JP2005009240A - Method for installing soil hardened matter on-site-manufactured pile and prefabricated pile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for installing a soil hardened matter on-site-manufactured pile and a prefabricated pipe capable of executing installation with hardly generating general surplus soil and surplus soil as an industrial waste at a low construction cost. <P>SOLUTION: A pile pit 6 is excavated by an auger screw 5 while excavated soil 1 in a quantity corresponding to the injection quantity of a hardener 2 is rubbed into the pit wall of the pile pit 6 by a large diameter section 55 having approximately the same diameter as an excavating head 51 installed to the upper section of the auger screw 5. The hardener 2 is injected to the excavated soil 1 in the pile pit 6, the hardener 2 and the excavated soil 1 are mixed and agitated by repeatedly reciprocating the auger screw 5 while being forward and reversely turned, the auger screw 5 is pulled up and the prefabricated pile 4 is built into the pile pit 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a pile of soil-cured material on site and a method for constructing a ready-made pile, and in particular, a soil-cured material site-created pile that is constructed with little generation of general residual soil and industrial waste as well as low construction costs. And the construction method of ready-made piles.
[0002]
[Prior art]
Conventionally, for example, when using a ready-made pile such as a concrete pile as a foundation pile of a building, a method of pre-boring with an auger screw to create a pile hole, and building the ready-made pile into this pile hole and filling cement milk Is taken.
Also, when building ready-made piles in the pile hole, by lifting up the auger screw and injecting a hardening material such as cement milk from the tip of the drilling head, the excavated soil in the pile hole is made as soil cement, By inserting a ready-made pile into the soil cement, the periphery of the ready-made pile is fixed with a curable material.
[0003]
[Problems to be solved by the invention]
However, since the above-mentioned conventional ready-made pile construction method inserts a ready-made pile into a soil cement kneaded with hardened material such as cement milk and excavated soil, it can inject hardened material such as cement milk, When inserting the soil, the soil cement overflows from the pile hole to the ground to become residual soil (industrial waste), and there is a problem that a large cost is required to dispose of it.
In addition, this problem was the same also in the case of the soil cement pile which does not insert a ready-made pile.
[0004]
In view of the problems of the above-mentioned conventional methods for constructing ready-made piles, the present invention provides a soil-cured material site-built pile that can be constructed with little generation of general residual soil and residual soil that is industrial waste, and at low construction costs. It aims at providing the construction method of a ready-made pile.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the method of constructing a pile of soil cured material according to the present invention is a method of constructing a pile of soil cured material in-situ pile in which a hardened material is injected into excavated soil to form a pile. And excavating the excavated soil in an amount corresponding to the amount of hardened material injected into the hole wall of the pile hole with the large diameter part provided at the upper part of the auger screw. The hardened material is poured into the excavated soil, and the auger screw is reciprocally moved while being rotated forward and backward to perform mixing and stirring, and the auger screw is pulled up.
[0006]
Moreover, in order to achieve the same purpose, the method for constructing a ready-made pile according to the present invention is to excavate a pile hole with an auger screw in a method for constructing a ready-made pile in which soil pile in which hardened material is injected into excavated soil is built. Along with the large diameter part of the same diameter as the excavation head, provided at the upper part of the auger screw, rubbing the amount of excavated soil according to the injection amount of the hardener and the volume of the ready-made pile into the hole wall of the pile hole, Inject hardened material into the excavated soil in the pile hole, repeat the reciprocating movement while rotating the auger screw forward and backward, mix and agitate, pull up the auger screw, and then build the ready-made pile in the pile hole It is characterized by.
[0007]
The method of constructing this soil hardened material site pile and ready-made pile is to drill the pile hole with an auger screw, and to inject the amount of the hardened material by the large diameter part with the same diameter as the excavation head provided at the upper part of the auger screw. In addition, the amount of excavated soil according to the volume of the piles and the ready-made piles is rubbed into the hole walls of the pile holes, so that the generation of general residual soil is reduced as much as possible, and the overflow of soil cement from the pile holes is prevented. In addition to significantly reducing the cost of processing industrial waste by reducing the generation of residual soil, it is possible to create a soil cement with stable quality without using extra hardener, and to mix and stir Because it is short, construction efficiency can be increased, construction costs can be reduced, and the ground around the hole wall near the head of the pile can be pressed and consolidated, increasing the ground reaction force and increasing the horizontal strength of the pile. it can
[0008]
Moreover, in the construction method of the soil hardened material field-constructed pile and the ready-made pile of the present invention, an enlarged large-diameter portion larger than the excavation head is provided on the upper portion of the large-diameter portion, and the enlarged large-diameter portion and the large-diameter portion are provided. The amount of excavated soil according to the amount of the hardener injected and the volume of the ready-made pile can be rubbed into the hole wall of the pile hole.
[0009]
As a result, in the excavation process, the area near the pile head is formed into a large diameter for economical construction, and the soft ground near the pile head is improved, and the horizontal resistance of the pile is reduced by the bearing effect of this ground improved portion. Can be increased. Since the pile diameter can be designed with a size suitable for the vertical support force required to support the superstructure, it is possible to design with a balance between vertical and horizontal support force.
[0010]
Moreover, the mixture of the slag powder particle | grains which have expansion | swelling and solidification property containing expansion | swelling and solidification components, such as free CaO and free MgO, and cement can be used for the said hardening | curing material.
Here, as a distinction between the powder and the granule, the boundary between the particle and the powder is set to an adhesion equilibrium particle size of 30 to 50 μm in which the particle's own weight and adhesion force are equal.
And the steelmaking slag (converter slag and / or electric furnace slag (oxidized slag and / or reduced slag) is said to the slag granular material which has the expansibility and the solidification property, and aging treatment is especially performed here. Steelmaking slag that does not lose its expansibility, such as steelmaking slag whose expansibility is adjusted by partially performing an aging treatment in addition to no steelmaking slag.), One or two types of waste incineration slag and sludge slag A mixture of the above can be used.
Furthermore, steel slag, blast furnace slag, ferroalloy slag, granulated slag, copper smelting slag, red mud, fly ash, garbage incineration ash, and glass crushing that have lost expansibility to the slag powder having expandability and solidification Materials, concrete waste, industrial waste such as waste gypsum, gypsum, quicklime, crushed stone and other building materials, man-made materials, mineral powders, or a mixture of one or more, and has expandability and solidification What can utilize the expansibility and solidification property of a slag granular material can be used.
[0011]
As a result, the slag powder having expandability and solidification absorbs water, expands and solidifies, so that the ground around the pile can be easily, statically and surely compacted. In the case of the pile construction method, the soil hardened material layer and the ready-made pile are more closely attached, and thereby the expansion force can increase the support capacity of the pile and the amount of cement used can be reduced. .
Moreover, effective use of steelmaking slag etc. which are industrial waste can be aimed at.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the embodiment of the construction method of the soil hardened material field creation pile and ready-made pile of this invention is described based on drawing.
[0013]
1 to 2 show a first embodiment of a method for constructing a ready-made pile according to the present invention.
This prefabricated pile construction method is such that prefabricated piles 4 such as PC piles, PHC piles, concrete joint piles, steel pipe piles, etc. are built in the soil cement 3 in which the hardened material 2 is injected into the excavated soil 1. It is.
In this case, the construction method of this ready-made pile is that the pile hole 6 is excavated by the auger screw 5 and the hardened material 2 is formed by the large-diameter portion 55 having the same diameter as the excavation head 51 provided on the upper portion of the auger screw 5. The excavated soil 1 in an amount corresponding to the injection amount is rubbed into the hole wall of the pile hole 6, and then the hardened material 2 is injected into the excavated soil 1 in the pile hole 6, and the auger screw 5 is rotated repeatedly forward and backward. After mixing and stirring by reciprocating, the auger screw 5 is pulled up, and then the ready-made pile 4 is built in the pile hole 6.
[0014]
In this case, as the hardener 2, in addition to cement (ordinary Portland cement, mixed cement (blast furnace cement, fly ash cement)), a mixture of slag particles and cement having expandability and solidification property may be used. it can.
And the steelmaking slag (converter slag and / or electric furnace slag (oxidized slag and / or reduced slag) is referred to as the slag powder having expandability and solidification, and in particular, no aging treatment is performed here. In addition to steelmaking slag, this refers to steelmaking slag that has not lost its expansibility, such as steelmaking slag whose expansibility has been adjusted by partially performing an aging treatment.), One or more of waste incineration slag and sludge slag Can be used.
In addition, steel slag, blast furnace slag, ferroalloy slag, granulated slag, copper smelting slag, red mud, fly ash, garbage incineration ash, and glass crushed material that have lost expansibility into slag powder having expandability and solidification Slag powder with expandability and solidification, mixed with one or more kinds of industrial waste such as concrete waste, waste gypsum, building materials such as gypsum, quicklime and crushed stone, artificial materials and mineral fine powder What can utilize the expansibility and solidification property of a granule can be used.
[0015]
As a result, the slag powder having expandability and solidification absorbs water, expands and solidifies, so that the ground around the pile can be easily, statically and surely compacted. In the case of the pile construction method, the soil hardened material layer and the ready-made pile are more closely attached, and thereby the expansion force can increase the support capacity of the pile and the amount of cement used can be reduced. .
Moreover, effective use of steelmaking slag etc. which are industrial waste can be aimed at.
[0016]
In addition, the auger screw 5 is configured to be able to rotate in the forward and reverse directions by the driving device 7 and is supported so as to be lifted and lowered by a lifting device (not shown).
The auger screw 5 includes a digging head 51 at the tip, a slit screw 52, a stirring rod 53, a connecting shaft 54 having a screw formed on the peripheral surface, and a large diameter portion 55 on the digging head 51. Are sequentially provided integrally.
[0017]
The large-diameter portion 55 of the auger screw 5 is a columnar member having a conical tapered portion 55a at the lower portion, and the volume of the large-diameter portion 55 inserted into the pile hole is obtained from the volumes of the pile and the hardened material. . The large-diameter portion 55 is a connection type, and the length can be easily adjusted so that the required volume integral is obtained.
In the present embodiment, the large-diameter portion 55 has substantially the same diameter as the excavation head 51, and the cross-sectional shape thereof includes a rotor-like triangle, a circle, a polygon, etc. with a bulge, and a shape suitable for the properties of the ground. They can be selected or used in combination.
For example, if a portion corresponding to the clay layer corresponds to a circle and a portion corresponding to the sand layer corresponds to a triangle, the construction efficiency increases and the soundness of the rubbed hole wall also improves.
[0018]
Hereinafter, the construction method of this ready-made pile is demonstrated concretely.
[0019]
As shown in FIG. 1 (a), the excavation work is performed by rotating the auger screw 5 while confirming the excavation core and supplying an appropriate amount of excavation water as necessary, at a speed suitable for the ground. The level is confirmed, and the pile hole 6 is excavated to a predetermined depth as shown in FIG.
At this time, the earth and sand corresponding to the volume of the auger screw large-diameter portion 55 is rubbed into the hole wall in contact with the large-diameter portion 55, and the large-diameter portion 55 causes the conical crush surface of the tapered portion 55a to act on the excavated soil. Then, the hole peripheral surface is gradually pressed to form the pile hole 6. Thereby, the large diameter part 55 can prevent collapse of the hole peripheral surface which faces.
[0020]
Then, as shown in FIG. 1 (c), the auger screw 5 is pulled up while being reversely rotated, and the hardened material 2 such as cement and slag powder mixture milk is injected from the tip of the auger screw 5, thereby excavating soil. 1 and the hardener 2 are mixed and stirred.
In this case, the auger screw 5 is repeated up and down in the range of about 1/2 of the pile length to mix and stir the hardened material 2 and the excavated soil 1, and this is repeated three times or more until reaching a predetermined depth by reverse rotation.
In addition, the injection amount of the hardener 2 is determined in advance by the soil type sample of the construction site board boring data, the soil type of the predetermined excavation length, the layer thickness, the N value, the groundwater level, and the like.
[0021]
For example, in sandy soil with a low water level, if there is a sandy soil layer with high water permeability, the filling liquid will flow out and affect the mixing and stirring with the excavated soil 1, including additives such as bentonite, Increase the amount of the curing material 2 (10 to 20%).
In sandy soil, once the ground is loosened, the volume increases by 1.1 to 1.2 times, so the amount of the hardener 2 is reduced (10 to 20%).
In the humus soil layer, since there are many voids in the stratified state, it tends to be a liquid loss. For this reason, the hardening material 2 is increased including an additive such as bentonite.
In the viscous soil layer, although depending on the N value, in the case of a viscous soil layer of 10 or less, there is a case where excavation and mixing agitation are performed while appropriately injecting water. Also includes additives such as dispersants.
For relatively hard viscous soil or sandy soil that does not collapse, the hole wall is self-supporting and the possibility of collapse is small, so a predetermined amount of the hardener 2 is injected accordingly.
As the hardener 2, a mixture of ordinary cement, blast furnace cement (ordinary cement mixed with blast furnace cement), fine powder blast furnace cement (single), and slag powder can be suitably used. .
[0022]
When the formation of the soil cement 3 is completed, as shown in FIGS. 1D to 1E, it is confirmed that the auger screw 5 has reached a predetermined depth by reverse rotation, and if necessary, from the tip of the excavation head 51. The auger screw 5 is pulled up after the root-solidified portion 8 is built by mixing and stirring in the range of the root-solidified portion 8 while injecting a root-solidifying solution (a cement-rich mixture).
[0023]
And as shown in FIG.1 (f), the ready-made pile 4 is built in the pile hole 6 which pulled up the auger screw 5, confirming perpendicularity.
In the case of joint piles, the lower pile is held by a holding device, and after checking and connecting the vertical axis and verticality of the upper and lower piles, it is built.
[0024]
Finally, as shown in FIG. 1 (g), the pile 4 is pushed down to a predetermined depth by rotary press-fitting or light hitting / press-fitting with monken and fixed in the pile hole 6.
[0025]
As described above, the method for constructing the ready-made pile according to the present embodiment excavates the pile hole with the auger screw 5 and the hardened material by the large-diameter portion 55 having substantially the same diameter as the excavation head 51 provided on the upper portion of the auger screw 5. 2 is rubbed into the hole wall of the pile hole 6 so that the amount of the excavated soil according to the volume of the prepared pile 4 and the volume of the ready-made pile 4 is rubbed, and the generation of general residual soil is reduced as much as possible. Prevents overflow, suppresses the generation of residual soil as industrial waste, greatly reduces the cost of processing industrial waste, and does not use extra hardener 2 and has a mixing and stirring stroke Because it is short, construction efficiency can be increased, construction costs can be reduced, and the ground around the hole wall near the head of the pile can be pressed and consolidated, increasing the ground reaction force and increasing the horizontal strength of the pile 4 Can do.
[0026]
In FIG. 3, the 2nd Example of the construction method of the ready-made pile of this invention is shown.
In addition to the construction method of the first embodiment, this ready-made pile construction method is provided with an enlarged large-diameter portion 56 having a larger diameter than the excavation head 51 at the upper portion of the large-diameter portion 55, and the enlarged large-diameter portion 56 and the large-diameter portion. The part 55 rubs the excavated soil in an amount corresponding to the injection amount of the hardener 2 and the volume of the ready-made pile 4 into the hole wall of the pile hole 6.
[0027]
The enlarged large-diameter portion 56 is formed of a columnar shape having a conical tapered portion 56a at the lower portion and a screw 56b formed in the tapered portion 56a, and the enlarged large-diameter portion 56 inserted into the pile hole 6; The volume of the large diameter portion 55 is determined from the volumes of the ready-made pile 4 and the hardened material 2. The enlarged large-diameter portion 56 is a connection type, and the length can be easily adjusted so that the required volume integral is obtained.
As the cross-sectional shape of the enlarged large-diameter portion 56, for example, a rotor-like triangle, circle, polygon or the like with a bulge can be adopted, and a shape suitable for the properties of the ground can be selected. A combination of these can also be used.
[0028]
Thus, by providing the enlarged large-diameter portion 56 in the upper portion of the large-diameter portion 55, the vicinity of the pile head is formed with a large diameter in one excavation process and economically constructed, and the ground of the soft ground near the pile head is provided. It is possible to improve the horizontal resistance of the pile 4 by the effect of supporting the ground improvement portion. Moreover, since the pile diameter can be designed with a size suitable for the vertical support force required to support the superstructure, a design in which the vertical and horizontal support forces are balanced can be achieved.
[0029]
Hereinafter, the construction method of this ready-made pile is demonstrated concretely.
[0030]
As shown in FIG. 3A, excavating to a predetermined position at a speed suitable for the ground while appropriately sending excavation water while checking the excavation core.
In this case, the enlargement of the head near the pile head is performed by the enlarged large-diameter portion 56, and the enlarged large-diameter portion 56 acts on the excavated soil with the conical crushing surface of the tapered portion 56a to gradually compress the hole peripheral surface. The pile hole 6 is formed by tightening.
[0031]
As shown in FIG. 3 (b), the auger screw 5 is reversed at the tip of the pile hole 6, the enlarged blade 57 of the excavation head 51 is opened, and the excavated material 2 is expanded to a predetermined depth and pulled up. .
[0032]
As shown in FIG. 3 (c), after switching the auger screw 5 to normal rotation and reexcavating the enlarged peripheral surface portion, the blades are expanded again by reverse rotation, and the auger screw 5 is repeated up and down at the enlarged peripheral surface portion, The hardened material 2 and the excavated earth and sand 1 are mixed and stirred, and this is repeated three or more times until reaching a predetermined depth by reverse rotation.
[0033]
As shown in FIG. 4 (d), while injecting the root-setting liquid from the bottom of the excavation, mixing and stirring in the range of the root-setting part 8 to build the enlarged root-setting part 8, and then rotating the expansion blade 57 by forward rotation. Is closed and the auger screw 5 is pulled up.
[0034]
Finally, as shown in FIG. 4E, the ready-made pile 4 is built and confirmed at a predetermined position while checking the verticality.
In addition, the structure of a pile uses the round pile 41 of the substantially same diameter as the node diameter of a lower node pile in the position corresponding to an upper head expansion part.
[0035]
As mentioned above, although the Example of this invention was described, the construction method of the ready-made pile of this invention is not limited to description of this Example, It is possible to change suitably in the range which does not deviate from the meaning. In addition, in the same manner (by omitting the step of FIG. 1 (f), (g) or FIG. 4 (e)), the soil cured product on-site pile can be constructed.
[0036]
【The invention's effect】
According to the method for constructing the soil cured material field-built pile and the ready-made pile of the present invention, the pile hole is excavated by the auger screw, and is hardened by the large diameter portion substantially the same diameter as the excavation head provided at the upper portion of the auger screw. The amount of excavated soil according to the amount of material injected and the volume of ready-made piles is rubbed into the hole walls of the pile holes, reducing the generation of general residual soil as much as possible and preventing the overflow of soil cement from the pile holes In addition, it suppresses the generation of residual soil that becomes industrial waste, greatly reduces the cost of processing industrial waste, and creates soil cement with stable quality without using extra hardener, and mixing Since the agitation stroke is short, construction efficiency increases, construction costs can be reduced, and the ground around the hole wall near the pile head can be pressed and consolidated, increasing the ground reaction force and increasing the horizontal strength of the pile. To increase Can.
[0037]
Further, an enlarged large-diameter portion having a diameter larger than that of the excavation head is provided on the upper portion of the large-diameter portion, and the enlarged large-diameter portion and the large-diameter portion allow the amount of excavated soil according to the amount of the hardener to be injected and the volume of the ready-made pile. By rubbing into the hole wall of the pile hole, the area around the pile head is formed into a large diameter in one excavation process and economically constructed, and the ground of the soft ground near the pile head is improved. The horizontal resistance of the pile can be increased by the bearing effect. Since the pile diameter can be designed with a size suitable for the vertical support force required to support the superstructure, it is possible to design with a balance between vertical and horizontal support force.
[0038]
Moreover, the mixture of the slag powder particle | grains which have expansion | swelling and solidification property containing expansion | swelling and solidification components, such as free CaO and free MgO, and cement can be used for the said hardening | curing material.
And the steelmaking slag (converter slag and / or electric furnace slag (oxidized slag and / or reduced slag) is said to the slag granular material which has the expansibility and the solidification property, and aging treatment is especially performed here. Steelmaking slag that does not lose its expansibility, such as steelmaking slag whose expansibility is adjusted by partially performing an aging treatment in addition to no steelmaking slag.), One or two types of waste incineration slag and sludge slag A mixture of the above can be used.
Furthermore, the steel slag, blast furnace slag, ferroalloy slag, granulated slag, copper smelting slag, red mud, fly ash, garbage incineration ash, and glass crushing that have lost the expansibility are added to the slag powder having expandability and solidification. Materials, concrete waste, industrial waste such as waste gypsum, gypsum, quicklime, crushed stone and other building materials, man-made materials, mineral powders, or a mixture of one or more, and has expandability and solidification What can utilize the expansibility and solidification property of a slag granular material can be used.
As a result, the slag powder having expandability and solidification absorbs water, expands and solidifies, so that the ground around the pile can be easily, statically and surely compacted. In the case of a pile construction method, the soil hardened material layer and the ready-made pile are more closely attached, whereby the expansion force can increase the support capacity of the pile.
In addition, by using slag granules with expandability and solidification in combination with cement, the amount of cement used can be reduced, construction costs can be reduced, and the fluidity of hardened milk (hardened material) can be improved. it can.
In addition, it is possible to effectively use steelmaking slag, which is industrial waste, and contribute to the formation of a recycling society.
[Brief description of the drawings]
FIG. 1 is a process diagram showing a first embodiment of a method for constructing a ready-made pile according to the present invention.
FIG. 2 is a front view showing an example of an auger screw.
FIG. 3 is a process diagram of the first half showing a second embodiment of the method for constructing a ready-made pile according to the present invention.
FIG. 4 is a process chart of the latter half showing a second embodiment of the method for constructing a ready-made pile according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Excavation soil 2 Hardening material 3 Soil cement 4 Ready-made pile 41 Round pile 5 Auger screw 51 Excavation head 52 Slit screw 53 Stirring rod 54 Connecting shaft 55 Large diameter part 55a Taper part 56 Expanding large diameter part 56a Taper part 56b Screw 57 Expansion blade 6 Pile hole 7 Drive unit 8 Rooting part L Ground

Claims (7)

In the construction method of soil hardened material construction pile that injects hardening material into excavated soil and forms pile, excavating pile hole with auger screw and large diameter of drilling head provided at the upper part of auger screw Rubbing the amount of excavated soil according to the injection amount of the hardened material into the hole wall of the pile hole with the diameter part, then injecting the hardened material into the excavated soil in the pile hole and repeating while rotating the auger screw forward and backward A method for constructing piles on site of cured soil, characterized by mixing and stirring by reciprocating and pulling up the auger screw. An enlarged large diameter portion having a diameter larger than that of the excavation head is provided on the upper portion of the large diameter portion, and the expanded large diameter portion and the large diameter portion allow an amount of excavated soil according to the amount of the hardener to be injected to the hole wall of the pile hole. 2. The method for constructing a pile of soil-cured piles according to claim 1, wherein the pile is rubbed. In the construction method of ready-made piles in which ready-made piles are built in soil cement in which hardener is injected into the excavated soil, a pile hole is excavated with an auger screw and a large diameter approximately the same diameter as the excavation head provided at the upper part of the auger screw Rubs the amount of hardened material into the hole wall of the pile hole, and then injects the hardened material into the drilled soil in the pile hole and rotates the auger screw forward and backward. The construction method of the ready-made pile characterized by carrying out mixing agitation by repeating and reciprocating, making the auger screw up, and then building the ready-made pile in the pile hole. An enlarged large-diameter portion having a diameter larger than that of the excavation head is provided on the upper portion of the large-diameter portion, and the enlarged large-diameter portion and the large-diameter portion are used to pile an amount of excavated soil according to the amount of the hardener injected and the volume of the ready-made pile The method for constructing a ready-made pile according to claim 3, wherein the method is rubbed into a hole wall of the hole. 5. The construction of a soil cured product on-site pile or ready-made pile according to claim 1, wherein the hardener is made of a mixture of slag powder particles and cement having expandability and solidification. Law. The soil hardened material on-site pile according to claim 5, wherein the slag powder particles having expandability and solidification properties are composed of one or a mixture of steelmaking slag, waste incineration slag and sludge slag. Or construction method of ready-made piles. Steel slag, blast furnace slag, ferroalloy slag, granulated slag, copper smelting slag, red mud, fly ash, garbage incinerated ash, glass crushed material, which has lost its expansibility, in the slag powder having expandability and solidification Concrete waste, industrial waste such as gypsum, building materials such as gypsum, quicklime, crushed stone, artificial materials, slag powder with expandability and solidification, mixed with one or more mineral powders The method for constructing a soil cured product site-built pile or ready-made pile according to claim 5 or 6, wherein the expandability and solidification property of the granules can be used.

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