JP2689098B2 - Method of repairing water channel cavity and cohesive adherent used for it - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for repairing a water channel cavity formed on a joint surface between a concrete structure constructed adjacent to soil and the soil.

[0002]

2. Description of the Related Art Concrete structures such as tunnels, dams, levees, slope reinforcements, etc. are constructed adjacent to soil by hollowing or cutting open mountains. When such a concrete structure is constructed, the water channel that was naturally formed in the ground before the construction is blocked, so that a new water channel is formed at the joint surface between the concrete structure and the soil. Become. Then, after a long period of time has passed after the concrete structure was constructed, the water channel gradually becomes large due to soil erosion, and a large amount of earth and sand is discharged, so that it becomes a large cavity, that is, a water channel cavity. Since such a water channel cavity causes a rock fall and a rock fall, and thus has a risk of collapsing a concrete structure, it is necessary to repair the buried structure. As a method of burying and repairing this water channel cavity, conventionally, a method of burying the water channel cavity by inserting finely cut foamed polystyrene, old tires, etc. into the water channel cavity is used. Also, if a waterway cavity is formed near the revetment wall or road retaining wall provided on the dam lake shore, after quarrying in the waterway cavity,
The method of placing concrete is adopted.

[0003]

However, in the method of introducing cut products such as styrene foam and old tires into the water channel cavity, it is possible to fill the water channel cavity once and obtain some reinforcement effect, Since styrene foam, old tires, etc. do not have water permeability, these substances completely block the escape route of water, and a new water channel is immediately formed in the vicinity of the filled part. As a result, another repair work will be required immediately. Also, when the waterway cavities near the revetment wall, road retaining wall, etc. are repaired by the method of placing concrete after quarrying, when the above method is adopted due to the impermeability of concrete. The same problem will occur.

An object of the present invention is to solve the above-mentioned problems and to provide a repairing method for a water channel capable of effectively burying and repairing a water channel cavity.

[0005]

The structure of the first invention is a construction method for burying and repairing a water channel cavity formed between an outer wall of a concrete structure and soil, wherein: The purpose of the present invention is to fill a spherical or polyhedral aggregated adhered material in which ceramic spheres are adhered by cement and an admixture. The structure of the second invention is that in the repairing method, the specific gravity of the agglomerated adhered matter is set to 1.0 or less, and the structure of the third invention is such that, in the repairing method, the specific gravity of the ceramic sphere is 3 mm ~ 5 under 0.6
It has a diameter of 0 mm. Meanwhile, the fourth
The structure of the invention is for repairing a waterway cavity formed by mixing a ceramic sphere having a specific gravity of 0.6 or less and a diameter of 3 mm to 50 mm, cement, and an admixture, and coagulating and solidifying into a spherical shape or a polyhedral shape. It is in a coagulated and adhered substance.

[0006]

In the repairing method according to the first aspect of the present invention, the agglomerate adhered matter is filled in the water channel cavity, but since the agglomerated adherent matter has a spherical or polyhedral shape and is easily rolled, the filling operation is Very easy. Then, the coagulated and adhered matter filled in the channel cavity serves as an obstacle that blocks the sediment that is about to flow out through the channel cavity. Further, the cohesive adherent has a structure in which the ceramic spheres are firmly adhered by the cement and the admixture, and has extremely high strength, so that it effectively functions as a reinforcing material after being filled in the water channel cavity. . In addition, the cohesion-adhered material does not have to be crushed when it is filled into the waterway cavity because it has appropriate voids and is lightweight and has high strength. Also form a proper void. Therefore, the repaired water channel cavity will have appropriate water permeability, despite the fact that it is filled with agglomerated adherents.
An escape route for water is secured. Therefore, no new water channel cavity is formed in the portion adjacent to the repaired portion.

On the other hand, as in the second aspect of the invention, when the specific gravity of the cohesion-adhering material is set to 1.0 or less, the coagulation-adhering material floats on the water, so that the coagulation-adhering material together with water goes deep into the channel cavity. By adopting the method of pouring, the repair work of the water channel cavity having a complicated shape is also possible.

Further, when the agglomerated adherent is formed by using the ceramic spheres having a specific gravity of 0.6 or less and a diameter of 3 mm to 50 mm as in the third invention, the agglomerated adherent is very lightweight, Since it has high strength and good water permeability, the function of demonstrating coagulated and adhered substances in the filled channel cavity, that is, the various functions such as sediment outflow prevention function, reinforcement function, and water permeability function is more reliable. Will be high.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. [Production of agglomerated and adhered matter] (1) Ceramic sphere An aqua ball (a lightweight core material coated with ceramic) commercially available as a horticultural material was used as a ceramic sphere. The average specific gravity of this ceramic sphere is about 0.5
And the average diameter was about 30 mm. (2) Cement Commercially available alumina-silica Portland cement was used. (3) Admixture NIX which is an admixture containing calcium and iron oxide as main components
-1000 (manufactured by Nyx Co., Ltd., solid content: about 5 to 7)
%). (4) Fixing of ceramic sphere About 900 kg of the above ceramic sphere and about 230 cement
After mixing kg, about 35 liters of NIX-1000 which is an admixture, and 80 liters of water, they are sufficiently kneaded, and further divided into spherical lumps of an appropriate size and dried to obtain a specific gravity of about A spherical aggregated adherence product of 0.9 was obtained. The obtained cohesion-fixed product is shown in FIG. 1 (note that FIG. 1B shows an enlarged cross-section of a part of the cohesion-fixed product). Reference numeral 1 denotes a cohesive adhered substance, in which a myriad of ceramic spheres 2, 2 ... Having a large number of bubbles inside are adhered in an agglomerated state by cement and an admixture 3. Further, the cohesion-adhering material 1 has appropriate voids between the adjacent ceramic spheres 2, 2, ... And has high water permeability. In addition, it has a structure in which a myriad of ceramic spheres having an average diameter of about 30 mm are firmly fixed by cement and an admixture, so that the strength is extremely high.

[Water channel cavity repair work] Fig. 2 shows the water channel cavities formed on the joint surface between various concrete structures and soil. The water channel cavities 4, 5 and 6 are the slopes of the mountain. It is formed on the junction surface between the slope reinforcement 7 constructed in No. 7, the revetment wall 8 of the dam lake, and the tunnel 9 constructed through the mountain and the soil 10. The repair work of each waterway cavity 4, 5, 6 is carried out by the myriad of cohesive adherents 1, 1, ...
Is poured into the cavities together with water by filling the inside of each of the water channel cavities 4, 5, 6 with the cohesive adherents 1, 1. In addition, each agglomerated adhered matter 1, 1 ...
Has a specific gravity of about 0.9 and floats on water, so
Even if it has such a complicated shape as described above, it can be poured into the depth of the water channel cavity together with the water while floating on the water. Therefore, a water channel cavity having a complicated shape such as 5 can be filled with the cohesive adhered substances 1, 1 ... Without any problem. In addition, since the cohesive adherents 1, 1, ... Are lightweight and have extremely high strength, they will never be crushed even if a large amount of them are poured at once, or even if they are piled up, they will be positioned below. What you do will not be crushed. Therefore, an appropriate space is formed between the aggregated and adhered substances filled in the water channel cavity.

In the repaired water channel cavity, the filled cohesive solidified material functions as an obstacle, so that the situation in which earth and sand flow out through the water channel cavity is effectively prevented. Further, the aggregated and adhered material has extremely high strength and effectively reinforces the inside of the water channel cavity, so that the occurrence of the situation of falling rocks, rock fall, and collapse of the concrete structure in the vicinity of the water channel cavity is prevented. Furthermore, the coagulated adhered matter filled in the water channel cavity has an appropriate space between the coagulated adhered matter inside and around the coagulated adhered matter, and the water permeability is good. Since the escape route is secured, a new waterway cavity will not be formed in the part adjacent to the repaired place.

Although the aqua balls are used as the ceramic spheres in the above embodiment, the ceramic spheres are not limited to the aqua balls, and the surface of the crushed particles of the construction material such as ALC or Hebel is coated with the ceramic. The surface of slag generated during iron making may be coated with ceramic, the surface of crushed stone from volcanic eruption may be coated with ceramic, or the surface of foamed styrene may be coated with ceramic. In these ceramic spheres, the core material is lightweight, and the surface is covered with ceramic to have sufficient waterproofness, so that the aggregated and solidified product can be made lightweight and not easily broken. Further, the cement is not limited to the alumina-silica type Portland cement, and slag cement, alumina cement, mixed cement and the like can be used. Furthermore, the admixtures other than NIX-1000 are
Commercially available products such as SR-3 (manufactured by Asia Construction Materials Co., Ltd.), MR-7 (manufactured by Kichicho Shoji Co., Ltd.) and Pneumolan (manufactured by Kumano Suisu Co., Ltd.) can be used. In addition, the mixing ratio of the ceramic spheres, the cement, the admixture, and the water in producing the aggregated solidified product is not limited to the above examples, and can be appropriately changed as necessary. Note that the shape of the aggregated and adhered material is not limited to a spherical shape, and may be formed in a polyhedral shape.

Further, in the above-mentioned examples, the cohesion-fixed material whose specific gravity was adjusted to 0.9 was used, but the specific gravity of the cohesion-fixed material is not limited to this value. The specific gravity is preferably 1.0 or less from the viewpoint that a method of floating on water and flowing into the waterway cavity together with water can be adopted. It is particularly preferable because the aggregated and adhered substance of (1) has a better fluidity. Further, the diameter of the ceramic spheres forming the agglomerated adhered matter is not limited to the numerical values in the above-mentioned examples, but is preferably 3 mm or more and 50 mm or less. If it is 3 mm or more, the water permeability of the agglomerated and adhered material is lowered, and conversely, if it is 50 mm or more, the affixing strength due to the cement and the admixture is lowered, and the strength of the agglomerated and adhered material is lowered, which is not preferable.

As described above, the agglomerated and adhered material is lightweight and has both high strength and water permeability, so that it can be diverted to other uses, for example, it can be formed into a plate shape to form a desert. It is also possible to use it as a soil for cultivating plants (including cultivation of agricultural crops) in a desert or a semi-arid area, etc. In this case, water and nutrients in the soil can be stored in many voids inside the plate-like aggregated adhered substance, and due to the presence of many voids, the plate-like aggregated adhered substance has good heat retention and air permeability. , Because it exerts water permeability, adjusts the microflora balance in the soil, and gives vitality to the soil, the plate-like aggregated adhered matter is
It is suitable for plant growth and significantly promotes plant growth. Therefore, it is possible to cultivate plants even in a desert or a semi-arid area.

[0015]

According to the repairing method of the first invention,
Since the channel cavity is filled with the coagulated adhered matter, it is possible to prevent the sediment from flowing out through the channel cavity. Moreover, since the strength of the cohesion-adhering material is extremely high, it is possible to effectively prevent the situation of falling rocks, falling rocks and collapse of the concrete structure in the vicinity of the water channel cavity, and the water permeability of the coagulation-adhering material is good. , Because the escape route for water is secured,
The need for re-repair is eliminated because no new channel cavity is formed in the area adjacent to the repair site. Further, according to the repairing method of the second invention, even when the water channel cavity has a complicated shape, it is possible to easily perform the buried repair without any problem, and further, in the third invention. According to such a repairing method, the aggregated and adhered substance filled in the water channel cavity is lighter in weight, has higher strength, and is excellent in water permeability.
The effects obtained by the invention and the second invention are more reliable.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an aggregated and adhered material of an example.

FIG. 2 is an explanatory diagram showing a water channel cavity formed on a joint surface between a concrete structure and soil.

FIG. 3 is an explanatory view showing a state where the aggregated and adhered material is used as a plant cultivation soil.

[Explanation of symbols]

1 ・ ・ Cohesive adherents, 2 ・ ・ Ceramic spheres, 3 ・ ・ Cement and admixture, 4,5,6 ・ ・ Water channel cavity, 7 ・ ・ Slope reinforcement, 8 ・ ・ Revetment wall, 9 ・ ・ Tunnel, 10 ・ ・ Soil, 11 ・ ・ Plate-like agglomerated and fixed matter, 12 ・ ・ Soil, 13 ・
・ Soil, 14 ・ ・ Cultivated plants.

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location E02F 5/10 F16L 1/038 // C09K 103: 00

Claims (4)

(57) [Claims] 1. A method for burying and repairing a water channel cavity formed between an outer wall of a concrete structure and soil, wherein ceramic spheres are fixed by cement and an admixture in the water channel cavity. A repairing method for a waterway cavity, which comprises filling a spherical or polyhedral aggregated adherent substance. 2. The method for repairing a waterway cavity according to claim 1, wherein the specific gravity of the aggregated adhered matter is 1.0 or less. 3. The method for repairing a waterway cavity according to claim 1, wherein the ceramic sphere has a specific gravity of 0.6 or less and a diameter of 3 mm to 50 mm. 4. A cohesion for repair work of a waterway cavity formed by mixing a ceramic sphere having a specific gravity of 0.6 or less and a diameter of 3 mm to 50 mm, cement, and an admixture, and coagulating and solidifying into a spherical shape or a polyhedral shape. Sticky matter.