JP7191744B2 - Concrete pavement construction method and fluting system - Google Patents

Description

The present invention relates to concrete pavement technology, in particular to fluted concrete pavement.

With grooving pavement, grooves with a width of 6 to 9 mm and a depth of 4 to 6 mm are generally provided on the paved surface at intervals of 40 to 60 mm. There are two types of grooving pavement: the vertical type (longitudinal groove) that is installed along the traveling direction of the vehicle, and the horizontal type (horizontal groove) that is installed in the transverse direction.

Vertical grooving is primarily used on curvy road surfaces where increased lateral skid resistance is required. Horizontal grooving is effective mainly in shortening the braking distance of a vehicle, and is used on slopes and before intersections. In addition, the horizontal grooving can signal the driver and warn the driver of drowsy driving, excessive speed, etc. by the sound and vibration generated during driving.

In addition to increasing skid resistance, it also promotes drainage, dries the road faster, and prevents slippage in wet weather. In particular, it exerts an effect of suppressing hydroplaning.

In addition, it can be expected to have a soundproofing effect that absorbs frictional noise generated between the tires of a running vehicle and the road surface.

Furthermore, in cold regions, in addition to the remarkable anti-slip effect, the anti-freeze effect, the anti-snow accumulation effect, and the snow-melting effect are exhibited. With grooving pavement, the road surface becomes uneven and the surface area increases, and groove spaces are formed. In addition, when a chemical such as calcium chloride is sprayed as an anti-freezing agent, a portion of the chemical remains in the grooves even when a vehicle passes, so the snow-melting effect continues. In addition, even if black ice burns occur due to freezing of water on the road surface, the effect of accelerating black ice burn wear is exhibited by contact with the tires of passing vehicles.

Pavement includes asphalt pavement and concrete pavement. The present application focuses on concrete pavement.

One of the methods for forming grooves in concrete pavement is the tine grooving method. When laying concrete pavement, grooves are made on the paved surface using piano wire or the like in the cross-road direction. However, although the tine grooving method is suitable for forming lateral grooves, it is not suitable for forming longitudinal grooves. Also, the drainage effect is insufficient.

As another method, there is a cutting method using a dedicated machine. After concrete pavement, a cutting process is performed. Therefore, compared with general pavement, there are problems that the construction cost is higher and the construction period is longer. Furthermore, the cutting process requires a dust disposal process, and in this respect also, there are problems related to construction costs and construction periods.

Concrete pavement includes a concrete floor slab and a cast-in-place concrete pavement.

The applicant of the present application has proposed a concrete floor slab with vertical grooves (Patent Document 1) and a cast-in-place concrete pavement with vertical grooves (Patent Document 2). The present application relates to cast-in-place concrete paving.

Patent Literature 2 discloses a concrete pavement construction method having flutes using slip form pavers.

The bottom surface of the mold of the slip form paver is provided with longitudinal groove forming means formed of a plurality of beam members arranged in parallel with the advancing direction as the axial direction.

When forming a concrete pavement with a slip form paver, the vertical groove forming means is pushed into the pavement surface by the weight of the mold itself, and in a state where the groove forming means is pushed into the paved surface, the vertical groove forming means follows the traveling direction. to form flutes.

JP 2018-193756 A Patent No. 5913753

The slipform paver is position controlled. As a result, the concrete pavement is formed so as to maintain the paved surface level accuracy. However, if vertical grooves are formed while concrete pavement is being formed, the concrete equivalent to the vertical grooves will be pushed out onto the pavement surface, lowering the level accuracy of the paved surface (that is, causing unevenness), and the excess concrete will be removed from the vertical grooves. In some cases, the flute shape accuracy was also lowered.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems, and to provide a technique for forming flutes with good paved surface level accuracy and flute shape accuracy.

The present invention for solving the above problems is a concrete pavement construction method using slip form pavers. The bottom surface of the mold of the slip form paver is provided with first vertical groove forming means formed by a plurality of beam members arranged in parallel with the advancing direction as the axial direction. When forming a concrete pavement with the slip form paver, the first vertical groove forming means is pushed into the pavement surface by the dead weight of the mold. In a state in which the first vertical groove forming means is pushed into the pavement surface, the first vertical groove forming means is driven in the traveling direction to temporarily form vertical grooves. An autofloat is provided behind the slipform paver. The autofloat smoothes the paved surface and fills the temporarily formed vertical grooves. A second fluting means is provided outside the slipform paver and behind the autofloat. The second vertical groove forming means forms vertical grooves again in the buried vertical groove corresponding portions.

The accuracy of the paved surface level is ensured by once filling the temporarily formed longitudinal grooves.

In the above invention, preferably, the slip form paver provided with the first vertical groove forming means has a vibrator, and the vibrator applies vibration when the first vertical groove forming means temporarily forms the vertical grooves. , the second vertical groove forming means does not have a vibrator, and there is no vibration due to the vibrator when the second vertical groove forming means forms the vertical grooves.

The beam insertion resistance is reduced by applying vibration during temporary formation. Precise flute shape is maintained by not vibrating during re-forming.

In the above invention, preferably, the maximum particle size of coarse aggregate used for concrete pavement is 20 mm or less.

This ensures the effects of the present application.

In the above invention, preferably, a broom finisher is provided behind the second vertical groove forming means, and the broom finisher finishes the pavement surface on which the vertical grooves are formed.

As a result, the pavement surface is rough-finished, chamfering is performed, and the chamfered portions and flute side surfaces are also rough-finished.

The present invention, which solves the above problems, is a fluting system for concrete pavement using slipform pavers. It is formed from a plurality of beam members arranged in parallel on the lower surface of the mold of the slip form paver with the traveling direction as the axial direction, and when forming concrete pavement with the slip form paver, the self weight of the mold A first vertical groove forming means that is pushed into the paved surface and is driven in the direction of travel while being pushed into the paved surface to temporarily form vertical grooves; An auto-float that fills the temporarily formed vertical grooves while smoothing, and an auto-float that is provided outside the slip form paver and behind the auto-float, and fills the filled vertical grooves again. forming second fluting means.

In the above invention, preferably, the second vertical groove forming means is provided on a slip form paver separate from the slip form paver.

In the above invention, preferably, the second vertical groove forming means is provided behind the autofloat, and includes a plate and a plurality of beam members arranged in parallel on the lower surface of the plate with the traveling direction as the axial direction. formed from

In the above invention, preferably, the second vertical groove forming means is provided behind the auto float, and includes a rotating drum and a plurality of grooves arranged in parallel on the peripheral surface of the rotating drum with the traveling direction as the axial direction. It is formed from a convex member.

According to the vertical groove forming technique of the present invention, the paved surface level accuracy is good, and the vertical groove shape accuracy is also good.

Schematic diagram of a slipform paver Schematic diagram of mold and flute forming tool (temporary forming) Outline of vertical groove forming system according to the first embodiment and construction situation diagram (planar) Outline of vertical groove forming system according to the first embodiment and construction situation diagram (side) Detailed configuration diagram (side view) attached to the vertical groove forming tool (temporary forming) Beam detail drawing (perspective view) Contrast conceptual diagram of flute provisional formation and flute reformation Schematic diagram of concrete pavement with flutes Detailed view of flutes An example of evaluation test results related to vertical groove function Classification based on evaluation test results related to vertical groove function Outline of the vertical groove forming system according to the second embodiment and construction situation diagram (side) Fluting instrument (reforming) schematic (perspective view) Outline of the vertical groove forming system according to the third embodiment and construction situation diagram (plane) Outline of vertical groove forming system according to the third embodiment and construction situation diagram (side) Schematic diagram of broom finishing tool (side)

-Overview of the first embodiment-
FIG. 1 is a schematic diagram of a slipform paver. In recent years, attention has been focused on the slipform construction method with the intention of improving construction capabilities. Using a slip form paver that can be self-propelled by a crawler, it is spread and compacted by a mold.

At this time, the operation of spreading and the operation of leveling are continuously repeated. For example, after the laying action is performed in the N area, the laying action is performed in the continuous N+1 area. On the other hand, at the same time as the spread operation in the N+1 area, the leveling operation is performed in the N area. However, it is repeated continuously, not discretely.

The formwork and rails in the set-up construction method are not required, simplifying construction. As the scale of construction increases, the effects of labor saving and shortening of the construction period become more pronounced.

The slipform pavers are also position controlled, resulting in excellent paving shape accuracy.

A slip form paver is used in this embodiment.

~ Temporary Groove Formation ~
FIG. 2 is a schematic diagram of a mold 51 and a fluting tool (temporary formation) 52 . In this embodiment, a slipform paver mold 51 is provided with a fluting device 52 on its underside.

The fluting tool 52 consists of a plurality of beam members 53 . The beam members 53 are arranged in parallel with the direction of travel of the slip form paver as the axial direction.

As the cross-sectional shape of the beam member, an inverted triangular shape, a circular shape, a semi-circular shape, a flat plate shape, an inverted trapezoidal shape, or the like can be applied. In the illustration, it has an inverted trapezoidal shape.

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. Preferably, the cross-sectional width is between 5 mm and 15 mm and the cross-sectional height is between 5 mm and 15 mm. The length of the beam member 53 is 50-150% of the mold bottom length. More preferably, it is 50 to 100%.

The centers of the beam members 53 are arranged at intervals of 10 mm to 200 mm. Preferably, the centers of the beam members 53 are arranged at intervals of 20 mm to 70 mm.

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

3 and 4 are an outline of a vertical groove forming system according to the first embodiment and a construction situation diagram. 3 is a plan view and FIG. 4 is a side view.

A characteristic operation of this embodiment is that when the slip form paver smooths the paving surface, the beam member 53 is pressed against the smoothing surface by the weight of the mold 51 and moves in the smoothing direction while being pressed. Then, the vertical grooves 50 are (temporarily) formed.

The beam member 53 is provided on the bottom surface of the mold 51 . At the same time when the mold 51 forms the leveling surface, the pressing force pushes the beam member 53 into the leveling surface.

As the slipform paver advances, the beam member 53 moves while remaining pressed against the leveling surface.

A longitudinal groove 50 is (temporarily) formed corresponding to the trajectory of the beam member 53 as it advances.

The slipform paver has a vibrating function (detailed view 5), and this vibration is transmitted to the concrete and the beam member 53, and the aggregate that was in the position corresponding to the flute 50 moves to both walls of the flute 50.

The cross-sectional width of the flutes 50 approximately corresponds to the cross-sectional width of the beam member 53 , and the depth of the flute 50 approximately corresponds to the cross-sectional height of the beam member 53 .

The extension of flute 50 corresponds to the travel distance of beam member 53 . The center-to-center spacing between adjacent longitudinal grooves 50 corresponds to the center-to-center spacing of beam members 53 .

As a result of controlling the position of the slip form paver, the position of the beam member 53 is also controlled. As a result, vertical grooves 50 are formed at predetermined positions.

FIG. 5 is a detailed configuration diagram attached to the fluting tool (temporary forming). The slip form paver is equipped with a vibrator 56, an auger 57 and a tamper 58 on the forward side of the mold 51 in the direction of travel.

After the concrete is supplied, it is vibrated by the vibrator 56 to increase its fluidity, stirred by the auger 57 and compacted by the tamper 58 .

~filling the groove~
An autofloat 62 is provided behind the slipform paver via an arm 61 (see FIGS. 3 and 4).

The auto float 62 follows the advancing direction of the slip form paver and also moves in the width direction (perpendicular to advancing direction). As a result, the pavement surface is leveled and the accuracy of the pavement surface level is ensured.

At this time, the vertical grooves 50 are filled with the mortar component containing a large amount of water on the pavement surface.

That is, the longitudinal groove equivalent portions 60 made of mortar components containing a large amount of moisture without aggregates are formed.

-Groove re-formation-
Further behind the autofloat 62, a plate 75 is provided via an arm 71, and a longitudinal groove forming device 72 is provided on the lower surface of the plate 75 (see FIGS. 3 and 4).

The width of the plate 75 (for example, 3,000
6,500 mm) roughly corresponds to the concrete pavement width. The length of the plate 75 in the traveling direction is about 100 to 900 mm.

The fluting device 72 consists of a plurality of beam members 73. As shown in FIG. The beam members 73 are arranged in parallel with the direction of travel of the slip form paver as the axial direction.

As the cross-sectional shape of the beam member, an inverted triangular shape, a circular shape, a semi-circular shape, a flat plate shape, an inverted trapezoidal shape, or the like can be applied.

The beam member 73 has a cross-sectional width of 2 mm to 40 mm and a cross-sectional height of 2 mm to 40 mm. Preferably, the cross-sectional width is between 5 mm and 15 mm and the cross-sectional height is between 5 mm and 15 mm. The length of the beam member 73 is 50-150% of the plate bottom length. More preferably, it is 50 to 100%.

The centers of the beam members 73 are arranged at intervals of 10 mm to 200 mm. Preferably, the centers of the beam members 73 are arranged at intervals of 20 mm to 70 mm.

The beam member 73 may be welded to the bottom surface of the plate 75, or may be mechanically joined. For example, if a screw type is used, replacement is easy, and the cross-sectional shape and size of the beam member can be selected. Alternatively, a groove may be formed in the bottom surface of the plate 75 and the beam 73 may be inserted therein.

The characteristic operation of this embodiment is that the beam member 73 is pressed against the leveling surface by the weight of the plate 75, the plate 75 follows the advance of the slip form paver, and the beam member 73 is leveled while being pressed. It is to move in the direction of travel and to (re)form the flutes 70 .

The beam member 73 is provided on the bottom surface of the plate 75 . At the same time when the plate 75 slides on the leveling surface, the pressing force pushes the beam member 73 onto the leveling surface.

As the slipform paver advances, the beam member 73 moves while remaining pressed against the leveling surface.

A longitudinal groove 70 is (re)formed corresponding to the trajectory of the advancing beam member 73 .

The cross-sectional width of flutes 70 approximately corresponds to the cross-sectional width of beam member 73 , and the depth of flutes 70 approximately corresponds to the cross-sectional height of beam member 73 .

The extension of flute 70 corresponds to the travel distance of beam member 73 . The center-to-center spacing between adjacent flutes 70 corresponds to the center-to-center spacing of beam members 73 .

As a result of positionally controlling the slip form paver, beam member 73 is also positionally controlled via arms 61 and 71 . As a result, vertical grooves 70 are formed at predetermined positions.

Vibration by a vibrator or the like is added during temporary formation of the vertical grooves 50, whereas vibration by a vibrator or the like is not added during the re-forming of the vertical grooves 70. FIG.

~ Effect ~
・Effect 1
In the conventional construction method, the concrete equivalent to the vertical grooves is pushed out onto the pavement surface, lowering the level accuracy of the paved surface (that is, unevenness occurs), and the excess concrete is pushed back into the vertical grooves, reducing the accuracy of the vertical groove shape. I had something to do.

In this embodiment, after the vertical grooves 50 are temporarily formed, the grooves are filled in to ensure the accuracy of the pavement surface level.

When reforming the flutes 70, the aggregate-free and wet mortar component is extruded. Therefore, there is little influence on paved surface level accuracy. In other words, unevenness does not occur.

This improves the paved surface level accuracy.

・Effect 2
A portion 60 corresponding to the vertical groove formed by filling the vertical groove 50 is composed of a mortar component containing no aggregate and containing a large amount of water. As a result, the insertion resistance to the beam member 73 is low. Good flute shape accuracy. The longitudinal grooves 70 can be formed without applying vibration such as a vibrator.

Since there is no vibration such as a vibrator when forming the flutes, the flute shape does not collapse and high accuracy is maintained.

As a result, flute shape accuracy is improved.

・Effect 3
Through the slip form paver position control, beam member 53 and beam member 73 are positioned on the same line in the direction of travel via arms 61 and 71 . As a result, the flutes 50 and 70 are formed at the same position.

By the way, the vertical groove corresponding portion 60 formed by filling the vertical groove 50 is made of a mortar component containing no aggregate and containing a large amount of water. At this time, even if there is some inadequacy in position control, the beam member 73 selects the vertical groove corresponding portion 60 where the insertion resistance is low, and forms the vertical groove 70 .

Furthermore, since the aggregate gathers at the ridges formed between the adjacent longitudinal grooves 50, the difference in insertion resistance from the longitudinal groove-corresponding portion 60 becomes clear, and the beam member 73 selects the longitudinal groove-corresponding portion 60. .

In this manner, accurate flute formation is achieved without requiring excessive position control.

・Effect 4
Aggregate gathers in the ridges 79 formed between the longitudinal grooves 70 that are relatively adjacent to each other, thereby improving the strength. As a result, the shape stability of the vertical grooves 70 is improved.

・Effect 5
In general, the coarse aggregate used for concrete pavement often has a maximum particle size of 40 mm. On the other hand, by setting the maximum particle size of the coarse aggregate to 20 mm or less, the above effects are ensured.

That is, by setting the coarse aggregate to 20 mm or less, the aggregate located at the position corresponding to the vertical groove 50 is not dragged by the beam member 73 and can be easily moved laterally. As a result, the flute-corresponding portions 60 are made of a mortar component containing no aggregate and containing a large amount of water.

～Beam material details～
FIG. 6 is a detailed view of the beam tip shape. It is a perspective view of the same state as the beam mounting. Details of the beam members 53 and 73 will be described.

The tip of the beam member may have a flat shape (see FIG. 6A), but it is more preferable to process it into a conical shape (see FIGS. 6B to 6D) from the viewpoint of reducing insertion resistance.

In FIG. 6B, the pressing surface side is obliquely removed to form a triangular pyramid. It resembles the bow of a ship. In FIG. 6C, the mounting surface side is obliquely removed to form a triangular pyramid. Its shape resembles that of a high-speed train. In FIG. 6D, the pressing surface side and the mounting surface side are obliquely removed to form a quadrangular pyramid. Shaped like a spear.

Beam member 53 and beam member 73 may be the same, but beam member 53 is intended for temporary formation of flutes 50 and beam member 73 is intended for re-formation of flutes 70 and are preferably different.

FIG. 7 is a comparative conceptual diagram of the provisional formation of the flutes 50 and the re-formation of the flutes 70 .

It is preferable that the beam member 53 and the beam member 73 have different cross-sectional dimensions. That is, the cross-sectional dimension of the beam member 73 is one size larger than the cross-sectional dimension of the beam member 53 . For example, the beam member 53 has a width of 8×height 12 mm, while the beam member 73 has an upper width of 15, a lower width of 3×height 15 (mm).

As a result, the beam member 53 reduces the insertion resistance and the driven resistance, while the movement of the beam member 73 ensures a predetermined longitudinal groove dimension.

It is preferable that the beam member 53 and the beam member 73 have different cross-sectional shapes. That is, the cross-sectional shape of the beam member 53 is an inverted triangle, while the cross-sectional shape of the beam member 73 is an inverted trapezoid.

In the beam member 53, the inverted triangular apex bites into the pavement surface to reduce insertion resistance and driven resistance. In addition, in the preceding beam member 53, empirically, the top of the inverted triangle is less likely to be worn. On the other hand, since the beam member 73 does not have a top portion, it is less likely to wear out. Since the beam member 53 has already reduced the insertion resistance and the driven resistance, even if the beam member 73 does not have a top portion, problems related to the insertion resistance and the driven resistance are unlikely to occur.

It is preferable that the beam member 53 and the beam member 73 are made of different materials. That is, compared with the beam member 53, the rigidity of the beam member 73 is higher. For example, pre-hardened steel (PXA30) is used for the beam member 53 and cold work tool steel (SDK11) is used for the beam member 73 .

This improves the wear resistance of the beam member 73 . As a result, replacement frequency is reduced. Also, by using a high-rigidity material only for the beam member 73 and using a low-rigidity material for the beam member 53, it is possible to reduce the manufacturing cost.

As described above, it is possible to improve the problems associated with the replacement of the beam member while suppressing the manufacturing cost. As a result, running costs can be reduced.

The differences between the beam member 53 and the beam member 73 may be combined as appropriate.

- Concrete pavement with longitudinal grooves -
FIG. 8 is a schematic perspective view of a concrete pavement with flutes 70. FIG. The lower left side of the drawing is where the vertical grooves 70 are formed, but for comparison, the upper right side of the drawing is where the vertical grooves 70 are not formed. FIG. 9 is a detailed cross-sectional view of the flutes 70. As shown in FIG.

~Study on the number, size, and cross-sectional shape of longitudinal grooves~
By the way, the applicant of the present application proposed a concrete floor slab having vertical grooves and obtained various findings. Findings obtained from concrete floor slabs having vertical grooves may be applied to this embodiment.

In order to evaluate the vertical groove function in concrete floor slabs, noise value measurement test by rubber plate fall test method, slip resistance test by DFT, on-site water permeability test for confirmation of road drainage amount, surface shape measurement using laser beam scanning A texture depth measurement test and the like were conducted by CTM.

FIG. 10 is an example of evaluation test results relating to the flute function. As a result, it can be seen that there are roughly the following tendencies.

The greater the cross-sectional area of the flutes, the higher the soundproofing effect. Furthermore, the depth direction contributes to the improvement of the soundproofing effect more than the width direction. A U-shape or a rectangular shape that is longer in the depth direction than the width has a high anti-corrosion effect.

Slip resistance (slip suppression) increases in proportion to the groove width. A width of 3 mm is not very effective, and a width of 6 mm or more is preferable.

The greater the cross-sectional area of the flutes, the higher the drainage. However, it was confirmed that the upper measurement limit (calibration value) of the on-site permeability tester can be ensured if the cross-sectional area is about 30 mm 2 . Also, if the cross-sectional area is about 20 mm 2 , it is possible to ensure drainage performance equivalent to that of drainage pavement.

Fig. 11 is based on the results of the evaluation test related to the vertical groove function, and is classified into optimal (○), applicable (△), and unsuitable (×) from the viewpoint of slip suppression, drainage, and soundproofing. is. According to this, it is preferable that the flute width is about 6 to 10 mm, the flute depth is about 6 to 10 mm, and the flute interval is about 20 to 60 mm.

When a similar test was conducted on cast-in-place concrete pavement, the same tendency as the test results on concrete slabs was observed. Therefore, the findings obtained for the concrete floor slab are applied to the vertical grooves 70 of the present embodiment. It is preferable that the flute width is about 2 mm to 40 mm, the flute depth is about 2 mm to 40 mm, and the flute interval is about 10 mm to 200 mm. Further, it is more preferable that the flute width is about 5 mm to 15 mm, the flute depth is about 5 mm to 15 mm, and the flute interval is about 20 mm to 70 mm.

Assuming that the tire width of the automobile is 200 mm and the interval between the vertical grooves 70 is 40 mm, four to five vertical grooves 70 are in contact with each other in the tire width direction. On the other hand, tires are also provided with grooves in the circumferential direction, and there are often 4 to 5 tire grooves. If the tire surface is in contact with the longitudinal grooves 70 and the tire groove is in contact with the ridges 79, a high anti-slip effect can be expected.

~Aggregate Exposed~
At the ridges 79, the mortar component may be removed to expose the aggregate.

Exposed aggregate (rough surface finish) improves slip resistance. Also, the ridges 79 have drainage properties.

Both ends of the ridge portion 79 may be chamfered, and the mortar component may be removed from the chamfered portions to expose the aggregate.

In the flutes 70 (particularly on the side surfaces), the mortar component may be removed to expose the aggregate.

The unevenness caused by the exposure of the aggregate increases the engagement with the tire and further improves the slip control performance.

Particularly in cold regions, the effect of the roughened flutes 70 can be expected to be further improved. The effect of accelerating the wear of black ice burn, which accelerates the wear of ice sticking to the road surface due to contact with the tire while the car is running, is improved. Also, due to the drainage function, there is little floating water on the surface, so it is difficult for ice to form. In addition, as a result of suppressing the outflow of the anti-freezing agent by obstructing the aggregate, the snow-melting effect is maintained. As a result of the increase in the surface area of the sides of the vertical grooves 70, the heat storage effect is improved, and the snow accumulation prevention effect and the snow melting effect are also improved.

In addition, the rough surface finish improves the soundproofing effect.

The sizes of the aggregates are within a specified range, and although the aggregates are arranged evenly to some extent, there are variations. As a result, fricatives of a specific frequency are not generated, and the frequencies of the fricatives vary. As a result, fricatives are expected to interfere with each other. That is, sound insulation is improved.

In particular, it is expected that the fricative sound is irregularly reflected by the aggregate in the vertical groove 70, diffused in the vertical groove 70, and attenuated. That is, sound insulation is improved.

The ridges 79, the chamfers, and the flutes 70 can be easily roughened by washing with water jet or shot blasting, applying a retardant or laying retarder sheets and brushing. The broom finish, which will be described later, also provides a rough surface finish.

~Second Embodiment~
The present invention is not limited to the above embodiments, and various modifications are possible within the scope of the technical idea of the present invention.

FIG. 12 is an outline of a vertical groove forming system according to the second embodiment and a construction situation diagram. FIG. 13 is a schematic diagram of a fluting tool (reforming). 2nd Embodiment changes the plate 75 in 1st Embodiment into the drum 76. FIG.

Further behind the auto-float 62, a drum 76 is provided via an arm 71, and a vertical groove forming device 77 is provided on the peripheral surface of the drum 76. As shown in FIG.

The width of the drum 76 (for example, 3,000
6,500 mm) roughly corresponds to the concrete pavement width. The diameter of the drum 76 is about 200-600mm.

The fluting device 77 consists of a plurality of protruding members 78 . The projecting members 78 are arranged in parallel with the direction of movement of the slip form paver as the axial direction.

As the cross-sectional shape of the projecting member 78, an inverted triangular shape, a circular shape, a semi-circular shape, a flat plate shape, an inverted trapezoidal shape, or the like can be applied.

The cross-sectional width of the protruding member 78 is 2 mm to 40 mm, and the cross-sectional height is 2 mm to 40 mm. Preferably, the cross-sectional width is between 5 mm and 15 mm and the cross-sectional height is between 5 mm and 15 mm. The protruding member 78 may be provided continuously on the peripheral surface of the drum, or may be provided intermittently.

The centers of the convex members 78 are arranged at intervals of 10 mm to 200 mm. Preferably, the centers of the convex members 78 are arranged at intervals of 20 mm to 70 mm.

The characteristic operation of this embodiment is that the convex member 78 is pressed against the leveling surface by the weight of the drum 76, and the drum 76 rotates to follow the advance of the slip form paver, and the convex member 78 is pressed. , the flutes 70 are (re)formed.

The cross-sectional width of the flutes 70 roughly corresponds to the cross-sectional width of the convex member 78 , and the depth of the flute 70 roughly corresponds to the cross-sectional height of the convex member 78 .

The extension of flute 70 corresponds to the distance traveled by projection 78 . The center-to-center spacing between adjacent longitudinal grooves 70 corresponds to the center-to-center spacing between protrusions 78 .

~Third Embodiment~
14 and 15 are an outline of a vertical groove forming system according to the third embodiment and a construction situation diagram. 14 is a plan view and FIG. 15 is a side view.

In the first and second embodiments, the fluting device 72 follows the advancement of one slipform paver, whereas in the third embodiment, the fluting device 82 follows another trailing slip. Mounted on the foam paver, the fluting device 82 follows the advancement of the trailing slip foam paver.

Further behind the auto float 62, the crawler of the later slip form paver runs by itself.

The latecomer slipform paver is modified to include a plate 85 in place of the mold location and a fluting device 82 on the underside of plate 85 .

Since there is no mold, the function of the slip form is lost, but since the basic structure such as crawlers is common with the slip form paver, it is called the slip form paver for convenience.

The fluting device 82 consists of a plurality of beam members 83. As shown in FIG. The beam members 83 are arranged in parallel with the direction of travel of the slip form paver as the axial direction.

A characteristic operation of this embodiment is that the beam member 83 is pressed against the leveling surface by the weight of the plate 85, the plate 85 follows the advance of the subsequent slip form paver, and the beam member 83 is leveled while being pressed. and move in the direction of travel and the flutes 80 are (re)formed.

The plate 85 in the third embodiment may be changed to the drum 76 in the second embodiment.

Both the leading slipform paver and the trailing slipform paver are position-controlled by sensors mounted on both sides in the direction of travel. Sensors for position control are schematically added to FIGS. 14 and 15. FIG.

Thereby, the beam member 53 and the beam member 83 are positioned on the same line in the traveling direction. As a result, the temporarily formed flutes 50 and the reformed flutes 80 are formed at the same position.

In this embodiment as well, even if there is some inadequacy in the position control, the beam member 83 selects the vertical groove corresponding portion 60 where the insertion resistance is low, and forms the vertical groove 80 .

~ Broom finish ~
In FIG. 15 showing the third embodiment, a broom finishing tool 88 is provided further behind the fluting tool 82 .

FIG. 16 is a schematic diagram of a broom finisher. A large number of hard fibers are implanted in the broom finisher 88 .

The broom finisher 88 abuts on the leveling surface, the broom finisher 88 follows the progress of the subsequent slip form paver, and moves in the leveling direction while being in contact with the broom finisher 88, Flutes 80 provide a broom finish to the reshaped concrete pavement.

A mortar component containing a large amount of water is scattered on the concrete pavement surface, and the mortar component is blown away to expose the aggregate.

In addition, even hard fibers have elasticity, and when they come into contact with each other, the ridges 89 are elastically deformed appropriately. expose.

At this time, the boundary between the ridge portion 89 and the vertical groove 80 is chamfered along with the broom finish. The broom finisher 88 also exposes the aggregate at the chamfer.

Thus, in the broom finish of this embodiment, simply by providing the broom finisher 88 behind the fluting tool 82, a plurality of effects can be obtained at once.

The broom finisher 88 may be provided behind the fluting tool 72 of the first embodiment or behind the fluting tool 77 of the second embodiment.

50 Vertical groove (temporary)
51 mold 52 vertical groove forming tool 53 beam member 56 vibrator 57 auger 58 tamper 60 portion corresponding to vertical groove (filling)
61 Arm 62 Autofloat 70 Vertical groove (re-)
71 arm 72 fluting device 73 beam member 75 plate 76 drum 77 fluting device 78 beam member 79 ridge 80 fluting (re)
82 fluting tool 83 beam member 85 plate 88 broom finisher 89 ridge

Claims (8)

A concrete pavement construction method using a slip form pavers,
The bottom surface of the mold of the slip form paver is provided with first vertical groove forming means formed from a plurality of beam members arranged in parallel with the advancing direction as the axial direction,
When forming a concrete pavement with the slip form paver, the first vertical groove forming means is pushed into the pavement surface by the weight of the mold itself,
In a state in which the first vertical groove forming means is pushed into the pavement surface, the first vertical groove forming means is driven in the traveling direction to temporarily form vertical grooves,
An auto-float is provided behind the slip form paver,
The auto float smoothes the paved surface and fills the temporarily formed longitudinal grooves,
A second longitudinal groove forming means is provided outside the slip form paver and behind the auto float,
A concrete pavement construction method, wherein the second vertical groove forming means forms vertical grooves again in the buried vertical groove equivalent locations. the slip form paver provided with the first fluting means has a vibrator;
When the first vertical groove forming means temporarily forms the vertical groove, the vibrator applies vibration,
The second vertical groove forming means does not have a vibrator,
2. The concrete pavement construction method according to claim 1, wherein there is no vibration due to a vibrator when said second vertical groove forming means forms vertical grooves. The concrete pavement construction method according to claim 1, wherein the maximum particle size of coarse aggregate used for the concrete pavement is 20 mm or less. A broom finish means is provided behind the second vertical groove forming means,
2. The concrete pavement construction method according to claim 1, wherein said broom-grain finishing means broom-grain-finishes the pavement surface on which vertical grooves are formed. A concrete pavement fluting system using a slipform paver, comprising:
Formed from a plurality of beam members arranged in parallel with the advancing direction as the axial direction on the lower surface of the mold of the slip form paver,
When forming a concrete pavement with the slip form paver, it is pushed into the pavement surface by the weight of the mold itself,
a first vertical groove forming means for temporarily forming vertical grooves following the traveling direction while being pushed into the paved surface;
an auto-float provided behind the slip form paver for leveling the paved surface and filling the temporarily formed longitudinal grooves;
a second vertical groove forming means provided outside the slip form paver and behind the autofloat for forming vertical grooves again in the buried vertical grooves corresponding to the vertical grooves. Grooving system. 6. The fluting system of claim 5, wherein said second fluting means is provided on a slipform paver separate from said slipform paver. The second vertical groove forming means is provided behind the auto-float,
6. The fluting system according to claim 5, characterized by comprising a plate and a plurality of beam members arranged in parallel on the lower surface of the plate with the advancing direction as the axial direction. The second vertical groove forming means is provided behind the auto-float,
6. The vertical groove forming system according to claim 5, characterized by comprising a rotating drum and a plurality of convex members arranged in parallel on the peripheral surface of the rotating drum with the traveling direction as the axial direction.

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