JP2003171932A - Ready-made pile burying construction method and device used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ready-made pile burying construction method capable of efficiently compacting a filler with a simple structure, and capable of facilitating top end control and centering of a ready-made pile. <P>SOLUTION: This ready-made pile burying method builds up the ready-made pile 4 in an excavated excavation hole 2, and fills and compacts the filler 3 in a clearance part between the built-up pile 4 and an excavation hole wall, and has a process of pushing in the pile tip of the pile 4 up to the expected depth vicinity while rotating in the screwing-in direction of an agitating blade 52 by fitting a compacting casing 5 around the pile 4 built in the excavation hole 2 by using the compacting casing 5 for projecting the spiral agitating blade 52 on an outer peripheral surface of a cylindrical casing body 51, and projecting a pressing plate 53 inclining in the same direction as the agitating blade on a tip part outer peripheral surface of the casing body 51, and a process of inputting the filler 3 such as slag, gravel, and a crushed stone from aboveground part to a clearance part between the pushed-in compacting casing 5 and the excavation hole wall, and compacting the filler 3 of a tip part of the compacting casing 5 while pushing in the filler 3 by an inclined face of the pressing plate 53 by periodically or intermittently pushing down the casing while inversely rotating and gradually pulling up the compacting casing 5. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for burying ready-made piles (hereinafter, simply referred to as "pile" in the present specification), and particularly to a minimum amount of filler such as slag, gravel and crushed stone. It is filled between the pile and the hole wall by force to improve the ground that is easily liquefied, and in particular, slag that has expansiveness and solidification is used as the filling material, and this slag is filled into the outer periphery of the pile and compacted. The present invention relates to a method for burying ready-made piles for the purpose of expanding and solidifying the slag and compacting laterally the pile ground to increase the bearing capacity.

[0002]

2. Description of the Related Art The applicant of the present application has developed a method of burying a pile filled with a filler with a low vibration and a low noise. As one of the methods for efficiently and reliably filling the filler. Using a casing with a double pipe structure having an inner pipe and an outer pipe, when pulling up the inner and outer pipe casings, insert a filler from the gap between the inner pipe casing and the pile, and move the inner pipe casing up and down to lower the casing. We are developing a method to tamper the filler that is left behind.

[0003]

[Patent Document 1] Japanese Patent Laid-Open No. 11-209976

[Patent Document 2] Japanese Patent Laid-Open No. 11-209973

[0004] In this case, the filling material around the buried pile is sufficiently compacted, so that the original peripheral surface supporting force of the pile can be obtained even in the soft ground, and the presence of the filling material in the ground at the time of the earthquake Excessive pore water pressure is dissipated and liquefaction is suppressed.

[0005]

However, in the conventional method for burying prefabricated piles described above, a casing having a double pipe structure is used, and the inner pipe casing is moved up and down so that fillers such as crushed stone, gravel, and slag are added to the casing tip portion. From compacting with
There is a problem in that frictional resistance acts on the entire casing with the filler in the pipe, and thus a large force is required to move the inner pipe casing up and down. Also,
Since the filler is put in the gap between the inner pipe casing and the pile,
The filling material is clogged in the inside of the pipe of the inner pipe casing, and by moving the inner pipe casing up and down, the pile up phenomenon occurs in competition with the filling material in the pipe, making it difficult to control the top of the pile and There is also a problem that it is difficult to center the pile by moving vertically.

In view of the problems of the above-mentioned conventional burying method for ready-made piles, the present invention has a simpler structure and efficiently compacts the filling material, and facilitates the pile top management and centering. The purpose is to provide a method for burying ready-made piles.

[0007]

In order to achieve the above object, the method for burying a ready-made pile of the present invention is to build a ready-made pile in an excavated excavation hole and to provide a gap between the built-up ready-made pile and the excavation hole wall. In a method of burying a ready-made pile in which a filling material is filled and compacted, a spiral stirring blade is projected on the outer peripheral surface of the tubular casing body, and the same stirring blade is used on the outer peripheral surface of the distal end portion of the tubular casing body. Using a compacting casing with a pressing plate that inclines in the direction, the compacting casing is fitted onto the prefabricated pile built in the excavation hole, and the pile tip of the prefabricated pile is rotated to the planned depth while rotating in the screwing direction of the stirring blade. The process of pushing to the vicinity, and the filler such as slag, gravel, crushed stone, etc. is put into the gap between the pushed compaction casing and the excavation hole wall from the ground, and the compaction casing is not rotated backwards and gradually pulled up. Et al., Periodically or intermittently depressed, characterized by a step of compacting the filling material compaction casing tip while pushing the filling material by the slope of the pressure plate.

According to this method for burying ready-made piles, a spiral stirring blade is projected on the outer peripheral surface of the tubular casing body, and the tip outer peripheral surface of the tubular casing body is pressed by an inclination in the same direction as the stirring blade. Using a compacted casing with a protruding plate,
The process of fitting the compaction casing onto the ready-made pile built in the drill hole and pushing the tip of the pile of the ready-made pile to near the planned depth while rotating in the screwing direction of the stirring blade, and the compacted casing and the drill hole wall Filling material such as slag, gravel, crushed stone, etc. into the gap part of the above from the ground part, while pushing down the compaction casing in the reverse rotation and gradually pulling up, periodically or intermittently push down, and the filling material is pushed by the slope of the pressing plate. Since it has a step of compacting the filling material at the tip of the casing while pushing it in, the filling material such as slag is surely compacted around the pile, and the relative density of the ground around the excavation hole is increased to support the pile. Can increase
Furthermore, the pile can be kept at the center position of the excavation hole by rotating the compaction casing, and the accuracy of the pile core can be improved. Further, since the stirring blade feeds the charged filler material downward, while preventing the charged filler material from staying in the gap between the drill hole wall and the compaction casing,
The filler can be uniformly distributed around the periphery and compacted, and can be guided to the position of the pressing plate at the tip of the casing.Because of the simple mechanism, the device itself becomes simple and lightweight, and general-purpose pile driving is possible. Can be attached to the construction machine.

In this case, a stopper piece that expands in the rotational direction of the ready-made pile is provided at the tip of the ready-made pile, and a stopper for locking the pile head of the ready-made pile is provided at the upper part inside the tube of the compaction casing. By engaging the upper part of the pile and compacting and rotating the casing, the ready-made pile can be rotated and the stopper piece can be expanded.

As a result, the expanded stopper piece is allowed to bite into the filler and the hole wall to improve the fixing property of the pile and prevent the pile from rising together when the casing is pulled up.
It is possible to easily manage the top of the pile.

Further, before the ready-made pile is built in the excavation hole, the slag containing the solidifying agent may be introduced into the excavation hole to strengthen the ground at the tip of the pile.

As a result, the supporting force of the pile can be further improved.

As the filler, slag having expandability and solidification can be used. As the slag having the expandability and solidification property, steelmaking slag (converter slag and / or electric furnace slag (oxidizing slag and / or reducing slag) is referred to, and here, particularly, of steelmaking slag that has not been subjected to aging treatment. In addition, it refers to steel-making slag whose expansion has not been lost, such as steel-making slag whose expansion has been adjusted by partially performing aging treatment.), Refuse incineration slag, sludge slag, or a mixture of two or more thereof. Can be used. Furthermore, slag having expandability and solidification property is used alone, in addition to this, steel slag that lost expansion property, blast furnace slag, ferroalloy slag, granulated slag, copper smelting slag, red mud, fly ash, waste incineration. Industrial waste such as ash, crushed glass, waste gypsum, concrete waste, gypsum, quicklime, cement, crushed stone, earth and sand, building materials such as clay, artificial materials, one or more kinds of minerals, expanded, It is possible to use a slag that has the properties of solidification and slag that can utilize the expandability and solidification.

As a result, after the construction, the slag having expandability and solidification property such as the steelmaking slag filled in the outer peripheral portion of the pile absorbs water and expands and solidifies, so that the gap between the excavation hole for building the pile and the pile is narrow. Even in the case, the filling material can be uniformly filled without forming cavities, and the compressive force can be transmitted to the deep layer, so that the ground around the pile can be easily and statically pressured. In addition, it can be reliably compacted, and the relative density of the ground can be increased, which can further increase the bearing capacity of the pile. Further, it is possible to effectively utilize steelmaking slag, which is industrial waste.

Further, when forming a drill hole, it is possible to build a ready-made pile in the drill hole drilled by an auger screw having a spiral band fixed at an appropriate position on the outer peripheral portion of a general-purpose auger screw blade.

As a result, collapsibility of the hole wall can be prevented and the hole wall can be retained, and the excavated soil can be retained without dropping from the screw blades, so that the excavated soil can be reliably lifted to the ground. can do.

Further, in the apparatus used for burying the ready-made pile, the stirring blade is obliquely projected on the outer peripheral surface of the tubular casing body fitted onto the ready-made pile, and the tip end outer peripheral surface of the tubular casing body is provided. It is possible to provide a compacting casing in which a pressing plate inclined in the same direction as the stirring blade is provided in a protruding manner.

As a result, it is possible to surely fill and compact the filling material such as slag around the pile and to increase the relative density of the ground to enhance the support force of the pile. Further, since the pile has a property of moving to the center by filling the packing material around the pile while rotating the compacting casing, the pile core accuracy can be improved. In addition, since the stirring blade feeds the charged filler material evenly around the casing, the charged filler material is prevented from staying in the gap between the borehole wall and the compacting casing, and the filler material is removed. It can be guided to the position of the pressing plate of the compaction casing while uniformly dispersing. Furthermore, since the mechanism is simple, the device itself is simple and lightweight, and can be attached to a general-purpose pile driving machine.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a method for burying a ready-made pile according to the present invention will be described below with reference to the drawings.

1 to 2 show an embodiment of a method for burying a ready-made pile according to the present invention. In this method of burying ready-made piles, first, as shown in FIGS. 1 (a) to 1 (c), the auger screw 1 is used to excavate the ground. In this case, the auger screw 1 has a spiral band 13 on the outer peripheral portion of the screw blade 11 provided on the screw shaft 12, as shown in FIG.
At least partially fixed. Then, while the auger screw 1 is normally rotated in the excavation direction, the excavation is performed to a predetermined depth, and as shown in FIG.
As shown in FIG. 3, the spiral band 13 can prevent the hole wall from collapsing and hold the excavation hole by keeping the excavated soil on the screw blades 11 by pulling the excavated soil while continuing to rotate forward. It can be surely fried on the ground. In the present embodiment, the spiral band 13 is not particularly limited, but is 1/2 to 1/4 of the pitch of the screw blades 11, preferably 1
It has a width of about / 3 and is formed so as to be alternately arranged so as to shift the phase by 180 degrees for each pitch of the screw blades 11 and to hang vertically from the screw blades 11. The function of maintaining the excavated soil on the screw blades 11 can be enhanced. In addition, the auger screw 1 has a screw blade 11 at an upper portion 1a formed to have an enlarged diameter, whereby an excavation hole 2 having a diameter of about 2 to 3 m from the ground is enlarged and excavated. The filling material 3 such as slag is easily added. Then, the auger screw 1 includes the upper portion 1a and the screw blade 1
Between the lower part 1c having the spiral band 13 fixed to the outer peripheral part of 1, a diameter slightly smaller than the outer diameter of the screw blade 11 of the lower part 1c,
Specifically, by providing the intermediate portion 1b having a screw blade 11 having a diameter of about several percent, it is possible to further maintain the soundness of the hole wall, and further, the spiral band 13 is provided on the outer peripheral portion of the screw blade 11. The excavation part 1d is provided below the lower part 1c to which is fixed.

Next, as shown in FIGS. 1 (d) to 2 (a), a filler such as slag, preferably a mixed slag in which a solidifying material is added as a tip reinforcing material from the ground into the excavation hole 2. Three
1 is charged to a height of about 2D with respect to the diameter D of the tip of the auger screw 1. In this case, steelmaking slag can be used as the slag, and granulated slag, oxidized slag, reducing slag (before aging), gypsum, blast furnace slag, cement, waste concrete, etc. can be used as the additive.

Then, piles (here, joint piles) 4 are built in the excavation hole 2 so as to be pushed up against the mixed slag 31, and as shown in FIG. Then, the compacted casing 5 is inserted into the excavation hole 2. As shown in FIGS. 4 to 5, the compacted casing 5 has a plurality of spiral stirring blades 52 projecting from the outer peripheral surface of the tubular casing body 51, and the outer peripheral surface of the distal end portion of the tubular casing body 51. , A plurality of pressing plates 53 inclined in the same direction as the stirring blade 52 are provided in a protruding manner. The stirring blade 52 is formed with a steep inclination angle relatively close to the vertical, and the pressing plate 53 is formed with a gentle inclination angle relatively close to the horizontal. In this case, the distal end of the tubular casing body 51 may have a cylindrical shape, or may have a serrated shape 51a along the shape of the pressing plate 53 as in the modification shown in FIG. 6 (shown below. The same applies to other modifications). In this way, by making the tip of the tubular casing main body 51 into the sawtooth shape 51a, a filler such as slag (mixed slag 3 is added to the gap between the pile 4 and the tubular casing main body 51.
It is possible to prevent 1) from being clogged and the pile 4 to rise together. The cylindrical casing body 51 has a stirring blade 52 near the pressing plate 53 as in the modification shown in FIG.
May be replaced with a plurality of stirring rods 54, or each pressing plate 53 may be provided so as to project over the entire circumference as in the modification shown in FIG.

On the other hand, as shown in FIG. 9, a stopper piece 41, which expands in the rotation direction of the pile 4, is provided at the tip of the pile 4, and the upper portion of the compacting casing 5 and the upper portion of the pile 4 are provided. The stopper piece 41 can be expanded by engaging with and rotating the compacting casing 5 and the pile 4. The stopper piece 41 is pivotally attached to the tip of the pile 4 so as to be swingable, and in the forward rotation of the pile 4, as shown by the solid line in FIG.
By abutting on the bolt 42, a state in which the part is projected from the peripheral surface of the pile 4 is maintained in an obliquely inclined state to contribute to excavation, and when the pile 4 is rotated in the reverse direction, the projecting portion is a slag or the like. It is swung by friction with the filler (mixing slag 31) and spreads to the position shown by the chain line in contact with the positioning protrusion 43. In this case, the stopper piece 41 is formed in a rectangular shape, and as shown in FIGS. 10 (a) and 10 (b), a notch 41b for obtaining a frictional force with a filler (mixed slag 31) such as a slag is formed at the tip. It is possible to use any shape such as the one formed with. In addition, what is shown in FIG.
By bolting a bolt 44 inserted in a bolt hole 41a formed in the stopper piece 41 into a screw hole 45 formed in the tip portion of the pile 4, the stopper piece 41 is pivotally pivoted to the tip portion of the pile 4. Further, when the pile 4 is rotated in the normal direction, the positioning protrusion 42a that contacts the positioning protrusion 43 formed on the pile 4 and holds the stopper piece 41 is attached to the stopper piece 4.
1 is formed. Further, as shown in FIG. 11, the engagement between the pile 4 and the compacting casing 5 is performed by the bolt 46 screwed into the prestress screw hole at the upper end of the pile 4,
It is performed by fitting the pile head coupling 55 provided on the upper part of the compacting casing 5 with the dharma hole 56. In addition,
As shown in FIGS. 10C and 10D, the dharma hole 56 is provided with a bolt stopper 57 that prevents the head of the bolt 46 and the dharma hole 56 from being caught. This allows
By pressing the compaction casing 5 in the forward rotation,
The dharma hole of the compaction casing 5 and the bolt of the pile 4 are fitted together, and as shown in FIG. 2C, the pile 4 is integrated with the tip of the pile 4 partially protruding from the compaction casing 5, and the compaction casing is formed. 5 Tip blade and the tip of the pile 4 are fixed at a predetermined depth in the slag. In addition, the stopper piece 41 that has expanded
Can bite into the filling material 3 and the hole wall, prevent the pile 4 from rising, and facilitate the management of the top end of the pile 4. When the compaction casing 5 is rotated in the reverse direction, the bolts of the pile 4 separate from the dharma holes of the compaction casing 5, and the pile 4 and the compaction casing 5 are separated.

After confirming the self-supporting of the pile 4, as shown in FIG. 2 (d), the filler 3 such as slag is put in the gap between the compacted casing 5 and the wall of the excavation hole.
While the compaction casing 5 is rotated in the reverse direction and gradually pulled up, the compaction casing 5 is periodically or intermittently pushed down, and the filler 3 is compacted while being pushed by the inclined surface of the pressing plate 53. Specifically, while the compacting casing 5 is rotated in the reverse direction, a predetermined amount of the filler 3 is charged from the ground, and then the compacting casing 5 is inserted.
Is gradually raised to a predetermined height (about 30 cm in this embodiment), then the compacting casing 5 is pushed down, and the pushing resistance caused by the slanted surface of the pressing plate 53 rubbing the filling material 3 is confirmed. Then, after confirming this pushing resistance, the filler 3 is charged again to raise the compaction casing 5 to a predetermined height, and then the compaction casing 5
And press down to check the pushing resistance caused by the slant surface of the pressing plate 53 rubbing the filling material 3. By repeating such an operation, as shown in FIG.
Create a slag layer around the pile 4. When the construction is completed, the compacted casing 5 is on the ground. In this way, the compacting casing 5 is reversely rotated and gradually pulled up, and is periodically or intermittently pushed down, and the filler 3 is compacted while being pushed by the inclined surface of the pressing plate 53 to compact the filler 3 such as slag. The ground around the excavation hole 2 can also be compacted via this.

In this case, the filler 3 contains CaO.
It is possible to use a slag that contains expandable and solidifying components such as MgO and MgO and that has expandability and solidifying properties. As the slag having expandability and solidifying property, steel slag (converter slag and / or electric furnace slag (oxidizing slag and / or reducing slag) is referred to, and here, particularly, aging treatment (specifically, particularly For example, but not limited to, holding in steam at about 100 ° C. for about 100 hours,
In addition to steelmaking slag that has not been subjected to stabilization treatment by placing it outdoors for a long period of time, steelmaking slag that does not lose its expandability, such as steelmaking slag whose expansion has been adjusted by partially performing aging treatment, Say. ), Waste incineration slag, and sludge slag, or a mixture of two or more thereof can be used. Furthermore, slag having expandability and solidification property is used alone, in addition to this, steel slag that lost expansion property, blast furnace slag, ferroalloy slag, granulated slag, copper smelting slag, red mud, fly ash, waste incineration. Industrial waste such as ash, crushed glass, waste gypsum, concrete waste, gypsum, quicklime, cement, crushed stone, earth and sand, building materials such as clay, artificial materials, one or more kinds of minerals, expanded, It is possible to use a slag that has the properties of solidification and slag that can utilize the expandability and solidification.
As described above, by using the expandable and solidifying slag for the filler 3, after the construction, the expandable and solidifying slag such as the steelmaking slag filled in the outer peripheral portion of the pile 4 absorbs water and expands. By solidifying, the filler 3 can be uniformly filled without forming a cavity even when the gap between the excavation hole 2 for building the pile 4 and the pile 4 is narrow, and the compressive force can be applied to the deep portion. Can be transmitted, the ground around the pile 4 can be easily and statically and reliably compacted, and the relative density of the ground can be increased, whereby
Further, the supporting force of the pile 4 can be increased. Further, it is possible to effectively utilize steelmaking slag, which is industrial waste.

Thus, according to the method for burying ready-made piles of this embodiment, the spiral stirring blade 52 is projected on the outer peripheral surface of the cylindrical casing body 51, and the stirring is performed on the outer peripheral surface of the distal end portion of the cylindrical casing body 51. Pressing plate 5 inclined in the same direction as the blade 52
While using the compaction casing 5 having the protruding portion 3, the compaction casing 5 is fitted onto the pile 4 built in the excavation hole, and the pile 4 is pushed to near the planned installation depth while rotating in the screwing direction of the stirring blade 52. While charging the packing material 3 such as slag into the gap between the pressed compaction casing 5 and the wall of the excavation hole, the compaction casing 5 is reversely rotated and gradually pulled up, and is periodically or intermittently pushed down. Since the filler 3 is pressed and compacted by the inclined surface of the plate 53, the filler 3 at the tip of the casing 5 is compacted.
The packing material 3 such as slag can be reliably compacted around the pile 4, and the relative density of the ground can be increased to enhance the supporting force of the pile 4. Further, the pile 4 can be rotated and compacted by rotating the compaction casing 5. Since the solidified filler 3 has a property of moving to the center, the pile core accuracy can be improved. Further, since the filler 3 charged by the stirring blade 52 is evenly sent to the periphery of the casing downward, the charged filler 3 is prevented from staying in the gap between the borehole wall and the compacting casing 5. , The filler 3 can be evenly dispersed and compacted and guided directly to the position of the pressing plate 53 of the casing 5. Further, since it is a simple mechanism, the device itself becomes simple and lightweight, and general-purpose pile driving is possible. Can be attached to the construction machine.

The compacted casing 5 of this embodiment is also used.
Is provided with an agitating blade 52 projecting obliquely on the outer peripheral surface of the tubular casing main body 51 that is fitted onto the pile 4, and a pressing force that is inclined in the same direction as the agitating blade 52 is applied to the outer peripheral surface of the distal end portion of the tubular casing main body 51. Since the compaction casing 5 provided with the plate 53 projecting is provided, the filler 3 such as slag can be reliably compacted around the pile 4, and the relative density of the ground can be increased to enhance the support force of the pile 4. Furthermore, since the pile 4 has the property of moving to the center by the rotation of the compacted casing 5 and the compacted filling material 3, the pile core accuracy can be improved. Further, since the stirring blade 52 sends the charged filler material 3 downward, the charged filler material 3 is prevented from staying in the gap between the hole wall and the compacting casing 5, and the filler material 3 is retained. It can be put directly into the position of the pressing plate 53 of the compacting casing 5 while uniformly dispersing it. Furthermore, since it is a simple mechanism, the device itself becomes simple and lightweight, and it can be attached to a general-purpose pile driving machine. You can

Although the method for burying a ready-made pile according to the present invention has been described above based on the embodiments thereof, the present invention is not limited to the structures described in the above embodiments, and is within a range not departing from the spirit thereof. The configuration can be changed as appropriate.

[0029]

According to the method for burying ready-made piles of the present invention, a spiral stirring blade is projected on the outer peripheral surface of the cylindrical casing body, and a stirring blade is formed on the outer peripheral surface of the distal end portion of the cylindrical casing body. Using a compaction casing that projects a pressing plate that inclines in the same direction, fit the compaction casing onto the prefabricated pile built in the excavation hole, and plan the tip of the prefabricated pile while rotating in the screwing direction of the stirring blade. The process of pushing to near the depth,
Filling material such as slag, gravel, and crushed stone from the ground into the gap between the compacted casing that has been pushed in and the borehole wall, while rotating the compacted casing in the reverse rotation and gradually pulling it up, either periodically or intermittently. Since it has a step of pressing down and compacting the filler at the tip of the casing by pressing the filler with the slope of the pressing plate, the filler such as slag is surely compacted around the pile,
It is possible to increase the relative density of the ground around the excavation hole to increase the bearing capacity of the pile, and further to keep the pile at the center position of the excavation hole by rotating the compaction casing, which improves the accuracy of the pile core. it can. In addition, since the stirring blade feeds the charged filler material downward, it prevents the charged filler material from staying in the gap between the borehole wall and the compacting casing, and evenly disperses the filler material around the periphery. It is possible to guide to the position of the pressing plate at the tip of the compacting casing while making it possible. Further, since it is a simple mechanism, the device itself becomes simple and lightweight, and it can be attached to a general-purpose pile driving machine.

Further, at the tip of the pile, a stopper piece that expands in the rotation direction of the ready-made pile is provided at the tip of the pile, and a stopper for locking the pile head of the ready-made pile is provided in the upper part of the compaction casing tube. By engaging the upper portion of the ready-made pile, rotating the ready-made pile by rotating the compaction casing, by expanding the stopper piece, the expanded stopper piece bites into the filler and the hole wall, It is possible to improve the anchoring property of the pile and prevent the pile from rising together when the casing is pulled up, and it is possible to easily manage the top end of the pile.

Further, before the ready-made pile is built in the excavation hole, a slag containing a solidifying agent is introduced into the excavation hole to strengthen the ground at the tip of the pile, thereby further improving the bearing capacity of the pile. You can

Further, by using slag having expandability and solidification as the filler, after the construction, the slag having expandability and solidification such as steel slag filled in the outer peripheral portion of the pile absorbs water and expands and solidifies. By doing so, even if there is a small gap between the pile drilling hole and the pile, the filling material can be uniformly filled without forming cavities, and the compressive force can be transmitted to the deep layer. The soil around the pile can be easily and securely compacted with a static pressure, the relative density of the soil can be increased, and the supporting force of the pile can be further increased. Further, it is possible to effectively utilize steelmaking slag, which is industrial waste. As the slag having the expandability and the solidifying property, a steelmaking slag,
One type or a mixture of two or more types of refuse incineration slag and sludge slag can be used, and the slag having expandability and solidification property is used alone, and in addition to this, steelmaking slag having lost expansion property, blast furnace Industrial waste such as slag, ferroalloy slag, granulated slag, copper smelting slag, red mud, fly ash, waste incineration ash, glass crushed material, waste gypsum, concrete waste materials, gypsum, quicklime, cement, crushed stone,
It is possible to use a slag having a expandability and a solidification property, which is a mixture of one or more kinds of building materials such as earth and sand and artificial materials, artificial materials, and minerals and which can utilize the expandability and the solidification property.

Further, when a drill hole is formed, a ready-made pile is built in the drill hole drilled by an auger screw having a spiral band fixed at an appropriate position on the outer peripheral portion of a general-purpose auger screw blade. The collapsibility of the wall can be prevented, the hole wall can be held, the excavated soil can be retained without dropping from the screw blades, and the excavated soil can be reliably lifted to the ground.

Further, in the apparatus used for burying the ready-made pile, the stirring blade is obliquely projected on the outer peripheral surface of the cylindrical casing body fitted onto the pile, and the outer peripheral surface of the tip end portion of the cylindrical casing body is By providing a compaction casing that projects a pressure plate that is inclined in the same direction as the stirring blade, the slag and other filling materials are reliably filled and compacted around the pile, and the relative density of the ground is increased to support the pile. You can increase your strength. Further, since the pile has a property of moving to the center by filling the packing material around the pile while rotating the compacting casing, the pile core accuracy can be improved. In addition, since the stirring blade feeds the charged filler material evenly around the casing, the charged filler material is prevented from staying in the gap between the borehole wall and the compacting casing, and the filler material is removed. It can be guided to the position of the pressing plate of the compaction casing while uniformly dispersing. Furthermore, since the mechanism is simple, the device itself is simple and lightweight, and can be attached to a general-purpose pile driving machine.

[Brief description of drawings]

FIG. 1 shows an embodiment of a method for burying ready-made piles of the present invention,
(A)-(c) is sectional drawing which shows a 1st process, (d) is a 2nd figure.
It is sectional drawing which shows a process.

FIG. 2 shows an embodiment of a method for burying ready-made piles according to the present invention,
(A) is a sectional view showing a third step, (b) is a sectional view showing a fourth step, (c) is a sectional view showing a fifth step, (d) is a sectional view showing a sixth step, (e) 8A] is a sectional view showing a seventh step. Is.

FIG. 3 shows an auger screw used in the method for burying a ready-made pile according to the present invention, (a) is a front view of the whole, and (b) is a front view of a lower part.

FIG. 4 shows a compacted casing used in the method for burying ready-made piles according to the present invention, (a) is a front view excluding the tip portion,
(B) is a sectional view taken along line XX of (a).

5A and 5B show the same compacted casing, FIG. 5A is a front view showing a tip portion, FIG. 5B is a side view of the same, and FIG.

FIG. 6 shows a modified example of the compaction casing, (a)
Is a front view showing the tip portion, (b) is a side view of the same, and (c) is a plan view of the same.

FIG. 7 shows a modified example of the compacted casing, (a)
Is a front view showing the tip portion, (b) is a side view of the same, and (c) is a plan view of the same.

FIG. 8 shows a modified example of the compacted casing, (a)
Is a front view showing the tip portion, and (b) is a plan view of the same.

FIG. 9 is a bottom view showing a stopper piece at the tip of the pile.

FIG. 10 shows a stopper piece at the tip of the pile, (a) a front view of the stopper piece, (b) a bottom view of the same, (c) a front view of the tip portion of the pile on which the stopper piece is arranged, (d) ) Is the bottom view,
(E) is a front view of a bolt for pivotally attaching the stopper piece,
(B) is a bottom view of the same.

FIG. 11 shows the engagement of the pile with the compaction casing,
(A) is a sectional front view, (b) is the same plan view, (c) is an enlarged plan view of a dharma hole, and (d) is the same enlarged sectional view.

[Explanation of symbols]

1 auger screw 11 screw blades 12 screw shaft 13 spiral band 2 drill holes 3 Filling material 31 mixed slag 4 piles 41 Stopper piece 5 Compacted casing 51 tubular casing body 52 stirring blade 53 Press plate 54 Stir bar 55 pile head coupling 56 Dharma hole 57 bolt stopper

Claims (8)

[Claims] 1. A method for burying a ready-made pile in which a ready-made pile is built in an excavated excavation hole and a gap between the built-in ready-made pile and the excavation hole wall is filled and compacted, wherein a tubular casing main body is used. Use a compaction casing that projects a spiral stirring blade on the outer peripheral surface and a pressing plate that inclines in the same direction as the stirring blade on the outer peripheral surface of the tip of the cylindrical casing body. The process of fitting the compaction casing onto the prefabricated pile and rotating it in the screwing direction of the stirring blade to push the pile tip of the prefabricated pile to near the planned depth, and the ground between the pushed compaction casing and the borehole wall. While charging the slag, gravel, crushed stone, and other fillers from the above parts, the compaction casing is rotated in the reverse direction and gradually pulled up, and is periodically or intermittently pushed down, and the fillers are pushed in by the slope of the pressing plate. And compacting the filling material at the tip of the casing while compacting it. 2. A stopper piece that expands in the direction of rotation of the ready-made pile is provided at the tip of the ready-made pile, and a stopper for locking the pile head of the ready-made pile is provided at the upper part inside the tube of the compaction casing. The method for burying a ready-made pile according to claim 1, wherein the ready-made pile is rotated by engaging the upper part and rotating the compaction casing to rotate the ready-made pile. 3. The method according to claim 1 or 2, wherein before the ready-made pile is built in the excavation hole, slag containing a solidifying agent is introduced into the excavation hole to strengthen the ground at the tip of the pile. Buried construction method for ready-made piles. 4. The method for burying a ready-made pile according to claim 1, 2 or 3, wherein a slag having expandability and solidification is used as a filler. 5. The method for burying prefabricated piles according to claim 4, wherein the slag having expandability and solidification is made of one or a mixture of steelmaking slag, refuse incineration slag, and sludge slag. . 6. A slag having expansiveness and solidifying property, steel slag having lost expansiveness, blast furnace slag, ferroalloy slag, granulated slag, copper smelting slag, red mud, fly ash, refuse incinerated ash, glass crushed material , Industrial waste such as waste gypsum and concrete waste, building materials such as gypsum, quick lime, cement, crushed stone, earth and sand, clay, etc. The method for burying a ready-made pile according to claim 4 or 5, characterized in that the expandability and the solidification property of the slag possessed can be utilized. 7. A prefabricated pile is built in the excavation hole excavated by an auger screw having a spiral band fixed at an appropriate position on the outer peripheral portion of a general-purpose auger screw blade when the excavation hole is formed. Claims 1, 2, 3, 4,
The method for burying ready-made piles according to 5 or 6. 8. An apparatus used in the method for burying a prefabricated pile according to claim 1, 2, 3, 4, 5, 6 or 7, wherein a stirring blade is obliquely provided on the outer peripheral surface of the tubular casing body fitted onto the prefabricated pile. An apparatus used for burying prefabricated piles, characterized in that it comprises a compacting casing projecting on the outer peripheral surface of the distal end portion of the cylindrical casing body and projecting a pressing plate inclined in the same direction as the stirring blade.