JPH0440496B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a construction method for a top-shaped block in which a conical or pyramidal body is provided at the lower part of a flat upper board, and a cylindrical shaft leg is provided at the center of the lower part of the body. It is related to.

(Prior art) A top-shaped block balances the weight of the block itself, the vertical load it receives, and the total force of the ground reaction force and frictional resistance generated in the body and pivot legs, so that the block can be leveled without uneven settlement. It exerts the bearing capacity of the soil, and is used as a basic component in various ground stabilization and foundation reinforcement construction methods.

(Problem to be solved by the invention) The top-shaped block uses the vertical component of the ground reaction force on the conical or pyramidal body surface to be used as buoyant force to prevent sinking, so it cannot move in the vertical direction, that is, sink. Although it has strong resistance to movement, the problem is preventing movement in the horizontal direction.

That is, between the top-shaped blocks other than the outermost one, the horizontal components of the ground reaction force cancel each other out, but for the outermost one For columns, there is nothing that opposes this horizontal force.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a construction method in which horizontal movement of a group of block blocks is inhibited by providing a vertical wall as a means to counteract this horizontal component force.

(Means for Solving the Problems) As explained below using reference numerals in the attached drawings, in the installation method of the present invention, a conical or pyramidal body 4b is provided at the lower part of the flat upper plate 4a, and the body 4b Top-shaped blocks 4 with a cylindrical shaft leg 4c provided at the center of the bottom of the block are arranged in multiple rows vertically and horizontally with the sides of the flat upper board 4a in contact with each other, and the ground around the outside of the top-shaped block groups 4, 4... A vertical wall 6 is provided therein to a depth corresponding to at least the entire length of the top-shaped block 4, and a flat upper plate 4 of the top-shaped block 4 arranged at the outermost side is provided.
The side surface of c is brought into contact with the vertical wall 6 directly or through a rigid body, and the vertical wall 6 supports the horizontal component of the ground reaction force that the arranged top-shaped block 4 applies to the outer ground part. .

(Function) Prior to laying the top-shaped blocks, the vertical walls 6,
6 is constructed on the ground 7, and each top-shaped block 4 is arranged in a plurality of rows and columns with the sides of the flat upper board 4a abutting each other between the vertical walls 6, 6. The side surface of the flat upper plate 4a of the outermost top-shaped block 4 is brought into contact with the vertical wall 6 either directly or through a rigid body.

Thereafter, earth and sand are backfilled, and underground structures and above-ground structures are constructed on top of the top block groups 4, 4, . . . .

In a group of top-shaped blocks laid out in this way,
The vertical wall 6 counteracts the horizontal component of the ground reaction force exerted by the outermost block 4 on the outer ground part, while the outermost block 4 acts on the inner ground part. The horizontal component of the ground reaction force applied to the ground part is canceled out by the horizontal component of the ground reaction force applied to the ground part by the top-shaped block 4 placed inside, and the top-shaped block placed inside cancels out the horizontal component of the ground reaction force applied to the ground part. The horizontal component of the ground reaction force applied to the ground part on the other side is canceled out by the horizontal component of the ground reaction force applied to the ground part by the top-shaped blocks placed further inside, and in the same manner, the top-shaped block group Top-shaped blocks 4, 4 placed inside the
Since the horizontal components of the ground reaction force are canceled out between each other, the horizontal movement of each top-shaped block 4, which is the horizontal component of the ground reaction force, is neutral.

(Example) In the illustrated embodiment, the top-shaped blocks 4, 4, etc. in multiple rows and columns are fixed to each other in both the vertical and horizontal rows at the upper and lower parts, and the pivot leg 4c of each top-shaped block 4 is always kept vertically. The upper connecting member 5
and the lower connecting member 3 are used.

The lower connecting member 3 has a plurality of support rods 2 arranged vertically and horizontally at the same intervals, and a ring 1 is fixed to the intersection of the horizontal support rod 2 and the vertical support rod 2, and each ring 1 has a pivot leg 4c of a top-shaped block.
is inserted vertically.

The upper connecting member 5 includes a vertical support member 5a that passes through a hanging tool 4d that protrudes from the upper part of the flat upper board 4a.
and a horizontal support member 5b that abuts the upper surface of the hanging tool 4d. The vertical support member 5a and the horizontal support member 5b intersect at a hanger 4d, and are fixed to the hanger 4d by suitable means such as wire binding or welding.

The vertical wall 6 can be constructed by driving plate-shaped members such as metal sheet piles or concrete sheet piles, or pile members, etc. into the ground 7, but it is also possible to construct a reinforced concrete wall by pouring concrete material into an excavated trench. It can also be composed of

(Effects of the Invention) As described above, in the installation method of the present invention, the top-shaped blocks 4, 4, etc., which are arranged in multiple rows and columns with the sides of the flat upper board 4a in contact with each other, are placed in the ground around the outside. It is surrounded by a vertical wall 6 provided to a depth corresponding to at least the entire length of the top-shaped block 4, and the side surface of the flat upper plate 4a of the outermost top-shaped block 4 is in contact with the vertical wall 6 directly or through a rigid body. Since they are in contact with each other, the horizontal component of the ground reaction force applied to the outer ground by the outermost block 4 is
Since the horizontal component of the ground reaction force opposed by the vertical wall 6 and given by each top-shaped block 4 is neutral with respect to the horizontal movement of the top-shaped block 4, the outermost top-shaped block Each of the top-shaped blocks 4 including the top-shaped blocks 4 do not move in the horizontal direction and are properly maintained in their initial upright state, allowing the original excellent characteristics of the top-shaped blocks to be maximized.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an example of a top-shaped block used in the present invention. FIG. 2 is a longitudinal sectional view of the top-shaped block in an installed state according to an embodiment of the present invention, and FIG. 3 is a perspective view showing the lower connecting member 3 separated. DESCRIPTION OF SYMBOLS 1...Ring, 2...Support rod, 3...Lower connecting member, 4...Block, 4a...Flat upper plate, 4b
...Conical body, 4c...Cylindrical pivot leg, 4d...
Hanging tool, 5... Upper connecting member, 5a... Vertical support member, 5b... Horizontal support member, 6... Vertical wall, 7... Ground.

Claims (1)

[Claims] 1 Conical or pyramidal body 4 at the bottom of the flat upper plate 4a
b, and a cylindrical shaft leg 4 is provided at the center of the lower part of the body 4b.
The top-shaped blocks 4 provided with the top-shaped blocks 4 are arranged in multiple rows vertically and horizontally with the side surfaces of the flat upper board 4a in contact with each other, and at least vertical walls 6 are installed in the ground around the outside of the top-shaped block groups 4, 4... The top block 4 is provided to a depth corresponding to the entire length of the top block 4, and the side surface of the flat upper plate 4a of the top block 4 placed at the outermost side is brought into contact with the vertical wall 6 directly or through a rigid body. This method of laying a block block is characterized in that the vertical wall 6 supports the horizontal component of the ground reaction force exerted by the block block 4 on the outside of the ground.