JP4389007B2 - Concrete canal - Google Patents

Description

  The present invention relates to a concrete water channel that constitutes water, drainage, and other water channels, and in particular, provides an excellent joint construction structure for an end face connecting portion of a so-called U-shaped concrete block having a U-shaped groove for flowing water. Is.

A concrete water channel, for example, a concrete U-shaped water channel, is configured by connecting a large number of U-shaped concrete blocks to the end faces.
The conventional joint construction structure of the end face connection part of each U-shaped concrete block is a waterproofing plate (joint board) usually called elastite or kentite between the narrow end faces of the U-shaped concrete block, whether newly installed or renovated. Only a single piece was sandwiched and arranged.

However, the volume fluctuation due to the expansion and contraction of the concrete block due to the rapid and repeated changes of temperature, humidity, etc. in the surrounding environment of the concrete U-shaped drainage groove and the long-term abnormal continuation of high or low temperature and the sudden change However, the joint plate made of elastite or ketite alone cannot be absorbed and deteriorates due to plastic deformation such as cracking, crushing, cracking or rising of the joint plate. In some cases, the concrete block itself will crush the joint plate and break it.
Furthermore, the joint plate itself deteriorates due to ultraviolet rays or the like. As a result, the service life of the concrete U-shaped drainage groove is extremely short-lived, and the joint construction structure or concrete block has to be repaired in a short period of time.
Incidentally, the lifetime of the joint plate according to the prior art is 5 to 10 years due to the deterioration phenomenon.
The present invention provides a long-term joint joint in a U-shaped drainage groove with excellent long-term durability, which can greatly extend the period until the next renovation, whether at the time of new installation or renovation. It provides long life for the entire drainage channel.

  The present invention has responded to the above-mentioned problems, and the feature thereof is the following (1).

(1) As a construction structure for joints connecting side end surfaces of adjacent concrete blocks (100, 101) in a concrete water channel constructed by connecting the side end surfaces of a plurality of concrete blocks having grooves for flowing water The elastic seal joint material layer (300) is arranged between the side end faces (100R, 101L) of the adjacent concrete blocks (100, 101), and both side end faces (300R, 300L) of the elastic seal joint material layer (300) are arranged. ) And a concrete block (100, 101) side end face facing each other, a tough mortar layer (401, 402) containing resin and glass fiber is disposed.

The present invention relates to a concrete U-shaped water channel formed by connecting end faces of a water flow channel, for example, a concrete block having a U-shaped groove, and the end surface connecting portion of each concrete block is newly installed or modified. As a joint construction structure, by making a sandwich structure of the above-mentioned high tough mortar layer, elastic seal joint material layer, and high tough mortar layer, rapid change of temperature, humidity, etc. in the surrounding environment of concrete U-shaped waterway Absorbs the expansion and contraction of the concrete block due to repeated high-temperature or low-temperature abnormal continuation and its sudden change over a long period of time without cracking or other plastic deformation, suppressing damage to the concrete block and joint construction structure, The service life is greatly improved.
Therefore, the concrete water channel of the present invention can greatly extend the period until the next renovation.
In addition, it can be expected to make a significant contribution to environmental problems because it can be repaired without breaking water-flowing grooves such as U-shaped grooves in concrete blocks.

1. Significance of high-toughness mortar layer In the present invention, the high-toughness mortar layer containing resin and glass fiber has a longitudinal direction and a width directly applied from the concrete block by firmly bonding and bonding one end face to one end face of the concrete block. It does not separate from expansion / contraction of the direction and up / down / left / right and other displacements, and follows up and cushions without damaging so as to reduce the propagation stress to the elastic seal joint material layer.
2. Significance of Elastic Seal Joint Material Layer In the present invention, the elastic seal joint material layer is, for example, an embossed surface of both end faces of a bonnel tight layer (trade name: surface embossed resin foam joint plate manufactured by Aoi Chemical Industry Co., Ltd.). Each of these is tightly bonded to the end surface of the high toughness mortar layer to completely prevent displacement, and finally the propagation stress due to the displacement of the concrete block tempered through both high toughness mortar layers is absorbed and collapsed, peeled off, etc. Is reliably prevented and water leakage is advantageously prevented.
In the present invention, for example, thiolex bond (trade name: polysulfide polymer (polysulfide rubber) manufactured by Aoi Chemical Industry Co., Ltd.) is mainly used as a perfect measure against water leakage around the elastic seal joint material layer and the high tough mortar layer. It is preferable to dispose a two-component elastic sealing material as a raw material.

FIG. 1 is an explanatory plan view showing a joint construction structure of an end face connecting portion of a concrete block in a concrete U-shaped waterway of Example 1 of the present invention.
FIG. 2 is a cross-sectional explanatory view taken along arrow AA in FIG.
FIG. 3 is a longitudinal cross-sectional explanatory view of the joint structure from the arrow BB in FIG.
FIG. 4 is a graph showing changes in compressive strength of the high toughness mortar (premix) in Example 1.
1, 2, and 3, as the joint construction structure of the end face connecting portion 200 of each concrete block 100, 101 having the U-shaped groove M, the Bonnel Tight elastic seal joint material layer 300 is arranged in the middle, High-toughness mortar layers 401 and 402 containing resin and glass fiber are disposed between the side end faces 100R and 101L of the concrete blocks 100 and 101 facing both end faces 300R and 300L, respectively. As shown in FIG. 3, the inner surface of the groove is coated with the cholex bond as a water-stopping material 500. FIG. 3 (1) shows a bonnel exposed to the groove side by forming the water-stopping material 500 into a dome shape. This is an example of covering the entire surface of the tight elastic seal joint material layer 300 and the surface portions of the high tough mortar layers 401 and 402 adjacent to the tight elastic seal joint material layer 300. Stepped recess formed in recess It is obtained by filling in.

Therefore, Table 1 quantitatively shows the amount of expansion and contraction of the concrete block due to temperature fluctuations and repeated drying and wetting, and the bonnel tight elastic seal joint material layer 300 and the high toughness mortar layer 401 of the joint construction structure 200 that can cope with it. In addition to the length and thickness of each layer of 402, a representative raw material blending design example of a blending example of the bonnetite elastic seal joint material layer 300 and the tough mortar layers 401 and 402 is shown.

上記表１に記載の各目地施工構造部例の物性値を表２に示し、圧縮強度の変化を表３と図４に示す。

Table 2 shows physical property values of the joint construction structure examples shown in Table 1 above, and Table 3 and FIG. 4 show changes in compressive strength.

The physical property values of the elastic seal joint material layer (Bonnell Tight) 300 are as follows.
(A) Shear strength: 0.20 N / mm ²
(B), 1/2 compression strength: 0.26 N / mm ²
(C) Restoration rate: 97%
(D), water absorption: 0.3%
(E), Hardness: 54 (Test value of original plate before surface embossing)
(F) Apparent density: 0.073 g / cm ³
(G) Foaming ratio: 14 times

<Summary of Examples>
In Example 1, the high-tough mortar layers 401 and 402 containing resin and glass fiber are used to directly bond one side end face to one side end face of the concrete blocks 100 and 101 and directly from the concrete blocks 100 and 101. The expansion and contraction in the longitudinal direction and the width direction, up and down, left and right, and other displacements are not separated, and follow-up cushioning without damaging can significantly reduce the propagation stress to the elastic seal joint material layer 300 in the middle It was.
For this reason, each end face of each side of the bonnerite elastic seal joint material layer 300 is tightly joined to each end face 100R, 101L of the tough mortar layers 401 and 402, and is softened through the both tough mortar layers 401 and 402. Finally, the propagation stress caused by the displacement of the concrete blocks 100 and 101 is surely absorbed to completely prevent the concrete blocks 100 and 101 and the tough mortar layers 401 and 402 from being crushed and separated, and the water-stopping material 500. And water leakage could be prevented. It has become possible to ensure a long life span of 10 to 20 years or longer.

As described above, the present invention is a concrete U-shaped water channel formed by connecting end surfaces of a water flow channel, for example, a concrete block having a U-shaped groove, as the concrete water channel. As a joint construction structure for new construction or refurbishment, the temperature in the surrounding environment of the concrete U-shaped waterway can be obtained by making a sandwich structure of the above-mentioned high-toughness mortar layer and, for example, a bonner tight elastic seal joint material layer and a high-toughness mortar layer. The concrete block and joint construction are absorbed without cracking cracks and other plastic deformations by absorbing the expansion and contraction of the concrete block due to repeated sudden changes such as humidity, abnormal continuation of high temperature or low temperature over a long period of time and sudden changes. It suppresses damage to the structure and greatly improves its useful life. That.
For this reason, the concrete water channel of the present invention can greatly extend the period until the next renovation.
In addition, it can be expected to make a significant contribution to environmental problems because it can be repaired without breaking water-flowing grooves such as U-shaped grooves in concrete blocks.
Since the present invention exhibits such an excellent effect, it can be applied to the construction and renovation of all irrigation water, drainage and other waterways such as agricultural and industrial use, and can achieve a long life. The above applicability is extremely high.

It is plane explanatory drawing which shows the joint construction structure of the end surface connection part of the concrete block in the concrete U-shaped waterway of Example 1 of this invention. It is a cross-sectional explanatory drawing from arrow AA of FIG. It is a longitudinal cross-sectional explanatory drawing of the joint structure part from arrow BB of FIG. 1, (1) and (2) show the difference in the coating method of a water stop material. 2 is a graph showing changes in compressive strength of a high toughness mortar (premix) in Example 1.

Explanation of symbols

M U-shaped groove
100, 101 concrete block
100R, 101L side end face
200 End face connection
300 Elastic seal joint layer (Bonnell Tight)
300R, 300L Both end faces of elastic seal joint material layer (Bonnell Tight)
401, 402 Tough mortar layer
500 Water-stop material (thiolex bond)

Claims (1)

Adjacent concrete as a construction structure of joints connecting the side end faces of adjacent concrete blocks (100, 101) in a concrete waterway constructed by connecting the side end faces of a plurality of concrete blocks having water flow grooves The elastic seal joint material layer (300) is arranged between the side end faces (100R, 101L) of the block (100, 101) and faces both side end faces (300R, 300L) of the elastic seal joint material layer (300). A concrete water channel comprising a high-toughness mortar layer (401, 402) containing a resin and glass fiber disposed between end faces of a concrete block (100, 101).

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