JP2657789B2 - Foundation structure of retaining wall block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation structure for stacking retaining walls produced in a factory.

[0002]

2. Description of the Related Art In a conventional joint structure of a retaining wall block, as disclosed in Japanese Utility Model Application No. 2-125475, a connecting steel material is inserted into each vertical hole of upper and lower retaining wall blocks and inserted into the center. The positioning plate fitted to the connecting steel material at the hole is fitted into the upper end enlarged portion of the vertical hole of the upper retaining wall block, and the coupler screwed to the upper screw portion of the steel material is brought into contact with the upper surface of the positioning plate. The upper and lower retaining wall blocks are tightened and connected, grout is injected into each of the upper and lower vertical holes to fix the connecting steel material to the upper and lower retaining wall blocks, and the lower end screw portion of the next-stage connecting steel material is connected to the coupler. After screwing, the coupler is housed in a manner similar to the enlarged lower end of the vertical hole of the next retaining wall block.

In such a joint structure, if the lowermost connecting steel material buried in the reinforced concrete base structure is not set at an appropriate position, it is inserted into the vertical hole of the lowermost retaining wall block. Either the upper end screw portion of the connecting steel material cannot be inserted and the coupler cannot be screwed in, or if it is forcibly inserted, the retaining wall block cannot be stacked at an appropriate position.

[0004] Such misalignment of the connecting steel material may be caused by insufficient fixing and supporting of the connecting steel material to the casting form or the reinforcing bar assembly of the foundation structure, or during the casting of the foundation concrete or Occurs during compaction.

When the position of the connecting steel material is found to be out of order at the stage after the hardening of the base concrete, the connecting steel material is bent by a required angle by hitting or pushing and pulling, and it is necessary to correct the projecting direction of the upper screw portion. However, such a repair work is not only complicated, but also may damage the upper end screw portion and hinder the screwing of the coupler. Further, when the deviation is large, it is necessary to destroy the base concrete of the relevant portion and to correct the position of the connecting steel material from a deep position, which has caused a considerable delay in the construction period.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to fix the connecting steel material at an appropriate position, so that complicated bending correction of the upper end screw portion is not required at all, and the screwing trouble of the coupler is not required. An object of the present invention is to provide a foundation structure of a retaining wall block that can efficiently perform a joining operation of a connecting steel member and a coupling steel member and a stacking operation of a retaining wall block without fear of occurrence.

Still another object of the present invention is to provide a retaining wall for visually confirming whether or not the lower end thread portion of the connecting steel is properly screwed when the base plate and the connecting steel are joined. The purpose is to provide the basic structure of the block.

[0008]

The basic structure of a retaining wall block according to the present invention will now be described with reference to the accompanying drawings. In the basic structure of the retaining wall block, a basic plate 1 made of a rectangular plate and two legs are provided. 2 and a pair of fixing support portions 4 and 4 composed of one mounting plate portion 3 connected to the lower ends of the leg portions 2 and 2 are attached to the long side surfaces of the base plate 1 by the leg portions 2. There is a substructure 5 integrally formed by connecting its upper ends.

The lower surface of the mounting plate 3 is leveled and brought into contact with the upper surface 6a of the concrete 6, the anchor bolt 8 is inserted into the through hole 7 of the mounting plate 3, and the lower portion of the anchor bolt 8 is leveled. The concrete structure 6 is driven into an anchor hole 9 which is drilled and fixed, and a nut 10 is screwed onto an upper portion of the anchor bolt 8 to level the base structure 5 and tightened and fixed to the concrete 6.

The upper portions of a plurality of connecting steel members 13 having lower end screw portions 12 screwed into and fixed to the vertical screw holes 11 of the base plate 1 are projected above the reinforcing bar assembly 14, and the upper portions of the respective connecting steel members 13 are formed. , A width fixing plate 15 is fitted in the through hole 16, and a coupling coupler 19 for connecting with the upper connecting steel material 18 on the upper end screw portion 17 of the connecting steel material 13 is screwed into the base structure 5. A base concrete 20 is cast so as to embed the main part of the reinforcing steel assembly 14 and the connecting steel 13, and the upper part of the coupler 19 is placed on the upper surface 20 a of the base concrete 20.
Project from

[0011]

The foundation structure of this retaining wall block is as follows: the ground is excavated to a predetermined depth, crushed stones 19 are laid on the bottom surface, leveling concrete 6 is cast thereon, and leveling concrete 6 is laid. Is finished horizontally, and a positioning line is drawn on the upper surface 6a.
The lower end thread portions 12 of a plurality of connecting steel members 13 are screwed and fixed to the vertical screw holes 11 of the base plate 1, and each connecting steel member 13 is disposed at right angles to the base plate. At this time, since the base plate 1 is a plate material, it is possible to visually check whether the screwing state of the lower end screw portion 12 is appropriate, and it is possible to prevent the connecting steel material 13 from being pulled out.

The base plate 1 is aligned with the positioning line.
Is installed, and a drill is inserted through the through hole 7 of the mounting plate portion 3 to form an anchor hole 9. Through hole 7 and anchor hole 9
Then, the lower part of the anchor bolt 8 is inserted, the anchor bolt 8 is leveled, and the concrete 6 is driven and fixed. Preferably, the gap between the anchor holes 9 and the anchor bolts 8 is filled with a suitable grout material.

The level of the base plate 1 is measured by a leveler. When the base plate 1 is not arranged horizontally, the level is adjusted between the mounting plate 3 and the leveling concrete 6. Insert the liner. After securing the base plate 1 in a horizontal state in this way, a nut 10 is screwed onto the upper portion of the anchor bolt 8, and the base plate 1 is leveled and fastened and fixed to the concrete 6.

The required number of vertical reinforcing bars and horizontal reinforcing bars are assembled, the upper portion of the connecting steel material is projected from the reinforcing bar assembly 14, and the upper portions of the connecting steel materials 13 are fitted into the through holes 17 of the width stop plate 16 and connected. Relative movement of the steel materials 13 for use. A coupler 19 is screwed into the upper end screw portion 17 of each connecting steel member 13, and the upper opening of the coupler 19 is closed and protected with a gum tape or the like. The displacement of the connecting steel material 13 at the time of placing the foundation concrete 20 is prevented by the width stop plate 16.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, four connecting steel members 13 are used for one base plate 1, and each connecting steel member 13 is set to have the same length. The vertical screw hole 11 of the base plate 1 is formed by a nut welded to the lower surface of the base plate 1. Further, by inserting the spiral streaks 21 into the connecting steel members 13 and driving the foundation concrete 20, the concrete inside the spiral streaks 21 is restrained so that the foundation structure 5 and the connecting steel members 13 are connected. The adhesion strength with the base concrete 20 can be increased.

The coupler 19 is screwed with a lower end screw portion 24 of the connecting steel material 18 inserted into the connecting vertical hole 23 of the lowermost retaining wall block 22. A grout material 25 is injected into the joining vertical hole 23, whereby the connecting steel material 18 is fixed to the retaining wall block 22. The grout material 25 is also filled in the end recess 26 of the retaining wall block 22, whereby the face 19 is fixed to the retaining wall block. The upper end screw portion 27 of the connecting steel material 18 has a next-stage coupler 28.
Is screwed. Hereinafter, by repeating these steps sequentially, a retaining wall having a required height is built on the upper part of the foundation concrete.

[0017]

As described above, in the foundation structure of the retaining wall block according to the present invention, the foundation structure 5 is stably and horizontally leveled and fixed to the concrete 6, and each linking steel member 9 is provided with a width stop plate. The steel material for connection 1
No complicated bending correction work 3 is required, and there is no screwing problem of the coupler 19, and the work of joining the connecting steel 13 and the connecting steel 18 and the work of stacking the retaining wall blocks 22 can be efficiently performed. .

Furthermore, since the base plate 1 is a plate material, when the base plate 1 and the connecting steel member 13 are joined, it is determined whether the lower end thread portion 12 of the connecting steel member 13 is properly screwed. It can be visually confirmed, and joint failure such as pull-out due to insufficient screwing can be eliminated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a retaining wall using a basic structure of a trimming block according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of an essential part of a foundation structure of the retaining wall block.

FIG. 3 is an exploded perspective view of a basic structure of the basic structure of the retaining wall block.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base plate 2 Leg part 3 Mounting plate part 4 Anchoring support part 5 Foundation structure 6 Leveling concrete 6a Upper surface 7 Through hole 8 Anchor bolt 9 Anchor hole 10 Nut 11 Vertical screw hole 12 Lower screw part 13 Steel material for connection 14 Rebar set Solid 15 Width stop plate 16 Through hole 17 Upper screw part 18 Steel material for connection 19 Coupler 20 Foundation concrete 20a Upper surface 21 Spiral streak 22 Retaining wall block 23 Vertical hole for joining 24 Lower screw part 25 Grout material 26 End recess 27 Upper screw part 28 Coupler

Claims (1)

(57) [Claims] 1. A base plate 1 made of a rectangular plate,
A pair of fixing supports 4 and 4 composed of two legs 2 and 2 and one mounting plate 3 connected to the lower ends of the legs 2 and 2 are connected to the long side surface of the base plate 1. There is a substructure 5 integrally formed by connecting the upper ends of the legs 2 and 2 to each other. The lower surface of the mounting plate 3 is leveled and brought into contact with the upper surface 6a of the concrete 6, and the through hole of the mounting plate 3 is formed. 7, an anchor bolt 8 is inserted, the lower part of the anchor bolt 8 is leveled, and it is driven into an anchor hole 9 drilled in the concrete 6 and fixed. A nut 10 is screwed on the upper part of the anchor bolt 8. And leveling the substructure 5 and concrete 6
A plurality of connecting steel materials 1 which are screwed and fixed to the vertical screw holes 11 of the base plate 1 and screwed and fixed thereto.
3 is projected above the reinforcing bar assembly 14, and a width stop plate 15 is fitted to the upper part of each connecting steel member 13 through a through hole 16, and the upper end screw portion 17 of the connecting steel member 13 is located on the upper side. Screwing the joining coupler 19 with the connecting steel material 18 of
A base concrete 20 is cast so as to embed the main parts of the base structure 5, the reinforcing bar assembly 14, and the steel material 13 for connection,
The upper part of the coupler 19 is placed on the upper surface 2 of the base concrete 20.
A basic structure of a retaining wall block protruding from 0a.