JP7407641B2 - Burying equipment and method - Google Patents

Description

The present invention relates to a burying device and a burying method.

A known method for burying a steel pipe pile in the ground is to hit the tip of the steel pipe pile with an air hammer from inside the pile and bury it.

For example, Patent Document 1 listed below discloses a method in which a piston of a hammer is reciprocated within a cylindrical body, and the impact generated at that time is transmitted to a pile to propel the pile.

In addition, in Patent Document 2 below, a hollow casing is inserted into a steel pipe and set in a shaft, an air hammer (air impact propulsion machine) inserted into the casing is activated, and the steel pipe is driven into the ground. A method to do this has been disclosed.

Patent No. 2672484 Special Publication No. 1-22440

However, in the conventional method described in Patent Document 1, when the steel pipe pile is struck with a hammer, the hammer becomes violent, making it difficult to continuously and efficiently transmit the striking force to the steel pipe pile. It can occur.

On the other hand, according to the method described in Patent Document 2, by connecting the steel pipe and the air hammer with a tension chain, it is possible to suppress the violent movement of the air hammer and the resulting deterioration of transmission efficiency. is possible. However, such a connection structure may have another problem in that the connection member (the tension chain in the case of the patent document) may be damaged due to impact. Furthermore, if a connecting member such as a tension chain is used, it is time-consuming to attach the chain to the steel pipe or air hammer before driving and remove it after driving, which tends to make the overall work more complicated. Poor work efficiency.

Therefore, the present invention is capable of continuously and efficiently transmitting the striking force from the striking device to the pipe body, and also prevents the member connecting the striking device and the pipe body from being damaged by impact. It is an object of the present invention to provide a burying device and a burying method for burying a pipe body in the ground.

One aspect of the present invention is a burying device for burying a pipe body having a hit portion in the ground, comprising:
a striking device that applies a striking force to the struck portion from inside the tube;
an inflatable bag disposed between the striking device and the inner wall of the tube;
a fluid supply device that supplies fluid to the bag;
The idea is to have the following.

In the above-mentioned embedding device, the bag can be inflated to bring the striking device into close contact with the inner wall of the tube. By performing a strike in this state, it is possible to prevent the striking device from going wild due to the impact at the time of the strike, and to suppress energy loss.

Moreover, in this embodiment, since the impact device is brought into close contact with the inner wall of the tube body using an inflatable bag, an event may occur in which the member connecting the impact device and the tube body is damaged by impact. There is no.

The above-mentioned embedding device may be used for embedding a pipe whose tip end is completely or partially closed.

In the embedding device as described above, a plurality of bags may be arranged in the circumferential direction.

In the embedding device as described above, the bags may be equally distributed in the circumferential direction.

In the above-mentioned burial device, the bag may have a circumferential shape that surrounds the striking device.

In the above-mentioned burial device, a bag may be arranged around an extension of the striking device that is attached to the device main body.

In the embedding device as described above, the striking device may be an air hammer.

In the above-mentioned burial device, the fluid supplied to the bag may be air.

In the above-mentioned burial device, the fluid supply device may be a drive device that drives the impact device.

One aspect of the present invention is a burying method for burying a pipe body in the ground using a burying device, comprising:
An inflatable bag is disposed between a striking device that applies a striking force to the tubular body from inside the tubular body and an inner wall of the tubular body,
supplying fluid to the bag;
A striking force is applied to the tube body using a striking device.

According to the present invention, it is possible to continuously and efficiently transmit the striking force from the striking device to the tube body, and to prevent the member connecting the striking device and the tube body from being damaged by impact. It is possible to provide a burying device and a burying method for burying a pipe body in the ground.

It is a diagram showing an example of the configuration of a burial device. It is a figure showing an example of the procedure when burying a pile in order of (A) - (D). FIG. 2 is a diagram showing an embedding device that employs a bag body having a structure consisting of a plurality of bags. It is a figure which shows the embedding device which arrange|positioned the bag body around the extension of a striking device. FIG. 3 is a diagram showing an embedding device in which a bag body having a structure consisting of a plurality of bags is arranged around an extension of a striking device.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Note that the same elements are given the same reference numerals and redundant explanations will be omitted. In addition, the positional relationships such as top, bottom, left, and right are based on the positional relationships shown in the drawings unless otherwise specified. Furthermore, the dimensional ratios in the drawings are not limited to the illustrated ratios. Further, the following embodiments are illustrative for explaining the present invention, and the present invention is not limited to these embodiments.

FIGS. 1 and 2 show an embodiment of the embedding device according to the present invention.

The burying device 1 is a device for burying the pile 100 in the ground G. The burial device 1 of this embodiment includes a striking device 10, a bag body 20, and an air compressor 30 (see FIG. 1).

The impact device 10 is a device that applies impact force to the pile 100 from inside the pile 100 to provide a driving force for embedding it in the ground G. The striking device 10 of this embodiment includes an air hammer 11, and further includes an extension 12 provided as necessary (see FIG. 3, etc. for the extension 12).

The air hammer 11 is a device that uses compressed air to move the hammer up and down to apply a striking force to the pile 100. The air hammer 11 of this embodiment guides compressed air supplied via a striking air hose 32A from an externally installed striking air compressor 30A to a piston (not shown) in a cylinder 11C, and guides the compressed air to a piston (not shown) in a cylinder 11C. moves the piston up and down. The piston, which has obtained kinetic energy from compressed air supplied from the outside, transmits the kinetic energy to a movable tip portion (not shown) provided inside the cylinder 11C, and the movable tip portion transfers the kinetic energy to a portion of the pile 100 (for example, By colliding with the plate 102), a driving force is given to the pile 100, and the pile 100 is buried underground.

The extension 12 is an attachment that is attached to the base end (upper end) side of the air hammer 11 as necessary (see FIG. 3, etc.). Specifically, the extension 12 is attached depending on the expected subsequent digging situation of the air hammer 11. The extension 12 is used when recovering the air hammer 11 from inside the pile 100 after being driven. In addition, specific modes of attaching the extension 12 to the air hammer 11 include a mode in which the extension 12 and the air hammer 11 are integrated in the first place, a mode in which the extension 12 and the air hammer 11 are firmly connected by welding so that they cannot be separated, and a mode in which the extension 12 and the air hammer 11 are firmly connected by welding. A mode in which the extension 12 is connected firmly so as to be separable using a tool, a fitting member, etc., a mode in which the extension 12 is connected flexibly by a wire, a spring, a chain, etc. This includes aspects, etc.

The bag body 20 is a bag that is disposed between the striking device 10 and the inner wall of the pile 100 and expands or contracts by letting air in and out. When the bag 20 is inflated by supplying air, the striking device 10 and the stake 100 are in close contact with each other via the bag 20, so to speak, in a semi-fixed state. From the viewpoint of further improving the adhesion between the striking device 10 and the pile 100 and further reducing the gap between the striking device 10 and the inner wall of the pile 100, it is desirable to use an elastic (stretchable) material such as a rubber film, for example. It is preferable to use a bag 20 made of a material that has elasticity, but it is also possible to use a bag 20 made of a material that has no or very little elasticity (stretchability).

The bag body 20 of this embodiment is a circumferential (annular or cylindrical) bag disposed so as to cover the air hammer 11, which is the main body of the striking device 10 (see FIG. 1). The circumferential bag 20 can reduce deviation in the circumferential direction of the pressing force when the impact device 10 is brought into close contact with the inner wall of the pile 100, and can achieve more uniform contact. According to this, it is possible to hold the striking device 10 during construction so that its posture does not collapse near the central axis of the pile 100, and to further improve the precision and efficiency of striking.

The air compressor 30 is used as a device (fluid supply device) that functions as at least one of a power source that supplies compressed air to the air hammer 11 to operate it, and a power source that expands and contracts the bag body 20 . This embodiment employs a striking air compressor 30A that operates the air hammer 11 and a bag air compressor 30B that expands and contracts the bag 20 (see FIG. 1). The impact air compressor 30A and the bag air compressor 30B are placed on the ground and can be operated on the ground. The impact air compressor 30A is connected to the air hammer 11 through an impact air hose 32A, and the bag air compressor 30B is connected to the bag 20 through a bag air hose 32B (see FIG. 1).

Note that the pile 100 to be constructed in this embodiment is a steel pipe pile with a pointed tip 101. In this embodiment, the target is a pile 100 whose tip 101 is closed, but it is of course possible to target a pile 100 whose tip 101 is not completely closed, such as a pile 100 in which a small hole is provided in the tip 101. It is. Further, a plate (bottom plate) 102 is provided inside the pile 100, for example near the tip 101, which functions as a hit portion (see FIG. 1, etc.). The air hammer 11 hits this plate 102 to apply a striking force to the pile 100.

In addition, the position of the plate 102 in the pile 100 shown here is only an example, and it goes without saying that it may be arranged at other positions. For example, in the case where a plurality of piles are added and buried, the position of the plate 102 may be changed as appropriate.

Next, an example of a procedure for burying the pile 100 using the burying device 1 as described above will be shown (see FIG. 2).

The impact device 10 and the bag body 20 are inserted into the pile 100 from the base end side opening on the ground G (see FIG. 2(A)). In this embodiment, the air hammer 11 is inserted into the pile 100 together with the bag 20 installed around it.

After inserting the air hammer 11 until its tip contacts the plate 102 (see FIG. 2(B)), air is supplied by the bag air compressor 30B to inflate the bag 20 (see FIG. 2(C)). . In this state, when compressed air is sent from the impact air compressor 30A to drive the impact device 10, impact force is applied and the pile 100 digs into the ground G (see FIG. 2(D)). When the pile 100 is dug to a predetermined depth and the embedding process is completed, the bag 20 is deflated and deflated each time, and the impact device 10 is recovered together with the bag 20. In addition, when recovering the striking device 10, the above-mentioned extension 12, a wire (not shown), etc. can be used as appropriate.

With the above steps, the burying of the pile 100 using the burying device 1 is completed. The above work can be performed at the construction site. Furthermore, all operations such as driving the impact device 10 and deflating the bag 20 can be performed on the ground using the air compressors 30 (impact air compressor 30A, bag air compressor 30B).

According to the burial device 1 of the present embodiment described so far, the bag 20 is inflated inside the pile 100, and the impact device 10 is brought into close contact with the inner wall of the pile 100 via the bag 20. can do. Moreover, this state is different from the case where the parts are connected in a rigid state using, for example, a tension chain (rigidly connected state), and the inflated bag body 20 is used to make the parts tightly attached in a non-rigid state. By performing a strike in this state, it is possible to moderately suppress the striking device 10 itself from rebounding and going wild due to the impact at the time of striking, and it is possible to suppress energy loss, so as a result, Impact force can be continuously and efficiently transmitted to the pile 100. Furthermore, as described above, since the blowing device 10 is brought into close contact with the pile 100 in a non-rigid state using the inflated bag body 20, the blowing device 10 is used to make a blow, so that the members connecting these parts may be damaged by the impact. Such events will not occur.

Moreover, according to the embedding device 1 of this embodiment that uses the circumferential bag 20, the gap between the impact device 10 and the inner peripheral surface of the pile 100 can be easily filled with the inflated bag 20 (Fig. etc.). According to this, it is possible to reduce the noise leaked during construction, especially the impact sound.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that those skilled in the art can come up with various changes or modifications within the scope of the idea described in the claims, and these naturally fall within the technical scope of the present invention. It is understood that

For example, in the above-described embodiment, a circumferential bag 20 was described as a specific example (see FIG. 1), but this is only a suitable example. As another example, a bag body 20 having a structure in which a plurality of bags are arranged in the circumferential direction may be adopted (see FIG. 3). With such a bag 20, it is possible to disperse the impact force during embedding, and absorb and suppress the violent movement of the impact device 10 in a well-balanced manner. When employing the above structure, it is preferable that the bags 20 are arranged so as to be equally distributed in the circumferential direction. Although not shown, the number of bag air hoses 32B can be the same as the number of bags.

Furthermore, in the case where the extension 12 is attached to the base end of the air hammer 11 as described above, the bag body 20 may be arranged around the extension 12 instead of around the air hammer 11 (see FIG. reference). In other words, in the present application, arranging the bag body 20 between the striking device 10 and the inner wall of the pile (pipe body) 100 involves placing the bag body 20 in the gap between the air hammer 11 which is the striking device main body and the inner wall of the pile 100. This includes not only arranging the bag 20 but also arranging the bag 20 in the gap between the extension 12 and the inner wall of the stake 100. The point is that it is sufficient to be able to prevent the striking device 10 from going wild either directly or indirectly. Furthermore, the bag 20 in this case may have a structure in which a plurality of bags are arranged in the circumferential direction as described above (see FIG. 5).

Further, the pile 100 to be constructed in this embodiment is only an example of a suitable target for buried construction, and piles of other shapes and structures can also be included in the construction target by the above-mentioned burying device 1. Furthermore, steel pipes that are buried horizontally underground can also be included in the construction target by the burying device 1. In short, any pipe body that can be subjected to impact force from the impact device 10 disposed inside the pipe body can be included in the construction target by the embedding device 1 of the present application.

It goes without saying that the burial work can be performed using a striking device other than the air hammer exemplified in this embodiment (for example, a hydraulically driven or electrically driven hammer, a manual hammer, etc.). Similarly, fluids other than air, such as gases other than air and liquids such as oil and water, can also be used.

Furthermore, in this embodiment, separate air compressors are used: the impact air compressor (fluid supply device) 30A and the bag air compressor (fluid supply device) 30B, but it is possible to use one air compressor for both functions. You can also use it as

INDUSTRIAL APPLICATION This invention is suitable for application to the burying apparatus and burying method which bury in the ground a pipe body (for example, a steel pipe pile) whose front end is at least partially blocked.

1... Burying device, 10... Impact device, 11... Air hammer (device main body), 11C... Cylinder, 12... Extension, 20... Bag body, 30A (30)... Impact air compressor (fluid supply device), 30B (30 )...Bag air compressor (fluid supply device), 32A (32)...Impact air hose, 32B (32)...Bag air hose, 100...Pile (pipe body), 101...Tip, 102...Plate ( (Battered part), G...Ground

Claims (10)

A burying device for burying a pipe body having a hit part in the ground,
a striking device that applies a striking force to the struck portion from inside the tubular body;
an inflatable bag disposed between the striking device and the inner wall of the tube;
a fluid supply device that supplies fluid to the bag;
A burial device comprising: 2. The embedding device according to claim 1, wherein the tubular body whose tip end is completely or partially obstructed is to be buried. The embedding device according to claim 1 or 2, wherein a plurality of said bags are arranged in a circumferential direction. The embedding device according to claim 3, wherein the bags are equally distributed in the circumferential direction. The embedding device according to claim 1 or 2, wherein the bag has a circumferential shape that covers the periphery of the striking device. The embedding device according to any one of claims 1 to 5, wherein the bag body is arranged around an extension attached to a main body of the striking device. The embedding device according to any one of claims 1 to 6, wherein the striking device is an air hammer. The burial device according to any one of claims 1 to 7, wherein the fluid supplied to the bag is air. Burying device according to any one of claims 1 to 8, wherein the fluid supply device is also a drive device for driving the striking device. A burying method when burying a pipe body in the ground using a burying device,
disposing an inflatable bag between a striking device that applies a striking force to the tubular body from inside the tubular body and an inner wall of the tubular body;
supplying fluid to the bag;
An embedding method, comprising applying a striking force to the pipe body using the striking device.

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