JP2009203794A - Concrete block for retaining wall, and construction method of retaining wall using the block - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide concrete blocks for a retaining wall excelling in shortening a construction period and in reducing a construction cost by dispensing with wooden form installation work for rust-proofing of H-shaped steel piles, and attendant ground excavation work in retaining wall construction using the H-shaped steel piles as posts and fitting and piling concrete blocks in the clearances and also dispensing with work of providing a cut-off wall beforehand in retaining wall construction in a seashore or riverbank area. <P>SOLUTION: The concrete blocks for the retaining wall and its construction method comprise providing both right and left sides of the concrete block 1 with extended shape like blades 2, driving H-shaped steel piles 3 into the ground at equal spaces or optional spaces within a range of about 1-3 m to form posts, and then installing the concrete blocks 1 to be fitted into the H-shaped steel piles 3 and piling the concrete blocks 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  [Technical Field] The present invention relates to a concrete block for constructing a retaining wall by using a steel H-shaped pile as a support and fitting in a gap between the piles, and a construction method thereof.

  Traditionally, retaining walls have been constructed to reinforce the boundaries where the ground has a height difference, and the coasts and riverbanks that are the boundaries between land and water. The retaining wall, which is generally constructed in many years, is a steel H-shaped pile that is driven into the ground at equal or arbitrary intervals within a range of about 1 to 3 meters, and then the concrete block is made of steel H It was installed so as to fit in the gaps between the piles and stacked to form a retaining wall. (See Fig. 7 (1))

  Because of this, part of the steel H-shaped pile is exposed to the exterior, so a wooden formwork is installed around the steel H-shaped pile, and concrete is poured (rolled concrete treatment) to prevent rust. It was. (Japanese Patent Laid-Open No. 2007-308876, etc.)

  And in order to implement this process, the surrounding ground had to be excavated.

  In addition, in order to increase the adhesion strength between the steel H-shaped pile and the concrete, the steel H-shaped pile was previously disposed by performing welding or the like on the portion exposed to the exterior.

  On the other hand, when building a retaining wall on the shore or riverside, first of all, a water blocking wall must be set up around the water, and the water cannot be welded, wooden formwork, or concrete pouring work can be performed. .

  As for the form after the retaining wall was completed, the steel H-shaped pile and the concrete block subjected to the rust prevention treatment were uneven. This is because when there are roads and sidewalks next to the retaining wall, this uneven part becomes a dangerous part, and on the coast and riverside, it becomes a resistance part of waves and water currents. I didn't.

  As described above, the construction of the retaining wall requires several steps and time, and the ground must be excavated more than necessary. In addition, the cost increased due to the addition of indirect work in areas such as the coast and riverbanks.

JP 2007-308876 A

  The present invention provides a retaining wall for the purpose of simplifying the retaining wall construction process and shortening the construction period and the construction cost.

In order to solve the problems, the present invention
In claim 1, the steel H-shaped piles are driven into the ground at equal intervals or at arbitrary intervals to form struts, then fitted into the gaps between the struts, and built up and built up,
Retaining wall concrete characterized in that recesses that fit into the left and right projecting pieces of the T-shaped part are provided on both the left and right sides so as to cover one side of the T-shaped part on the front side of the steel H-shaped pile. It is a block made of.

  The steel H-shaped pile is a pile using H-shaped steel (JIS G 3192) having a width dimension of about 20 cm to 40 cm.

  Here, the dimension of the concave part in which a part of the H-shaped steel of the concrete block fits must be a concave dimension that exceeds the standard dimension of the steel H-shaped pile determined according to the situation of the retaining wall construction site. A concave shape in which the width of the concave portion is 50 mm or more and the depth is 60 mm or more is preferable with respect to the T-shaped portion of the steel H-shaped pile to be used.

  For example, in the case of 40 mm × 40 mm H-shaped steel (JIS G 3192), the width of the recessed portion to be fitted is preferably about 60 mm to 120 mm, about 70 mm to 90 mm, and more preferably about 75 mm.

  The depth of the recess is preferably about 200 mm to 300 mm, preferably about 215 mm to 275 mm, and most preferably about 225 mm.

  The height of the block is preferably about 100 mm to 2000 mm, more preferably about 250 mm to 1000 mm, and most preferably about 500 mm.

  The length of the block is preferably the same as or smaller than the pile pitch (about -50 mm), and the pile pitch is most preferably about 1490 mm with respect to 1500 mm.

  The thickness of the block is preferably about 75 mm to 250 mm, more preferably about 100 mm to 200 mm, and most preferably about 150 mm.

  According to a second aspect of the present invention, in the recesses to which the left and right sides of the block are fitted, the rear surface side protruding piece (blade part) forming the concave part is shorter than the front side protruding piece (blade part). It is what.

  The difference in the length direction between the distal end portion of the projecting piece on the back surface side and the distal end portion of the projecting piece on the front surface side is preferably about 20 mm to 80 mm, more preferably about 30 mm to 60 mm, and most preferably about 45 mm. .

  Moreover, in Claim 3, it is set as the concrete block for retaining walls characterized by the recessed part being formed in the front side of the said block.

  The depth of the concave portion on the front side may be such that the thickness of the block can maintain a proof strength that does not break against the pressure as the retaining wall.

  For example, when the total thickness of the block is 370 mm, the depth of the recess is preferably about 75 mm to 250 mm. More preferably, it is 100 mm to 200 mm, and most preferably about 150 mm.

  According to a fourth aspect of the present invention, there is provided a concrete block for a retaining wall, wherein a natural stone-like design approximated to igneous rock, sedimentary rock, or metamorphic rock is formed on the front surface of the block. is there.

  Moreover, in Claim 5, using the block in any one of said Claim 1 to Claim 4, it fits and covers the T-shaped part of the front side of steel H-shaped pile from both sides, and a retaining wall surface is constructed. It is set as the construction method of the retaining wall characterized by doing.

  In this way, the left and right sides of the concrete block are extended like blades, and the conventional retaining wall can cover a portion where the steel H-shaped pile is partially exposed.

The present invention has the following effects.
1) The wooden form installation process required for concrete pouring work for the rust prevention treatment of steel H-shaped piles can be omitted.
2) Since the water-stopping effect occurs when it is fitted into the steel H-shaped pile, the conventional retaining wall should be omitted in the process of installing the water-stopping wall in advance when constructing in the coastal or riverside area. I can.
3) Since there is no wound concrete joint, there is no problem of cracking.
4) There is no wound concrete joint, and the stress can be dispersed with the corners having an R shape.
5) Inserting mortar can be placed for each stage.
6) Since each stage can be completed, a temporary scaffold is not required.

The perspective view which shows the Example of the single-piece | unit of this invention. The perspective view which shows the Example in which the protrusion piece of the back surface side which forms the recessed part of the right-and-left both sides of the block by this invention has a shape shorter than the protrusion piece of the surface side. The perspective view which shows the state which fitted and piled up the block of this invention in the steel H type pile. The perspective view which shows the Example which gave the front surface of the block of this invention to flat shape. The perspective view which shows the Example which gave the design of the natural stone pattern to the front surface of the block of this invention. The flowchart which shows the comparison of the work process of the conventional construction method and the construction method of this invention. The horizontal sectional view which shows the comparison of the construction state of the conventional method and the method of this invention.

  The present invention is a concrete block for retaining walls in which concave portions fitted to the left and right projecting pieces of the T-shaped part are provided on the left and right side parts so as to cover one side of the T-shaped part on the front side of the steel H-shaped pile. The retaining wall is constructed using

  Referring to the drawings, FIG. 1 is a single view of the present invention. The block 1 is provided with a recess 2c formed by protruding pieces 2a and 2b on the left and right side surfaces, and a recess 3 is provided on the front side of the block 1.

  Since the concrete block 1 is extended to the left and right sides of the concrete block 1 in the shape of blades 2a and 2b, the steel H-shaped pile 3 is driven into the ground at equal intervals or at arbitrary intervals within a range of about 1 to 3 meters. As a support, it is possible to form a retaining wall by fitting and stacking in the gap.

  FIG. 2 is a perspective view of a block characterized in that the rear surface side protruding piece forming the concave portions on the left and right side surfaces of the block according to the present invention has a shorter shape than the surface side protruding piece. As shown in FIG. 7 (2), the concave portion into which the H-shaped steel fits is formed with a gap portion between the front surface of the H-shaped steel and the surface-side protruding piece of the block, and this gap portion becomes a filling portion of the filling mortar. In this embodiment, the top portion is an obtuse triangular filling portion.

  In FIG. 3, a plurality of blocks of the present invention are used and stacked to constitute a retaining wall. The shape of the blade 2 covers the front surface of the steel H-shaped pile 3, and the mortar injection gap 4 can prevent rust prevention of the steel H-shaped pile 3. Therefore, the installation process of a wooden formwork becomes unnecessary, and the excavation of the surrounding ground is also unnecessary for the implementation.

  Due to the shape and weight of the present invention, it becomes a water stop wall at the same time as fitting and stacking, so that it is not necessary to install a water stop wall for indirect work in areas such as the coast and riverbank. In addition, a sealing material may be attached around the side surface of the present invention to further enhance the watertightness when the present invention is installed.

  As shown in FIG. 4, the front surface of the concrete block 4 according to the first embodiment can be formed into a flat shape 11 to construct a retaining wall having a smooth external surface.

  As shown in FIG. 5, the design of the natural stone pattern 12 was given to the front surface of the concrete block 1 of Example 1 to harmonize with the landscape and the surrounding environment. In addition to natural stone patterns, log patterns, geometric patterns, and character patterns may be used.

  Moreover, what provided the drain hole which penetrates in the thickness direction of a block may be used.

  FIG. 6 shows a perspective view of a block in which the rear surface side protruding piece forming the concave portions on the left and right side surfaces according to the present invention has a shape shorter than the surface side protruding piece. In the concave portion in which the H-shaped steel fits, the concrete pouring gap becomes an inclined surface, and forms a filling portion of the filling mortar.

  FIG. 6 is a flowchart showing a comparison of the work process of the conventional method in the retaining wall method and the method according to the present invention.

  The conventional construction method requires impermeable wall construction, temporary scaffolding construction, formwork production, demolding, formwork material disposal, design work, etc., and the present invention can save labor for these works.

  FIG. 7 is a horizontal sectional view showing a comparison between the conventional construction method in the retaining wall construction method and the construction state of the construction method according to the present invention. The joint portion on the front surface of the block is filled with a water stop material.

In the conventional construction method, there is a problem that stress is concentrated and cracks are generated at the joint portion of the wound concrete. In the case of the present invention, there is no joint portion, and the corner portion has an R shape, and stress is dispersed, so there is no risk of cracking.

It can also be applied to park and road greening fence blocks and block fences on land and residential boundaries.

DESCRIPTION OF SYMBOLS 1, 4 Concrete blocks 2a, 2b, 2c, 5a, 5b, 5c Blade 3, 6 Front recessed part 7 Steel H-shaped pile 8 Mortar injection gap 9 Flat shape 10 Natural stone pattern 11 Flat surface 12 Natural stone pattern surface

Claims (5)

In the concrete block for retaining walls constructed by stacking steel H-shaped piles into the ground at equal intervals or arbitrary intervals to make struts, fitting them in the gaps between the struts,
A concrete block for retaining walls, characterized in that the left and right sides are provided with recesses that fit the left and right protruding pieces of the T-shaped part so as to cover the T-shaped part on the front side of the steel H-shaped pile. .   The recessed part (blade part) of the back surface side which forms this recessed part is shorter than the protruding piece (blade part) of the surface side in the recessed part which the right and left both sides of the said block fit. Concrete block for retaining wall.   3. A concrete block for retaining walls according to claim 1 or 2, wherein a concave portion is formed on the front side of the block.   The structure according to any one of claims 1 to 3, wherein a natural stone-like design approximated to igneous rock, sedimentary rock, or metamorphic rock is formed on the front surface of the block. Concrete block for walls.   Using the block according to any one of claims 1 to 4, the T-shaped portion on the front side of the steel H-shaped pile is fitted and covered from both sides, and stacked to construct a retaining wall. Retaining wall construction method.