KR20140122914A - Truncated pyramid block for reinforcing ground and foundation construction method using the truncated pyramid blocks - Google Patents

Abstract

Disclosed are a truncated pyramid block for reinforcing ground and a foundation construction method using the truncated pyramid block. The foundation construction method using the truncated pyramid block includes: a step of grading the upper part of the ground to be reinforced; a step of installing a plurality of truncated pyramid blocks to be close to the ground surface to be in contact with the ground of which the bottom surface of the truncated pyramid blocks is grading-processed, wherein the cross section of the truncated pyramid blocks is narrower from the upper surface towards the bottom surface; and a step of charging a space formed of side surfaces of the adjacent truncated pyramid blocks with filler. An upper structure can be supported since the ground is reinforced without forming a deep foundation such as a pile or the like on the ground which has insufficient support power to support the upper structure.

Description

Technical Field [0001] The present invention relates to a truncated pyramid block for reinforcing ground and a truncated pyramid block,

BACKGROUND OF THE INVENTION Field of the Invention [0002] The present invention relates to a foundation method using a ground truss block and a tine block. More particularly, the present invention relates to a foundation method using a truncated cone block to support an upper structure by reinforcing a ground without forming a deep foundation such as a pile on a ground where the support structure is not sufficient to support the upper structure.

When a structure such as a building is built on the ground, the weight of the structure and the load applied to the structure are transmitted to the ground stably, and a foundation is formed to prevent the occurrence of such obstacles such as subsidence, inclination, movement, .

If the ground is capable of supporting the load of the structure sufficiently, it is necessary to use a direct foundation (or shallow foundation) to transmit directly to the ground without using piles, The pile, the pier, the caisson, etc., can be used as the deep foundation to transmit the load of the structure to the lower ground having a sufficiently large bearing capacity.

On the other hand, a top-base foundation ('top pile') which forms a foundation directly on the reinforced ground by reinforcing the ground with a concrete block and a crushed stone in the form of a top without forming a supporting pile in the ground, Base ") is known.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view for explaining a base of a tower according to the prior art; FIG. Referring to FIG. 1, a method of forming a top base base according to the related art will be described. In the method of forming a base base of a conventional art, a rectangular grid hole having an equal interval in the vertical and lateral directions and a grid hole having a triangular shape at one corner in each square grid hole And the pile portion 54 of the top type concrete pile 10b is pulled through the grid holes of each triangle of the position fixing frame 60 and the pile portion 54 of the top type concrete pile 10b is press- Type concrete piles 10b at a price such as a height and a width. The connecting reinforcing bars 64 are welded to the respective connecting rings 56 exposed in the upper surface of the top body 52 in the transverse direction so that all the topike concrete piles 10b are connected and fixed to each other . The space between the bottom surface of the top-like body portion 52 of the top-shaped concrete pile 10b and the ground is filled with crushed stone while being compacted by the vibration means, and a crushed stone And the foundation foundation work using the top type concrete pile is completed.

When the deep foundation according to the prior art is applied to the ground where the supporting force is insufficient, there is a problem that the cost of the construction due to the insertion of the pile and the peer increases to the lower ground.

Further, in the case of the above-described top base foundation, since a plurality of top concrete blocks are arranged in contact with each other, the influence of the stress transmitted to the soil when a load acts on the ground due to the inclined surface of the top concrete block due to the group effect There is a disadvantage in that the range is deeper and overlaps with each other, and the supporting force is reduced. In addition, there are problems in that the process is complicated and the construction cost is increased due to the necessity of the installation of the top type concrete block, the welding of the connecting reinforcing bars, and the compaction of the filling crushed stone.

Korean Registered Patent No. 10-0721209 (2007.05.23)

The present invention provides a foundation method using a truncated cone block to support an upper structure by reinforcing a ground without forming a deep foundation such as a pile on a ground where the supporting structure is not sufficient for supporting the upper structure.

The present invention also provides a foundation method using a truncated cone block which can increase the supporting force and reduce the settlement amount by reinforcing the ground by using a truncated cone block having a simplified shape which can minimize the crowd effect.

According to an aspect of the present invention, there is provided a block for reinforcing a ground by being disposed on a plurality of ground surfaces, the block being made of a truncated cone block whose cross section is reduced from the top surface to the bottom surface, A prong block for ground reinforcement is provided.

The horn can be a pyramid, which is any one of an equilateral triangle, a square, a regular pentagon, and a regular hexagon.

The block may be provided with an incision section that is cut across two sides forming each vertex of the upper surface.

The distance between the bottom surfaces of the truncated cone blocks adjacent to each other may be equal to or greater than the diameter of a circle in contact with the outline formed by the bottom surface.

The angle? ₁ between the ground surface and the side surface of the square pyramid may be in the range of 45 ° to 56.3 °.

The size of the underside of the truncated cone block may be a value such that the depth of influence D _b of the influence range by the bottom surface of the truncated cone block and the depth of influence D _s of the influence range by the side surface of the truncated cone block are the same depth have.

According to another aspect of the present invention, there is provided a method of manufacturing a ground structure, comprising: grounding an upper portion of a ground to be reinforced; Providing a plurality of the truncated cone blocks adjacent to the ground surface such that the truncated cone blocks having a reduced cross-section from the top surface to the bottom surface are in contact with the ground surface where the bottom surface of the truncated cone blocks is stopped; And filling the gap between the spaces formed by the sides of the truncated cone blocks adjacent to each other with a filler.

The method may further include, after the filling step, placing the uncured concrete on the torn block filled with the filler and curing the concrete to form a concrete foundation.

The horn can be a pyramid, which is any one of an equilateral triangle, a square, a regular pentagon, and a regular hexagon.

The prisms may be provided with incisions which are cut across two sides forming the respective vertexes of the upper surface. The filling may be performed by filling the filler through the openings formed by the cut- . ≪ / RTI >

The distance between the bottom surfaces of the truncated cone blocks adjacent to each other may be equal to or greater than the diameter of a circle in contact with the outline formed by the bottom surface.

The angle? ₁ between the ground surface and the side surface of the square pyramid may be in the range of 45 ° to 56.3 °.

The size of the underside of the truncated cone block may be a value such that the depth of influence D _b of the influence range by the bottom surface of the truncated cone block and the depth of influence D _s of the influence range by the side surface of the truncated cone block are the same depth have.

The stopping step may include the step of flattening the upper surface by laying and compaction of a base material including at least one of crushed stone and sandy soil on the ground.

The equivalent diameters (B _{b, eq} ) of the bottom surface of the square pyramid can be calculated by the following equation,

Here, A _b is the area of the bottom surface

The foundation height of the base material may be not less than the value (2B _{b , eq} ) obtained by multiplying the equivalent diameter (B _{b, eq} ) by 2.

After the step of filling with the filler, a base material is laid on the torn block filled with the filler and the top surface is planarized by compaction; Disposing the truncated cone blocks adjacent to each other so that the bottom surface is in contact with the ground surface of the base material; And filling spaces between spaces formed by the sides of the truncated cone blocks adjacent to each other with a filler can be repeatedly performed.

According to the embodiment of the present invention, it is possible to support the upper structure by reinforcing the ground without forming a deep foundation such as a pile on the ground where the supporting force is not enough to support the upper structure.

In addition, it is possible to increase the bearing capacity and decrease the settlement volume by reinforcing the ground using the simplified truncated cone block which can minimize the crowding effect to reinforce the ground.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining a top base base according to the prior art; FIG.
BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a torsion bar for a ground reinforcement,
3 is a perspective view of a ground reinforcement block according to an embodiment of the present invention.
4 is a view for explaining an effect of a ground reinforcement block according to an embodiment of the present invention;
5 and 6 are views for explaining a method of determining the shape of a prong block for a ground reinforcement according to an embodiment of the present invention.
FIG. 7 is a view illustrating a use state of a torsion bar for ground reinforcement according to an embodiment of the present invention. FIG.
8 is a flowchart of a basic method using a truncated pyramid block according to another embodiment of the present invention.
9 to 13 are flowcharts of a basic construction method using a truncated cone block according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a torsion bar truss block according to a first embodiment of the present invention; FIG. And the description thereof will be omitted.

FIG. 2 is a view for explaining a shape of a ground reinforcement block 10 according to an embodiment of the present invention, and FIG. 3 is a perspective view of a ground reinforcement block 10 according to an embodiment of the present invention . 4 and 5 are views for explaining the effect of the ground reinforcement block 10 according to the embodiment of the present invention, and FIGS. 5 and 6 are views for explaining a ground reinforcement block for floor reinforcement according to an embodiment of the present invention 10 of the present invention. 7 is a use state diagram of the ground reinforcement block 10 according to an embodiment of the present invention. 2 to 7, the truncated cone block 10, the top surface 12, the bottom surface 14, the side surface 16, the cutout 18, the opening 19, the rectangular block 20, (22) are shown.

The ground reinforcement tine block 10 according to the present embodiment is a block for reinforcing the ground 24 by being disposed on the ground 24 in a plurality of planes and having a cross section reduced from the top surface 12 toward the bottom surface 14 And the bottom surface 14 is disposed so as to be in contact with the ground 24 surface.

The truncated cone is obtained by cutting a cone or a pyramid into two planes parallel to the bottom surface 14. The truncated cone block 10 according to the present embodiment has a cross section reduced from the top surface 12 toward the bottom surface 14 As shown in Fig. 7, a plurality of small-sized bottom surfaces 14 are formed on the ground surface so as to be in contact with the ground surface.

The truncated pyramid block 10 may be a truncated pyramid or truncated pyramid block such as a pyramidal pyramid, quadrangular pyramid, pyramidal pyramid, and hexagonal pyramid. In this embodiment, however, the pyramid block 10 may have a square pyramid shape with a top surface 12 and a bottom surface 14 Will now be described with reference to the truncated pyramid block 10 of FIG.

In the case of a truncated cone-shaped truncated cone block, the bottom surface is round and the side surface is rounded, so that the width of the influence range described later is formed to be larger than the width of the influence range of the truncated pyramid of the same area. Therefore, assuming that the bottom surface 14 has the same area, the truncated pyramid block 10 has a regular polygonal shape on the bottom surface and a constant angle of side surface, so that the overlapping of the influence range is smaller than that of the truncated pyramid block 10 It is possible to expect an increase in the holding force and a reduction in the settlement amount of the truncated cone-shaped truncated cone block 10.

The truncated cone block 10 can be made of concrete, synthetic resin, steel, etc., and a mold capable of forming the truncated cone block 10 on the ground surface is installed in the field, concrete is laid and the truncated cone block 10 is installed on the ground surface It is also possible.

The bottom surface 14 of the truncated cone block 10 constitutes a ground surface tangent to the ground surface, and the upper load is transmitted to the ground 24 through the ground surface. When a plurality of tine blocks 10 are provided adjacent to each other on the ground surface, a space is formed in the side surface 16 of the tine block 10 between adjacent tine blocks 10, A filling material containing at least one of crushed stone and sandy soil is filled and filled. The truncated cone block 10 is buried in the ground 24 and the side surface 16 of the truncated cone block 10 as well as the underside 14 of the truncated cone block 10 also transmit the upper load to the ground 24 .

In order to facilitate filling of the filling material 28 with the truncated cone block 10 installed on the ground surface, the truncated cone portion of the top surface 12 may be cut to form the cutout portion 18. That is, as shown in FIG. 3, the incision portion 18 is formed by cutting across two sides forming the respective vertexes of the upper surface 12. 7, the adjacent cutouts 18 form the openings 19 and the filler 28 can be filled through the openings 19, as shown in FIG. have.

Fig. 4 is a view for explaining the effect of the ground reinforcement block 10 according to the present embodiment. Fig. 4 (a) shows that a plurality of rectangular blocks are arranged adjacent to each other on the ground surface, 4 (b) show that the truncated cone blocks 10 according to the present embodiment are disposed adjacent to each other on the ground surface.

When the load is applied to the surface or the ground, this load causes stress in the ground 24. The ratio of the ground stress to the working load is called an underground stress factor. The distribution of the influence coefficients 22 indicates a range in which stress is generated in the ground 24 when a load acts on the ground surface, and this is called an influence range.

As shown in FIG. 4, the underground stress is reduced toward the edge as it is deeper at the loading position. Typically, one rectangular or circular foundation has a load of about 10% of the working load up to 2 times (2B) This is crazy. 4 (a), when a plurality of rectangular blocks 20 are disposed adjacent to each other on the ground surface, the influence range of each rectangular block 20 is overlapped and the influence range is enlarged (referred to as' (4B) to 5 times (5B) of the foundation width (B) on the ground surface. The expansion of this range of impacts leads to a decrease in bearing capacity and a decrease in bearing capacity causes a larger settlement. Accordingly, when the plurality of blocks are provided on the ground 24 and the ground 24 is to be reinforced, the influence range of each block is not overlapped with each other.

4 (b) shows that the tine blocks 10 according to the present embodiment are disposed adjacent to each other on the ground surface. The bottom surfaces 14 of the tine blocks 10, which are in contact with the ground surface and transmit the upper load, Since the influence range formed on the lower side of the bottom surface 14 of each truss block 10 is not overlapped with each other, unlike the rectangular block 222, there is no reduction in the supporting force, and the upper load is uniformly distributed in the ground 24 .

FIGS. 5 and 6 are views for explaining a method of determining the shape of the ground prism block 10 according to the present embodiment. Hereinafter, a method for determining the shape of the ground truss block 10 will be described based on the principle of the truss block 10 as described above.

First, as described above, the spacing distance of the bottom surface 14 of the truncated cone block 10 adjacent to each other is set so that the distance between the bottom surface 14 of the adjacent truncated cone blocks 10 Is set to be equal to or larger than the diameter of a circle in contact with the outline formed by the bottom surface (14). That is, when the truncated cone block 10 is in the form of a regular truncated pyramid, the bottom surface 14 forms an equilateral triangle, a square, a regular pentagon, and a regular hexagon. By separating the bottom surface 14 by the diameter of a circle, The overlapping of the influence range can be avoided by disposing the movable member 10.

On the other hand, a plurality of truncated cone blocks 10 are provided on the surface of the ground to fill the spaces between the adjacent side surfaces 16 of the truncated cone blocks 10 with the filling material 28, The bottom surface 14 of the tine block 10 and the side surface 16 of the tine block 10 also transmit the upper load to the ground 24. The stress in the ground 24 generated by the side surface 16 of the tine block 10 is different from the stress acting in the ground 24 caused by the bottom surface 14 of the tine block 10, Therefore, they do not affect each other. However, since the plurality of truncated cone blocks 10 are provided adjacent to each other, the range of influence of the underground stress due to the side surface 16 of the truncated cone block 10 is overlapped with each other, (5B _{s , eq} ) of the equivalent diameter (B _{s , eq} ) of the side surface 16 perpendicularly to the center of the side surface 16 by the side surface 16 of the torn block 10 Can be assumed.

Here, the equivalent diameter refers to a diameter for converting the side surface 16 into an equivalent circle, and can be determined by the following expression (1).

[Formula 1]

5 is a view for explaining a method for determining the angle? ₁ between the ground surface and the side surface 16 of the torsion bar 10 for reinforcing the ground, assuming that a uniform distribution load is applied to the top of the torsion bar 10 A normal stress σ _n occurs in a direction perpendicular to the side surface 16 of the truncated cone block 10 and a shear stress σ _s occurs along the side surface 16 due to the friction of the soil.

The relationship of the following [Equation 2] holds between the normal stress (? _N ) and the shear stress (? _S ).

[Formula 2]

Further, the position-dependent magnitude (Δσ _z ) of the underground normal stress due to the shear stress (σ _s ) generated in the side surface (16) of the warp block (10) due to stress dispersion can be expressed by the following equation (3).

[Formula 3]

The angle formed by the side surface 16 of the tine block 10 with respect to the ground surface in order to minimize the increase in the normal stress? _N according to the shear stress? _S due to the friction of the soil &thetas; ₁ ) must satisfy the range of the following formula (4)

[Formula 4]

The average value of Δσ _z is found at x = 2b _s by calculating the position-dependent magnitude (Δσ _z ) of the vertical stress of the ground by the length (x) in the horizontal direction of the side surface 16 according to the above-mentioned [Expression 3]. Thus, assuming that the range of influence by the side surface 16 of the truncated pyramid block 10 is 10b _s ,

as,

In order to minimize the increase of the normal stress (? _N ) according to the shear stress (? _S ) due to the friction of the soil, the angle? ₁ formed by the side surface (16) of the torn block (10) 5].

[Formula 5]

That is, the angle? ₁ between the _ground surface and the side surface 16 of the tine block 10 is in the range of 45 to 56.3.

Thus, the angle? ₁ formed by the side surface 16 with respect to the bottom surface 14 (or the _{ground surface} ) is selected within the range of 45 to 56.3 degrees, and the lower portion of the bottom surface 14 of the adjacent torn block 10 The size of the bottom surface 14 is determined so that the distance of the bottom surface 14 of the adjacent tine block 10 is equal to or larger than the diameter of a circle in contact with the outline formed by the bottom surface, The shape of the truncated cone block 10 can be determined.

On the other hand, the shape and size of the truncated cone block 10 can be determined by the following method (see FIG. 6). That is, ppuldae block 10, the bottom 14 affect the impact range of the depth of the (D _b) and ppuldae block 10, the side effects of the influence range by the 16 field of (D _s) is such that the same depth To determine the shape of the truncated cone block 10. Here, the depth of influence means the vertical depth at the ground surface from the top surface 12 of the tine block 10 to the lowermost part of the influence range.

Referring to FIG. 6, the depth of influence (D _b ) of the bottom surface 14 is determined according to the condition of the ground 24 by either of D _b1 and D _b2 according to the following equation (6) If the case of the preferred Sands (24) can assume the effect of field by the bottom 14 to the D _b1, the soil 24 strength is low soft ground (24) or a clay soil (24), the D _b2 .

[Formula 6]

The depth of influence (D _s ) of the side surface 16 is expressed by Equation 7 below,

[Equation 7]

To determine the shape and size of the bottom surface 14 such that the depth of influence of the bottom surface 14 and the depth of influence of the side surface 16 are the same.

More specifically, the angle? ₁ formed by the side surface 16 with respect to the bottom surface 14 (or the _{ground surface} ) is selected within the range of 45 to 56.3 degrees, and the depth of influence of the bottom surface 14 and the depth The equivalent diameters B _{b and eq} of the bottom surface 14 are determined such that the depths of influence are equal to each other and the shape and size of the bottom surface are determined by converting the equivalent diameters B _{b and eq} into regular polygons such as a regular triangle, .

FIG. 8 is a flowchart of a basic construction method using a truncated cone block 10 according to another embodiment of the present invention, and FIGS. 9 to 13 are flowcharts of a basic construction method using a truncated cone block 10 according to another embodiment of the present invention . 14 is a view for explaining a modification of the basic construction method using the truncated cone block 10 according to another embodiment of the present invention. 9-14 show the trident block 10, the top surface 12, the bottom surface 14, the side surface 16, the ground 24, the base material 26, the filler 28 and the concrete foundation 30, .

The foundation method using the truncated cone block 10 according to the present embodiment includes the steps of: leveling the upper part of the ground 24 to be reinforced; A plurality of tine blocks 10 are formed on the ground surface so that the bottom surface 14 of the tine-like tine block 10 whose cross section is reduced from the top surface 12 toward the bottom surface 14 is in contact with the ground surface, Adjacent to each other; And between the spaces formed by the side surfaces (16) of the adjacent truncated cone blocks (10) with a filler (28).

The grounding method using the truncheon block 10 according to the present embodiment reinforces the ground 24 without forming a deep foundation such as a pile on the ground 24 where the supporting force is insufficient for supporting the upper structure, And the ground block 24 is reinforced by using the truncated cone block 10 whose shape is simplified so as to minimize the crowd effect, thereby increasing the supporting force and decreasing the settlement amount.

Referring to FIGS. 9 and 10, the upper part of the ground 24 to be reinforced is grounded (step S100). Referring to FIG. Because of the lack of settlement and bearing capacity of the superstructure, the foundation 24 that needs reinforcement is flat and evenly organized. In this step, the base material (26) including at least one of crushed stone and sandy soil may be laid on the ground (24), and the upper surface may be planarized.

In the case of the sandy ground 24 having a good strength of the ground 24, it is possible to perform a stopping operation on the upper portion of the ground 24, and in the case of soft ground or clayey soil having low strength of the ground 24, The base material 26 including at least one of crushed stone and sandy soil may be laid on top of the stopped ground 24 after planar and evenly arranged, and the upper surface may be flattened by compaction.

The ground 24 may be stopped according to the load of the upper structure to be installed or the base material 26 may be installed on the upper portion of the stopped ground 24 to improve the upper portion of the ground 24 to a good ground 24 .

As the base material 26, it is possible to use a crushed stone having good distribution of particles having various particle sizes, a crushed stone having a good soil strength, or a mixture of the crushed stone and the crushed stone. The selection of the base material 26 can be determined according to the load of the upper structure to be installed.

The upper structure means a structure constructed or placed on a foundation reinforced according to the present embodiment such as a building, a pier, a culvert, a sewer line, an underground parking lot, a retaining wall, and the like.

11, the bottom 14 of the truncated cone-shaped block 10 whose cross section is reduced from the top surface 12 toward the bottom surface 14 is brought into contact with the stationary ground surface, 10) are disposed adjacent to each other on the ground surface (S200).

The truncated pyramid block 10 may be a truncated pyramid or truncated pyramid block such as a pyramidal pyramid, quadrangular pyramid, pyramidal pyramid, and hexagonal pyramid. In this embodiment, however, the pyramid block 10 may have a square pyramid shape with a top surface 12 and a bottom surface 14 The torsion bar 10 of the torsion bar 10 is installed on the ground surface as shown in Fig. The plurality of truncated cone blocks 10 can be arranged such that the outer periphery of the top surface 12 is in contact with each other.

The shape of the truncated pyramid block 10 is determined by selecting the angle? ₁ formed by the side surface 16 with respect to the bottom surface 14 (or the _{ground surface} ) within the range of 45 to 56.3 degrees, The spacing of the bottom surface 14 of the adjacent truncated cone blocks 10 is set such that the contour of the bottom surface 14 of the truncated cone block 10 does not overlap with that of the bottom surface 14 of the truncated cone block 10, The shape of the tine block 10 can be determined by determining the size of the bottom surface 14 so as to be equal to or greater than the diameter of the tine block 10.

12, the filler 28 is filled between the spaces formed by the side surfaces 16 of the adjacent truncated cone blocks 10 (S300). When a plurality of tine blocks 10 are provided adjacent to each other on the ground surface, a space is formed in the side surface 16 of the tine block 10 between adjacent tine blocks 10, And filling the filler 28 with the filler 28. The truncated cone block 10 is buried in the ground 24 and the side surface 16 of the truncated cone block 10 as well as the underside 14 of the truncated cone block 10 also transmit the upper load to the ground 24 .

On the other hand, in order to facilitate filling of the filling material 28 with the truncated cone block 10 being installed on the ground surface, truncated cones can be formed by cutting each vertex of the truncated cone 12. 7, the adjacent cutouts 18 form the openings 19 and the filler 28 can be filled through the openings 19, as shown in FIG. have.

As the filler 28, it is possible to use a crushed stone having good distribution of particles having various particle sizes distributed in the same manner as the base material 26, a crushed stone having a good strength of the crushed soil 24, or a crushed stone mixed with the crushed stone have. The selection of the filler 28 may be determined according to the load of the upper structure to be installed, as in the case of selecting the base material 26. It is possible to apply compaction so that the filling material 28 is well filled in the spaces formed by the plurality of truncated cone blocks 10 during the charging process.

13, unhardened concrete is laid on the torn block 10 filled with the filler 28 and cured to form the concrete foundation 30 (S400). When the lower foundation is formed through the above-described steps, the uncured concrete is laid on the torn block 10 filled with the filler 28 according to the shape of the upper structure, and cured to form the concrete foundation 30. For example, if the upper structure is a building, the concrete is laid and cured to form the concrete foundation 30, and the building is built on the concrete foundation 30. [

It is also possible to mount the upper structure directly on the torn block 10 without forming the concrete foundation 30 when the upper structure is a cow or box structure.

On the other hand, when the base material 26 is formed on the ground 24, the height of the base material 26 can be determined to be equal to or greater than a value (2B _{b , eq} ) obtained by multiplying the equivalent diameter B _{b, eq} by 2 . When the base material 26 is laid on the ground surface at the height, the influence range of the truncated cone block 10 is located in the base material 26 having a good strength of the ground 24, so that a more stable foundation can be formed.

Fig. 14 is a view for explaining a modification of the foundation method using the truncated pyramid block 10 according to the present embodiment. When the load due to the upper structure is large or the ground 24 is very soft, Can be constituted by multiple layers.

That is, after the step of filling with the filler 28 of the above embodiment, the base material 26 comprising at least one of the crushed stone and the sandy soil is laid over the torn block 10 filled with the filler 28, And the torsion blocks 10 are arranged adjacently to each other so that the bottom surface 14 is in contact with the ground surface of the base material 26 on top of the flattened base material 26 and then the adjacent torsion blocks 10 And filling the space between the spaces formed by the side surfaces 16 of the upper and lower substrates 10 and 20 with the filler 28. Thus, the lower base according to the embodiment can be formed in multiple layers.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

Many embodiments other than the above-described embodiments are within the scope of the claims of the present invention.

10: Trim block 12: Top surface
14: bottom surface 16: side surface
18: incision section 19: opening
20: square block 22: influence coefficient distribution
24: Ground 26: Base material
28: Filler 30: Concrete foundation

Claims (16)

A plurality of blocks arranged on the ground surface to reinforce the ground,
Wherein the base block is made of a truncated cone block whose cross section is reduced from the top surface to the bottom surface, and the bottom surface is disposed in contact with the ground surface.
The method according to claim 1,
The horn-
Wherein the upper surface and the lower surface are square pyramids, which are any one of an equilateral triangle, a square, a regular pentagon, and a regular hexagon.
3. The method of claim 2,
In the block,
Characterized in that a cut-out portion is formed which is cut across two sides forming the respective vertexes of the upper surface.
3. The method of claim 2,
The spacing between the bottom surfaces of the truncated cone blocks adjacent to each other,
Wherein the torsion bar has a diameter equal to or larger than a diameter of a circle in contact with an outline formed by the bottom surface.
5. The method of claim 4,
Wherein the angle? ₁ between the ground surface and the side surface of the square pyramid is in the range of 45 to 56.3.
3. The method of claim 2,
The size of the bottom surface of the truncated cone-
Effect of influence range by the bottom surface of the ppuldae block depth (D _b) and, ppuldae block for ground reinforcement, characterized in that the value of the ppuldae influence of impact range by the side of a block of field (D _s) is such that the same depth .
Grounding the upper part of the ground to be reinforced;
Providing a plurality of the truncated cone blocks adjacent to the ground surface such that the truncated cone blocks having a reduced cross-section from the top surface to the bottom surface are in contact with the ground surface where the bottom surface of the truncated cone blocks is stopped; And
Filling the space between the spaces formed by the sides of the truncated cone blocks adjacent to each other with a filler.
8. The method of claim 7,
After the charging step,
Further comprising the step of casting and curing unhardened concrete on top of the trident block filled with the filler to form a concrete foundation.
8. The method of claim 7,
The horn-
Wherein the upper surface and the lower surface are a square pyramid, which is any one of an equilateral triangle, a square, a regular pentagon, and a regular hexagon.
10. The method of claim 9,
In the square pyramid,
Wherein a cut portion is formed to cut across two sides forming each vertex of the upper surface,
The step of charging comprises:
Wherein the filling is performed by filling the filler through an opening formed by a cut portion of the truncated cone block adjacent to the truncated cone block.
10. The method of claim 9,
The spacing between the bottom surfaces of the truncated cone blocks adjacent to each other,
Wherein a diameter of a circle in contact with an outline formed by the bottom surface is equal to or larger than a diameter of a circle in contact with the outline formed by the bottom surface.
12. The method of claim 11,
Wherein the angle? ₁ between the ground surface and the side surface of the square pyramid is in the range of 45 to 56.3.
10. The method of claim 9,
The size of the bottom surface of the truncated cone-
Is a value such that the depth of influence (D _b ) of the influence range by the bottom surface of the truncated cone block and the depth of influence (D _s ) of the influence range by the side surface of the truncated cone block are the same depth. Method.
8. The method of claim 7,
Wherein the stopping comprises:
And a step of flattening the upper surface by laying a foundation material containing at least one of crushed stone and sandy soil on the upper part of the ground and compaction.
15. The method of claim 14,
The equivalent diameter (B _{b, eq} ) of the bottom surface of the square pyramid is calculated by the following equation,

Here, A _b is the area of the bottom surface
The foundation height of the base material,
(2B _{b , eq} ) obtained by multiplying the equivalent diameter (B _{b, eq} ) by two.
8. The method of claim 7,
After filling with the filler,
Disposing a base material on top of the truncated cone block filled with the filler and planarizing the top surface;
Disposing the truncated cone blocks adjacent to each other so that the bottom surface is in contact with the ground surface of the base material; And
And filling the space between the spaces formed by the side surfaces of the truncated cone blocks adjacent to each other with the filling material is repeatedly performed.

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