CN111411558A - Joint body of combined type road surface and combined type road surface - Google Patents
Joint body of combined type road surface and combined type road surface Download PDFInfo
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- CN111411558A CN111411558A CN202010325841.5A CN202010325841A CN111411558A CN 111411558 A CN111411558 A CN 111411558A CN 202010325841 A CN202010325841 A CN 202010325841A CN 111411558 A CN111411558 A CN 111411558A
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
- E01C11/06—Methods of making joints
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C9/00—Special pavings; Pavings for special parts of roads or airfields
- E01C9/002—Coverings, the surface of which consists partly of prefabricated units and partly of sections made in situ
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The application provides a joint body and combined type road surface on combined type road surface, the joint body and the concrete plate on the combined type road surface of this application constitute the basic unit on combined type road surface, the both sides of the joint body are provided with the fourth of twelve earthly branches head of symmetry, one side of concrete plate is provided with the tongue-and-groove that corresponds with joint body fourth of twelve earthly branches head, fourth of twelve earthly branches head and tongue-and-groove constitute the activity extending structure of concrete plate seam crossing. The invention can replace the prior art that the dowel bar steel bar is adopted as the dowel bar of the plate at the joint, so that the stress form at the joint is converted from the shearing resistance of the steel bar to the concrete inclined plane compression, the load transfer capability of the joint and the structural stability are improved, and the capability of preventing the reflection crack of the base layer is improved.
Description
Technical Field
The disclosure relates to the field of road engineering, in particular to a joint body of a composite pavement and the composite pavement.
Background
The warm shrinkage cracks and the reflection cracks are common diseases of rigid-flexible composite pavements. Traditional concrete road base layer is cast-in-place shaping, at the pre-buried dowel steel of road concrete slab crossing position, relies on the dowel steel to transmit vertical load between the seam department plate, and dowel steel one end is fixed with cement concrete slab, and the other end scribbles pitch outside the reinforcing bar, as the slip end. When the temperature difference generates stress along the longitudinal direction of the road, the sliding end of the dowel bar is subjected to telescopic displacement, and the load transfer capacity of the reinforcing steel bars at the joints can be still maintained. When the cement concrete slab is covered with the surface, due to the effects of temperature, load and soil foundation settlement, the uneven settlement of the plates on the two sides of the joint and the change of the width of the joint are easy to generate reflection cracks on the concrete slab at the transverse joint. Not only influences the beauty and the driving comfort of the road surface, but also reduces the service life of the road surface.
Disclosure of Invention
One of the objectives of the present disclosure is to provide a joint body of a composite pavement and a composite pavement, which replace the prior art that uses dowel bars and steel bars as dowel bars of joint plates, so that the stress form at the joint is converted from the shear resistance of the steel bars into the compression of concrete slopes, thereby improving the load transfer capability of the joint, enhancing the structural stability, and improving the capability of preventing the reflection cracks of the base layer.
In order to achieve the above object, according to an embodiment of the present application, the present invention provides the following technical solutions: the utility model provides a joint body on combined type road surface, joint body and concrete plate constitute the basic unit on combined type road surface, the both sides of joint body are provided with the fourth of twelve earthly branches head of symmetry, one side of concrete plate is provided with the tongue-and-groove that corresponds with joint body fourth of twelve earthly branches head, fourth of twelve earthly branches head and tongue-and-groove constitute the activity extending structure of concrete plate joint department.
Furthermore, the whole body of the joint body is a dumbbell-shaped sheet, the left side and the right side of the section of the sheet are both provided with trapezoidal mortise heads, and the midpoint connecting line of the short sides of the trapezoidal mortise heads on the left side and the right side is parallel to the upper edge and the lower edge of the joint body.
Furthermore, each side of the joint body is provided with a single or a plurality of mortise heads.
Furthermore, one of the joint body or the concrete plate adopts prefabricated inorganic binder, and the other adopts cast-in-place inorganic binder.
Further, the joint body or the side of the concrete panel using the prefabricated inorganic binder is coated with a polymer coating having a deformation characteristic.
Further, the polymer coating mainly comprises one or more of polyurethane, fiber and rubber powder.
According to another embodiment of the present application, the present invention further provides a composite pavement, wherein the base layer of the composite pavement is composed of concrete slabs and the joint body according to any one of the above applications.
Compared with the prior art, the invention has the beneficial effects that: the mortise of the joint body provided by the invention can be matched with the mortise of a concrete plate to form a dowel bar structure similar to that used at the joint of a concrete panel, thereby replacing dowel bar reinforcing steel bars in the prior art, and the mortise is used as a space for accommodating the mortise and providing the expansion of the mortise, so that the shearing resistance of an inclined plane can be increased, and the mortise and the inclined plane can cooperatively transmit load.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a perspective view of a joint body of a rigid-flexible composite pavement according to one embodiment of the present application;
FIG. 2 is a top view of a joint body of a rigid-flexible composite pavement according to one embodiment of the present application;
FIG. 3 is a front view of a joint body of a rigid-flexible composite pavement according to one embodiment of the present application;
FIG. 4 is a seamed body-side view of a rigid-flexible composite pavement according to one embodiment of the present application;
FIG. 5 is a schematic view of a joint body of a rigid-flexible composite pavement coated with a polymer coating and combined with a concrete slab according to an embodiment of the present application;
FIG. 6 is a schematic view of a joint body of a rigid-flexible composite pavement according to an embodiment of the present application, assembled in an X-shape;
FIG. 7 is a schematic view of a joint body of a rigid-flexible composite pavement according to an embodiment of the present application laid in a grid-type structure;
FIG. 8 is a schematic view of a base layer assembled from joint blocks of a rigid-flexible composite pavement according to an embodiment of the present disclosure;
FIG. 9 is a cross-sectional view of the overall structure of a seamed rigid-flexible composite pavement according to one embodiment of the present application;
the same or similar reference numbers in the drawings identify the same or similar structures.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.
In order to better understand the technical solutions of the present application, prior to describing the technical solutions of the present application, the related art is further described herein.
The concrete is generally used as a main material of a base layer in rigid-flexible composite road engineering, is a non-homogeneous composite material consisting of multiple materials, and has the properties of thermal expansion and cold contraction, temperature deformation is a main reason of causing surface cracks, deep cracks and through cracks of a concrete structure in the road engineering, the cracks provide passages for air and water to enter the concrete, the concrete is easy to generate carbonization corrosion, and the structural integrity and the durability are reduced.
Traditional concrete road base layer is cast-in-place shaping, at the pre-buried dowel steel of road concrete slab crossing position, relies on the dowel steel to transmit vertical load between the seam department plate, and dowel steel one end is fixed with cement concrete slab, and the other end scribbles pitch outside the reinforcing bar, is the slip end. When the temperature difference generates stress along the longitudinal direction of the road, the sliding end of the dowel bar is subjected to telescopic displacement, and the load transfer capacity of the reinforcing steel bars at the joints can be still maintained. When the cement concrete slab is covered with the surface, due to the effects of temperature, load and soil foundation settlement, the uneven settlement of the plates on the two sides of the joint and the change of the width of the joint are easy to generate reflection cracks on the concrete slab at the transverse joint. Not only influences the beauty and the driving comfort of the road surface, but also reduces the service life of the road surface. The traditional concrete base layer forming process is complicated, steel is used, the construction period is prolonged, and the energy consumption is increased.
In addition, the larger the concrete slab size, the greater the accumulated thermal shrinkage stress. The temperature-shrinkage stress and the strain quantity born by the single plate can be reduced by reducing the size of the concrete plate block, and the top plane area of the concrete plate block of the traditional road bed base layer is between 14 square meters and 22.5 square meters. Larger plate size, large temperature stress and easy thermal shrinkage cracking.
Next, a technical solution of the present application will be described. Before describing the seam body of the present application, please refer to fig. 9 for better understanding of the technical solution of the present invention, and fig. 9 is a cross-sectional view of the overall structure of the seam body type rigid-flexible composite pavement according to an embodiment of the present application.
As shown in fig. 9, the road base layer of the joint body type rigid-flexible composite pavement of the present application may be composed of a joint body 1 and a concrete slab 2. One of the joint body 1 and the concrete plate 2 can be prefabricated, namely, dry forming, and the other can be cast in situ, namely, wet forming. That is, since the joint body 1 and the concrete slab 2 are mutually matched structures, the manufacturing processes of the two can be exchanged, one of the concrete slab and the joint body can be used as a prefabricated member, and the prefabricated member can be used as a template of a cast-in-place member. The materials of the joint body 1 and the concrete plate 2 may be inorganic binders, such as concrete or mortar. In addition, the sequence of prefabricating and filling the joint body 1 and the concrete plate 2 can be exchanged, and the structure of the road base layer can be obtained.
Preferably, only one of the joint body 1 and the concrete slab 2 is prefabricated to form a prefabricated member, for example, the concrete slab is prefabricated first, and a polymer coating, for example, a composite weather-resistant coating 3, is coated on the side surface of the prefabricated member, that is, the road base layer of the joint body type rigid-flexible composite pavement of the present application may be formed by combining the joint body 1 and the concrete slab 2 with the composite weather-resistant coating 3. The coating has certain deformability, so that the interface of the concrete plate 2 and the joint body 1 has certain flexibility to weaken the stress concentration phenomenon, and when the base layer is subjected to temperature shrinkage (or temperature expansion), the high polymer material can be expanded or compressed to weaken the stress through strain. Further, on the base layer, an asphalt concrete surface layer 4 may be laid.
In actual operation, the prefabricated member (which may contain a coating) can be transported into the road groove to be paved according to rules, and then concrete or mortar is poured into the gap to form the base layer. The concrete plate 2 can be prefabricated firstly, and assembled on site after being sprayed with the weather-resistant coating 3, so that a gap of the joint body 1 is reserved, and the whole structure of the base layer is formed by adopting a mode of casting the joint body 1 in situ. For example, precast concrete plates 2 are firstly precast, polymer materials are sprayed on the side faces of the precast concrete plates, the precast concrete plates are transported to a road construction site and are placed according to rules, gaps with the same pattern, size and arrangement mode as the joint body 1 are reserved among the precast concrete plates 2, and joint materials are poured into the gaps to manufacture a cast-in-situ symmetrical force transmission rod type mortise and tenon structure. When the other part of the base layer is poured, the prefabricated part is used as a mold to play roles in fencing and plasticity. After the cast-in-place material is solidified, the cast-in-place material and the prefabricated member are combined into a similar plate body structure to form the base layer of the rigid-flexible composite pavement.
Based on the preferred embodiment of this application, make temperature stress reduce stress through the strain of coating in a concrete plate and seam parcel scope through the polymer coating material, avoid the continuous accumulation of temperature stress finally to make the basic unit produce the fracture, the coating also can prevent the water damage simultaneously, improves basic unit weatherability and life. In addition, the dowel bar type mortise and tenon structure provided by the application can change the mode that the joint is purely dependent on the shear stress of the reinforcing steel bar, so that the concrete stress mode at the joint is combined with compression resistance and bending resistance, the load transfer capacity of the joint and the structural stability are improved, and the capacity of preventing the base layer reflection cracks is improved. And the force transmission rod type mortise and tenon is adopted to eliminate steel used for a road structure, so that the energy conservation and the environmental protection are facilitated.
It should be noted that when paving in the road groove, the three-dimensional embedding and extruding structure rule needs to be observed. Taking a prefabricated joint body 1 as an example, the joint body 1 is paved in a road groove according to a grid net type structure consisting of a plurality of longitudinal rows and transverse rows, the joint body 1 is a mesh separator, the mesh distance is the length of a single joint body 1, and for this, reference can be made to fig. 6 to 8, and fig. 6 is a schematic diagram of assembling the joint body of the rigid-flexible composite road surface according to an embodiment of the present application according to an X shape; FIG. 7 is a schematic view of a joint body of a rigid-flexible composite pavement according to an embodiment of the present application laid in a grid-type structure; fig. 8 is a schematic view of a base layer assembled by joint bodies of a rigid-flexible composite pavement according to an embodiment of the present application.
According to fig. 6-8, in actual construction, the joint body 1 can be transported to the site, the inclined joint body 1 is first placed in the road groove, and the adjacent joint bodies 1 are overlapped by the overlapping lugs 11. The overlapping ears 11 can be seen in fig. 1-4 and are arranged at the corners of the seam bodies 1 for overlapping between adjacent seam bodies 1.
With continued reference to fig. 6, in each column or row, the seam body 1 may be laid in an axial manner with its length extending and placed around the axis in an alternating left and right oblique manner to the seam body 1, so that it is in an X-like pattern in longitudinal and transverse axial views. A plurality of seam bodies 1 are laid to form a square grid as shown in fig. 7 and 8. Any vertical and horizontal intersection in the square grid is formed by butting four seam bodies 1. Preferably, in fig. 6, each joint body 1 may be oriented with the same inclination angle as the blades of a windmill. In fig. 7, four adjacent joint bodies 1 can form a base layer mesh, which can be used as a formwork for a cast-in-place concrete slab 2. That is, after the concrete is poured into the meshes, the base concrete slab 2 can be formed.
Wherein, the concrete plate 2 can form a mortise of the joint body 1 and the mortise of the joint head 12. As shown in fig. 1 to 4, the overall joint body 1 may be a dumbbell-shaped thin plate made of precast concrete, and the mortise heads 12 are disposed on both sides of the thin plate and have a trapezoid shape.
Next, with continued reference to fig. 6-8, the concrete panels 2 are constrained vertically and horizontally (X, Y, Z axes) by adjacent panels to form a three-dimensional extruded structure. Therefore, based on the application, no matter how the forming process of the concrete plate 2 and the joint body 1 is selected, the three-dimensional embedded and extruded structural characteristics can be kept after pavement. The joint body 1 has strong load transfer and stress dispersion capabilities, like a dowel bar and a dowel bar of a traditional concrete road base. As shown in fig. 8, a plurality of joint bodies 1 with weather-resistant coatings 3 can constitute a road base layer integral structure after a concrete slab 2 is cast in place. That is, the joint body 1 of this application and concrete plate 2 constitute the basic unit on hard and soft combined type road surface jointly, and this basic unit is different from prior art, need not set up the shrinkage joint, rise seam, construction joint, also need not set up the dowel steel bar.
Compared with the prior art, the embodiment of the application can bring the following technical effects:
the joint body 1 and the polymer coating 3 on the side surface replace a steel bar dowel bar at the joint of a concrete pavement and a structure for coating asphalt, and the temperature stress is reduced by strain. In addition, the joint body 1 is paved longitudinally and transversely to form a frame with a square grid-shaped structure, and paving rules of X-shaped cross arrangement are followed longitudinally and transversely, the side surfaces of each joint body 1 are inclined surfaces, the four side surfaces of the concrete plate 2 and the side surfaces of the joint body are complementary sets and are also inclined surfaces, and a three-dimensional embedding and extruding structural plate body is formed after paving, so that a dowel bar steel bar can be omitted, and the stress form of the joint part can be converted from steel bar shearing resistance to concrete inclined surface compression.
In addition, this application is through plate slope side, mortise and tenon formula joint body and composite coating's innovation, from macroscopic size, sub-size to micro-size from three different dimensions transmission load and dispersed temperature stress, constitutes road base overall structure jointly for expansion joint, construction joint can be cancelled to the base, make the road surface crack reduce moreover, and road comfort is better.
In addition, the joint body is small in size and light in weight, so that the transportation capacity is improved more easily than that of a precast concrete plate, the installation is more convenient, the prefabrication and pavement cost is lower, the intelligent pavement is more suitable, and a new process idea is provided for the assembly type operation of the rigid-flexible composite pavement base layer.
In addition, the concrete slabs and the joint body of the rigid-flexible composite pavement base layer can be made in a mode of interchangeable, namely when one of the concrete slabs and the joint body is made by prefabrication molding, the other concrete slab and the joint body are made by cast-in-place molding, and the same base layer structure with three-dimensional embedding and extrusion and flexible interfaces among the slabs can be obtained, which is one of the outstanding substantive features of the application.
The joint body 1 of the present application will be described in detail with emphasis on the overall structure of the composite pavement being clarified.
According to a preferred embodiment of this application, the joint body on combined type road surface that this application provided, the joint body constitutes the basic unit on combined type road surface with the concrete plate, the both sides of the joint body are provided with the fourth of twelve earthly branches of symmetry, one side of concrete plate is provided with the tongue-and-groove that corresponds with joint body fourth of twelve earthly branches, fourth of twelve earthly branches head and tongue-and-groove constitute the activity extending structure of concrete plate seam crossing, activity extending structure for example is the dowel bar structure that similar concrete plate seam crossing used, and the fourth of twelve earthly branches head replaces original dowel bar reinforcing bar, and the tongue-and-groove is then as holding fourth of twelve earthly branches head (dowel bar) and providing the space that makes it flexible.
The connector comprises a joint body, wherein the joint body is provided with a plurality of mortise heads symmetrically arranged on two sides of the joint body, and the mortise heads are connected with the joint body through bolts. The joint body and the concrete plate can be connected into a whole in a longitudinal and transverse bidirectional socket mode, and the mortise and tenon of the joint body with the coating can be regarded as a dowel bar with micro strain.
Preferably, the whole body of the seam body is a dumbbell-shaped sheet, the left side and the right side of the section of the sheet are both provided with trapezoidal mortise heads, and the midpoint connecting line of the short sides of the trapezoidal mortise heads on the left side and the right side is parallel to the upper edge and the lower edge of the seam body.
Preferably, each side of the joint body is provided with a single or a plurality of mortise heads.
One of the joint body or the concrete plate can adopt a prefabricated inorganic binder, and the other one adopts a cast-in-situ formed inorganic binder. For example, when a concrete plate adopts a cast-in-place process, a cast-in-place mortise is formed by taking the prefabricated part joint body as a template so as to be matched with the mortise head of the prefabricated part joint body; when the joint body adopts a cast-in-place process, the precast concrete plate is used as a template to form a cast-in-place mortise head which is matched with the mortise of the precast concrete plate. It should be noted that, no matter whether precast concrete plate or precast joint body, the mortise head only as an organic whole with the joint body, the mortise only as an organic whole with the concrete plate to better realize the technical effect of this application.
The side surface of the joint body or the concrete slab adopting the prefabricated inorganic binding material is coated with a polymer coating with deformation characteristics, the coating has certain deformation capacity, on one hand, the interface of the joint body and the concrete slab has certain flexibility, the stress concentration phenomenon is weakened, on the other hand, when the base layer is subjected to temperature shrinkage (or temperature expansion), the polymer material can be expanded or compressed, the stress is weakened through strain, and the mortise and tenon and the coating are matched to have the functions of transmitting load born by a dowel and improving shearing resistance and strain. The polymer coating can be made of various materials, such as one or more of single-component water-soluble polyurethane, easily-dispersible fiber and rubber powder. The coating can be a single layer, or can be divided into multiple layers for spraying according to the material properties and effects to form a multi-layer composite coating. The polymer composite material has high toughness, good low-temperature elongation, high bonding strength and good waterproofness.
Compared with the prior art, the embodiment of the application can bring the following technical effects:
two side symmetries about this application joint body are provided with fourth of twelve earthly branches head, and with the tongue-and-groove cooperation that concrete slab set up, replace traditional reinforcing bar dowel steel, change the fixed gliding structure of the other end of original reinforcing bar dowel steel one end and slide for both ends, further reduce the sliding quantity (the tensile volume of polymer coating) of dowel steel, make the temperature shrink decentralization. Moreover, the mortise and tenon of the joint body increases the shearing resistance of the inclined surface and is cooperated with the inclined surface to transmit load. In addition, the prefabricated member (joint body or concrete plate) is coated with a composite coating layer which is made of high polymer material and has large strain and weather resistance, so that the composite coating layer has good adhesion and proper deformation capacity with the concrete slab and the joint body, the temperature stress between the concrete slabs can be relieved by utilizing the energy absorption effect of the coating layer, the generation of cracks is prevented, and the coating layer also has the waterproof characteristic and can prevent the corrosion of pavement water to the seam of the base layer. In addition, when the seam body is formed by a cast-in-place forming process, the material has the characteristics of self-leveling, early strength, freezing prevention, durability and the like.
Referring to fig. 1-4, fig. 1 is a perspective view of a joint body of a rigid-flexible composite pavement according to an embodiment of the present application; FIG. 2 is a top view of a joint body of a rigid-flexible composite pavement according to one embodiment of the present application; FIG. 3 is a front view of a joint body of a rigid-flexible composite pavement according to one embodiment of the present application; FIG. 4 is a seamed body-side view of a rigid-flexible composite pavement according to one embodiment of the present application; fig. 5 is a schematic view of a polymer coated joint body for a rigid-flexible composite pavement according to an embodiment of the present application.
As shown in fig. 1-4, the joint body 1 of the composite pavement of the present application is preferably a dumbbell-shaped sheet of precast concrete on the whole, two side surfaces of the sheet are provided with symmetrical mortise heads 12, the shape of the mortise head 12 is preferably trapezoid, and a connecting line of the middle points of the short sides of the trapezoid mortise head 12 is parallel to the upper and lower edges of the joint body 1. Furthermore, the joint body 1 may be provided with symmetrically arranged engaging lugs 11 for engaging the adjacent joint body 1. When the joint body 1 is standing on the ground, it may form a predetermined inclined angle with the ground, and thus, the joint body 1 may be a cut and inclined preform.
Next, referring to fig. 5, for the joint body 1 of the rigid-flexible composite pavement, the side surface thereof may be sprayed with a highly dispersed weather-resistant coating 3. The high-molecular weather-resistant coating 3 has flexibility and deformability. Through the combination of the cast-in-place concrete plate 2, the high polymer weather-resistant coating 3 and the joint body 1, a rigid-flexible-rigid integral base structure can be formed, and the concrete has the advantages of rigidity, flexibility, stress dispersion, deformation resistance, and avoidance of base reflection cracks and temperature shrinkage cracks. In practical application, according to climatic conditions, the selected coating material can be divided into a tensile type in a low-temperature environment and a compressive type in a high-temperature environment, and has good waterproofness, so that the coating material can keep good energy absorption and waterproof effects in a large temperature range. A concrete-cementing material-joint body-cementing material-concrete multilayer interface structure is formed on the cross section of the base layer, and when the separated concrete plates 2 generate temperature stress, the elastic cementing material layer generates slight strain, so that the temperature stress cannot be continuously transmitted and accumulated. I.e. temperature stress is confined within a small grid.
According to one embodiment of the present application, the top plan area of the concrete slab 2 of the present application is reduced to about 1.0 square meters, for example, fluctuating in the range of 0.8 to 1.2 square meters, by a factor of 14 to 22.5 times as compared to the top plan area of conventional slabs, to reduce the temperature-shrinkage stress. When the concrete slab block 2 in the mesh hole adopts the prefabricating process, the upper plane and the lower plane of the prefabricated block are both rectangular, the upper plane and the lower plane are mutually rotated by 90 degrees, the long edge of the upper plane of two side surfaces of the prefabricated block corresponds to the short edge of the lower plane, and the short edges of the upper plane of the other two side surfaces of the prefabricated block correspond to the long edge of the lower plane. The seam arrangement of the road section after the precast blocks are paved accords with the rule that X-shaped intersection is formed in the longitudinal direction and the transverse direction.
It should be noted that, although the reference numeral of the mortise corresponding to the mortise 12 of the joint body 1 in the concrete plate 2 is not given in the drawings, a person skilled in the art should know that any mortise capable of cooperating with the mortise 12 of the joint body 1 of the present application to achieve the technical effect of the present application can be applied to the present application, and a person skilled in the present application can clearly know the mortise structure cooperating with the mortise 12 of the present application according to the description and drawings of the present application, and therefore, the description is omitted here.
In addition, fig. 1 to 9 are only preferred embodiments of the present invention, and those skilled in the art can reasonably predict all equivalent alternatives or obvious modifications of the embodiments given in the specification, and all the equivalents and the obvious modifications of the embodiments can achieve the purpose of the present invention and are included in the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a joint body on combined type road surface, joint body and concrete plate constitute the basic unit on combined type road surface, its characterized in that, the both sides of joint body are provided with symmetrical fourth of twelve earthly branches head, one side of concrete plate is provided with the tongue-and-groove that corresponds with joint body fourth of twelve earthly branches head, fourth of twelve earthly branches head and tongue-and-groove constitute the activity extending structure of concrete plate joint department.
2. The seaming body of claim 1, wherein the whole body of the seaming body is a dumbbell-shaped sheet, the left and right sides of the section of the sheet are provided with trapezoidal rivets, and the midpoint connecting line of the short sides of the trapezoidal rivets on the left and right sides is parallel to the upper and lower edges of the seaming body.
3. The seaming body of claim 1, wherein each side of the seaming body is provided with a single or multiple mortise head.
4. A joint according to claim 1, wherein one of said joint or concrete slab is a prefabricated inorganic binder and the other is a cast-in-place inorganic binder.
5. A joint body according to claim 1, wherein the sides of the joint body or concrete panel using the prefabricated inorganic binder are coated with a polymeric coating having deformation properties.
6. A composite pavement, characterized in that the base layer of the composite pavement is composed of concrete slabs and the joint body according to any one of claims 1 to 5.
7. A composite pavement according to claim 6, wherein said joint bodies are formed of a preformed inorganic binder, a plurality of said joint bodies being laid in a grid-like structure in a plurality of longitudinal and transverse rows within the grooves of the composite pavement and being arranged in an X-shaped cross-over arrangement along the axial direction extending along the length of the joint bodies; the arbitrary vertical and horizontal intersection of each square grid is formed by butt joint of four seam bodies.
8. The composite pavement of claim 7, wherein each of the four abutting splice bodies is inclined at the same inclination angle as the windmill blade.
9. A composite pavement according to claim 7 or 8, wherein concrete slabs are cast in each grid mesh, each concrete slab being constrained by adjacent concrete slabs in vertical and horizontal directions to form a three-dimensional extruded structure.
10. A composite pavement according to claim 6, characterised in that the top plan area of said concrete slabs is approximately 1.0 square metres.
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