JP2014080853A - Construction method of resin pavement body in road joint part, and road joint part structure comprised of resin pavement body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method of a resin pavement body in a road joint part of a paved road with reduced noise, capable of being easily repaired and suppressing crack of a pavement part, and a road joint part structure comprised of the resin pavement body.SOLUTION: An asphalt pavement 4 is excavated to form a belt-like unpaved part 11 as shown in Figure 1(b). Then, an edge cutting layer 14 having a width (W3) smaller than the width W1 of the unpaved part 11 is provided on both floor slabs (3) so as to straddle a joint at the center in the width direction of the unpaved part as shown in Figure 1(d). Next, a first pavement material 15 containing a resin and having a relatively low elastic modulus during hardening is filled under the unpaved part 11 to bond it to a floor slab part exposed from the edge cutting layer 14 as shown in Figure 1(e). Thereafter, a second pavement material 16 having an elastic modulus during hardening higher than that of the first pavement material 15 and containing a resin is filled as shown in Figure 1(f).

Description

  The present invention relates to a method for constructing a resin pavement in a road joint such as a bridge joint or a joint of a concrete floor slab, and a road joint structure comprising the resin pavement, and to suppress cracks in the road joint. Regarding technology.

  For highways and ordinary roads, in addition to general asphalt pavement parts composed of earth roadbed (roadbed), roadbed and asphalt pavement, bridges, viaducts, composite pavements, etc., the roadbed is made of floor slabs such as concrete slabs There is a part that is composed. In composite paved roads, reinforced concrete slabs (hereinafter referred to as “concrete slabs”) having a predetermined size and shape that constitute the floor slab are continuously laid on the road floor, and asphalt concrete (hereinafter simply referred to as asphalt) on these concrete slabs. It is a road that has been paved, and has both the structural durability of a concrete paved road and the good running performance of an asphalt paved road (see Patent Documents 1 and 2).

  In such an asphalt pavement including a floor slab, the floor slab expands and contracts due to changes in temperature, so avoid cracks in the asphalt pavement at road joints (that is, joints such as floor gaps). I can't. Therefore, in bridges and viaducts, for example, a load-supporting joint structure in which an expansion / contraction device composed of a pair of comb-shaped metal plates exhibiting a complementary shape is attached to the floor slab along the surface of the asphalt pavement ( Patent Document 3), a butt-type joint part structure in which a rubber-like sealing material is installed in the floor slab joint part, a gap plate is installed so as to straddle the joint, and a buried type in which a special composite material is provided thereon Various joint part structures such as joint part structures have been put to practical use. In composite paved roads, a construction method that does not reveal cracks by providing induction joints in the asphalt pavement of the floor slab joint, and a construction method that injects a repair material into the generated cracks are performed.

JP-A-8-49202 JP 2010-59627 A JP 2013-064305 A

  In the joint part structure of patent document 3, the water stop performance of a junction part is improved by installing the water stop member under the metal plate. However, when the water stop member deteriorates, it is necessary to remove and repair the entire expansion device attached to the floor slab, which requires a large repair work and a long time for the repair work. Further, in the butt-type joint part structure, the wheel load cannot be supported by the gap part, so that vibration and noise increase.

  On the other hand, since the induction joint described above does not prevent the occurrence of cracks, it cannot prevent rainwater or the like from the cracks from flowing into the girders or the soil roadbed through the floor slab joints that have become voids. Further, in the method of injecting the repair material into the cracks, only the cracks in the asphalt pavement are plugged. Therefore, when the cracks are generated again, rainwater or the like flows into the girder part or the ground bed through the floor slab joint part. In bridges and viaducts, when rainwater or the like enters the girder, the steel material may be corroded. In composite paved roads, joint bodies (rebars) that connect floor slabs may be corroded by rainwater, etc., and soil roadbeds that contain water become very soft, causing vibrations when vehicles are driven. This hinders the smooth traffic of cars. Furthermore, when a relatively large amount of rainwater or the like flows in, there is a risk that the earth roadbed will flow out and a cavity will be formed.

  The present invention was made in view of such a background, and has a road joint part structure including a resin pavement construction method and a resin pavement construction method in a joint part of a road that is easy to repair, has low noise, and can suppress cracks. The purpose is to provide.

  According to one aspect of the present invention, the above problem is a method for constructing a resin pavement (10) at a joint portion of a road (1, 31), and a joint between floor slabs (3, 33) adjacent to each other. A first step of providing a strip-shaped unpaved portion (11) along the joints directly above (7, 37), and an edge cutting layer (14) having a width (W3) smaller than the width (W1) of the unpaved portion. ) Is provided on both floor slabs so as to straddle the joints in the center in the width direction of the unpaved portion, and the resin contains a relatively low elastic modulus at the time of curing (for example, an elongation of 200%) A third step of filling the uncured first pavement material (15) in the lower part of the unpaved portion and adhering it to a portion exposed from the edge-cutting layer in the both floor slabs; An uncured second resin containing a resin that is larger than the first pavement (for example, having an elongation of 30%). Solved by providing a method for constructing a resin pavement in a joint portion of a road, comprising a fourth step of filling a pavement material (16) above the first pavement material in the unpaved portion. Is done.

  In addition, according to one aspect of the present invention, the above problem is a belt-like shape along the joint just above the joint (7, 37) between the floor slabs (3, 33) adjacent to each other on the road (1, 31). It is a road joint part structure which consists of a resin pavement (10) formed in an unpaved part (11), Comprising: It has a width (W3) smaller than the width (W1) of the unpaved part, The unpaved part The edge-cutting layer (14) provided on both floor slabs so as to straddle the joint at the center in the width direction, and the lower part of the unpaved part so as to adhere to a portion exposed from the edge-cutting layer in the both floor slabs A first resin pavement layer (21) made of a first pavement material (15) containing a resin and having a relatively low elastic modulus (e.g., elongation rate of 200%), and above the first resin pavement layer The elastic modulus is larger than that of the first pavement material (for example, the elongation rate is 30%). It is solved by providing a road joint structure made of a resin pavement which comprises a second resin pavement layer comprising a second pavement (16) (22) containing a resin.

  Here, the floor slab is not limited to a bridge slab or a composite pavement floor slab, and includes a floor structure such as an abutment or a slab. According to these methods and configurations, since the metal plate attached to the floor slab is not used, the repair work of the joint portion of the road is easy, and the repair time can be shortened. Even when the floor slab expands and contracts due to a temperature change, the resin pavement is filled in the unpaved portion directly above the joint, so that cracks do not easily occur immediately above the joint. Moreover, since the part corresponding to the width of the edge cutting layer in the first resin formed through the edge cutting layer absorbs expansion and contraction, it is possible to prevent the occurrence of cracks due to stress concentration. As a result, it is possible to prevent rainwater or the like from entering the girder or the roadbed. Furthermore, since the second resin having a higher elastic modulus than the first resin is filled above the first resin, the wheel load can be supported even at the joint, and vibration and noise can be reduced.

  According to one aspect of the present invention, in the construction method of the resin pavement in the road joint portion, in the fourth step, the second pavement material (16) is lower than the surface of the road (1, 31). The uncured third pavement material (17) containing a resin having a larger elastic modulus than that of the second pavement material (for example, having an elongation of 10%) is cured in the unpaved portion. It may further include a fifth step of filling above the pavement material.

  According to one aspect of the present invention, in the road joint part structure formed of the resin pavement, the unpaved part (11) is formed above the second resin pavement layer (22), and the second pavement material is provided. It can be set as the structure which further includes the 3rd resin pavement layer (23) which consists of the 3rd pavement material (17) containing resin whose elasticity modulus is larger than (16) (for example, elongation rate 10%).

  According to these methods and configurations, since the surface of the resin pavement is formed of the third resin having a higher elastic modulus, it is possible to suppress wear of the road joint portion.

  According to one aspect of the present invention, in the construction method of the resin pavement in the joint portion of the road, in the fifth step, the induction joint along the joint (7, 37) of the floor slab (3, 33). (24) is provided on the third pavement material (23), and an uncured fourth pavement material containing a resin having an elastic modulus during curing smaller than that of the second pavement material (for example, having an elongation of 200%) ( 18) may further include a fifth step of filling the induction joint.

According to one aspect of the present invention, in the road joint part structure made of the resin pavement, the induction joint (24) along the joint (7, 37) of the floor slab (3, 33) is the third resin pavement. The layer (23) is filled with the fourth pavement material (18) containing a resin having a smaller elastic modulus (for example, 200% elongation) than the second pavement material (16). It can be configured.

  The third resin having the largest elastic modulus is likely to crack. However, according to these methods and configurations, the position where the crack is generated is controlled by providing the third resin with the induction joint, and the fourth joint is formed in the induction joint. By filling the resin, it is possible to prevent cracks from appearing on the surface of the resin pavement and impairing the beauty.

  According to one aspect of the present invention, in the construction method of the resin pavement in the joint portion of the road, in the third step, the side surface of the road (1, 31) exposed to the unpaved portion (11) is An uncured first pavement material (15) may be applied.

According to one aspect of the present invention, in the road joint part structure made of the resin pavement, the first pavement material (15) is disposed on a side surface of the road (1, 31) exposed to the unpaved part (11). It can be set as the structure provided so that it may adhere | attach.

  According to these methods and configurations, cracks are less likely to occur at the connecting portion between the resin pavement and the road, the aesthetic appearance can be improved, and intrusion of rainwater or the like into the girder or the roadbed can be more reliably prevented.

  As described above, according to the present invention, it is possible to provide a method for constructing a resin pavement in a joint portion of a road that can be easily repaired, have low noise, and can suppress cracks, and a road joint portion structure including the resin pavement.

It is a figure which shows the repair construction procedure of the road joint part which concerns on 1st Embodiment. It is explanatory drawing of the effect by the road joint part which concerns on 1st Embodiment. It is sectional drawing of the road joint part which concerns on a modification. It is a figure which shows the repair construction procedure of the road joint part which concerns on 2nd Embodiment. It is a figure which shows the repair construction procedure of the road joint part which concerns on 3rd Embodiment.

  Hereinafter, with reference to the drawings, three embodiments in which the present invention is applied to repair construction of a road joint portion will be described. In the second and third embodiments, the same elements as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

[First Embodiment]
In the first embodiment, for example, in an asphalt pavement 1 of a composite pavement part such as a highway, a strip-like unpaved part 11 is provided immediately above a joint 7 of a concrete slab 3 (floor slab), and the unpaved part 11 is sequentially provided. This is a repair work in which a resin pavement 10 is constructed at the slab joint by filling a pavement material containing resin.

  An asphalt pavement 1 shown in FIG. 1 (a) is a composite pavement formed by applying an asphalt pavement 4 on a concrete slab 3 continuously laid on a clay roadbed 2, and between adjacent concrete slabs 3. A joint 7 is provided. In the repair work, as shown in FIG. 1 (b), the worker first excavates the asphalt pavement 4 with a predetermined width W 1 across the joint 7 to form a belt-like unpaved portion 11. At this time, for example, a method may be employed in which a portion corresponding to the unpaved portion 11 is peeled off after a cut is made in parallel with the asphalt pavement 4 with a sander or a concrete cutter.

  Next, the operator polishes the upper surface of the concrete slab 3 with a brush to remove the attached asphalt or the like, and inserts a backer 12 (leakage prevention material) such as a sponge into the joint 7 as shown in FIG. To do.

  Thereafter, as shown in FIG. 1 (d), the worker provides an edge cutting layer 14 on the upper surface of the adjacent concrete slab 3 so as to cover the joint 7. The edge cutting layer 14 cuts both edges so that a first pavement material 15 to be described later does not adhere to the concrete slab 3, and controls the size of the adhesion region and the non-adhesion region of the first pavement material 15 to the concrete slab 3. belongs to. In this process, the edge cutting layer 14 having a width dimension corresponding to the non-bonded region is installed in the center of the unpaved portion 11 in the width direction so that the concrete slab 3 is exposed at both ends of the unpaved portion 11 in the width direction. To. That is, the edge cutting layer 14 has a width W3 that is larger than the width W2 of the joint 7 and smaller than the width W1 of the unpaved portion 11. The width W3 of the edge cut layer 14 is preferably at least one third of the width W1 of the unpaved portion 11, and more preferably at least one half of the width W1 of the unpaved portion 11.

  As the edge cutting layer 14, for example, a rubber asphalt resin, a rubber asphalt resin sheet (for example, AOI joint hoop N-200 manufactured by Aoi Chemical Industry Co., Ltd.), a self-adhesive seal such as a gum tape is used, and the upper surface of the concrete slab 3 is used. It is good to apply or paste on. By installing the edge cutting layer 14 in this way, it is possible to easily prevent the first pavement material 15 described later from flowing into the joint 7. In addition, when sticking a self-adhesive seal such as a resin sheet or a gummed tape to form the edge cutting layer 14, the step shown in FIG. 1C may be arbitrarily omitted.

  Next, as shown in FIG. 1 (e), the worker fills the uncured first pavement material 15 containing resin into the lower portion of the unpaved portion 11 and also exposes the asphalt pavement exposed to the unpaved portion 11. 4 is applied to the side surface of the concrete slab 3 and the side surface of the asphalt pavement 4 that is exposed from the edge cutting layer 14 of the concrete slab 3. In the present embodiment, the first pavement material 15 is filled or applied so as to have a thickness of about 5 mm to 10 mm, and the first resin pavement layer 21 is formed on the inner surface of the unpaved portion 11 by the hardening of the first pavement material 15. It is formed.

  The first resin pavement layer 21 securely adheres to the concrete slab 3 and plays a role of reliably transmitting the expansion / contraction amount of the concrete slab 3 to the second resin pavement layer 22 described later, and also prevents water leakage from the joint 7. Also fulfills. As the 1st pavement material 15 which is a raw material of the 1st resin pavement layer 21, while it has moderate viscosity at the time of non-hardening, it is excellent in adhesiveness with concrete, and the elastic modulus at the time of hardening is the 2nd pavement material 16 mentioned below. Thus, a vinyl ester elastic resin or the like having a followability to the relative displacement in the left and right and up and down directions of the adjacent concrete slab 3 is preferable. In the present embodiment, a vinyl ester-based elastic resin having an elongation rate of about 200% at the time of curing is used for the first pavement material 15. An appropriate mixture may be mixed with the vinyl ester elastic resin. Further, a primer may be applied to the inner surface of the unpaved portion 11 prior to filling or application of the first pavement material 15.

  Next, as shown in FIG. 1 (f), the worker fills the uncured second pavement material 16 containing resin above the first pavement material 15 in the unpaved portion 11. At this time, the second pavement material 16 is filled to a height lower than the surface of the asphalt pavement 1 by a predetermined dimension (about 10 mm to 20 mm). When the second pavement material 16 is cured, a second resin pavement layer 22 corresponding to the base layer is formed.

  The second resin pavement layer 22 functions to disperse the transmitted wheel load and prevent a local force (such as 7 joints) from acting, and the expansion and contraction of a third resin pavement layer 23 described later. It supplements the quantity. As the 2nd pavement material 16 which is a raw material of the 2nd resin pavement layer 22, while having an appropriate viscosity at the time of non-hardening, while being excellent in adhesiveness with concrete and the 1st resin pavement layer 21, the elasticity modulus at the time of hardening is A material that is larger than the first pavement material 15 and thus has both sufficient hardness and elasticity as a base layer is preferable. In the present embodiment, the second pavement material 16 is a mixture of a vinyl ester-based elastic resin and a fine aggregate (silica sand No. 8, etc.) having a weight ratio of 100%, and the elongation rate at the time of curing is the first pavement. It is about 30% which is smaller than the material 15.

  Next, as shown in FIG. 1 (g), the operator places an uncured third pavement material 17 containing resin on the surface of the asphalt pavement 1 above the second pavement material 16 in the unpaved portion 11. Fill to height. When the third pavement material 17 is cured, a third resin pavement layer 23 corresponding to the surface layer is formed.

  In the present embodiment, the induction joint 24 is formed on the surface of the third pavement material 17 along the joint 7 of the concrete slab 3, and the depth of the induction joint 24 is the same as the thickness of the third resin pavement layer 23. Yes. Thereby, the position of the crack generated in the second resin pavement layer 22 is controlled to the position of the induction joint 24. The induction joint 24 may be formed by installing a joint form when the third pavement material 17 is filled. However, the induced joint 24 may not be cut by a sander after the filled third pavement material 17 is cured. It may be formed by cutting. By forming the induction joint 24 in this way, the surface of the third resin pavement layer 23 can be easily finished flat.

  The third resin pavement layer 23 not only exhibits frictional resistance with the tire, but also reliably transmits the load from the road surface to the second resin pavement layer 22. As the 3rd pavement material 17 which is a material of the 3rd resin pavement layer 23, it has a moderate viscosity at the time of non-hardening, is excellent in adhesiveness with concrete and the 2nd resin pavement layer 22, and has an elasticity modulus at the time of hardening. A material that is larger than the second pavement material 16 and thus has a sufficient hardness as a surface layer is preferable. In the present embodiment, the third pavement material 17 is a mixture of vinyl ester-based elastic resin and an aggregate with a weight ratio of 300%, and the elongation at curing is smaller than that of the second pavement material 10. %. As the aggregate, it is preferable to use a hard spinel with excellent wear resistance such as Ceracron (registered trademark) manufactured by Mishu Kosan Co., Ltd. Further, before the third pavement material 17 is cured, a magnetic aggregate excellent in wear resistance such as Cerasand (registered trademark) manufactured by Mishu Kosan Co., Ltd. may be spread on the surface of the third pavement material 17. .

  Thereafter, as shown in FIG. 1 (h), the operator fills the induction joint 24 with the uncured fourth pavement material 18 containing resin as the joint filler, and constructs the resin pavement 10 at the slab joint portion. Complete the repair work. The induction joint 24 is provided to suppress the occurrence of cracks in the third resin pavement layer 23 due to the difference in elongation between the third resin pavement layer 23 and the second resin pavement layer 22. As the fourth pavement material 18 filled in the induction joint 24, the elastic modulus at the time of curing is smaller than that of the second pavement material 16, so that even when a crack occurs in the second resin pavement layer 22, it is adjacent. A vinyl ester-based elastic resin or the like having followability with respect to the relative displacement of the concrete slab 3 is suitable. In the present embodiment, the same vinyl ester-based elastic resin as the first pavement material 15 having an elongation at curing of about 200% is used for the fourth pavement material 18.

  In 1st Embodiment, the following effects can be acquired by performing such repair construction. That is, even if the concrete slab 3 contracts due to a temperature change and changes from the state of FIG. 2A to the state of FIG. 2B, the second resin pavement layer 22 contracts following the contraction of the concrete slab 3. This prevents the generation of cracks. Further, when the concrete slab 3 contracts, deformation and stress concentrate on a portion of the resin pavement 10 that does not adhere to the concrete slab 3 corresponding to the joint 7, but between the second resin pavement layer 22 and the concrete slab 3. Since the first resin pavement layer 21 having a smaller elastic modulus is provided and the first resin pavement layer 21 is formed so as not to adhere to the concrete slab 3 over the width W3 of the edge cut layer 14, the first resin pavement layer The portion corresponding to the edge cutting layer 14 is deformed and the stress is dispersed, and the occurrence of cracks in the first resin pavement layer 21 and the second resin pavement layer 22 is effectively prevented. Furthermore, since the first pavement material 15 is applied to the side surface of the asphalt pavement 4, the second resin pavement layer 22 and the third resin pavement layer 23 are unlikely to crack. Even if a crack occurs near the center in the width direction of the second resin pavement layer 22, since the fourth pavement material 18 is filled in the induction joint 24, rainwater or the like enters the roadbed 2. It hardly occurs, and cracks do not appear on the surface of the resin pavement 10 and the aesthetic appearance is not impaired.

  In addition, when a cavity is formed under the concrete slab 3 due to intrusion of rainwater or the like, the resin is filled in the cavity after the step shown in FIG. 1 (b), and thereafter FIG. The process may be advanced. In the case where the cavity is in the earth roadbed 2 at a part spaced apart from the joint 7, after a through hole communicating with the cavity is drilled in the concrete slab 3 (after so-called core removal), resin is put into the cavity and the through hole. To fill. As a resin to be filled in the cavity, a vinyl ester-based elastic resin having excellent adhesion to concrete, sufficient hardness as a lower roadbed, and followability with respect to the horizontal and vertical relative displacements of the adjacent concrete slab 3 etc. Is preferred.

  Although this embodiment demonstrated as a repair construction procedure of a slab joint part, a slab joint part is a joint formed just above the joint 7 of the concrete slab 3 also to the asphalt pavement 1 of the composite pavement newly constructed. It can be used as a partial structure. In this case, instead of stripping the asphalt pavement 4 and forming the unpaved portion 11 as described with reference to FIG. 1 (b), the asphalt pavement 4 is not applied to the unpaved portion 11 so that the asphalt pavement 4 is not applied to other portions. The unpaved portion 11 may be formed by pavement 4.

<Modification>
As shown in FIG. 3, a plurality of induction joints 24 may be formed in the extending direction of the road. In this case, it is preferable to fill the third pavement material 17 on the second resin pavement layer 22 and finish it flat, and to cut or cut the third resin pavement layer 23 with a sander or the like to form the induction joint 24. Further, one induction joint 24 may be formed immediately above the joint 7 of the concrete slab 3, and the additional induction joint 24 may be formed symmetrically before and after the one. Each induction joint 24 is filled with an uncured fourth pavement material 18 containing a resin as a joint filler as in the above embodiment.

[Second Embodiment]
As in the first embodiment, the second embodiment shown in FIG. 4 is provided with a strip-shaped unpaved portion 11 in the asphalt pavement 1 of the composite paved portion, and the unpaved portion 11 has a resin pavement 10 at the slab joint portion. However, the structure of the resin pavement 10 is slightly different from that of the first embodiment.

  The structure of the asphalt pavement 1 shown in FIG. 4A and the work steps from the formation of the unpaved portion 11 to the formation of the edge cutting layer 14 shown in FIGS. 4B to 2D are the first embodiment. The explanation is omitted because it is the same as.

  In this embodiment, after forming the edge cutting layer 14, as shown in FIG.4 (e), an operator fills the uncured 1st pavement material 15 containing resin to the lower part of the unpaved part 11, and concrete slab 3 is filled. The first resin pavement layer 21 is formed only on the lower portion of the unpaved portion 11 by adhering to the portion exposed from the edge cutting layer 14.

  The subsequent operations for forming the second resin pavement layer 22 and the third resin pavement layer 23 shown in FIGS. 4 (f) and 4 (g) are the same as those in the first embodiment. In addition, it is good also as an aspect which forms multiple induction joints 24 similarly to the modification of 1st Embodiment. The same applies to the third embodiment.

  Even with the resin pavement 10 formed in the slab joint portion by such a work procedure, it is possible to obtain substantially the same operational effects as in the first embodiment.

[Third Embodiment]
In the third embodiment shown in FIG. 5, for example, in a viaduct or bridge asphalt pavement 31 such as an expressway, a belt-like unpaved portion 11 is provided immediately above a joint 37 of a floor slab 33 constituting an upper work. This is a repair construction in which the pavement material containing resin is sequentially filled in the part 11 to construct the resin pavement 10 in the floor slab joint part.

  An asphalt pavement 31 shown in FIG. 5 (a) is a viaduct or bridge pavement in which an asphalt pavement 4 is provided on a floor slab 33 continuously installed with a girder (not shown). Is provided between the floor slabs 33 that are supported in close proximity to each other (that is, between the floor slabs, referred to herein as joints 37). In the joint portion of the asphalt pavement 4, an expansion / contraction device 40 having expansion / contraction performance is provided integrally with the floor slab 33. The expansion device 40 may be any one of a load support type joint structure, a butt type joint structure, and an embedded type joint structure. Here, a concrete anchor 35 is installed in a recess formed in the upper part of the floor slab 33, and a corner metal fitting 38 is arranged so as to face each other above the joint 37 by a reinforcing bar 36 assembled thereto, and then the super speed is set. A telescopic device 40 is attached above the hard concrete 39.

  The worker first removes the expansion / contraction device 40, the super-hard hard concrete 39, and the corner metal fitting 38 so as to leave the concrete anchor 35 and the reinforcing bar 36 as shown in FIG. In addition, you may install a new thing after removing the reinforcing bar 36 once. When removing the expansion / contraction device 40, for example, an incision may be made in parallel with the vicinity of the boundary with the asphalt pavement 4 by using an alfalt cutter or the like, and then an appropriate method suitable for the structure may be used. Thereby, the recessed part 34 dented below compared with another part is formed in the part (both side part of the joint 37) which installed the expansion-contraction apparatus 40 in the asphalt pavement 4 and the floor slab 33.

  Next, as shown in FIG. 5 (c), the operator assembles the mold 41 at the lower part of the recess 34, and reaches the same height as the upper surface of the other part of the floor slab 33, that is, the lower surface of the asphalt pavement 4. By casting the super-hard hard concrete 39, the strip-shaped unpaved portion 11 having a predetermined width W1 is formed with the joint 37 interposed therebetween. In FIG. 5C and subsequent figures, the concrete anchor 35 and the reinforcing bar 36 are not shown. After curing the ultra-high speed hard concrete 39, the operator removes the form 41 and inserts the backer 12 at the upper part of the joint 37 as shown in FIG. The edge cutting layer 14 is provided so as to cover the joints 37 on the upper surface of FIG.

  After the edge cutting layer 14 is provided, the operation steps in FIGS. 5E to 5H until the formation of the resin pavement 10 is completed are the same as those described in the composite pavement of the first embodiment. Therefore, the explanation is omitted.

  Also in the third embodiment, by performing repair work in the same manner as in the first embodiment, even if the floor slab 33 contracts due to a temperature change, the second resin pavement layer 22 follows the contraction of the floor slab 33. Shrinkage prevents the occurrence of cracks. In addition, when the floor slab 33 contracts, deformation and stress concentrate on a portion of the resin pavement 10 that does not adhere to the floor slab 33 corresponding to the joint 37, but between the second resin pavement layer 22 and the floor slab 33. Since the first resin pavement layer 21 having a smaller elastic modulus is provided and the first resin pavement layer 21 is formed so as not to adhere to the floor slab 33 over the width W3 of the edge cut layer 14, the first resin pavement layer The portion corresponding to the edge cutting layer 14 is deformed and the stress is dispersed, and the occurrence of cracks in the first resin pavement layer 21 and the second resin pavement layer 22 is effectively prevented. Furthermore, since the first pavement material 15 is applied to the side surface of the asphalt pavement 4, the second resin pavement layer 22 and the third resin pavement layer 23 are unlikely to crack. Even if a crack occurs in the vicinity of the center in the width direction of the second resin pavement layer 22, since the fourth pavement material 18 is filled in the induction joint 24, almost no intrusion into the girder part such as rainwater occurs. In addition, no cracks appear on the surface of the resin pavement 10 and the aesthetic appearance is not impaired.

  Also in the present embodiment, the floor slab joint portion has been described as a repair construction procedure, but the floor slab joint portion is formed immediately above the joint 37 of the floor slab 33 with respect to the newly constructed viaduct or bridge asphalt pavement 31. It can be used as a joint part structure. In this case, instead of forming the unpaved portion 11 by removing the expansion / contraction device 40 described with reference to FIG. 5B, the other portions of the unpaved portion 11 are not subjected to the asphalt pavement 4. What is necessary is just to give the asphalt pavement 4 and to form the unpaved part 11. FIG.

  This is the end of the description of specific embodiments. However, aspects of the present invention are not limited to these embodiments. For example, each of the embodiments described above applies the present invention to repair work of a road joint portion on an expressway, but the present invention can also be applied to repair work of a road joint portion on a general road or new construction work. is there. In the above embodiment, the second pavement material 16 is filled to a height lower than the surface of the asphalt pavement 1 by a predetermined dimension, and the third pavement material 17 is filled to the surface height of the asphalt pavement 1 in the surface layer portion. The second pavement material 16 can be filled up to the surface height of the asphalt pavement 1 to eliminate the third resin pavement layer 23. Further, even when the third resin pavement layer 23 is formed, the induction joint 24 may be omitted. In the third embodiment, the present invention is applied to the joint portion between the floor slabs 33 adjacent to each other, but the joint portion between the floor slab 33 and the abutment or the joint portion between the abutment and the stepping plate. It can also be applied to. Moreover, the structure shown as a modification of 1st Embodiment may be applied to other embodiment, and the structure of each embodiment may be combined. In addition to the specific construction procedure, the edge cutting layer 14, the first pavement material 15, the second pavement material 16 and the like can be changed or selected as appropriate without departing from the spirit of the present invention.

1 Asphalt pavement (composite pavement)
3 Concrete slab (floor)
4 Asphalt pavement 7 Joint 10 Resin pavement 11 Unpaved part 14 Edge cutting layer 15 1st pavement material 16 2nd pavement material 17 3rd pavement material 18 4th pavement material 21 1st resin pavement layer 22 2nd resin pavement layer 23 1st 3 Resin pavement layer 24 Induction joint 31 Asphalt pavement (bypass or bridge)
33 Floor slab 37 Joint (floor slab play)
W1 Width of unpaved portion 11 W3 Width of edge cutting layer 14

Claims (8)

It is a construction method of a resin pavement in a joint part of a road,
A first step of providing a strip-shaped unpaved portion along the joint immediately above the joint between the floor slabs adjacent to each other;
A second step of providing an edge cutting layer having a width smaller than the width of the unpaved portion on both floor slabs so as to straddle the joint at the center in the width direction of the unpaved portion;
A third step of filling a non-cured first pavement material containing a resin and having a relatively low elastic modulus at the time of curing into a lower portion of the unpaved portion and adhering to a portion exposed from the edge cutting layer in the both floor slabs When,
Including a fourth step of filling an uncured second pavement material containing a resin having a higher elastic modulus at the time of curing than the first pavement material above the first pavement material in the unpaved portion. Construction method of resin pavement at the joint part of the characteristic road. In the fourth step, the second pavement material is filled to a height lower than the surface of the road,
The method further includes a fifth step of filling an uncured third pavement material containing a resin having a larger elastic modulus at the time of curing than the second pavement material above the second pavement material in the unpaved portion. The construction method of the resin pavement in the joint part of the road of Claim 1 characterized by the above-mentioned. In the fifth step, the third pavement is provided with a trigger joint along the joint of the floor slab,
3. The method according to claim 2, further comprising a fifth step of filling the induction joint with an uncured fourth pavement material including a resin having an elastic modulus lower than that of the second pavement. Method of resin pavement in the joint part of the road.   The road according to any one of claims 1 to 3, wherein in the third step, the uncured first pavement material is applied to a side surface of the road exposed to the unpaved portion. Construction method of resin pavement at the joint part. A road joint part structure consisting of a resin pavement formed in a belt-like unpaved part along the joint just above the joint between floor slabs adjacent to each other,
An edge cutting layer provided on both floor slabs having a width smaller than the width of the unpaved portion, and straddling the joint at the center in the width direction of the unpaved portion,
A first resin pavement layer formed of a first pavement material including a resin, which is formed at a lower portion of the unpaved portion so as to adhere to a portion exposed from the edge cut layer in the both floor slabs;
A resin pavement formed above the first resin pavement layer and having a higher elastic modulus than the first pavement material and comprising a second resin pavement layer containing a resin. The road joint part structure that becomes.   6. The method according to claim 5, further comprising a third resin pavement layer formed of a third pavement material including a resin, which is formed above the second resin pavement layer and has a higher elastic modulus than the second pavement material. The road joint part structure which consists of the resin pavement of description.   The induction joint along the joint of the floor slab is provided in the third resin pavement layer, and the induction joint is filled with a fourth pavement material containing a resin having a smaller elastic modulus than the second pavement material. The road joint part structure which consists of the resin pavement of Claim 6 characterized by the above-mentioned.   The resin pavement according to any one of claims 5 to 7, wherein the first pavement material is adhered to a side surface of the road exposed to the unpaved portion. Road joint part structure consisting of

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