WO2003050359A1

WO2003050359A1 - Method of repairing and manhole and paving therearound, and device used for the method

Info

Publication number: WO2003050359A1
Application number: PCT/JP2001/010785
Authority: WO
Inventors: Ichiro Fukiya; Masaru Murase; Mikio Watanabe; Yuji Nanbu
Original assignee: Hanex Co., Ltd.
Priority date: 2001-12-10
Filing date: 2001-12-10
Publication date: 2003-06-19

Abstract

A method of repairing manhole and paving therearound capable of silently removing asphalt pavement around a manhole by using a simple device without using a mechanical cutter such as a hole saw, comprising the steps of heating the asphalt pavement around the manhole by a far infrared radiation heater installed in a casing to fuse the asphalt pavement, separating the asphalt pavement into binder and aggregate for removal, disconnecting a fixing bolt from a manhole cover support frame, inserting a pull-up claw into the manhole cover support frame, operating a jack to raise the manhole for removal, fixedly installing a new cover support frame so as to fit to the gradient of a road surface, and filling the pavement material around the manhole cover support frame and rolling the paved material, whereby, since the blade of the casing is bitten into the fused pavement surface and forms a compartment line, the asphalt pavement around the manhole can be neatly removed along the compartment line and, since the mechanical cutter is not used, the manhole can be repaired silently, and a night work is allowed even in a residential district.

Description

Description Manhole repair method and pavement method and equipment used for the method

The present invention relates to a method for repairing a manhole, a method for paving a new pavement including a manhole, and a method for replacing an existing pavement, and a heating-type repair device used in these methods. Background art

Manholes installed on paved roads to inspect underground water and sewage pipes, gas pipes, and power and communication facilities underground work will cause the surrounding pavement to sink due to the traffic load, causing a level difference and smooth traffic. Need to be repaired. Conventionally, when repairing and restoring, the pavement around the buried road occupation was cut or crushed and removed with a cutter or breaker.However, due to noise problems, work on residential land at night Was difficult.

As a method that allows this work to be carried out quickly and while ensuring traffic and construction safety, the pavement around the manhole is cut into a circle, the manhole cover frame and the surrounding pavement plate are lifted up to the top and removed. For restoration, there is a method that allows early opening of traffic by using epoxy resin resin concrete and quick-setting concrete.

The hole saw, which is a cylindrical power tool mainly used in this method, consists of a cylindrical body and a diamond tip attached to the tip. When cutting, cooling water is required to cool the diamond tip and discharge grinding chips. Therefore, a tank for supplying cooling water was required. In addition, the cooling water flows down the pavement surface together with the cuttings, contaminating the surrounding environment, and cleaning was troublesome. Furthermore, since a hole saw type cutter cuts pavement by grinding, it is necessary to press the cutter against an object to be cut, and therefore, a hydraulic unit for pressurizing the cutter-equipped vehicle was required.

The cut surface of the pavement with diamond chips becomes a smooth surface by cutting the aggregate, but since it is a smooth surface, it is not sufficiently integrated with the above-mentioned repair concrete for repair, and the boundary between the new and old pavement is It is weak against shear stress, and it may collapse, steps, and cracks after restoration.To improve the integrity of old and new pavements, dry the cut surface of the pavement with a burner, apply primer, and apply a primer to the resin concrete. Work was needed to enhance integration.

Furthermore, when the outside air temperature was low, the cast resin concrete was cured with warm air to open the traffic early, so it was necessary to prepare a hot air generator such as a jet heater.

Also, insert a lifting claw between the manhole cover frame and the slope of the manhole, apply a reaction force to the circular frame installed on the pavement surface, and apply a force to lift the manhole cover frame with a manual jack. There is also a method to remove the pavement and the manhole cover at the same time.

In this method, the pavement is peeled off with the power of a jack, so that the surrounding pavement may be turned up or lifted up. This requires an extra step of shaping the cut surface.

Since the road surface has crossing and vertical slopes, the entire lower surface of the frame does not touch the pavement surface, and there is a part that rises up, the equipment is not stable, and work cannot be performed smoothly. In some cases, the jack had to be individually operated and adjusted in order to raise the manhole cover receiving frame evenly, which required laborious work.

In new pavement work including manholes and repair work on existing pavements, the manhole cover frame projecting from the base layer cuts the continuity of pavement work, reducing the work efficiency. It was not possible to use a rolling machine such as a load roller to compact the area near the manhole, and had to use a hand-held compactor to compact the compaction. In addition, since the manhole cover frame is installed before paving, it is difficult to match the manhole cover frame with the vertical and transverse gradients of the road, and there may be steps.

Therefore, the manhole opening is closed with a temporary lid, and the pavement is continuously paved over the opening in the same way as other road sections. A method was developed to expose the road and install the manhole cover frame to match the vertical and cross slopes of the road surface. After completion of pavement work, the manhole cover frame will be installed according to the road surface, and the procedure will be the reverse of the conventional method.

Therefore, the pavement could be constructed continuously as if there were no manhole, which improved the efficiency of the work and eliminated the insufficient compaction around the manhole.

In this method, overlay pavement and new pavement were cut and removed by crushing with a breaker, cutting a square around the manhole with a cutter, or cutting a circle around the manhole with a cylindrical cutter. There were similar problems as mentioned in the manhole repair.

Furthermore, the manhole cover frame for communication lines such as prefabricated manholes and telephones used for sewerage is fixed to the upper part of the manhole with bolts, and the pavement was cut or sheared around the manhole. Can not remove the lid receiving frame alone, break the pavement with a breaker to expose the bolts, and release the fixing.However, even if the pavement cutting is reduced in noise, the noise of the breaking force is lower than that of the low noise method. The effect was halved.

In order to avoid noise caused by the breaker, it has been proposed to remove the pavement of the bolts with a core boring device, expose the bolts, remove the nuts, and release the fixing of the manhole cover receiving frame. Bolt positions must be searched according to the manufacturer and type, for example, the arrangement of bolts is different, and the number of bolts is different between the sewer manhole and the communication line manhole. Since the power bolt was covered with pavement, it was difficult to identify its position easily. In addition, the pavement had to be removed by the core boring equipment by the number of bolts, which was troublesome.

Therefore, an object of the present invention is to remove pavement and remove bolts without the need for a large-scale cutting device such as a hole saw, and without searching for bolt positions or exposing bolts individually to release fixing of manhole cover receiving frames. The exposure work can be performed in one step.

In addition, pavement repair materials must be filled around the manholes.However, asphalt mixture, which is a pavement material for roads, is generally manufactured in a plant and heated at 140 to 200 ° C. However, for repair of manholes such as water and sewage systems, installation of electric poles, or repair of small-scale pavement due to the repairs, the production volume of one batch of plant is too large, and Since it could not be used at any of the locations, the method of transporting to multiple manhole repair locations sequentially was adopted. However, asphalt mixture that has cooled and solidified because it could not be used cannot be used as it is and requires special treatment, so it was often discarded.

An object of the present invention is to provide a repaired pavement heating device capable of repairing pavement in a small area. Disclosure of the invention

The present invention comprises the steps of heating and melting the asphalt pavement around the manhole or directly above the manhole by a heating device such as a far-infrared heater, removing the asphalt that has been melted, and removing the manhole cover receiving frame. The construction is carried out without using a cutting device and without noise, and these processes are carried out by one device to enhance the construction efficiency.

The heating and removing apparatus of the present invention can simultaneously heat and melt the surrounding pavement and expose the bolts that fix the manhole cover receiving frame, and can reduce the number of workers because it requires fewer workers. It will be possible to construct at low cost.

If the asphalt pavement is heated using an open flame such as a gas burner when the asphalt pavement is heated, the asphalt is carbonized by the flame, and it is difficult to control the irradiation range of the flame. Since the asphalt pavement outside the removal area is also heated, adverse effects such as the expansion of the degraded area of the pavement remain. Therefore, the surrounding asphalt pavement is not degraded by heating, and the pavement material separated into the aggregate and the aggregate can be reused.

Furthermore, unlike the cutting of pavement with a cutter, the binder and aggregate are released, and the aggregate is not cut, but retains its original shape. At the time of restoration, the newly filled pavement material is filled into the recesses and becomes in a state of interfacing with the existing pavement, so the connection between the old and new pavement is strong, and the occurrence of settlement cracks at the boundary surface is prevented Is done. The asphalt pavement is heated not only from the pavement surface but also from the inside of the manhole cover frame, so asphalt pavement is also melted from the inside of the pavement, making it even and efficient. In addition, asphalt firmly adhered to the manhole cover frame can be easily peeled and removed.

Furthermore, it is possible to heat and cure using the heating device of the heating and removing device used when removing the pavement restoration material, and to open up traffic early without preparing a hot air heating device such as a jet heater. Becomes possible.

In addition, asphalt mixture used for repairing small areas of pavement around manholes can be heated and used on site at the required amount. BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 is a front view of the heating removal equipment.

Figure 2 is a front view of the heat removal equipment installed in a manhole. Fig. 3 is an explanatory diagram of the use state of the heat removal device.

FIG. 4 is an embodiment of a breaking claw enlarging mechanism.

FIG. 5 shows another embodiment of the breaking claw enlarging mechanism.

Fig. 6 is an enlarged view of the fixed part of the manhole cover receiving frame.

Fig. 7 is a process diagram of the new pavement construction work.

Fig. 8 is a process diagram of the cutting overlay paving work.

Figure 9 shows the overlay pavement construction process.

Fig. 10 is a process diagram of pavement replacement work.

Fig. 11 is a front sectional view of a pavement heating device.

FIG. 12 is a side sectional view of a pavement heating device. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described based on embodiments shown in the drawings.

As shown in FIG. 1, the heating and removing device has a center axis 20 provided at the center of a frame 2 and penetrates a casing 1. The casing 1 is vertically movably attached to the frame 2 via a lifting cylinder 21. The frame cylinder 23 is attached to the pillars 22 at the four corners of the frame 2, and the pillars 22 expand and contract.

The inner surface of the side wall of the casing 1 is lined with a material that reflects far-infrared rays. Teeth are formed at the lower end, and as it rotates, it penetrates the melted asphalt pavement surface.

Rotational force is transmitted to the casing 1 from the hydraulic motor 3 via gears, and the casing 1 rotates around the central axis 20. The center shaft 20 extends downward, and as shown in FIG. 2, the tip 24 is fitted and fixed in the recess of the centering device 31 provided in the manhole, so that the rotation of the casing 1 is achieved. There is no blurring.

On the ceiling of the casing 1, a heat insulating material 10 and a reflecting plate 11 are fixedly provided on a central axis 20. A far-infrared heater 5 as a heating means is provided concentrically and screwed below the reflecting plate 11. They are arranged in a spiral or grid pattern. The far-infrared heater 5 is independent of the casing 1 without rotating.

The air inside the casing 1 is sucked, and the odor and smoke emitted from the heated asphalt are purified by the air purifier 6 and released to the atmosphere.

A lower beam 25 is provided at a lower portion of the frame 2, and a caster 7 and a driving wheel 8 are provided on the lower beam 25. The repair device can move by itself.

The frame 2 is provided with telescopic legs 26 which are telescopically extended by a mechanical or hydraulic cylinder. After moving the frame 2 to the repair location, extend the telescopic legs 26 as shown in Fig. 2, and move the casters 7 and drive wheels 8 off the road surface to prevent the frame 2 from moving.

A breaking claw 4 is provided near the tip of the central axis 20. As shown in FIG. 3, the breaking claw 4 is capable of expanding and contracting in the lateral direction, and is pushed into and removed from the lower side of the manhole cover receiving frame. If the expansion and contraction mechanism of the breaking claw 4 is hydraulically driven, the inside of the casing will be heated to a high temperature, which may affect the hydraulic piping. And

In the example shown in FIG. 4, the cone-shaped tapered body 42 fixed to the tip of the operating rod 41 is pulled up, thereby pushing the reverse tapered body 43 disposed around the tapered body 42 outwardly, and breaking the claw. 4 is extended outward.

The example in FIG. 5 utilizes a pantograph 44, in which the pantograph 44 is expanded outward by pushing down the operating rod 41, and the breaking claw 4 is extended outward.

In addition, the up and down movement of the operating rod may be made to extend the breaking claw in the lateral direction by the rack gear.

Next, the case of repairing manholes using this heat removal equipment will be described.

As shown in Fig. 2, the heating removal equipment is located above the manhole, Extend the telescopic legs 26 in accordance with, adjust the frame 2 so that it is perpendicular to the manhole, operate the frame cylinder 23 to reduce the frame 2, and set the centering device 3 1 installed on the manhole. The tip 24 of the central shaft 20 is fitted into the concave portion. Activate the lifting cylinder 21 and lower the casing 1 until it comes into contact with the road surface, as shown in Fig. 3, and install it around the manhole. Energization of the far-infrared heater 5 is started, and the asphalt pavement around the manhole is heated and melted from the surface and inside the manhole cover receiving frame.

The air in the casing is guided to an air purification device to purify the air by deodorizing it, etc., and is released to the atmosphere. Heating prevents volatile components of asphalt from dispersing to the surroundings as pale blue smoke, resulting in a bad smell.

When the asphalt is softened and the asphalt and the aggregate can be easily separated, the casing 1 is rotated by the hydraulic motor 3 and the tip blade is cut into the road surface to form a circular lane marking on the road surface .

When the asphalt pavement has been melted so that it can be easily extracted from the surface, the casing 1 is pulled up, the telescopic legs 26 are retracted and stored, and the casters 7 and the driving wheels 8 are brought into contact with the road surface to support the frame. And move the repair equipment out of the manhole.

Pull out the asphalt around the melted manhole with a scoop or the like, expose the bolts 53 fixing the manhole cover receiving frame 54 as shown in Fig. 6, and loosen the nut 52 to release the fixing. . This operation is not required if the manhole cover frame is not fixed with bolts.

After releasing the fixing nut 52, set the heating removal device on the manhole again, and adjust the frame 2 so that the breaking claw 4 at the tip of the center axis 20 is located on the lower surface of the manhole cover receiving frame. Extend the breaking claw 4 in the horizontal direction, insert it between the manhole cover receiving frame and the sloping wall, and operate the frame cylinder 23 to lift and remove the manhole cover receiving frame. Clean the removed part, adjust the height of the new manhole cover for replacement to fit the pavement surface, fill the repair material around the manhole cover, and roll it. If the repair material is asphalt mixture, use the repair material heating device shown in Fig. 11 and Fig. 12 to heat asphalt mixture sufficient to pave a small area around the manhole. Fill.

The repair material heating device main body is a box 71. The side wall 7 1 0 and the bottom 7 1 1 of the box 7 1 are of a double structure, and the heat insulating plate is attached to the plates that make up the inner and outer walls, and the space is insulated with glass wool or rock wool. Material 7 1 2 is filled. As shown in Fig. 12, the inner bottom part 7 13 of the box 71 is formed on a slope that is gently inclined from both walls toward the center, and the center part is a groove-shaped screw conveyor 7. 2 are arranged. A space 73 is provided below the inclined surface of the bottom surface, and a heating source 74 such as a far-infrared heater or an electric heater is attached.

The screw conveyor 7 2 is rotatably supported on both side end walls of the box body 7 1, and a discharge port 7 14 for asphalt mixture is provided on the side end wall in the direction of being sent out by the screw conveyor 7 2. There is an inclined outlet 715 at the outlet 7 14.

On the upper surface of the box 71, a double-sided lid 75 having a double structure like the box and filled with a heat insulating material is provided. On the inner surface of the lid 75, a far-infrared heater as a heating source 74 is provided. A stainless steel or ceramic protective net 7400 is provided in front of the far infrared heater. A groove is provided in the inner surface around the lid 75 and is filled with a silicone rubber sealing material. When the lid 75 is closed, the box body 71 is sealed. Also, if necessary, a heat-insulating window for observing the interior will be provided. The bottom space 73 of the box 71 is provided with a cartridge type deodorizing device 76 filled with a porous adsorbent such as zeolite. The air inside the box 7 1 is sucked by the suction blower 1 760 and circulated through the circulation line 760 1, while the deodorizing device 760 removes the foul odor due to the volatile components of the asphalt released at high temperatures. And during heating, Or, do not adversely affect the surroundings when the lid 75 is opened.

At the site, the heating device is mounted on a gantry and used at a height that makes it easy to work. The far-infrared heater is energized to preheat the inside of the box 71 to 120 to 160 ° C, and the block or bagged asphalt mixture is stored in the heating device. The lid 75 is opened and put in, and the screw conveyor 72 is rotated to heat and stir the asphalt mixture, loosen the lump, and heat it to a state where it can be paved. In the production of asphalt mixes, additives for preventing caking may be added as appropriate to prevent asphalt from caking.

After confirming that the asphalt mixture has risen to the workable temperature and has been unraveled, defeat the chute 715 and take out the asphalt mixture from the box and use it for repair.

The heating device has a temperature measuring unit (not shown) inside the box, and a temperature signal from the temperature measuring unit is fed back to the control unit to automatically heat the asphalt mixture to a predetermined temperature and automatically maintain the predetermined temperature. I can do it.

The asphalt mixture to be heated is not particularly limited, and can be used for any asphalt mixture.

Next, pavement including manholes using the heat removal equipment will be described.

(1) New construction

As shown in Fig. 7 (a), when newly paving the road on which the manhole is installed, a temporary lid 62 having a slip stopper on the lower surface is installed at the manhole opening and closed. Since the manhole cover receiving frame is not installed, the base layer and the surface layer are paved on the entire pavement surface including the temporary cover 62 by the usual method. The new pavement 6 4 constructed on the temporary lid 62 is to be removed when the manhole cover receiving frame 54 is installed, so the pavement material adheres to the surface of the temporary lid 62 to remove it. A release agent is applied or a release paper is attached so as not to take time, so that cleaning is easy and the temporary lid 62 is easy to reuse. Alternatively, use a temporary lid that has heat resistance and does not easily adhere to asphalt. In addition, since the manhole is covered with pavement 64 and its position cannot be determined, the distances from the multiple reference points on the side of the road to the center of the manhole are measured, and after the pavement is completed, the center of the manhole is located from the reference point. The center position and the shape of the manhole opening should be marked on the pavement surface with paint.

After the completion of the pavement, the heating removal equipment shown in Fig. 1 will be positioned and installed according to the mark drawn on the pavement surface.

The far-infrared heater located inside the casing 1 is energized to heat and melt the asphalt pavement to separate it into binder and aggregate. When pressure is applied to the casing, or when the casing is rotated or swung, the casing cuts into the surface of the pavement 64, and the area where the pavement should be removed can be clearly defined.

Remove the separated aggregate and binder as shown in Fig. 7 (b). The section of the section to be removed is tapered, and the joining surface between the pavement repair material and the existing pavement is inclined to enhance the integrity of the repair material and the existing pavement. To prevent.

The casing cuts into the road surface to a minimum of 1-2 cm, and the pavement is removed diagonally using a vibration-type crusher equipped with a flat blade using the groove-shaped dividing line formed on the road surface. You can.

When the temporary lid 62 is sufficiently heated, the asphalt pavement material that has adhered is separated into aggregates and binders and can be easily removed, so that there is no need to apply a release agent on the upper surface of the temporary lid.

When all the paving material around the manhole has been removed, the temporary lid 62 is removed from the manhole.

As shown in Fig. 7 (c), a concrete adjusting ring 56 for adjusting the height of the manhole cover receiving frame 54 is installed on the manhole sloping wall 55, and the manhole cover is finely adjusted with an adjusting mortar. Receiving frames 54 shall be installed in accordance with the vertical and cross slopes of the pavement surface. As shown in Fig. 7 (d), a pavement repair material 641, such as resin concrete, is poured around the manhole cover receiving frame 54, filled, and compacted with a compacting machine having an arc-shaped compacting plate. 6 Become one with 4.

If necessary, use the far-infrared heater of the heating and removing equipment to heat and cure the pavement repair material 6 41 that has been cast and filled.

(2) Cutting overlay work

The manhole cover is removed, and the manhole cover receiving frame 54 is removed using the heat removal device shown in Fig. 1 or other means.

As shown in Fig. 8 (a), the opening of the manhole is closed with a temporary lid 62, crushed stone is poured in, and temporary paving is performed to make it the same level as the existing pavement 64. The temporary pavement on the surface layer and manholes is cut and removed.

As shown in Fig. 8 (b), overlay 644 is paved on the cut surface of existing pavement 64. Since the manhole is covered with the overlay 6 4 3 and the position cannot be determined, measure the distance from the reference point on the side of the road to the center of the manhole, and after the completion of the pavement paving, place the manhole on the pavement surface. Draw the center position or a circular mark with paint. At this point, it is possible to open the traffic once.

As shown in Fig. 8 (c), as in the case where the manhole cover receiving frame was first removed, a heating removal device was installed on the mark drawn on the pavement surface, and the asphalt pavement was heated and melted to bind the binder and aggregate. A concrete adjustment ring 56 for adjusting the height of the manhole cover receiving frame is installed on the manhole slope wall 55, and fine adjustment is made with an adjusting mortar to overlay the manhole cover receiving frame 54. So that it is at the same level as the surface.

As shown in Fig. 8 (d), a pavement repair material 641, such as resin concrete, is poured around the manhole cover receiving frame 54, filled, and compacted with a compactor having an arc-shaped compacting plate. 6 Become one with 4. (3) Overlay paving work

As shown in Fig. 9 (a), a release agent is applied so that asphalt pavement material does not adhere to the surface of the manhole cover, or a circular release sheet is attached, and the manhole cover is also attached to the existing pavement 64 surface. Pave overlay 6 4 3 including. If the pavement is sufficiently heated and melted to the surface of the manhole cover, the asphalt can be easily peeled off, and no stripping agent is required.

Since the manhole will be covered with the overlay, draw a mark on the surface of the overlay with paint or the like so that its position can be identified. The overlay has been completed, including the top of the manhole, so it is possible to open the traffic at this point. As shown in Fig. 9 (b), the manhole cover receiving frame 54 is once removed by an appropriate method.

As shown in Fig. 9 (c), a concrete adjustment ring 56 for adjusting the height of the manhole cover receiving frame 54 is installed on the manhole sloping wall 55, and the height is finely adjusted with an adjustment mortar. To make the manhole cover receiving frame 5 4 the same level as the surface of the overlay 6 4 3.

As shown in Fig. 9 (d), the pavement repair material 641, such as resin concrete, is poured around the manhole cover receiving frame 54, filled and then compacted with a compacting machine having an arc-shaped compacting plate. 6 Integrate with 4.

(4) Pavement replacement work

As shown in Fig. 10 (a), the manhole cover frame is removed by appropriate means, and the pavement is removed. After that, as shown in Fig. 10 (b), temporary lid 62 is installed at the manhole opening and closed, and pavement replacement work is performed normally. The subsequent steps are the same as the new pavement construction.

As shown in Fig. 10 (c), a concrete adjusting ring 56 for adjusting the height of the manhole cover receiving frame 54 is installed on the manhole sloping wall 55, and the manhole is finely adjusted with an adjusting mortar. Fit the lid receiving frame 5 4 to the pavement 6 4 And set it up.

As shown in Fig. 10 (d), the surrounding area of the manhole cover receiving frame 54 is filled with a pavement repair material 641, such as resin concrete, and is compacted by a compactor having a circular compacting plate. The pavement of 6 is to be integrated with 4.

According to the pavement method of the present invention, the asphalt pavement is heated to separate the aggregate and the binder instead of cutting the pavement when a new pavement is constructed or an existing pavement is replaced. This can be performed very easily and efficiently without being hindered by the manhole cover receiving frame, and the upper surface of the manhole cover receiving frame and the pavement surface can be easily matched. Industrial applicability

According to the present invention, the asphalt pavement surrounding the manhole can be heated and melted and the manhole cover receiving frame can be removed with one apparatus, and the manhole can be repaired efficiently.

The telescopic legs were adjusted to match the unevenness and inclination of the road where the manhole was installed, so that the frame could be installed perpendicular to the manhole.

Furthermore, since the odor generated in the casing due to the heating of the asphalt pavement is cleaned by an air purifier and released to the atmosphere, the odor and smoke at the construction site can be eliminated. As described above, according to the manhole repair method of the present invention, the asphalt pavement is melted by non-flame heating, so that the repair can be performed with low noise without cutting around the manhole cover receiving frame.

When the manhole cover frame is fixed with bolts, it is not necessary to search for the position of the bolts, and the construction is easy and can be performed at low cost.

Since non-flame heating is used for asphalt pavement heating, unnecessary areas are not heated, only the areas to be removed can be limitedly heated, and asphalt pavements in areas not to be removed are heated and deteriorated. I will not let you. The asphalt pavement is non-flame heated to melt the binder so that the aggregate can be easily removed.In addition, the casing is pressed into the pavement and the surface layer is sectioned with a blade, so that the boundary of the removed part does not become jagged. It does not require border shaping and has a beautiful finish.

Since the binder and the aggregate are separated by heating, the aggregate can be reused, and the concave portion of the aggregate is formed in the removed cross section, so that the bond with the restoration material is strengthened.

In addition, since the heating device of the repair device can be used for heating and curing the restoration material, there is no need to prepare a separate heating device for curing the restoration pavement, and the number of devices in the entire system can be reduced. .

According to the heating device of the present invention, only the required amount is heated on-site, so that it is possible to cope with small-scale repair work, and to produce cold asphalt mixture that had to be discarded in the past. No more.

Claims

The scope of the claims

1. When replacing the manhole cover receiving frame, the asphalt pavement around the cover receiving frame is melted by a far-infrared heating device, a blade is inserted into the lower part of the cover receiving frame, and the cover receiving frame and the surrounding pavement are pulled up integrally to cover the cover receiving frame. A manhole repair method that removes the cover, installs and fixes the height of the lid receiving frame to the surrounding road surface, and fills the area around the lid receiving frame with pavement restoration material.

2. The method of claim 1, wherein the restoration material is either asphalt or cement concrete.

3. In claim 2, the recovery material asphalt is block or bagged, and it is reheated in a heating box that uses a far-infrared heat source with a mixing and discharging device at the bottom and a discharging port at the side. A manhole repair method that melts and fills.

4. In claim 2, the asphalt is re-melted from the removed pavement asphalt in a heating box that has a mixing and discharging device at the bottom and a far-infrared radiation source with a discharging port on the side, and is used for recovery. Manhole repair method.

5. The method for repairing manholes according to claim 2, wherein the cement concrete is an early-strength, high-flow concrete, and an inner form is poured into an inner surface of the manhole to be poured.

6. On the pavement of the road where the manhole is located, measure the center position of the manhole in advance, close the manhole opening, cover the manhole and pave continuously, determine the manhole position on the paved surface, and Heating and melting the pavement, removing the pavement, exposing the manhole, and installing a manhole cover frame.

7. On the cutting overlay pavement of the road where the manhole exists, remove the existing manhole cover frame, close the manhole opening, cut the existing pavement road surface, and cover the manhole on the cutting surface continuously and integrally. The overlay pavement is constructed, the manhole position is determined on the overlay pavement surface, the overlay pavement above the manhole is heated and melted and removed to expose the manhole, and the manhole cover receiving frame is installed. Mounting method.

8. On the overlay pavement of the road where the manhole is located, measure the center of the manhole in advance, cover the manhole cover, construct the overlay pavement continuously and integrally, and heat and melt the overlay pavement at the top of the manhole. An overlay pavement method that removes the pavement to expose the manhole and raises the manhole cover frame.

9. On the replacement pavement of the road where the manhole exists, remove the existing manhole cover frame, measure the center position of the manhole in advance, close the manhole opening, cover the manhole, and pave continuously and integrally. A pavement method that determines the position of the manhole on the pavement surface, heats and melts the pavement above the manhole, removes the pavement, exposes the manhole, and installs a manhole cover frame.

10. The pavement method according to any one of claims 6 to 9, wherein the heating means is infrared rays or far infrared rays.

1 1. A casing having a blade at the tip is vertically movably attached to the frame, and the manhole cover receiving frame is lifted by applying a reaction force to the outer peripheral edge of the casing, the heating device arranged inside the casing, and the casing. Manhole repair device consisting of a lifting device.

12. The manhole repair device according to claim 11, wherein the casing is capable of vibrating, swinging, or rotating.

13. The manhole repair device according to claim 11 or 12, wherein the heater is built into the tip blade of the casing.

14. The manhole repair device according to any one of claims 11 to 13, wherein a pillar of the frame is extendable.

15. A manhole repair device according to any one of claims 11 to 14, wherein the frame includes a self-propelled device.

16. The manhole repair device according to any one of claims 11 to 15, wherein the frame is provided with extensible fixing legs.

1 7. The manhole repairing device according to any one of claims 11 to 16, wherein a breaking claw mechanically expandable and contractable in a lateral direction is incorporated below the central axis passing through the casing.

1 8. A manhole repair device according to any one of claims 11 to 17, further comprising a device for purifying air in the casing.

1 9. A repair pavement heating device equipped with a mixing / discharging device at the bottom of the box, a discharge port at the side end, and a heating source at the lid.

20. The repair pavement material according to claim 19, wherein the discharging device is a screw conveyor.

2 1. The repaired pavement heating device according to claim 19 or 20, wherein a heating source is provided at the bottom of the box.

22. The repaired pavement heating device according to any one of claims 19 to 21, wherein the heating source is a far-infrared heater.

23. The repair paving material heating device according to any one of claims 19 to 22, wherein the air in the box is circulated through a deodorizing device.