JP6872677B2 - Underground pile excavation casing adapter and underground pile excavation method using the adapter - Google Patents

Description

The present invention relates to an adapter used attached to a casing for excavating an underground pile circumference and a method for excavating an underground pile circumference using the adapter.

Conventionally, there are various means for excavating the underground pile circumference, but as shown in the present invention, there is currently no means for using a dedicated adapter for the underground pile circumference excavation casing.

In the above-mentioned conventional means, a device called an earth auger (hereinafter, abbreviated as auger) is attached to the end of an underground pile perimeter excavation casing (hereinafter, abbreviated as casing), the casing is erected on the ground, and the auger is rotated. Although it is excavated by letting it excavate, it has the following problems. The above-mentioned work is roughly divided into a ground group and a high place group.
Groundwork: (Connect the auger with the casing placed horizontally)
1. 1. When the casing and auger are connected horizontally and when raised by the machine body, a large load is applied to the connection between the casing and the auger, which may be damaged.
2. It is difficult to connect the auger horizontally to the casing, and this task depends on the skill of the heavy equipment operator.

High-altitude group: (Connect the auger after erecting the casing using heavy machinery)
When connecting the casing and the auger at a high place, it is necessary to use equipment such as an aerial work platform or a safety ladder when driving the joint pin to prevent it from coming off, which increases the cost or works at a high place. There is a risk involved.
In view of the above, the present invention has been invented for the purpose of providing a means capable of safely and surely performing excavation work.

The present invention has the following configuration as a means for solving the problem.
That is, one of the present inventions is
An upper adapter made of a cylinder is provided, a plate is provided on the upper part of the cylinder, a connection part made of a hexagonal pillar is erected on the upper center of the plate, and a perforated upper flange portion is provided on the outer periphery of the lower part of the cylinder. A lower adapter having a tubular body having the same diameter as the upper adapter is provided in the vicinity of the hole, and a lower flange having a hole on the outer circumference of the upper edge of the lower adapter is provided on the outer circumference of the lower edge. A perforated connection flange is provided in the above, and the above upper adapter and lower adapter can be opened and closed with a hinge, and a detent hole is drilled close to the hole in the lower collar, between the upper adapter and the lower adapter. An adapter for an underground pile peripheral excavation casing, which is characterized in that a fixed side perforated plate body, a rotating side perforated plate body, a slider case, and a slider are provided as main parts as means for maintaining the closed position of the above. Is.
In addition, the other one of the present invention is
1. 1. The first step in which an existing casing having a series of square holes is placed on the ground and a perforated flange is provided at the casing end.
2. The second step of fixing the lower adapter of the adapter shown in claim 1 to the flange of the casing with bolts and nuts.
3. 3. The third step, in which the auxiliary adapter is horizontal, inserted into the connection part of the upper adapter, and then both are fixed with joint pins.
4. The fourth step of pulling the auxiliary adapter upward with a hanging hook to make it vertical and inserting the mounting base on the lower surface of the upper adapter.
5. The fifth step is to remove the auxiliary adapter, insert the auger into the connection part of the upper adapter, fix it with the join pin, and then remove the mounting table.
6. The sixth step in which the auger is moved upward to a vertical position, the upper and lower adapters are closed, and the casing is in a vertical start-up state.
7. The seventh process that locks between both adapters by winch operation.
8. Excavation is started by rotating the casing, the rotation is stopped when the casing is at a predetermined height from the ground, the upper and lower adapters are fixed with bolts and nuts, and the wire is removed. This is an underground pile excavation method that uses an adapter for excavation casing.

The present invention has the following effects.
1. 1. Since the casing is raised in the vertical state of the connection part and put into the vertical state by using an adapter with a hinge, the load applied to this connection part can be reduced compared to the conventional method, which is common in the conventional method. It is possible to prevent damage to the existing connection.
2. Since the auger and the connection part are inserted and locked in the vertical state, it is possible to work safely and reliably without being influenced by the skill of the heavy equipment operator.
3. 3. Since the auger and casing can be locked and unlocked by operating the winch wire from the ground via the adapter, the risk of work can be avoided.

Explanation of the procedure for underground pile excavation method of the conventional example (ground structure) Explanatory drawing of the main part of underground pile excavation of the conventional example Front view of the adapter of the present invention (closed state) Front view of the adapter of the present invention (open state, partially omitted) Explanatory drawing of the main part of the adapter of the present invention (plan view, partly omitted) Left side view of the adapter of the present invention (closed state) Explanation of use of winch used in connection with the adapter of the present invention Explanatory drawing for locking and unlocking the adapter of the present invention Explanation of procedure for underground pile excavation method using the adapter of the present invention (previous stage) Explanation of procedure for underground pile excavation method using the adapter of the present invention (second stage)

Hereinafter, embodiments of the present invention will be described.
First, the conventional means will be described. FIGS. 1 and 2 show conventional groundwork means.
In the figure, reference numeral 1 denotes a casing, which is a long cylinder, and a plurality of square holes 2 penetrating the side surfaces thereof are provided on both side surfaces. Reference numeral 3 denotes a blade portion provided at the end of the casing, which is a portion in which a plurality of convex portions are provided evenly. Reference numeral 4 denotes a connection portion with the auger, which is a hexagonal column and is projected vertically to the other end of the casing. A plate is fixed to the end of the casing due to this protrusion.

FIG. 1A shows a state in which the casing is laid on the ground and placed on a predetermined long wooden prism 5 placed on the ground. Since the casing is tubular, it is stably placed. A wedge 6 for use is driven between the casing and the prism. 10 is an existing auger. This auger has a universal joint type member 11 at its upper part, a cylindrical part at its lower part, a hexagonal hole extending from the lower end to the middle thereof, and two joint pin holes 12 on its side surface. It will be drilled. A semi-circular recess 13 is provided on the side surface of the connection portion 4 described above.

The auger is inserted into the connecting portion 4, but this insertion is possible because the outer shape of the connecting portion and the inner shape of the hexagonal hole of the auger are approximately the same size. At the time of insertion, the positions of the above-mentioned joint pin hole and the semicircular recess coincide with each other, and the joint pin (not shown) is inserted here and both are fixed.
A pore is formed in the vicinity of the end of the joint pin, and a split pin or the like is inserted into the pore to prevent the joint pin from being inadvertently dropped.

Groundwork procedure:
(A) As described above, the casing is placed lying on the ground.
(B) Bring the auger suspended by the heavy equipment close to the connection part, place the lower end of the auger on the end of the connection part, tilt the auger by operating the heavy equipment, and insert the auger into the connection part by skill.
(C) Insert the joint pin and insert the retaining pin into the joint pin.
(D) Raise the casing by operating heavy machinery.
(E) The casing is rotated to perform excavation work.
(F) The casing enters the ground, and the circumference of the underground pile and the underground surface are separated.
After that, the casing is removed from the ground, the sling wire is hung on the underground pile, and the underground pile is removed by operating a heavy machine.
The above is the outline of the conventional construction method.

Apart from this, there is a means of assembling at high places. In the case of a high place group, as shown in Fig. 1 (a), a sling wire is used for the casing laid on the ground, this wire is fixed to the casing, the casing is raised vertically by heavy equipment operation, and the auger is connected. Drop it into the part from above and fix it with the joint pin. Since this fixed position is a high place on the ground, it is necessary to use an aerial work platform or a safety ladder as described above, but the former is costly and the latter is dangerous.

Next, the present invention will be described. First, the adapter used in the present invention will be described.
The adapter will be described with reference to FIGS. 3 to 8.
In the figure, reference numeral 20 denotes an upper adapter, in which a plate having the same diameter is fixed to the upper end of the cylinder, and a hexagonal columnar connecting portion 21 is fixed and erected in the center of the plate. Two semicircular recesses 22 are provided on the side surface of the connecting portion at symmetrical positions in a plan view. Reference numeral 23 denotes an upper flange portion, which is a substantially rectangular plate and is fixed to the lower end of the upper adapter. Fixing holes 24 are bored in the vicinity of the four corners of the collar.
Further, four square plate-shaped anti-rotation projecting pieces 25 are projected downward on the lower surface of the upper flange portion.

Reference numeral 30 is a lower adapter. This lower adapter has a tubular body similar to the upper adapter, and a lower collar portion 31 is fixed to the upper end thereof, and a fixing hole 32 is formed in the same manner as the upper collar portion.
Further, a square hole-shaped detent hole 33 is formed. The upper adapter and the lower adapter can be opened and closed by the hinge 34 as shown in FIGS. 3 to 4, and the positions of the fixing holes 24 and 32 coincide with each other when closed. Further, the anti-rotation piece and the anti-rotation hole also coincide with each other when closed, and this projecting piece is inserted into the anti-rotation hole. A cutting portion for passing the rotating protrusion, which will be described later, is provided on the lower collar portion.

Next, the fixing and releasing means of both adapters will be described.
In FIG. 8, 40 is a tubular slider case. Reference numeral 41 denotes a pair of fixed projecting pieces made of a perforated plate body, which are fixed to the lower flange portion at predetermined intervals. One end of the slider case is fixed to the side surface of the fixed projecting piece, and the upper portion near the other end is fixed to the slider case fixed projecting piece 42 projecting downward from the lower collar portion. Reference numeral 43 denotes a rotating projectile formed by a perforated plate body, which is projected downward on the lower surface of the upper flange portion. When the upper adapter is closed, the positions of the holes of the rotating projecting piece and the holes of the fixed projecting piece 41 coincide with each other. Reference numeral 44 denotes a round bar-shaped slider, which is located inside the slider case and can be slid horizontally within a predetermined range.

A U-shaped release wire hook 45 is projected from the left end of the slider. Reference numeral 46 denotes a release wire guide made of a perforated plate body, and 47 is a release wire. The wire end thereof is tied to and fixed to the release wire hook via the hole of the release wire guide.
Reference numeral 48 denotes a lock wire guide, which is a perforated plate body and is projected downward at an appropriate position in the slider case. 49 is a U-shaped lock wire hook, which is fixed downward to a suitable position on the lower surface of the slider.
Reference numeral 50 denotes a lock wire, one end of which is tied to and connected to the lock wire hook via a hole of the lock wire guide. A slit (not shown) having an appropriate length is provided on the lower side surface of the slider case, and the lock wire hook projects downward from the slit, that is, the movable range of the lock wire hook is restricted by this slit.

From the above configuration, it is possible to select locking and unlocking of both adapters by wire operation. That is, the upper figure of FIG. 8 is a locked state, which means that the lock wire hook and slider connected to the lock wire move to the right by pulling the lock wire, and are in contact with the slit end to the right position. Is decided.
At this time, the right end of the slider penetrates the holes of both the fixed projecting piece and the rotating projecting piece and protrudes to the right, so that the closed position of the upper adapter is maintained.
Also, by pulling the release wire, since the release wire end is connected to the release wire hook, the slider moves to the left, the lock wire hook abuts on the left end in the slit, and the slider position is the highest. It will be in the left position. At this time, since the right end of the slider passes through the inside of the rotating protrusion and is further left, the upper adapter can be opened.
The lock wire is operated by a hand-wound winch described later, and the release wire is manually operated.

Next, the excavation method using the adapter of the present invention will be described.
9 to 10 show the method of the present invention.
1. 1. Lay the square timber on the ground, place the casing with the adapter horizontally, and drive in the wedge. To attach the adapter, provide a perforated flange at the end of the casing, align the perforated flange of the lower adapter, and fix the adapter to the casing with bolts and nuts.
At this time, both adapters are in the unlocked state. (Fig. 9 ・ a)
2. With the auxiliary adapter horizontal, insert it into the upper adapter connection and then fix both with joint pins. This auxiliary adapter 35 has a hexagonal hole upward from the lower end of the cylinder and can be hung by a hook, and has a through hole on the side surface for inserting a joint pin and is inserted into the connection portion. Is possible. (Fig. 9 ・ b)
3. 3. The auxiliary adapter is moved upward to the vertical position, the upper adapter is in the vertical position, and the lower adapter is in the horizontal position. (Open state, Fig. 9 ・ c)
4. Insert the mount under the top adapter, remove the auxiliary adapter, and attach the auger. (Fig. 9 ・ d)
5. Fix the auger with a joint pin, remove the mounting table, and move the auger upward. By this upward movement, the casing rises and becomes a vertical state. (Fig. 10 ・ e)
6. Both adapters are locked by moving the wire by manual winch operation.
7. Start excavation by rotating the casing, stop the rotation when the casing is at a predetermined height from the ground, and fix both adapters to bolts and nuts using the holes provided in the collar of the upper and lower adapters. When the casing is rotated, damage to the hinge due to the load on the hinge due to rotation can be prevented from the relationship between the detent projection piece and the detent hole described above. (Fig. 10 ・ f)
8. Remove the wire.

The manual winch has the following configuration.
In FIG. 7, 60 is a substantially U-shaped contact portion in a side view, 61 is a pair of drum holding plates formed of plates that continuously project to the corresponding contact portion, and 62 is rotatably located between the drum holding plates. A drum shaft, 63 is a handle whose end is fixed to the drum shaft, and 64 is a drum fixed to the drum shaft between the drum holding plates.
When using a winch, apply the contact part to the selected square hole of the casing as shown in the figure, rotate the drum by operating the handle, wind the wire around the drum, perform the wire operation described above, and lock the adapter. be able to. The winch is equipped with a ratchet mechanism or a handle lock mechanism (not shown).
The contact portion can be pressed and contacted with the square hole of the casing by wire tension to hold the position. This winch mechanism also rotates while excavating as the casing rotates, but since the casing gradually enters the ground, excavation work can be carried out continuously by removing this winch and replacing it with a square hole further above. ..

Although the present invention has been described above, the present invention can avoid damage and danger during work, which has been a problem in the conventional method. In the present invention, since the connection portion is pulled up vertically, it can withstand a larger load than the conventional method of pulling up horizontally, and it is similar to the conventional method in which a person works at a high place for remote work by wire operation. It has no work risk. The square holes in the casing are for releasing the pressure inside the casing during excavation. Further, the above-mentioned example is an example of implementation, and may be another configuration of approximation.
As described above, according to the present invention, it is possible to obtain an adapter for an underground pile peripheral excavation casing and an underground pile peripheral excavation method using the adapter, which have various advantages.

1 Casing 2 Square hole 3 Blade part 4 Connection part 10 Auger 11 Universal joint member 12 Joint pin hole 13 Semi-circular recess 20 Upper adapter 21 Connection part 22 Semi-circular recess 23 Upper flange part 24 Fixing hole 25 Anti-rotation protrusion 30 Lower part Adapter 31 Lower flange 32 Fixing hole 33 Anti-rotation hole 34 Hinge 35 Auxiliary adapter 40 Slider case 41 Fixed protrusion 42 Slider case Fixed protrusion 43 Rotating protrusion 44 Slider 45 Release wire hook 46 Release wire guide 47 Release wire 48 Lock Wire guide 49 Lock wire hook 50 Lock wire 60 Contact part 61 Drum holding plate 62 Drum shaft 63 Handle 64 Drum

Claims (3)

An upper adapter made of a cylinder is provided, a plate is provided on the upper part of the cylinder, a connecting portion made of a square pillar is erected on the upper center of the plate, and a perforated upper flange is provided on the outer periphery of the lower part of the cylinder. In addition to providing a lower adapter made of a cylinder having the same diameter as the upper adapter by providing a detent projection piece in the vicinity of the hole, in the lower adapter, a lower flange portion having a hole on the outer circumference of the upper edge is placed on the outer circumference of the lower edge. A perforated connection flange is provided, and the above upper adapter and lower adapter are connected so that they can be opened and closed with a hinge, and a detent hole is drilled close to the hole in the lower collar, and between the upper adapter and the lower adapter. An adapter for underground pile perimeter excavation casing, which is characterized in that a fixed-side perforated plate body and a slider case and a slider are provided as main parts on the upper part of the lower adapter as a means for maintaining the closed position. A rotating projectile made of a perforated plate is projected downward on the lower surface of the upper flange of the upper adapter, and a fixed projecting piece made of a perforated plate is projected downward on the lower end of the lower adapter of the lower adapter. A cylindrical slider case is fixed to the side surface of the fixed protrusion, a slider is positioned inside the slider case, a perforated lock wire guide is provided in the slider case, and a perforated release wire guide is provided in the lower collar. A slit is provided in a part of the lower part of the slider case, and a lock wire hook projecting downward from the slider is positioned so as to project downward into the slit, and a perforated release wire hook is attached to the end of the slider to attach the release wire hook to the release wire hook. Select to lock or unlock the upper and lower adapters by pulling the lock wire or release wire downward by tying the release wire through the inside of the release wire guide and tying the lock wire to the lock wire hook through the lock wire guide. The adapter for underground pile circumference excavation casing according to claim 1, which is configured to be possible and serves as a means for maintaining the closed position of the upper adapter and the lower adapter as described above. 1. 1. The first step in which an existing casing having a series of square holes is placed on the ground and a perforated flange is provided at the casing end.
2. The second step of fixing the lower adapter of the adapter shown in claim 1 to the flange of the casing with bolts and nuts.
3. 3. The third step, in which the auxiliary adapter is horizontal, inserted into the connection part of the upper adapter, and then both are fixed with joint pins.
4. The fourth step of pulling the auxiliary adapter upward with a hanging hook to make it vertical and inserting the mounting base on the lower surface of the upper adapter.
5. The fifth step is to remove the auxiliary adapter, insert the auger into the connection part of the upper adapter, fix it with the join pin, and then remove the mounting table.
6. The sixth step in which the auger is moved upward to a vertical position, the upper and lower adapters are closed, and the casing is in a vertical start-up state.
7. The seventh process that locks between both adapters by winch operation.
8. Excavation is started by rotating the casing, the rotation is stopped when the casing is at a predetermined height from the ground, the upper and lower adapters are fixed with bolts and nuts, and the wire is removed. Underground pile excavation method using an adapter for excavation casing.

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