JPH0762356B2 - Construction method for large concrete blocks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is applicable to large-sized retaining wall blocks, drainage gutter blocks, shelf drainage gutter blocks, box culverts, etc. used for making retaining walls, drainage gutters, drainage tunnels, etc. Related to the construction method of the concrete block.

[Conventional technology]

When constructing retaining walls, drainage trenches, drainage tunnels, etc. by arranging large blocks of this type in sequence one after another, transport the blocks to the site with a transportation vehicle (truck), lift them with a truck lane, etc. It will be placed on the basic concrete) and arranged in order at predetermined positions.

In this case, the front and rear ends of adjacent blocks must be flush with each other, and the vertical height must also be adjusted.

However, since the top of the base is not always horizontal, it is not easy to match the front and rear ends flush with each other or to match the heights of the top and bottom.

Conventionally, after positioning the block on the base, several workers (5 to 6 people) intervene an interposition between the block and the base to move the block to perform positioning work. It's big and heavy, so it's hard
The work was slow because the scaffolding was bad, and it was also dangerous work.

In particular, in the case of a retaining wall block, it is more difficult to make the retaining wall plate flush in order to make the retaining wall look good, and in the case of drainage gutter blocks and box culverts, a drainage gradient is provided in the parallel installation direction. It had to be installed side by side, which was a very troublesome task.

In addition, large concrete blocks are subject to extremely high earth pressure in the front-back direction.

Particularly in the case of a large retaining wall, it is equivalent to the retaining wall being destroyed by sliding in the front-back direction against the earth pressure in the front-rear direction, so firm construction is required.

[Problems to be Solved by the Invention]

The present invention solves the above-mentioned drawbacks, and it is possible for only a few workers to easily and safely move the block efficiently at a predetermined position and at a predetermined height so that the walls of adjacent comrades are flush with each other. The technical issue is to form retaining walls, drainage channels, drainage tunnels, etc. by arranging them in a state that they cannot slide.

[Means for Solving the Problems]

 The gist of the present invention will be described with reference to the accompanying drawings.

The bottom plate 1 of the large-sized concrete block a is provided with an adjusting protrusion 2 for setting the large-sized concrete block a in a correct state and a through hole 3 for pouring a hardening filler, and the adjusting protrusion 2 is adjusted so that the large-sized concrete block a is used as a basic concrete. When the large-sized concrete block a is installed and fixed on the basic concrete b by pouring the hardening filler through the through hole 3 after installing it in the correct position on the b, the left-right direction on the lower surface of the bottom plate 1 of the large-sized concrete block a. The engaging groove 6 is provided on the base concrete b, the engaging portion 6 for engaging with the hardened layer 5 of the hardening filler is provided on the basic concrete b, the upper surface of the hardened layer 5 is the engaging groove 4, and the lower surface is the engaging portion. Construction of a large-sized concrete block, characterized in that the large-sized concrete block a is fixedly installed on the basic concrete b so as not to move back and forth by engaging with 6 It relates to.

[Work]

The large concrete block a is lowered onto the basic concrete b by a crane or the like.

The large-sized concrete block a is placed in a state of being slightly lifted by the adjusting protrusion 2, and the large-sized concrete block a is installed in a proper position at a predetermined position by adjusting the adjusting protrusion 2.

Next, large concrete block a and foundation concrete b
A hardening filler, such as cement milk or epoxy mortar, flows in through the through hole 3 and is hardened so that the upper and lower surfaces of the hardened layer 5 are engaged with the engaging groove 4 of the bottom plate 1 of the large concrete block a and the basic concrete b. The large-sized concrete block a is fixed onto the basic concrete b so as not to be able to slide forward and backward by engaging with the engaging portion 6 of.

〔Example〕

 The illustrated first embodiment will be described.

Providing fulcrum protrusions 2G at the approximate center of gravity of the large block a in a protruding state from the lower surface of the bottom plate 1, and adjusting nut cylinders 7 at two places on the left and right front sides of the bottom plate 1 and one on the rear edge of the middle part, a total of three places. A large-scale concrete embedded in the up-down direction, in which an adjusting bolt 2B is screwed into the adjusting nut cylinder 7 so that the lower end thereof projects from the lower surface of the bottom plate 1 by a desired length, and through holes 3 are provided in one or several places of the bottom plate 1. The block a is placed on the basic concrete b on which the liner plate 8 is laid at the position of the adjusting bolt 2B, and the bottom plate 1 is omitted by using a base material such as a roller material, a wedge material, or a support material as necessary. Maintaining the horizontal state, slide the adjusting bolt 2B on the liner plate 8 with a pushing tool such as a bar to correct the large concrete block a to a predetermined position, and rotate the adjusting bolt 2B to move the wall surface of the large concrete block a. Slope Adjust the left and right inclinations as desired, and if necessary, use suitable means to paste the periphery of the gap between the bottom plate 1 of the large-sized concrete block a and the basic concrete b, and then inject the hardening filler through the through holes 3 to cure it. The upper and lower surfaces of the hardened layer 5 are engaged with the engaging groove 4 of the bottom plate 1 of the large-sized concrete block a and the engaging portion 6 on the basic concrete b so that the large-sized concrete block a cannot be moved back and forth on the basic concrete b. It is characterized by being fixed.

Next, the construction work will be described. The liner plate 8 is laid at a predetermined position on the basic concrete b.

The large concrete block a is lowered onto the basic concrete b by a crane or the like.

The large block body a is placed in a slightly raised state by the fulcrum protrusion 2G. Screw the adjusting bolt 2B to support the large concrete block a.

When the parallel walls are properly flushed like a retaining wall, the fulcrum protrusion 2G and the adjusting bolt 2B are slightly slid on the liner plate 8 using a pushing tool to correct the large concrete block a to a predetermined position. .

In this correct installation state, further adjust the screwing of the adjustment bolt 2B to correctly adjust the front-rear inclination and the left-right inclination.

Next, large concrete block a and foundation concrete b
After pasting the gaps between them, a hardening filler such as cement milk or epoxy mortar flows in through the through holes 3 and is hardened to form the upper and lower surfaces of the hardened layer 5 into the engaging groove 4 of the bottom plate 1 of the large-sized concrete block a. Engagement part 6 on foundation concrete b
, And the large-sized concrete block a is fixed on the basic concrete b so as not to move forward and backward.

Example 2 will be described.

A center of gravity hole 9 is bored at a substantially center of gravity of the large-sized concrete block a, a jack receiving pin 10 is inserted into the center of gravity hole 9, and a power jack 11 is placed on the upper part of the jack receiving pin 10.
A large concrete block a on top of the power jack 11.
It comes into contact with the vertical wall piercing pin 14 inserted into the support hole 13 projecting from the vertical wall 12 of the bottom wall 1, and there are three adjusting nut cylinders 7 at the two positions on the left and right front of the bottom plate 1 and the one on the rear edge of the middle part. Is embedded in the vertical direction, and the adjusting bolt 2B is attached to the adjusting nut cylinder 7 at the lower end.
A large concrete block a screwed so as to project a desired length from the lower surface of the bottom plate 1 and provided with through holes 3 at one or several places of the bottom plate 1, and a liner plate 8 is laid below the adjusting bolt 2B and the jack receiving pin 10. Placed on the foundation concrete b and jacked, the large concrete block a
To the desired height, slide the adjusting bolt 2B and jack receiving pin 10 on the liner plate 8 with the pearl to correct the large concrete block a, and rotate the adjusting bolt 2B to rotate the large concrete block. Adjust the wall difference gradient and the right and left inclination of the block a as desired, and if necessary, attach the periphery of the gap between the bottom plate 1 and the foundation concrete b by an appropriate means, then remove the power jack 11 and through the through hole 3. A hardening filler is flowed in and hardened so that the upper and lower surfaces of the hardening layer 5 are engaged with the engaging groove 4 of the bottom plate 1 of the large concrete block a and the engaging portion 6 of the basic concrete b to form the large concrete block a foundation. It is characterized in that it is fixed on the concrete b so as not to slide back and forth.

Next, the construction work will be explained. The adjustment bolt 2B is positioned on the liner plate 8 laid on the basic concrete b, and the large concrete block a is moved to the basic concrete b.
It is the same as that of the first embodiment until it is lowered.

A jack receiving pin 10 is inserted into the center of gravity hole 9, a power jack 11 is placed on the jack receiving pin 10, and the upper portion of the power jack 11 is brought into contact with the vertical wall piercing pin 14 to perform a jack operation. Since the body a is lifted, the height can be adjusted to a predetermined level.

When the adjusting bolt 2B is screwed in in this state, the large concrete block a is supported by the jack receiving pin 10 and the adjusting bolt 2B.

The front-rear, left-right positional relationship is corrected by sliding on the liner plate 8 using the burls as described above.

Further, by adjusting the adjusting bolt 2B by screwing in, adjustment is made so as to be flush with the slope of the wall surface fixed next to it, and to fit right and left large concrete blocks a.

This state is held by a base material such as wedge, and at the same time, the periphery of the gap between the large-sized concrete block a and the basic concrete b is pasted, the power jack 11 is removed, and the hardening filler is allowed to flow in from the through hole 3 in the same manner as described above. The upper and lower surfaces of the hardened layer 5 after being hardened are the engaging recessed grooves 4 of the bottom plate 1 of the large-sized concrete block a and the engaging portion 6 on the basic concrete b.
To lock the large-sized concrete block a onto the concrete foundation b so that the large-sized concrete block a cannot move forward and backward.

Although the engaging portion 6 of the drawing shows a case where the parallel locking recessed line is formed, it may be of any type as long as it can prevent a required displacement such as a bolt or a reinforcing bar.

In the figure, reference numeral 15 is a reinforcing wall, 16 is a hanging hole, 17 is a connecting piece, and 18 is a drain hole.

〔The invention's effect〕

Since the present invention is as described above, for example, the retaining wall block is placed on the base, the right and left side end portions of the retaining wall plate are abutted exactly and the front surface of the retaining wall plate is in the correct position, When installed side by side with the correct height and correct posture, it is possible to easily maintain the correct posture by adjusting the vertical movement of the adjusting protrusions, and the hardening filler flows through the through hole into the gap between the concrete block and the base. It is hardened, and this hardened layer is engaged with the engaging groove of the bottom plate and the engaging part of the basic concrete, so that the large concrete block will be securely fixed on the basic concrete in a state that it cannot move back and forth. This is a construction method for large-scale concrete blocks that exhibit excellent features.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a perspective view of the first embodiment, FIG. 2 is a side view in which a part of the first embodiment is cut away, and FIG. 3 is a plan view of the second embodiment. FIG. 4 is a side view of the second embodiment. a: large concrete block, b: basic concrete, 1 bottom plate, 2 adjusting protrusion, 3 through hole, 4
...... Engagement groove, 5 ... Hardened layer, 6 ... Engagement part.

Claims (1)

[Claims] 1. A bottom plate of a large-sized concrete block is provided with an adjusting protrusion for installing the large-sized concrete block in a correct state and a through hole into which a hardening filler is poured, and the adjusting protrusion is adjusted so that the large-sized concrete block is placed on a foundation concrete. When installing the large-sized concrete block on the basic concrete by pouring the hardening filler from the through-hole after installing it in the correct position at the predetermined position, provide an engaging groove in the left and right direction on the lower surface of the bottom plate of the large-sized concrete block,
An engaging part that engages the hardened layer of the hardening filler is provided on the basic concrete, and the upper surface of the hardened layer is engaged with the engaging groove and the lower surface is engaged with the engaging part, and the large-scale concrete block is moved back and forth on the basic concrete. A method for constructing large concrete blocks, which is characterized by immovably installing and fixing.