above series of operations are performed again to create the second gravel pile.
During the land reclamation work at this other location, as shown in Figure 3, the fixed casing 3 is still filled with gravel equivalent to one gravel pile, so the reclamation work can be connected without particularly supplying gravel. It can be done by Therefore, the supply of gravel may be carried out appropriately before the construction of the third gravel shaft.

In this example, a relay tank was used that could accommodate 5 to 6 fixed casings of gravel, but if a relay tank that can accommodate 5 to 6 casings of gravel is provided, 5 to 6 gravel can be stored without replenishing gravel. The piles can be constructed in succession and effectively.

In addition, in the embodiment, a casing with a screager was used and the rotating casing was rotated and inserted into the ground together with a fixed casing, but by using an exciter instead of such a double casing, a single casing can be inserted into the ground. The casing (fixed casing) may be driven while being moved vertically, and the present invention can be applied in either case.

(Effects of the Invention) According to the present invention, a relay tank capable of accommodating at least the capacity of gravel for one casing/bottle is interposed between the gravel supply water collar and the casing tank. It is no longer necessary to supply and fill gravel every time a gravel pile/book is created, and when supplying gravel at least two times, it is possible to continuously supply at least two gravel piles without interrupting the work. This has the effect of shortening the time required to create gravel/hits.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a gravel pile building device showing an embodiment of the present invention, Fig. 2 is an enlarged longitudinal cross-sectional view of a vibrofront, and Figs. 3 A-E illustrate the construction process of gravel pile building by the device of the present invention. FIG. DESCRIPTION OF SYMBOLS 1... Machine frame, 3... Rotating casing, 7... Shoe, 8... Fixed casing, 9... Water collar for gravel supply, 10... Relay tank, 11... Open/close valve ,
12...Air supply nozzle (pressure air supply means). 21 Ugite sequel? IN Official document (spontaneous) May 24, 1988 Patent Application No. 52216 2, Title of invention Gravel pile building device 5, Subject of amendment ``Detailed description of the invention'' and ``Drawings'' As shown in the attached sheet (1), the words "rotating casing 6" are replaced with "rotating casing 6" in lines 9 to 10 and lines 14 on page 8 of the specification, respectively.
"Rotating casing 3" is corrected. (2) In line 15 of the same page of the same book, ``fixed casing 3J is corrected to r fixed casing 8J.'' (3), page 9 of the same book, lines 1, 5, 10, 1
Lines 2 to 14 and lines 20 to 1 of page 10 contain “
``Fixed casing 3'' has been corrected to ``R Fixed casing 8''. -), on page 9, lines 4 and 8 of the same book, the words "rotating casing 6" are corrected to read "single-turning casing 3j". (5) Insert the following sentence between lines 15 and 16 on page 9 of the same book. "In addition, the level measurement of gravel G in the relay tank 1O is performed by a weight 2 measurement device in which a weight detects the gravel surface. In this level measurement, gravel G is substantially separated from the rotating casing 3. Since the fixed casing 8 and the relay tank 1O are loaded into the fixed casing 8 and the relay tank lO, the ζ gravel does not co-advance due to the rotation of the rotating casing 3, and therefore there is no hindrance (measurable) during the rotation of the rotating casing 3. Yes, it is possible.j (6), on page 10, lines 6 to 18 of the same book, correct the sentence in front of ``In this example, it is possible to apply...'' as follows: ``No. 4 The figure shows another embodiment, which is a single-pipe gravel pile construction device that uses only a rotating casing with a screw and omits a fixed casing. The section 22 is fitted into the upper end of the rotating casing 3.Even in the case of such a single pipe system using the rotating casing 3, since the edges of the relay tank 10 and the rotating casing 3 are cut off from each other, the rotating casing Even during the rotation of step 3, the level of gravel can be measured using the measuring device inside the relay tank IO without any problem.Also, as a single pipe system, in addition to the one consisting only of a rotating casing with a screw, There is a gravel pile construction device that consists only of a fixed casing, and this device drives the fixed casing into the ground while applying vertical vibration to the fixed casing using a vibration exciter. The present invention can also be applied to a device consisting of only a single casing.In addition, in the embodiments shown in Figs. However, if a relay tank capable of accommodating 5 to 6 gravel casings is provided, 5 to 6 gravel piles can be effectively constructed in succession without replenishing gravel.J (7) "This is an explanatory diagram" on page 11, line 14 of the same book.
4 is a vertical sectional view showing another embodiment of the present invention. Correct it with J. (8) Add Figure 4 of one drawing as per the attached sheet. Above is Figure 4

Claims (1)

[Claims] A casing connected to the bottom of the gravel supply hopper is inserted into the ground, and the casing is filled with gravel such as sand and gravel from the hopper, and the filled gravel is pressed with pressurized air from above. In a gravel pile construction device that creates a gravel pile in the ground by pulling out a casing while doing so, a relay tank capable of accommodating gravel with a capacity of at least one casing is interposed between the hopper and the casing, A gravel pile building apparatus characterized in that a pressure air supply means for supplying pressurized air into the relay tank is provided in the upper part of the relay tank.