JPH0245347Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is applicable to precast concrete products, such as concrete for construction of long waterway blocks, wide waterway blocks, box culverts, gate-type culverts, etc. Regarding products, it relates to products whose height can be adjusted.

[Conventional technology and its problems]

In recent years, the above-mentioned construction concrete products have become larger in size and are often produced with extremely heavy weight, and these products have gained popularity due to their high construction accuracy.

Therefore, when on-site construction of the above-mentioned products is carried out, it is usually installed on the foundation concrete that has already been constructed, but it is extremely difficult to finish the surface of the foundation concrete flat and smooth. So, almost always, there will be slight unevenness,
Even if the surface of the product was smoothed, the unevenness made it impossible to bring the installation surface of the product into close contact with the foundation concrete.

For this reason, the method used was to spread dry mortar smoothly to an allowable thickness and then install the product on top of it. Fine adjustment work must be done to match the reference surface while making adjustments, which is time-consuming.Also, it may be necessary to drive wedges etc. while leveling the dry mortar first, but the result is Generally speaking, a gap always occurs between the air-mixed mortar and the product, and after the product is installed, it is not integrated into the structure due to leakage from the back side or separation from the foundation concrete.

Therefore, after construction, products may sag over time. For example, in the case of waterways, product waterways that should have a normal, uniform slope may become uneven and overflow over time after completion. In the basin, problems may occur due to a decrease in the flow rate of waterways, and in the case of retaining walls, etc., gaps have already been created as described above, so in the event of an earthquake, etc., excessive loads may be applied locally. As a result, there is a problem in that the structure lacks stability and may be damaged.

[Means for solving problems]

In order to solve the problems of the conventional technology as described above, the inventor of this invention has conducted various studies and found that in order to install construction concrete products at the designed height on top of the foundation concrete, it is necessary to It was concluded that if the height of a concrete product is adjustable and a gap is created between the installation surface and the foundation concrete as a result of the height adjustment, the gap should be filled with mortar or the like. Therefore, the present invention was developed with the aim of providing a concrete product whose height can be adjusted.The structure of this invention is to provide a concrete product for construction with a plurality of notches on the surface in contact with the foundation concrete. A cylindrical body integrally provided at the lower end with a flanged body containing an adjustment fixing nut is embedded in the upper surface of the notch, and the bolt head is provided with a hemispherical head or the like. A pedestal having legs on the lower outer periphery and a recess corresponding to the head on the center side is fixed to the part by fitting the recess into the head, and screwing the bolt into the nut. It is characterized by:

[Effect of invention]

In other words, when the concrete product for construction of this invention is installed on the foundation concrete, if the height is not as designed, the bolt head can be rotated with a wrench etc. so that the pedestal is tightly attached to the foundation concrete. By adjusting the height while
It can be installed at the height as designed.

〔Example〕

Next, an example of implementation of the present invention will be explained with reference to the drawings.

In the diagram, A is a concrete product for construction, F
is the foundation concrete, and the concrete product A
Notches 2 of appropriate depth are provided near the four corners of the bottom surface 1 in contact with the foundation concrete F, and a flange-like body 5 containing an adjustment fixing nut 4 inside the upper surface 3 side of the notches 2 is integrated at the lower end. A bolt 7 has a cylindrical body 6 provided therein in a non-rotatable manner, and a bolt head 8 having a hemispherical head 9. A leg 1 is attached to the head 9 of the bolt 7 at the lower part of the outer periphery.
1, and a pedestal 10 having a recess 12 corresponding to the shape of the head 9 on the center side thereof is fitted into the recess 12, and fixed by means such as caulking 13, and the bolt 7 is adjusted as described above. The threaded part of the bolt 7 is screwed into the cylindrical body 6 in the normal state.
The bolt head 8 is located close to the nut 4, the head 9 of the bolt 7 and the pedestal 10 are located in the notch 2, and the leg 11 of the pedestal 10 is placed in the concrete product A.
It is positioned above the bottom surface 1 of the.
In the figure, 20 is an injection hole for grout, etc. provided in the bottom plate of concrete product A, and 21 is also an exhaust hole, and the above constitutes an example of the concrete product for construction of the present invention.

Incidentally, when producing the above-mentioned concrete product A, the cylindrical body 6 and the brim-like body 5 are placed in predetermined positions before pouring concrete, and the fixing nut 4 is coated with an adhesive or the like on its outer periphery. Then, the bolt 7 is screwed into the nut 4 until the head 8 approaches the nut.

An example in which the above concrete product A is installed on an already constructed foundation concrete F will be described as follows.

Place the product A on the foundation concrete F, and turn the heads 8 of the bolts 7 at the four corners with a spanner or the like to adjust the height to the predetermined standard height, so that the lower surface of the leg of the pedestal 10 comes into contact with the foundation F. and adjust the height of the product until it matches a predetermined reference height.

Next, the corners of the outer periphery of the product A on the foundation concrete F are dammed with mortar or concrete C, and the superfluid expansion mortar 22 is poured into the gap 2 between the foundation concrete F and the product A through the grout injection hole 20.
However, since the outer periphery of product A is closed with mortar or concrete C, the air in the gap 23 is expelled from the exhaust hole 21 by the injection, so that the superfluid expanding mortar 2
2 is reliably injected, expands, and spreads to every corner of the gap 23, and hardens to bring them into close contact and integrate them.

[Effect of idea]

The present invention is as described above, and the reference plane can be easily adjusted using adjustment bolts placed near the four corners of the bottom of a construction concrete product, and only grouting work remains after height adjustment. According to
The site work is separated, and the product installation work is done quickly and reliably.As shown in the example, if you grout with expandable mortar, it will expand and harden in the gaps between the product and the foundation concrete, so that every corner will be covered. Since the product is spread and firmly adhered, the product is integrated with the foundation concrete, and the problems of the prior art mentioned above can be completely solved.

As shown in Figure 1, when installing products continuously, make a cut in each product at a position that does not interfere with the installation work, and lay them in parallel or in series to separate the construction sections and carry out the above work. If you repeat
Safe and reliable construction can be carried out economically, easily and quickly.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the concrete product of the present invention being laid continuously, Figure 2 is a sectional view of the main parts of the product installed on foundation concrete, and Figure 3 is the same as Figure 2. It is a sectional view of the state in which the height has been adjusted and the four circumferences on the foundation have been dammed with mortar or concrete. A... Concrete product for construction, F... Foundation concrete, 1... Bottom of product A, 2... Notch, 3... Top surface of notch 2, 4... Fixing nut for adjustment, 5... Flange shape Body, 6... Cylindrical body, 7... Bolt, 8... Bolt head, 9... Hemispherical head,
10... pedestal, 11... leg of pedestal, 12... recess of pedestal, 20... injection hole for mortar etc., 21...
Exhaust hole.

Claims (1)

[Scope of utility model registration request] In construction concrete products, a rotating cylinder is provided with multiple notches on the surface that contacts the foundation concrete, and a flange-like body containing a fixing nut for adjustment is integrally provided at the lower end inside the upper surface of the notches. The head of a bolt is buried in a way that it cannot be buried, and the bolt head is provided with a hemispherical head, etc., and a cradle is attached to the head, which has legs on the lower part of the outer periphery and a recess corresponding to the head on the center side. A concrete product for construction whose height is adjustable, characterized in that the recess is fitted and fixed, and the bolt is screwed into the nut.