JP2010065496A - Foundation for post - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foundation for a post minimizing the generated quantity of surplus soil, easy to construct and reusable separated from a fence body (the post). <P>SOLUTION: The foundation 2 for the post has a body divided piece 40a provided with a bottom plate and side plates forming three faces and provided with an upper strip member 50a and a lower strip member 60a fixed straddling the facing side plates, and a body divided piece 40a provided with an upper strip member 50b and a lower strip member 60b. The upper strip member 50a and the upper strip member 50b are connected by a bolt 8b, and an intermediate part of the post 9 is gripped between both members. The lower strip member 60a and the lower strip member 60b are connected by a bolt 8b, and a lower end of the post 9 is gripped between both members. Excavated soil is backfilled in a hollow body 400 of square pole shape formed by the body divided piece 40a and the body divided piece 40b by such a connection. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a supporting foundation, and more particularly to a supporting foundation for fixing a supporting pillar embedded in soil.

  Conventionally, safety fens for preventing crossing (hereinafter referred to as “fence bodies”) installed at the boundaries of walking paths and median strips, and fence bodies for preventing falls from being installed in dangerous locations such as rivers and waterways The fences mainly used for landscapes installed in parks and bicycle parking lots were fixed to concrete block foundations in which the struts were embedded in the soil. Such a concrete block foundation was precast (pre-made) with a fixed post, or concrete was cast on a formwork made at a construction site (for example, see Non-Patent Document 1).

"Guard fence installation standards / comments (revised version), January 1990" Japan Road Association, issued January 31, 2008 (p. 74, Table 3/4/1)

The installation standard described in Non-Patent Document 1 is based on the embedding in the soil and regulates the consolidation size, so the concrete block foundation is formed in a shape that satisfies the consolidation size. Has been.
In order to embed the concrete block foundation in the soil, it is necessary to excavate the construction site to eliminate at least the same volume of soil as the concrete block foundation, that is, to remove at least the same volume of residual soil as the concrete block foundation. Had to be disposed of. For this reason, there has been a problem that costs for disposing of the remaining soil are incurred.
In addition, when the concrete block foundation is made by placing concrete on a formwork made at a construction site, there is a problem that time and cost are required for making the formwork, placing concrete, and curing.
Furthermore, when the fence body is replaced due to deterioration (corrosion, damage, etc.) or rearrangement of the layout, there is a problem that the concrete block foundation is also discarded as industrial waste in the same manner as the fence body.

  The present invention solves the above-described problem, and provides a foundation for a support column that can minimize the generation of residual soil, can be easily constructed, and can be separated from a fence (post) and reused. For the purpose.

(1) A support foundation according to the present invention includes a main body that is installed in a drilling hole and is formed in a hollow quadrangular prism shape with an open upper surface;
Upper holding means that is arranged near the upper end of the main body and holds the middle part of the column to be installed;
A lower holding means that is disposed near the bottom plate of the main body or near the bottom plate and holds the lower end of the column, and
In the state where the support column is held by the upper holding means and the lower holding means, all or part of excavated soil excavated when forming the excavation hole is backfilled inside the main body. And

(2) In the above (1), the upper holding means is a plate member that has a strut through-hole that is movably abutted against a part of the inner peripheral surface of the main body and through which the strut can pass,
The lower holding means is a plate or tube fixed to the bottom plate of the main body and in contact with the outer peripheral surface or inner peripheral surface of the support column.

(3) In (1), the upper beam and the lower beam are fixed across the opposing side plates of the main body,
The upper holding means is formed from the upper beam and a U-shaped fastener installed on the upper beam,
The lower holding means is formed from the lower beam and a U-shaped fastener installed on the lower beam.

(4) In the above (1), the main body is formed by abutting a pair of main body divided pieces composed of a bottom plate and side plates forming three surfaces, and each of the pair of main body divided pieces includes: The connecting member is fixed across the opposing side plates,
The upper holding means and the lower holding means are formed by connecting a connecting member of the one main body divided piece and a connecting member of the other main body divided piece.
(5) In the above (4), a concave portion capable of accommodating a part of the support column is formed in the central portion of the connecting member.

(6) In the above (1), the main body is formed by abutting a pair of main body divided pieces composed of a bottom plate and side plates forming three surfaces, and each of the pair of main body divided pieces includes: The upper belt member and the lower belt member are fixed across the opposing side plates,
The upper holding means is formed by connecting the upper strip member of the one main body split piece and the upper strip member of the other main body split piece,
The lower holding means is formed by connecting a lower band member of the one main body division piece and a lower band member of the other main body division piece.
(7) In the above (6), a concave portion capable of accommodating a part of the support column is formed in the central portion of the upper strip member and the central portion of the lower strip member.

(8) In the above (1), the main body includes a rectangular bottom plate and a pair of main body divided pieces having a substantially U-shaped cross section, and is formed on both side edges of the pair of main body divided pieces. Forming a hollow quadrangular column by connecting the side plate flanges facing each other, and connecting the bottom plate to the hollow quadrangular column,
The upper holding means attaches a part of the column to the central part of the upper belt-like member in which a concave part capable of accommodating a part of the column is formed in the central part where both ends are held between the opposed side plate flanges. It is formed by installing an upper support grip member formed with a recess that can be stored,
The lower holding means is a plate member or a pipe member fixed to the bottom plate and abutting against an outer peripheral surface or an inner peripheral surface of the support column.

(I) The support foundation according to the present invention is in a state of being constructed, that is, in a state where the upper holding means holds the middle part of the support and the lower holding means holds the lower end part of the support, and is in the shape of a hollow square pillar. Since all or part of the excavated soil is backfilled inside the formed main body, the generation of residual soil can be suppressed to a minimum amount. Further, by removing the soil buried back in the main body, the strut can be renewed and the strut base itself can be recovered, so that it is not discarded as industrial waste.
In addition, when excavating the excavation hole in which the foundation for the column is installed back into the main body of the foundation for the column and when excavating the excavation hole in which one column foundation is installed There is a case where the generated soil is backfilled in the main body of the other pillar foundation.

(Ii) Further, the upper holding means is a plate material having a column through-hole that abuts against a part of the inner peripheral surface of the main body, and the lower holding means is a plate material or a tube material fixed to the bottom plate. The configuration is simple, and the effect (i) is achieved.
(Iii) Further, since the upper holding means is formed of the upper beam and the U-shaped fastener and the lower holding means is formed of the lower beam and the U-shaped fastener, it is possible to securely hold the column with a simple configuration. And has the effect (i).

(Iv) Since the main body is formed by abutting a pair of main body divided pieces to which the connecting member is fixed, the upper holding means and the lower holding means are formed by connecting the connecting members, and thus a simple configuration Thus, the support post can be securely gripped, and the effect (i) is achieved.
(V) Further, since the concave portion capable of accommodating a part of the support column is formed in the connecting member, the support of the support column is ensured and the accuracy of the position where the support column is arranged is improved.

(Vi) The main body is formed by abutting a pair of main body split pieces to which the upper band member and the lower band member are fixed, and the upper holding means is formed by connecting the upper band members, Since the lower holding means is formed by connecting the respective lower belt-like members, the main body at the time of storage and transportation can be reduced in size, and the column can be securely gripped with a simple configuration, There exists an effect of said (i).
(Vii) Moreover, since the recessed part which can accommodate a part of support | pillar is formed in an upper strip | belt-shaped member and a lower strip | belt-shaped member, while holding | maintaining a support | pillar becomes reliable, the precision of the position where a support | pillar is arrange | positioned improves.

  (Viii) Since it is composed of a bottom plate, a pair of main body split pieces, an upper strip member, and an upper support gripping member, and these are assembled at a construction site, when storing materials for a plurality of support foundations, While the bulk during transportation is greatly reduced, the column can be securely gripped, and the effect (i) is achieved.

[Embodiment 1: A type (integrated type)]
FIGS. 1A and 1B are explanatory views of a support foundation according to Embodiment 1 of the present invention, in which FIG. 1A is a perspective view, FIG. 1B is a sectional view in side view, FIG. 1C is a plan view, and FIG. Is a plan view with part removed. Each figure is shown schematically, and in particular, the thickness (plate thickness) of each member is exaggerated. Further, the present invention does not limit the shape and relative size of each member to those shown in the drawings.
In FIG. 1, the column base 1 is attached to the main body 10, the upper holding means 20 disposed near the upper end of the main body 10, the lower holding means 30 fixed to the bottom plate 13 of the main body 10, and the side plate 11 of the main body 10. And an upper holding means supporting member 12.
A part of the column 9 supported by the column base 1 is shown by a solid line in FIG. 1A and by a two-dot chain line in FIG.

(Main unit)
The main body 10 has a box shape (a rectangular parallelepiped) having an open top surface, which includes a bottom plate 13 and a side plate 11 having a rectangular shape in plan view. In addition, the present invention does not limit the formation procedure of the main body 10, and the bottom plate 13 having a rectangular shape in a plan view may be joined to a member that is bent in a rectangular shape in a plan view and joined to side edges. A rectangular plate member is joined to the front side and the back side of the front view, respectively, on a member folded in a U-shape when viewed from the front consisting of the bottom plate 13 and a pair of side plate portions facing each other across the bottom plate 13. May be.
Further, a through hole for draining water may be formed in the bottom plate 13 or the side plate 11, or a gap (for example, a range without a weld line) may be provided in a part of a joint portion between the bottom plate 13 and the side plate 11.

(Upper holding means)
The upper holding means 20 is a plate material having both ends formed in a substantially sagittal shape, and is recessed at a diagonal line position of the main body 10. The end portions 21 of the upper holding means 20 are recessed into the opposing corners of the side plate 11, and are formed on the respective surfaces of the side plate 11 (two surfaces at one end and two surfaces at the other end, for a total of four surfaces). It is almost in contact. A column through hole 22 through which the column 9 can pass is formed at the center of the upper holding means 20. Further, upper holding means support members 12 are fixed to the corners of the side plate 11 that are opposite to each other.
Therefore, the upper holding means 20 is immovable with respect to the main body 10 in both the horizontal direction and the lower direction.
The present invention is not limited to the shape of the upper holding means 20 shown in the figure, but may be a cover that covers the entire top surface of the main body 10, or the column 9 can be penetrated in place of the plate material. A combined body of a tubular body and a pair of arm members fixed to the outer surface of the tubular body may be used.
Further, as long as the upper holding means 20 has a function of preventing the downward movement of the main body 10, the upper holding means supporting member 12 is not limited in its installation position, shape, etc. May be installed or formed by welding overlay.

(Lower holding means)
A lower holding means 30 formed of four plate materials is fixed to the bottom plate 13 of the main body 10 at the center thereof. The lower holding means 30 are radially arranged at the same distance from the center of the bottom plate 13 (same as the intersection of the diagonal lines), and the side edge 31 on the center side becomes a central axis (normal line at the center of the bottom plate 13) as it goes up. It is tapered so that it is far from the same). Therefore, when the support 9 is inserted from above, it becomes easy to insert the support 9 and the outer surface of the support is securely held by the lower holding means 30 by fully inserting the support 9.
The present invention does not limit the form of the lower holding means 30 to the illustrated one, and may be a three- or five-sheet configuration. Instead of the plate material, a tube body into which the support column 9 can enter is used. The bottom plate 13 may be fixed, or a hole or a recess into which the support 9 can enter may be formed in the bottom plate 13. Moreover, it may replace with the outer surface of the support | pillar 9, and you may make it contact | abut to an inner surface.
Further, the upper holding means is located near the bottom plate 13 of the main body 10 in a direction intersecting with the upper holding means 20 in plan view (straddling a corner different from the corner where the upper holding means supporting member 12 is installed). The same as 20 may be arranged.

(Construction method)
(Step 1) Excavating the installation position and curing the bottom surface of the excavation hole.
(Process 2) The support | pillar 9 is set to the main body 10, and it installs in an excavation hole.
(Step 3) Adjustment of the strut pitch and adjustment of the core are performed on the whole (the main body 10 with the struts 9 set).
(Step 4) The remaining soil is backfilled in excavation holes (inside and outside of the main body 10).
In step 2, even if the upper holding means 20 is installed on the support 9 after the support 9 is gripped by the lower holding means 30, the support 9 penetrates the support 9 after the upper holding means 20 is installed on the main body 10. It may be inserted into the hole 22 and further held by the lower holding means 30.

Therefore, the strut foundation 1 can suppress the generation of residual soil to a minimum amount and can be easily constructed, so that the construction cost can be reduced and the construction period can be shortened.
Furthermore, after excavation, the strut 9 can be extracted by excavating the remaining soil backfilled in the main body 10, so that the renewal of the strut 9 is easy, and by excavating the periphery of the main body 10 Since it is easy to collect the main body 10 and the like, it is not necessary to dispose the column base 1 as industrial waste when replacing the column 9 (or a fence attached to the column 9) due to aging or damage. Therefore, it is suitable for preservation of the global environment.

In addition, the material which forms each member (the main body 10, the upper holding means 20, and the lower holding means 30) which comprises the support | pillar foundation 1 is not limited to a steel plate or a stainless steel plate, The concrete and resin in which the reinforcing bar is arrange | positioned Etc.
In addition, a lid or the like for preventing the inflow of rainwater or the like is provided on the upper surface of the main body 10 so that the earth and sand buried in the main body 10 does not flow outside due to rainwater or the like flowing into the main body 10. It may be installed at the opening portion of the opening to close the opening portion.

[Embodiment 2: B type (split type)]
FIGS. 2A and 2B illustrate a support base according to Embodiment 2 of the present invention. FIG. 2A is a plan view, and FIGS. 2B and 2C are partial perspective views. Each figure is shown schematically, and in particular, the thickness (plate thickness) of each member is exaggerated. Further, the present invention does not limit the shape and relative size of each member to those shown in the drawings.
In FIG. 2, the support base 2 includes a main body split piece 40a and a main body split piece 40b, an upper strip member 50a and a lower strip member 60a fixed to the main body split piece 40a, and an upper strip shape fixed to the main body split piece 40b. It has the member 50b and the lower strip | belt-shaped member 60b, and the volt | bolt 8b and nut 8n which integrate the main body division | segmentation piece 40a and the main body division | segmentation piece 40b.
Since the main body divided piece 40a and the main body divided piece 40b and the members fixed to each of them have the same shape, only the main body divided piece 40a is shown in FIGS. 2B and 2C. Yes. In addition, in the description of the common content of members having the same shape, the description of the subscripts “a, b” is omitted. Further, in FIG. 2A, the support 9 supported by the support base 2 is shown by a solid line.

(Main unit)
The main body split piece 40 has a bottom plate 43 and a U-shaped side plate 41 in a plan view, and has a box shape (a rectangular parallelepiped) with an upper surface and one side surface opened. The present invention does not limit the formation procedure of the main body divided piece 40, and a rectangular bottom plate 43 in a plan view may be joined to a member bent in a U shape in a plan view, or in a side view. One surface of the rectangular side plate 41 in a side view may be joined to a member bent in a U-shape (consisting of a pair of side plates 41 facing each other with the bottom plate 43 interposed therebetween).
In addition, a through hole for draining water may be formed in the bottom plate 43 or the side plate 41, or a gap (for example, a range without a weld line) may be provided in a part of a joint portion between the bottom plate 43 and the side plate 41.
And the main body 400 is formed by making the side edge 44a of the main body division | segmentation piece 40a and the side edge 44b of the main body division | segmentation piece 40b oppose. At this time, since the side edge 44a and the side edge 44b do not contact each other, a vertical gap is formed in the side plate 41, and a horizontal gap is formed in the side plate 43.

(Upper holding means, lower holding means)
In FIG. 2B, the upper belt-like member 50 is a plate material in which a rectangular recess 52 is formed in the center in plan view, and the end 51 is a predetermined distance from the upper end of the side edge 44 of the main body split piece 40. The distance is fixed. A pair of through holes 53 for integration through which the bolts 8b for integration can pass is formed at symmetrical positions with the recess 52 interposed therebetween.
The lower belt-like member 60 is a plate material in which a rectangular recess 62 is formed in the center in plan view, and the end 61 is fixed at a predetermined distance from the bottom plate 43 of the side edge 44 of the main body split piece 40. A pair of through holes 63 for integration through which the bolts 8b for integration can pass are formed at symmetrical positions with the recess 62 interposed therebetween.

Accordingly, the upper belt member 50a and the upper belt member 50b are opposed to each other, and the lower belt member 60a and the lower belt member 60b are opposed to each other, and the bolt 8b is connected to the integration through hole 53a and the integration through hole 53b. And through the bolt 8b through the integration through hole 63a and the integration through hole 63b, and by screwing the nut 8n to each, a box-like shape whose upper surface is opened (more precisely, the position of the symmetry plane) The main body 400 can be formed as a rectangular parallelepiped having a gap.
And since the support | pillar 9 is each hold | gripped in the recessed part 52a and the recessed part 52b, and the recessed part 62a and the recessed part 62b, the support | pillar 9 is being fixed to the main body 400. At this time, since the width of the recess 52 and the width of the recess 62 are larger than the outer diameter of the support 9, when the tightening by the bolt 8 b and the nut 8 n is loose, the support 9 moves in the recess 52 and the recess 62 in the width direction. can do. That is, it is possible to adjust the position in the width direction of the column 9 with respect to the main body 400 and the inclination in the plane in the width direction.

The present invention is not limited to the shapes of the upper belt-like member 50 and the lower belt-like member 60, and the rectangular recess 52 and recess 62 may be trapezoidal or arcuate.
Further, in the present invention, the upper belt member 50 and the lower belt member 60 may be fixed to a position separated from the side edge 44 by a predetermined distance (recessed position) without being fixed to the side edge 44 of the main body split piece 40. . At this time, the side edge 44a of the main body divided piece 40a and the side edge 44b of the main body divided piece 40b may contact each other.
Moreover, you may make the upper strip | belt-shaped member 50 and the lower strip | belt-shaped member 60 into the flat plate (channel) which does not comprise the recessed part 52 and the recessed part 62 (refer (c) of FIG. 2).
Further, the upper strip member 50 and the lower strip member 60 may be integrated to form a connecting member in which a single plate is bent (with a recess), or a flat plate (with no recess). The connecting member may be arranged at a position away from the side edge 44 by a predetermined distance.

(Construction method)
(Step 1) Excavating the installation position and curing the bottom surface of the excavation hole.
(Step 2) The support column 9 is set on the main body 400, the nut 8n is temporarily fixed to the bolt 8b, and installed in the excavation hole.
(Step 3) The strut pitch is adjusted inside the concave portion 52 and the concave portion 62, and when there is adjustment of the core, it is performed as a whole (the main body 400 with the strut 9 set).
(Step 4) The nut 8n is permanently fixed to the bolt 8b.
(Step 5) The remaining soil is backfilled in excavation holes (inside and outside of the main body 400).

Therefore, the strut foundation 2 can suppress the generation of residual soil to a minimum amount, and can be easily constructed. Therefore, the construction cost can be reduced, and the construction period can be shortened.
Furthermore, since the column 9 can be extracted by excavating the remaining soil buried in the main body 400 after construction, the column 9 can be easily updated, and by excavating the periphery of the main body 400 Since the main body 400 and the like can be easily collected, it is not necessary to dispose the support base 2 as industrial waste when replacing the support 9 (or a fence attached to the support 9) due to aging or damage. Therefore, it is suitable for preservation of the global environment.
Furthermore, since the main body 400 is formed by the pair of main body split pieces 40, the bulk is reduced and transportation to the construction site is facilitated.
It is to be noted that the material for forming each member constituting the support base 2 is not limited, and that a lid or the like may be installed so that the earth and sand buried inside does not flow out. Is the same.

[Embodiment 3: C type (split type)]
3A and 3B are diagrams for explaining a support foundation according to Embodiment 3 of the present invention, in which FIG. 3A is a plan view, and FIG. 3B is an exploded perspective view showing a part of the members. Each figure is shown schematically, and in particular, the thickness (plate thickness) of each member is exaggerated. Further, the present invention does not limit the shape and relative size of each member to those shown in the drawings.
In FIG. 3, the column base 3 includes a main body divided piece 70 a and a main body divided piece 70 b having a substantially U-shaped cross section, a main body bottom plate 70 c, an upper band member 80, and an upper column holding member 90 attached to the upper band member 80. And bolts 8b and nuts 8n for assembling them.
Since the main body divided piece 70a and the main body divided piece 70b have the same shape, the main body divided piece 70b is not shown in FIG. In addition, in the description of the common content of members having the same shape, the description of the subscripts “a, b” is omitted. Further, in FIG. 3A, the support column 9 supported by the support base 3 is shown by a solid line.

(Main unit)
The main body split piece 70a is a U-shaped plate material in plan view, and side plate flanges 72a are formed on both side edges. The side plate flange 72a is formed with an integration through-hole 73a and an integration through-hole 74a through which a bolt 8b for integration can pass through at a predetermined distance from the upper end and the lower end.
The main body split piece 70b is a plate material having the same shape as the main body split piece 70a, and has a flange 72b in which an integration through hole 73b and an integration through hole 74b are formed on both side edges.
Therefore, when the side plate flange 72a of the main body divided piece 70a and the side plate flange 72b of the main body divided piece 70b are opposed to each other, the upper surface is a box shape (exactly, a rectangular parallelepiped having a gap at the position of the symmetrical surface). A main body 700 is formed.

  The main body bottom plate 70c is a rectangular plate material, and the lower holding means 32 is fixed to the center. The lower holding means 32 is a pair of plate members having the same shape and arranged in parallel. Each side edge 33 (total of four places) is located on a circle centering on the center of the main body bottom plate 70c, and The inner diameter can be contacted freely. The lower holding means 32 may be changed to the lower holding means 30 in the support base 1 (Embodiment 1).

Further, fixing members 73c each having an L-shaped cross section are fixed to both side edges of the main body bottom plate 70c. The fixing member 73c includes a fixing portion 71c that is fixed to the main body bottom plate 70c, and a pressing portion 72c that is perpendicular to the fixing portion 71c. The pinching portion 72c is located on the symmetry plane (plane passing through the center) of the main body bottom plate 70c, and the integration through hole 74c through which the bolt 8b for integration can pass through at a predetermined distance from the upper surface of the main body bottom plate 70c. Is formed.
In the figure, the fixing members 73c are fixed to both side edges of the main body bottom plate 70c. However, the present invention is not limited to this, and the fixing members 73c may be fixed inside by a predetermined distance from the side edges. At this time, the midpoint of the line connecting the centers of the integration through holes 74c is read as the center of the main body bottom plate 70c.

(Upper strip member)
The upper belt-like member 80 has a belt-like shape in which an arc-shaped concave portion 82 is formed at the center, and a pair of gripping through holes 85 so as to sandwich the concave portion 82, and a bolt 8b for integration near the end portion 81. The through-hole 83 for integration which is freely penetrated and is long in the width direction is formed. At this time, the interval between the pair of integration through holes 83 is substantially the same as the interval between the integration through holes 73a and 73b formed in the side plate flanges 72a and 72b.

(Upper holding member)
The upper strut gripping member 90 has a strip shape with an arc-shaped recess 92 formed at the center, and a pair of gripping through holes 95 are formed so as to sandwich the recess 92. At this time, the distance between the pair of gripping through holes 95 is the same as the distance between the gripping through holes 85 formed in the upper strip member 80.

(Assembly of the main body)
In the main body 700, the main body divided piece 70a and the main body divided piece 70b are arranged so that the side plate flange 72a and the side plate flange 72b are opposed to each other so as to sandwich the pressing portion 72c of the fixing member 73c of the main body bottom plate 70c. At this time, since the pair of integration through holes 74a, the integration through hole 74b, and the integration through hole 74c overlap, a bolt 8b is inserted therein to temporarily fix the nut 8n.
Then, the vicinity of the end portion 81 of the upper strip member 80 is inserted between the side plate flange 72a and the side plate flange 72b, and a pair of integration through holes 73a, integration through holes 83, and integration through holes 73b. And the bolt 8b is inserted into these, and the nut 8n is temporarily fixed.
Thus, the main body 700 is formed. The upper belt member 80 may be attached first, and then the main body bottom plate 70c may be attached.

Further, the upper support member 90 is stacked on the upper belt member 80, and the former recess 82 and the latter recess 92 form a substantially cylindrical shape. The bolts 8b are connected to the pair of gripping through holes 85 and the gripping through holes 95. To temporarily fix the nut 8n.
Therefore, the support column 9 is inserted into the substantially cylindrical shape, and the lower end is covered with the lower holding means 32 to make the movement impossible. Then, the bolts 8b and the nuts 8n are permanently fixed, and the support column 9 is gripped by the upper belt member 80 and the upper support member 90. Then, since the upper belt-like member 80 in the temporarily fixed state can be moved by pushing the end portion 81, the position can be adjusted in the width direction with respect to the main body split pieces 70a and 70b (exactly, Since the lower end cannot be moved by the lower holding means 32, the in-plane inclination in the width direction can be adjusted).
The upper support member 90 may be temporarily fixed and permanently fixed to the upper belt member 80 after the upper belt member 80, the main body divided piece 70a, and the main body divided piece 70b are fixed.

(Construction method)
(Step 1) Excavating the installation position and curing the bottom surface of the excavation hole.
(Step 2) After the support column 9 is set on the main body 700, the nut 8n is temporarily fixed to each bolt 8b and installed in the excavation hole.
(Step 3) The strut pitch is adjusted by moving the upper strip member in the width direction, and when there is adjustment of the core, it is performed as a whole (the main body 700 with the struts 9 set).
(Step 4) A nut 8n is permanently fixed to each bolt 8b.
(Step 5) The remaining soil is backfilled in the excavation holes (inside and outside of the main body 700).

Therefore, the strut foundation 2 can suppress the generation of residual soil to a minimum amount, and can be easily constructed. Therefore, the construction cost can be reduced, and the construction period can be shortened.
Furthermore, since the column 9 can be extracted by excavating the remaining soil buried in the main body 700 after the construction once, it is easy to update the column 9, and by excavating the periphery of the main body 700 Since the main body 700 and the like can be easily collected, it is not necessary to dispose the support base 3 as industrial waste when replacing the support 9 (or a fence attached to the support 9) due to aging or damage. Therefore, it is suitable for preservation of the global environment.
Furthermore, since the main body 700 is formed by a pair of main body split pieces 70, and the main body split pieces 70 can be densely stacked only by being slightly elastically deformed, the bulk during storage and transport is greatly reduced. , Easy to store and transport to the construction site.

In the above, the integration through-hole 83 is a long hole, but the present invention is not limited to this, and a circular through-hole may be used. At this time, the position can be slightly adjusted in the range of play (clearance) between the through hole and the bolt 8b.
Further, the lower holding means 32 fixed to the main body bottom plate 70c is removed, and the same members as the upper belt member 80 and the upper column gripping member are disposed at a position close to the main body bottom plate 70c, and thereby the lower end of the column 9 is arranged near them. You may make it hold | grip.
It is to be noted that the material for forming each member constituting the support base 3 is not limited, and that a lid or the like may be installed so that earth and sand buried inside do not flow outside. Is the same.

[Embodiment 4: D type (integrated type)]
FIG. 4 is a perspective view for explaining a support foundation according to Embodiment 4 of the present invention. Note that FIG. 4 is a schematic view, and in particular, the thickness (plate thickness) of each member is exaggerated. Further, the present invention does not limit the shape and relative size of each member to those shown in the drawings.
In FIG. 4, the support foundation 4 includes a main body 14 including a side plate 11 and a bottom plate 13, an upper beam 24 disposed near the upper end of the main body 14, and a lower beam disposed near the bottom plate 13 of the main body 14. 34 and a pair of U-shaped fasteners 7 respectively installed in an upper long hole 25 formed in the upper beam 24 and a lower long hole 35 formed in the lower beam 34.

The U-shaped fastener 7 includes a circular arc portion 7a having a radius of curvature substantially equal to or slightly larger than the radius of the column 9, and screw portions 7b formed at both ends thereof. It is possible to enter the long hole 35.
Therefore, the screw portion 7b of one U-shaped fastener 7 is inserted into the upper elongated hole 25 to temporarily fix the nut 7n, and the screw portion 7b of the other U-shaped fastener 7 is inserted into the lower elongated hole 35 to form a nut. If 7n is temporarily fixed, the support | pillar 9 can be inserted in each circular arc part 7a (it is pinched | interposed into the screw part 7b). Then, if the nut 7n is tightened into the screw portion 7b and fixed, the column 9 is firmly installed on the column base 4.
That is, the support foundation 4 can be constructed in the same manner as the support foundation 1 (Embodiment 1), and the same effects as the support foundation 1 can be obtained by a simple component.
It is to be noted that the material for forming each member constituting the support base 4 is not limited, and that a lid or the like may be installed so that earth and sand buried inside do not flow outside. Is the same.

  The support foundation according to the present invention minimizes the generation of residual soil, is easy to construct, and can be reused separately from the fence (support). It can be widely used as a support foundation.

The column foundation according to Embodiment 1 of the present invention will be described. (A) is a perspective view, (b) is a sectional view in side view, (c) is a plan view, and (d) is a partially removed plane. Figure. The support | pillar foundation which concerns on Embodiment 2 of invention is demonstrated, (a) is a top view, (b) and (c) are some perspective views. The support | pillar foundation which concerns on Embodiment 3 of this invention is demonstrated, (a) is a top view, (b) is a perspective view which decomposes | disassembles and shows a part of member. The perspective view explaining the foundation for pillars concerning Embodiment 4 of the present invention.

Explanation of symbols

1 Foundation for support (Embodiment 1)
2 Foundation for support (Embodiment 2)
3 Foundation for support (Embodiment 3)
4 Foundation for support (Embodiment 4)
7 U-shaped fastener 7a Arc portion 7b Screw portion 7n Nut 8b Bolt 8n Nut 9 Post 10 Main body 11 Side plate 12 Upper holding means support member 13 Bottom plate 14 Main body 20 Upper holding means 21 End 22 Post through hole 24 Upper beam 25 Upper length Hole 30 Lower holding means 31 Side edge 32 Lower holding means 33 Side edge 34 Lower beam 35 Lower elongated hole 40 Main body split piece 41 Side plate 43 Bottom plate 44 Side edge 50 Upper strip member 51 End portion 52 Concavity 53 Integration through hole 60 Lower Band-shaped member 61 End 62 Recess 63 Integration through hole 70a Main body split piece 70b Main body split piece 70c Main body bottom plate 71c Fixing portion 72a Side plate flange 72b Side plate flange 72c Holding portion 73a Integration through hole 73b Integration through hole 73c Fixing member 74a Integration through hole 74b Integration through hole 74c Integration through hole 80 Upper belt shape Member 81 End part 82 Concave part 83 Integration through hole 85 Grasping through hole 90 Upper strut gripping member 92 Concave part 95 Grasping through hole 400 Main body (Embodiment 2)
700 Body (Embodiment 3)

Claims (8)

A main body formed in a hollow quadrangular prism shape with an upper surface opened, which is installed in a drilling hole;
Upper holding means that is arranged near the upper end of the main body and holds the middle part of the column to be installed;
A lower holding means that is disposed near the bottom plate of the main body or near the bottom plate and holds the lower end of the column, and
In the state where the support column is held by the upper holding means and the lower holding means, all or part of excavated soil excavated when forming the excavation hole is backfilled inside the main body. The foundation for the column. The upper holding means is a plate material that is in contact with a part of the inner peripheral surface of the main body so as to be immovable, and has a column through-hole through which the column can pass,
2. The support foundation according to claim 1, wherein the lower holding means is a plate material or a tube material fixed to the bottom plate of the main body and abutting against an outer peripheral surface or an inner peripheral surface of the support column. The upper and lower beams are fixed across the opposing side plates of the main body,
The upper holding means is formed from the upper beam and a U-shaped fastener installed on the upper beam,
2. The support foundation according to claim 1, wherein the lower holding means is formed of the lower beam and a U-shaped fastener installed on the lower beam. The main body is formed by abutting a pair of main body divided pieces composed of a bottom plate and side plates forming three surfaces, and each of the pair of main body divided pieces has a connecting member straddling the opposing side plates. Fixed,
2. The support column according to claim 1, wherein the upper holding means and the lower holding means are formed by connecting a connecting member of the one main body dividing piece and a connecting member of the other main body dividing piece. For foundation.   The support foundation according to claim 4, wherein a concave portion capable of storing a part of the support is formed in a central portion of the connecting member. The main body is formed by abutting a pair of main body divided pieces each including a bottom plate and a side plate forming three surfaces, and each of the pair of main body divided pieces has an upper belt-like member straddling the opposing side plates. And the lower strip member is fixed,
The upper holding means is formed by connecting the upper strip member of the one main body split piece and the upper strip member of the other main body split piece,
2. The support foundation according to claim 1, wherein the lower holding means is formed by connecting a lower band member of the one main body division piece and a lower band member of the other main body division piece.   The base for a pillar according to claim 6, wherein a concave part capable of accommodating a part of the pillar is formed in a central part of the upper belt member and a central part of the lower belt member. The main body includes a rectangular bottom plate and a pair of substantially U-shaped main body split pieces, and the side plate flanges formed on both side edges of the pair of main body split pieces are opposed to each other. Forming a hollow quadrangular column and connecting the bottom plate to the hollow quadrangular column,
The upper holding means includes an upper belt-like member in which a concave portion capable of accommodating a part of the column is formed in a central part where both end parts are held between the opposed side plate flanges, and a part of the column is formed in the central part. An upper support grip member formed with a retractable recess, and is formed by installing the upper support grip member on the upper belt-shaped member,
The support foundation according to claim 1, wherein the lower holding means is a plate member or a pipe member fixed to the bottom plate and abutting against an outer peripheral surface or an inner peripheral surface of the support column.

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