JPS6052253B2 - sand drain equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sand drain device for improving soft ground.

Conventionally, in order to improve soft ground, a plurality of vertical holes were dug and the vertical holes were filled with sand or the like to improve the ground.

However, this type of structure has the disadvantage that, for example, when the ground shifts, the sand filled in the vertical hole becomes scattered. Therefore, in order to eliminate the above-mentioned drawbacks, the present invention proposes an apparatus that can effectively improve soft ground by covering the sand filled in the vertical hole with bugs.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 16.

Reference numeral 1 denotes a double tube consisting of an inner cylinder 2 and an outer cylinder 3, the inner cylinder 2 being supported by the outer cylinder 3 at appropriate locations, and a gap 4 being provided between them.

The inner cylinder 2 is provided with a plurality of holes 2a, and the holes 2a are used for venting air, water, and the like. A plurality of (four in this embodiment) opening/closing gates 5 are provided at one end of the outer cylinder 3 via a pair of brackets 6, 6 and a shaft 7, respectively. Each opening/closing gate 5 is connected to the double pipe 1 through a tensile member 8 inserted into the gap 4 of the double pipe 1.
It can be opened and closed outward by a cylinder device 9 supported at a predetermined position within the gap 4. Further, near the other end of the double tube 1, an opening 2b is provided into which the bag 10 can be inserted. As shown in FIG. 12, the bag 10 is elongated and shaped like a bag with one end open, and the other end is tapered so that it can be filled with sand. Reference numeral 11 denotes a chute for guiding the bug 10 to the opening 2b, which is provided separately from the double pipe 1.

12 is a holder for holding the double pipe 1 at a predetermined location;
It is attached to a stand 14 provided on a workbench 13.

The holder 12, as shown in FIGS. 6 and 7,
It is composed of a pair of claws 15, 15 that can be engaged with the recess 1a formed in the double tube 1 from both sides thereof, and a cylinder device 16 that allows the winter melon 15 to approach and separate from the double tube 1. There is. Reference numerals 17 and 17 denote a pair of bug hanging bodies that are connected via a chain 18 above the chute 11 and are movable up and down. Each bug hanging body 17 holds the open end of the bug 10 with a stop band 19. At the same time, the main body is made hollow so that the inside of the bag 10 can be filled with sand or the like.

20, 20 are a pair of chain wheels that engage with the chain 18 to raise and lower the bag hanging body 17, and as shown in FIG.
It is operatively connected to a rotational drive device 23 via 22.

24 is an adjustment tool for the chain 18. The stop band 19 is
As shown in FIGS. 10 and 11, it is supported by the bug hanging body 17 via a pin, and the recess 17 of the bug hanging body 17
At (a), the open end of the bag 10 is clamped by a spring 25 or a manually operated screw body. A plurality of elastic bodies 26 are provided inside the stopper band 19 to prevent damage to the bag 10 during clamping.

27 is a sand charging device which is movable on a rail 28 by a cylinder device 29, and includes a hopper 30 and a charging chute 3.
It is composed of 1.

That is, the sand charging device 27 is clamped to the bag hanging body 17 and the bag 10 is placed in the inner cylinder 2 of the double pipe 1.
Sand is filled into the chamber through the input chute 31. A steel pipe 32 connects the double pipe 1 and a pile driver 33 having a vibrator, and is designed to be easily connected to the double pipe 1.

That is, as shown in FIGS. 13 to 16, a flange 34 having a notch 34a is provided at the end of the steel pipe 32,
Further, a collar 35 that can be inserted into the notch 34a of the steel pipe 32 is provided at the end of the double pipe 1, and the collar 35 is inserted into the notch 34a. Afterwards, by rotating either one, the two can be connected. The number of steel pipes 32 used can be increased or decreased as needed, and the steel pipes 32 can be stored in the stand 14 when not in use. Reference numeral 32a denotes a guide collar protruding from the steel pipe 32 side in order to prevent the cores from getting out of alignment with each other during connection.

Further, in order to further ensure the above connection, a set bolt may be used, or the contact surface between the collar 35 and the flange 34 may be tapered. Furthermore, at both ends -
A flange may be provided and bolted connection may be used. Note that the pile driver 33 is supported by a frame 36. Next, the construction procedure will be explained.

In explaining the construction procedure, a case will be described in which a plurality of sand drain vibes C1, that is, sand rebags are buried in soft ground B below the water surface from a barge A, as shown in FIG. Therefore, the double pipe 1 is a steel pipe 3 for addition.
2 to a pile driver 33, and the pile driver 33 is supported by a frame 36 provided on the barge A. First, in a state where the double pipe 1 is connected to the steel pipe 32 and is held on the barge A via the holder 12, the bug 10
Pour sand into the thin part at the tip and end, and insert the tip into the double pipe 1.
so that it can be easily guided to the lower end of the inner cylinder 2. Then, the open end of the bug 10 is clamped to the bug hanging body 17 with a stopper band 19, and lifted by the chain wheel 20, and the chute 11
Then, the bag 10 is inserted into the inner cylinder 2. At this time, bug 1
If necessary, a protective frame (not shown) may be provided around 0 in order to prevent the influence of wind pressure.
Next, the sand feeding device 27 is moved so that the tip of its feeding chute 31 is positioned above one of the pair of bug hanging bodies 17, 17, and the sand in the hopper 30 is poured into the bag 10. After filling, the double pipe 1 together with the bug 10 is driven into the soft ground B by a pile driver 33. Then, the opening/closing gate 5 at the tip of the double pipe 1 is opened outward by the cylinder device 9, and when only the double pipe 1 is pulled upward in that state, the sand drain vibe C is buried in the soft ground B. can do. In addition, it is preferable to apply a slippery oil or fat to the outer periphery of the bag 10 so that the bag 10 can easily hold its position when the double pipe 1 is pulled out. Further, the shape of the inner cylinder may be expanded downward. By the way, a pair of bug hanging bodies 17, 17 are provided, and although one bug hanging body 17 is used in the above description, the other bug hanging body 17 holds the next pug to be subsequently inserted into the double pipe 1. It is intended for use in preparation. In the above embodiment, the double pipe is described as having a circular shape, but it is not limited to a circular shape, and the tension body of the opening/closing gate of the double pipe may be provided in the gap between the inner cylinder and the outer cylinder. However, it may be located outside the outer cylinder.

As described above, according to the sand drain device of the present invention,
Sand drain piles (sand drain piles) can be easily buried in soft ground, and therefore, the soft ground can be effectively improved.

Furthermore, according to the present invention, there is a pair of bug hanging bodies suspended from the lower ends of both ends of the chain, so when one bug hanging body is used, the next bug can be held and prepared on the other bug hanging body. This can improve work efficiency.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is an overall view, FIG. 2 is a cutaway view of the main part, FIG. 3 is an external view of the sand charging device, and FIG. 4 is a sectional view of a double pipe. 5 is a view taken along arrow I-1 in FIG. 4, FIG. 6 is an enlarged view of the holder, FIG. Figure 9 is the same plan view,
Figures 10 and 11 are enlarged views of the stop band, Figure 12 is an overall view of the bug, Figure 13 is a sectional view of the end of the steel pipe, and Figure 14 is an enlarged view of the stop band.
The figure is a bottom view of the same, Figure 15 is a sectional view of the end of the double pipe, and Figure 16 is a sectional view of the end of the double pipe.
The figure is a plan view of the same. 1...Double pipe, 2...Inner cylinder, 2a...
...Opening, 3...Outer cylinder, 4...Gap, 5...Opening/closing gate, 9...Cylinder device, 10... Bug, 12... Holder, 1
7... Bug hanging body, 18... Chain, 20...
...Chain wheel, 27...Sand feeding device, 31...
...Input chute, 33...Pile driver.

Claims (1)

[Claims] 1. A double pipe having an opening/closing gate at one end and an opening near the other end into which a bug can be inserted into the inner cylinder, a cylinder device supported by the double pipe to open/close the opening/closing gate, and A pair of bug hanging bodies that can be raised and lowered are suspended from the lower ends of both ends of a chain hung on a chain wheel at an upper position near the opening of the pipe, and one of the pair of bug hanging bodies is clamped to create a bug hanging body. A sand drain device comprising: a sand injecting device for injecting sand into the bag via the sand drain device; and the double pipe pile driver.