JPH08296242A - Retaining wall with parallel cross arrangement - Google Patents

Abstract

PURPOSE: To prevent the breakage of a retaining wall itself by providing wooden horizontal beam material and counterfort beam material, providing a fitting recessed part in the cross part of the counterfort beam material, and freely fitting the horizontal beam material across to the fitting recessed part. CONSTITUTION: A plurality of counterfort beam materials 2 are arranged with a space in the longitudinal direction of a retaining wall A on a concrete foundation K preliminarily placed in a retaining wall constructing site G, and a horizontal beam material 1 is horizontally erected with its lateral side parts being fitted to the fitting recessed parts of the counterfort beam materials 2, 2. A plurality of counterfort beam materials 2 are then arranged on both the horizontal beam materials 1, 1, and alternately superposed, whereby they are arranged in parallel crosses to construct a retaining wall body, and a filler 5 is filled in the retaining wall body. Since the horizontal beam materials 1 are freely fitted across to the fitting recessed parts of the counterfort beam materials 2, a bias load, if added to the retaining wall body, is dispersed by the fitting parts with play to make the retaining wall bendable, whereby it can be applied to various movements such as the differential settlement of the ground in the retaining wall constructing site G to prevent the breakage of the retaining wall itself.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double girder retaining wall.

[0002]

2. Description of the Related Art Conventionally, as a form of a double girder retaining wall, a pair of front and rear concrete transverse girder members extending in the longitudinal direction of the retaining wall and a plurality of concrete holding girders extending in a direction intersecting with both transverse girder members are provided. There is a material constructed by stacking timber and wood alternately to form a cross.

[0003]

However, since the above-mentioned girder retaining wall is formed by assembling a concrete transverse girder material and a concrete retaining girder material in the shape of a girder, the retaining wall as a whole is formed. Although it is firmly constructed, it does not flex, so it cannot cope with uneven settlement of the ground or vertical or horizontal ground shaking during an earthquake, and stress concentration occurs in some areas, which tends to cause collapse. is there.

Further, in the construction work of the double girder retaining wall,
Since each girder material is made of concrete and the weight of each girder material is large, a transport device is required for transportation, but in the case of restoration work on the hillside where there are only sidewalks, the transport device cannot be carried in and it is unavoidable that human power is required. There is a problem that it has to be transported by.

Further, since each girder has a heavy weight made of concrete, there is a problem that the retaining wall cannot be constructed when the ground at the retaining wall construction site is weak.

[0006]

Therefore, in the present invention, a pair of front and rear cross girder members extending in the longitudinal direction of the retaining wall and a plurality of guard girder members extending in a direction intersecting with both cross girder members are alternately arranged. The retaining wall main body is formed by stacking them in a cross girder shape and filling the inside of the retaining wall main body with the filling material, and the transverse girder material and the guard girder material are made of wood, respectively. A cross girder retaining wall is characterized in that a fitting recess is formed at the intersection of one of the girders, and the other girder is intersected with the fitting recess to allow loose fitting. Is.

According to the present invention, a water-permeable sheet for preventing leakage of the embedded material is stretched on the inner surface of the mirror portion of the retaining wall body.
A sheet for vegetation that incorporates plant seedlings and seeds and fertilizer into the sheet body as a sheet for preventing leakage of inside material.
The use of sandbags for vegetation that mixed soil, plant seeds, and fertilizers as the inlay material, and that plants with good rooting vegetation were planted on the upper surface of the infill material forming the top end of the double girder retaining wall. It has characteristics.

[0008]

[Function] When constructing a double girder retaining wall, a plurality of retaining girder materials are placed at intervals in the longitudinal direction of the retaining wall on a concrete foundation that has been placed in advance at the retaining wall construction site. A pair of front and rear cross girders are crossed horizontally on top of each other, and multiple girders are placed on both cross girders at intervals in the longitudinal direction of the retaining wall. The retaining wall main body is formed by assembling to the above and the inside of the retaining wall main body is filled with the material.

At this time, the cross girder material and the girder material are made of wood, respectively, and a fitting recess is formed at the intersection of at least one of the girder material and the girder material to form the fitting recess. Since the other girder material is cross-fitted and is loosely fitted, even if an eccentric load acts on the retaining wall body, the eccentric load is dispersed at the fitting part with play to form the retaining wall body. Can have

Therefore, it is possible to adapt to various movements such as uneven settlement of the ground at the place where the retaining wall is constructed and vertical or horizontal shaking of the ground during an earthquake, and to prevent the retaining wall itself from collapsing. You can

And, also in the construction work of the double girder retaining wall,
Since each girder is made of wood with a specific gravity of approximately 1/4 to 1/5 that of concrete, it can be easily carried by human power, and restoration work on hillsides where it is difficult to carry in a carrying device can be done easily. be able to.

Further, since each wooden girder material is significantly lighter than that made of concrete, it can be constructed even when the ground at the retaining wall construction site is weak.

Further, in the case where the sheet for preventing leakage of the insert material having water permeability is stretched on the inner surface of the mirror portion of the retaining wall body, the sheet can prevent the insert material from leaking from the inside of the retaining wall body. it can.

When a sheet for vegetation in which seedlings and seeds of a plant are embedded in the sheet body is used as the sheet for preventing leakage of the filling material, the plant can be propagated by the sheet for vegetation. , It is possible to green the retaining wall and beautify the environment.

When a sandbag for vegetation, which is a mixture of soil, plant seeds and fertilizer, is used as an inlay material, the plant can be propagated by the sandbag for vegetation. And the environment can be beautified.

When a plant with good rooting ability is planted on the upper surface of the insert material forming the crown end of the retaining wall, the retaining wall can be greened and the environment can be beautified. By strengthening the retaining wall, it is possible to strengthen the retaining wall itself and restore the landslide area and landslide area in a short time.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show a well girder retaining wall A according to the present invention.
FIG. 1 is a side view showing the construction form of FIG. 1, FIG. 1 shows a construction form of a double girder retaining wall A as a collapse prevention wall of a steep slope on a hillside B, and FIG. 2 is a road opened by cutting the slope C Fig. 3 shows the construction of the double girder retaining wall A as a road retaining wall for protecting D (especially forest roads), and Fig. 3 shows the restoration of the hillside B and the landslide area, so-called collapse. A plurality of well girder retaining walls A are constructed in a stepwise manner along the hillside B, and a plant E having good rooting ability at the top end a of each well girder retaining wall A.
And turf are planted, and the mirror part b of each well girder retaining wall A is covered with a birch or upholstered grass F to restore the current state within a certain period of time. The construction form of the retaining wall A is shown.

Next, the structure of the above-mentioned double girder retaining wall A will be described with reference to FIGS.

That is, as shown in FIGS. 4 to 6, the double girder retaining wall A intersects with a pair of front and rear cross girder members 1, 1 extending in the longitudinal direction of the retaining wall and both cross girder members 1, 1. The retaining wall body 3 is formed by alternately stacking a plurality of beam members 2 and 2 extending in the direction and assembling them in a cross beam shape, and the mirror portion b of the retaining wall body 3 is formed.
A permeable material leakage preventing sheet 4 having a water permeability is stretched on the inner surface of the above, and the retaining wall body 3 is filled with the intermediate material 5.

As shown in FIGS. 4 to 6, the cross beam member 1 is made of wood in the shape of a rectangular rod, and has stepped recesses 1a, 1 for connection at both end portions.
In addition to forming a, the reinforcing bar insertion holes 6 and 6 are formed at both end portions in the vertical direction. However,
As for the cross beam member 1 located at the outer end, as shown in FIG. 4B, the connecting stepped recess 1a is formed only at the inner end which is the connecting end.

In this way, when a plurality of cross beam members 1 are connected in the longitudinal direction, the connecting stepped recesses 1a, 1a respectively formed at the adjacent end parts are fitted from above and below, and Reinforcing bar insertion holes 6 and 6 formed at the respective end portions are made to coincide with each other in the vertical direction so that they can communicate with each other.

Here, the transverse beam 1 can be designed to have a horizontal length of 995 mm, a vertical width of 150 mm, and a front-back width of 85 mm, for example, so that it can be easily carried by human power. Preferably.

As shown in FIGS. 4 to 6, the retaining member 2 is made of wood in the shape of a rectangular rod, and is formed with fitting recesses 2a, 2a at the front and rear portions of the upper and lower surfaces, respectively. 2
Reinforcing bar insertion holes 7 and 7 are formed at positions approximately in the center of a and 2a by penetrating in the vertical direction. However, as for the gear member 2 located at the lowermost stage, as shown in FIG. 4B, fitting recesses 2a and 2a are formed in the front and rear portions of only the upper surface.

In this way, the beam material 2 is the same as the beam material 2.
When stacking the cross girder materials 1 on top of each other,
The end portions of the cross beam 1 are loosely fitted into the fitting recesses 2a formed on the upper surfaces of the end portions of the rails from above, and the rebar insertion holes 6 and 7 formed at the respective end portions are vertically aligned with each other. When the stacked girder materials 2 are stacked on the cross girder 1 so as to intersect with each other, when the stacked girder materials 2 are stacked, the upper surface of the end part of the girder material 1 and the lower surface of the end part of the girder material 2 are connected. The fitting recesses 2a formed in the above are crossed and loosely fitted, and the reinforcing bar insertion holes 6 and 7 formed at the respective end portions can be vertically matched to communicate with each other.

Here, the size of the support girder 2 can be, for example, a longitudinal length in the front-rear direction of 795 mm, a vertical width of 180 mm, and a lateral width of 100 mm, and is designed to be easily carried by human power. Preferably.

The transverse girder material 1 and the retaining girder material 2 are respectively subjected to waterproofing treatment and antiseptic treatment.

Next, the construction procedure of the double girder retaining wall A will be described with reference to FIG.
This will be described with reference to FIG.

As shown in FIG. 4A, a part of the hillside B is cut to form a retaining wall construction place G, concrete is placed in the retaining wall construction place G, and a foundation K is constructed. Same basis K
Reinforcing bar insertion holes 8 are formed by a drill on the upper surface of the plate at intervals in the front-rear direction and the left-right width direction that is the longitudinal direction of the retaining wall. The reinforcing bar 9 functioning as a tool is inserted and set upright.

At this time, the interval between the reinforcing bar insertion holes 8 adjoining in the left-right width direction is made to coincide with the interval between the reinforcing bar insertion holes 6, 6 formed at the left and right end portions of the cross beam 1, and at the same time, in the front-rear direction. The intervals between the reinforcing bar insertion holes 8 facing each other are made to match the intervals between the reinforcing bar insertion holes 7 formed at the front and rear ends of the beam member 2, respectively.

As shown in FIG. 4 (a), the reinforcing bar insertion holes 7, 7 formed at the front and rear ends of the beam member 2 are aligned with the reinforcing bars 9, 9 facing forward and backward, and the reinforcing bar insertion holes 7, The reinforcing bars 9 and 9 are inserted through 7, and the supporting girder material 2 is slid down along the reinforcing bars 9 and 9 and placed on the foundation K.

In the same manner, as shown in FIG. 4B, a predetermined number of the fixed beam members 2 are sequentially placed adjacent to each other in the right direction on the foundation K.

As shown in FIG. 4B, the reinforcing bar insertion holes 6, 6 formed at the left and right side end portions of the cross beam 1 are aligned with the reinforcing bars 9, 9 adjacent in the left-right width direction, and the reinforcing bar insertion holes are inserted. For inserting the reinforcing bars 9 and 9 into the holes 6 and 6 and sliding down the cross girder material 1 along both the reinforcing bars 9 and 9 to fit the storage girder materials 2 and 2 that are adjacent in the left-right width direction. The left and right side end portions of the cross beam member 1 are loosely fitted in the recesses 2a, 2a and horizontally mounted.

At this time, the horizontal girder members 1 are placed as a front and rear pair on the supporting girder members 2 and 2, and then, in FIG. The horizontal girder members 1, 1 adjacent to each other in the left-right width direction are connected to each other by fitting the connecting stepped recessed portions 1a, 1a formed at the ends in the vertical direction.

As shown in FIG. 4B, on the pair of front and rear cross girder members 1, 1 connected in a rail shape in the left-right width direction,
Retaining members 2 are inserted into the reinforcing bar insertion holes 7, 7 through which the reinforcing bars 9 and 9 are inserted and slid down to form recesses for fitting formed on the lower surfaces of the supporting beams 2 on the respective ends of the horizontal beam members 1 and 1. 2a and 2a are loosely fitted and placed horizontally.

Similarly, as shown in FIG. 4B, a predetermined number of auxiliary beam members 2 are successively placed on the horizontal beam members 1 and 1 so as to be adjacent to each other in the right direction.

As shown in FIG. 5, the retaining wall body 3 is assembled by repeating the above-mentioned work.

As shown in FIG. 6A, the retaining wall body 3
Is a stack girder material 2 and a transverse girder material 1 which are stacked and assembled in three stages, respectively, and then a strip-shaped insert material leakage prevention sheet 4 is hung along the mirror portion b of the retaining wall body 10. The lower end portion 4a of the sheet 4 is brought into surface contact with the upper surface of the foundation K, and a predetermined portion of the sheet 4 is fixed to each girder member 1, 2 by nailing or the like.

As the sheet 4 for preventing leakage of the embedded material, a chemical fiber having water permeability and high tensile strength can be used.

As shown in FIG. 6 (a), while the filling wall body 3 is filled with the filling material 5, the filling material 5 is also placed in the space between the rear side of the holding wall body 3 and the slope of the hillside B. To fill.

At this time, since the retaining wall main body 3 is assembled by the relatively lightweight cross girder material 1 and the retaining girder material 2 and is supported by the reinforcing bar 9, it is good in self-supporting property. The filling work of 5 can be performed with confidence.

As shown in FIG. 6B, the horizontal girder material 1 and the holding girder material 2 are further stacked to extend the retaining wall body 3 to a predetermined height, and the mirror portion b of the retaining wall body 3 is extended. The sheet 4 for preventing leakage of the embedded material is stretched in the same manner as above.

As shown in FIG. 6B, the retaining wall body 3 that has been expanded is filled with the filling material 5, and the retaining wall body 3 is also provided.
The space between the back of the hillside and the slope of the hillside B is also filled with the filling material 5. At this time, the upper end portion 4b of the sheet 4 for preventing leakage of the embedded material
Is embedded in the upper layer portion of the insert material 5, and the top end portion 4b is filled with the insert material 5 to form the top end portion a.

Then, as shown in FIGS. 1 to 3, a plant E having a good rooting property (for example, Yabushi) can be vegetated on the top end a. In this case, the retaining wall can be greened and the environment beautified, and the plant E
By strengthening the roots, it is possible to strengthen the retaining wall itself and restore the landslide area and landslide area in a short time. In addition, if the upper end portion 4b of the inlay material leakage prevention sheet 4 interferes with vegetation, it can be cut and removed.

Here, the sheet 4 for preventing leakage of the filling material is a vegetation obtained by embedding seedlings or seeds of manure and seeds and fertilizer in a sheet body made of a chemical fiber having water permeability and high tensile strength. Sheet can be used, and in this case, as shown in FIGS. 1 and 3, since the plant can be propagated on the mirror part b of the retaining wall main body 3 by the vegetation sheet, Greening of walls and beautification of the environment can be achieved.

As described above, the double girder set retaining wall A according to this embodiment can be constructed, and the double girder set retaining wall A can be constructed depending on the purpose of use. The construction form shown in can be adopted.

FIGS. 7 and 8 show a corrugated girder retaining wall A as another embodiment.
As part of the vegetation sandbag 10 formed by bagging the mixed material 10a, which is a mixture of soil, plants (for example, plowwood) seeds and fertilizer, is formed in the retaining wall body 3 with an opening of the mirror portion b. The vegetation sandbags 10 on the uppermost stage are stacked in order to be filled with, and a large one is placed to form the top end portion a.

By doing so, plants can be propagated respectively on the top end portion a and the mirror portion b of the retaining wall main body 3 by the sandbags 10 for vegetation, and in this case also, the retaining wall is greened and the environment is beautified. Can be achieved.

Further, when such a sandbag 10 for vegetation is used, it is not necessary to extend the sheet 4 for preventing leakage of the embedded material.

FIG. 9 shows a well girder retaining wall A as another embodiment. In the well girder retaining wall A, vegetation sandbags 10 are piled up in the retaining wall main body 3 as inserts 5. Are filling.

Except for the one placed on the uppermost stage, the sandbag 10 for vegetation contains a part of the mixed material 10a only on the side facing the mirror part b, and the infill material 5 in the remaining part. Then, only the mixed material 10a is accommodated in the vegetation sandbag 10 that forms the uppermost roof end a. In this way, the labor for filling the retaining wall main body 3 with the inlaying material 5 and the labor for tensioning the inlaying material leakage prevention sheet 4 are saved, and the retaining wall construction work efficiency is improved, and the top end a The plants are bred on the mirror part b and the mirror part b, respectively, so that the retaining wall can be greened and the environment can be beautified.

In this embodiment, the fitting recess 2a is formed in the retaining girder member 2, but the fitting recess may be formed in the cross girder member 1, and the girder members 1 and 2 may be formed. You may form a fitting recess, respectively.

[0053]

According to the present invention, the following effects can be obtained.

In the present invention according to claim 1, the cross girder material and the girder material are made of wood, respectively, and the fitting recess is formed at the intersection of at least one of the girder material and the girder material. Therefore, even if an unbalanced load is applied to the retaining wall body, the unbalanced load is dispersed in the fitting part with play because the other girder material is loosely fitted in the fitting recess. Therefore, it is possible to give the retaining wall body flexibility.

Therefore, it is possible to deal with various movements such as uneven settlement of the ground at the place where the retaining wall is constructed and vertical or horizontal shaking of the ground during an earthquake, and to prevent the retaining wall itself from collapsing. You can

And, also in the construction work of the double girder retaining wall,
Since each girder is made of wood with a specific gravity of approximately 1/4 to 1/5 that of concrete, it can be easily carried by human power, and restoration work on hillsides where it is difficult to carry in a carrying device can be done easily. be able to.

Furthermore, since each wooden girder material is significantly lighter than that made of concrete, it can be constructed even when the ground at the retaining wall construction site is weak.

According to the second aspect of the present invention, since the sheet for preventing leakage of the water-permeable ingot material is stretched on the inner surface of the mirror portion of the retaining wall body, the sheet allows the intruder material to be removed from the inside of the retaining wall body. Leakage can be prevented.

According to the third aspect of the present invention, since the sheet for preventing leakage of the filling material is a sheet for vegetation in which seedlings and seeds of the plant and fertilizer are embedded in the sheet body, the sheet for vegetation As a result, plants can be propagated, so that the retaining wall can be greened and the environment beautified.

In the present invention according to claim 4, since a vegetative sandbag in which soil, plant seeds and fertilizer are mixed is used as an inlay material, the plant can be propagated by the vegetative sandbag. This makes it possible to green the retaining wall and beautify the environment.

In the present invention according to claim 5, since a plant with good rooting is vegetated on the upper surface of the filling material forming the top end of the double girder retaining wall, the retaining wall is greened and the environment is beautified. In addition to strengthening the retaining wall itself and restoring the hillside collapsed areas and landslide areas, the rooting of the plant can be completed in a short time.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional side view of a double girder retaining wall according to the present invention.

FIG. 2 is a cross-sectional side view showing another construction of the retaining girder retaining wall.

FIG. 3 is a sectional side view showing another construction of the same girder retaining wall.

FIG. 4 is an explanatory diagram of a procedure for constructing a retaining wall for the same girder girder.

FIG. 5 is a perspective view of a retaining wall main body of the retaining wall of the same girder set.

FIG. 6 is an explanatory diagram of a procedure for constructing a retaining wall of the same girder girder.

FIG. 7 is a cross-sectional side surface explanatory view of a double girder retaining wall as another embodiment.

8 is a cross-sectional view taken along the line II of FIG.

FIG. 9 is a cross-sectional side view of a double girder retaining wall as another embodiment.

[Explanation of symbols]

 A Cross girder retaining wall 1 Cross girder material 2 Retaining girder material 3 Retaining wall body 4 Retaining material leakage prevention sheet 5 Retaining material 6 Rebar insertion hole 7 Rebar insertion hole 8 Rebar insertion hole 9 Reinforcing bar 10 Vegetation sandbag

Claims (5)

[Claims] 1. A pair of cross girder members extending in the longitudinal direction of the retaining wall, and a plurality of retaining girders extending in a direction intersecting with both cross girder members are alternately stacked and assembled in a cross girder shape. The wall body is formed, and the retaining wall body is filled with filling material, and the cross girder material and the girder material are made of wood, respectively. A fitting girder retaining wall, characterized in that a fitting recess is formed and the other fitting is cross-fitted into the fitting recess to allow loose fitting. 2. The double girder retaining wall according to claim 1, wherein a water-permeable sheet for preventing leakage of the embedded material is stretched on the inner surface of the mirror portion of the retaining wall main body. 3. The girder retaining wall according to claim 2, wherein a sheet for vegetation in which seedlings or seeds of a plant and fertilizer are incorporated in the sheet body is used as the sheet for preventing leakage of the filling material. 4. The girder retaining wall according to claim 1, wherein a sandbag for vegetation, which is a mixture of soil, plant seeds and fertilizer, is used as the filling material. 5. The well-structured retaining wall according to claim 2, wherein a plant having a good rooting property is planted on the upper surface of the insert material forming the top end of the well-structured retaining wall.