JP5286193B2 - PC structure for asphalt pavement and its installation method - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a PC structure (precast concrete structure) for asphalt pavement such as a side gutter and a pedestrian road boundary block installed in an area of an asphalt pavement such as a road or along a side edge thereof, and an installation method thereof.

  When installing a PC structure on an asphalt pavement such as a road, asphalt pavement layers such as a surface layer and a base layer in the pavement are joined to a wall surface of the PC structure facing the same (see Patent Documents 1 and 2).

  The joint portion between the wall surface to be joined of the PC structure and the pavement layer of the pavement is usually bonded via an asphalt emulsion or the like as an adhesive at a construction site, and specifically, fixed and fixed at a predetermined position. The asphalt emulsion is applied to the PC wall to be bonded by a method such as spraying, and then a paving material made of heated asphalt mixture is laid along the PC wall to be bonded and tightened. As a result, the heated pavement is bonded to the bonded wall surface of the PC structure via the asphalt emulsion, and a pavement layer having a required configuration is constructed along the bonded wall surface.

JP 2003-160905 A JP2007-107232A

  However, as described above, it is extremely difficult to apply asphalt emulsion and the like on the wall surface of the PC structure that has been installed and fixed to the wall surface to be joined with a uniform thickness within a limited time. In order to reliably apply asphalt emulsion etc. with uniform thickness on the wall surface of the PC structure under the above circumstances, it requires high skill and a great number of man-hours. It also delays the time to release traffic to wait for the heated pavement to cool down in the later pavement layer.

  In addition, if the application of asphalt emulsion or the like to the wall surface of the PC structure to be bonded is insufficient as described above, it adheres to the bonded portion between the wall surface to be bonded of the PC structure and the pavement layer of the pavement after installation. Not only does it cause defects and poor watertightness, but it causes not only strength reduction and instability at the edge of the pavement layer, but also rainwater that has fallen on the pavement penetrates from the joints into the deep pavement layer and scours the roadbed. As a result, the life of the pavement is drastically shortened, and pedestrians and vehicles traveling on the pavement are exposed to serious danger.

  The problem of the present invention is that, in view of the problems of the prior art, the construction workability when installing on asphalt pavement is excellent and the installation time is greatly shortened, and the wall surface to be joined and the pavement layer of the pavement after installation Assures strong water-tight adhesion at the joint to the joint wall, and firmly bonds and integrates the pavement layer to the joined wall surface, intrusion of rainwater from those joints, scouring of the roadbed and pavement layer It is to provide an asphalt pavement PC structure that does not cause subsidence and the like, and its installation method.

  The PC structure according to the present invention that solves the above-mentioned problems is a PC structure that is installed in an area of an asphalt pavement or along a side edge of the asphalt pavement. The present invention is characterized in that an asphalt adhesive layer is formed on a wall surface to be joined which is opposed to the pavement layer.

  Since the asphalt adhesive layer is formed on the bonded wall surface of the PC structure by the above configuration, the adhesive comprising the asphalt emulsion or the like on the bonded wall surface at the construction site when the PC structure is installed on the pavement. The process of heating and melting the asphalt adhesive layer formed in advance on the welded wall surface, that is, easy and insignificant without passing through a uniform and non-coating process, that is, a difficult and time-consuming application process. After passing through only the heating and melting process required by the number of steps, it is possible to shift to the subsequent asphalt pavement laying and compacting process, and in those laying and compacting processes, the above-mentioned bonded wall surfaces are heated and melted. Asphalt adhesive layer and heated asphalt pavement are welded, which ensures that the joint between the PC wall to be joined and the pavement layer of the pavement is securely bonded. Than is.

  In addition, with the above configuration, the pavement layer of the pavement is firmly bonded and integrated with the bonded surface of the PC structure after installation, so that the strength and stability of the end of the pavement layer can be achieved, and As described above, the joint between the wall surface to be joined of the PC structure and the pavement layer of the pavement after being installed is bonded in a watertight state via the asphalt adhesive layer previously formed on the wall surface to be joined. When the pavement layer to be joined to the surface to be joined includes a non-permeable pavement layer as in ordinary asphalt pavement, rainwater and the like can be prevented from entering the pavement layer deeper such as the roadbed from the joint. Is done.

  Examples of the asphalt pavement include asphalt pavement roads, parking lots, parks, gardens, and the like, and PC structures include rainwater that has fallen on asphalt pavement and permeable pavement layers of pavement, for example. Precast concrete waterway blocks for the purpose of collecting and draining rainwater, drainage, forming boundaries between sidewalks and roadways, creating sections within paved areas, and forming foundations for various installations on paved areas, Examples include drainage blocks, water conveyance blocks, culverts, gutters, drainage pits, road boundary blocks, pedestrian boundary blocks, paving stops, curbs, and car stops.

  The asphalt adhesive layer does not necessarily have to be formed on the entire surface of the welded wall, but rainwater etc. is paved from the joint between the welded wall of the PC structure and the paved layer of the paved ground after installation. In order to prevent intrusion into the deep layer, as described above, on the wall surface to be joined that is opposed to the non-permeable pavement layer disposed before reaching the deep pavement layer such as the roadbed in the pavement layer. The asphalt adhesive layer must be securely formed.

  In the PC structure installed in or along the side edge of the asphalt pavement including the drainage pavement layer formed by laminating the water permeable pavement layer on the non-permeable pavement layer, As described above, the water permeable pavement layer is provided on the wall surface portion provided with a drainage channel such as tubular, U-shaped or L-shaped inside or on the surface, and joined to face the permeable pavement layer on the wall surface to be joined at the time of installation. Water drainage means such as drain holes for allowing permeated rainwater to flow into the drainage channel and guide grooves for guiding permeated rainwater to the perforated rainwater are drilled, and the drainage means is perforated on the welded wall surface. An asphalt adhesive layer is formed except for the opening.

  After the installation of the PC structure, the rainwater that has fallen on the pavement passes through the water-permeable pavement layer and is prevented from entering the pavement layer by the water-impermeable pavement layer. It flows out into the drainage channel through the extraction means. In addition, for the PC structure, water-tight adhesion is not required at the joint between the water-permeable pavement layer and the wall surface to be bonded, but in order to maintain and stabilize the strength of the pavement layer after construction, An asphalt adhesive layer is also formed on the wall surface to be joined to the water-permeable pavement layer except for the perforation port of the water draining means, whereby a strong adhesion of the joint is obtained.

  The PC structure in which the asphalt adhesive layer is formed on the surface to be joined is a water-permeable pavement in which the pavement layer constructed along the surface to be joined is allowed to permeate and drain rainwater through the roadbed deep in the pavement layer. Needless to say, the present invention can also be applied to maintain and stabilize the strength of the pavement layer.

  As the shape of the wall surface to be joined of the PC structure, one composed of one or more planes and / or curved surfaces is widely included, and for example, it may be composed of a single vertical plane that is often used conventionally. On the other hand, the end portion of the pavement layer constructed along the bonded wall surface after installation is effectively supported by the bonded wall surface, and the settling tendency of the pavement layer can be suppressed. As described above, it is also possible to suitably employ a structure in which the bonded wall surface is partially or entirely formed so as to expand downward by inclination, curvature, stepping, or the like. For example, the wall surface to be joined may be formed with a slope or a curve of the downward extension only in a surface portion or an area portion to be joined with a specific pavement layer such as a surface layer and a base layer, or the downward extension over the entire surface of the joined wall surface. An inclination or a curve may be formed.

  Formation of the asphalt adhesive layer on the bonded surface of the PC structure is performed, for example, by applying an asphalt material such as asphalt or modified asphalt through a tack coat with an asphalt emulsion or the like, if necessary. On the other hand, in order to reliably form a uniform asphalt adhesive layer, an asphalt sheet formed by supporting an asphalt material on a sheet base material, preferably as described in claim 4, is heat resistant. Asphalt sheets that are supported by impregnating, covering, laminating, etc., asphalt materials such as asphalt and modified asphalt on non-woven fabrics, knitted fabrics and other porous and impregnated sheet base materials made of glass fibers and chemical fibers Use this as a tackifier, or if necessary, via a tack coat, etc., and asphalt material itself Added by using the enhanced tackiness by the, or may be done by attaching while heated and melted at Tochibana other means asphalt material of the adherend surface.

  As described above, the surface of the asphalt adhesive layer formed by coating or sticking an asphalt sheet as described above protects the surface from contamination, fouling, and the like until it is heated and melted. A protective film made of a plastic film such as polyethylene, polypropylene, polyester, or a paper material may be releasably coated so that the film does not inadvertently adhere to the material in contact therewith, or the protective film according to claim 6 Thus, the fine particle which consists of heat-resistant materials, such as minerals, such as cinnabar, and ceramics, may adhere.

  The PC structure is susceptible to contamination on the surface from the manufacture to the completion of final installation, and particularly when black asphalt pavement material adheres to the gray-white concrete surface in the PC structure during installation work, As a result, the contamination becomes noticeable and the aesthetics are impaired and the evaluation of the construction is lowered. Therefore, as the PC structure, an antifouling film made of a plastic film or paper material such as polyethylene, polypropylene, polyester, etc. on the wall surface such as the upper surface exposed from the pavement after installation is used as the pressure-sensitive adhesive. If a material that is peelably bonded through a layer is employed, the wall surface is antifouled and protected to a beautiful surface state until the antifouling film is peeled off after completion of installation.

  The method for installing the PC structure having the above-described configuration is, for example, as described in claim 8, in which the PC structure is installed and fixed in an asphalt pavement area or a planned pavement area or along a side edge thereof. A step of heating and melting an asphalt adhesive layer on a wall surface to be bonded in the PC structure fixed and fixed, and a paving material made of a heated asphalt mixture along the wall surface to be bonded of the PC structure. Laying and compacting, thereby bonding the pavement material to the bonded wall surface of the PC structure via an asphalt adhesive layer and constructing the pavement layer along the bonded wall surface. It is said.

  In the installation and fixing process of the PC structure, the PC structure is a predetermined method according to the form and type thereof, in the area of the asphalt pavement or the planned pavement or along the side edge thereof. At a predetermined depth at a position, for example, it is fixed on a foundation material such as a foundation crushed stone that has been constructed in advance, via uniform concrete, foundation concrete, mortar or the like.

  In the heating and melting step of the asphalt adhesive layer on the bonded wall surface, the asphalt adhesive layer on the bonded wall surface in the PC structure installed and fixed as described above is heated by a heating device such as a torch burner or a hot air heater. As a result, it is melted so that it can be satisfactorily welded to the heated asphalt pavement laid along the bonded wall surface as will be described later.

  As described above, for the PC structure in which the protective film is releasably coated on the surface of the asphalt adhesive layer on the bonded wall, the protective film is peeled and removed prior to the heating and melting step. The In addition, as described above, the PC structure in which fine particles made of a heat-resistant material such as ceramic are adhered to the surface of the asphalt adhesive layer on the bonded wall surface is subjected to the heating and melting step as it is. The asphalt adhesive layer is heated and melted by the above, and the fine particles are dispersed from the surface into the asphalt adhesive layer and coated with the molten asphalt adhesive layer to act as a kind of aggregate. There is no problem in welding between the asphalt adhesive layer thus formed and the heated asphalt pavement.

  Furthermore, in the laying and compacting process of the heated pavement material, the required pavement material made of asphalt mixture is joined to the asphalt adhesive layer formed by heating and melting as described above by the same method as the conventional method. Along the wall surface, it is configured according to the pavement structure of the asphalt pavement or planned pavement or the depth of the PC structure that is installed and fixed, for example, to construct the roadbed, base layer and surface layer, or base layer and surface layer, etc. Sequentially laid and compacted with a compactor, etc., so that the pavement material is securely bonded to the wall surface of the PC structure via the asphalt adhesive layer and has a required configuration along the wall surface to be bonded. A pavement layer is built. In addition, when the pavement layer constructed along the bonded wall surface extends over a plurality of layers such as a base layer and a surface layer, the required pavement material and its compaction are performed for each layer construction, If necessary, the asphalt adhesive layer on the to-be-joined wall facing the layer is heated and melted prior to laying the required paving material for each layer construction.

  In the case where the PC structure has a structure corresponding to the drainage pavement layer as described in claim 2, the permeable pavement layer is constructed along the wall surface portion where the drainage means is drilled in the bonded wall surface. A non-permeable pavement layer is constructed along the wall surface portion lower than the wall surface portion.

  In addition, about the PC structure body which the antifouling film for pollution prevention was adhere | attached on the wall surface exposed from a pavement after installation so that peeling was possible, this antifouling film is peeled and removed after completion of the said laying and compaction.

  As described above, according to the invention according to claim 1, it is excellent in construction workability when installed on a pavement, and the installation time is greatly shortened. A strong water-tight state of the joints of the joints is ensured, and the pavement layer is firmly adhered and integrated with the welded wall surface. Intrusion of rainwater from these joints, scouring of the roadbed, and the pavement layer A PC structure that does not cause subsidence is provided.

  According to the invention which concerns on Claim 2, the PC structure which can be applied suitably for the asphalt pavement including the drainage pavement layer formed by laminating the water permeable pavement layer on the water-impermeable pavement layer is provided.

  According to the invention of claim 3, the end of the pavement layer constructed along the bonded wall surface after installation is effectively supported by the bonded wall surface, and the strength of the pavement layer end can be maintained and stabilized. There is provided a PC structure that can contribute to the suppression of the settlement tendency of the pavement layer.

  According to the invention which concerns on Claim 4, the tough asphalt adhesive layer which has predetermined | prescribed quality and uniform thickness is formed in the to-be-joined wall surface is provided.

  According to the invention according to claim 5, the asphalt adhesive layer on the bonded wall surface is protected from surface contamination and fouling until the time of heat-melting, while suppressing the adhesiveness of the surface until the time of heat-melting in the installation process. A PC structure is provided.

  According to the invention which concerns on Claim 6, the asphalt adhesive layer on a to-be-joined wall surface is protected from surface contamination, a stain | pollution | contamination, etc. until the time of heat-melting while suppressing the adhesiveness of the surface until the time of heat-melting in an installation process. In addition, a PC structure that can be directly subjected to heating and melting without any additional work is provided.

  According to the invention of claim 7, there is provided a PC structure in which the wall surface exposed from the pavement after installation is protected to a clean surface state until the antifouling film is peeled and removed after the installation is completed. Is done.

  According to the invention according to claim 8, the PC structure is paved between the wall surface to be joined and the paved land after installation in the asphalt paved area or along the side edge thereof with good workability and in a short time. It is possible to secure and install a strong water-tight bond at the joint with the layer.

It is sectional drawing of an example of the PC structure which concerns on this invention, (A) before installation fixation, (B) at the time of installation fixation, (C) at the time of heat melting of an asphalt adhesive layer, (D) is completion of installation Each subsequent state is shown. It is principal part sectional drawing of the asphalt adhesive layer formed by application | coating to the to-be-joined wall surface of the PC structure which concerns on this invention, (A) is what exposed the surface, (B) can peel a protective film on the surface (C) shows the case where fine particles made of a heat-resistant material are attached to the surface. It is principal part sectional drawing of the asphalt adhesive layer formed by sticking an asphalt sheet to the to-be-joined wall surface of the PC structure which concerns on this invention, (A) is what exposed the surface, (B) is protecting on the surface Each of the films is a film that is releasably coated, and (C) shows a film having fine particles made of a heat-resistant material attached to the surface. It is sectional drawing which illustrates the shape of the to-be-joined wall surface in the PC structure which concerns on this invention, (A) is what the to-be-joined wall surface consists of several surfaces including the inclined wall surface which spreads down on the upper part, (B) The wall surface is composed of a plurality of surfaces including a curved wall surface extending downward, (C) is composed of a plurality of surfaces including an inclined wall surface and a horizontal wall surface extending downward, and (D) is a wall surface to be bonded. Are respectively composed of slanted wall surfaces that expand downward. It is sectional drawing which illustrates the form of the to-be-joined wall surface in the PC structure corresponding to a drainage pavement layer based on this invention, and the formation aspect of an asphalt adhesive layer to this to-be-joined wall, (A) is to-be-joined wall surface (B) shows each of the surfaces to be joined consisting of a plurality of surfaces including a vertical wall surface, a horizontal wall surface, and a downwardly extending inclined wall surface. .

  Below, the PC structure for asphalt pavement according to the present invention and its installation method will be specifically described based on the drawings.

[Configuration of PC structure and its installation method]
In FIG. 1 (A), the illustrated PC structure Q is a boundary formation / water channel block, a circular drainage channel 2 is bored inside, and a plurality of drainage holes 3 leading to the drainage channel 2 are formed on the upper wall surface. And a guide groove 4 is made to communicate therewith, and a boundary-forming piece 5 is projected on the rear side of the upper wall surface, facing the pavement layer of an asphalt pavement such as a paved road on the front side when installed. Asphalt adhesive layer L is formed on the vertical wall surface Wa that becomes the bonded wall surface W to be bonded, and further, the upper wall surface exposed from the pavement after installation and the upper wall surface and the front wall surface of the boundary forming piece 5 are used for preventing contamination. The antifouling film F is detachably bonded.

  As shown in FIG. 1 (B), the PC structure Q is fixed and fixed on the ground crushed stone 11 via the uniform concrete 12 along the side edge of the pavement R excavated by a conventionally known method. The The lengthwise joining between the PC structures Q is also performed by a conventionally known joining means.

  Next, the asphalt adhesive layer L on the to-be-joined wall surface W in the PC structure Q installed and fixed as described above is subjected to the heating paving material laying and compacting process described later, as shown in FIG. As shown in FIG. 3, the heat is melted by a heating device 14 such as a torch burner or a hot air heater.

  Subsequently, as shown in FIG. 1 (D), the required pavement material made of asphalt mixture is conventionally along the joined wall surface W on which the asphalt adhesive layer L heated and melted is formed. In order to form a pavement layer S having a required configuration, that is, a base layer Sb made of a non-permeable pavement layer and a surface layer Sc made of a non-permeable pavement layer by a known construction method, sequentially through a prime coat, a tack coat, etc. The pavement material is laid and compacted by a compactor, so that the pavement is securely bonded to the bonded wall surface W of the PC structure Q via the asphalt adhesive layer L and required along the bonded wall surface W. A structured pavement layer S is constructed. If necessary, for each construction of the base layer Sb and the surface layer Sc in the pavement layer S, heating and melting of the asphalt adhesive layer L on the bonded wall surface W facing them, laying and compacting of the required pavement material are performed. Done. The pavement R formed of the pavement layer S is used for traffic release after the pavement material of the surface layer Sc is allowed to cool and reach a predetermined temperature or lower.

  Depending on the use, height dimension, installation depth, etc. of the PC structure Q, the pavement layer S constructed along the bonded wall surface W may be the surface layer Sc alone or the base layer Sb and the surface layer Sc. obtain. Further, the asphalt adhesive layer L does not necessarily have to be formed over the entire surface of the bonded wall surface W, and is formed only on the wall surface portion to be bonded to the surface layer Sc, for example, of the bonded wall surface W. Alternatively, it may be formed on the wall surface portion joined to the surface layer Sc and / or the base layer Sb up to the roadbed. In addition, on the back side of the PC structure Q, that is, on the side opposite to the paved land R, a ground structure H such as a paved land or a sidewalk different from the above is constructed by a conventionally known method. Detailed description thereof is omitted here.

  The antifouling film F is peeled and removed after the installation of the PC structure Q by the completion of the pavement construction, whereby the upper wall surface of the PC structure Q main body and the upper wall surface and the front wall surface of the boundary forming piece 5 are separated from the pavement R. Exposed in a clean and clean surface condition.

  After the installation of the PC structure Q, the rain water that has fallen on the paved land R flows down to the upper wall surface along the surface layer Sc composed of the impermeable pavement layer, and the drain hole 3 and the guide groove 4 on the upper wall surface are passed through. To drain into the drainage channel 2. Even when the surface layer Sc is made of a water-permeable pavement layer, the rain water that has fallen on the pavement R is absorbed and transmitted through the surface layer Sc and flows down to the upper wall surface along the surface layer Sc in the same manner as described above. However, preferably, as described above or specifically described later, it is bonded to the surface layer Sc made of the water-permeable pavement layer on the bonded wall surface W of the PC structure Q. Water drainage means such as drainage holes for discharging rainwater that permeates the surface layer Sc to the central drainage channel 2 and the like and guide grooves for guiding the permeated rainwater to them are formed in the wall surface portion.

[Formation of asphalt adhesive layer on the surface to be joined]
The formation of the asphalt adhesive layer L on the wall surface W to be joined in the PC structure Q is performed in various modes.

  For example, in the asphalt adhesive layer L shown in FIG. 2, an asphalt material is applied to the bonded wall surface W of the PC structure Q with a uniform thickness, thereby forming the asphalt adhesive layer L composed of the asphalt application layer 21. ing. In FIG. 6A, the surface of the formed asphalt adhesive layer L is exposed as it is, and in FIG. 5B, the surface of the formed asphalt adhesive layer L is contaminated until the heat melting. The protective film 15 is releasably coated so that the surface is not inadvertently adhered to the contact with the surface of the asphalt adhesive layer L, as shown in FIG. For the same reason as described above, fine particles 16 made of a heat-resistant material such as mineral such as cinnabar and ceramic are attached to the surface.

  In addition, in the asphalt adhesive layer L shown in FIG. 3, the asphalt sheet 22 formed by impregnating and covering the asphalt material 24 on the sheet base material 23 made of nonwoven fabric is adhered to the bonded wall surface W of the PC structure Q. As a result, an asphalt adhesive layer L made of the asphalt sheet 22 is formed. In FIG. 3 (A), the surface of the formed asphalt adhesive layer L is exposed as it is, and in FIG. 3 (B), the surface of the formed asphalt adhesive layer L is contaminated until it is heated and melted. The protective film 15 is releasably coated so that the surface does not inadvertently adhere to the contact with the surface, and in FIG. 3C, the asphalt adhesive layer L formed is protected. For the same reason as described above, fine particles 16 made of a heat-resistant material such as mineral such as cinnabar and ceramic are attached to the surface.

[Shape of welded wall surface and pavement layer construction]
As the shape of the bonded wall surface W in the PC structure Q, various shapes other than the flat vertical wall surface Wa shown in FIG. 1 are adopted.

  For example, in FIG. 4 (A), the illustrated PC structure Q is an L-shaped side groove block, and an L-shaped drainage channel 6 is drilled on the upper surface, facing the pavement layer S of the pavement R on the front side when installed. The wall surface W to be bonded is formed by connecting an inclined wall surface Wb and a vertical wall surface Wa extending downward, and the pavement layer S composed of the surface layer Sc, the base layer Sb, and the like is connected to the bonded wall surface having the above-described configuration during installation work. Along W, the asphalt adhesive layer L is built on those surfaces.

  In the PC structure Q shown in FIG. 4 (B), the illustrated PC structure Q is also an L-shaped side groove block, and an L-shaped drainage channel 6 is drilled on the upper surface. The wall surface W to be joined facing the pavement layer S is formed by connecting a curved wall surface Wc and a vertical wall surface Wa extending downward, and in the installation work, the pavement layer S composed of the surface layer Sc, the base layer Sb, etc. It is constructed along the as-bonded wall surface W of the construction via the asphalt adhesive layer L on those surfaces.

  In FIG. 4 (C), the illustrated PC structure Q is a boundary forming block, and the surface W to be joined facing the pavement layer S of the pavement R on the front side at the time of installation is inclined downward. The wall surface Wb, the horizontal wall surface Wd, and the vertical wall surface Wa are successively connected in a step shape, and the pavement layer S composed of the surface layer Sc, the base layer Sb, and the like is disposed along the bonded wall surface W of the above-described configuration during the installation work. Built through the asphalt adhesive layer L on the surface.

  In FIG. 4 (D), the illustrated PC structure Q is a car stop block, facing the pavement layer S of the pavement R around the four sides (only the front and back sides are shown) during installation. The bonded wall surface W to be joined is composed of an inclined wall surface Wb and a vertical wall surface Wa on both sides, and a pavement layer S made of a surface layer Sc, a base layer Sb, and the like. Each of the surfaces is constructed along the to-be-bonded wall surface W via the asphalt adhesive layer L on the surfaces.

  In the PC structure Q shown in FIGS. 4A to 4C, a pavement common to or different from the pavement on the back side thereof, that is, on the side opposite to the pavement R as necessary. A ground structure H such as a walkway is constructed by a conventionally known construction method. In addition, when the ground structure H constructed on the back side of the PC structure Q is an asphalt pavement layer as described above, the back side wall surface to be joined that is opposed to the pavement layer constituting them. It is preferable that the asphalt adhesive layer L is also formed on W as described above.

  In addition, also in the PC structure Q shown in FIGS. 4A to 4D, as in the case shown in FIG. 1, the antifouling film F is applied to the wall surface exposed from the pavement after installation as necessary. Are releasably bonded.

[Form of PC structure corresponding to drainage pavement layer and construction mode of pavement layer]
In the PC structure Q corresponding to the drainage pavement layer, a drainage passage for discharging rainwater that permeates the water-permeable pavement layer to a drainage channel drilled in the block or on the surface is usually provided on the bonded wall surface W. In this case, the asphalt adhesive layer L is formed on the wall surface W to be joined except for the opening of the drainage passage.

  For example, in FIG. 5A, the illustrated PC structure Q is a kind of water channel block, and a circular drainage channel 2 is bored therein, and a plurality of drainage holes communicating with the drainage channel 2 are formed on the upper wall surface. 3 is penetrated, and a guide groove 4 for communicating them is formed.

  In the PC structure Q, the wall surface W to be bonded facing the pavement layer S of the pavement R on the front side at the time of installation is formed by connecting an inclined wall surface Wb and a vertical wall surface Wa extending downward, The wall surface Wb is provided with a plurality of drainage holes 7 that lead to the drainage channel 2 and a guide groove 8 that communicates them, and the drainage hole of the inclined wall surface Wb in the joined wall surface W. Asphalt adhesive layer L is formed on the portion excluding 7 and its guide groove 8, and the upper wall surface exposed from pavement R after installation includes drainage hole 3 and its guide groove 4 to prevent contamination. F is detachably bonded, and the drawing shows a state of starting peeling after installation.

  During the installation work, a pavement layer S composed of a surface layer Sc, a base layer Sb, and the like is constructed through each asphalt adhesive layer L on each of the surfaces along the bonded wall surface W. The surface layer Sc composed of layers is constructed along the inclined wall surface Wb of the bonded wall surface W, and the base layer Sb composed of a water-impermeable pavement layer and the roadbed Sa below are constructed along the vertical wall surface Wa of the bonded wall surface W. Is done.

  After the installation of the PC structure Q, the rainwater flowing on the surface Sc of the rainwater that has fallen on the pavement R flows out into the drainage channel 2 through the drainage holes 3 and the guide grooves 4 on the upper wall surface, Further, the rainwater that has permeated through the surface layer Sc is prevented from entering the subsequent pavement layer by the base layer Sb composed of the non-permeable pavement layer, and is drained through the drain hole 7 and the guide groove 8 in the inclined wall surface Wb. 2 flows out.

  Further, in the PC structure Q shown in FIG. 5B, the exemplified PC structure Q is a boundary formation / water channel block, and a rectangular tubular drainage channel 2 is bored inside, and the drainage is formed in front of the upper wall surface. A plurality of drain holes 7 that lead to the passage 2 are penetrated, a guide groove 8 that communicates them is drilled, and a plurality of drain holes 3 that lead to the drain passage 2 are penetrated behind the upper wall surface. In addition, a guide groove 4 for communicating them is formed, and a boundary forming piece 5 projects from the rear of the upper wall surface, and a plurality of drain holes 3 on the rear of the upper wall surface are formed on the bottom surface of the boundary forming piece 5 and A guide cavity 9 communicating with the guide groove 4 is formed, and a plurality of water guide holes 10 communicating with the guide cavity 9 are formed in the front wall surface of the boundary forming piece 5.

  In the PC structure Q, the wall surface W to be bonded facing the pavement layer S of the pavement R on the front side at the time of installation is lower than the plurality of water introduction holes 10 on the front wall surface of the boundary forming piece 5. The partial inclined wall surface We, the horizontal wall surface Wd of the PC structure Q, the downwardly inclined wall surface Wb, and the vertical wall surface Wa are sequentially connected in a stepped manner, and the drain hole 7 in the upper wall surface in the bonded wall surface W. In addition, an asphalt adhesive layer L is formed on the portion excluding the guide groove 8, and the antifouling film F for preventing contamination can be peeled off on the upper wall surface and the upper front wall surface of the boundary forming piece 5 exposed from the pavement R after installation. In the drawing, the state of starting peeling after installation is shown.

  During the installation work, a pavement layer S composed of a surface layer Sc, a base layer Sb, and the like is constructed through each asphalt adhesive layer L on each of the surfaces along the bonded wall surface W. The surface layer Sc composed of a layer extends along the partially inclined wall surface We and the horizontal wall surface Wd of the bonded wall surface W, and the base layer Sb formed of a water-impermeable pavement layer extends along the inclined wall surface Wb of the bonded wall surface W. Each Sa is constructed along the vertical wall surface Wa of the bonded wall surface W.

  After installation of the PC structure Q, rainwater flowing on the surface Sc of rainwater that has fallen on the pavement R flows into the water guide hole 10 and the guide cavity 9 on the front wall surface of the boundary forming piece 5 and the drainage hole on the upper wall surface. 3 and the guide groove 4 sequentially flow into the drainage channel 2, and rainwater that has passed through the surface layer Sc flows into the drainage channel 2 through the drain hole 7 and the guide groove 8.

Q PC structure H Ground structure R Pavement S Pavement layer Sa Subbase Sb Base layer Sc Surface layer W Joined wall surface Wa Vertical wall surface Wb Inclined wall surface Wc Curved wall surface Wd Horizontal wall surface We Partially inclined wall surface L Asphalt adhesive layer F Antifouling film 2 Drainage Road 3 Drain hole 4 Guide groove 5 Boundary forming piece 6 Drain channel 7 Drain hole 8 Guide groove 9 Guide cavity 10 Water guide hole 11 Basic crushed stone 12 Uniform concrete 14 Heating device 15 Protective film 16 Fine particles 21 Asphalt coating layer 22 Asphalt sheet 23 Sheet Base material 24 Asphalt material

Claims (8)

  In the PC structure installed in the area of the asphalt pavement or along the side edge thereof, the asphalt adhesive layer is formed on the wall to be joined that is bonded to the pavement layer of the pavement at the time of installation. PC structure.   In a PC structure installed within or along the side edge of an asphalt pavement including a drainage pavement layer formed by laminating a water permeable pavement layer on a non-permeable pavement layer, a drainage channel is provided inside or on the surface. A drainage means for draining rainwater that permeates the water-permeable pavement layer into the drainage channel is provided in a wall surface portion of the wall surface to be joined facing the water-permeable pavement layer at the time of installation. The PC structure according to claim 1, wherein an asphalt adhesive layer is formed on the wall surface to be joined except for a hole for the draining means.   The PC structure according to claim 1 or 2, wherein the bonded wall surface is partially or entirely formed to expand downward.   The PC structure according to any one of claims 1 to 3, wherein the asphalt adhesive layer is made of an asphalt sheet in which an asphalt material is supported on a porous, impregnated sheet base material.   The PC structure according to any one of claims 1 to 4, wherein a protective film is releasably coated on the surface of the asphalt adhesive layer.   The PC structure according to any one of claims 1 to 4, wherein fine particles made of a heat-resistant material are attached to the surface of the asphalt adhesive layer.   The PC structure according to any one of claims 1 to 6, wherein an antifouling film is detachably bonded to a wall surface exposed from the paved land after installation.   A step of installing and fixing the PC structure according to any one of claims 1 to 7 in an asphalt pavement area or a planned pavement area or along a side edge thereof, and a wall surface to be joined in the PC structure that has been installed and fixed A step of heating and melting the asphalt adhesive layer on the top and a pavement made of the heated asphalt mixture are laid and compacted along the wall surface to be joined of the PC structure, whereby the pavement is made into a PC structure. A method of installing a PC structure, comprising: adhering to a bonded wall surface of a body via an asphalt adhesive layer and constructing a pavement layer along the bonded wall surface.

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