JP2008274601A - Concrete molded body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concrete molded body which facilitates horizontal and vertical minute adjustment of an L-shaped retaining wall or a box culvert only by rotating male screws to adjust the height of the same protruding from a bottom surface of a bottom plate, to thereby drastically improve the workability thereof. <P>SOLUTION: According to the structure of the concrete molded body, a plurality of female screws 9A, 9C are embedded in the bottom plate 2 set on foundation concrete 4 serving as a mounting surface of the L-shaped retaining wall 1, so as to vertically penetrate the bottom plate 2, at locations longitudinally and laterally separated from each other, and the male screws 11 are screwed into the female screws 9A, 9C, followed by rotating the male screws 11 to adjust the length of the male screws 11 protruding from the bottom surface of the bottom plate 2. In this manner, vertical and horizontal inclinations of the L-shaped retaining wall 1 can be adjusted. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a concrete molded article that facilitates installation work such as an L-shaped retaining wall used as a retaining wall for a boundary of a residential land or a road slope, and a box culvert serving as a water channel.

In general, an L-shaped retaining wall 1 as shown in FIG. 7 is used as a soil retaining for a boundary of a residential land or a slope of a road. This is the bottom plate 2 and the retaining wall 3 formed integrally with concrete in an L shape. In order to adjust the top end of the foundation concrete 4 formed at the place where the earth is held as shown in FIG. The adjusting mortar 5 finished by air kneading is spread while confirming the condition of the top end, and the L-shaped retaining wall 1 is lifted and installed thereon with a crane. However, depending on the sinking amount of the adjusting mortar 5, it is difficult to match the joint surface with the adjacent L-shaped retaining wall 1, and the work of lifting and correcting with a crane is repeated many times. A bar was inserted from the edge of 2 to adjust. For this reason, the installation work takes time, and in particular, when fine adjustment is performed, there is a problem that workability becomes worse as the product becomes larger and heavier.

For this reason, as shown in FIG. 9, an L-shaped retaining wall 1 in which a plurality of burl insertion holes 7 are formed in advance on the lower peripheral side of the bottom plate 2 has been developed (Patent Document 1). However, the work of inserting and lifting the bar into the bar insertion hole 7 is heavy labor, and fine adjustment is difficult. In a narrow place, there is a problem that the space for inserting and lifting the bar cannot be secured and the work is difficult.

In order to compensate for the amount of adjustment mortar 5 sinking, a hardened plastic spacer laid under the bottom plate 2 is available on the market. It had to be lifted up and the sequence of work did not change.
JP 2000-45303 A

The present invention improves on the conventional method of using a bar, and the horizontal and vertical fine adjustments and adjustments of L-type retaining walls and box culverts can be achieved simply by rotating the external thread and adjusting the height protruding from the bottom surface of the bottom plate. It is an object of the present invention to provide a concrete molded article that can easily improve the workability by easily adjusting the amount of mortar sinking.

The concrete molded product according to claim 1 of the present invention has a plurality of plates vertically penetrating the bottom plate installed on the foundation concrete serving as the mounting surface of the L-shaped retaining wall or box culvert with vertical and horizontal intervals. A female screw is embedded, a male screw is screwed into the female screw, the male screw is rotated to adjust the length of the male screw protruding from the bottom surface of the bottom plate, and the horizontal and vertical of the L-shaped retaining wall or box culvert This is characterized in that the adjustment is made.

The concrete molded product according to claim 2 of the present invention is characterized in that, in claim 1, the female screw into which the male screw is screwed is embedded in at least three triangular positions of the bottom plate. is there.

A concrete molded article according to claim 3 of the present invention is the concrete molded article according to claim 1 or 2, wherein a seat plate is joined to the lower part of the male screw, and a recess in which the seat plate is housed so as to be extendable is embedded in the bottom plate. It is formed on the bottom surface of the lower part of the female screw.

According to the concrete molded article of the first aspect of the present invention, a plurality of female screws penetrating vertically at intervals in the vertical and horizontal directions are embedded in the bottom plate of the L-shaped retaining wall or box culvert, Just adjust the height protruding from the bottom surface of the bottom plate by screwing the male screw into the female screw, rotate the male screw, adjust the sinking amount of the adjustment mortar by the weight of the L-shaped retaining wall and box culvert, Horizontal and vertical fine adjustment can be easily performed, and workability can be greatly improved and construction costs can be reduced as compared with conventional methods using a bar or a hard plastic spacer.

According to the concrete molded product of claim 2, if the embedded position of the female screw screwed with the male screw is embedded in at least three positions of the apex of the triangle, the horizontal shape of the L-type retaining wall and the box culvert And the vertical tilt can be adjusted.

According to the concrete molded product of claim 3, since the seat plate is joined to the lower part of the male screw, when this is rotated and protruded from the bottom surface of the bottom plate, the contact area with the foundation concrete is wide. The L-type retaining wall and the box culvert can be stably supported.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. The L-type retaining wall 1 is formed by integrally molding a bottom plate 2 and a retaining wall 3 into a L-shaped piece of concrete, and two female screws 9A and 9B are vertically moved on the bottom plate 2 along the retaining wall 3 side. It is buried so as to penetrate through. Further, three female screws 9C, 9D, and 9E are embedded so as to vertically penetrate along the side edge of the bottom plate 2 opposite to the retaining wall side. Further, as shown in FIG. 2, male screws 11 each having a hexagonal groove 10 formed thereon are screwed into the female screws 9A to 9E.

When earth retaining is performed with the L-shaped retaining wall 1 having the above-described configuration, as shown in FIG. 3, the ground crushed stone 12 is pre-rolled on the construction site and the foundation concrete 4 serving as a placement surface is placed thereon. . After a sufficient curing period, the adjustment mortar 5 is spread on the top, and then the L-type retaining wall 1 is lifted and placed with a crane.

In this state, the male screw 11 screwed into the female screws 9A to 9E while observing the gap or inclination between the retaining wall 3 of the installed L-shaped retaining wall 1 and the retaining wall 3 of the adjacent L-shaped retaining wall 1 When the hexagon wrench 15 is inserted into the hexagonal groove 10 and rotated, the tip of the male screw 11 protrudes from the bottom surface of the bottom plate 2 and the L-shaped retaining wall 1 tilts. First, the protruding length of the male screw 11 screwed to the female screws 9A and 9B on the left and right is adjusted, and the gap between the adjacent L-shaped retaining walls 1 and the height of the top end are adjusted to make the level horizontal. Thereafter, the protruding length of the male screw 11 screwed into the female screws 9C to 9E is adjusted to adjust the inclination of the retaining wall 3 to bring out the vertical.

In this way, by rotating the plurality of male screws 11 to adjust the protruding length from the bottom surface, the horizontal and vertical directions are obtained, and the gaps and steps between the adjacent retaining walls 3 and 3 are eliminated. 3, 3 can be installed in a planar shape.

Thereafter, the adjacent L-shaped retaining walls 1 and 1 that are normally used are connected by a connecting metal fitting (not shown), and then the adjustment mortar 5 and the mortar 6 containing moisture are packed in the gap around the bottom plate 2 and the female screw 9A. The mortar 6 is filled in the holes of ~ 9E to complete.

Therefore, by rotating the male screw 11 screwed into the female screws 9A to 9E attached to the bottom plate 2 and adjusting the height at which the lower end protrudes from the bottom surface of the bottom plate 2, the horizontal shape of the L-shaped retaining wall 1 can be increased. The vertical fine adjustment can be easily performed, and the workability can be greatly improved as compared with the conventional method using a bar. In addition, if the position of the female screw is embedded in at least three triangular vertex positions of the screws 9A, 9B, and 9D, the horizontal and vertical inclinations can be adjusted.

FIG. 4 shows another embodiment of the present invention, in which two female screws 9A and 9B are embedded at intervals on the retaining wall side of the bottom plate 2 of the L-shaped retaining wall 1 so that the retaining wall of the bottom plate 2 is retained. One female screw 9C is embedded in the middle of the side edge opposite to the side, and the male screw 11 is screwed to each of them to be provided at three positions at the apex of the triangle.

FIG. 5 shows another embodiment of the present invention, in which a circular seat plate 16 is joined to the lower portion of the male screw 11. A recess 17 is formed in the bottom surface of the lower part of the female screw 9 embedded in the bottom plate 2 so that the seat plate 16 can be extended.

In the above configuration, since the circular seat plate 16 is joined to the lower portion of the male screw 11, the contact surface with the foundation concrete 4 is wide and stable when rotated and protruded from the bottom surface of the bottom plate 2. L-shaped retaining walls and box culverts can be supported.

FIG. 6 shows another embodiment of the present invention. In the bottom plate 2 of the box culvert 18, a plurality of female screws 9 penetrating vertically are provided at intervals in the vertical and horizontal directions. 9, male threads 11 having hexagonal grooves 10 formed in the upper part are respectively screwed together. The box culvert 18 of this structure is also adjusted by inserting the hexagon wrench 15 into the hexagonal groove 10 and rotating it so that the lower end of the male screw 11 protrudes from the bottom surface of the bottom plate 2 to adjust the horizontal and vertical of the box culvert 18. Thus, it is possible to easily form a continuous water channel without a gap or a step between adjacent box culverts 18.

It is a perspective view of the L type retaining wall by one embodiment of the present invention. It is sectional drawing of the L-shaped retaining wall shown in FIG. It is sectional drawing which shows the state which is adjusting the inclination of the L-shaped retaining wall shown in FIG. It is a perspective view of the L-shaped retaining wall by other embodiment of this invention. It is sectional drawing which shows the screwing state of the internal thread by other embodiment from which this invention differs, and the external thread which attached the seat plate. It is a perspective view which shows the box culvert by other embodiment from which this invention differs. It is a perspective view which shows the state which has installed the conventional L-shaped retaining wall. It is a perspective view which shows the state which has installed the some L-shaped retaining wall side by side. It is a perspective view which shows the L-shaped retaining wall in which the conventional burl insertion hole was formed.

Explanation of symbols

1 L-type retaining wall
2 Bottom plate
3 Retaining walls
4 foundation concrete
5 Adjusting mortar
6 Mortar
7 bar insertion hole
9, 9A-9E Female thread
10 Hexagon groove
11 Male thread
12 Basic crushed stone
15 Hex wrench
16 Seat plate
17 recess
18 Box culvert

Claims (3)

  The bottom plate installed on the foundation concrete that will be the mounting surface of the L-type retaining wall or box culvert is embedded with a plurality of female screws that penetrate vertically in the vertical and horizontal directions, and male screws are inserted into these female screws. Concrete molding characterized by adjusting the horizontal and vertical of the L-shaped retaining wall or box culvert by adjusting the length of the male screw protruding from the bottom surface of the bottom plate by screwing and adjusting the male screw Goods.   2. The concrete molded article according to claim 1, wherein the female screw into which the male screw is screwed is embedded in at least three triangular positions of the bottom plate. 3. A seat plate is joined to a lower portion of the male screw, and a recess in which the seat plate is retractably accommodated is formed on the bottom surface of the lower portion of the female screw embedded in the bottom plate. Concrete moldings.