JP5953172B2 - Outdoor structure foundation structure - Google Patents

Description

  The present invention relates to an outdoor structure foundation structure that prevents liquefaction damage below the ground surface.

  The ground liquefaction phenomenon occurs in a wide area in the event of a large earthquake or a huge earthquake. Elucidation of the mechanism of the liquefaction phenomenon and countermeasures are very difficult because it depends on the ground conditions and the scale of the earthquake. In buildings such as houses, the most scary thing about earthquakes is the magnitude of shaking rather than vibration, which causes damage to buildings. For this reason, building strong structures with improved structural performance, such as earthquake resistance, seismic control, and seismic isolation, is progressing. However, for shallow ground where small structures such as houses are constructed, earthquake countermeasures are hardly taken. In the planned construction sites such as houses, the ground strength is investigated and the ground is improved for the soft ground, but the countermeasures against liquefaction are almost impossible.

  In JP-A-57-209334, a foundation pile is placed at a predetermined position, and then gravel is spread on the upper portion of the foundation pile, and then a footing is constructed on the gravel layer in a state of being disconnected from the foundation pile. A structure foundation construction method (claim 1) is disclosed. Further, in the lower right column, lines 10 to 12 of JP-A-57-209334, “The gravel wall filled between the foundation piles and the upper gravel layer are connected in series as in the embodiment. Therefore, the increase in pore water pressure is prevented. "

  In addition, when the planned construction site of an outdoor structure such as a small-scale private house is soft ground, improvement of the impervious ground in the shape of a rice field, for example, as shown in FIG. 9 near the foundation construction part that is the soft ground. There is known a shallow ground improvement method for constructing the wall 100 and suppressing uneven settlement of the ground (for example, Japanese Patent Laid-Open Nos. 2004-60290 and 2009-275358). Moreover, the permeable vertical pile which the upper end constructed | assembled in a ground connects to a permeable layer is described in Unexamined-Japanese-Patent No. 10-18314, Unexamined-Japanese-Patent No. 55-142815, etc., for example.

  In addition, the applicant of the present invention, first, the base portion of the outdoor structure, the continuous outer wall forming the outer periphery, which is constructed below the base portion and on the shallow ground, and the inner side surrounded by the outer wall A continuous improvement wall in an impermeable ground consisting of an inner wall that divides a plurality of chambers, a water permeable layer constructed over the entire surface between the foundation and the continuous improvement wall in the impermeable ground, and a plurality of walls divided by the inner wall An invention relating to an outdoor structure foundation structure having an permeable vertical pile connected to the permeable layer, which is constructed on at least one ground of a room, has been filed (Japanese Patent Application 2012). -39890).

JP-A-57-209334 JP 2004-60290 A JP 2009-275358 A Japanese Patent Laid-Open No. 10-18314 JP-A-55-142815

  However, Japanese Patent Application Laid-Open No. 57-209334 does not disclose a continuous impermeable wall in an impermeable ground. Moreover, the conventional impermeable underground continuous improvement wall such as JP-A-2004-60290 is in direct contact with a foundation such as a solid foundation, and a permeable layer is interposed between the underground continuous improvement wall and the foundation. It is not disclosed until it is made to. For this reason, in order to reduce the liquefaction damage in the foundation structure where a permeable layer is interposed between the underground continuous improvement wall and the foundation part, the number of replacements of the local soil has been reduced to reduce residual soil disposal. The minimum necessary permeable layer layout design was not done.

  Accordingly, an object of the present invention is to provide an outdoor structure foundation structure that reduces liquefaction damage and reduces the number of local soil replacements to reduce residual soil disposal.

  In such a situation, as a result of intensive studies, the present inventor constructed a permeable layer between the foundation portion of the outdoor structure and the continuously improved wall in the impermeable ground, and the permeable layer is formed on the partial inner wall. An outdoor structure foundation structure constructed so that a plurality of chambers defined by the inner wall communicate with each other and have one end extending on the outer wall by making the width dimension larger than the width dimension of the partial inner wall. Then, while reducing liquefaction damage and reducing the number of local soil replacements, it was found that the disposal of residual soil can be reduced, and the present invention has been completed.

  That is, the present invention includes a foundation part of an outdoor structure, a continuous outer wall that forms an outer periphery, which is constructed on a shallow ground below the foundation part, and a plurality of chambers surrounded by the outer wall. A continuous improvement wall in the impermeable ground consisting of an inner wall divided into an inner wall, and a water permeable layer constructed between the foundation and the continuous improvement wall in the impermeable ground. The inner wall is constructed so that the two chambers defined by the inner wall communicate with each other and have one end extending on the outer wall by making the width dimension larger than the width dimension of the partial inner wall. An outdoor structure foundation structure characterized by the above is provided.

  According to the present invention, it is possible to reduce liquefaction damage, reduce the number of local soil replacements, and reduce residual soil disposal.

It is a top view of the outdoor structure basic structure in the 1st Embodiment of this invention. Is a view taken along the _X 1 -X ₁ line in FIG. Is a view taken along the _Y 1 -Y ₁ line in FIG. Is a view taken along the _Z 1 -Z ₁ line in FIG. It is a top view of the outdoor structure foundation structure in the 2nd Embodiment of this invention. Is a view taken along the _X 2 -X ₂ line in FIG. 5. Is a view taken along the _Y 2 -Y ₂ line in FIG. 5. Is a view taken along the _Z 2 -Z ₂ line in FIG. 5. It is a perspective view of the conventional impermeable ground continuous improvement wall.

  An outdoor structure foundation structure (hereinafter also simply referred to as a “foundation structure”) according to a first embodiment of the present invention will be described with reference to FIGS. The foundation structure 10 includes a foundation portion 1 of an outdoor structure, and a continuous improvement wall (hereinafter simply referred to as an “improvement wall”) having a plurality of chambers that are below the foundation portion and are constructed on a shallow ground. 2) and a water permeable layer 3 constructed between the base portion 1 and the improved wall 2, and the water permeable layer 3 is larger than the width dimension of the part of the inner wall 211 on the part of the inner wall 221. Thus, the plurality of chambers defined by the inner wall 22 are communicated with each other, and one end is positioned on the outer wall 21. In addition, since FIG. 1 described the arrangement | positioning relationship of the improvement wall 2 and the water-permeable layer 3 intelligibly, the base part 1 was drawn simply with the dashed-two dotted line.

  In the foundation structure 10, the improved wall 2 is constructed on the shallow ground below the foundation portion 1, and includes a continuous outer wall 21 that forms the outer periphery and a plurality of chambers surrounded by the outer wall 21. It is an improved soil quality obtained by stirring and mixing a cement-based solidified material composed of an inner wall 22 divided into two. The improved wall 2 prevents uneven settlement and can counter horizontal forces such as earthquakes. The partition shape in which the inner side surrounded by the outer wall 21 is partitioned by the inner wall 22 is not particularly limited, and examples thereof include a lattice shape and an indefinite shape having a rectangular chamber at the center. In the case of a grid, the number of rooms partitioned in a grid by vertical and horizontal walls is, for example, 2 or more, preferably about 4 to 12, in the case of a small-scale house. 1 to 4 show 20 examples, but this is increased in order to explain the installation form of the water permeable layer 3 in one drawing. The improved wall 2 may have an indefinite shape having a rectangular chamber (partition) at the center. Examples of the shape of the improved wall 2 in plan view include vertically symmetric, left-right symmetric, and asymmetric shapes. Among these, the vertically symmetric and left-right symmetric shapes are preferable in that the ground is evenly restrained.

  The improved wall 2 has the outer wall 21 as a continuous wall and the inner wall 22 defines the inner wall 22 to constrain and integrate the ground, and to uniformly transmit the load of the outdoor structure to the ground via the foundation 1. In addition, the foundations of structures such as buildings and ground strength are improved, and the stability of the entire outdoor structure is increased. In the present invention, the height of the improved wall 2 is a maximum of 2.0 m, generally 0.3 to 1.8 m.

In the foundation structure 10, examples of the outdoor structure include a small house, a store, a building such as a factory, a garden, a private road, or a parking lot. A small house, a small building as defined in the "small-scale building foundation design guidelines (Architectural Institute of Japan)", three floors below, building height 13m below, eaves height 9m or less and a total area of 500m ² A building that satisfies the following conditions. The foundation of the outdoor structure is, for example, a solid foundation in a small-scale house, and an asphalt pavement layer in the case of a large-area outdoor structure such as a store, a factory, a garden, a private road, or a parking lot. 1-4 is a case of a small-scale house, The solid foundation 1 is formed on the improvement wall 2 which has the water-permeable layer 3 in part.

  In the foundation structure 10, the water permeable layer 3 is constructed at a part between the foundation portion 1 and the improved wall 2. That is, the water permeable layer 3 has a width dimension larger than the width dimension of the part of the inner wall 221 on the part of the inner wall 221, thereby allowing a plurality of chambers defined by the inner wall 22 to communicate with each other and having one end on the outer wall. 21, that is, it is constructed so as to be substantially located at the outer end of the outer wall 21. That is, the water permeable layer 3 is formed so as to be incorporated into a part of the improved wall 2 in appearance. In addition, in the foundation structure 10, the form in which the two chambers in which the water permeable layer 3 is partitioned by the inner wall communicates with each other is the water permeable layer 3 c in FIG. 1, including the intersection of the inner walls, and at least three that are partitioned by the inner wall. The water-permeable layers that allow the chambers to communicate are 3a, 3b, 3d, and 3e in FIG.

An example of such a water-permeable layer 3 will be described with reference to FIG. The water permeable layer 3 a is formed by forming a water permeable layer having a width dimension w ₂ larger than the width dimension w ₁ of the inner wall 221 on the inner wall 221 having a substantially L shape in plan view. The substantially L-shaped inner wall 221 includes a wall that divides the chamber a and the chamber b, a wall that divides the chamber e and the chamber f, a wall that divides the chamber e and the chamber i, and a portion that divides the chamber i and the chamber j. A wall, a part of the wall that divides the room j and the room f, a part of the wall that divides the room f and the room b, and a continuous wall including the intersections thereof. In addition, one end 31 a and the other end 32 a of the substantially L-shaped inner wall 221 extend substantially to the outer end of the outer wall 21. The upper surface of the water permeable layer 3a is flush with the upper surface of the improved wall 2 where the water permeable layer 3 is not formed (see FIG. 2). Further, the height (depth) of the water permeable layer 3 a is smaller than the height of the improved wall 2. For this reason, the height of the improvement wall 2 which hits the lower part of the water-permeable layer 3a is low by the height of the water-permeable layer 3a. Such a water-permeable layer 3 a communicates the six chambers a, b, e, f, i, and j defined by the inner wall 221.

In the water permeable layer 3b, the same components as those of the water permeable layer 3a are denoted by the same reference numerals, description thereof is omitted, and only different points will be described. That is, the water permeable layer 3 b is formed by forming a water permeable layer having a width dimension w ₂ larger than the width dimension w ₁ of the inner wall 222 on the substantially L-shaped inner wall 222. The substantially L-shaped inner wall 222 divides the chamber g and the chamber r, the wall that divides the chamber g and the chamber m, the partial wall that divides the chamber n and the chamber r, and the chamber m and the chamber n. It is a continuous wall connecting some walls and their intersections. Further, the one end 31 b and the other end 32 b of the substantially L-shaped inner wall 222 extend substantially to the outer end of the outer wall 21. Such a water permeable layer 3 b communicates the four chambers m, n, q, and r defined by the inner wall 222.

In the water permeable layer 3c, the same components as those of the water permeable layer 3a are denoted by the same reference numerals, description thereof will be omitted, and only different points will be described. That is, permeability layer 3c is to plan view on the inner wall 223 of a substantially I-shape, to form a water-permeable layer of a large width dimension w ₂ than the width w ₁ of the inner wall 223. The inner wall 223 is a wall that partitions the chamber d and the chamber c. One end 31 c of the inner wall 223 extends substantially to the outer end of the outer wall 21, and the other end 32 c is located on the inner wall 223. Such a water permeable layer 3 c communicates the two chambers c and d defined by the inner wall 223.

In the water permeable layer 3d, the same components as those of the water permeable layer 3a are denoted by the same reference numerals, description thereof is omitted, and only different points will be described. That is, permeability layer 3d is to plan view on the inner wall 224 of a substantially L-shape, to form a water-permeable layer of a large width dimension w ₂ than the width w ₁ of the inner wall 224. The inner wall 224 includes a wall that divides the chamber h and the chamber l, a wall that divides the chamber k and the chamber l, a part of the wall that divides the chamber g and the chamber k, a part of the wall that divides the chamber g and the chamber h, and It is a continuous wall that includes those intersections. One end 31 d of the inner wall 224 extends substantially to the outer end of the outer wall 21, and the other end 32 d is located on the inner wall 224. Such a water permeable layer 3 d communicates the four chambers g, h, k, and l defined by the inner wall 224.

In the water permeable layer 3e, the same components as those of the water permeable layer 3a are denoted by the same reference numerals, description thereof will be omitted, and only different points will be described. That is, permeability layer 3e is to plan view on the inner wall 225 of a substantially L-shape, to form a water-permeable layer of a large width dimension w ₂ than the width w ₁ of the inner wall 225. The inner wall 225 includes a wall that divides the chamber s and t, a wall that divides the chamber t and the chamber p, some walls that divide the chamber s and the chamber o, some walls that divide the chamber o and the chamber p, and It is a continuous wall that includes those intersections. In addition, one end and the other ends 31 e and 32 e of the inner wall 225 extend substantially to the outer end of the outer wall 21. Such a water-permeable layer 3e communicates the four chambers o, p, s, and t defined by the inner wall 225.

  In the foundation structure 10, the water permeable layer 3 has a function of draining the outside of the building through the rising water that rises due to excessive pore water pressure accompanying liquefaction. Examples of the water permeable layer 3 include a crushed stone layer, a chestnut stone layer, and a gravel layer. That is, the water-permeable layer 3 allows the rising water to pass through the sand flow, which is the rising water containing sandy soil, but does not allow the earth and sand to pass. The height of the water permeable layer 3 is appropriately determined depending on the height of the above function, but is approximately 10 to 50 cm.

  Thus, the foundation structure 10 can control the rise (directionality) of the sand flow that is the rising water containing sandy soil when a large earthquake or liquefaction occurs. The sand flow caused by liquefaction usually does not occur in the entire area of the improved wall, but occurs in a part of it. For example, as shown by the arrows in FIG. 2, the sand flow generated in any one of the chambers a, b, e, f, i, j, or near them, loses its escape when it reaches near the ground surface. Passes through the water-permeable layer 3a, diffuses in the six chambers, is guided in the horizontal direction, and is discharged to the outside of the improved wall. In this case, since the outflow of earth and sand is blocked by the water-permeable layer 3a, the indoor ground is protected and liquefaction damage can be suppressed. More preferably, the ascending water guided to the outside of the improved wall flows to the sewer.

  In addition, for example, when the sand flow generated in one or more of the chambers m, n, g, and r reaches near the ground surface, it loses its escape, and water passes through the permeable layer 3b and diffuses in the four chambers. At the same time, it is guided in the horizontal direction and discharged to the outside of the improved wall. In this case, since the outflow of earth and sand is blocked by the water-permeable layer 3b, the indoor ground is protected and liquefaction damage can be suppressed.

  Further, for example, when the sand flow generated in one or both of the chambers c and d reaches near the ground surface, it loses its escape, and the water diffuses through the two permeable layers 3c and in the horizontal direction. Is discharged to the outside of the improved wall. In addition, for example, when the sand flow generated in any one of the chambers g, h, k, l or a plurality of the locations reaches near the ground surface, it loses its escape, and the water passes through the permeable layer 3d and passes through the four chambers. As it diffuses, it is guided horizontally and discharged outside the modified wall. Further, for example, when the sand flow generated in any one of the chambers o, p, s, and t, or near the ground surface, near the ground surface, it loses a refuge, and the water passes through the permeable layer 3e in the four chambers. As it diffuses, it is guided horizontally and discharged outside the modified wall.

  According to the foundation structure 10, liquefaction damage is reduced, and compared to the case where a permeable layer is formed on the entire surface of the foundation portion 1 and the improved wall 2, the number of local soil replacements is reduced and the disposal of residual soil is reduced. it can.

  Next, the basic structure in the 2nd Embodiment of this invention is demonstrated with reference to FIGS. In the basic structure 10a of FIGS. 5-8, the same code | symbol is attached | subjected to the same component as the basic structure 10 of FIGS. 1-4, the description is abbreviate | omitted and a different point is mainly demonstrated. That is, the difference between the foundation structure 10a and the foundation structure 10 is that the upper end is connected to the permeable layer and the permeable vertical pile 4 extending downward is formed, and the permeable layer 3 portion where the permeable vertical pile 4 is formed. Is to widen. In addition, in this invention, the widening of the water-permeable layer part in which a water-permeable vertical pile is formed is not essential, but is an arbitrary component.

  In the foundation structure 10a, the water permeable layer 3f is a water permeable layer 3a in which the intersections of the inner walls that define the chambers a, b, e, and f are widened and the permeable vertical piles 4 are formed at the intersections. It is. In the permeable layer 3b, the permeable layer 3g is formed by widening the intersection part of the inner wall that partitions the chambers m, n, q, and r, and the permeable vertical pile 4 is formed at the intersection part. In the water permeable layer 3c, the water permeable layer 3h is formed by widening the substantially central portion of the inner wall that divides the chambers c and d, and the permeable vertical pile 4 is formed in the widened portion. The water permeable layer 3i is a water permeable layer 3d in which the central portion of the inner wall that divides the chambers k and l is widened and the permeable vertical pile 4 is formed in the widened portion. The water permeable layer 3j is a water permeable layer 3e in which the central portion of the inner wall that divides the chambers s and t is widened, and the water permeable vertical piles 4 are formed in the widened portion.

  In the foundation structure 10a, the permeable vertical pile 4 has an upper end connected to the permeable layer 3 and extends downward beyond the improved wall 2 in the depth direction. The permeable vertical pile 4 has a function of absorbing excess pore water pressure accompanying liquefaction and guiding ascending water to the permeable layer 3. That is, the water-permeable vertical pile 4 allows the rising water to pass through the sand flow that is the rising water containing sandy soil, but does not allow the earth and sand to pass. Examples of the permeable vertical pile 4 include a crushed stone pile, a gravel pile, and a perforated pipe pile. The perforated pipe pile is formed by forming a large number of through holes on the peripheral surface of a pipe that penetrates vertically. The through hole prevents the intrusion of earth and sand into the pipe, while allowing the rising water to pass through. Moreover, the deep end side of the perforated pipe pile is clogged with earth and sand and closes the front end opening. This is because when the pipe is driven into the ground, earth and sand enter. And the inside of the pipe excluding the tip of the pipe may be hollow or crushed stone may be clogged. As the pipe, a steel pipe, a vinyl chloride pipe, or the like can be used.

  Although the depth (height) of the permeable vertical pile 4 cannot be determined unconditionally depending on the geology of the ground, it is not necessary to make it as deep as conventional crushed stone piles for the purpose of ground reinforcement. The wall depth (height) of the improved wall is 3 times, preferably 2 times, specifically 4 m at maximum, preferably 3 m at maximum, particularly preferably 2.5 m at maximum. Further, in the case of a ground having a good ground layer that is not liquefied or a liquid ground layer mixed with sand in the depth direction from the ground surface, it is only necessary that the lower end of the permeable vertical pile 4 reaches the liquid ground layer. If it is such a water-permeable vertical pile 4, an excess pore water pressure accompanying liquefaction can be absorbed in a liquid ground layer, and ascending water can be guide | induced to the water-permeable layer 3. FIG. That is, since a water permeable layer is provided in a part of the foundation structure 10a and the foundation, and the water permeable layer and the water permeable vertical pile 4 are connected, rising water accompanying liquefaction affects the good ground in the good ground. However, since it rises while securing a vertical route, and then flows in the horizontal direction and drains in the four directions around the building, the pressure can be reduced quickly and liquefaction damage can be prevented. Moreover, since the permeable vertical pile 4 itself becomes an improved pile of soft ground, an effective pile effect is expressed even for ground subsidence after an earthquake.

  The formation position of the water permeable vertical pile 4 is not limited to the above position, and may be anywhere as long as it is a position connected to the water permeable layer 3. A plurality may be formed. Moreover, as a cross-sectional shape of the permeable vertical pile 4, in addition to a circular cross section, a rectangular cross section, a rectangular cross section, an inverted trapezoidal cross section that is slightly tapered in the depth direction, an elliptical cross section, and a part of two circles A cross section in which the circles overlap, a cross section in which a part of three circles overlap, an indefinite cross section, and the like.

  Next, an example of a method for creating the foundation structure 10a will be described. First, the permeable vertical pile 4 is constructed at a predetermined position. The water-permeable vertical pile 4 can be formed by filling a crushed stone or the like after excavation to a predetermined depth with a small excavation machine such as a Yumbo or a deep excavation machine. In addition, it is preferable to grasp | ascertain the depth of a liquid ground beforehand by a geological survey as a pre-stage which constructs the water-permeable vertical pile 4. FIG. Thereby, the depth (height) of the water-permeable vertical pile 4 can be determined. Next, the soil having a flat area of the water permeable layer and having a height of the water permeable layer 3 is removed at a place where the water permeable layer is to be constructed (sowing step). At the time of scraping, the head of the permeable vertical pile 4 may be scraped off, or a part or all of it may be left. If a part or all of the head of the water-permeable vertical pile 4 remains, connection with the water-permeable layer 3 will become easy. Next, for example, a groove having a shape shown in FIG. 9 is formed in the ground (soft ground) where the improved wall 2 is to be created. At this time, the grooves are formed while paying attention to the positional relationship between the outer wall 21 and the inner wall 22 of the improved wall 2 and the scraping portion. Next, the improved soil obtained by stirring and mixing the cement-based solidified material in the groove is backfilled. After that, the improved soil part is rolled with a rammer or the like to construct an improved wall made of improved soil having soil strength and toughness. Next, the permeable layer 3 is constructed by performing crushed stone, chestnut stone, or gravel land in the recess on the upper surface of the improved wall 1. Accordingly, the water permeable layer 3 is connected to the water permeable vertical pile 4 and has a predetermined thickness, and the upper surface of the water permeable layer 3 and the upper surface of the improved wall 2 are substantially flush and appear on the ground surface. . Next, on the permeable layer 3, for example, as a foundation, concrete that is a solid foundation is placed to complete the creation of the foundation structure 10.

  The creation method of the foundation structure 10 may be performed in the same direction except that the step of creating the permeable vertical pile 4 is omitted in the creation method of the foundation structure 10a.

  In the foundation structure 10a, when liquefaction occurs in the liquid ground layer, the permeable vertical pile 4 can absorb the excess pore water pressure accompanying liquefaction and guide the rising water to the permeable layer 3. The rising water rises while maintaining the vertical route which is the permeable vertical pile 4 in the good ground, and then flows horizontally in the permeable layer 3 and drains outside the building. For this reason, pressure reduction can be achieved early and liquefaction damage can be prevented. Moreover, since the permeable vertical pile 4 itself becomes an improved pile of soft ground, an effective pile effect is expressed even for ground subsidence after an earthquake. In addition, in the foundation structure 10a, as with the foundation structure 10, compared to the case where a water permeable layer is formed on the entire surface of the foundation portion 1 and the improved wall 2, the number of replacements of the local soil is reduced and the residual soil disposal is reduced. it can.

  In addition, when the outdoor structure has a large area such as a store, factory, private road, garden or parking lot, as a method of partitioning the improved wall with the inner wall, a large number of tens to hundreds of rooms are arranged in a lattice shape. Examples thereof include a forming method, a plurality of arranging methods in which the improved wall 1 is one unit, a plurality of arranging units arranged side by side, or a plurality of mixed arranging methods in which a plurality of the units and different units are arranged in combination. When the outdoor structure has a large area, the number of rooms that divide the improved wall by the inner wall 2 is naturally larger than that of a small-scale house.

  According to the present invention, it is possible to reduce liquefaction damage, reduce the number of local soil replacements, and reduce residual soil disposal. Moreover, according to this invention, the excess pore water pressure accompanying liquefaction can be drained under reduced pressure through the water-permeable layer partially constructed by absorbing the water-permeable vertical piles. For this reason, liquefaction damage can be prevented.

DESCRIPTION OF SYMBOLS 1 Foundation part 2 Impermeable continuous underground improvement wall 3, 3a-3j Permeable layer 4 Permeable vertical pile 10, 10a Outdoor structure foundation structure

Claims (9)

The foundation of the outdoor structure,
Impervious underground continuous improvement wall comprising a continuous outer wall forming an outer periphery and an inner wall that divides the inner side surrounded by the outer wall into a plurality of chambers, which is constructed on the shallow ground below the foundation. When,
A permeable layer constructed between the foundation and the continuous improvement wall in the impermeable ground,
The water permeable layer has a width dimension larger than the width dimension of the partial inner wall on the partial inner wall so that the two chambers defined by the inner wall communicate with each other, and one end of the permeable layer is disposed on the outer wall. An outdoor structure foundation structure constructed so as to extend.   The outdoor structure foundation structure according to claim 1, wherein the partial inner wall includes an intersection of the inner walls, and the water permeable layer communicates at least three chambers defined by the inner wall.   The outdoor structure foundation structure according to claim 1 or 2, further comprising a water permeable vertical pile having an upper end connected to the water permeable layer.   The outdoor structure foundation structure according to claim 1, wherein the inner wall is divided into a lattice shape on the inner side surrounded by the outer wall. Translucent aqueous Tatekui is crushed stone pile, outdoor structure foundation structure according to claim 3 Symbol mounting, characterized in that a gravel pile or perforated pipe piles.   The outdoor structure foundation structure according to any one of claims 1 to 5, wherein the water permeable layer is a crushed stone layer, a chestnut stone layer, or a gravel layer. The outdoor structure foundation structure according to claim 3 or 5, wherein the permeable vertical pile extends downward in the depth direction beyond the continuously improved wall in the impermeable ground. 該屋outer structures, buildings, outdoor structure foundation structure according to any one of claims 1 to 7, garden EMMA other is characterized by a parking lot.   9. The outdoor structure foundation structure according to claim 8, wherein the foundation portion is a solid foundation when the outdoor structure is a building.

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