JP3291653B2 - Method for preserving structures such as drainable paved roads - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for improving the permeability of rainwater falling on a motorway on which various automobiles run and a sidewalk through which ordinary people pass, or for cleaning roads and tunnels for cleaning dirt adhering to road surfaces. It relates to a method for preserving structures.

More specifically, it is possible to prevent rainwater from entering into the voids of a porous material forming a surface layer of a road, to prevent freezing, or to generate fine powder and dust in the air due to wear of tires of a running automobile. And the like are methods for removing the clogging that occurs in a pavement surface made of a porous material and entering the space, thereby constantly maintaining water permeability and drainage.

[0003]

2. Description of the Related Art Conventional maintenance methods, such as cleaning of water-permeable roads and drainage roads, use various cleaning machinery and equipment such as a sweeper car, a high-pressure cleaning device, a brush, and a vacuum car to remove dirt attached to the surface of the road. The so-called mechanical operation was used.

[0004] In addition, in order to prevent rainwater that accumulates on the surface of the road in winter and rainwater that enters into the voids in the surface layer of the road, at least one of calcium chloride, magnesium chloride and sodium chloride is formed on the surface of the road in order to melt them. A large amount of an aqueous solution of one or more salts is sprayed.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to use such a mechanical device in comparison with a conventional method for cleaning a road, which is performed mechanically using various cleaning mechanical devices. That is, we did not have to.

Another object of the present invention is to provide a method of spraying a large amount of a salt solution on a road surface, which is more likely to cause salt damage to a vehicle, a river, a house, a plant, and the like near a road by using the solution. It is not to give.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a method for preserving a structure such as a drainable pavement road, the method comprising: improving a soil composition comprising a cationic organic polymer on a surface of a road to which dirt is attached; The agent adheres in a state of being mixed with water and a higher alcohol-based surfactant. At that time, the Coulomb force acts between particles constituting dirt adhering to the road and particles constituting the aggregating agent. Then, the dirt is displaced along the surface of a structure such as a road, that is, slides to form aggregates so that the dirt is easily separated from the surface of the road or the granular aggregate.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for preserving a structure such as a drainable pavement road according to the present invention will be described with reference to the drawings. As shown in FIG. 1 and FIG. 2, an agglutinating agent for soil improvement 3 composed of a cationic organic polymer is sprayed on an upper surface of a drainage pavement layer 2 constituting an upper layer of a road 1 in an approximately 1000-fold aqueous solution. It adheres by spraying from the nozzle as indicated by an arrow 3A, and the dirt adhering to the surface of the drainable pavement layer 2 is aggregated by the electrostatic action of the aggregation agent 3.

This state will be described with reference to FIGS.
The road 1 comprises an impermeable pavement layer 6 and a drainage pavement layer 2 formed thereon.
Form voids 8 between a number of granular aggregates 7.

[0010] Immediately after such a road is newly constructed, as shown in FIG. 3, the surface of the granular aggregate 7 is free from dirt such as dust and the gap 8 is not clogged. Rain water 9 flows through the gaps 8 between the granular aggregates 7 in the direction of arrow A9, and furthermore, the impervious pavement layer 6 is formed by a road gradient that is inclined downward from the median strip 20 toward the gutter 10. Flows in the direction of the arrow A <b> 6 along the upper surface 6 a, and flows into the side groove 10.

However, after a certain period of time when an automobile or the like travels on the road 1, dusts and dirt such as tires and the like caused by wear of the tires and the like are removed from the drainage pavement layer 2 as shown in FIG. It adheres to the surface or penetrates into the void 8 and adheres to the surface of the granular aggregate 7, causing a clogging phenomenon of the void 8 of the drainable pavement layer 2, and the rainwater does not flow into the gutter 10 and the road 1
The surface of the car may be flooded with rainwater, or it may freeze in winter, hindering the driving of the car.

In the present invention, as described above, an aqueous solution of the aggregating agent 3 is sprayed on the surface of the drainage pavement layer 2 of the road 1 as shown in FIG. 5 to 7 in which this state is further enlarged, a cationic charge is applied to the anionic particles 5a constituting the dirt 5 attached to the surface of the granular aggregate 7 shown in FIG. When the cationic particles 3a constituting the agglomerated agent 3 having the following are sprayed, a Coulomb force f acts between the cationic particles 3a and the anionic particles 5a adjacent to the cationic particles 3a as shown in FIG. The displacement Δx slightly causes the anionic particles 5 a to weaken the adhesive force to the surface of the granular aggregate 7 and gradually form aggregates 11 as shown in FIG. At this time, the cationic particles 5b constituting the dirt 5 are mixed with the anionic particles 5 forming the aggregates 11.
It is pulled by the electric charge of a and adheres to the aggregate 11 to make it larger.

When rainwater or the like is supplied to the surface of the drainable pavement layer 2 in this state, the aggregates 11 are separated from the surface of each of the granular aggregates 7 and fall into the gaps 8 as shown in the left half of FIG. It flows and eventually flows out along the upper surface of the impermeable pavement layer 6 toward the gutter 10.

Therefore, the dirt 5 disappears in the void 8 in the drainage pavement layer 2 after that, the rainwater does not overflow on the surface of the road 1, and the water does not freeze in winter. It does not hinder the driving of the car.

Further, instead of supplying rainwater or the like on the road 1 to flow the aggregates 11 into the side grooves 10, the present invention
It is also possible to remove the aggregates 11 from the inside of the gap 8 by sucking the surface of the road with a vacuum truck or the like.

Further, as shown in FIG.
When spraying a mixture of salt calcium chloride 4 and the binding agent 3 before spraying, FIG.
Even if rainwater 9 remains in the gap 8 as shown on the right side of
The calcium chloride 4 can prevent freezing.

As shown in FIGS. 1 and 2, sewage 12 containing dirt 5 flowing in the gap 8 between the granular aggregates 7 and flowing into the gutter 10 along the water-impermeable pavement layer 6a is removed from the road. Suction pipe 17 of pump 16 loaded on control vehicle 15
From the suction port 18 and separated by the separation device shown on the road management vehicle 15 and the remaining washing water is stored in the water tank 14 which also serves as a separation tank, and is reused as an aqueous solution of the aggregating agent. .

In this case, even if harmful substances contained in the exhaust gas of a general automobile running on the road are contained in the dirt 5, only the dirt 5 can be separated from the washing water. Therefore, the amount can be reduced, which is convenient for the subsequent processing.

[0019]

[Experimental example] Plane 10m ² (1m × 10m) on the road having the sectional structure shown in Fig. 3 constructed in June 1990 before this application
The experiment on water permeability was conducted on the road, but the plane on the road constructed for the experiment has been clogged with dirt in the voids since a long time has passed since the construction, and the rainfall of 5 to 10 mm / hour Then, rainwater accumulated on the road surface and running water was generated on the surface.

Also, a plane 10 m ² (1 m
20 l of a 1000 times aqueous solution of the following aggregate material was sprayed during rainfall, rainwater did not accumulate on the surface of the road even at a rainfall of 10 to 20 mm / hour. Did not occur.

Furthermore, another plane 10 m ² on the same road as above
(1m × 10m) and the same aggregating agent 2-3 l / m ²
Was sprayed before rainfall, and the same result was obtained when it rained at the same rainfall. Aggregating agent (product name: EB-A) (Hayashi Chemical Industry Co., Ltd.) Feature 1: Instantaneously react and combine with particles that have a positive charge and make up soil with a negative surface charge to form an aggregate 2: A chain-like organic polymer with a long molecular length, which is linked by charge and further linked, cross-links to form a three-dimensional network structure. 3: When it acts on earth and sand, it condenses fine particles and aggregates the entire earth and sand. Increase the erosion resistance of the soil 4: by aggregating the soil with neutral chemical components
Main component: Complex of magnesium salt of dimethylaminoethyl methacrylate acrylate and polyethyleneimine Viscosity: 3000-9000CP (25 ° C) PH: 5-7 Solubility: Optional with water Appearance: Almost transparent, colorless viscous liquid Surfactant (product name, New Osmac) (manufactured by Dojosha)

[0022]

Since the present invention is as described above, even if the gap formed inside the drainage pavement layer is clogged with dirt and clogged, it can be removed by various machines as in the prior art. It can be easily removed by the action of static electricity without using equipment to recover drainage.

[0023] In addition, it is possible to prevent splashing of water due to water accumulated on the surface of the drainage pavement layer and vehicle accidents due to slippage on the road surface due to freezing.
Furthermore, the effect of preventing freezing can be further enhanced by mixing a salt or an aqueous salt solution into the aqueous solution of the aggregating agent and the surfactant.

Even when harmful substances are contained in dirt attached to roads and buildings, the harmful substances are aggregated and easily washed off with washing water, and harmful substances are separated and isolated from the washing water. Therefore, the danger to the human body due to harmful substances can be prevented.

[Brief description of the drawings]

FIG. 1 is a rear view showing an embodiment of the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG. 2;

FIG. 4 is a sectional view showing another state of the portion shown in FIG. 3;

FIG. 5 is an enlarged sectional view taken along line VV of FIG. 4;

FIG. 6 is a sectional view of another state of the portion of FIG. 5;

FIG. 7 is a sectional view of another state of the portion of FIG. 6;

8 is a cross-sectional view of the state of FIG. 4 in the state of FIG. 7 in the left half, and a cross-sectional view of another state in the right half.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Road 2 Drainable pavement layer 3 Aggregate 4 Salt (calcium chloride) 5 Dirt 6 Impermeable pavement layer 7 Granular aggregate 8 Void 9 Rain water 10 Gutter 11 Aggregate 12 Sewage

Claims (7)

(57) [Claims] 1. An aqueous solution of an aggregating agent for improving soil composed of a cationic organic polymer is attached to the surface of a drainable pavement, and the dirt adhering to the drainage pavement constitutes the dirt. By the Coulomb force generated between the particles and the particles constituting the aggregating agent, the particles slide along the surface of the drainable pavement road to be aggregated, and are separated by the sliding at that time. A method for preserving structures such as drainable paved roads. 2. An aqueous solution of a soil improving aggregate made of a cationic organic polymer is attached to the surface of a large number of granular aggregates constituting a drainage pavement layer on a drainable pavement road, and Dirt adhering to the surface, agglomerated by sliding along the surface of the drainage pavement layer by Coulomb force generated between particles constituting the dirt and particles constituting the aggregating agent, A method for preserving a structure such as a drainable pavement road, wherein the structure is separated by sliding at that time. 3. The method for preserving a structure such as a drainable pavement road according to claim 1, wherein the aqueous solution of the soil improving granulating agent comprising a cationic organic polymer contains salts. 4. An aqueous solution of a soil improving aggregating agent comprising a cationic organic polymer is adhered to the surface of a structure such as a road, and the dirt adhering to the surface of the structure is removed. The Coulomb force generated between the constituting particles and the particles constituting the aggregating agent slides along the surface of the structure such as the road to agglomerate, and the agglomerated dirt is washed with washing water. A method for preserving a structure such as a drainable pavement road, comprising removing dirt from the surface of the object and separating dirt from the washing water. 5. Cleaning water containing aggregated dirt containing environmentally harmful substances removed from the surface of a structure such as a road is pumped up by a pump and a vacuum truck, and the dirt is separated therefrom. The method for preserving a structure such as a drainable pavement road according to claim 4, wherein the remaining washing water is reused as washing water before removing the dirt. 6. Washing water containing aggregated dirt containing environmentally harmful substances removed from the surface of a structure such as a road is pumped up from the surface of the road by a pump and a vacuum truck. 5. The method for preserving a structure such as a drainable pavement road according to claim 4, wherein the dirt is separated and the remaining washing water is reused as the washing water before the dirt is removed. 7. Cleaning water containing aggregated dirt containing environmentally harmful substances removed from the surface of a structure such as a road is poured into a gutter of a road, and the cleaning water containing dirt in the gutter is removed. 5. The method according to claim 4, wherein the water is pumped up by a pump and a vacuum truck, and dirt is separated from the water, and the remaining washing water is reused as washing water before the dirt is removed.
The method for preserving structures such as drainable paved roads described in the above.