JP3137475B2 - Pavement of bridge surface and continuous pavement method of bridge surface - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement provided on a bridge of a bridge section on a highway or a general road, and a pavement continuously provided without providing a telescopic device on a pavement surface of the bridge section. The present invention relates to a continuous pavement method for a bridge surface to be formed.

[0002]

2. Description of the Related Art Conventionally, between a bridge girder at an end of a bridge and an abutment,
Alternatively, a telescopic device is widely used between bridge girders. This telescopic device is generally formed of steel or a combination of steel and rubber, and is attached to both sides of the bridge girder and the abutment or the telescopic play between the bridge girder and the bridge girder is subjected to temperature change, concrete creep or drying. Even if the bridge surface expands or contracts due to shrinkage or the like, the continuity of the bridge surface, that is, the running surface of the vehicle or the like is maintained, and a state in which the vehicle can travel safely is maintained.

When such a telescopic device is used, the pavement made of the asphalt mixture applied to the bridge surface becomes discontinuous between the bridge girder and the abutment or between the bridge girder and the bridge girder, and the telescopic device is attached to the bridge surface. It is exposed and forms a part of the vehicle running surface. However, the rapid expansion of traffic on roads in recent years and the increase in the weight of vehicles have resulted in significant damage to the above-mentioned telescopic device. Such breakage of the telescopic device increases the impact when the vehicle is running, generates noise and vibration, has a great effect on the neighborhood, and causes discomfort to the driver of the vehicle. This is a maintenance problem.

As a method of solving such a problem, there has been proposed a continuous pavement construction method for a bridge surface in which a pavement of the bridge surface is continuously provided between a bridge girder and an abutment, and between a bridge girder and a bridge girder.
There is one described in Japanese Patent Publication No. 3-26724.
In this continuous pavement method for a bridge surface, a pavement made of an asphalt mixture is continuously installed on both sides of a bridge girder during expansion and contraction, and waterproofing and crack prevention are performed on a bridge body made of a girder or / and a floor slab. A pavement is formed by laying a sliding sheet using a layer and a metal thin plate, and laminating an asphalt mixture having a net-like stress transmitting member embedded therein.

[0005] When pavement is carried out between the bridge girder and the abutment or in the vicinity of the expansion space between the bridge girder and the bridge girder by such a method, the metal sheet surface of the sliding sheet becomes a smooth surface in the horizontal direction. The bridge and the pavement can slide on the border. Therefore, when the girder expands and contracts and the play changes,
Rather than causing the pavement on the play to undergo the same amount of deformation as the play changes, the strain is distributed to the extent that the pavement on either side of the play is slidably provided on the bridge. That is, FIG.
As shown in FIG. 1, even when the bridge girders 101 and 101 are extended and the play space 104 is narrowed, not only the portion of the pavement 102 above the play space is deformed, but also the area L ₀ where the sliding sheet is laid. And the variation ΔL (ΔL = t ₃ + t ₄ ) in this range is absorbed by the pavement having the entire length of the range L ₀ in which the sliding sheet is laid. Therefore, the pavement 102 is not excessively deformed or stressed extremely, and maintains a flat and durable running surface even when the pavement is continuously formed on both sides of the expansion and contraction play. Can be done.

The net-like stress transmitting member 103 buried in the asphalt mixture transmits the stress acting on the pavement when the girder expands and contracts to the entire area where the sliding sheet is laid. It functions to disperse so as not to generate large stress and to reinforce the layer made of the asphalt mixture.

[0007]

However, the conventional continuous pavement method as described above has the following problems. The pavement made of the asphalt mixture is repeatedly subjected to the wheel load of the vehicle, and causes elastic deformation and plastic flow. As shown in FIG. 12, the asphalt mixture flows laterally due to the wheel load acting on the pavement surface, causing deformation such that the layer thickness of the frequently-loaded portion gradually decreases. Generally, such a phenomenon is likely to occur as the temperature increases, and the deformation in summer becomes a problem. Such deformation is considered to be a combination of surface flow occurring near the surface of the layer made of asphalt mixture, bottom layer flow occurring near the bottom, and middle layer flow occurring near the center of the layer thickness. In the continuous pavement method, there is a problem that the bottom layer has a sliding layer and the flow in the bottom layer is likely to occur because the horizontal constraint is small.

In the conventional continuous pavement method as described above, the mesh-like stress transmitting member 103 embedded in the asphalt mixture may be exposed on the pavement surface. This is because the wheel load due to the running of the vehicle is close to the concentrated load, so that the rigidity of the mesh member exerts a force in the direction of floating on the adjacent portion A of the load position as shown in FIG. It is considered that the above-mentioned phenomenon is caused by a combination of the asphalt-based material flowing under the stress transmitting member 103 and the like due to the flow of the bottom layer caused by the applied load and the accompanying vibration.

The present invention has been made in view of the above problems, and has as its object to provide a bridge which is less likely to undergo plastic deformation and has excellent durability even under a condition where a large wheel load is repeatedly applied. It is to provide a continuous pavement method for surfaces.

[0010]

In order to solve the above-mentioned problems, the invention according to claim 1 is based on an asphalt mixture containing aggregate as a main material, and a bridge body comprising a bridge girder and / or a floor slab. A pavement on a bridge surface provided on a pavement, a sliding layer provided at the bottom of the pavement and capable of sliding in the horizontal direction with respect to the bridge, A mesh member that cannot pass through at least a part of the aggregate contained in the mixture, and a mesh member having a large number of vertical openings large enough to allow passage of all of the aggregate contained in the asphalt mixture, A stress transmitting member disposed on the upper side of the mesh and embedded in the asphalt mixture, wherein the mesh and the stress transmitting member are connected so as to restrain relative displacement in the vertical direction. Shall be.

According to a second aspect of the present invention, there is provided a pavement for a bridge surface, which is mainly composed of an asphalt mixture containing an aggregate and is installed on a bridge composed of a bridge girder and / or a floor slab. A sliding layer provided at the bottom of the body and capable of sliding horizontally with respect to the bridge body; and a sliding layer disposed above the sliding layer and unable to pass at least a part of the aggregate contained in the asphalt mixture. A net-like member, a net-like member having a large number of vertical openings sized to allow all of the aggregate contained in the asphalt mixture to pass therethrough, disposed above the net-like body and embedded in the asphalt mixture. And a holding member having a plate-like portion arranged substantially horizontally and joined to the stress transmitting member.

According to a third aspect of the present invention, in the pavement of the bridge surface according to the first or second aspect,
The stress transmitting member is a net-like member that is formed by bending a steel plate having a width in the vertical direction in the horizontal direction and forming a polygonal column-shaped through hole partitioned into a honeycomb shape.

According to a fourth aspect of the present invention, in the pavement of the bridge surface according to the first, second, or third aspect, the sliding layer is formed of a thin metal layer or a synthetic resin film. A surface forming layer and a sliding sheet slidable in contact with the smooth surface forming layer are laid one on top of the other, allowing horizontal sliding between the smooth surface forming layer and the sliding sheet. I do.

According to a fifth aspect of the present invention, there is provided a continuous pavement method for a bridge surface in which an asphalt mixture containing an aggregate is used and pavement is installed near a stretchable space of a bridge body made of a bridge girder and / or a floor slab. On either side of the bridge body, one of a smooth surface forming layer made of a thin metal layer or a synthetic resin film or a sliding sheet that can slide in contact with the smooth surface forming layer was attached to the upper surface. A flexible sheet-like lower sheet material is laid, and on the upper side, the other of the smooth surface forming layer or the sliding sheet is attached to the lower surface,
Laminating an upper layer sheet material made of asphalt-based material in which at least a part of the aggregate cannot embed a reticulated body,
Furthermore, on the upper side, a stress transmitting member having a large number of openings large enough to allow the aggregate contained in the asphalt mixture to pass is laid, and the mesh body and the stress transmitting member are vertically displaced relative to each other. After binding to bind,
An asphalt mixture containing aggregate is laminated from above the stress transmitting member so as to embed the stress transmitting member.

According to a sixth aspect of the present invention, there is provided a continuous pavement method for a pavement in which a pavement is installed in the vicinity of a stretching space of a bridge body made of a bridge girder and / or a floor slab using an asphalt mixture containing aggregate. On either side of the bridge body, one of a smooth surface forming layer made of a thin metal layer or a synthetic resin film or a sliding sheet that can slide in contact with the smooth surface forming layer was attached to the upper surface. A flexible sheet-like lower sheet material is laid, and on the upper side, the other of the smooth surface forming layer or the sliding sheet is attached to the lower surface,
Laminating an upper layer sheet material made of asphalt-based material in which at least a part of the aggregate cannot embed a reticulated body,
Further on the upper side, a net-like member joined by forming a steel plate having a width in the vertical direction in a horizontal direction and forming a polygonal column-shaped through hole partitioned into a honeycomb shape, wherein the through hole is asphalt. Laying a stress transmitting member large enough to pass through all of the aggregate contained in the mixture, joining a presser fitting having a plate portion to the stress transmitting member so that the plate portion is substantially horizontal, Thereafter, an asphalt mixture containing aggregate is laminated from above the stress transmitting member so as to embed the stress transmitting member.

In the pavement of the bridge surface according to any one of claims 1 to 3, the sliding layer lays a sheet-like member substantially horizontally between the upper surface of the bridge body and the pavement or near the bottom of the pavement. In this case, it is preferable that two sheet-like members are layered, and that the sliding in the horizontal direction is allowed between the two sheet-like members. Further, lubricating oil or the like may be applied between the sheet-like members. It is desirable that the material used for the surface of the sheet-like member has a small coefficient of friction against sliding.Select an appropriate material such as a thin metal layer, a metal foil, a thin metal plate, a synthetic resin film, paper, cloth, and a nonwoven fabric. Can be. However, in the case where two sheet-shaped members are used in layers, it is desirable to use different types of materials in combination in order to obtain an effect of reducing the friction coefficient.

In the bridge pavement according to the fourth aspect, the thin metal layer used for the smooth surface forming layer may be a thin plate or foil of aluminum or stainless steel.
Also, a material obtained by depositing aluminum or the like on a synthetic resin film may be used. The material of the synthetic resin film used as the smooth surface forming layer can be selected from polyethylene, polypropylene and the like. On the other hand, as the sliding sheet, a sheet made of a thin metal layer or a synthetic resin film can be used similarly to the above-mentioned smooth surface forming layer. However, it is desirable to avoid using the same material as the smooth surface forming layer, and to combine materials made of different materials.

The pavement of the bridge surface or the mesh used in the continuous pavement method of the bridge surface according to any one of the first to sixth aspects,
A steel wire, a stainless steel wire, or a wire made of another metal wire can be used. Further, a high-tension fiber such as glass fiber or carbon fiber may be used.

The stress transmitting member used in the pavement body for a bridge surface or the continuous pavement method for a bridge surface according to the first, second or fifth aspect of the present invention is formed by forming a metal or a high-tensile fiber or the like into a mesh. It can be used, in addition to a net-like member joined so as to form a polygonal column-shaped through hole that is formed by bending a steel sheet having a width in the vertical direction in the horizontal direction and dividing into a honeycomb shape, as well as intermittent cutting lines in the steel sheet A so-called expanded metal, welded wire mesh, or the like, which is formed into a mesh by stretching, can be used. Further, in the stress transmitting member joined so as to form the polygonal column-shaped through hole as described above, it is desirable to appropriately provide an opening in a steel plate partitioning the through hole.

In the above-mentioned pavement of the bridge surface according to the first aspect, the means for connecting the net-like body and the stress transmitting member may be bound by a wire, or a bolt and a fitting for connection may be used. It may be something.

[0021] In the pavement body for a bridge surface according to the second aspect or the continuous pavement method for a bridge surface according to the sixth aspect, the holding member is locked so as to prevent the stress transmitting member from floating. Or may be fixed to the stress transmitting member by welding or the like.

The lower layer sheet member used in the continuous pavement method for a bridge surface according to claim 5 or 6 is, for example, one of a nonwoven fabric impregnated with an asphalt-based material, an asphalt-based material formed in a sheet shape, and the like. To which a smooth surface forming layer or a sliding sheet is attached. The asphalt-based material is preferably a material having high flexibility and good stretchability, and a rubber asphalt compound obtained by adding rubber to asphalt and further adding fats and oils can be used. On the other hand, since the upper layer sheet also embeds the net-like body, it is desirable to use asphalt-based material as the main material.

[0023]

In the pavement of the bridge according to the first aspect of the present invention, the bridge and the upper part of the pavement can be slid in the horizontal direction by the sliding layer. Even if such a pavement is continuously provided over the bridge and the play changes, the pavement slides on the bridge body, and the horizontal strain and stress are dispersed and excessive deformation occurs at the upper part of the expansion and contraction play. And no stress. The stress transmitting member embedded in the asphalt mixture transmits the force acting on the pavement to a wide range when the play changes as described above,
Extremely large stress is prevented from acting. Therefore, even if the pavement is continuously provided on both sides of the play, a durable flat road surface is maintained. Further, the layer made of the asphalt mixture is reinforced by the stress transmitting member,
The durability against the wheel load that acts repeatedly is improved.

On the other hand, on the upper side of the sliding layer provided near the bottom of the layer made of the asphalt mixture, a mesh having a relatively fine mesh that cannot pass at least a part of the aggregate contained in the asphalt mixture is provided. This reticulation is integrated with the asphalt mixture and prevents the asphalt mixture near the bottom of the pavement from flowing horizontally. Further, since the mesh body is bound so as not to move in the vertical direction with the stress transmitting member, the distance between them is always kept constant, and the flow of the asphalt mixture from the middle layer to the bottom layer is effectively prevented. This reduces the deformation of the pavement, such as the formation of so-called "ruffles".

Further, since the mesh cannot pass through at least a part of the aggregate, it does not rise to the upper layer of the pavement, and the stress transmitting member is bound to the mesh to form the stress transmitting member. Floating near the body surface is prevented.

[0026] In the pavement of the bridge surface according to the second aspect of the present invention, a slip layer is provided at the bottom of the pavement as in the case of the pavement of the bridge surface according to the first aspect of the present invention. Since the stress transmission member is buried, even if this pavement is provided continuously over both sides of the expansion and contraction, excessive deformation and stress do not occur on the pavement near the expansion and contraction,
A durable flat road surface is maintained. In addition, the mesh is integrated with the asphalt mixture, and the flow in the horizontal direction near the bottom of the pavement is prevented.

Since the holding member joined to the stress transmitting member has a plate-like portion arranged substantially horizontally, it comes into contact with the asphalt mixture laminated on the upper side, and holds the stress transmitting member from rising. Play a role. Therefore, the pavement is prevented from floating on the surface. In addition, by preventing the holding member from being lifted, the stress transmitting member having the effect of preventing the middle layer from flowing is always kept at the same interval as the mesh member laminated thereunder. Therefore, the effect of preventing the flow of the asphalt mixture possessed by the stress transmitting member and the mesh is combined, the flow from the middle layer to the bottom layer is effectively prevented, and the deformation of the pavement subjected to repeated wheel loads is reduced.

According to the third aspect of the present invention, the first aspect is provided.
Or, the stress transmitting member in the pavement of the bridge surface according to claim 2, horizontally bending a steel plate having a width in the vertical direction,
Since it is a mesh-like member joined so as to form a polygonal column-shaped through hole partitioned into a honeycomb shape, the asphalt mixture can be filled into the polygonal column-shaped through hole, and can be rolled with a roller or the like, and asphalt It is easy to perform the work so that the mixture and the stress transmitting member are integrated. Moreover, the through-hole has a polygonal column shape surrounded by a steel plate having a width in the vertical direction, so that the flow of the asphalt mixture is prevented, and the deformation of the pavement body is reduced.

[0029] According to the fourth aspect of the present invention, the first aspect is provided.
The pavement of the bridge surface according to any one of claims 1 to 3, wherein the sliding layer is a sliding surface forming layer made of a thin metal layer or a synthetic resin film, and a sliding sheet capable of sliding in contact with the sliding surface forming layer. It is laid one on top of the other, allowing horizontal sliding between them, which facilitates construction and reduces the coefficient of friction on the sliding surface, ensuring reliable sliding between the bridge and pavement. And the stress acting on the pavement is reduced.

In the method for continuously paving a bridge surface according to the invention as set forth in claim 5, the lower sheet material having one of a smooth surface forming layer and a sliding sheet adhered to the upper surface is provided on both sides of the bridge during expansion and contraction. The sliding layer having a small coefficient of friction can be easily formed because the sliding sheet or the upper layer sheet material on which the other of the sliding surface forming layer is stuck on the lower surface is laid on the upper surface of the body and the other of the sliding sheet and the smooth surface forming layer is laid on the upper surface.

Further, by embedding the mesh in an upper sheet material made of an asphalt-based material manufactured in advance at the factory, the mesh can be laid at the same time as the formation of the sliding layer, thereby improving the working efficiency. Furthermore, since the upper layer sheet material is made of an asphalt-based material, the heated asphalt mixture is spread over and adhered to the asphalt mixture when the asphalt mixture was compacted and compacted. By embedding the mesh, the mesh can be disposed at a position substantially constant from the sliding layer, and a uniform bottom layer flow preventing effect can be obtained.
Further, since the mesh and the stress transmitting member are bound together, in the completed pavement, the stress transmitting member is prevented from floating near the pavement surface.

According to the sixth aspect of the present invention, the stress transmitting member is joined so as to form a polygonal column-shaped through hole partitioned into a honeycomb shape, and a sufficient amount of asphalt mixture is filled in the through hole. It can be filled, compacted by rolling, and constructed such that the asphalt mixture and the stress transmitting member are integrated.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a pavement on a bridge surface according to an embodiment of the present invention. The pavement on the bridge surface is a pavement provided on the upper surface of a bridge 1 made of concrete. A first rubber asphalt compound layer 2 is laid in contact with the concrete surface, and an aluminum foil is coated with a polyester film thereon. The smooth surface forming layer 3 reinforced by the above is laminated. A sliding sheet 4 in which a polyester film is adhered to a nonwoven fabric is laid on the smooth surface forming layer 3, and a second rubber asphalt compound layer 5 is laminated thereon. In this second rubber asphalt compound layer 5, a steel wire mesh 6 is embedded substantially horizontally.

Second rubber asphalt compound layer 5
A base layer 8 of an asphalt mixture containing aggregate
In the base layer 8, a mesh-shaped stress transmitting member 7 formed by joining a belt-shaped steel plate material is embedded. The stress transmitting member 7 is bound to the steel wire mesh 6 in the second rubber asphalt compound layer 5 by a wire 10 at a predetermined interval. A surface layer 9 made of an asphalt mixture is further provided on the base layer 8, and the upper surface thereof becomes a running surface of a vehicle or the like.

As shown in FIG. 1 (b), such a pavement is provided in a range of length L on both sides of the expansion and contraction between the two bridges 1, 1 and at both ends of this range. The stress transmitting member 7 is fixed to the bridge body 1 with an anchor 13.
In addition, a backup material 11 and a joint material 12 that allow a large deformation are interposed between the bridges in the telescopic play area.

FIG. 2 shows the sliding layer of the pavement on the bridge surface,
FIG. 2 is an enlarged view showing a rubber asphalt compound layer, a second rubber asphalt compound layer, and a net of the present invention. The first rubber asphalt compound layer 2 has flexibility, and can be laid so as to be in close contact by pressing even if there are some irregularities on the upper surface of the bridge body. The smooth surface forming layer 3 is attached to the upper surface of the first rubber asphalt compound layer 2 and is formed by bonding an aluminum foil and a polyester film for reinforcing the aluminum foil, and the aluminum foil becomes a surface (upper surface). It is pasted as follows.

The sliding sheet 4 is formed by laminating a polyester film on a nonwoven fabric, and the nonwoven fabric side is adhered to the lower surface of the second rubber asphalt compound layer 5 with the polyester film on the lower side. Second
The rubber asphalt compound layer 5 is rich in flexibility like the first rubber asphalt compound layer 2, and a steel wire mesh 6 is buried substantially in the center of the layer thickness. This steel wire mesh has a wire diameter of 0.3 to 0.5
mm and a mesh size of about 5 mm is used.

On the upper surface of the second rubber asphalt compound layer 5, a mineral substance 14 such as silica sand is adhered. When the base layer 8 is applied on the second rubber asphalt compound layer 5, the mineral powder 14 is taken into the heated asphalt mixture and adheres to the second rubber asphalt compound layer 5 and the base layer 8. Is to strengthen.

FIG. 3 is a perspective view showing the stress transmitting member 7 embedded in the base layer 8 made of the asphalt mixture. The stress transmitting member 7 is formed by bending a steel sheet having a width in the vertical direction in the horizontal direction, and combining a large number of such steel sheets. The hexagonal column-shaped space partitioned by the steel sheets has a honeycomb shape in the plane direction. Are arranged without gaps, and are continuously formed in a net shape. This stress transmitting member 7 is formed as follows.

A strip-shaped steel sheet having a width of about 20 mm
It bends at about 60 degrees at two places at 0 mm intervals, and at the next two places it is bent at about 60 degrees in the opposite direction, and processing is repeated. A number of such strip-shaped steel sheets are arranged in parallel with the width direction up and down, and adjacent steel sheets are joined to each other so as to form a substantially regular hexagon on a plane. The joining method may be welding, or a method in which an opening 7a is provided in a strip-shaped steel sheet as shown in FIG. 3, the steel sheets to be joined are overlapped and punched, and the opening is joined by deformation of the periphery of the opening. Good. Such a stress transmitting member 7 is provided on the second rubber asphalt compound layer, and transmits the wire 10 locked to the mesh body 6 buried in the second rubber asphalt compound layer 5 to the stress transmitting member. Member opening 7
By binding through a, the gap is prevented from expanding in the vertical direction.

The base layer 8 laminated so as to embed the stress transmitting member 7 is made of an asphalt mixture obtained by mixing asphalt with a material appropriately selected from crushed stone, gravel, sand, filler and the like as an aggregate. is there. The aggregate is appropriately mixed with gravel, sand, and the like, and adjusted to a particle size distribution according to road traffic, environment, workability, and the like. In addition, petroleum asphalt can be used as the asphalt, and natural asphalt may be used according to requirements such as workability. Surface layer 9
The asphalt mixture used in the above can be formed by selecting a material so as to be appropriate in the same manner as the above-mentioned base layer.

In such a pavement on the bridge surface, even when the bridge body expands or contracts due to a temperature change or the like, no large deformation or stress is generated in the portion between the expansion and contraction play.
That is, since the pavement can be slid without being restrained by the bridge by the sliding layer provided at the bottom of the pavement, the length change ΔL of the range L where the pavement of the present embodiment is provided is provided. On the other hand, deformation and stress are dispersed in the entire range of the length L, and a state suitable for running of a vehicle or the like is maintained without excessive deformation or cracking on the pavement surface. In particular, in this embodiment, since the sliding layer overlaps the aluminum foil and the polyester film and slides between them, the coefficient of friction is small and the dispersibility of stress is good. Further, since the stress transmitting member 7 is formed into a net shape by joining strip-shaped steel sheets having a width in the vertical direction, the stress transmitting member 7 is easily integrated with the asphalt mixture, and a force is applied so that a large stress is not locally generated in the asphalt mixture. Can be transmitted.
Further, the effect of reinforcing the base layer 8 made of the asphalt mixture and preventing breakage is great.

In the pavement of the bridge surface according to the present embodiment, the relatively fine mesh member 6 is disposed above the sliding layer and is integrated with the asphalt mixture, so that the bottom of the pavement is restrained by the bridge. However, bottom flow is effectively prevented. Furthermore, since the stress transmitting member 7 is made of a strip-shaped steel plate, the middle layer can be prevented from flowing, and the stress transmitting member 7 and the mesh member 6 are bound together, and the mesh member 6 and the stress transmitting member 7 are always connected. Since the spacing is maintained uniformly, the flow from the middle layer to the bottom layer is effectively prevented. In addition, since the mesh body and the stress transmitting member 7 are bound, even if the wheel load is repeatedly applied, the stress transmitting member 7 is prevented from rising to the surface side.

FIG. 4 is a sectional view showing a pavement on a bridge surface according to a first embodiment of the present invention. The pavement on the bridge surface has a first rubber asphalt compound layer 32, a smooth surface forming layer 33, and a sliding sheet 3 similar to those shown in FIG.
4, a second rubber asphalt compound layer 35, a mesh 36, a stress transmitting member 37, a base layer 38, and a surface layer 39. However, in the present embodiment, the stress transmitting member 37
5 is not bound with the net-like body 36, and as shown in FIG. 5, a holding member 40 made of a steel plate piece abuts on the lower edge of the stress transmitting member 37 at a predetermined interval, and is individually attached to the stress transmitting member 37 by welding. Have been.

In such a pavement on the bridge surface, the holding member 40 fixed to the lower edge of the stress transmitting member 37 projects substantially horizontally, and the upper surface of the projecting portion is in contact with the asphalt mixture. It is possible to prevent the transmission member 37 from being lifted upward, and the distance between the transmission member 37 and the mesh body is maintained substantially the same. Therefore, the effect of dispersing the stress on the expansion and contraction of the bridge body and the effect of preventing the bottom layer flow and the middle layer flow are the same as those in the embodiment shown in FIG.

FIG. 6 is a sectional view showing a pavement on a bridge surface according to a second embodiment of the present invention. Also in this pavement, a first rubber asphalt compound layer 52, a smooth surface forming layer 53, and a sliding sheet 5 similar to those shown in FIG.
4, a second rubber asphalt compound layer 55, a net-like body 56, a stress transmitting member 57, a base layer 58, and a surface layer 59. In this embodiment, the stress transmitting member 57 is not bound with the mesh body 56, and as shown in FIG. 7, both ends of a long plate material are divided into two and a presser bent into an arc shape. An opening 5 provided in a strip-shaped steel plate material constituting the stress transmitting member 57
Both ends are inserted and locked in 7a.

At this time, the upper surface of the central portion of the holding member 60 contacts the asphalt mixture laminated so as to embed the stress transmitting member 57. Therefore, the lifting of the stress transmitting member 60 by the holding member 57 is prevented.
In addition, the dispersion effect of stress on the expansion and contraction of the bridge girder, bottom layer flow,
The effect of preventing the middle layer flow is the same as that of the embodiment shown in FIG.

FIG. 8 is a sectional view showing a pavement on a bridge surface according to a third embodiment of the present invention. Also in this pavement, a first rubber asphalt compound layer 72, a smooth surface forming layer 73, and a sliding sheet 7 similar to those shown in FIG.
4. It has a second rubber asphalt compound layer 75, a mesh body 76, a base layer 78 and a surface layer 79. In this embodiment, as a stress transmitting member, an intermittent cutting line is parallel to a steel plate as shown in FIG. , And a so-called expanded metal 77 which is stretched into a net shape is used. Since the expanded metal 77 has a small thickness in the vertical direction, it is necessary to arrange the expanded metal 77 at a position in the base layer 78 where stress can be transmitted effectively.
, A bolt 81, two nuts 82 screwed to them, and a support bracket 83 sandwiched between them, and are supported at a predetermined height.

In such a pavement on the bridge surface, the bolt 81
The upper surface of the presser fitting 80 fixed to the lower end of the expanded metal 77 is in contact with the asphalt mixture, and the vertical position of the expanded metal 77 connected to the presser fitting 80 is maintained without change. Floating on the surface side is prevented, and flow from the middle layer to the bottom layer is effectively prevented. It also has the effect of dispersing stress with respect to the expansion and contraction of the bridge girder.

FIG. 10 shows a method of processing the expansion play between the bridge girders when the expansion play is large. If the expansion and contraction space is large, the pavement may be deformed only with a soft backup material or the like, and in order to prevent this, a cutout is provided at the end of the bridge body, and a bridge fitting 9 is provided between the bridge bodies in this portion.
0 is erected. On top of this a soft asphalt mixture 91
, And finished to the same height as the upper surface of the bridge body, on which the pavement body of the bridge surface according to the present invention is installed, and can be applied to any of the embodiments described above. In addition, the delivery metal fitting 90 is, for example, Japanese Patent Publication No. 2-26.
No. 004 can be used.

Next, a continuous paving method for a bridge surface according to an embodiment of the present invention will be described with reference to FIG. First, the backup material 11 and the joint material 12 are loaded between the bridges formed of the bridge girder and / or the floor slab and the adjacent bridges, and finished to a plane having the same height as the upper surface of the bridge. A lower sheet material is laid on this. The lower sheet material is manufactured in a factory, and has a smooth surface forming layer attached to one surface of a soft rubber asphalt compound layer, and a release paper attached to the other surface. By peeling off the release paper and pressing its surface against the upper surface of the bridge body, it can be easily brought into close contact.

An upper sheet material is laid on the lower sheet material. This upper layer sheet material was also manufactured at the factory, and a reticulated body was embedded in a flexible rubber asphalt compound layer, and a sliding sheet in which a polyester film and a nonwoven fabric were bonded to one side was bonded. I have.
In addition, silica sand is adhered to the other surface, which limits the adhesive force of the rubber asphalt compound layer and facilitates handling. Since such an upper sheet material is manufactured at a factory, it is easy to finish it uniformly, and the net-like body is arranged at substantially the same interval as the sliding sheet forming the sliding layer at any position in the plane. .

The stress transmitting member 7 is arranged on the upper layer sheet material, and is fixed to the bridge body by the anchors 13 driven into the bridge body 1 at both ends of the pavement construction area. Subsequently, the wire is held at the tip of a sharp needle-shaped jig, and the wire 10 is engaged with the net 6 in the rubber asphalt compound layer. This wire is connected to the stress transmitting member 7, and the stress transmitting member 7 and the mesh body 6 are connected so as not to cause relative displacement in the vertical direction. Thereafter, the heated asphalt mixture is spread so as to embed the stress transmitting member 7 and is rolled by a roller to form the base layer 8. Further, an asphalt mixture is laminated thereon to form a surface layer 9.

When the pavement of the bridge surface is formed as described above, the upper layer sheet material and the lower layer sheet material are manufactured in the factory. A mesh body for preventing bottom layer flow can be appropriately arranged.

In a method for continuously paving a bridge surface according to an embodiment of the invention as set forth in claim 6, the method for constructing a pavement body for a bridge surface shown in FIG. The first rubber asphalt compound layer 52, the sliding layer, and the second rubber asphalt compound layer 55 are formed with the upper sheet material. After placing and laying the stress transmitting member 57 on the upper layer sheet material, the holding member 60 shown in FIG. 7 is locked at a predetermined interval. Thereafter, a base layer and a surface layer of the asphalt mixture are formed in the same manner as in the above construction method.

[0056]

As described above, in the pavement of the bridge surface according to the first to fourth aspects of the present invention, the slip layer is provided at the bottom and the stress transmitting member is embedded in the asphalt mixture. Therefore, even if the pavement is continuously provided on both sides during the expansion and contraction, excessive deformation and stress do not occur, and a durable pavement can be obtained. In addition, since the relatively fine mesh network is disposed above the sliding layer, the flow of the asphalt mixture in the bottom layer portion is prevented. Further, since the stress transmitting member is prevented from rising upward, the action of the stress transmitting member for preventing the flow of the asphalt mixture in the middle layer portion in the base layer and the action of the mesh for preventing the flow of the bottom layer portion are combined. In the bottom layer, the asphalt mixture can be effectively prevented from flowing in the horizontal direction, and the deformation of the pavement can be reduced. In addition, it is possible to prevent the stress transmitting member from rising to the surface side of the pavement and prevent the pavement from being broken.

In the continuous pavement method for a bridge surface according to the fifth or sixth aspect of the present invention, the formation of the sliding layer and the disposition of the mesh are performed by laying the lower sheet material and the upper sheet material. The bridge pavement according to any one of claims 1 to 4, wherein the sliding layer has a small coefficient of friction.
It is possible to easily obtain a pavement on a bridge surface on which a net is appropriately disposed.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a pavement on a bridge surface according to an embodiment of the present invention.

FIG. 2 is an enlarged view showing a configuration near a bottom of a pavement on a bridge surface according to the embodiment.

FIG. 3 is a perspective view showing a stress transmitting member used in the embodiment.

FIG. 4 is a schematic sectional view showing a pavement on a bridge surface according to a first embodiment of the present invention.

FIG. 5 is a perspective view showing a stress transmitting member and a holding member used in the pavement on the bridge surface of the embodiment shown in FIG. 4;

FIG. 6 is a schematic sectional view showing a pavement on a bridge surface according to a second embodiment of the present invention.

FIG. 7 is a perspective view showing a stress transmitting member used in the pavement on the bridge surface of the embodiment shown in FIG. 6;

FIG. 8 is a schematic sectional view showing a pavement on a bridge surface according to a third embodiment of the present invention.

FIG. 9 is a perspective view showing a stress transmitting member used in the pavement on the bridge surface of the embodiment shown in FIG. 8;

FIG. 10 is a cross-sectional view schematically showing a configuration in a case where the pavement of the bridge surface according to any one of claims 1 to 4 is provided on both sides of a telescopic play.

FIG. 11 is an explanatory view showing a configuration when pavements are continuously provided on both sides of a telescopic play.

FIG. 12 is an explanatory diagram showing a flow of asphalt in a conventional pavement on a bridge surface.

FIG. 13 is an explanatory diagram showing a problem in a conventional pavement on a bridge surface.

[Explanation of symbols]

1,31,51,71 Bridge body (concrete) 2,32,52,72 First rubber asphalt compound layer 3,33,53,73 Smooth surface forming layer 4,34,54,74 Sliding sheet 5,35 , 55, 75 Second rubber asphalt compound layer 6, 36, 56, 76 Reticulated body 7, 37, 57, 77 Stress transmitting member 8, 38, 58, 78 Base layer 9, 39, 59, 79 Surface layer 10 Binding wire 11 Backup material 12 Joint material 13 Anchor 14 Mineral powder (silica sand)

Claims (6)

(57) [Claims] 1. A pavement of a bridge surface mainly comprising an asphalt mixture containing an aggregate and provided on a bridge composed of a bridge girder and / or a floor slab, provided at the bottom of the pavement. A sliding layer capable of sliding in the horizontal direction with respect to the bridge body; a mesh body disposed above the sliding layer and not passing at least a part of the aggregate contained in the asphalt mixture; A mesh member having a large number of vertical openings sized to allow all of the aggregate contained in the mixture to pass therethrough, the stress transmitting member being disposed above the mesh member and embedded in the asphalt mixture. And a pavement body for a bridge surface, wherein the mesh body and the stress transmitting member are connected so as to restrain relative displacement in a vertical direction. 2. A pavement for a bridge surface which is mainly composed of an asphalt mixture containing an aggregate and is provided on a bridge composed of a bridge girder and / or a floor slab, provided at the bottom of the pavement. A sliding layer capable of sliding in the horizontal direction with respect to the bridge body; a mesh body disposed above the sliding layer and not passing at least a part of the aggregate contained in the asphalt mixture; A mesh member having a large number of vertical openings sized to allow all of the aggregate contained in the mixture to pass therethrough, the stress transmitting member being disposed above the mesh member and embedded in the asphalt mixture. A pavement body for a bridge surface, comprising: a plate-like portion arranged substantially horizontally, and a holding member joined to the stress transmitting member. 3. The pavement of a bridge surface according to claim 1, wherein the stress transmitting member is formed by bending a steel plate having a width in a vertical direction in a horizontal direction, and is partitioned into a honeycomb shape. A pavement on a bridge surface, which is a net-like member joined so as to form a polygonal column-shaped through hole. 4. The pavement body for a bridge surface according to claim 1, 2 or 3, wherein the sliding layer is formed of a metal thin layer or a synthetic resin film, and A bridge, wherein a sliding sheet slidable in contact with the surface forming layer is laid on top of one another, and horizontal sliding is allowed between the sliding surface forming layer and the sliding sheet. Surface pavement. 5. A continuous pavement method for a pavement using an asphalt mixture containing an aggregate and providing pavement near an extension play of a bridge body made of a bridge girder and / or a floor slab, comprising: On the bridge body upper surface, either a smooth surface forming layer made of a thin metal layer or a synthetic resin film, or a sliding sheet that can slide in contact with the smooth surface forming layer, is attached to the upper surface of a flexible sheet. A lower layer sheet material is laid, and on the upper side, the other of the smooth surface forming layer or the sliding sheet is affixed to the lower surface, and an asphalt-based material in which a mesh body through which at least a part of the aggregate cannot pass is embedded. The upper layer sheet material is laminated, and further on the upper side, a stress transmitting member having a large number of openings large enough to allow the aggregate contained in the asphalt mixture to pass is laid, and the mesh member and the stress transmitting member To After binding so as to restrain the relative displacement in the vertical direction, asphalt mixture containing aggregate is laminated from above the stress transmitting member so as to embed the stress transmitting member. Construction method. 6. A continuous pavement construction method for a pavement using an asphalt mixture containing an aggregate and providing pavement near an extension play of a bridge body made of a bridge girder and / or a floor slab, comprising: On the bridge body upper surface, either a smooth surface forming layer made of a thin metal layer or a synthetic resin film, or a sliding sheet that can slide in contact with the smooth surface forming layer, is attached to the upper surface of a flexible sheet. A lower layer sheet material is laid, and on the upper side, the other of the smooth surface forming layer or the sliding sheet is affixed to the lower surface, and an asphalt-based material in which a mesh body through which at least a part of the aggregate cannot pass is embedded. An upper layer sheet material is laminated, and further on the upper side, a steel plate having a width in the vertical direction is horizontally bent, and a mesh-like member joined so as to form a polygonal column-shaped through hole partitioned into a honeycomb shape. And said A stress transmitting member having a size such that the through hole can pass through all of the aggregate contained in the asphalt mixture is laid, and a presser fitting having a plate-like portion is provided by the stress transmitting member so that the plate-like portion is substantially horizontal. And then laminating an asphalt mixture containing aggregate so as to embed the stress transmitting member from above the stress transmitting member.