TWI691632B - Longitudinal trench forming equipment for paving, paving construction method and construction evaluation method of asphalt paving - Google Patents

Abstract

Provide a vertical trench formation technology that is easy to construct.

The longitudinal groove forming tool 11 is provided on the road leveler 7, 8 under the bottom plate. The longitudinal groove forming tool 11 is composed of a plurality of beam members 12. The beam members 12 are arranged in parallel and in series (the first beam member 12A and the second beam member 12B) with the traveling direction of the road leveler as the axial direction. When smoothing the paved road surface, the beam member 12 is pressed by the smoothing plane, and moves in the smoothing direction in the state of being pressed to form the longitudinal groove 20. In particular, the attachment and detachment of the second beam member 12B system is easy.

Description

Longitudinal trench forming equipment for paving, paving construction method and construction evaluation method of asphalt paving

The present invention relates to a paving technology, and particularly to a paving with longitudinal grooves.

In trenching and paving, it is common to set a trench system with a width of 6 to 9 mm and a depth of 4 to 6 mm at intervals of 40 to 60 mm. In trenching and paving, there are a vertical type (longitudinal groove) provided along the traveling direction of the vehicle and a horizontal type (lateral groove) provided in the crossing direction.

Longitudinal ditching is mainly used on curved roads that need to increase the lateral sliding resistance. The horizontal ditching system has an excellent effect mainly in shortening the braking distance of the vehicle, and is used in front of a ramp or intersection. In addition, the horizontal type ditching system uses the sound and vibration generated during driving to generate a signal to the driver, or doze driving, speeding and other warnings.

In addition to increasing the sliding resistance, it also promotes drainage, makes the road quickly dry, and prevents slipping in rain. In particular, it exerts the effect of suppressing water drift.

Furthermore, in cold regions, not only the anti-skid effect becomes significant, but also the effects of freezing prevention, snow accumulation prevention, and snow melting. Groove paving is because the pavement becomes uneven, the surface area increases, and the groove space is formed, so heat is stored, and the temperature of the pavement becomes higher than that of ordinary paving. In addition, when a chemical such as calcium chloride as an antifreeze agent is spread, a part of the chemical remains in the ditch even when the vehicle passes, so the snow-melting effect continues. In addition, even if the water on the road surface freezes and a frozen road surface occurs, the effect of promoting the wear of the frozen road surface (black ice burn) is exerted by contact with the tire of the passing vehicle.

【Advanced Patent Literature】 【Patent Literature】

[Patent Document 1] Japanese Patent Laid-Open No. 2001-355203

[Patent Document 2] Japanese Patent Laid-Open No. 2002-206203

The trenching method of asphalt paving is the mainstream through special machinery cutting. After the construction is carried out in the same way as general paving, the cutting step is performed. Therefore, compared with general road paving, there is a problem that the construction cost becomes more expensive and the construction period becomes longer.

Furthermore, a dust treatment step is required in the cutting step, and at this point, there is a problem that the construction cost becomes expensive and the construction period becomes long.

On the other hand, one of the trenching methods for concrete paving is the Tine trenching method. When concrete paving, use piano lines in the direction of road crossing to give grooves to the pavement. However, the Tine trenching method is suitable for forming horizontal grooves, but not suitable for forming vertical grooves. Also, the drainage effect is insufficient.

The present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a vertical trench formation technology that is easy to construct.

The present invention that solves the above-mentioned problems is a longitudinal groove forming tool for paving, which is below the road surface leveler device and uses the traveling direction of the road surface leveler device as an axial direction. The self-weight of the pavement leveler device is pushed into the stroking plane, formed by a plurality of beam members arranged in parallel and in series.

By using the longitudinal groove forming tool for paving of the present invention, the construction of the longitudinal groove becomes easy. Furthermore, by arranging the beam members in series, when the beam members arranged on the rear side in the traveling direction wear out, only the beam members may be replaced.

In this invention, the plurality of beam members preferably include a first beam member disposed on the front side in the traveling direction and a second beam member disposed on the rear side in the traveling direction.

In this invention, the cross-sectional dimensions of the first beam member and the second beam member are preferably different.

In this invention, it is preferable that the first beam member and the second beam member have different cross-sectional shapes.

In this invention, the materials of the first beam member and the second beam member are preferably different.

In this way, because the first beam member is different from the second beam member, the first beam member system helps to reduce insertion resistance and driven resistance, and the second beam member system helps to form a reliable longitudinal groove.

In this invention, the beam member is preferably inserted into a longitudinal groove provided under the road leveler device and fitted.

The present invention to solve the above-mentioned problems is a paving method using the longitudinal groove forming apparatus for paving. When the pavement is smoothed by the pavement leveler device, the beam member is pushed in by the weight of the pavement leveler device. Plane; in the state where the beam member is pushed into the care plane, the beam member is driven in the direction of travel of the road leveler device, forming a longitudinal groove.

In this invention, the paving system is asphalt paving, and after the longitudinal trench is formed, rolling paving is preferred

By rolling, the longitudinal groove section becomes narrower and shallower than the beam member section. Need indicators of good construction.

The evaluation method of the present invention that solves the above-mentioned problems is to evaluate the paving structure formed according to the paving method based on the cross-sectional area of the longitudinal groove after rolling.

Based on this, the quality of the construction can be evaluated.

According to the present invention, the formation of longitudinal grooves is easier to construct than conventional techniques. As a result, construction costs and construction period can be reduced.

1: tracked vehicle

2: driving seat

3: funnel

4: Feeder

5: Spiral spreader

6: Ramming machine

7: Main body road leveler

8: Telescopic road leveler

9: Vibrator

11: Longitudinal groove forming appliance

12: beam member

13: screw pile

14: Beam member end

15: Longitudinal groove

16: Stop plate

20: longitudinal groove

21: Grassroots

22: Lower floor

23: Upper floor

30: longitudinal groove

31: Hole

32: Curve part

33: straight line

34: Mouth

40: Longitudinal groove

41: Concrete Road Polishing Machine

42: Longitudinal groove forming device

43: Beam member

44: Vibrator

50: longitudinal groove

51: mode

52: Longitudinal groove forming device

53: Beam member

Figure 1 is a schematic configuration diagram of an asphalt paving machine.

Fig. 2 is a road surface leveler and longitudinal groove forming tool (first embodiment).

Figure 3 is a detail of the longitudinal groove forming device.

Figure 3A is an example of a beam member.

Figure 3B is an example of a beam member.

Figure 3C is an example of a beam member.

Figure 3D is an example of a beam member.

Figure 4 is an explanatory diagram of the operation (side view).

Fig. 5 is an operation explanatory diagram (elevation).

Fig. 6 is an operation explanatory diagram (plan).

Fig. 7 is a schematic configuration diagram of an additional configuration (second embodiment).

Figure 8 shows the paving structure.

Figure 9 is a paving structure (modified example).

Fig. 10 is a paving structure (third embodiment).

Fig. 11 is a schematic configuration diagram of an additional configuration (fourth embodiment).

Figure 12 is a side view and elevation view of the additional configuration.

Figure 13 is a side view and elevation view of a modified example.

Figure 14 is the installation structure of the beam member.

Figure 15 is a detail of the longitudinal groove forming device.

Fig. 16 is a longitudinal groove forming device (sixth embodiment).

<First Embodiment>

~Composition~

The basic structure of the asphalt paver according to this embodiment will be described.

Figure 1 is a schematic configuration diagram of an asphalt paving machine. Asphalt paving machine is composed of the following various components and devices, crawler 1 required for driving; driver's seat 2 required for the operator to perform operation work; funnel 3, which is installed in front of the driver's seat 2, asphalt mixture It is thrown in from the dump truck; the feeder 4 is to transport the thrown asphalt mixture to the rear; the screw spreader 5 is arranged behind the driver's seat 2 to spread the asphalt mixture to the road evenly Width; ramming machine 6, which is installed behind the screw spreader 5, and compacts the asphalt mixture; and the main body road leveler 7 and telescopic road leveler 8, etc. Flatten the asphalt mixture. It can also replace tracked vehicles and use wheels.

Two telescopic road levelers 8 are arranged on the left and right of the main body road leveler 7 (see FIG. 2 ). By extending and contracting the telescopic road leveler 8 in the left-right direction (horizontal to the direction of travel), it is possible to lay out any width.

The vibrator (vibration mechanism) 9 is provided in the road levelers 7 and 8. The vibrator 9 works with the ram compactor 6 to compact the asphalt mixture.

As a characteristic configuration of this embodiment, the longitudinal groove forming tool 11 is provided below the bottom plates of the road levelers 7 and 8 (see FIG. 2 ). FIG. 3 is a detailed view of the longitudinal groove forming device 11.

The longitudinal groove forming tool 11 is composed of a plurality of beam members 12. The beam members 12 are arranged side by side with the traveling direction of the road leveler as the axial direction.

In FIG. 3, as a preferred example, the cross-section of the beam member represents an inverted triangle, but a circle, a semicircle, a flat plate shape, an inverted trapezoid, etc. can also be applied.

The beam member end 14 may have a flat shape 14A (see FIG. 3A), but from the viewpoint of reducing the resistance of the asphalt, it is better to process it into a tapered shape (see FIGS. 3B to 3D). Figures 3A1, 3B1, 3C1, and 3D1 are perspective views in the same state as the installation, and Figures 3A2, 3B2, 3C2, and 3D2 are perspective views in the reversed state. The end portion 14B is formed by cutting off the pressing surface side obliquely and forming a triangular pyramid. Become a shape similar to the bow of the ship. The end portion 14C is formed by cutting off the mounting surface side obliquely and forming a triangular pyramid. Become similar to the shape of high-speed rail vehicles. The end portion 14D is formed by cutting off the pressing surface side and the mounting surface side obliquely to form a square pyramid. It becomes a shape similar to a spear.

The beam member 12 has a cross-sectional width of 2 mm to 40 mm and a cross-sectional height of 2 mm to 40 mm. The cross-sectional width of the beam member 12 is preferably 5 mm to 20 mm, and the cross-section The height is preferably 5mm~20mm. The length of the beam member 12 is 50 to 110% of the length of the bottom surface of the road leveler. When the beam member 12 is pushed into the asphalt pavement plane, because the beam member 12 may be bent due to the resistance of the asphalt, it is not good to be too long.

The center of the beam member 12 is arranged at intervals of 10 mm to 200 mm. The center of the beam member 12 is preferably arranged at intervals of 20 mm to 100 mm.

The beam member 12 can also be welded under the floor of the road levelers 7, 8 or can be mechanically joined. For example, if the screw type is used, the replacement system is easy, and the cross-sectional shape or size of the beam member can be selected.

~Construction~

The paving method of this embodiment will be described. FIG. 4 is a side view related to the operation description, FIG. 5 is an elevation view related to the operation description, and FIG. 6 is a plan view related to the operation description.

First, the general paving method will be explained.

The bituminous mixture is manufactured in the mixing plant and transported to the construction site by a dump truck, and then put into the funnel 3 from the dump truck. The temporarily stored asphalt mixture in the hopper 3 is transported by the feeder 4, and then expanded by the screw spreader 5, and paved by the main body road leveler 7 and the telescopic road leveler 8.

The asphalt paving machine includes a tracked vehicle 1 (or wheel). In order to maintain the flatness of the paving road, it travels slowly at a fixed speed along the length of the road while paving.

At this time, the laying operation and the smoothing operation are continuously repeated. For example, after the laying operation is performed in the N area, the laying operation is performed in the continuous N+1 area. On the other hand, at the same time as the laying operation in the N+1 area, the smoothing operation is performed in the N area. However, it does not repeat discretely but continuously.

After the asphalt mixture paving operation is completed, rollers are used to roll and compact the asphalt paving surface.

The characteristic action of this embodiment is that the beam member 12 is pushed by the smoothing plane when smoothing the paved road surface, and moves in the smoothing parallel direction in the pressed state to form the longitudinal groove 20.

The beam member 12 is provided below the bottom plates of the road levelers 7 and 8. The self-weight action of the road levelers 7 and 8 is pushed into the stroking plane by the pressure beam member 12 (refer to FIG. 4 and FIG. 5).

When the asphalt paver is traveling, the beam member 12 is driven while maintaining the state of being pushed into the stroking plane.

At this time, in order to reduce the follower resistance, the inclination angle of the traveling direction side of the road leveler may be slightly raised (see FIG. 4).

The longitudinal groove 20 is formed in a manner corresponding to the trajectory generated by the travel of the beam member 12.

The vibration of the vibrator 9 is transmitted to the beam member 12, and the bone material at the corresponding position of the longitudinal groove 20 is moved to both walls of the longitudinal groove 20.

By the roller rolling, the cross-sectional width of the longitudinal groove 20 is narrower than the cross-sectional width of the beam member 12, and the depth of the vertical groove 20 is shallower than the cross-sectional height of the beam member 12. The details will be described later in the test construction.

The extension of the longitudinal groove 20 corresponds to the travel distance of the beam member 12. The center interval of the adjacent longitudinal grooves 20 corresponds to the center interval of the beam member 12.

Furthermore, it is preferable that the cross-sectional width (=longitudinal groove interval-longitudinal groove cross-sectional width) forming the peak portion of the adjacent longitudinal groove is equal to or greater than the maximum aggregate size of the asphalt aggregate. Where the peak is formed, the longitudinal groove of the rolling operation is contained by containing relatively large aggregates Improved shape stability. That is, because the aggregate supports the rolling load, the peak portion is difficult to collapse, and the shape of the longitudinal groove is maintained.

~Effect~

The effect of this embodiment will be explained by comparison with conventional technology.

In the past, it was the mainstream trenching method. After the construction was carried out in the same way as general paving, the trenching method was used for cutting. In addition, a dedicated cutting machine is required. Therefore, compared with general road paving, there is a problem that the construction cost becomes higher and the construction period becomes longer. Furthermore, a dust treatment step is required in the cutting step. At this point, there are also issues related to the construction cost and construction period.

In contrast, in the present embodiment, since the vertical trench 20 is formed when the asphalt mixture is flattened (to be precise, at the same time as the smoothing), the vertical trench is formed in a system that is easier to construct than the conventional technology. That is, because no additional steps are required, the construction period becomes shorter. In addition, the longitudinal groove forming device 11 has a simple structure and is driven by the asphalt paving machine, so that the construction cost becomes cheap.

The cutting method of the conventional technology is that the bone material in the asphalt is also cut, so part of the bone material is exposed on the wall surface of the longitudinal groove, and the bone material may be scattered. As a result, there are problems related to durability.

On the other hand, in this embodiment, by vibrating and the pressing force of the beam member 12, the bone material located at the corresponding position of the longitudinal groove 20 is pushed into both walls of the longitudinal groove 20. As a result, the bone material is not exposed, the possibility of the bone material scattering is reduced, and the durability is improved.

Furthermore, by processing the beam member end portion 14 from a flat shape (refer to FIG. 3A) into a tapered shape (refer to FIGS. 3B to 3D), the asphalt resistance is reduced. As a result, lateral shaking of the beam member 12 is suppressed, and construction with higher accuracy can be realized. Also, the tapered side is gradually pushed by the asphalt mixture, and the asphalt mixture is indeed compacted. Thereby, a longitudinal groove having durability can be formed more reliably.

<Second Embodiment>

~Composition~

The characteristic structure of the second embodiment will be described. The second embodiment adds a characteristic structure to the first embodiment. FIG. 7 is a schematic diagram of the configuration of the second embodiment.

Below the ramming machine 6 (refer to FIG. 1) of the asphalt paver, a plurality of substantially conical convex portions, for example, iron studs 13 are provided in a direction perpendicular to the traveling direction.

The diameter of the cylindrical portion of the base of the screw pile 13 is 2 mm to 40 mm. It is better to be 5mm~20mm. It is better to have a larger cross-sectional width than the beam member 12 (described later). The height of the screw pile 13 is 2 mm to 40 mm. It is better to be 5mm~20mm. It is better that the cross-sectional heights of the tie beam members 12 are equal.

The center interval of adjacent screw piles 13 is an interval of 10 mm to 200 mm, and corresponds to the center interval of the beam member 12. In addition, the center position of the screw pile 13 corresponds to the center position of the beam member 12.

The screw pile 13 system can also be welded to the underside of the ramming machine 6 or can be mechanically joined. For example, if the screw type is adopted, the replacement system is easy, and the size of the screw pile can be selected.

~Construction~

The paving method of this embodiment will be described. The basic operation is the same as in the first embodiment.

The ram 6 series produces up and down vibrations, which are then compacted via the bottom plate Asphalt mixture. The screw piles 13 are pushed into the paving plane every time, and a hole (recess) 31 corresponding to the screw piles 13 is formed.

On the other hand, the asphalt paving machine travels slowly at a fixed speed. As a result, holes 31 are repeatedly formed in the traveling direction at regular intervals on the paved road.

The road levelers 7 and 8 having the beam member 12 are provided behind the ramming machine 6 having the screw pile 13. Therefore, behind the formation of the hole 31, the beam member 12 moves to the corresponding position.

Thereby, the row of holes created by the screw pile 13 and the trajectory of the beam member 12 are unified to form a longitudinal groove 30.

Fig. 8 is an example of a paving structure having a longitudinal groove 30. The both wall surfaces of the longitudinal trench 30 have a curved portion 32 and a straight portion 33 that repeat in the longitudinal direction of the road. That is, a part of the peripheral edge portion of the hole 31 becomes a curved portion 32, and a part of the locus of the beam member 12 becomes a straight portion 33.

Figure 9 is another example of a paving structure. By increasing the vibration frequency of the ramming machine 6, the formation of the holes 31 becomes shorter and the holes 31 overlap each other. Both wall surfaces of the longitudinal groove 30 have a curved portion 32 and a mouth portion 34 that are repeated in the longitudinal direction of the road. The mouth portion 34 is formed between adjacent curved portions 32.

~Effect~

The effect of the second embodiment will be described by comparison with the first embodiment.

Since the hole 31 is formed at the corresponding position before the beam member 12 travels, the insertion resistance and the driven resistance of the beam member 12 are greatly reduced. As a result, the lateral shaking of the beam member 12 is suppressed, and construction with higher accuracy can be performed.

Since the longitudinal groove 30 has a curved portion 32, the surface area of the side surface increases. As a result, the stress when the load acts on the longitudinal groove 30 is reduced. Therefore, the durability is improved.

Since the longitudinal groove 30 has a curved portion 32, the surface area of the side surface increases. As a result, the movable range of the aggregate located at the corresponding position of the longitudinal groove 30 becomes wider. The possibility of scattering of aggregates is reduced and durability is improved.

Since the longitudinal groove 30 has the curved portion 32, the contact area with the tire increases when the vehicle runs. As a result, the grip is improved.

Since the longitudinal groove 30 has a curved portion 32, the contact direction with the tire is dispersed when the vehicle is traveling. As a result, the sounds interfere with each other, and the sound insulation force increases.

The longitudinal groove 30 is in a cold area, and the effect enhanced by the longitudinal groove can be further expected.

Since the longitudinal groove 30 has the curved portion 32, the contact area with the tire increases when the vehicle runs. The effect of promoting the abrasion of frozen ice (black ice burn) is improved.

The longitudinal groove 30 has a curved portion 32. The curved portion 32 serves as an obstacle to suppress the outflow of the antifreeze agent. As a result, the snow melting effect continues.

Since the longitudinal groove 30 has a curved portion 32, the surface area of the side surface increases, and the groove space also increases. As a result, the heat storage effect is improved, and the snow accumulation prevention effect and the snow melting effect are also improved.

Next, the effect of the second embodiment will be described by comparing with the hole row (trajectory of the beamless member) caused by the screw pile 13.

Even if there is no trajectory of the beam member, by raising the At the vibration frequency, the formation of the holes 31 becomes shorter, and the holes 31 overlap each other. As a result, a row of holes is formed and a paving structure similar to the longitudinal groove 30 is formed.

However, as a result of repeated testing and construction, in the absence of the trajectory of the beam member, the uneven shape of the longitudinal groove becomes larger and the drainage function is also insufficient.

In contrast, in the present embodiment, a clear longitudinal groove shape can be formed by the locus of the beam member, and a sufficient drainage function can be obtained.

In addition, when there is no trajectory of the beam member, the mouth 34 becomes an acute angle, stress is concentrated, and there is a problem related to durability.

In contrast, in the present embodiment, the mouth 34 is pushed from the side by the locus of the beam member, the sharpness is relaxed (see FIG. 9), the stress is dispersed, and the durability is improved.

~Remarks~

8 and 9 are examples of the case where the diameter of the screw pile 13 is larger than the cross-sectional width of the beam member 12. On the other hand, the diameter of the screw pile 13 may be smaller than the cross-sectional width of the beam member 12.

In this case, since the longitudinal groove 30 does not have the curved portion 32, the effect of the curved portion 32 cannot be expected. However, the insertion resistance and the driven resistance of the beam member 12 are greatly reduced, and the lateral shaking of the beam member 12 is suppressed, and the effect that a higher-precision construction can be obtained can be obtained.

<Third Embodiment>

The present invention can also be applied to an asphalt paving composed of a lower layer 22 having a waterproof function and an upper layer 23 having a drainage function. Fig. 10 is a schematic diagram of the configuration of the third embodiment. Explain application examples.

First of all, the No. 6 crushed stone and No. 7 crushed stone will be mixed in a predetermined proportion An asphalt mixture of stone, crushed sand, fine sand, stone powder, and asphalt is provided on the base layer 21. For example, the mixing ratio of No. 6 gravel is 64.5~72.5%, the mixing ratio of No. 7 gravel is 7.5~13%, the mixing ratio of broken sand is 5~7%, and the mixing ratio of fine sand is 5~7%. The proportion of stone powder is 8~12%, and the amount of asphalt is set to 4~7% of the aggregate. The particle size range of the mixture is 100% at the nominal size of the sieve opening 19mm, 90-100% at 13.2mm, 21-40% at 4.75mm, 15.5-29.5% at 2.36mm, 6.5-12.5% at 75μm .

As the asphalt, it is better to use high-performance modified asphalt. With this, excellent flow resistance and resistance to scattering of the aggregate can be achieved.

After setting the asphalt mixture layer, it will be paved by asphalt paving machine. The operating condition of the asphalt paver at this time is that the traveling speed is 1.5 m/min, the vibration of the ramming machine is 1120 min-1, and the vibrator is 1020 cpm. Furthermore, it was rolled more than 11 times with a Macadam roller, and more than 9 times with a 15t rubber roller. The paving temperature is set to 160±10℃. The primary rolling temperature becomes 155±10°C. The secondary rolling temperature becomes 90±10°C.

By the compaction of the asphalt mixture layer, an asphalt paving layer with a thickness of about 40 mm is formed. Asphalt mortar is collectively filled on the lower layer 22 (thickness about 30 mm) side of the asphalt paving layer. Asphalt mortar is composed of crushed sand, fine sand, stone powder and asphalt. That is, the lower the layer, the more the asphalt mortar is filled in the voids between the aggregates and the aggregates. By this, water does not penetrate into the base layer 21 side (waterproof function).

On the other hand, on the upper layer 23 (thickness about 10 mm) side of the asphalt paving layer, the filling amount of the asphalt mortar is small. Asphalt binds the bone material to the bone material, but the voids remain. By this, water can move relatively freely in the gap. That is, the drainage function can be more maintained.

The thickness of the upper layer is preferably about 5 to 40% of the thickness of the asphalt paving. In the above example, it is 25% (=10mm/40mm).

The longitudinal groove 20 is formed corresponding to the upper layer 23. The depth of the longitudinal groove 20 is preferably equal to the thickness of the upper layer, but a slight increase or decrease is acceptable. That is, the longitudinal groove 20 may be extended to the lower layer 22 or may be provided to the middle of the upper layer 23.

The asphalt paving system has both a waterproof function and a drainage function. Furthermore, by including the longitudinal groove 20, the drainage function is particularly improved.

<Fourth Embodiment>

~Summary~

In the actual construction repeating the first to third embodiments, it was found that the abrasion of the beam member 12 is more than originally thought. In particular, a lot of abrasion at the end of the beam member 12 occurs.

When the wear of the beam member 12 progresses, the predetermined longitudinal groove shape cannot be obtained, so the beam member 12 needs to be replaced.

At that time, if the beam member 12 was welded under the floor plates of the road levelers 7 and 8 or mechanically joined by screws or the like, it was learned that the replacement operation was more labor-intensive than originally thought.

~Beam split and its effect~

The characteristic configuration of the fourth embodiment will be described. The fourth embodiment adds a characteristic structure to the first embodiment. Figure 12 is a side view and a rear view.

The beam member 12 is formed by arranging the first beam member 12A arranged on the front side in the traveling direction and the second beam member 12B arranged on the rear side in the traveling direction in series. In addition, two divisions are used in the illustration, but it can also be 3 points Cut above. There may be no gap between the first beam member 12A and the second beam member 12B, but there may be some gap.

However, from the actual construction experience, it is found that the end of the beam member 12 is easily worn. In this embodiment, only the second beam member 12B needs to be replaced, and the amount of discarding can be reduced. That is, the first beam member 12A continues to be used.

Furthermore, the first beam member 12A and the second beam member 12B may be the same, but it is preferably different according to the following matters.

The cross-sectional dimensions of the first beam member 12A and the second beam member 12B are preferably different. That is, the cross-sectional size of the second beam member 12B is larger than the cross-sectional size of the first beam member 12A. For example, the width of the first beam member 12A is 12 × height 12 (mm), and the width of the second beam member 12B is 16 × height 15 (mm).

Thereby, the insertion resistance and driven resistance are reduced by the first beam member 12A, and on the other hand, the predetermined longitudinal groove size is secured by the movement of the second beam member 12B.

The cross-sectional dimensions of the first beam member 12A and the second beam member 12B are preferably different. That is, the cross-sectional shape of the first beam member 12A is an inverted triangle, and the cross-sectional shape of the second beam member 12B is an inverted trapezoid.

In the first beam member 12A, the top of the inverted triangle bites into the paved road to reduce insertion resistance and driven resistance. In addition, in the first beam member 12A that precedes, the top of the inverted triangle is difficult to wear. On the other hand, since the second beam member 12B has no top, it is difficult to wear. In addition, since the first beam member 12A has reduced the insertion resistance and the driven resistance, even if the second beam member 12B does not have a top, the problems related to the insertion resistance and the driven resistance hardly occur.

The materials of the first beam member 12A and the second beam member 12B are preferably different. That is, the rigidity of the second beam member 12B becomes higher than that of the first beam member 12A high. For example, pre-hardened steel (PXA30) is used for the first beam member 12A, and cold work tool steel (SDK11) is used for the second beam member 12B.

As a result, the wear resistance of the second beam member 12B is improved. As a result, the frequency of replacement is reduced. In addition, only the second beam member 12B is made of a high-rigidity material, and the first beam member 12A is made of a low-rigidity material, whereby the production cost can be suppressed.

The first beam member 12A and the second beam member 12B preferably have different lengths. That is, the length dimension of the second beam member 12B is longer than that of the first beam member 12A. For example, the length of the first beam member 12A is 90 to 120 (mm), and the length of the second beam member 12B is 100 to 150 (mm).

Thereby, the first beam member 12A system helps to reduce insertion resistance and driven resistance, and the second beam member 12B system helps to form a clear longitudinal groove.

As shown above, it is possible to suppress the production cost and improve the defects related to the replacement of the beam member. As a result, operating costs can be reduced.

The difference between the first beam member 12A and the second beam member 12B may be appropriately combined.

Fig. 13 is a side view and a rear view of a modified example. The first beam member 12A has a distal tip 14, and the second beam member 12B is different in that it does not have a distal tip 14. In addition, the rigidity of the second beam member 12B is higher than that of the first beam member 12A.

On the other hand, the cross-sectional shape is an inverted trapezoid, and the cross-sectional dimensions and length dimensions are common.

In addition to the above-described modification, the first beam member 12A and the second beam member 12B having different points may be appropriately combined.

~Installation structure~

FIG. 14 shows the mounting structure of the beam member 12.

Below the bottom plates of the road levelers 7 and 8, a longitudinal groove 15 corresponding to the shape of the bottom of the upper portion of the second beam member 12B is provided. That is, the vertical groove 15 is formed by the inverted trapezoidal space continuing in the traveling direction to the rear end surface of the bottom plate.

The upper and lower portions of the second beam member 12B (shaded portions in FIG. 12) are inserted from the rear end of the bottom plate and are fitted into the longitudinal grooves 15. After the plurality of beam members 12 are arranged in parallel, a stopper plate 16 is provided at the end of the second beam member 12B in a direction orthogonal to the traveling direction. The beam member 12 is installed by the engagement of the retaining plate 16 and the bottom plate.

The installation structure related to insertion fit is easier to disassemble than welding or mechanical joining. As a result, the beam member 12 can be replaced at the construction site, and the labor time for replacement work is reduced.

On the other hand, the first beam member 12A is attached by welding or mechanical joining. The first beam member 12A is replaced less frequently than the second beam member 12B, and does not hinder the ease of replacement.

In addition, in the above-mentioned installation example, the first beam member 12A is installed by welding or mechanical joining, and the second beam member 12B is installed by inserting and fitting. The installation structure is different, but it can also be shown as a modification The first beam member 12A and the second beam member 12B are attached by insertion fitting (see FIG. 13 ).

The installation structure in the modification also ensures the ease of replacement.

<Test Construction and Evaluation Method>

The second embodiment is combined with the fourth embodiment to perform test construction.

The effective cross-sectional width of the beam member 12 (second beam member 12B) is 16 mm (upper bottom 16 mm, lower bottom 3 mm), and the effective cross-sectional height is 15 mm. package When the fitting portion with the longitudinal groove 15 is included, the cross-sectional width is 24 mm and the cross-sectional height is 24 mm. The effective diameter of the screw pile 13 is 15 mm, and the effective height is 15 mm. The distance between the beam member 12 and the distance between the screw piles 13 (that is, the distance between the longitudinal grooves 30) is 40 mm.

In addition, the size is set in consideration of the results of the test construction to evaluate the grip, drainage, and sound insulation. For example, when the width of the tire of a car is 150 mm and the interval of longitudinal grooves is 40 mm, 3 to 4 longitudinal grooves 30 are in contact with the tire. On the other hand, a plurality of longitudinal grooves are often provided in the tire.

Temperature management is carried out in such a way that the temperature of the asphalt mixture at the time of shipment of the asphalt mixture factory becomes 170 to 175°C, the temperature at the arrival reaches 160 to 169°C, and the temperature at the time of one rolling becomes 150 to 160°C.

The cross-sectional dimensions (width×height) of the longitudinal groove 30 after rolling by plural rollers were measured. An example of additional measurement records is shown in Figure 15. Expediently, the vertical inversion indicates the shape of the longitudinal groove. Treat the cross-section as a roughly triangle and estimate the rough cross-sectional area. For the measurement of cross-sectional dimensions, use the model gauge. Laser cross-section measuring devices can also be used.

If the specification of the beam member used is determined to be one, the cross-sectional area of the longitudinal groove after rolling can also be used as an indicator (as shown below, it is not compared with the effective cross-sectional area of the beam member). The inventor proposed "clarity" as an indicator of the quality of construction. For example, if the definition exceeds 65 series "no rolling", the definition exceeds 65~35 series "deep groove", the definition exceeds 35~30 series "clear", the definition exceeds 30~25 series "standard", the definition exceeds 25~15 is "thin", and below 15 is "ultra-thin".

In the example of Figure 14, the average value of the longitudinal groove cross-sectional area obtained by measurement is 31 mm ^{2. When} compared with the effective cross-sectional area of the beam member, the clarity becomes 31, and the evaluation construction result is “clear”.

In addition, when the temperature management range is exceeded, the construction result is often "thin" or "ultra-thin". That is, sufficient clarity cannot be obtained.

By the roller rolling, the cross-sectional width of the longitudinal groove 20 becomes narrower than the cross-sectional width of the beam member 12, and the depth of the vertical groove 20 becomes shallower than the cross-sectional height of the beam member 12.

The effective cross-sectional area of the beam member is 142.5mm ² (=(16+3)×15/2). The ratio (percentage) of the measured longitudinal groove cross-sectional area to the effective cross-sectional area of the beam member is taken as an indicator of whether the construction is good (clarity). Accordingly, even if the specifications of the beam members are not unified, an objective assessment can be made.

For example, it is required that the definition exceeds 46 series "no rolling", the definition exceeds 46~25 series "deep groove", the definition exceeds 25~21 series "clear", the definition exceeds 21~18 series "standard", the definition exceeds 18~11 is "thin", and the definition below 11 is "ultra-thin".

In the example of Figure 14, the average value of the longitudinal groove cross-sectional area obtained by measurement is 31 mm ^{2. When} compared with the effective cross-sectional area of the beam member, the clarity becomes 21.7, and the evaluation construction result is “clear”.

An example of the application of this evaluation method.

On-site construction practice, before the official construction is about to begin, conduct on-site test construction under the same conditions as the official construction. As a result of the on-site test and construction, when it is evaluated as a "deep ditch", the rolling pressure may be insufficient, and then confirm the temperature of the asphalt mixture. On the other hand, when the evaluation is "thin" or "ultra-thin", confirm the installation or wear of the beam members.

The result of on-site testing and construction, when the assessment is "clear" or "standard", the official construction begins. After the formal construction is completed, measure the cross-sectional dimensions of the longitudinal groove to confirm whether it is "clear" or "standard".

In addition, the classification based on the level of clarity is provisionally expressed, and various indicators such as the average profile depth (MPD) of the road surface, the amount of infiltrated water, the sliding resistance value (BPN) (DF tester), etc. can also be used The relevance of the regulations.

However, according to confirmation tests related to the average profile depth (MPD) of the pavement, the amount of water infiltration, the sliding resistance value (BPN) (DF tester), etc., the detailed pavement properties can be grasped, and on the other hand, it takes a lot of human time. By substituting "sharpness", the nature of the road surface can be easily grasped.

<Fifth Embodiment>

~Summary~

The first to fourth embodiments are examples in which the present invention is applied to asphalt paving. On the other hand, the present invention can also be applied to concrete paving.

There are several methods of concrete paving. The representative example is the fixed template construction method. The fixed formwork method is to set the formwork frame and track, and spread it by spreader, and then use the concrete paving machine to compact it.

In recent years, in an attempt to improve construction capabilities, construction has also been carried out using sliding formwork methods. Flatten and compact using a sliding formwork paving machine that can self-propelled by tracked vehicles. No need for mold frame and track system.

In the case of a small amount of construction, it will be paved by manpower and then compacted by a concrete road polishing machine (simple paving machine).

~Characteristic composition and construction~

As a characteristic configuration of the fifth embodiment, the vertical groove forming device 42 is provided under the concrete road flourizer 41.

Figure 15 is a detail of the longitudinal groove forming device. The longitudinal groove forming tool 42 is composed of a plurality of beam members 43. The beam members 43 are arranged side by side with the traveling direction of the road polisher as the axial direction.

As the cross-sectional shape of the beam member, an inverted triangle, a circle, a semicircle, a flat plate, an inverted trapezoid, etc. can be applied.

The beam member 43 has a cross-sectional width of 2 mm to 40 mm and a cross-sectional height of 2 mm to 40 mm. The cross-sectional width is preferably 5 mm to 20 mm, and the cross-sectional height is preferably 5 mm to 20 mm. The length of the beam member 43 is 50 to 110% of the length of the bottom surface of the road leveler. Since the concrete in pouring is less in insertion resistance than asphalt, the beam length may be longer than in the first embodiment.

The center of the beam member 43 is arranged at intervals of 10 mm to 200 mm. The center of the beam member 43 is preferably arranged at intervals of 20 mm to 100 mm.

The beam member 43 system may also be welded to the underside of the concrete road polishing machine 41, or may be mechanically joined. For example, if the screw type is used, the replacement system is easy, and the cross-sectional shape or size of the beam member can be selected.

In the fifth embodiment, the concrete road finishing machine and the sliding formwork paving machine can also be driven, and the concrete road finishing machine and the concrete paving machine can also be driven.

The vibrator (vibration mechanism) 44 is provided in the concrete road flouring machine, and the concrete road flouring machine 41 is self-propelled by the reaction force of vibration. Therefore, only the concrete road polishing machine 41 may be used.

The characteristic action of this embodiment is that when the paving road is flattened, the beam member 43 is pressed by the paving plane, and moves in the paving parallel direction in the pressed state to form the longitudinal groove 40.

The beam member 43 is installed under the concrete road polishing machine 41. Due to the self-weight of the concrete road polishing machine 41, the beam member 43 is pushed into the flattening surface by the pushing force.

When the concrete road polishing machine 41 travels, the beam member 43 is driven while maintaining the state of being pushed into the paving plane.

The longitudinal groove 40 is formed corresponding to the trajectory caused by the travel of the beam member 43.

The vibration of the vibrator 44 is transmitted to the beam member 43, and the bone material at the corresponding position of the longitudinal groove 40 moves to both walls of the longitudinal groove 40.

The cross-sectional width of the longitudinal groove 40 corresponds to the cross-sectional width of the beam member 43, and the depth of the vertical groove 40 corresponds to the cross-sectional height of the beam member 43.

The extension of the longitudinal groove 40 corresponds to the travel distance of the beam member 43. The center interval of the adjacent longitudinal grooves 40 corresponds to the center interval of the beam member 43.

~Effect~

The effect of this embodiment will be explained by comparison with conventional technology.

One of the trenching methods for concrete paving in the conventional technology is the Tine trenching method. When concrete paving, use piano lines in the direction of road crossing to give grooves to the pavement. However, the Tine trenching method is suitable for forming horizontal grooves, but not suitable for forming vertical grooves. Also, the drainage effect is insufficient.

In contrast, in this embodiment, a clear longitudinal groove shape can be formed according to the locus of the beam member, and a sufficient drainage function can be obtained.

<Sixth Embodiment>

~Characteristic composition and construction~

In the fifth embodiment, the vertical groove forming tool is installed on the concrete road polishing machine, but the vertical groove forming tool 52 may also be installed below the mold 51 of the sliding formwork paving machine. Fig. 16 is a longitudinal groove forming device of the sixth embodiment.

In addition, it is rare to call the mold of the sliding formwork paving machine as a road flouring machine device, but it essentially performs the same function, and in the expedient of the present invention, it is treated as one form of the road flouring machine device.

The longitudinal groove forming tool 52 is composed of plural beam members 53. The beam members 53 are arranged side by side with the traveling direction of the sliding formwork paving machine as the axial direction.

As the cross-sectional shape of the beam member, an inverted triangle, a circle, a semicircle, a flat plate, an inverted trapezoid, etc. can be applied. In the picture is a semicircle.

The beam member 53 has a cross-sectional width of 2 mm to 40 mm and a cross-sectional height of 2 mm to 40 mm. The cross-sectional width is preferably 5 mm to 20 mm, and the cross-sectional height is preferably 5 mm to 20 mm. The length of the beam member 53 is 50 to 150% of the length of the bottom surface of the mold. Since the concrete system has a lower insertion resistance than asphalt, the beam length may be longer than in the first embodiment.

The center of the beam member 53 is arranged at intervals of 10 mm to 200 mm. The center of the beam member 53 is preferably arranged at intervals of 20 mm to 100 mm.

The beam member 53 system may be welded to the lower surface of the mold 51, or may be mechanically joined. For example, if the screw type is used, the replacement system is easy, and the cross-sectional shape or size of the beam member can be selected.

The characteristic action of this embodiment is that when the sliding formwork paving machine smoothes the road surface, the beam member 53 is pushed by the smoothing plane, and moves in the direction of parallelization in the state of being pressed to form the longitudinal groove 50 .

The beam member 53 is provided below the mold 51. Simultaneously with the mold 51 forming a smoothing plane, the beam member 53 is pushed into the smoothing plane by the pressing force.

When the sliding formwork paving machine travels, the beam member 53 is driven while maintaining the state of being pushed into the stroking plane.

The longitudinal groove 50 (not shown) is formed so as to correspond to the trajectory generated by the travel of the beam member 53.

The sliding formwork paving machine has a vibration function, and this vibration system is transmitted to the beam member 53, and the bone material at the corresponding position of the longitudinal groove 50 is moved to both walls of the longitudinal groove 50.

The cross-sectional width of the longitudinal groove 50 corresponds to the cross-sectional width of the beam member 53, and the depth of the vertical groove 50 corresponds to the cross-sectional height of the beam member 53.

The extension of the longitudinal groove 50 corresponds to the travel distance of the beam member 53. The center interval of the adjacent longitudinal grooves 50 corresponds to the center interval of the beam member 53.

~Effect~

The effect of the sixth embodiment is substantially the same as that of the fifth embodiment.

In the case of construction according to the sliding formwork method, even if there is no concrete road finishing machine, vertical grooves can be formed.

<Seventh Embodiment>

The fifth embodiment and the sixth embodiment may be combined. However, it is important to arrange the beam member 43 of the fifth embodiment and the beam member 53 of the sixth embodiment at corresponding positions.

Make the concrete road polishing machine follow the sliding formwork paving machine.

First, the longitudinal groove 50 is formed by the advanced longitudinal groove forming tool 52 (refer to FIG. 16). Next, the longitudinal groove 40 is formed by the driven longitudinal groove forming tool 42.

The longitudinal groove 40 is formed at a position corresponding to the longitudinal groove 50. As a result, a clear longitudinal groove shape can be formed more reliably.

<Eighth Embodiment>

The sixth to seventh embodiments can be combined with the fourth embodiment. That is, in concrete paving, a mounting structure in which the beam members 43 and 53 are divided into two or more and inserted by fitting may be adopted.

In concrete paving, the same effect as that of the fourth embodiment can also be obtained.

12A: 1st beam member

12B: 2nd beam member

15: Longitudinal groove

16: Stop plate

Claims (9)

An apparatus for forming longitudinal grooves for paving is characterized in that, under the pavement leveler device, the traveling direction of the pavement leveler device is taken as the axial direction. The self-weight is pushed into the care plane, and a plurality of first beam members arranged side by side and a plurality of second beam members arranged side by side are formed; the first beam members and the second beam members It is arranged under the same pavement leveling device in series with respect to the axial direction; among the beam members arranged in series, at least the rear beam member is replaceable. For example, as for a longitudinal groove forming appliance for paving according to item 1 of the patent scope, the first beam members are arranged on the front side in the traveling direction, and the second beam members are arranged on the rear side in the traveling direction. For example, a longitudinal groove forming tool for paving according to item 2 of the patent scope, wherein the cross-sectional dimensions of the first beam member and the second beam member are different. For example, the longitudinal groove forming tool for paving of item 2 of the patent application scope, wherein the cross-sectional shape of the first beam member and the second beam member are different. For example, the longitudinal groove forming tool for paving of item 2 of the scope of patent application, wherein the material of the first beam member and the second beam member are different. The longitudinal groove forming apparatus for paving as described in any one of claims 1 to 5, wherein the beam member is inserted into the longitudinal groove provided under the road leveler device and fitted. A paving method, characterized by the use of longitudinal groove forming appliances as in any of items 1 to 6 of the patent application scope; When the pavement leveler device is used to smooth the pavement, the beam member is pushed into the stroking plane by its own weight; when the beam member is pushed into the stroking plane, the beam member is on the pavement The leveler device is moved in the direction of travel; a longitudinal groove is formed. For example, the paving construction method of item 7 of the patent application scope, in which the paving is asphalt paving; after the longitudinal groove is formed, the road surface is rolled. A construction evaluation method for asphalt paving is characterized by forming a paving structure using the paving construction method as claimed in item 8 of the patent scope, and evaluating the construction result based on the cross-sectional area of the longitudinal groove after rolling.

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