JP6669815B2 - Foundation groundwork design system and pile placement optimization method - Google Patents

Description

  The present invention relates to a foundation groundwork design system and a pile placement optimization method.

Conventionally, in foundation groundwork design of buildings such as houses (design of pillars, beams, foundations, piles (including improved bodies)), considering the overall load of the building and the resistance to external forces, The specifications, arrangement and number are determined.
As a method for determining the arrangement of such piles, for example, as shown in Patent Literature 1, a plurality of standards having a quadrangular shape including at least one base line segment in a foundation plan from a foundation plan of a building are disclosed. Calculate the burden load that each foundation beam bears according to the multiple reference areas that are divided into areas, and determine the placement of piles and the required number of piles as a whole building from the overall load of the building and the bearing capacity of the piles. Is known.

Japanese Patent No. 5686852

However, the method of determining the arrangement and the number of piles described in Patent Document 1 described above is a method in which a pile is arranged on a foundation beam using a base plan. For this reason, structural calculations cannot be performed without a base plan, and there is room for improvement in terms of optimization of the entire building.
Further, in the conventional design method, since it takes time to design each case, it is required to further reduce the time required for the design.

  Therefore, the present invention has been made in order to solve the above-mentioned disadvantages, it is possible to further optimize the number and arrangement of piles, and a basic groundwork design system capable of shortening the design time, And to provide a method of optimizing the arrangement of piles.

  To achieve the above object, the foundation groundwork design system according to the present invention is a foundation groundwork design system for determining the arrangement of foundations and piles of a building, the load of the building, a plan view, a foundation cross section, And an information storage unit for storing pile design information of ground data, a placement region setting unit for setting a placement region of the pile from the plan view of the building, and a load of the building evenly over the entire basic pressure-resistant board in the placement region. A dominant area calculation unit that calculates a dominant area to be borne by one selected pile and calculates a maximum distance between the piles in two directions orthogonal to each other within the range of the dominant area. A pile-to-pile distance calculation unit that calculates by calculation, and a pile-dominated region setting unit that sets a square-shaped pile-dominated region having a side length along each of the two directions set from the maximum distance between the piles in the controlled area, And said In the internal area of the placement area, in the internal pile setting unit that calculates the arrangement and the number of piles by arranging the pile dominant areas along the two directions without gaps, and in the external area excluding the internal area in the placement area And an external pile setting unit that calculates the arrangement and number of piles within the range of the dominant area and the arrangement state of the piles set in the internal region.

  Further, the pile placement optimization method according to the present invention is a pile placement optimization method for optimally placing a pile in the placement area using the above-mentioned foundation groundwork design system, wherein the load of the building, A step of storing pile design information of a floor plan, a foundation section, and ground data; a step of setting a pile placement area from the plan view of the building; and a step of equalizing a load of the building over the entire foundation pressure-resistant board in the placement area. Calculating the dominant area borne by one selected pile, and calculating the maximum distance between the piles in the two directions in the range of the dominant area by a stress calculation. In the controlling area, a step of setting a square-shaped pile controlling area having a side length along each of the two directions from the maximum distance between the piles, and in the inner area of the arrangement area, the pile controlling area The two sides Calculating the arrangement and the number of piles by arranging them without gaps along, and in the outer region excluding the inner region in the arrangement region, the arrangement state of the piles set in the inner region and the range of the dominant area And calculating the number of piles and the number of piles.

In the present invention, for the basic pressure plate of the building arrangement area, the pile control area of the control area calculated from the pile used is arranged, and first, the arrangement and the number of piles in the internal area of the arrangement area are calculated, Thereafter, the arrangement and the number of piles in the outer region excluding the inner region in the arrangement region can be calculated. This makes it possible to appropriately share the supporting force of the piles with the foundation pressure plate, so that the piles can be arranged more optimally and the number of piles can be reduced.
As described above, in the present invention, the dominant area of the pile and the maximum distance between the piles obtained by the stress calculation are calculated for the foundation pressure plate, and it is not necessary to calculate for the foundation beam. Calculation can be performed without a diagram, and design time can be reduced.

  Further, in the basic groundwork design system according to the present invention, it is preferable that the basic groundwork design system includes an arrangement area partitioning section that divides the plurality of arrangement areas into a square shape from the plan view of the building.

  In this case, even if the plane of the building is not square, dividing the square arrangement area from the plane will allow one pile to be used for the divided square arrangement area. It is possible to efficiently arrange the pile control area per hit. Thereby, piles can be arranged more optimally, and the number of piles can be reduced.

  Further, in the foundation groundwork design system according to the present invention, in the inter-pile distance calculation unit, the calculated dominant area is assumed to be a square, and in the internal pile setting unit, one of the two directions in the arrangement area is set. The maximum distance between piles in the first direction is set such that the span between piles in the first direction is equal to or less than the side length of the dominant area of the square, and the span between piles in the other second direction in the placement area is The maximum distance between the piles in the second direction that is equal to or less than the dominant area may be set.

  In this case, the span between the piles in the two directions in the arrangement area can be arranged at the maximum distance, respectively, the piles can be arranged more optimally, and the number of piles can be reduced.

  Further, in the foundation groundwork design system according to the present invention, the pile-to-pile distance calculation unit calculates a maximum distance between outer peripheral piles in an outer peripheral region in a cross section of a foundation beam provided on an outer peripheral part of the building by stress calculation, and In the dominant region setting unit, in the dominant area, a quadrangular outer peripheral pile dominating region having a side length along each of the two directions from the outer peripheral pile maximum distance in the outer peripheral region is set. The arrangement and the number of piles may be calculated by arranging the peripheral pile dominating areas along the peripheral area.

  In this case, based on the foundation beams provided in the outer peripheral area in addition to the basic pressure-resistant panel, the span between piles can be increased and the arrangement and number of piles can be set, thus reducing the number of piles in the external area. As well as more optimal placement of the stakes.

  Further, in the foundation groundwork design system according to the present invention, the outer pile setting section first arranges a pile at each vertex of the outer peripheral area, and then arranges the outer peripheral pile control area inside a side of the outer peripheral area. By doing so, the arrangement and the number of piles in the entire outer peripheral area may be calculated.

  In this case, piles are automatically arranged at each vertex of the outer peripheral area, and thereafter, processing for determining the arrangement and the number of piles inside the side of the outer peripheral area is performed. Therefore, the processing amount (calculation amount) performed in the external pile setting unit can be reduced, the time required for processing can be reduced, and the design time can be shortened.

  Further, in the foundation groundwork design system according to the present invention, the number of piles calculated by the inner pile setting unit and the outer pile setting unit satisfies the required number of piles required in the arrangement area as the whole building. It may be characterized by having a pile number judging unit for judging whether or not it is performed.

  In this case, by comparing the optimized number of piles calculated by the basic groundwork design system described above with the required number of piles required in the arrangement area as the entire building, the number of piles and the arrangement mode Can be determined. Therefore, the number of piles is not unnecessarily increased, and optimization can be achieved even when the number of piles is smaller than the required number.

  ADVANTAGE OF THE INVENTION According to the foundation groundwork design system and the pile placement optimization method of the present invention, it is possible to further optimize the number of piles and the placement, and to shorten the design time.

FIG. 1 is a schematic block diagram illustrating a configuration example of a basic groundwork design system according to an embodiment of the present invention. It is a longitudinal section showing the schematic structure of the building of this embodiment. It is a top view which shows the arrangement | positioning state of the pile of the L-type building in planar view, and shows the design result by a foundation groundwork design system. (A) is a plan view showing a first arrangement region, and (b) is a plan view showing a second arrangement region. (A), (b) is a top view which shows the control area of a pile. It is a figure showing an operation flow using a basic groundwork design system.

  Hereinafter, a foundation groundwork design system and a pile placement optimization method according to an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a basic groundwork design system 1 according to the present embodiment is a system for determining the arrangement of foundations and piles of a building 2 shown in FIG. 2, and a program for causing the system 1 to function. Is used.
Here, the foundation structure of the building 2 includes a foundation beam 20 provided at a predetermined position inside and outside the building 2 in a plan view, and a basic pressure-resistant panel 3 such as a slab provided on the entire site of the building 2. Have.

  The design processing device arbitrarily includes a CPU (arithmetic processing device), a data transmission / reception interface, a storage device such as an HDD or SSD, an input device such as a ROM, a RAM, a keyboard, and a mouse, and an output device such as a display or a printer. .

  As shown in FIG. 1, the basic groundwork design system 1 includes an information storage unit 11, an arrangement area setting unit 12, a controlled area calculation unit 13, a pile distance calculation unit 14, a pile control area setting unit 15, an internal pile setting unit. 16, an external pile setting unit 17, an arrangement area partitioning unit 18, and a processing unit of a pile number determination unit 19. The processing units denoted by reference numerals 13 to 19 in the basic groundwork design system 1 are pile automatic arrangement units 10 and have a function of automatically arranging the piles 4 at the optimum positions in the basic pressure-resistant panel 3 in the arrangement area of the building 2. Have.

  As means for configuring the basic groundwork design system 1 in the present embodiment, input means for displaying a screen for the system user to input the specifications of the building 2 and the like, and the foundation is automatically or manually arranged based on the drawings. Foundation arrangement means, storage means (including the information storage unit 11) for storing coefficients for performing various calculations such as the overall load of the building 2, output means for displaying or outputting the final result, and arrangement of the pile 4 Although there are updating means and the like capable of automatically or manually correcting information, each of these means is appropriately applied within the scope of known technology.

  The information storage unit 11 is provided so that the load, the plan view, the foundation section, and the pile design information of the ground data of the building 2 can be input and stored. In addition, the information storage unit 11 also stores information such as the type of the stake 4 used for the building 2.

  As shown in FIGS. 1, 3, 4 (a), and (b), the placement area setting unit 12 determines the placement area R of the pile 4 (solid line R 1, R 2 shown in FIG. 3) from the plan view of the building 2. Is set. In addition, the arrangement area setting unit 12 is configured to include the above-described arrangement area division unit 18 that divides a plurality (two in this case) of the arrangement areas R1 and R2 that have a square shape from the plan view of the building 2. . The placement areas R1 and R2, which are defined and set by the placement area partitioning section 18, are divided into squares with as large an area as possible, that is, divided into the largest rectangles that can be divided.

  The dominant area calculation unit 13 selects the stake 4 to be used, calculates as a leveling load so as to evenly distribute the load of the building 2 over the basic pressure-resistant panel 3 in the arrangement region R, and FIG. As shown in b), a process of calculating a dominant area S (S1, S2) borne by a single preselected pile is performed. FIG. 5A shows the dominant area S1 used for the first arrangement region R1, and FIG. 5B shows the dominant area S2 used for the second arrangement region R2.

The inter-pile distance calculation unit 14 performs a process of calculating the maximum inter-pile distance in the XY directions (two directions) orthogonal to each other by stress calculation within the range of the dominant area S.
Here, the stress calculation performed by the pile-to-pile distance calculation unit 14 includes building loads, conditions of the foundation pressure plate 3 (thickness, cover thickness, slab rebar, effective strength, long-term allowable tensile stress of rebar, long-term concrete Calculated using allowable shear stress), long-term bending moment, long-term shear force, short-term bending moment, short-term shear force, and the like. Then, between long-term piles, for example, a beam having a width of 1 m is calculated, and between short-term piles, the total load is calculated as 1.5 times.

  In the pile dominating region setting unit 15, in the dominant area S, as shown in FIGS. 5 (a) and 5 (b), each of which has a side length along each of the X and Y directions from the maximum pile distance calculated by the pile distance calculating unit 14. A process of setting the indicated pile dominant region D (D1, D2) is performed. The first pile dominant region D1 shown in FIG. 5A has a first dominant area S1 and is set in a square shape having vertical and horizontal side lengths d1 and d2. FIG. 5 (b) has a second dominant area S2, and is set to a quadrangular shape having vertical and horizontal side lengths d3 and d4.

The internal pile setting unit 16 arranges the pile dominant regions D (D1, D2) in the internal regions Ra of the two arrangement regions R1, R2 shown in FIG. Processing for calculating the arrangement and the number is performed. Here, the internal region Ra may be any size as long as it is inside the arrangement regions R1 and R2, and refers to a region where the pile dominant region D is arranged.
Specifically, in the example shown in FIG. 3, in the internal region Ra of the first arrangement region R1, the first pile dominant region D1 is arranged in two rows in the X direction (first direction, left and right direction in FIG. 3) and in the Y direction (second direction). Direction (vertical direction in FIG. 3). In the internal region Ra of the second arrangement region R2, the second pile dominant regions D2 are arranged in three rows in the X direction and one row in the Y direction.

At this time, the inter-pile distance calculating unit 14 assumes that the calculated dominant area S is a square. Then, in the internal pile setting unit 16, the maximum distance L1 between the piles in the X direction (the maximum distance between the piles in the first direction) in which the span between the piles in the X direction of the arrangement region R is equal to or less than the side length of the square control area S is set. Is done. Similarly, the maximum distance L2 between the piles in the Y direction (the maximum distance between the piles in the second direction) in which the span between the piles in the Y direction in the arrangement region R is equal to or smaller than the dominant area S is set. Here, the maximum distance L1 between the piles in the X direction and the maximum distance L2 between the piles in the Y direction correspond to the span between the piles 4 located in the internal region Ra in FIG.
In FIG. 3, thick line symbols L1 and L2 indicate distances extending from the stake 4 located in the internal area Ra to the outer peripheral portion of the building 2.

The outer pile setting unit 17 calculates the arrangement and the number of the piles 4 in the arrangement state of the piles 4 set in the inner area Ra and the range of the dominant area S in the outer area Rb excluding the inner area Ra in the arrangement area R. Processing is performed.
The external pile setting unit 17 uses the foundation beam 20 (see FIG. 2) provided on the outer peripheral portion of the building 2 to place the pile 4 on the vertex r1 of the foundation beam 20 (see FIGS. 4A and 4B). By arranging them so that they are always provided, the calculation can be further simplified, the design efficiency can be improved, and the time required for the calculation can be reduced.

Specifically, as the pile calculation processing in the external region Rb, as shown in FIGS. 3 and 4A and 4B, the pile-to-pile distance calculation unit 14 includes a foundation beam 20 (see FIG. In the cross-section (see FIG. 2), a process of calculating the maximum distance between the outer peripheral piles in the outer peripheral region Rc by stress calculation is performed. Then, in the pile dominating region setting unit 15, in the dominating area, a quadrangular outer peripheral pile dominating region having a side length along each of the XY directions from the maximum distance between the outer peripheral piles in the outer peripheral region Rc (FIGS. 5A and 5B). ), A process of setting a region with a predetermined aspect ratio in the pile dominating region D) is performed. Further, the external pile setting unit 17 performs a process of arranging the peripheral pile dominating regions along the peripheral region Rc and calculating the arrangement and the number of piles.
Then, the outer pile setting unit 17 first arranges the pile 4 at each vertex r1 of the outer peripheral region Rc, and then arranges the outer peripheral pile dominating region inside the side r2 of the outer peripheral region Rc, thereby obtaining the entire outer peripheral region Rc. The arrangement and the number of the piles 4 may be calculated. In FIG. 3, the piles arranged inside the side of the outer peripheral region Rc are omitted.

  The pile number determination unit 19 determines whether the number of piles calculated by the internal pile setting unit 16 and the external pile setting unit 17 satisfies the required number of piles required in the arrangement region R of the whole building. Is performed.

  Next, regarding the method of optimizing the pile arrangement in which the pile 4 is optimally arranged in the arrangement area R using the basic groundwork design system 1 having the above-described configuration, the block diagram shown in FIG. 1 and the operation flow shown in FIG. This will be described using an example of a design example.

  First, in step S1, the information storage unit 11 stores the load of the building 2, the plan view, the foundation section, and the pile design information of the ground data. The building 2 employed here has a substantially L-shaped planar shape extending in the XY directions.

  Next, in step S2, the arrangement area setting unit 12 (arrangement area division unit 18) divides the arrangement areas R1 and R2 of the square pile 4 from the plan view of the building 2 stored in the information storage unit 11. Divide and set. The first arrangement region R1 is set as a rectangular region extending in the vertical direction (Y direction) in FIG. 3, and the second arrangement region R2 is set as a rectangular region extending in the horizontal direction (X direction) in FIG. I have.

  Next, in step S3, the dominant area calculation unit 13 calculates the load of the building 2 as an even load so as to evenly distribute the load of the building 2 over the basic pressure-resistant panel 3 of the arrangement regions R1 and R2, The dominant area S borne by the book is calculated.

  Thereafter, in step S4, the inter-pile distance calculation unit 14 calculates the maximum distance between the piles in the XY directions in the range of the dominant area S by stress calculation.

  Next, in step S5, the pile-dominated region setting unit 15 sets a square-shaped pile-dominated region D (D1, D1) having a side length along each of the XY directions from the maximum distance between the piles calculated in step S4 in the controlled area S. D2) is set (see FIGS. 5A and 5B).

  In step S6, the internal pile setting unit 16 calculates the arrangement and the number of the piles 4 by arranging the pile dominant areas D along the XY directions without any gap in the internal area Ra of each of the arrangement areas R1 and R2. Specifically, first, it is assumed that the dominant area S calculated by the inter-pile distance calculation unit 14 is a square. Then, as shown in FIG. 3, the internal pile setting unit 16 sets the maximum distance L1 between the piles in the first direction in which the span between the piles in the X direction of the arrangement region R is equal to or less than the side length of the dominant area S of the square. . Similarly, the maximum distance L2 between the piles in the second direction in which the span between the piles in the Y direction of the arrangement region R is equal to or less than the dominant area S is set.

  Subsequently, in step S7, in the outer pile setting unit 17, in the outer area Rb of each of the arrangement areas R1 and R2, the arrangement of the pile 4 and the arrangement of the pile 4 in the range of the dominant area S set in the inner area Ra. Calculate the number.

  Thereafter, in step S8, in the pile number determination unit 19, the pile number calculated by the internal pile setting unit 16 and the external pile setting unit 17 satisfies the required pile number required in the arrangement region R of the whole building. Is determined. In step S8, if the calculated number of piles satisfies the required number of piles (step S8: Yes), the operation flow is completed, and if not (step S8: No), the process returns to step S4. Recalculated.

Next, the operation of the foundation groundwork design system and the pile placement optimization method according to the present embodiment will be described.
In the above-described embodiment, as shown in FIGS. 1 to 6, the pile control region D of the control area S calculated from the piles to be used is arranged on the basic pressure plate 3 of the arrangement region R of the building 2. Then, first, the arrangement and the number of the piles 4 in the inner region Ra of the arrangement region R are calculated, and thereafter, the arrangement and the number of the piles 4 in the outer region Rb of the arrangement region R can be calculated. This makes it possible to appropriately share the supporting force of the piles 4 with the basic pressure-resistant panel 3, so that the piles 4 can be arranged more optimally and the number of piles can be reduced.
As described above, in the present embodiment, the dominant area S of the pile 4 and the maximum distance between the piles obtained by the stress calculation are calculated for the foundation pressure plate 3, and it is not necessary to calculate for the foundation beam. The calculation can be performed without the base plan, and the design time can be shortened.

  Further, in the present embodiment, since the layout area partitioning portion 18 is provided, even if the plane of the building 2 is not rectangular, the rectangular layout area R can be divided from the plane. Thus, the pile control region D per one pile can be efficiently arranged in the divided square arrangement region R. Thereby, the piles 4 can be arranged more optimally, and the number of piles can be reduced.

  Further, in the present embodiment, the dominant area S calculated in the inter-pile distance calculating unit 14 is assumed to be a square, and the inter-pile span in the X direction in the placement region R is determined by the internal The maximum distance L1 between the first direction piles that is equal to or less than the side length of S is set, and the maximum distance L2 between the second direction piles where the span between the piles in the Y direction in the placement region R is equal to or less than the dominant area S is set. Therefore, the inter-pile spans in the XY directions can be arranged at the maximum distance, and the piles 4 can be arranged more optimally, and the number of piles can be reduced.

  In the present embodiment, the pile-to-pile distance calculating unit 14 calculates the maximum distance between the outer piles in the outer peripheral region Rc in the cross section of the foundation beam provided on the outer peripheral portion of the building by stress calculation. In addition, the outer pile control region can be set along the outer peripheral region Rc by setting the outer pile control region from the maximum distance between the outer piles in the outer region Rc. Therefore, the arrangement and the number of the piles 4 can be calculated based on the foundation beams 20 provided in the outer peripheral region Rc in addition to the basic pressure-resistant panel 3, so that the number of the piles 4 in the external region Rb can be reduced. The stakes can be arranged more optimally.

  Further, in the present embodiment, the piles 4 are automatically arranged at the respective vertices r1 of the outer peripheral region Rc, and thereafter, a process of determining the arrangement and the number of the piles 4 inside the side r2 of the outer peripheral region Rc is performed. It will be. Therefore, the processing amount (calculation amount) performed by the external pile setting unit 17 can be reduced, the time required for processing can be reduced, and the design time can be shortened.

  In addition, since the basic groundwork design system 1 of the present embodiment includes the pile number determination unit 19, the optimized pile number calculated by the basic groundwork design system 1 is required in the arrangement region R of the entire building. By comparing the required number of piles, the number of piles 4 and the appropriateness of the arrangement mode can be determined. Therefore, the number of piles 4 is not unnecessarily increased, and optimization can be achieved even when the number of piles 4 is smaller than the required number.

  According to such a foundation groundwork design system and the pile placement optimization method, the number and placement of piles can be further optimized, and the design time can be reduced.

  As mentioned above, although the embodiment of the foundation groundwork design system and the method of optimizing the pile arrangement according to the present invention has been described, the present invention is not limited to the above-described embodiment, and does not depart from the gist thereof. It can be changed as appropriate.

  For example, in the present embodiment described above, when setting the building placement area, the placement area partitioning section 18 is provided, and the plurality of square placement areas R1 and R2 are partitioned from the plan view of the building 2. However, the present invention is not limited to dividing the plan view into a quadrangular section, and the arrangement area dividing section 18 and the step of dividing may be omitted. As described above, when the division is not performed, the arrangement area may not be a quadrangle shape. In this case, the optimal pile is arranged by arranging the dominant area of the pile with respect to the arrangement area in the same procedure as in the above embodiment. Can be calculated.

  Further, in the present embodiment, when calculating the arrangement and the number of the piles in the external region Rb, a means for arranging the piles in the outer peripheral region Rc is employed, but the present invention is not limited to this. Further, when arranging the piles in the outer peripheral area Rc, the processing is not necessarily limited to the processing of arranging the piles at each vertex r1 of the outer peripheral area Rc.

  In addition, it is possible to appropriately replace the components in the above-described embodiment with known components without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Basic groundwork design system 2 Building 3 Basic pressure board 4 Pile 11 Information storage part 12 Arrangement area setting part 13 Dominant area calculation part 14 Pile distance calculation part 15 Pile control area setting part 16 Internal pile setting part 17 External pile setting part 18 Arrangement area partitioning section 19 Number of piles judging section D Pile control area D1 First pile control area D2 Second pile control area R Arrangement area R1 First arrangement area R2 Second arrangement area Ra Internal area Rb External area Rc Outer area r1 Vertex r2 side S controlled area S1 first controlled area S2 second controlled area

Claims (7)

A foundation groundwork design system for determining the foundation of a building and the placement of piles,
An information storage unit that stores pile design information of the load, the floor plan, the foundation section, and the ground data of the building,
An arrangement area setting unit that sets an arrangement area of the pile from the plan view of the building,
A dominant area calculation unit that calculates a dominant area that is calculated as a leveling load so as to evenly distribute the load of the building over the entire basic pressure panel of the placement area, and calculates a dominant area that is borne by one selected pile.
In the range of the dominant area, a pile-to-pile distance calculation unit that calculates the maximum distance between piles in two directions orthogonal to each other by stress calculation,
In the control area, a pile control area setting unit that sets a square pile control area having a side length along each of the two directions from the maximum distance between the piles,
In the internal area of the arrangement area, an internal pile setting unit that calculates the arrangement and the number of piles by arranging the pile dominant areas along the two directions without gaps,
In the outer region excluding the inner region in the arrangement region, an outer pile setting unit that calculates the arrangement and number of piles in the range of the arrangement state and the dominant area of the pile set in the inner region,
A basic groundwork design system characterized by comprising:   2. The basic groundwork design system according to claim 1, further comprising an arrangement area partitioning section that divides the plurality of arrangement areas into a square shape from the plan view of the building. 3. In the inter-pile distance calculation unit, assuming that the calculated dominant area is a square,
In the internal pile setting unit, a maximum distance between piles in the first direction in which a span between piles in the first direction in one of the two directions in the placement area is equal to or smaller than a side length of the dominant area of the square is set. 3. The foundation groundwork design system according to claim 1, wherein a maximum distance between piles in the second direction is set such that a span between piles in the other second direction in the placement area is equal to or smaller than the dominant area. 4. In the inter-pile distance calculation unit, in the cross section of the foundation beam provided in the outer peripheral portion of the building, calculate the maximum distance between the outer peripheral piles in the outer peripheral region by stress calculation,
In the pile governing region setting unit, in the governing area, a rectangular outer peripheral pile governing region having a side length along each of the two directions is set from the maximum distance between the peripheral piles in the outer peripheral region,
4. The foundation groundwork design system according to claim 1, wherein the outer pile setting unit calculates the arrangement and the number of piles by arranging the outer peripheral pile dominating areas along the outer peripheral area. 5.   In the outer pile setting unit, first, a pile is arranged at each vertex of the outer peripheral area, and then, by arranging the outer peripheral pile governing area inside a side of the outer peripheral area, the arrangement of the piles of the entire outer peripheral area and The basic groundwork design system according to claim 4, wherein the number is calculated.   A pile number determination unit that determines whether the number of piles calculated by the internal pile setting unit and the external pile setting unit satisfies the required number of piles required in the placement area as the whole building. The foundation groundwork design system according to any one of claims 1 to 5. A method of optimizing a pile arrangement in which a pile is optimally arranged in the arrangement area using the foundation groundwork design system according to any one of claims 1 to 6,
A step of storing the pile design information of the load, the floor plan, the foundation section, and the ground data of the building,
Setting a placement area of the pile from the plan view of the building,
A step of calculating as a leveling load so as to evenly distribute the load of the building over the entire basic pressure panel of the placement area, and calculating a dominant area borne by one selected pile;
In the range of the controlled area, a step of calculating the maximum distance between the piles in the two directions by stress calculation,
In the dominant area, a step of setting a square-shaped pile governing region having a side length along each of the two directions set from the maximum distance between the piles,
In the internal region of the arrangement region, a step of calculating the arrangement and the number of piles by arranging the pile dominant region without a gap along the two directions,
In the outer region excluding the inner region in the arrangement region, a step of calculating the arrangement and the number of piles in the range of the arrangement state and the dominant area of the piles set in the inner region,
A method for optimizing the arrangement of piles, comprising:

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