JPH1193161A - C-shaped pile and its driving method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a continuous impermeable layer by inserting vertical reinforcing bars in the hole of normal ribs, and forming a C-shaped pile having an annular structure through the fixture of a plurality of horizontal reinforcing bars, and then placing concrete after the insertion into the pile hole excavated. SOLUTION: The C-shaped pile 2 is made into an annular structure, and provided with a vertically elongated hole 25. The horizontal reinforcing bars 21 are formed in parallel with each other, and vertical reinforcing bars 22 are inserted in the hole of normal ribs 24 to thereby be fixed in a location being face-to-face mutually. A pile driving table is installed horizontally, and a hole expansion auger is inserted in a pile-configured 26 of the C-shaped pile 2 for excavation. At this time, the C-shaped pile 2 comes downward for protecting the wall hole. After coming down to the constant depth, low slamp concrete is placed therein to subsequently be compacted by a hammer before closing an opening of the pile bottom. After that, pile driving is implemented successively such that the wall part of the following C-shaped pile clogs the vertical elongated hole 25. Finally, concrete is placed in the space 26. In this way, the foundation of a construction having a large cross-section is formed by a pile with a small cross-section, thereby facilitating the work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a C-shaped pile and a pile driving method for constructing an underground structure, and is particularly used for constructing a ground, a continuous underground wall, a deadline, a large abutment, and the like. It relates to the pile driving method.

[0002]

2. Description of the Related Art When the above-mentioned structure is constructed by a traditional method, the following problems may occur. 1. As the size of the structure increases, the construction equipment also tends to increase in size, so it is not easy to work in a narrow space, and moreover, it causes greater vibration or noise. 2. The larger the structure, the larger the required volume of excavation, the longer the required time, and the more severe the surface subsidence, causing water leakage in the permeable layer, leading to collapse of the hole. The surface is washed away by the underflow layer, and the pile is broken. 3. It is difficult to construct geological structures such as conglomerate and rock layers. 4. Disposal of waste soil with high water content is complicated. 5. Joints between piles often leak water and sand. 6. The mud settling at the bottom of the pile cannot be treated reliably. 7. It is difficult to maintain the quality and strength of concrete due to the flow of concrete into water.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a C-shaped pile and a pile driving method for solving the above-mentioned problem. And can minimize noise and vibration, can be applied to flexible geological or permeable or underground formations, can be applied to conglomerate or rock formations or existing concrete structures, and can be constructed on excavated waste soil Without contaminating, it is possible to reliably form a continuous impervious layer wall between piles and to maintain the quality of concrete in the pillar space, and to secure construction accuracy or construction speed,
It is still another object of the present invention to provide a C-shaped pile capable of realizing a large design strength with a thin wall and a pile driving method thereof.

[0004]

The C-shaped pile according to the present invention has a C-shaped pile.
A column-shaped space located in the shape-shaped pile, a longitudinal slot extending in the longitudinal direction of the C-shaped pile, a top opening opened at the top end of the C-shaped pile and penetrating the column-shaped space, Open at the bottom and includes a columnar space and a bottom opening therethrough.

[0005] The C-shaped pile of the present invention includes concrete and a framework substantially wrapped in concrete, and the framework further comprises: (A) a plurality of C-shaped positioning ribs each having a plurality of holes; (B) a plurality of vertical reinforcing bars fitted into the holes of the C-shaped positioning ribs and fixed at corresponding positions; (C) a plurality of C-shaped horizontal reinforcing bars fixed to the vertical reinforcing bars; D) Both the C-shaped end plates fixed to both ends of the longitudinal reinforcing bar may be included.

[0006] The C-shaped pile of the present invention may further have an outer wall formed of two straight portions or a tubular net provided outside the pile.

According to the pile driving method of the present invention, the step of precasting the C-shaped pile, the step of excavating the pile hole, the step of inserting the C-shaped pile into the pile hole, and the above-described steps further increase the number of C-shaped piles. And a step of pouring concrete into the columnar space defined by the C-shaped pile to form a continuous impermeable underground wall, and the like.

In the pile driving method used according to the soil quality at the construction site, the excavation process is divided into a dry excavation method and a wet excavation method. When using the dry excavation method where the soil at the construction site is solid and there is no risk of collapse, if the soil at the construction site can be flexibly collapsed while the stable liquid is not injected into the space where the C-shaped pile is separated In order to maintain the hole wall, a wet drilling method in which a stabilizing solution is injected at appropriate times will be used.

After the C-shaped pile is driven into a certain depth,
Immediately pour the low slump concrete into the pile bottom,
The bottom opening of the C-shaped pile is closed by compacting with a hammer.

However, adjacent C-shaped piles are simultaneously driven into the ground. After all the C-shaped piles have been implanted, concrete is poured into the column-shaped space of each C-shaped pile, thereby forming a continuous and completely impermeable C-shaped pile underground wall. Form.

An embodiment of the pile driving method according to the present invention includes the following steps.

A step of pre-casting the C-shaped pile;
A step of inserting a C-shaped pile into an auger auger, a step of excavating and discharging soil while rotating the auger auger, a step of pressing a C-shaped pile and planting it in the ground, A step of closing the pile bottom by tightening and tightening, a step of implanting more C-shaped piles in the ground floor by the above-mentioned steps to make them close together, and pouring concrete into the C-shaped piles implanted in the ground floor and bonding them together. A series of underground walls that are completely impermeable.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

<< Structure of Pile >> FIGS. 1 and 2 show a C-shaped pile according to a first embodiment of the present invention. FIG. 1 shows a C-shaped pile obtained by casting a skeleton (not shown) and concrete. The skeleton includes a plurality of horizontal reinforcing bars 21, a plurality of vertical reinforcing bars 22, end plates 23, and positioning ribs 24. The horizontal reinforcing bars 21 are formed in parallel with each other, and the vertical reinforcing bars 22 are inserted into a plurality of holes of the stereotactic ribs 24, and are fixed at positions where the vertical reinforcing bars 22 face each other. End plate 23
Is fixed to the end of the longitudinal reinforcing bar 22. Lateral reinforcing bar 2
1, the end plate 23, the positioning ribs 24 and the like are all formed in a C shape, so that they can be formed in a C shape pile. The formed C-shaped pile 2 has a tubular structure, and a longitudinal slot 2 extending from one end to the other end of the tubular structure.
5, and the columnar space 26 is separated by the inner wall of the C-shaped pile 2. Both ends of the C-shaped pile 2 are open, and an arc-shaped outer wall (not shown) is provided.

FIGS. 3 and 4 show a C-shaped pile 3 according to a second embodiment of the present invention. The C-shaped pile 3 is similar to the C-shaped pile 2 described above. However, more C-shaped piles 3 are installed on both parallel vertical walls 31 on both sides of the longitudinal slot 25 than the C-shaped piles 2. When a plurality of C-shaped piles 3 are planted in a row in the ground, the straight walls 31 of these C-shaped piles 3 can have a large flat piece structure. Even if the structures are different, the manufacturing method of the C-shaped pile 3 and the C-shaped pile 2 is the same, and therefore, the details are omitted.

FIGS. 5 and 6 show a pile 4 according to a third embodiment of the present invention. The pile 4 includes a C-shaped pile 2 and a tubular net 40.

In manufacturing the tubular net 40, first, a plurality of vertical reinforcing bars 41 are added to the horizontal reinforcing bars 21, and a plurality of auxiliary positioning ribs 43 are further mounted to the positioning ribs 24.
By inserting a plurality of longitudinal reinforcing bars 42 into a plurality of holes (not shown) limited to the auxiliary positioning ribs 43, the auxiliary lateral reinforcing bars 41, the vertical reinforcing bars 42, and the auxiliary positioning ribs 43 are provided.
Are fixed to each other. The auxiliary horizontal reinforcing bar 41 and the vertical reinforcing bar 22 are tied with a wire or connected by welding. Then, the auxiliary positioning rib 43 is changed to the positioning rib 2 by welding.
4 can be fixedly or integrally formed.

Although not shown, as another embodiment, instead of connecting to the vertical reinforcing bar 22, an auxiliary horizontal reinforcing bar 41 is connected to the horizontal reinforcing bar 21, and further, the auxiliary horizontal reinforcing bar 41 is connected to the vertical reinforcing bar 41. The auxiliary horizontal reinforcing bar 41 and the vertical reinforcing bar 22 can also be integrally formed by binding the directional reinforcing bar 22 with a wire or connecting them by welding.

The above-mentioned auxiliary lateral reinforcing bar 41 and auxiliary vertical reinforcing bar 43 are both C-shaped, and the outer dimensions thereof are slightly smaller than the inner dimensions of the C-shaped pile 2. The net 40 (knitted from the auxiliary lateral reinforcing bar 41, the auxiliary vertical reinforcing bar 42, or the auxiliary stereotactic rib 43) is put into the columnar space 26 where the C-shaped pile 2 of the pile 4 is separated, and thus configured. The structures that are
Can resist pulling force.

FIGS. 7 and 8 show a pile 5 according to a fourth embodiment of the present invention. The pile 5 includes a C-shaped pile 3 and a tubular net 40. Since the pile 5 and the pile 4 are similar except that the C-shaped pile 3 is used instead of the C-shaped pile 2, details thereof are omitted.

Although the use of several pile embodiments described with reference to FIGS. 1 to 4 has been described, the invention is not limited to these embodiments, but may be applied to columnar spaces and longitudinal slots. The pile of the present invention can be used as long as it can accommodate the hole auger and its excavating blade (as described later). When viewed from the cross-sectional view, the C-shape refers to the formation of a circular inner circle (a cylindrical inner wall) and a notch (a vertically long hole) in the pile, and how the outer wall of the C-shaped pile is formed. It can be applied in any form.

<< Structure of Hole Auger >> FIGS. 9 and 10 show a dumping bowl type hole auger 6 used in the present invention. The dumping bin-type auger 6 includes a dumping bin 60, a top lid 62 and a bottom lid 63. Since the outer diameter of the dumping bin 60 is smaller than the inner diameter of the C-shaped pile, it is possible to move to the column-shaped space where the C-shape (any of 2 to 5) is limited. The top lid 62 and the bottom lid 63 close the upper and lower ends of the respective dump bins 60. The connection end 61 protrudes from the center of the top lid 62 and can be connected to a telescopic auger post (not shown). The drill 66 extends downward from the center of the bottom lid 63. An elongated hole 69 is formed in the bottom cover 63, and a plurality of teeth 64 are provided on the bottom surface of the bottom cover 63. A special feature of this pit-type auger is that an elongated hole 68 is formed in the side wall surface. The excavation blade 67 is extended obliquely from the side wall of the dumping tub part, and the wall body of the pile hole can be excavated by fitting a plurality of teeth 65 into the excavation blade 67. The length from the axis of the dump bin 60 to the free end of the excavating blade 67 corresponds to half the outer diameter of the pile.

FIG. 11 shows a screw blade type hole auger 7 used in the present invention. The upper end of the hole auger 7 is connected as a connection end 71 to a telescopic auger post (not shown). The hole auger 7 has a shaft 72 and a screw blade 73 around the shaft 72.
A special feature of the screw blade type hole auger 7 is that a cutting blade 76 extends from the shaft 72. Then, the plurality of teeth 75 are
And is used for excavating the wall of the pile hole. Shaft 72
The length from the center of the stake to the free end of the digging blade 76 is equal to one-half the outer diameter of the pile.

<< Structure of Pile Driver >> FIGS. 12 to 14 show the pile driver 8. The pile driver 8 is used when the C-shaped pile is implanted to the ground at a constant speed while maintaining the vertical state of the C-shaped pile. The pile driving table 8 includes an upper plate 81 and a lower plate 82. Each of the upper plate 81 and the lower plate 82 has a hole (not shown) for penetrating the pile.

Hydraulic cylinders 83 are provided at each corner of the lower platen 82. By operating these hydraulic cylinders 83, the position of the pile driving table 8 can be adjusted horizontally.

The upper plate 81 has four hydraulic cylinders 84. One end of each hydraulic cylinder 84 is connected to the upper plate 81, and the other end is connected to the lower plate 82. By adjusting these hydraulic cylinders 84, the upper plate 81 can be moved on the lower plate 82 and aligned. A guide frame 86 is erected on the upper board 81, and as soon as the pile driving table 8 is adjusted to be horizontal, the guide frame 86 can be made vertical at the same time. By aligning the inner wall of the guide frame 86 with the outer wall of the pile, the guide frame 86 allows the pile to be vertical when the pile is inserted into the guide frame 86. The guide frame 86 has a length sufficient to secure the pile vertically to the bottom of the ground. Two long holes 88 are further provided on the side wall surface of the guide frame 86. Since the inner surface of the guide frame 86 must always be aligned with the surface of the pile, there must be a guide frame that can accommodate different types or different sized piles.

Each hydraulic cylinder 85 is provided on both sides of the guide frame 86 to constitute a pile adjusting device. One end of the hydraulic cylinder 85 is connected to the guide frame 86,
The other end can be connected to a stake inserted into the stake hole. Hydraulic cylinder 8
In order to connect the 5 to the stake, a pin (not shown) must be passed through an eye or slot 88 provided in the hydraulic cylinder 85 and a hole (not shown) in the C-shaped stake. Then, the vertical movement of the pile can be controlled by the expansion and contraction of the hydraulic cylinders 85, and the path that the hydraulic cylinders 85 move when extended can correspond to the elongated holes 88.

<< Pile driving operation >> Hereinafter, FIGS. 15 to 1
The pile driving operation will be described with reference to FIG. First,
The pile driving table 8 is appropriately positioned, and the hydraulic cylinder 83 is adjusted so that the pile driving table 8 is installed horizontally. The pile driving table 8 is used for sandwiching the pile, and when the pile driving table 8 is horizontal, the pile can be positioned vertically.

Then, the auger (6 or 7) is inserted into the columnar space 26 of the stake (in any case of 2 to 5).
This stake limits the position of the auger auger and guides the advancing direction. Auger (6 or 7)
The free end of the excavating blade 67 or 76 is moved along the vertically long hole 25 when the piece is located in the columnar space 26. The corresponding position of the hole auger and the pile is that a part of the auger is on the pile
It is on the underside of the pile for the excavation blade. This allows the excavation blade to rotate and excavate the soil.

When excavating to a certain depth with the auger auger, the pile can sink down accordingly to protect the hole wall and continue to excavate further. The hole wall near the vertically long hole 25 is not supported, but the soil just excavated
It has its own self-sustaining time, has an arching effect on the hole wall, and since the excavation and pile driving work is performed continuously, the construction time required for each pile is It is not too long, and there is no danger of collapse of the hole wall even when excavating general geology. Therefore, under normal circumstances, it is sufficient to simply perform a dry excavation without adding a stabilizing solution. When working on a special soft ground, if there is a risk of collapse of the hole wall, pour the pile after injecting a stabilizing solution in advance so that the hole wall does not collapse.

The connection of the piles is as follows. Due to the limited length of each pile, the pile does not reach the planned depth unless the piles are connected during the driving process. The connection means of the pile is such that the later pile is connected to the guide frame 86 of the pile driving table 8.
After the upper pile and the lower pile are aligned (centered) by the guide of the guide frame 86, the two piles are connected by welding. Since both the inner wall and the outer wall of the pile can be welded through the vertically long hole 25, sufficient strength can be provided in the connection operation of the pile.

Hereinafter, the operation of sealing the bottom of the C-shaped pile will be described with reference to FIG. As described above, when the C-shaped pile is submerged to a certain depth below the ground, work for closing the bottom of the C-shaped pile is immediately performed. When the dry pile driving method is used, low slump concrete is put into the pile bottom, then the low slump concrete is compacted with a hammer, driven out, vibrated at the bottom of the pile and collapsed to form debris and a spherical pile tip 9. Becomes The spherical pile tip 9 seals the opening of the pile bottom, and the load stress on the pile bottom can be improved as the load area increases.

When the wet pile driving method is used, a large amount of the stabilizing liquid is poured into the pile bottom, and the low slump concrete is made of PE to prevent the low slump concrete from being diluted with the stabilizing liquid and not being compacted. By putting it in a bag and putting the low slump concrete in the bag into the pile bottom, it is prevented from being scattered by the stabilizing liquid. By hitting the packed concrete with a hammer, the debris dispersed by the vibration is pressed outward to form a spherical pile tip 9.

After one pile is driven into the ground to form a spherical tip, the other piles are driven into the ground by the above-described steps. The wall of the following pile can be formed by plugging the longitudinal hole of the previous pile, and surrounding the structure as shown in FIG. 18 by driving a plurality of C-shaped piles 2 in order. . In the structure shown in FIG.
The first pile is placed in the upper right corner, and the other piles must be driven into the ground in a clockwise order, with the last few piles in close contact with the first several piles .

Next, a method of flowing concrete into the columnar space 26 limited to the C-shaped pile will be described. All C
Immediately after the completion of the implantation work of the shaped pile, the soil and sand adhered to the inner wall of the shaped C pile are washed with high pressure air and water, and then the water accumulated in the columnar space limited to the shaped C pile is pulled out and dried. At this time, inspect the bottom of the pile by visual inspection,
Investigate the contact between the pile and the pile. Subsequently, the concrete strength can be easily controlled by injecting the concrete into the columnar space 26 divided into the C-shaped piles. The product can also be a completely continuous underground wall.

When the wet pile driving method (to protect the hole wall with the stabilizing liquid) is performed, after all the C-shaped pile driving operations are completed, the sediment remaining on the C-shaped inner wall is removed using high-pressure air. After the stable liquid in the columnar space 26 is sucked and dried, concrete is poured into the columnar space 26. If the stable liquid of the C-shaped pile cannot be sucked and dried due to the constant inflow of groundwater into the C-shaped pile, the stable liquid is replaced with water, and concrete is poured into the column-shaped space 26 in the water by the close-pipe method. .

When the structure has to withstand a great abduction force, the non-C-shaped pile must be used except for the first use of the C-shaped pile 2. 4
Can be configured. However, the corners of the structure must always be composed of the modified piles 4. In the modified method, the C-shaped pile 2 is maintained at the position shown in FIG. 6, and the tubular net 40 can be moved by 90 ° from the position shown in FIG.

FIG. 19 shows a structure including a plurality of piles 3 and piles 2. Piles 2 will be used in the corners of the structure and stakes 3 will be used in other parts of the structure.

When the structure shown in FIG. 19 has to withstand a strong stretching force, the piles 4 and 5 are used instead of the C-shaped piles 2 and 3 respectively.

Over the years, field work or the arrangement of precasting piles has not been successful because of the inability to control construction accuracy. If the slope of the pile or the gap between the piles is too large and the arrangement of the piles is not uniform, the subsequent excavation work will be affected unless the ground or the water is stopped. On the other hand, the pile driving method of the present invention can control the construction accuracy effectively and reliably. The control of the accuracy is performed as follows.

First, the pile driving table 8 is erected and the lower plate 82
The hydraulic cylinder 83 is adjusted so that is in a horizontal state.
By operating the hydraulic cylinder 84 to move the upper plate 81, the center of the guide frame 86 is positioned at the center of the ground pile, and then the upper plate 81 and the lower plate 82 are immediately tightened. At this time, since the guide frame 86 is vertical and is positioned at the center of the pile on the ground, the center line of the C-shaped pile is vertical and is aligned with the center of the pile on the ground when the C-shaped pile is installed on the guide frame 86. I have. By operating the hydraulic cylinder 85, the C-shaped pile can be adjusted to an appropriate altitude.

Next, the perforated auger is placed in the columnar space 26. At this time, the tip of the C-shaped pile extends 30 to 50 cm. In addition, the soil is excavated and discharged by rotating the hole auger. At this time, since the augmented auger is located at the center of the C-shaped pile, its movement is restricted by the C-shaped pile, and the forward direction of the augmented auger corresponds to the central axis direction of the C-shaped pile. . Therefore, it can be seen that the direction of the pile hole is the center line direction of the C-shaped pile, and the diameter of the pile hole is the outer diameter of the C-shaped pile. Due to the sedimentation speed of the C-shaped pile set in accordance with the excavation or discharge speed of the soil, the hole auger is kept at a position of 30 to 50 cm from the tip of the C-shaped pile. The formed pile hole also matches the C-shaped pile, and the C-shaped pile is in a natural vertical state.

The control over the accuracy is, in a nutshell, that the vertical or horizontal state of the C-shaped pile is maintained by the pile driver 8 on the surface of the ground, and that the C-shaped pile at the bottom of the ground adjusts the exact direction of the auger auger. Can be kept. As long as the hole auger is kept in the correct direction, the exact position of the pile hole can be secured, and if the precise position of the pile hole can be secured, the precise position of the C-shaped pile can be further secured. Can be.

Even if the above-mentioned pile is inclined,
With the aid of the present invention, errors can be corrected as described below so that the gap between the piles is not excessive.

If adjacent piles are not parallel, they will separate or intersect at the bottom. When separated from each other, there is a gap between the piles. When adjacent piles are separated, a columnar space 2 is used by the unique method used in the method of the present invention.
By injecting concrete into 6, the above-mentioned effect can be exerted by filling the gap between the piles with the concrete to be poured on site, and independent piles can be formed into an integral structure. And when you meet,
The pile that was driven first occupies the position of the later pile,
By using an existing excavating machine in accordance with the hole auger of the present invention, the previously driven pile can be cut, and the subsequently driven pile can be lowered to the ground without hindrance.

[0045]

The C-shaped pile and the method of driving the same according to the present invention have the following advantages by successfully combining a pile driver, a hole auger and a C-shaped pile. 1. When constructing the foundation of a structure with a large cross section (for example, an abutment), the pile driving method of the present invention forms a continuous wall by combining a plurality of small cross section piles and forms the foundation of a structure with a large cross section. it can. For this reason, the conventional technique always requires the use of a large machine, whereas the pile driving method of the present invention only uses a small machine, which makes it easy to work in a small space and minimizes noise and vibration. Can be minimized. 2. In pile driving, one hole can be stored for each excavation, and in excavation, the hole wall can be protected by the pile so that the surface does not collapse. Alternatively, it can be applied to a subsurface layer. 3. By using a unique drilling auger and protecting the hole walls with piles suitable for general drilling machinery, it is possible to excavate conglomerate layers or rock layers or existing concrete structures. 4. The excavated waste soil is directly lifted from the pile hole and transported from the site by truck, so the site is not polluted. 5. In the unique molding and construction process of the pile of the present invention, after the pile driving operation is completed, the pile inner wall and the next pile outer wall surround the pillar space. Therefore, by injecting concrete into the column space of the pile, the concrete can be in close contact with the pile to form a continuous impermeable layer wall. 6. Since the pile is a pre-casting product, the quality of the pile can be controlled consistently. By discharging mud in the pillar space before pouring concrete into the pillar space, the quality of the concrete in the pillar space can be maintained. 7. It is possible to secure construction accuracy or speed by fixing the position of the pile with the pile driver and maintaining the vertical driving of the pile. 8. The vertical opening of the stake allows the stake to easily enter the confined column space, and also allows the auger and cutting blade to be joined in a fixed manner, and the stake wall By excavating the part of the earth body, the conventional link or bolt connection method can avoid the weak point in connection, that is, the disadvantage that the operation cannot be performed reliably and the excavation property cannot be improved. , It can break through the earth body and the like of the protective tube wall. 9. After each pile is driven down to the ground floor, by building a spherical pile tip at the bottom of the pile, the soil can be driven away and eliminated, and the load capacity of the pile bottom can be improved. 10. In the piles that are subsequently constructed, the tubular nets protruding outside the piles fall vertically and enter the columnar space of columns already implanted in the ground, so that adjacent piles are connected horizontally by steel bars. Therefore, after injecting concrete into the columnar space, a continuous wall having water impermeability and high tensile strength can be formed. 11. Because the precasting pile is a structure, its strength is high and the quality can be kept constant, thereby achieving the design strength with a thin wall. 12. There is no rebar work at the construction site, and there is no need to install a rebar cage assembling site or a rebar cage hanging device, thus avoiding the complexity of the work.

The scope of the present invention is not limited to the above-described several embodiments, but is according to the claims of the present application, and may be modified or changed without departing from the scope and spirit of the present invention. Is also included.

[Brief description of the drawings]

FIG. 1 is a side view of a C-shaped pile according to a first embodiment of the present invention, showing a state in which a portion of concrete has been peeled to expose a skeleton.

FIG. 2 is a sectional view of the C-shaped pile shown in FIG. 1;

FIG. 3 is a side view of a C-shaped pile according to a second embodiment of the present invention.

FIG. 4 is a sectional view of the C-shaped pile shown in FIG. 3;

FIG. 5 is a side view of a C-shaped pile according to a third embodiment of the present invention.

6 is a cross-sectional view of the C-shaped pile taken along line 6-6 in FIG.

FIG. 7 is a side view of a C-shaped pile according to a fourth embodiment of the present invention.

8 is a cross-sectional view of the C-shaped pile taken along line 8-8 in FIG. 7;

FIG. 9 is a side view of a dumping pit type auger used in the present invention.

FIG. 10 is a top view of the hole auger of FIG. 9;

FIG. 11 is a side view of a screw blade type hole auger used in the present invention.

FIG. 12 is a top view of a pile driving table used in the present invention.

FIG. 13 is a side view as seen from the direction of arrow A in FIG.

FIG. 14 is a side view as seen from the direction of arrow B in FIG.

FIG. 15 is a top view of the pile driving table during the pile driving operation of the present invention.

FIG. 16 is a side view as seen from the direction of arrow C in FIG.

FIG. 17 is a side view as seen from the direction of arrow D in FIG. 15;

FIG. 18 is a top view of a structure surrounded by a plurality of C-shaped piles of FIGS. 1 and 2;

19 is a top view of a structure surrounded by a plurality of C-shaped piles of FIGS. 3 and 4. FIG.

FIG. 20 is a top view of a structure surrounded by a plurality of C-shaped piles.

[Explanation of symbols]

 2, 3, 4, 5 Piles 21 Lateral reinforcing bar 22 Vertical reinforcing bar 23 End plate 24 Orientation rib 25 Slot 26 Column-shaped space 31 Vertical wall 40 Tubular net 41 Lateral reinforcing bar 42 Vertical reinforcing bar 43 Orientation rib 6 Trough type expansion Hole auger 60 Drain tub 61 Connection part 62 Top lid 63 Bottom lid 7 Blade type hole auger 71 Connection end 72 Shaft 73 Screw blade 75 Teeth 76 Drilling blade 8 Piling table 81 Upper plate 82 Lower plate 83,84,85 Hydraulic cylinder 86 Guide frame 88 Slot 9 Tip of pile

Claims (8)

[Claims] 1. A columnar space located on a C-shaped pile
A longitudinal slot (25) extending in the longitudinal direction of the C-shaped pile, a top opening that is opened at the top end of the C-shaped pile, and penetrates the columnar space, and is opened at the bottom of the C-shaped pile, A C-shaped pile comprising a columnar space and a bottom opening therethrough. 2. The C-shaped pile according to claim 1, comprising a concrete and a skeleton substantially enclosed by concrete, wherein said skeleton further comprises: (A) a plurality of C-shaped localization ribs each having a plurality of holes. (24), (B) a plurality of longitudinal reinforcing bars (22) fitted into holes of the C-shaped localization ribs and fixed at corresponding positions, and (C) a plurality of longitudinal reinforcing bars fixed to the longitudinal reinforcing bars. A C-shaped pile comprising a C-shaped lateral reinforcing bar (21) and (D) both C-shaped end plates (23) fixed to both ends of a vertical reinforcing bar. 3. The C-shaped pile according to claim 1, wherein the outer wall of the C-shaped pile comprises two straight portions. 4. The C-shaped pile according to claim 1, wherein the outer side of the C-shaped pile has a tubular net. 5. A step of: (A) setting a sample after leveling and surveying; (B) providing a pile driver and horizontally adjusting; and (C) providing a C-shaped pile. A step of opening a columnar space, a longitudinal slot, a top opening and a bottom opening in a shape pile, and (D) a step of installing a C shape pile on a pile driver,
(E) the step of providing a hole auger and opening a pile hole by rotating it; (F) the step of guiding a C-shaped pile to the pile hole using a pile driver; and (G) the bottom of a C-shaped pile. (H) repeating the steps from (B) to (G) and driving the large number of C-shaped piles into the ground until it becomes a wall body; and (I) the large number of C-shaped piles. A pile driving method characterized by a process of pouring concrete into the columnar space of a shaped pile. 6. The pile driving method according to claim 5, wherein the pile driving platform comprises: (A) an upper plate (81) including one hole through which the pile is penetrated; A lower plate (82) including a single hole, and (C) a lower plate adjusting device (83) that supports the lower plate and leveles the lower plate by operating the adjusting device of the lower plate; (D) An upper plate adjusting device (8) provided between the upper plate and the lower plate to adjust their corresponding positions.
4), (E) a guide frame (86) that is erected on the upper plate, extends from a hole in the upper plate and closely adheres to the pile, and (F) is provided on the upper plate, and the pile is provided by operation. A pile driving method comprising a pile adjusting device for raising and lowering. 7. The pile driving method according to claim 5, wherein the hole-expanding auger moves to (A) a columnar space (26), and a slot (68) is opened on the inner surface of the wall. Part (60),
(B) an excavating blade (67) which projects obliquely from the lateral side of the dumping tub section and which is installed in the columnar space of the C-shaped pile, the free end of which moves into the longitudinal slot of the pile. (C) a plurality of teeth (65) installed on the excavating blade, (D) a top cover (62) for closing the upper end of the dumping bin, (E) protruding from the center of the top cover, A connection end (61) connected to the auger post for receiving a torsional force; (F) a bottom lid (63) having a closed lower end of the dumping tub portion and having a long hole (69);
(H) a drill extending downward from the center of the bottom lid;
A pile driving method, comprising a trough-shaped widening auger including a plurality of teeth (64) provided on the bottom surface of the bottom lid. 8. The pile driving method according to claim 5, wherein the hole expanding auger comprises: (A) a shaft (72); (B) a screw blade (73) extending around the shaft; C) a plurality of teeth (74) fitted into the screw blade, (D) a drilling blade (76) extending from the shaft, and (E) a wall surface of the pile hole fitted into the drilling blade. Multiple teeth used to excavate (75)
A pile driving method characterized by having a screw-apertured auger including the following.