JP2019183409A - Manufacturing method for roadbed module in road unit consisting paved road structure, and construction method for road surface - Google Patents

Abstract

To provide a method to manufacture easily and inexpensively a roadbed module constituting road surfaces of curved paved roads, and a method to construct road surfaces using the roadbed modules.SOLUTION: A manufacturing method for a roadbed module comprises: a process which divides a prescribed range of a to-be-constructed paved road into segment areas at appropriate intervals in the extension direction, and makes each of the segment areas to be a quadrilateral-shape segment area that is formed with four sides composed of two dividing lines and two side edge lines located on both sides in the breadth direction; a process to create a space corresponding to the segment area with four mold boards; and a process to cast concrete into the space surrounded with the mold boards. The process to make segment areas is categorized into a case of a straight road where the to-be-constructed paved road is straight in the extension direction and a case of a curving road where the road curves in the extension direction. Both side edge lines of a segment area in the curving road are shaped by replacing arc-shaped edges formed on both sides in the breadth direction with chords. In the method of constructing the road surface of the curving road, adjacent roadbed modules are installed by abutting against each other on their long sides.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method of manufacturing a roadbed module and a method of building a road surface that constitute a road surface in a paved road structure constructed by a predetermined number of road units.

  As is well known, the general construction method of paved roads is to excavate the road construction area to an appropriate depth, and the foundation ground after excavation is used as the road body, and the road bed is constructed on the surface of the road body. In addition, a roadbed is constructed and a pavement surface is constructed on the top. In addition to asphalt pavement, the pavement surface is concrete pavement, and in all cases, the road surface is constructed smoothly. The roadbed is constructed exclusively by depositing sand etc., and has the function of transmitting the upper layer distributed load to the road body while eliminating the upper layer's unevenness and the road body's unevenness. . In addition, the roadbed is provided when building a strong road, such as a roadway, and is built exclusively by quarrying, etc., and has the function of receiving the distributed load of the upper layer such as the road surface and maintaining the entire pavement part. Have.

  By the way, in the above-mentioned case, it will be due to excavation work, sediment accumulation work and pavement work, but these are all carried out at the construction site, and the quality of the paved road to be constructed is Had to rely on the ability of In addition, since these constructions are constructed at the construction site, the construction period is prolonged, and the construction period is further prolonged if a period in which construction is impossible in rainy weather is included. The extension of the construction period has caused a problem that the period during which the road cannot pass is prolonged particularly in repair work. In addition, when infrastructure elements are buried in roads, large-scale construction such as excavation of paved roads is necessary for installation, repair, expansion or change, and the inoperable period has been prolonged.

JP-A-8-128006 JP-A-10-280602

  In order to eliminate the above-mentioned prolonged construction, Patent Document 1 discloses a method for constructing a pavement surface in a wide range by manufacturing a precast concrete plate and joining it. The purpose of this technology was to replace old floor slabs and road pavements in a short construction period. Patent Document 2 discloses a technique for constructing a lithographic structure over a wide range such as a factory floor slab or an airport taxiway. In this technique, a plurality of plate-like bodies are connected by fastening members, and a plate-like unit formed thereby is further connected.

  However, in these construction methods, in order to construct a lithographic structure in a wide range, individual plate units are formed and then connected in the vicinity of the edge of these plate units. Therefore, it is not necessary to construct a curved region as in the case of constructing a paved road. That is, since the paved road has a curved road that curves in the left-right direction in addition to the straight road, the construction method for constructing a wide plane cannot be adopted as it is.

  When constructing a curved road as described above by the same kind of construction method, it may be assumed that precast concrete having a predetermined shape (a shape corresponding to a curved region) is constructed in advance and connected at a construction site. However, the curvature of curves on general paved roads is not constant, and is not necessarily arcuate, so many types of molds with different curvatures and shapes must be manufactured in advance, and the manufacturing cost for that. In addition, expenses such as maintenance costs can be enormous.

  Further, as a method for constructing a curved road while using precast concrete, as shown in FIG. 7, a method using rectangular precast concrete is conceivable. However, when rectangular precast concrete is used on a curved road, a gap H2 on the outer peripheral side is larger than a gap H1 on the inner peripheral side of the curved road surface. As a result, the gaps H1 and H2 are generated. The area covered (hatched in the figure) must be concreted separately, and the work for that will require additional construction, which will increase the construction period and increase construction costs. Was invited.

  The present invention has been made in view of the above-described points, and provides a method for easily and inexpensively manufacturing a roadbed module constituting a foundation module of a curved paved road, and a road surface construction method using the roadbed module. With the goal.

  As a result of earnest research to solve this problem, the present inventor has conceived of building a road by constructing elements necessary for the road as a unit of a predetermined unit and joining them. By developing and embodying this idea, the present invention described below has been completed.

≪Method of manufacturing roadbed module≫
(1) A method for manufacturing a roadbed module according to the present invention includes a roadbed module laid on a road body, a roadbed module stacked on the roadbed module, and an elastic structure module installed on the roadbed module. A pavement road structure in which a surface layer module is laminated on the upper layer of a foundation module including the above, and road units formed by these in units of desired units are continuously installed in the width direction and the extension direction of the pavement road. In the method of manufacturing the roadbed module, the entire area of the paved road to be constructed is a road area, and when the road area is divided at an appropriate interval in the extending direction, each area is divided into two dividing lines and a width. A divided region setting step for setting as a four-sided divided region formed by four sides of two side edge lines located on both sides in the direction, and the four sides of the divided region A mold installation step for forming a space corresponding to the divided region by a mold for forming a corresponding wall surface, and a placement step for placing concrete in a space surrounded by the mold, The divided region setting step is divided into a case where the paved road to be constructed is a straight road linear in the extending direction and a case of a curved road curved in the extending direction, and the divided region in the curved road is The both side edge lines are set by replacing arcuate edge edges formed on both sides in the width direction with strings.

  In the paved road structure, a road unit of a desired unit is formed by the foundation module and the surface layer module, and the entire road can be constructed by continuing the road unit in the width direction and the extension direction of the paved road. The foundation module may be only the roadbed module, but the foundation module of the paved road structure used as the roadway is constructed by laminating the roadbed module, the roadbed module and the elastic structure module exclusively. . These modules are manufactured in advance in a factory, and in a road construction site, a paved road structure is constructed by sequentially installing them according to a predetermined procedure. Since this paved road structure is constructed in units of road units, it is not necessary to excavate the road construction area extensively when constructing a new road, and it is necessary to construct everything on-site. There is no. In road repair work, only the road unit at the repair point can be replaced.

(2) According to the method for manufacturing a roadbed module of the present invention, the predetermined area (road area) of the paved road to be constructed is divided in advance into a plurality of divided areas by the divided area setting step, and this divided area is a unit. A roadbed module can be manufactured. The division area at this time is set to a quadrilateral shape with a division line for dividing the road area in the extending direction of the paved road and both side edge lines located on both sides in the width direction. As in the case of manufacturing as concrete, it is possible to manufacture by placing concrete in a space portion surrounded by four molds. Also, even on curved roads, the edge lines located on both sides in the width direction are replaced with arcs (curved lines) instead of chords (straight lines), so the divided areas on the curved roads are also quadrilateral, basically A roadbed module can be manufactured using four molds. In addition, when the dividing lines when setting the divided areas are set at equal intervals in the extending direction of the paved road, the same shape of the precast concrete is used to form a plurality of divided areas with the same formwork as long as it is limited to straight roads. Corresponding roadbed modules can be manufactured.

  The divided areas set by the divided area setting process are divided into two types, straight roads and curved roads. Therefore, both are set individually, and the molds corresponding to these different divided areas are individually set. It is also envisaged to produce it. However, when these are manufactured individually, the types of molds become enormous, which may increase the manufacturing cost. Therefore, the respective divided areas are set so that one of the side edge lines forming the divided areas on the curved road has the same length as the both side edge lines forming the divided areas on the straight road. It is. As a result, at least the formwork for configuring the wall surface corresponding to the side edge lines of the divided area on the curved road is the same as the formwork for forming the wall surface corresponding to the side edge lines of the divided area on the straight road. You can use it. In addition, if the dividing line is limited to the width direction (direction orthogonal to the extending direction) and the length is constant (same as the width or 1/2 or 1/3 thereof), the straight line and the curved road A common frame can be used for forming the wall surface corresponding to the dividing line of the divided areas in both.

(3) Therefore, if it is assumed that the dividing line coincides with the width direction (direction orthogonal to the extending direction) and the length thereof is constant, the dividing area on the straight road is a rectangular area. Thus, the divided areas on the curved road are set as trapezoids. If the trapezoid at this time is set so that either the upper base or the lower base has the same length as the short side of the rectangle, the formwork to be used has a wall surface corresponding to the other of the upper base or the lower base. It is possible to cope with various shapes only by changing what is to be configured.

  As described above, by setting two types of divided areas for the rectangle and the trapezoid, the manufactured roadbed module also has two types of rectangle and trapezoid in plan view. In this sense, the present invention can be grasped as an invention of a roadbed module for constituting a curved road. For example, in each region when a curved road is divided by a dividing line that coincides with the width direction, it has a plan view corresponding to a trapezoid in which two curved side edge lines located on both sides in the width direction are replaced with strings. It can be configured with a roadbed module. The curved road in this case can be a road surface of the curved road as a whole by appropriately arranging a plurality of trapezoidal roadbed modules in plan view.

  The roadbed module can also be configured by an RC version having a reinforcing bar inside. In this case, a process for providing an internal reinforcing bar is added after the mold installation process. It is also possible to configure the roadbed module with a PRC plate by arranging a tension material to which a tensile load is applied in advance. In this case, a step of disposing a tendon and a step of pulling the tendon are added. These additional steps can be appropriately selected.

≪Road construction method≫
(1) A method for constructing a road surface of a curved road according to the present invention includes laying a roadbed module on a road body, stacking a roadbed module on the roadbed module, and installing an elastic structure module on the roadbed module. In the method for constructing a road surface of a paved road by a road unit in which a surface layer module is laminated on the upper layer of the foundation module, the entire area of the paved road to be constructed is defined as a road area, and the road area is extended. Each area when divided in an appropriate interval in the direction is a quadrilateral-shaped divided area formed by four sides of two dividing lines and two side edge lines located on both sides in the width direction. A roadbed module is pre-manufactured with precast concrete every time, and the roadbed module is placed on top of the foundation unit while the end faces corresponding to the dividing lines are in contact with each other. Laminating Le, and wherein the interconnecting adjacent roadbed module.

  According to the road surface construction method of the present invention, the roadbed module constituting the road surface of the paved road structure is manufactured for each divided region set in advance, and the entire roadbed can be constructed by combining them. it can. At this time, the roadbed module is configured in a rectangular shape in plan view for a straight road, and in a trapezoidal shape in plan view for a curved road. can do.

(2) Here, as a roadbed module for constructing a curved road, a trapezoidal plan view is used, but in a roadbed module having a trapezoidal plan view, the width side edge is curved. It seems that the roadbed module is straight and there is a discrepancy with the road surface shape. However, on an actual paved road, especially a roadway, the curvature of the curved portion is very large, and even a curve with a small curvature has a radius of about 50 m at most. Therefore, strictly speaking, the width-side edge is arcuate, but in reality it is almost a straight line, so there is a difference between the actual width-side edge and the edge of a trapezoidal roadbed module in plan view. It is not something that produces

≪Others≫
The terms “unit” and “module” used in the present invention do not indicate only a single body, but may be a state in which a plurality of units and modules are gathered. That is, the road unit does not only mean a state in which the modules are combined, but also means an aggregate constructed as a result of being stacked on the construction site. The unit means that the unit can be classified with a predetermined size as a unit. Similarly, a module is not limited to a single member, but also means an assembly of a plurality of members. For example, a single module is formed by stacking the same or different types of components. There is a case.

  In the present specification, the paved road may be simply referred to as a road, and the paved road is configured by a paved road structure in which road units are continuous in the width direction and the extension direction. Therefore, the paved road is continuous in the extending direction while forming a predetermined width. Such paved roads are divided into a straight state in the extending direction (straight road) and a curved state (curved road) in the extending direction (curved road). In the present invention, the roadbed for constituting the straight road A module and a roadbed module for constituting a curved road are distinguished and manufactured. The curved road in this case is not limited to an arc shape but may be a complex curve, but even a complex curve can be considered as a set of arcs. The basic configuration will be described. Further, in this specification, a sidewalk means a paved road through which vehicles do not pass, and may be used in a typical sense exclusively for an area where infrastructure elements are buried. In addition, the term “roadway” means a paved road exclusively intended for vehicle traffic, but may be used in a typical sense in an area where no infrastructure elements are embedded. Even on a single paved road, the shoulder may be a sidewalk and the center may be a roadway.

It is a schematic diagram which shows an example of a road unit. It is the schematic which shows the construction example of a paved road structure. It is the schematic which shows the outline of a paved road, and the structure of a curved road. It is explanatory drawing which shows an example of the manufacturing method of a rectangular roadbed module. It is explanatory drawing which shows an example of the manufacturing method of a trapezoid roadbed module. It is explanatory drawing which shows the example in the case of building the road surface in a curved road. It is explanatory drawing which shows the outline of the conventional construction method of a curved road.

  One or two or more components arbitrarily selected from the present specification may be added to the above-described components of the present invention. The contents described in this specification correspond not only to the manufacturing method or the construction method of the present invention, but also to the roadbed module manufactured by the method, and further appropriately to the construction method for the entire road. Which embodiment is the best depends on the target, required performance, and the like.

≪Road unit≫
The roadbed module manufactured and used according to the present invention is used for a paved road structure constituted by road units. First, the outline of the configuration of the road unit and the paved road structure will be described. The road unit is configured by laminating a plurality of modules, and is formed as a whole by arranging individual modules at predetermined positions. A surface layer module is laminated on the uppermost layer, and a basic module is provided on the lower layer. The basic module is provided with an individual module as necessary depending on the application. The uppermost surface layer module constitutes a paved road surface, and is connected to a general road surface.

  The form of the road unit can be roughly divided into two types. A 1st form is a structure by which the roadbed module was provided in the lower layer of the surface layer module, and a foundation module is a form formed only with a roadbed module. This type of road unit is applied to a sidewalk or the like where the load from the road surface is relatively small. A 2nd form is the structure using a roadbed module and an elastic structure module other than a roadbed module as a basic module. Specifically, a roadbed module is laid on the surface of the road body, a roadbed module is laminated thereon, an elastic structure module is further laminated, and a surface layer module is arranged as the uppermost layer. This type of road unit is applied to a roadway having a relatively large load from the road surface. In any form, a surface layer module is laminated on the uppermost layer to constitute the surface of the paved road surface.

  The road bed module is embedded in the road body, absorbs the unevenness of the road body, transmits the distributed load acting from the road surface and the like to the road body, and supports the entire road unit. Moreover, the function which absorbs the unevenness which arises in the other module laminated | stacked on the upper part may be exhibited. For example, it can be constituted by a low-foam synthetic resin foam block molded body, and the unevenness of the road body and the like can be absorbed by utilizing the deformability of the synthetic resin foam block. The elastic structure module is disposed between the roadbed module and the surface layer module, and transmits the load received by the surface layer module during travel of the vehicle or the like to the roadbed module. That is, the elastic structure module is laminated in a state of supporting the surface layer module, and when the surface layer module is deformed by a load on the surface layer module, the elastic structure module is elastically deformed according to the deformation. The load is absorbed by the deformation. The road unit is in a state of being unitized with a desired unit, and each unit may be singular, but some or all of the modules may be composed of a plurality of aggregates.

  Specific examples of these are shown in FIGS. FIG. 1A illustrates the first embodiment described above, and FIG. 1B illustrates the second embodiment described above. In the figure, each module has the same area in plan view and is stacked to form the road units 100 and 200, but these modules are divided into a plurality in plan view. There may be a form in which small modules (divided) are assembled.

  As shown in FIG. 1A, the road unit 100 according to the first embodiment includes a surface layer module 1 and two roadbed units 2 stacked one above the other. The foundation module 20 in this case is constituted by only two roadbed modules 2.

  As shown in the figure, the modules 1 and 2 are originally manufactured individually and integrated at a construction site. In the construction site, the road unit 100 can be formed by stacking the modules 1 and 2 having a predetermined size. However, when a plurality of road units 100 are connected, it may be necessary to connect adjacent portions. The connection of the roadbed module will be described later.

  As shown in FIG. 1B, the road unit 200 according to the second embodiment is configured such that the foundation module 20 includes a roadbed module 2, a roadbed module 3, and an elastic structure module 4. In the lowermost layer, a roadbed module 2 to be embedded in the road body is provided, a roadbed module 3 is laminated on the upper layer, a base portion is formed, and an elastic structure module 4 is disposed in the middle of the surface layer module 1. As described above, the elastic structure module 4 is disposed in the upper layer of the roadbed module 3.

  The road unit 100 of the first form is for constructing a road that should be exclusively used as a sidewalk, and the road unit 200 of the second form is used exclusively for a road that should be a roadway. In principle, the infrastructure element is embedded in the roadbed module 2 in the road unit 100 of the first form that exclusively constitutes the sidewalk, but the road unit 200 of the second form also includes the roadbed. Since the module 2 is installed, it may be exceptionally embedded in the roadbed module 2 constituting the road unit 200.

  The surface layer module 1 constitutes a road surface, and its surface is constituted as a smooth state. For example, in the case of a roadway, this surface layer module maintains the durability as a paved road surface by receiving a load from the vehicle and distributing it to the lower layer, and continues to function as a paved road surface. To get. Therefore, specifically, it is comprised by the plate-shaped member of precast concrete.

  The elastic structure module 4 is made of an elastically deformable material. For example, the elastic structure module 4 can be elastically deformed structurally such as having a spring-like structure, or can be elastically deformed due to material properties such as an elastomer. Is used.

≪Method of forming paved road structure≫
FIG. 2 shows a method for forming a paved road structure. The formation method of a paved road structure is a construction method of a paved road. Here, the case where the road unit 200 according to the second embodiment is used will be exemplified. As described above, the road unit 200 is configured as a stacked body of a plurality of modules 1 to 4. In construction, the road unit 200 is configured by stacking in the road construction area, and this is continued. To build paved road structures.

  Therefore, first, as shown in FIG. 2A, the road construction area is excavated, and the excavated ground functions as the road body 10. The road bed module is constructed by laminating the road bed module 2 on the surface of the road body 10 and laminating it at an appropriate depth (height) (see FIG. 2B). When the roadbed is constructed, the roadbed module 3 is stacked on the upper layer (see FIG. 2C), and the roadbed is constructed. At this time, in order to facilitate the connection with the lower roadbed module 2, it is preferable to fit the protruding portion and the concave portion, and the same may be applied to the joining with another adjacent roadbed module 3. Preferred (see FIG. 2D).

  After that, the elastic structure module 4 is laminated on the upper layer of the roadbed module 3 (see FIG. 2 (e)), and the surface layer module 1 is further laminated on the upper layer to form a road unit. 2C to 2E, the roadbed module 3 and the elastic structure module 4 are integrated by providing a protrusion (for example, a needle-like protrusion 30) on the upper surface of the roadbed module 3. It can be made to. The standing projections 30 may be integrally formed at the time of manufacturing with precast concrete, but a recess may be formed in advance on the upper surface of the roadbed module 3, and a rod-shaped member may be inserted into the recess. Further, the needle-like protrusion 30 may reach the surface layer module 1. In this case, the surface layer module 1 can also be positioned. The road unit is continuously arranged in the width direction and the extension direction of the road, so that a desired paved road structure can be constructed and used as a paved road as a whole.

≪Configuration of roadbed module≫
The roadbed module used for the road unit is provided separately for straight roads and curved roads. The shape of the roadbed modules constituting the straight roads is rectangular in plan view, and the roadbed modules constituting the curved roads are trapezoidal in plan view. Yes. Basically, a divided area that divides the entire area of the paved road (road area) into a plurality of areas is set, and a roadbed module with the set area as a unit is provided. The planar shape of the roadbed module (divided area shape) is formed by dividing the paved road with a straight line that matches the width direction and the dividing line and both side edge lines located on both sides of the width direction. Yes. In the case of straight roads, if the dividing line is the long side of the rectangle and the edge lines on both sides are the short sides, the road surface is continuous in the extending direction of the paved road by aligning the long sides in contact with each other. Is configured. On the other hand, in the case of a curved road, the dividing line is a trapezoidal hypotenuse and both side edge lines are the upper and lower bases. At this time, since both side edge lines (edges on both sides in the width direction) of the curved road are curved, a trapezoid is formed by replacing the curved part with a straight line. The curved portion is not necessarily an arc, but can be assumed to be an arc, and a desired trapezoid can be easily formed by using a chord instead of the arc to form both side edge lines.

  The above-mentioned both side edge lines are not necessarily both end edges in the width direction, but may be divided into a plurality of width directions. This is a case of dividing at equal intervals of 1/2 or 1/3 in the width direction. Such a division is also possible because the overall width increases when the number of lanes on the paved road to be constructed is large. In that sense, the side edge lines are located on both sides of the width “direction”. In this case, for example, when assuming an arc-shaped curved paved road, the side edge lines are divided by concentric circular arcs, and are divided into a trapezoid having a large area and a trapezoid having a small area. If the upper base of the large trapezoid has the same length as the lower base of the small trapezoid, the trapezoid can be formed as a whole by continuing these trapezoids in the width direction. In that sense, it can be assumed that the dividing line has the same length as the width, and that both side edge lines are composed of both side edges of the width, and can be divided in the width direction when the width is large. It may be recognized as something.

  A specific form of this roadbed module is shown in FIG. This figure illustrates the shape of the road surface in plan view, and is a state constituted by a plurality of roadbed modules. The curved road shown in the figure has an arc shape and is illustrated as not being divided in the width direction. The curvature is exaggerated for convenience of explanation. As shown in FIG. 3A, the paved road A can be constructed as a paved road having a predetermined path length as a whole by combining the straight roads A1, A2 and the curved road A3 continuously. . That is, a curved road A3 is provided continuously with the straight road A1, and a next straight road A2 is provided continuously with the curved road A3, whereby a paved road having a curved portion is constructed. . Since the normal curved road A3 is configured with the same width as the straight roads A1 and A2, when it is assumed that the curved road A3 is curved in an arc shape, an outer peripheral portion and an inner peripheral portion of the curved road A3 Are concentric arcs with the same center point O. That is, the difference between the radius R1 of the outer peripheral portion and the radius R2 of the inner peripheral portion coincides with the width length.

  Therefore, as shown in FIG. 3B, a plurality of divided areas can be provided by dividing the curved road A3 by a line (dividing line) that coincides with the width direction (the figure shows one divided area). ). At this time, since the edges of the outer peripheral portion and the inner peripheral portion are arcuate, the trapezoidal divided region A31 can be formed by linear both side edge lines by substituting this with a string. In addition, on a straight road, it is possible to form a rectangular divided region A21 by dividing at a predetermined interval B by a dividing line that coincides with the width direction. The rectangle at this time has the width L as the length of the long side and the division interval B as the length of the short side.

The trapezoidal divided area A31 on the curved road A3 as described above can be formed as an isosceles trapezoid. Accordingly, the base angle θ ₁ on the upper base side is equal to each other, and the base angle θ ₂ on the lower base side is also equal to each other. Therefore, these base angles θ ₁ and θ ₂ have the following relationship.

Accordingly, if the lower base length B of the trapezoid (divided area) A31 is determined on the curved road where the curvature (radius of the outer peripheral portion) R1 is determined, the respective base angles θ ₁ and θ ₂ are calculated. It can be done. Here, since the length B of the lower base is made equal to the division interval (rectangular short side) B on the straight road, if the division interval is determined, the trapezoidal division area A31 on the curved road is determined. It becomes possible to specify the shape of the.

Instead of the above, the length C of the upper base of the trapezoid A31 can be set equal to the division interval B on the straight road. In this case, the calculation of the base angles θ ₁ and θ ₂ is different only in the calculation method of θ ₀ . In other words, “B” in the above-mentioned relational expression is “C”, and “R1” is “R1-L”.

  Thus, by making each dividing line a straight line that coincides with the width direction, the length L of the dividing line becomes constant, and the upper or lower base of the trapezoidal divided area A31 that forms the curved road The reason why the length is set equal to the division interval B on the straight road is to use the formwork in common.

≪Formwork configuration≫
The formwork differs depending on whether a roadbed module corresponding to a rectangular divided area is configured or a roadbed module corresponding to a trapezoidal divided area. Since it is constituted by a quadrilateral with edge lines, a common formwork can be used by forming a wall surface with four formwork individually for these four sides. That is, the length L of the dividing line is the same, and the dividing interval B is the same as the length of either the upper base or the lower base of the trapezoid, so that the wall corresponding to the straight portion having the same length is formed. The formwork to be used can be used for both.

≪Method of manufacturing roadbed module≫
The manufacturing method of the roadbed module is to set the divided area by the method as described above (divided area setting step), and select four molds that can form a wall of a predetermined length from the molds that are prepared in advance. These molds surround the four sides forming the divided area, and form a space corresponding to the divided area (formwork installation step). The four molds surrounding the four sides of the divided area can be connected by bringing the contact portions into contact with each other by providing contact portions that can contact each other.

  A specific form of the manufacturing method is shown in FIGS. 4 shows a manufacturing method of a roadbed module used on a straight road, and FIG. 5 shows a manufacturing method on a curved road. Each figure shows a figure in plan view.

  As shown in FIG. 4 (a), the roadbed module used for the straight road is rectangular in plan view, so that two long side molds 5 and two short side molds 6 are provided. use. Abutting portions are provided in the vicinity of both side edges of each of the molds 5 and 6, and the abutting portions are brought into contact with each other to surround the periphery of a predetermined rectangle (divided region A21) in plan view. be able to. At this time, as shown in FIG. 4 (b), the abutting portions are abutted against each other and fixed by the fastening member 7. In the example of the drawing, a bolt and a nut are used as the fastening member, and the bolt is configured to penetrate both contact portions that contact each other. For this reason, the contact portion is provided with a through-hole that allows a bolt to penetrate in advance.

  The fastening member 7 is provided at a plurality of locations in the depth direction (perpendicular to the drawing sheet) and can be firmly connected, and the four molds are not separated when placing concrete. It is said. Further, a seal member may be interposed between the contact portions that contact each other. An elastic member such as rubber packing can be used as the seal member.

  On the other hand, when manufacturing a roadbed module for use on a curved road, as shown in FIG. 5 (a), two long-side molds 5 are used as oblique-side molds, The short side mold 6 is used as a mold for the lower base. Furthermore, the upper bottom side mold 8 that is shorter than the lower bottom mold (short-side mold) 6 surrounds the area of the trapezoidal area (divided area A31). Even in this case, the contact portion is fixed by the fastening member 7 as shown in FIG.

  Here, the mold frame 6 disposed on the lower bottom side and the mold frame 8 disposed on the upper bottom side are different in length from each other, and in the middle, the long side mold frame disposed for the hypotenuse. 5 is arranged, but the formwork 5 is inclined according to the base angle of the trapezoid. Accordingly, the one abutting portion 51 of the long side mold 5 and the abutting portion 61 of the lower bottom mold 6 are slightly in contact with a corner. Therefore, the seal member 9 may function as a spacer by interposing a seal member 9 having a triangular cross section between the contact portions 51 and 61. The installation of the seal member 9 functioning as such a spacer enables fastening with a fastening member. In addition, although it is good also as a structure which can change an angle freely about either contact part 51 and 61, the adjustment by a spacer is easy. Similarly, since the other abutting portion 52 of the long side mold is also in contact with the abutting portion 81 of the upper bottom mold 8, a seal with a triangular cross section is also formed on this portion. It can be adjusted by interposing the member 9. Since the sealing member 9 at this time is disposed on the inner side (space forming side) of the mold, it has a particular significance of having a sealing effect.

  FIG. 5B shows an exaggerated inclination, but in reality, it is slightly inclined. Therefore, a change in the form size due to the presence of the seal member 9 does not cause a substantial error. In addition, the nut shown in the figure is inclined with respect to the surface of the formwork, but this is also in a state of being in close contact with the surface of the formwork when fixing the actual formwork. is there.

≪Road construction method≫
The roadbed module manufactured in advance as described above is carried in and installed in the construction site of the paved road. At this time, the roadbed module for configuring the straight road and the roadbed module for configuring the curved road have different shapes as described above. Accordingly, only a roadbed module having a rectangular shape in plan view is used for a portion where a straight road is to be constructed, and only a roadbed module having a trapezoidal shape in plan view is used for a portion where a curved road is to be constructed. Specifically, as described above, the roadbed module having a rectangular shape in plan view is provided with a constant length so that the length of the long side is the same as the width (or 1/2 of the width). By aligning the end faces on the side side in contact with each other, they are continuously provided in the extending direction of the road. Also, in the trapezoidal roadbed module in plan view, the length of the hypotenuse side is the same as that of the long side of the rectangle, so the end face of the long side of the rectangle and the trapezoidal shape even at the boundary where the road changes from a straight road to a curved road In this case, the roadbed module on the curved road can be installed in succession to the roadbed module on the straight road. In addition, since all the roadbed modules on curved roads have the same length on the hypotenuse side end face, they can be installed along the bend with the same width (width) by aligning the hypotenuse side end face in contact with each other. .

  A specific form of the curved road construction method is shown in FIG. FIG. 6A shows the case of bending with the same curvature (a state along a single arc), and FIG. 6B shows the case of bending with different curvatures (a state where a plurality of arcs are continuous). ing. As shown in FIG. 6 (a), on a curved road curved with the same curvature, the curved road can be obtained by installing the same shape of the trapezoidal roadbed modules A31 to A35 in plan view while abutting the hypotenuse side end face. The road surface over the entire area can be constituted by the roadbed modules A31 to A35. On the other hand, as shown in FIG. 6B, in the case of a curved road that curves with different curvatures, a plurality of trapezoidal roadbed modules A36 to A39 having different upper base lengths in plan view are different. Arranged according to the curvature. Even in this case, since the length of the hypotenuse is the same, a continuous road surface having the same width (width) can be constituted by various roadbed modules by contacting the hypotenuse side end face.

  Such a roadbed module having a different length of the upper base can be manufactured only by changing the upper base mold 8, and the upper base mold 8 has an appropriate length. If several types are prepared, it can be handled.

DESCRIPTION OF SYMBOLS 1 Surface layer module 2 Subgrade module 3 Subbase module 4 Elastic structure module 5 Long side mold 6 Short side mold 7 Fastening member 8 Upper bottom mold 9 Seal member 10 Road body 20 Base module 30 Needle-like protrusion 100 , 200 Road unit A Paved roads A1, A2 Straight road A3 Curved road A21 Divided area of straight road (or roadbed module)
A31-A39 Curved road division area (or roadbed module)
H1, H2 Gap C Gap for placing concrete

Claims (8)

A surface layer module is stacked on an upper layer of a base module including a roadbed module laid on a road body, a roadbed module stacked on the roadbed module, and an elastic structure module installed on the roadbed module. In the paved road structure in which road units formed into units of desired units are continuously installed in the width direction and the extension direction of the paved road,
A method of manufacturing the roadbed module,
The predetermined area of the paved road to be constructed is a road area, and when the road area is divided at an appropriate interval in the extending direction, each area is divided into two dividing lines and two side edge lines located on both sides in the width direction. A divided region setting step for setting as a quadrilateral-shaped divided region formed by the four sides;
A mold installation step for forming a space corresponding to the divided area by a mold for forming a wall surface corresponding to the four sides of the divided area;
And placing a concrete in a space surrounded by the mold,
The divided area setting step is divided into a case where the paved road to be constructed is a straight road linear in the extension direction and a case of a curved road curved in the extension direction,
The method of manufacturing a roadbed module, wherein the divided areas on the curved road are set such that both side edge lines are replaced by strings of arcuate edges formed on both sides in the width direction.   2. The manufacturing method of a roadbed module according to claim 1, wherein one of the side edge lines of the divided area on the curved road is set by the same length as the side edge lines forming the divided area on the straight road. Method. The dividing line in the divided region setting step is a straight line that matches the width direction of the paved road to be constructed,
The division area on the straight road is set to a rectangle having the dividing line as a long side and the side edge lines as short sides,
3. The divided area on the curved road is set to a trapezoid having one side edge line as an upper base, the other side edge line as a lower base, and the dividing line as a hypotenuse. Method for manufacturing a roadbed module.   The formwork used in the formwork installation step is composed of two long side molds for constituting the wall surface corresponding to the long side and two sheets for constituting the wall surface corresponding to the short side. It is divided into a short-side mold and a single upper-bottom mold for forming the wall corresponding to the upper base, and the mold that forms the wall corresponding to the lower-bottom is the short-side The method for manufacturing a roadbed module according to claim 3, wherein one of the molds is used.   The formwork used in the formwork installation step has a contact portion with which the short-side formwork or the upper bottom-side formwork can contact each other with respect to the long-side formwork, The method for manufacturing a roadbed module according to claim 4, wherein a seal member is interposed when the contact portions are brought into contact with each other.   The mold installation step corresponds to the angle of the hypotenuse of the trapezoid when the abutting portions of the two long side molds, the one short side mold, and the upper bottom mold are brought into contact with each other. The method for manufacturing a roadbed module according to claim 5, wherein a sealing member having an inclined surface is interposed. A roadbed module is laid on the road body, a roadbed module is stacked on the roadbed module, an elastic structure module is installed on the roadbed module to form a foundation module, and a surface layer is formed on the upper layer of the foundation module. In a method for constructing a road surface of a paved road by a road unit in which modules are stacked,
The entire area of the paved road to be constructed is a road area, and each area when the road area is divided at an appropriate interval in the extending direction is divided into two dividing lines and two side edge lines located on both sides in the width direction. It is a quadrilateral-shaped divided region formed by the four sides, and a roadbed module is manufactured in advance by precast concrete for each divided region,
Laminating the roadbed module on top of the roadbed module while abutting end surfaces corresponding to the dividing lines with each other,
A road surface construction method for a paved road, wherein adjacent roadbed modules are connected to each other.   The roadbed module is a combination of a rectangular roadbed module that forms a road surface of a straight road and a trapezoidal roadbed module that forms a road surface of a curved road in an appropriate combination and is stacked on the upper part of the roadbed module. The road surface construction method of the paved road according to claim 7.

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