JP2016079683A - Earth retaining structure for banking, and integrally cast body for foundation and earthen floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth retaining structure for a banking that withstands compaction pressure of the banking and is made of a low-cost material, and an integrally cast body for a foundation and an earthen floor that may be constructed at a low cost using the earth retaining structure.SOLUTION: The earth retaining structure for a banking includes a disposable concrete mold 2 that rises while extending laterally along an edge of a banking 1. The disposable concrete mold 2 is made of a steel plate having a crest part 2a at one or more locations in a vertical direction of a corrugated cross-section extending in the lateral direction, and is fixed on a ground 10 with a fixing pile 3 piercing through the crest part 2a. An integrally cast body 11 for a foundation and an earthen floor includes the earth retaining structure for a banking and a continuous footing 12 on an opposite side of the banking 1 along the disposable concrete mold 2, and is made of concrete cast integrally to form earthen floor concrete 13 covering a top surface of the banking 1 and a base part 12a of the continuous footing 12.SELECTED DRAWING: Figure 1

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embankment structure for embankment in the interior of a building such as a house or a commercial and industrial facility, and a foundation / soil integral structure provided with the retaining structure.

As a conventional example of a construction method in which a cloth foundation and soil concrete adjacent to the cloth foundation are integrally placed, as shown in FIG. 11, a GRC plate and a plank are formed along the edge of the embankment 31 inside the soil on the cloth foundation 42 side. There is known a construction method in which the embankment 31 is earthed by providing a discarded formwork 32 such as a steel plate or a lath formwork, and the base portion 42a of the cloth foundation 42 and the soil concrete 43 are integrally cast in this state.
As another conventional example, as shown in FIG. 12, the embankment 31 is earthed by providing a slope (slope) 31a on the edge of the embankment 31 inside the soil on the fabric foundation 42 side. There is also a construction method in which the base portion 42a and the soil concrete 43 are cast integrally. In the method shown in FIGS. 11 and 12, the rising portion 42b of the fabric foundation 42 is made of precast concrete.

JP 2013-159922 A Japanese Patent Laid-Open No. 10-140654

In the conventional method shown in FIG. 11, the discarded mold 32 is used to retain the embankment 31 inside the soil, but when a GRC plate or a thick steel plate is used as the discarded mold 32, the strength is strong. Is expensive. Further, when a lath mold is used as the discard mold 32, there is a problem that the strength is low although it is inexpensive. In this case, it is possible to use a general steel plate as the discarded mold frame 32, but in this case, the rigidity of the discarded mold frame 32 is insufficient, and the discarded mold frame 32 is deformed into a shape by rolling the cloth foundation 42. There is a problem.
In the conventional construction method shown in FIG. 12, the slope (slope) 31a provided on the edge of the embankment 31 on the fabric foundation 42 side is difficult to roll and collapse, and is shown by a chain line in the figure. There is a problem that extra concrete will be placed in the part.

  An object of the present invention is to provide an embankment structure for embankment that can withstand rolling pressure of embankment and can be sewn with an inexpensive material with good workability, and a foundation / soil integrated casting body that can be constructed at low cost using this earth retaining structure. That is.

  The embankment retaining structure of the embankment of the present invention includes a discarded mold frame that extends in the lateral direction along the edge of the embankment and rises, and the discarded mold frame has a wavy portion of a corrugated cross-sectional shape extending along the lateral direction in the vertical direction. It consists of a steel plate having at least one place, and is fixed to the ground by a fixed pile that penetrates the wave mountain portion in a skewered state.

  According to this configuration, the discarded formwork that rises along the edge of the embankment is made of a steel plate that has one or more wavy portions extending in the horizontal direction in the vertical direction, and therefore has high rigidity due to the uneven shape. . Further, the discarded formwork is reinforced by a fixed pile penetrating the wave mountain portion in a skewered state. Therefore, it can sufficiently withstand the rolling pressure of the embankment. Moreover, since it is a discarded formwork which only processed the wave peak part in the steel plate, it can be obtained at low cost. As for the fixing of the discarded formwork to the ground, the workability is good because it is fixed by a fixed pile penetrating the wave mountain portion in a skewered state. In this way, the embankment structure of the embankment that can withstand the rolling pressure of the embankment and can be sewn with low cost materials with good workability because the wavy portion of the steel plate is effectively used for two different roles of rigidity improvement and fixing to the ground. It becomes.

In the present invention, the discarded formwork may have a bottom bent piece projecting toward the embankment side at the lower end, and the fixed pile may vertically penetrate the bottom bent piece. The wave crest portion of the discard mold may be, for example, a trapezoidal cross section.
In this configuration, the discarded formwork is kept in a stable standing posture by the bottom bent piece at the lower end and the fixed pile penetrating the bottom bent piece up and down, so that the embankment can be more securely held in place. it can.

In the present invention, the wave crest portion of the discard mold may be provided in at least an upper half portion of the discard mold.
The force pressed from the embankment at the time of rolling compaction acts on the upper half part of the discard mold more than the lower half part. Therefore, by providing the wave peak portion in the upper half portion, deformation of the protrusion shape due to increased rigidity is more effectively prevented.

In this invention, a plurality of the discard molds are continuous in a state where the end portions overlap each other, and the fixed piles are arranged to overlap the discard molds on both sides of the overlapped portions of the adjacent discard molds. It is good also as what penetrates and serves as the connection of the discard molds of both sides, and fixation to the ground of these discard molds.
In the case of this configuration, the fixed pile can be used also as the connection jig for the discarded formwork, so the number of types of members can be reduced, and the material cost can be reduced. Moreover, since it is only necessary to penetrate the fixed pile through the overlapping portion, the workability is also excellent.

In this invention, it is good also as what the said fixed pile consists of a bending process product of a steel plate, and penetrates in the pile insertion hole formed in the said wave crest part of the said discard formwork in a press-fit state.
Since the fixed pile is made of a bent product of a steel plate, it is easier to penetrate even when there are obstacles such as stones in the ground compared to the round pile, and the pile can be obtained at a low cost. By penetrating into the press-fitted state, the accuracy and improvement of the installation position of the discarded formwork can be improved, and wobbling can be avoided.

The foundation-soil integral striker of the present invention is a foundation-soil integral striker having the embankment earth retaining structure of the invention,
It has a cloth foundation at a position opposite to the embankment along the discarded formwork, and is made of concrete in which soil concrete covering the upper surface of the embankment and a base portion of the cloth foundation are integrally cast.

  According to this configuration, since the embankment retaining structure of the embankment according to the present invention is adopted for embankment inside the soil, it is possible to construct the foundation / soil integral casting body at low cost. In addition, the discarded formwork is not deformed, can be constructed with high accuracy, and has excellent workability. In addition, there is little generation of extra concrete, and there are no places that are unstable in construction, such as slopes.

  In this invention, the rising portion of the fabric foundation may be made of precast concrete. When the rising portion is precast concrete, the workability is further improved.

  The embankment retaining structure of the embankment of the present invention includes a discarded mold frame that extends in the lateral direction along the edge of the embankment and rises, and the discarded mold frame has a wavy portion of a corrugated cross-sectional shape extending along the lateral direction in the vertical direction. Because it is made of steel plate in one or more places and is fixed to the ground by a fixed pile that penetrates the wavy mountain portion in a skewered state, it can withstand rolling of the embankment and can be earthed with an inexpensive material, for workability Also excellent.

  The foundation / soil integrated casting body of the present invention is a foundation / soil integrated casting body having the embankment retaining structure of the above described invention, and has a fabric foundation at a position opposite to the banking along the discarded formwork. Since the soil-concrete covering the upper surface of the embankment and the base portion of the fabric foundation are made of concrete, the foundation-soil-integrated body is made with good workability, inexpensively and accurately. Can be constructed.

1 is a cross-sectional view of an example of an integrated foundation-soil striker having a banking structure for embankment according to an embodiment of the present invention. It is a perspective view of the discard mold in the same earth retaining structure. It is a perspective view of the discarded formwork of the protrusion corner part in the earth retaining structure. It is a horizontal sectional view showing each example of a fixed pile in the earth retaining structure. It is explanatory drawing which shows the construction process of a foundation-soil integrated strike body. It is sectional drawing of the foundation-soil integrated strike body to which the other example of the earth retaining structure was applied. It is sectional drawing of the foundation-soil integral strike body to which the further another example of the earth retaining structure was applied. It is sectional drawing of the other example of the foundation-soil integrated strike body provided with the earth retaining structure. It is a perspective view of a concrete placing stair provided with the earth retaining structure. It is sectional drawing at the time of construction of the concrete casting staircase. It is sectional drawing of a prior art example. It is sectional drawing of another prior art example.

  An example of a foundation-soil-integrated striked body provided with an embankment retaining structure according to an embodiment of the present invention will be described with reference to FIGS. This earth retaining structure is applied to a building such as a house or a commercial or industrial facility. As shown in FIG. 1, the embankment retaining structure of the embankment includes a disposal mold 2 that extends in the lateral direction along the edge of the embankment 1 and rises. The discarded mold 2 is made of a steel plate having one or more (in this case, two) undulations 2a having a corrugated cross-sectional shape extending along the transverse direction, and the undulations 2a are skewered. It fixes to the ground 10 with the fixed pile 3 penetrated up and down. Of the two wave crests 2 a of the discard frame 2, at least one wave crest 2 a is preferably located in the upper half of the discard mold 2. Here, the cross-sectional shape of the wave peak portion 2a is a trapezoid.

As shown in a perspective view of FIG. 2, the discarded mold 2 has a bottom bent piece 2b protruding toward the embankment 1 at the lower end, and this bottom bent piece 2b penetrates the wave crest 2a. The fixed pile 3 penetrates up and down and is fixed to the ground 10. In addition, a plurality of the discard molds 2 are continuous in a state where the side end portions overlap each other, and the fixed piles 3 are disposed on the overlapping portions of the adjacent discard molds 2 and 2 on both sides of the overlapped discard molds 2 and 2. It penetrates over both, and serves as the connection of the discard molds 2 and 2 on both sides and the fixing of these discard molds 2 to the ground 10. In this way, by using the fixed pile 3 as a connection jig for the discarded formwork 2, the types of members can be reduced, and the material cost can be reduced at a low cost.
FIG. 3 is a perspective view showing the discarded mold frame 2A at the protruding corner. The throwing-out form 2A at the protruding corner is configured by joining one end of each of the two strip-shaped throwing forms 2 and 2 by welding or screws (not shown) so as to be perpendicular to each other. Is done.

The fixed pile 3 is made of a bent product of a steel plate, and penetrates into a pile insertion hole 4 formed in the wave crest portion 2a of the discard mold 2 in a press-fitted state. That is, the pile insertion hole 4 is formed to have a slightly smaller cross-sectional dimension than the cross-sectional dimension of the fixed pile 3. The cross-sectional shape of the pile insertion hole 4 may be the same as the cross-sectional shape of the fixed pile 3 or a polygonal shape with which the fixed pile 3 is inscribed as long as it is in a press-fit state. In FIG. 4, each example of the fixed pile 3 is shown with the horizontal sectional view. 4A shows an example of the fixed pile 3 having a V-shaped cross section, FIG. 4B shows an example of the fixed pile 3 having a cross-sectional groove shape, and FIG. 4C shows the center of the flat plate portion. The example of the fixed pile 3 made into the cross-sectional shape which has a V-shaped part in the cross section is shown, in other words, it is set as the cross-sectional shape in which the flat protrusion part continues on both sides of the V-shaped part.
In the case of the fixed pile 3 having a cross-sectional shape shown in FIG. 4 (A), it is conceivable that, when the fixed pile 3 is driven into the ground 10, when it hits a crushed stone or the like in the soil, the fixed pile 3 is displaced and rotated. Further, in the case of the fixed pile 3 having a cross-sectional shape shown in FIG. 4 (B), it may not be driven smoothly if it hits a crushed stone in the soil. On the other hand, in the case of the fixed pile 3 having a cross-sectional shape shown in FIG. 4 (C), it does not rotate even if it hits a crushed stone in the soil and can be driven smoothly, so it is used for the earth retaining structure. Most preferable as the fixed pile 3.

The foundation / soil integral casting body 11 of FIG. 1 having the above-described embankment retaining structure has a cloth foundation 12 at a position opposite to the embankment 1 along the discarded mold 2 and covers the upper surface of the embankment 1. The soil concrete 13 and the base portion 12a of the fabric foundation 12 are made of concrete that is integrally cast. The outline of the construction procedure of the foundation-soil integral casting 11 will be described below with reference to FIG.
First, as shown in FIG. 5A, a root cutting recess 15 in which the fabric foundation 12 is disposed below the ground upper surface level GL is excavated, and the discard mold is formed along the edge of the embankment 1 remaining adjacent to the root cutting recess 15. The frame 2 is arranged, and this is fixed to the ground 10 with the fixed pile 3. Further, in the root cutting recess 15, the foundation molds 16, 16 </ b> A, 17 for placing the fabric foundation 12 are opened in a portion that becomes the side surface on the soil concrete 13 side of the base portion 12 a of the fabric foundation 12. Install.
Next, as shown in FIG. 5 (B), concrete is placed in the foundation molds 16, 16 </ b> A, 17 of the fabric foundation 12, and soil concrete 13 is also placed on the embankment 1.
Then, after curing the concrete, as shown in FIG. 5 (C), the foundation molds 16, 16A and 17 are removed, and the soil is filled in the space on the opposite side of the molded fabric foundation 12 from the soil concrete 13. return.

  As described above, the earth retaining structure of the embankment includes the discarded mold frame 2 that extends in the lateral direction along the edge of the embankment 1 and rises, and the corrugated mountain portion of the corrugated cross-sectional shape in which the discarded mold frame 2 extends along the lateral direction. It is made of a steel plate having 2a at one or more places in the vertical direction, and is fixed to the ground 10 by a fixed pile 3 that vertically penetrates the wavy mountain portion 2a so that it can withstand rolling pressure of the embankment 1 and is inexpensive. The embankment 1 can be earthed. Moreover, it is excellent in workability.

  Further, in this embodiment, the discard mold 2 has a bottom bent piece 2b protruding on the embankment 1 side at the lower end, and the fixed pile 3 penetrates the bottom bent piece 2b vertically. By the bottom bent piece 2b and the fixed pile 3 penetrating the bottom bent piece 2b up and down, the discarded mold frame 2 can be maintained in a stable standing posture, and the embankment 1 can be more reliably earthed.

Further, the foundation-soil integral casting body 11 having the earth retaining structure for the embankment has a cloth foundation 12 at a position opposite to the embankment 1 along the discarded frame 2 and covers the upper surface of the embankment 1. And the base portion 12a of the fabric foundation 12 are made of concrete that is integrally cast, so that the foundation-soil integral casting body 11 can be constructed at low cost.
Furthermore, since the earth retaining can be performed as described above, the construction can be performed for each section without discharging the remaining soil to the outside, which contributes to the reduction of the disposal cost of the remaining soil, thereby reducing the cost.

  FIG. 6 shows a cross-sectional view of another example of the foundation-soil integrated body 11 having the earth retaining structure of the embankment 1. In this example, as the discard mold 2, there is used one having 1.5 ridges 2a, that is, one ridge 2a and half ridges 2aa arranged vertically. Other configurations and operational effects are the same as in the case of the foundation-soil-integrated body 11 shown in FIGS.

  FIG. 7 is a cross-sectional view showing still another example of the foundation-soil integrated casting body 11 having the earth retaining structure of the embankment 1. In this example, the discard mold 2 having the wave crest 2a only at one place in the vertical direction is used. Other configurations and operational effects are the same as in the case of the foundation-soil-integrated body 11 shown in FIGS.

  FIG. 8 is a cross-sectional view showing still another example of the foundation / soil integrated body 11 having the earth retaining structure of the embankment 1. In this example, in the foundation-soil integrated casting body 11 shown in FIGS. 1-5, it replaces with the basic formwork 17 which shape | molds one side surface of the base part 12a of the fabric foundation 2, and is used for the earth retaining structure of the embankment 1 A discarded mold 2 having the same structure as that of the former one is provided. In this example, the rising portion 12b of the fabric foundation 12 is made of precast concrete.

  In this foundation-soil integrated casting 11, the mold for forming one side surface of the base portion 12 a of the fabric foundation 12 is formed of the discard mold 2, so that it is not necessary to remove the mold at the fabric foundation base portion 12 a after placing the concrete. become. Further, since the rising portion 12b of the fabric foundation 12 is made of precast concrete, the foundation molds 16 and 16A for the molding are not necessary, and the mold release is not necessary. Thereby, construction becomes easy and cost can also be reduced.

  FIG. 9 shows an external perspective view of the base portion 21 made of a concrete staircase having the above-described embankment retaining structure, and FIG. 10 shows a cross-sectional view of the base portion 21 during construction. Also in this pedestal portion 21, the same abandonment mold frame 2 as that used in the earth retaining structure of the foundation-soil integrated casting body 11 shown in FIGS. The pile 3 is fixed to the ground 10. A normal mold 22 for forming the outer surface of the pedestal 21 is installed on the outside of the discarded mold 2, and the concrete 21 is formed in the inner space of the mold 22 to form the pedestal 21 that becomes a concrete stairs. Is done.

  Even in the base portion 21 such as a concrete staircase, since the internal embankment 1 </ b> A is earthed by the discarded mold 2, the burial due to earth pressure does not occur in the discarded mold 2.

DESCRIPTION OF SYMBOLS 1 ... Embankment 2 and 2A ... Discarding formwork 2a, 2aa ... Wave mountain part 2b ... Bottom bent piece 3 ... Fixed pile 4 ... Pile insertion hole 10 ... Ground 11 ... Foundation-soil integrated strike body 12 ... Cloth foundation 12a ... Base part 12b ... rise part 13 ... concrete concrete

Claims (7)

  It comprises a discarded mold that extends in the lateral direction along the edge of the embankment and rises up, and this discarded mold consists of a steel plate having corrugated crests of a cross-sectional shape extending in the horizontal direction in one or more locations in the vertical direction, The earth retaining structure of the embankment fixed to the ground by a fixed pile penetrating the wave mountain portion in a skewered state.   The earth retaining structure for embankment according to claim 1, wherein the discarded formwork has a bottom bent piece protruding to the embankment side at a lower end, and the embankment through which the fixed pile penetrates the bottom folded piece. Earth retaining structure.   The embankment structure for embankment according to claim 1 or 2, wherein the corrugated portion of the discard mold is provided in at least an upper half portion of the discard mold.   The embankment structure for embankment according to any one of claims 1 to 3, wherein the corrugated portion of the discarded formwork is a trapezoidal cross section.   The earth retaining structure for embankment according to any one of claims 1 to 4, wherein a plurality of the discarded molds are continuous in a state where ends thereof overlap each other, and the fixed piles are adjacent to the discarded molds. An embankment retaining structure for embankment that penetrates the wave crests over the overlapping molds on both sides of the overlapping part, and serves to connect the discarded molds on both sides and to fix the discarded molds to the ground.   The embankment retaining structure for embankment according to any one of claims 1 to 5, wherein the fixed pile is made of a bent product of a steel plate, and is formed in a pile insertion hole formed in the undulating portion of the discarded formwork. Earth retaining structure of embankment that penetrates into the press-fit state. A foundation-soil-integrated body comprising the embankment retaining structure according to any one of claims 1 to 6,
The foundation-soil integral strike which consists of the concrete which has the cloth foundation in the position on the opposite side to the said embankment along the said discard formwork, and the soil concrete which covers the upper surface of the said embankment and the base part of the said cloth foundation was integrally cast. body.

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