JP5656251B2 - Ground drainage structure and its construction method - Google Patents

Description

  The present invention relates to a ground drainage structure for smoothly draining water that has entered from the outside into ground such as embankment and the like, and a construction method therefor.

  If the moisture content of the ground increases, the earth and sand that make up this ground will be fluidized and its strength will be reduced, and the ground may become unstable.

  Therefore, conventionally, a planar drainage material in which a drainage material is disposed on the back surface of the retaining wall on a plate shape that is vertically oriented and arranged vertically is proposed. Conventionally, there is one disclosed in Patent Document 1 below.

  When water enters the back surface of the retaining wall from the outside, such as in rainy weather, the water is drained to the outside by flowing down the upper and lower drainage materials sequentially. As a result, the retaining wall is held at a predetermined strength.

  Here, when constructing the rear surface structure of the retaining wall in which the upper and lower drainage materials are embedded, the following construction methods are conceivable.

  That is, first, the bottom drainage material is disposed on the bottom surface of the retaining wall so that the bottom drainage material maintains a vertical orientation on the top surface of the ground base side of the bottom surface of the retaining wall, and in this state, the surface opposite to the retaining wall of the bottom drainage material is provided. Embed by embankment.

  Next, the worker positions and places the lower end edge of the upper drainage material in the thickness direction of the drainage material with respect to the upper surface of the upper end edge of the lower drainage material, and maintains this placement state. At the same time, the upper drainage material is disposed on the rear surface of the retaining wall so as to maintain a vertical orientation, and in this state, the surface opposite to the retaining wall of the upper drainage material is buried with embankment.

  Next, the upper drainage material is regarded as the lower drainage material, and another upper drainage material is erected on the upper surface of the upper edge of the lower drainage material. Are buried in sequence between the back surface of the retaining wall and the embankment, the construction work of the planar drainage material on the back surface of the retaining wall is completed.

JP 2006-16875 A

  By the way, unlike the drainage material construction method in the prior art, if the drainage material is to be embedded in the embankment instead of the back surface of the retaining wall, there are the following problems.

  That is, first, when the upper and lower drainage materials are to be embanked on both sides of each drainage material, not on the back surface of the retaining wall, that is, when embedding in the embankment, the worker does not have retaining walls. In addition, it is required to hold the upper and lower drainage materials, respectively, so that the lower drainage material maintains a vertical orientation. However, such work is complicated.

  Second, since the retaining wall does not exist after embedding the lower drainage material in the embankment, the lower edge of the upper drainage material is positioned at a predetermined position on the upper surface of the upper edge of the lower drainage material. Although it is placed, such positioning work is complicated.

  Third, when the upper drainage material is embedded in the embankment, the upper drainage material is maintained while the upper drainage material is placed on the upper surface of the upper edge of the lower drainage material embedded in the embankment. In this case, the upper drainage material is given earth pressure by embankment from both sides. For this reason, it is required to hold the upper drainage material so that the mounting state of the lower edge portion of the upper drainage material relative to the upper surface of the upper edge portion of the lower drainage material is not unexpectedly released by the earth pressure. . However, such work is also extremely complicated.

  The present invention has been made paying attention to the above-described circumstances, and the object of the present invention is a ground drainage structure in which the vertical drainage is placed in the vertical orientation and the lower drainage material is buried. The construction work should be made easier.

  The first aspect of the present invention is a vertically oriented, vertically arranged plate-like upper and lower drainage material 8 (U), 8 (L), and above and below. The drainage material 8 (U), 8 (L) is provided with a pair of left and right column members 10, 10 disposed in the vicinity of the left and right sides in the thickness direction and embedded in the ground 1. In the ground drainage structure characterized in that the upper end portions of the left and right column members 10 and 10 located on the respective sides of (L) are positioned above the upper end edge portion of the lower drainage material 8 (L), respectively. is there.

Moreover, the said invention is formed in the recessed part 24 opened upwards so that the lower end edge part of the said upper waste_water | drain_material 8 (U) may be inserted in the upper-end edge part of the said lower waste_water | drain material 8 (L). Ru Tei comprises a connecting device 9.

Moreover, the said invention is provided with the water-permeable cover sheet | seat 19 extended toward each downward from each side surface of the said upper drainage material 8 (U), and covering each side surface of at least the upper end edge part of the said lower drainage material 8 (L). Tei Ru.

In addition, as illustrated in FIG. 7 , the above-described invention is hung on the upper edge of the lower drainage material 8 (L), and the left and right column members are positioned lower than the upper end of the lower drainage material 8 (L). Ru Tei with a fastener 35 for locked respectively engaging the respective middle portions in the vertical direction of 10 and 10.

The invention according to claim 2 is in a vertically oriented posture , arranged in a vertical direction, on a plate shape embedded in the ground 1, lower drainage materials 8 (U), 8 (L), and above and below The drainage material 8 (U), 8 (L) is provided with a pair of left and right column members 10, 10 disposed in the vicinity of the left and right sides in the thickness direction and embedded in the ground 1. (L) It is the construction method of the ground drainage structure which located each upper end part of the right-and-left pillar materials 10 and 10 located in each side of the above from the upper end edge of the above-mentioned lower drainage material 8 (L), respectively. The lower side 3L and the upper side 3U of the embankment 3 are sequentially stacked from the upper surface on the ground base 2 side of the ground 1, and the above-mentioned embankment while sequentially stacking the lower drainage material 8 (L) and the upper drainage material 8 (U). When burying in 3
First, the lower drainage material 8 (L) is erected on the upper surface of the ground base 2 side, and the left and right column members 10, 10 are erected on each side of the lower drainage material 8 (L), The lower side of the combined body 39 of the lower drainage material 8 (L) and the left and right column members 10, 10 erected on the upper surface on the ground base 2 side is embedded in the lower side 3 L of the embankment 3 to be independent.
Next, the lower end edge of the upper drainage material 8 (U) is inserted between the upper end sides of the left and right column members 10, 10, and the upper drainage material 8 (U) is inserted into the lower drainage material 8 (L The construction method of the ground drainage structure is characterized in that it is erected on the upper surface of the upper end edge portion.

In the invention of claim 2, the upper end sides of the left and right column members 10, 10 of the combined body 39 are connected to each other until at least the lower side of the combined body 39 is embedded in the embankment 3. Ru Tei to.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

  The invention of claim 1 is a vertical orientation, arranged in a vertical direction, and has a plate shape embedded in the ground, upper and lower drainage materials, and left and right sides in the thickness direction of the upper and lower drainage materials. A pair of left and right pillars disposed in the vicinity of each side and embedded in the ground, and each upper end of each of the left and right pillars located on each side of the lower drainage material is an upper edge of the lower drainage material. It is located above.

  For this reason, when constructing the ground drainage structure, first, the lower side of the combined body of the lower drainage material and the left and right columnar members on each side of the lower drainage material is buried in the embankment and is made to stand on its own. Next, the lower edge of the upper drainage material is placed on the upper surface of the upper edge of the lower drainage material of the combined body in the self-supporting state. Insert the lower edge of the upper drainage material in between. Then, the lower edge portion of the upper drainage material is guided by being sandwiched between the upper end portions of the left and right column members, and a predetermined position in the width direction of the drainage material on the upper surface of the upper edge portion of the lower drainage material. Is positioned and placed.

  Therefore, since the standing by the placement of the upper drainage material on the upper surface of the upper edge of the lower drainage material is easily and quickly achieved, the construction work of the ground drainage structure can be facilitated.

  When the upper side of the lower drainage material embedded in the embankment and the lower side of the upper drainage material are further embedded in the embankment as described above, the upper drainage material is removed from a predetermined position on the upper surface of the upper edge of the lower drainage material. The lower end edge portion is prevented from being displaced due to the earth pressure of the embankment by sandwiching the lower end edge portion of the upper drainage material on the upper end side of the left and right column members. Therefore, also in this respect, the construction work of the ground drainage structure can be easily performed.

Moreover, it has the connection tool in which the recessed part opened toward upper direction so that the lower end edge part of the said upper waste_water | drain material was inserted was hooked on the upper end edge part of the said lower waste_water | drain material.

  For this reason, when placing the lower edge of the upper drainage material on the upper surface of the upper edge of the lower drainage material, the lower drainage of the upper drainage material is inserted into the concave portion of the connector. The lower end edge of the upper drainage material is positioned and placed with higher accuracy with respect to a predetermined position in the thickness direction of the drainage material on the upper surface of the upper end edge of the material.

  Therefore, since the standing of the upper drainage material with respect to a predetermined position on the upper surface of the upper end edge of the lower drainage material can be achieved more easily and quickly, the construction work of the ground drainage structure can be performed more easily.

Moreover, the water-permeable cover sheet | seat which extends toward each downward from each side surface of the said upper drainage material, and covers each side surface of the upper end edge part of the said lower drainage material is provided.

  Here, when trying to embed the upper side of the lower drainage material and the lower side of the upper drainage material erected on the upper surface of the upper edge of the lower drainage material in the embankment, after embedding, There is a possibility that clogging may occur due to the embankment of the embankment between the upper edge of the lower drainage material and the lower edge of the upper drainage material.

  However, the entry of earth and sand between the upper and lower drainage materials is prevented by the cover sheets, and clogging is prevented. Therefore, the drainage of the ground by each of the above drainage materials is maintained well.

Moreover, it is provided with a locking tool that is hooked on the upper edge of the lower drainage material and that locks the middle portions in the vertical direction of the left and right column members at a position lower than the upper end of the lower drainage material.

  For this reason, since the left and right column members are connected to each other so as to sandwich the lower drainage material, the connection between the lower drainage material and the left and right column members becomes strong. Therefore, when the lower side of the combined body of the lower drainage material and the left and right column members is buried in the embankment, the embedding can be stabilized, and the construction work of the ground drainage structure can be further facilitated. it can.

  Then, as described above, the upper drainage material is erected on the upper surface of the upper edge portion of the lower drainage material, and the upper edge portion of the lower drainage material is left and right by the pair of left and right cover sheets extending from the upper drainage material. When covering from each side, it is possible to prevent the locking tool from interfering with the covering operation of each cover sheet. Therefore, it is not necessary to detach the locking tool from the upper ends of the left and right column members, so that the construction work of the ground drainage structure can be further facilitated.

The invention of claim 2 is a plate-like shape that is vertically oriented and arranged in the vertical direction, and is embedded in the ground. The upper and lower drainage materials, and the left and right sides in the thickness direction of the upper and lower drainage materials. A pair of left and right pillars disposed in the vicinity of each side and embedded in the ground, and each upper end of each of the left and right pillars located on each side of the lower drainage material is an upper edge of the lower drainage material. It is a construction method of the ground drainage structure positioned above, and the lower side and upper side of the embankment are sequentially stacked from the upper surface on the ground base side of the ground, and the lower drainage material and the upper drainage material are sequentially stacked. However, when burying in the above embankment,
First, the lower drainage material is erected on the upper surface of the ground base side, and the left and right column members are erected on each side of the lower drainage material, and the upper surface of the ground base side is erected. The lower side of the combined body of the sewer material and the left and right column members is buried in the lower side of the above embankment to be independent,
Next, the lower edge of the upper drainage material is inserted between the upper end sides of the left and right column members, and the upper drainage material is erected on the upper surface of the upper edge of the lower drainage material. .

For this reason, when constructing the ground drainage structure, first, the lower side of the combined body of the lower drainage material and the left and right columnar members on each side of the lower drainage material is buried in the embankment and is made to stand on its own. Next, the lower edge of the upper drainage material is placed on the upper surface of the upper edge of the lower drainage material of the combined body in the self-supporting state. Insert the lower edge of the upper drainage material in between. Then, the lower edge portion of the upper drainage material is guided by being sandwiched between the upper end portions of the left and right column members, and a predetermined position in the width direction of the drainage material on the upper surface of the upper edge portion of the lower drainage material. Is positioned and placed.

Therefore, since the standing by the placement of the upper drainage material on the upper surface of the upper edge of the lower drainage material is easily and quickly achieved, the construction work of the ground drainage structure can be facilitated.

When the upper side of the lower drainage material embedded in the embankment and the lower side of the upper drainage material are further embedded in the embankment as described above, the upper drainage material is removed from a predetermined position on the upper surface of the upper edge of the lower drainage material. The lower end edge portion is prevented from being displaced due to the earth pressure of the embankment by sandwiching the lower end edge portion of the upper drainage material on the upper end side of the left and right column members. Therefore, also in this respect, the construction work of the ground drainage structure can be easily performed.

In addition, the upper end sides of the left and right column members of the combined body are connected to each other until at least the lower side of the combined body is embedded in the embankment.

  For this reason, in the above combination, since the lower drainage material is sandwiched between the left and right column members connected to each other at least until the lower side of the combination is embedded in the embankment, the drainage is also performed during the embankment operation. The material is sandwiched between the left and right column members. Therefore, when the lower side of this combination is buried in the embankment, the embedding can be made stable, and the construction work of the ground drainage structure can be made easier. Further, particularly when the periphery of the pillar material is compacted during the work of embankment, the upper end portions of the left and right pillar materials may be separated from each other, but such behavior of the pillar material can be prevented. Furthermore, it is possible to make the connection permanently connected, and in this case, it is possible to enhance the effect of preventing the displacement of the upper drainage material and the lower drainage material.

FIG. 6 is a partial perspective view illustrating Reference Example 1; FIG. 5 is a side sectional view of the whole, showing Reference Example 1; FIG. 3 is a partial enlarged view of FIG. 2 showing Reference Example 1; FIG. 4 shows Reference Example 1, and is a view taken along the line IV-IV in FIG. 3. FIG. 2 is a development view of the reference example 1 and shown in FIG. 1. It is a figure which shows the reference example 2 and corresponds to FIG. Example 1 is shown, (a) is a view corresponding to FIG. 4, (b) is a side view of (a). Example 2 is shown, (a)-(c) is a figure which shows each modification of a coupling tool.

  With respect to the ground drainage structure of the present invention, the object is to make it possible to more easily perform the construction work of the ground drainage structure in which the vertical drainage is placed in the vertical orientation and the lower drainage material is buried. Therefore, the form for carrying out the present invention is as follows.

  That is, the ground drainage structure is vertically oriented and arranged in the vertical direction, on the plate shape embedded in the ground, the lower drainage material, and the left and right sides in the thickness direction of the upper and lower drainage materials. And a pair of left and right pillar members that are respectively disposed in the vicinity and embedded in the ground. The upper ends of the left and right column members located on the sides of the lower drainage material are respectively positioned above the upper edge of the lower drainage material.

In addition, the ground drainage structure includes a connector that is hooked to the upper end edge of the lower drainage material and has a recess that opens upward to fit the lower end edge of the upper drainage material. A water-permeable cover sheet that extends downward from each side surface of the upper drainage material and covers at least each side surface of the upper end edge of the lower drainage material is provided. There is provided a locking device that is hooked on the upper edge of the lower drainage material and that locks the respective midway portions in the vertical direction of the left and right column members at a position lower than the upper end of the lower drainage material.
(Reference Example 1)

In order to describe the present invention in more detail, first, a reference example 1 according to the present invention will be described with reference to FIGS.

  In FIG. 2, reference numeral 1 denotes a ground, and the ground 1 has a ground base 2 located at the bottom thereof, a bank 3 laid on the horizontally extending upper surface of the ground base 2, and a predetermined interval in the vertical direction. A plurality of ground reinforcing materials 4 are provided, which are buried in the embankment 3 with P open and extend in the horizontal direction. Note that the ground reinforcing material 4 may not be provided.

  The ground base 2 is a natural ground or embankment, and the ground may be inclined. The ground reinforcing material 4 is called a geogrid or geotextile, and is formed on a porous and flexible sheet, and reinforces the embankment 3 to improve its strength.

  Hereinafter, the ground drainage structure for the ground 1 will be described.

  A drainage base material 7 extending in the horizontal direction is interposed between the upper surface of the ground base 2 and the lower surface of the embankment 3, and one end portion of the drainage base material 7 in the horizontal direction (surface direction) is located outside the ground 1. Communicated. In addition, a plurality of plate-shaped drainage materials 8 are provided in the vertical orientation, continuously arranged in the vertical direction, and embedded in the embankment 3. Each of the drainage materials 8 is a long body extending long in the horizontal direction, but may be a rectangular shape having a predetermined length. The drainage base material 7 has the same configuration as the drainage material 8, but may be composed of gravel or artificial blocks.

  Among the drainage materials 8, there is provided a connector 9 that allows the lower drainage materials 8 (U) and 8 (L) to be connected to each other in the vertical direction. A pair of left and right column members 10, 10 extending in the vertical direction and embedded in the ground 1 are disposed near the left and right sides in the thickness direction of the drainage material 8. A plurality of the connectors 9 and the left and right column members 10 and 10 are provided alternately in the longitudinal direction (horizontal direction) of each drainage material 8.

  1 and 3 to 5, each drainage material 8 has a water-permeable drainage material body 13 that extends vertically in the horizontal direction and has a strip shape, and the left and right side surfaces of the drainage material body 13. A pair of water-permeable left and right drainage sheets 14, 14 are provided. Further, each drainage material 8 includes an edge protection member 17 that integrally covers each longitudinal edge of the drainage material body 13 and each drainage sheet 14, and the edge protection material 17 as described above. Adhesive tape 18 connected to each drainage sheet 14 is provided.

  In particular, by providing the edge protection member 17, the both end portions in the longitudinal direction of the drainage materials 8 (the end portions when each drainage material 8 is continuously provided with another drainage material 8 in the longitudinal direction) Inflow of earth and sand into each drainage material 8 can be prevented. Furthermore, if the edge protection member 17 is provided at the upper end of the uppermost drainage material 8, the inflow of earth and sand from the upper end portion of the uppermost drainage material 8 into the drainage material 8 can be prevented.

  The drainage body 13 is made of resin such as high density polyethylene (HDPE) or polypropylene (PP) and has flexibility. Further, the drainage material body 13 has sufficient strength and rigidity so as to be able to counter large external forces such as earth pressure applied to each drainage material 8 from the outside.

  The drainage sheet 14 and the edge protection member 17 are made of a resin such as polypropylene, are made of a nonwoven fabric of long fibers, and have sufficient tensile strength. The adhesive tape 18 adheres the edge protection member 17 to the edge of each drainage sheet 14 with an adhesive.

  The edge protection member 17 may integrally cover the upper edge and the lower edge of the drainage body 13 and the drainage sheet 14. Further, the drainage sheets 14 and the edge protection member 17 may be integrally formed so as to have a bag shape including the drainage body 13.

  A pair of left and right water-permeable cover sheets 19, 19 extending from the lower outer surface of each drainage sheet 14 of the drainage material 8 to below the lower edge of the drainage material 8 are provided. These cover sheets 19 are made of the same material as the drainage sheet 14 and the edge protection material 17. Each cover sheet 19 may be integrally extended from the drainage sheet 14.

  The connector 9 includes a pair of left and right side plates 22, 22 that face each other in the thickness direction of the drainage material 8, and a connection plate 23 that connects the middle portions of the side plates 22 in the vertical direction. Yes. A groove-shaped upper recess 24 that opens upward is formed by the upper portion of each side plate 22 and the connecting plate 23, and a groove shape that opens downward by the lower portion of each side plate 22 and the connecting plate 23. A lower recess 25 is formed. The connector 9 may be made of resin or metal such as sheet metal. Moreover, the said connecting tool 9 may be long so that between the said upper drainage material 8 (U) and the lower drainage material 8 (L) can be connected continuously, In this way, it depends on earth pressure. It is possible to further enhance the effect of preventing the displacement of the upper drainage material 8 (U) and the lower drainage material 8 (L).

  The lower concave portion 25 of the connector 9 is fitted to a part of the upper edge of the lower drainage material 8 (L) in the longitudinal direction so that rattling does not occur, and the lower drainage material 8 (L) The connector 9 is hooked on a part of the upper edge portion in the longitudinal direction. On the other hand, a part of the lower end edge of the upper drainage material 8 (U) in the longitudinal direction is fitted into the upper concave portion 24 of the connector 9 so that rattling does not occur. The upper and lower drainage materials 8 (U) and 8 (L) are connected to each other by the connector 9.

  Each of the column members 10 includes a bar 28 having a circular cross section that is individually provided in the vicinity of the side of each drainage material 8 and the lateral sides of the upper and lower drainage materials 8 (U) and 8 (L). And a connecting member 29 for connecting the opposite ends of the lower bar members 28 and 28 to each other. In this case, the upper ends of the left and right bar members 28, 28 located on the sides of the drainage materials 8 are located above the upper edge of the drainage material 8.

  The connecting member 29 includes a pipe member 31 whose longitudinal axis is vertically oriented, and a partition body 32 that is provided in an intermediate part in the vertical direction of the pipe member 31 and partitions the upper and lower inner holes of the pipe member 31. Yes. The upper and lower bar members 28 and 28 are connected to each other by fitting the opposing ends of the upper and lower bar members 28 and 28 to the upper and lower inner holes of the pipe member 31 without rattling. Is done. The connecting material 29 may be made of resin, metal, or may be formed by bending a reinforcing bar material. Further, the connecting material 29 may be an adhesive tape or a wire material for connecting the opposite end portions of the upper and lower bar members 28, 28 to each other.

  In addition, about the said connecting tool 9 and the column material 10, although it mutually adjacent in the up-down direction among the said drainage materials 8, it demonstrated according to the figure as a related structure of the bottom drainage materials 8 (U) and 8 (L), The structures of the connecting member 9 and the column member 10 are the same as those related to the upper and lower drainage materials 8 and 8 that are adjacent to each other in the vertical direction.

  When the water W enters the ground 1 from the outside, such as when it rains, the water W sequentially flows down through the drainage materials 8 and flows into the drainage base material 7. To do. Next, after the water W flows in the drainage base material 7, the water W is drained to the outside of the ground 1 from one end thereof. Thereby, the ground 1 is maintained at a desired water content and is maintained at a predetermined strength.

  The construction method of the above ground drainage structure will be mainly described with reference to FIG.

  First, the lower drainage material 8 (L) is installed (standing) on the upper surface of the ground base portion 2 in the vertical orientation through the drainage base material 7. On the other hand, the bar members 28 of the left and right column members 10 and 10 are arranged in the vicinity of the left and right sides of the lower drainage member 8 (L), and the lower ends of the bar members 28 of the left and right column members 10 are connected to the drainage base material. 7 is penetrated and pierced into the ground base 2 to stand. At this time, the upper end portions of the bar members 28 of the left and right column members 10, 10 positioned above the upper end edge portion of the lower drainage material 8 (L) are temporarily locked together by the locking tool 35. Connect. Further, the midway portion in the longitudinal direction of each bar 28 of the left and right column members 10, 10 is bonded to the side surface of the lower drainage material 8 (L) with an adhesive tape 36. Then, the lower drainage material 8 (L) and the rods 28 of the left and right column members 10 and 10 are erected on the upper surface of the ground base 2.

  In addition, in order to prevent earth and sand from flowing in through the hole formed by allowing the lower end portion of each bar 28 to penetrate the drainage base material 7, along the periphery of each bar 28 of the drainage base material 7. It is preferable to install a woven fabric or a non-woven fabric to cover the hole.

  Therefore, the lower side of the combined body 39 of the lower drainage material 8 (L) and the left and right column members 10, 10 erected on the upper surface of the ground base 2 is embedded in the lower side 3 L of the embankment 3, The combination body 39 is self-supported on the lower side 3L of the bank 3. On the other hand, the connector 9 is hooked on a part of the upper edge of the lower drainage material 8 (L) in the longitudinal direction.

  Therefore, in the combined body 39, the lower drainage material 8 (L) is sandwiched between the left and right column members 10 and 10 connected to each other by the locking tool 35 and the adhesive tape 36, and the lower drainage material 8 (L) is sandwiched between the left and right column members 10, 10. Therefore, when the lower side of this combination 39 is embedded in the lower side 3L of the embankment 3, this embedding can be stabilized, and the construction work of the ground drainage structure can be made easier.

  Next, the lower edge of the upper drainage material 8 (U) is placed at a predetermined position in the thickness direction of the drainage material 8 on the upper surface of the upper edge of the lower drainage material 8 (L). The upper drainage material 8 (U) is erected on the lower drainage material 8 (L). In this case, the lower end edge of the upper drainage material 8 (U) is inserted between the upper end portions of the bar members 28 of the left and right column members 10 and 10 from above. Then, the lower end edge portion of the upper drainage material 8 (U) is guided by being sandwiched between the upper end portions of the bar members 28 of the left and right column members 10 and 10, and the lower drainage material 8 (L) It is positioned and placed at a predetermined position on the upper surface of the upper edge.

  Therefore, since the standing by placing the upper drainage material 8 (U) with respect to a predetermined position on the upper surface of the upper edge of the lower drainage material 8 (L) can be achieved easily and quickly, the construction of the ground drainage structure is performed. Work can be done easily.

  As described above, when the lower edge of the upper drainage material 8 (U) is placed on the upper surface of the upper edge of the lower drainage material 8 (L), the lower edge of the upper drainage material 8 (U) Is inserted into the upper concave portion 24 of the connector 9. Then, the lower end edge of the upper drainage material 8 (U) is positioned and placed more accurately with respect to a predetermined position on the upper surface of the upper end edge of the lower drainage material 8 (L).

  Therefore, since the standing of the upper drainage material 8 (U) with respect to a predetermined position on the upper surface of the upper edge of the lower drainage material 8 (L) can be achieved more easily and quickly, the construction work of the ground drainage structure is performed. However, it can be done more easily.

  Further, as described above, when the upper drainage material 8 (U) is erected on the upper surface of the upper edge of the lower drainage material 8 (L), the lower side of the upper drainage material 8 (U) The upper drainage material 8 (U) is caused by at least one of the action of being sandwiched by the upper end side of each of the bars 10 and 10 and the action of being fitted into the upper recess 24 of the connector 9. It is made to become independent on the lower drainage material 8 (L).

  Therefore, after that, an operator holds the upper drainage material 8 (U) and keeps the upper drainage material 8 (U) in a vertical posture on the lower drainage material 8 (L). Therefore, the construction work of the ground drainage structure can be further facilitated.

  As described above, when the upper drainage material 8 (U) is erected on the upper surface of the upper edge of the lower drainage material 8 (L), a pair of left and right covers extending from the upper drainage material 8 (U) The sheets 19, 19 cover the upper edge of the lower drainage material 8 (L) and the connector 9 from the left and right sides, respectively.

  Here, as described above, when the upper drainage material 8 (U) is erected on the upper surface of the upper edge of the lower drainage material 8 (L), or each cover sheet 19 is the lower drainage material 8 (L). When the upper edge portion of the upper portion and the connector 9 are covered from the side, the locking member 35 is obstructive to the standing work of the upper drainage material 8 (U) and the covering operation of each cover sheet 19. Become. Therefore, the locking member 35 is detached from the upper end portions of the respective bar members 28 of the left and right column members 10, 10, and the temporary connection between the upper end portions of the respective bar members 28 of the left and right column members 10, 10 is released. To do.

  Further, as described above, the upper drainage material 8 (U) is erected on the upper surface of the upper end edge of the lower drainage material 8 (L), while the left and right columns are disposed in the vicinity of the side of the upper drainage material 8 (U). The other bars 28 of the materials 10, 10 are arranged, and the lower ends of these other bars 28, 28 are arranged on the upper ends of the bars 28 embedded in the lower side 3L of the embankment 3 as described above. They are connected by the connecting material 29 to be independent.

  And as shown in FIG. 1, similarly to having formed the combination body 39 by the above-mentioned lower drainage material 8 (L), each other bar material of the upper drainage material 8 (U) and the left and right pillar materials 10 and 10. 28 and another combination body 40 are erected on the combination body 39.

  And the upper side of the combination 39 and the lower side of the other combination 40 erected on the combination 39 are embedded in the upper side 3U of the embankment 3 so that the other combination 40 is It is made to stand on the upper side 3U of the embankment 3. In this case, the lower edge of the upper drainage material 8 (U) of the other combined body 40 is the upper edge of the lower drainage material 8 (L) due to earth pressure from the upper side 3U of the embankment 3 in which it is embedded. Attempts to deviate from a predetermined position on the upper surface of the part. However, as described above, this positional shift is caused by the action that the lower side of the upper drainage material 8 (U) is sandwiched between the upper end portions of the bar members 28 of the left and right column members 10 and 10 and the connection tool 9. This is prevented by at least one of the actions to be fitted into the upper recess 24.

  Further, as described above, when trying to embed the upper side of the combination 39 and the lower side of the other combination 40 standing on the combination 39 in the upper side 3U of the embankment 3, After embedding, the upper side 3U of the embankment 3 is located between the upper edge of the lower drainage 8 (L) of the combination 39 and the lower edge of the upper drainage 8 (U) of the other combination 40. May cause clogging.

  However, entry of earth and sand between the upper and lower drainage materials 8 (U) and 8 (L) is prevented by the cover sheets 19, and clogging is prevented. Therefore, the drainage of the ground 1 by the upper and lower drainage materials 8 (U) and 8 (L) is well maintained.

  Next, the upper drainage material 8 (U) is regarded as the lower drainage material 8 (L), and another upper drainage material 8 is erected on the upper surface of the upper edge of the lower drainage material 8 (L). Hereinafter, if each drainage material 8 is sequentially embedded in the embankment 3 as described above, the construction work of the ground drainage structure is completed.

  And according to the construction method of the ground drainage structure, since the upper and lower drainage materials 8 (U), 8 (L) are embedded in the ground 1 with high accuracy, the ground 1 can be placed in the ground 1 in rainy weather. When the water W enters from the outside, the water W is drained to the outside of the ground 1 by flowing down the upper and lower drainage materials 8 (U) and 8 (L) sequentially. Thereby, the ground 1 is maintained at a desired water content and is maintained at a predetermined strength.

FIG. 6 below shows Reference Example 2 of the present invention, and FIGS. 7 and 8 show Examples 1 and 2 of the present invention . Each of these reference examples and examples is common in many respects to the configuration and operational effects of the reference example 1. Therefore, regarding these common items, common reference numerals are attached to the drawings, and redundant description thereof is omitted, and different points are mainly described. In addition, the configurations of the respective portions in each of the reference examples and examples may be combined in various ways in light of the object and effect of the present invention.
(Reference Example 2)

In order to describe the present invention in more detail, Reference Example 2 will be described with reference to FIG.

  In FIG. 6, the lower edge of the lower drainage material 8 (L) is sandwiched between the steel plates 42 and 42 that are a pair of left and right angles installed on the upper surface of the ground base 2 via the drainage base material 7. Each die steel 42 is bonded to the upper surface of the drainage base material 7 with an adhesive tape 44, and the lower end portions of the left and right column members 10, 10 are bonded to the respective die steel 42 with another adhesive tape 45. . Moreover, the said locking tool 35 is comprised with the adhesive tape.

In order to describe the present invention in more detail, Example 1 will be described with reference to FIG.

  In FIG. 7, the adhesive tape 18 is a double-sided tape or a hook-and-loop fastener, and is interposed between the end edge portion of each drainage sheet 14 and the end edge protection material 17. They are connected to each other by an adhesive tape 18.

  On the other hand, it is hooked on the upper edge of the lower drainage material 8 (L), and the middle portions in the vertical direction of the left and right column members 10 and 10 are respectively positioned lower than the upper end of the lower drainage material 8 (L). A locking tool 35 to be locked is provided. Specifically, the locking tool 35 protrudes laterally from the lower end of each side plate 22 of the connecting tool 9, that is, the connecting tool 9 and the locking tool 35 are integrally formed. Has been.

  And according to the said structure, since the said right-and-left pillar materials 10 and 10 are mutually connected so that the said lower drainage material 8 (L) may be pinched | interposed by the said locking tool 35, these lower drainage material 8 (L) and The mutual connection with the left and right column members 10, 10 becomes strong. Therefore, when the lower side of the combined body 39 of the lower drainage material 8 (L) and the left and right column members 10 and 10 is buried in the embankment 3, this embedding can be made stable, and the ground drainage correspondingly. Construction work of the structure can be further facilitated.

  Then, as described above, the upper drainage material 8 (U) is erected on the upper surface of the upper edge of the lower drainage material 8 (L), and a pair of left and right covers extending from the upper drainage material 8 (U) When the upper edge of the lower drainage material 8 (L) and the connector 9 are respectively covered from the left and right sides by the sheets 19, 19, the locking device 35 against the covering operation of each cover sheet 19. Is prevented from getting in the way. Therefore, it is not necessary to disengage the locking tool 35 from the upper ends of the bars 28 of the left and right column members 10, 10, so that the construction work of the ground drainage structure can be further facilitated.

In order to describe the present invention in more detail, the second embodiment will be described with reference to FIG.

  In FIG. 8 (a), the connecting tool 9 is formed by cutting and raising from one plate material to form the side plates 22 and the connecting plate 23, whereby the connecting tool 9 having a simple configuration is obtained. Outer flanges 47 are formed on the upper and lower edges of one of the left and right side plates 22, 22, and through holes 48 are formed in each of the outward flanges 47. The outward flange 47 and the through hole 48 may be omitted.

  8B, one of the left and right side plates 22, 22 of the connector 9 has the same configuration as that of the above-described (a), but the other side plate 22 has a pair of front and rear leaf springs. It is formed with.

  For this reason, the upper edge of the lower drainage material 8 (L) and the lower edge of the upper drainage material 8 (U) fitted in the recesses 24 and 25 are elastic by the left and right side plates 22 and 22, respectively. Occurrence of rattling is more reliably prevented.

  In FIG. 8 (c), the connector 9 has substantially the same configuration as that of the above (b), but a pair of front and rear leaf springs are integrally formed.

DESCRIPTION OF SYMBOLS 1 Ground 2 Ground base 3 Filling 3U Upper side 3L Lower side 4 Ground reinforcement material 7 Drainage base material 8 Drainage material 8 (U) Upper drainage material 8 (L) Lower drainage material 9 Connecting tool 10 Pillar material 13 Drainage material main body 14 Drainage Sheet 17 Edge protection member 18 Adhesive tape 19 Cover sheet 24 Recess 28 Bar 29 Connection material 35 Locking tool 36 Adhesive tape 39 Combination 40 Other combination P Interval W Water

Claims (2)

Each of the vertical orientations are arranged in the vertical direction, and are arranged in the vicinity of the left and right sides in the thickness direction of the upper and lower drainage materials, and the upper and lower drainage materials embedded in the ground. A pair of left and right pillars embedded in the ground, and each upper end of the left and right pillars located on each side of the lower drainage material is positioned above the upper edge of the lower drainage material, respectively .
Hooked to the upper edge of the upper SL under drainage material, comprises a connecting device with a recess formed to open upward so as to fit the bottom end portion of the upper drainage material,
Each extends downward from each side of the upper SL on drainage material, provided the water-permeable cover sheet covering each side of at least the upper edge portion of the lower drain boards,
Hooked to the upper edge of the upper SL under drainage material, comprising the locking tool that locked respectively engaging the respective middle portions in the vertical direction of the right and left pillar at lower position than the upper end of the lower drain boards earth board drainage structure shall be the. Each of the vertical orientations are arranged in the vertical direction, and are arranged in the vicinity of the left and right sides in the thickness direction of the upper and lower drainage materials, and the upper and lower drainage materials embedded in the ground. A pair of left and right pillars embedded in the ground, and each upper end of the left and right pillars located on each side of the lower drainage material is positioned above the upper edge of the lower drainage material. A method for constructing a ground drainage structure, in which the lower side and the upper side of the embankment are sequentially stacked from the upper surface on the ground base side of the ground, and the lower drainage material and the upper drainage material are sequentially piled up and embedded in the embankment. ,
First, the lower drainage material is erected on the upper surface of the ground base side, and the left and right column members are erected on each side of the lower drainage material, and the upper surface of the ground base side is erected. The lower side of the combined body of the sewer material and the left and right column members is buried in the lower side of the above embankment to be independent,
Next, the lower edge of the upper drainage material is inserted between the upper end sides of the left and right column members, and the upper drainage material is erected on the upper surface of the upper edge of the lower drainage material ,
Each upper end between the left and right pillar above Symbol combination thereof, between the lower side of at least the combination body to be embedded in the embankment, the construction method of the earth plate drainage structure you characterized in that so as to couple .

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