KR20110135166A - Repairing method of pavement sunken - Google Patents

Abstract

PURPOSE: A slump the maintaining method which can lift the sunk road by inserting grout material is provided to prevent environmental contamination by minimizing the outflow of the inserted grout material. CONSTITUTION: A slump the maintaining method is like next. An injection hole for injecting grout material to a frostbite prevention layer is punched. The grout material is injected to the punched injection hole in order to form the frostbite prevention layer. The inserted grout material is solidified. The grout material is injected between a lean concrete base layer and a concrete superficial layer through the injection hole in order to life the concrete superficial layer.

Description

Repair method for sinking roads {REPAIRING METHOD OF PAVEMENT SUNKEN}

The present invention relates to a method for repairing a settlement road, and more particularly, filling the grout material in the frostbite prevention layer of the settlement road, and then filling the grout material at a high pressure on the reinforced frostbite prevention layer is a pavement layer of the settled road The present invention relates to a method of repairing settlement roads to be raised.

In general, the concrete pavement structure is ground, and a forest prevention layer for compacting by laying a stone on the ground, a lean concrete base layer formed by placing concrete on the upper portion of the movable barrier layer and the lean concrete base is placed in concrete It consists of a concrete surface layer. In addition, a vinyl layer is further formed between the lean concrete base layer and the concrete surface layer so that the two layers are separated.

Such concrete pavement structure may cause road settlement due to poor compaction of the ground or frostbite prevention layer, loss of frostbite prevention layer, or settlement.

Conventionally, road repair has been performed by overlaying concrete on the concrete surface of the submerged portion as a method of repairing the subsidence, or by partially removing and repositioning the submerged road, but it is not a measure for the cause of subsidence. Repairs can be made in the unattended state, so road settling due to poor compaction can occur again.

In order to solve such disadvantages, there is a method of filling the grout material in the settled road layer so that the road is elevated by the filling pressure of the grout material.

For example, the road repair method of Korean Patent Publication No. 1995-0027099 (published on Oct. 16, 1995) proposes a method of raising concrete surface by filling grouting material between the frost-free layer and the ground or in contact with the frost-free layer. In addition, Japanese Patent Application Publication No. 2007-0074835 (published on July 18, 2007) reinforces the frostbite prevention layer by hardening the injected grout material by injecting a grout material into the frostbite prevention layer first, and penetrating the frostbite prevention layer through the second strengthening frostbite prevention layer. The method of filling the grout material with high pressure between the ground or reinforced frostbite prevention layer and the ground to raise the reinforced frostbite prevention layer and concrete surface layer together.

The above-mentioned cases compensate for the disadvantage that re-damage occurs in the overlapping method by filling the grout material in the concrete pavement layer to raise the submerged road, but finally, the grout material is used to raise the submerged road. The filling position is located under the in-phase prevention layer. This filling position requires that the grout material to be injected is also injected at a high pressure because the weight of the upper road layer is transferred as it is when the grout material is injected. As such, when the injection pressure of the grout material is increased, a large amount of grout material may leak into the gap between the road structure layers.

In other words, in order to elevate the submerged concrete surface, additional pressures higher than the pressure and the leakage pressure for actually elevating the upper road layer are added to the elevation of the submerged road, thereby lowering the construction efficiency.

In particular, since the grout material contains a large amount of cement, there is a problem that water pollution such as rivers or groundwater as well as soil pollution occurs when leaking.

Therefore, there is a need for a study on how to repair the road by injecting grout material while minimizing the environmental pollution.

Thus, the settlement method according to the present invention,

The purpose of the present invention is to provide a method of injecting grout material into a settled road so that the road is raised by the filled grout material and minimizing the injection pressure of the grout material.

It is another object of the present invention to provide a repair method that can prevent environmental pollution by minimizing the outflow of the injected grout material.

Settling road repair method of the present invention for solving the above problems,

In the method of repairing the settlement part of the road consisting of a ground, a frost-free layer by compaction, a lean concrete base layer placed on top of the frost-prevention layer, and a concrete surface layer on which concrete is poured on the lean concrete base layer, An injection hole forming step of drilling an injection hole for injecting the grout material; An in-phase preventing layer reinforcing step of reinforcing an in-phase preventing layer by injecting a grout material into the injection hole drilled in the injection hole forming step; Curing the grout material injected in the in-phase reinforcing layer reinforcing step; After the hardening of the grout material is completed, the road bumping step of injecting the grout material between the lean concrete base layer and the concrete surface layer through the injection hole to elevate the concrete surface upwards.

As described in detail above, the settlement method of the settlement of the present invention,

It is a repairing method to inject the grout material into the frostbite prevention layer of the settled road and strengthen it, and then to inject the grout material into the interface between the lean concrete base layer and the concrete surface layer on the frostbite prevention layer to raise the concrete surface layer. In this method, since the injection position of the grout material for the road bumps is located at the interface between the concrete surface layer and the lean concrete base layer, road bump repair work is possible even at a lower pressure than the conventional one, thereby reducing the construction cost.

In addition, it is possible to provide a useful invention that can prevent the environmental pollution to the soil and water quality by minimizing the leakage by lowering the injection pressure of the grout material.

1 is a process flow diagram of a repair method for settlement road according to the present invention.
Figure 2a to 2c is a cross-sectional view showing the repair process of the present invention.
Figure 3 is a flow chart of the process of repairing settlement road according to another embodiment of the present invention.
4a and 4b are a plan view and a cross-sectional view showing a maintenance process according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

1 is a process flow diagram of a repair method of a settlement road according to the present invention, Figures 2a to 2c is a construction sectional view showing the repair process of the present invention.

As shown, the road is ground (10), the frostbite prevention layer 20, which is laid with stone, lean concrete base layer 30 is placed on top of the frostbite prevention layer, and the concrete surface layer cast concrete on the lean concrete base layer It consists of 40.

After construction, the road may partially settle down due to various factors such as compaction of the frostbite prevention layer and soft ground or partial ground loss.

In order to repair the road where the settlement is made, a step of drilling the injection hole 50 to the in-phase preventing layer 20 is performed as shown in FIG. 2A. The injection hole is to reinforce the in-phase prevention layer so that the grout material can penetrate into the in-phase prevention layer to coagulate the in-phase prevention layer into one large mass so as to exert a bearing force against the pressure applied later. These injection holes may be drilled in plural along the inside or edge of the settled road.

In addition, the injection hole 50 may be perforated to the in-phase prevention layer interface between the in-phase prevention layer 20 and the lean concrete base layer 30 in addition to the shape to be perforated into the in-phase prevention layer. In the case of drilling into the in-phase preventing layer boundary surface, the grout material may be injected into the interface and penetrated into the ground by gravity, or the new support layer may be formed only of the grout material. In this case, when the perforation layer boundary surface is punctured, it is preferable to perforate to have a predetermined inclination angle with respect to the road surface. For example, the drilled injection hole 50 is coupled to the nozzle of the feeder for supplying the grout material to be described later, the in-phase that the high-pressure grout material discharged from the nozzle when the injection hole is drilled perpendicular to the road surface facing the nozzle Since the injection hits the vertical to the prevention layer perpendicularly there is a disadvantage that the discharge pressure is lowered. Therefore, the injection hole is drilled at a predetermined angle to contact the in-phase prevention layer at a predetermined angle when discharging the grout material, thereby minimizing the pressure drop during discharging so that the supply can be easily performed even at a low pressure.

When the drilling of the injection hole 50 is completed, an in-phase prevention layer reinforcing step of reinforcing the in-phase prevention layer is performed by injecting a grout material into the injection hole.

The in-phase reinforcing layer reinforcing step is a step for providing sufficient bearing capacity against the pressure applied in the road bumping step to be performed later. To perform this step, as shown in FIG. 2B, the injection nozzle of the grout material is introduced into the injection hole 50, and the grout material is supplied at a high pressure to allow the grout material to penetrate into the in-phase preventing layer to reinforce the in-phase preventing layer itself. , It may be injected into the interface between the in-phase prevention layer and the lean concrete base layer to form a separate reinforcement layer. At this time, the grout material may be applied to the interface between the frostbite prevention layer and the lean concrete base layer, and to allow the grout material to penetrate into the frostbite prevention layer by gravity.

As a material of the grout material, micro cement and ordinary cement are used. In addition, in order to infiltrate the grout material into the pores in the ground, it is preferable to increase and decrease the amount of water mixed in the grout material to increase fluidity and then supply the grout material.

Then, the injection pressure of the grout material is supplied in the range of 3 ~ 10 kgW / cm ² to facilitate the penetration into the in-phase prevention layer. The supply of grout material to the ground is not well performed when supplied at a pressure below the above range, and when the pressure is supplied above the above range, the ground reinforcement force is lowered due to a decrease in supply per unit area due to diffusion due to high pressure. Therefore, it is preferable to supply in the above range.

Next, the step of curing the grout material injected in the in-phase reinforcing layer strengthening step is performed. In this step, the injected grout material is allowed to harden sufficiently for 6 hours or more, preferably about one day, so that the bearing capacity for the load in the subsequent step is achieved. The curing time may be variously adjusted according to the mixing ratio of the grout material. For example, when using a special cement that hardens rapidly, it can provide the desired bearing capacity with a curing time of about 30 minutes, and when using ordinary cement mixed with a large amount of water, it has a curing time of more than one day so that the hardening of the grout material is sufficient. It is desirable to make it.

When the curing step is completed, a high-pressure injection of the grout material between the lean concrete base layer and the concrete surface layer through the injection hole is carried out to raise the concrete surface upward.

The step is a step of filling the grout material into the spaced portion between the lean concrete base layer and the concrete surface layer by injecting the grout material at high pressure into the injection hole drilled to reinforce the in-phase prevention layer as shown in Figure 2c. In order to perform this step, the injection hole filling operation may be further performed to block the injected grout material from flowing into the interface between the lean concrete base layer and the concrete surface layer after injecting the grout material in the in-phase reinforcing layer reinforcing step. At this time, the filling hole filling is made only on the lean concrete base layer so that the grout material which is injected for the subsequent uplift is easily injected into the interface between the lean concrete base layer and the concrete surface layer.

When the grout material is injected at a high pressure into the interface 31 between the lean concrete base layer and the concrete surface layer, the grout material layer 60 filled between the lean concrete base layer 30 and the concrete surface layer 40 is expanded due to the increased injection amount. The expansion force is pressurized by transferring the circumference of the grout material layer, the pressing force transmitted to the bottom is transferred to the reinforcing statue prevention layer 21 reinforced by the in-phase prevention layer reinforcing step so that the reinforcing statue preventing layer supports the expansion pressing force of the grout material layer. .

Therefore, the expansion of the grout material layer 60 proceeds to the upper concrete surface layer 40, the expansion of the concrete surface layer as the expansion force is greater than the load of the concrete surface layer is made. That is, the settled road is protruded when the expansion force of the grout material layer injected therein is greater than the load of the upper grout material layer. In the present invention, the grout material layer injected for the elevation only needs to bear the concrete surface load, thereby lowering the pressure. You can also up the road.

It is preferable to supply grout material injection pressure to raise such concrete surface within the range of 5-15 kgW / cm ² . Injecting the grout material below the above range does not facilitate the injection of the grout material, and injecting the grout material beyond the above range may cause breakage of the concrete surface layer by excessive injection. It is desirable to infuse the road uplift.

In addition, when the injection of the grout material for the road bumps is completed, a separate finishing treatment may be made to prevent the injected grout material from being discharged through the injection hole, and the road bumps are completed and have a predetermined time hardening time before the road passes. Let this be done.

In addition, the injection hole of the grout material for uplifting the road using the same injection hole as the previous injection hole for injecting the grout material for reinforcing the frostbite layer, or by separately drilling the injection hole is different from the frostbite layer reinforcement and road bumps It can be made through the injection hole.

On the other hand, when the road subsidence area is large, as shown in Figure 3, the auxiliary injection hole 51 perforated at a predetermined interval along the edge of the lower portion before the road bumping step on the interface between the lean concrete base layer and the concrete surface layer The injection hole forming step and the grout material is injected and cured through the auxiliary injection hole to fill the edge 70 of the road subsidence with the grout material so that the grout material injected into the interior at the step of the step of the road flows out along the boundary surface. The sealing step may be further preceded by a sealing step.

As shown in the plan view of FIG. 4A and the enlarged cross-sectional view of the main part of FIG. 4B, the auxiliary injection hole forming step is the same as the injection hole forming step with the boundary surface 31 between the lean concrete base layer 30 and the concrete surface layer 40. The auxiliary injection hole is formed to have an inclination angle. The auxiliary injection hole 51 is preferably formed to be inclined outward from the inside of the settled portion so that the end of the auxiliary injection hole is located close to the edge of the settled portion. In addition, in the present invention, the auxiliary injection hole forming step and the injection hole forming step are described in detail above, but a plurality of perforations are made in the submerged portion, and the injection holes drilled at the edges are used as auxiliary injection holes for sealing. The injection hole used in the inner side may be formed in one step such as to be used as an injection hole for raising the road.

When the grout material is injected into the formed auxiliary injection hole 51, the injected grout material is amplified by a predetermined amount along the interface with respect to the auxiliary injection hole. At this time, the injection amount overlaps with the grout material injected into another adjacent injection hole, and finally, the sealing edge 511 is formed so that the boundary edge of the lean concrete base layer and the concrete surface layer of the settled part is filled with the grout material. It was made possible.

The sealing band 511 prevents the grout material injected into the injection hole for the road bumping from expanding indefinitely along the interface between the lean concrete base layer and the concrete surface layer, thereby preventing a drop in the pressure being injected to facilitate the road bumping. It is suitable for repairing a wide area such as immersion.

10: Ground 20: Frostbite prevention layer
21: reinforced frostbite prevention layer 30: lean concrete base layer
31: interface 40: concrete surface
50: injection hole 51: auxiliary injection hole
60: grout layer 70: settlement portion edge
511: sealing strip

Claims (3)

Ground 10, a frost-free layer 20 by compaction, the lean concrete base layer 30 is placed on the upper frost-prevention layer, and the concrete surface layer 40 on which concrete is poured on the lean concrete base layer In the method of repairing the settlement,
An injection hole forming step of drilling the injection hole 50 for injecting the grout material into the in-phase preventing layer 20;
An in-phase preventing layer reinforcing step of reinforcing an in-phase preventing layer by injecting a grout material into the injection hole drilled in the injection hole forming step;
Curing the grout material injected in the in-phase reinforcing layer reinforcing step;
After the hardening of the grout material is completed, the step of injecting the grout material between the lean concrete base layer and the concrete surface layer through the injection hole 50 to raise the concrete surface upwards; . The method of claim 1,
The grout material injection pressure in the in-phase reinforcing layer reinforcement step is 3 ~ 10 kgW / cm ² ,
The grout material injection pressure at the road uplift stage is 5 ~ 15 kgW / cm ² Repair method for settlement. The method of claim 1,
Before the road bumping step
An auxiliary injection hole forming step of drilling a plurality of auxiliary injection holes 51 at predetermined intervals at an interface 31 between the lean concrete base layer and the concrete surface layer along the edge of the settlement portion;
The grout material is injected and cured through the auxiliary injection hole to fill the edge between the lean concrete base layer and the concrete surface layer of the road subsidence with the grout material to prevent the grout material injected into the interior at the step of the road uplift to flow out along the boundary surface. Sealing step; to the settlement method characterized in that the further performed.

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