CN110777598A - Rigid-flexible composite pavement expansion joint staggered-platform lap joint structure and preparation method thereof - Google Patents
Rigid-flexible composite pavement expansion joint staggered-platform lap joint structure and preparation method thereof Download PDFInfo
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- CN110777598A CN110777598A CN201911071254.1A CN201911071254A CN110777598A CN 110777598 A CN110777598 A CN 110777598A CN 201911071254 A CN201911071254 A CN 201911071254A CN 110777598 A CN110777598 A CN 110777598A
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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
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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
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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
- E01C11/14—Dowel assembly ; Design or construction of reinforcements in the area of joints
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Abstract
A rigid-flexible composite pavement expansion joint staggered platform lap joint structure and a preparation method thereof relate to the technical field of pavements. The rigid-flexible composite pavement expansion joint staggered-platform lap joint structure comprises an asphalt layer and a concrete layer which are arranged up and down, wherein at least one staggered-platform lap joint layer arranged along the horizontal direction is arranged between the asphalt layer and the concrete layer; the slab staggering lapping layer comprises a plurality of force transmission rod assemblies, a first concrete layer and a second concrete layer which are sequentially arranged along the width direction of the concrete layers, a first slab staggering concrete layer, a bonding layer oil layer and a second slab staggering concrete layer which are sequentially arranged from bottom to top are arranged between the first concrete layer and the second concrete layer, and expansion joints are respectively arranged between the first concrete layer and the second slab staggering concrete layer and between the second concrete layer and the first slab staggering concrete layer. The application provides a road surface structure that hard and soft combined type road surface expansion joint staggered platform overlap joint structure and preparation method provided can reduce expansion joint quantity and size, prolongs the dowel bar life-span, improves road surface durability and increases driving comfort.
Description
Technical Field
The application relates to the technical field of pavements, in particular to a rigid-flexible composite pavement expansion joint staggered platform lap joint structure and a preparation method thereof.
Background
The existing concrete pavement design and construction have certain problems, which easily cause the expansion joint of the concrete pavement to be frequently damaged, for example: the parallelism is not enough when the expansion joint dowel bar is installed, the sleeve is neglected to be installed without reserving shrinkage allowance, the asphalt coating of the dowel bar is too thick, filling materials in the expansion joint are scattered, hard objects are embedded into the joint to cause expansion joint crushing, the outer positioning transverse plate is not always arranged according to the design requirement during construction operation, so that the central line of the dowel bar is not parallel to the plate surface and the central line of the pavement, the reservation of the expansion joint gap is unreasonable, caulking materials fall off, and the joint edge crushing caused by embedding the hard objects such as gravels into the caulking, and the like.
A great deal of observation shows that the root causes of the serious damage of the expansion joint are mainly the failure of the sliding dowel and the embedding of hard objects, but not the insufficient width of the expansion joint. The expansion joint width is regulated to be 2.0-2.5 cm by the specification, the joint is usually expanded to be 4.0-5.0 cm in actual construction, the problem of expansion joint is not solved, the force transmission of a plate caused by overlarge joint width is weakened, and the possibility of edge damage is increased.
At present, some researchers provide measures for improving the problems, mainly aiming at the problem of failure of the effective control dowel bar, so as to solve the problems of too complex sliding device and great technical difficulty in the existing expansion joint design method. The method is mainly characterized in that 2.0-2.5 cm gaps are reserved at two ends of the expansion joint according to the standard, dowel bar members in the original standard are eliminated, and concrete reinforcing bars on two sides of the expansion joint are used for reinforcing the strength of two ends of the expansion joint, so that the edge damage of the expansion joint is improved greatly, and the problem of weak stress of the edge of an expansion joint plate is solved. However, the method does not consider the integrity of the expansion joint plates, and because the dowel bar is not arranged, the expansion joint plates on the two sides of the expansion joint are isolated and are easy to form new diseases such as vehicle jumping, sinking and the like.
Disclosure of Invention
The application aims to provide a rigid-flexible composite pavement expansion joint staggered-platform lap joint structure and a preparation method thereof, which can reduce the quantity and size of expansion joints, prolong the service life of a dowel bar, improve the durability of a pavement and increase the travelling comfort.
The embodiment of the application is realized as follows:
in a first aspect, an embodiment of the present application provides a rigid-flexible composite pavement expansion joint slab staggering lapping structure, which includes an asphalt layer and a concrete layer that are arranged up and down, and at least one slab staggering lapping layer that is arranged along a horizontal direction is arranged between the asphalt layer and the concrete layer; the staggered platform overlapping layer comprises a plurality of force transmission rod assemblies, a first concrete layer and a second concrete layer which are sequentially arranged along the width direction of the concrete layers, a first staggered platform concrete layer, a bonding layer oil layer and a second staggered platform concrete layer which are sequentially arranged from bottom to top are arranged between the first concrete layer and the second concrete layer, and expansion joints are respectively arranged between the first concrete layer and the second staggered platform concrete layer and between the second concrete layer and the first staggered platform concrete layer; the dowel bar assembly comprises a dowel bar and at least one erection rib connected with the bottom of the dowel bar, one end of the dowel bar penetrates into the first concrete layer or the second concrete layer, and the other end of the dowel bar penetrates into the first slab staggering concrete layer or the second slab staggering concrete layer.
In some alternative embodiments, a seam expansion plate is arranged in the expansion seam.
In some alternative embodiments, a polyester fiberglass cloth is disposed between the top of the expansion joint and the asphalt layer.
In some optional embodiments, the dowel steel penetrates through one end surface of the first staggered concrete layer or the second staggered concrete layer and is sequentially covered with an asphalt layer and a polyethylene film layer from inside to outside.
In some optional embodiments, the frame ribs include a main rib shaped like a Chinese character 'men' and two support ribs respectively connected to two ends of the main rib, and the two support ribs are respectively perpendicular to the plane of the main rib.
In some alternative embodiments, the first concrete layer and the first concrete layer are connected as a single body, and the second concrete layer are connected as a single body.
In a second aspect, an embodiment of the present application further provides a method for preparing the staggered-step lap joint structure of the rigid-flexible composite pavement expansion joint, where the method includes the following steps:
paving a pavement base layer structure, and then arranging a plurality of force transmission rod assemblies at preset positions on the pavement base layer structure;
pouring a first concrete layer and a first slab staggering structure in the slab staggering lap joint structure by utilizing a template, then spraying adhesive layer oil on the surface of the first slab staggering concrete layer, and pouring by utilizing the template to obtain a second concrete layer and a second slab staggering concrete layer in the slab staggering lap joint structure;
and paving asphalt on the upper surface of the staggered platform lap joint structure.
In some optional embodiments, when the first concrete layer and the first staggered concrete layer are cured to reach 35-45% of the designed strength, the expansion joint plate is arranged at the preset expansion joint.
In some optional embodiments, the amount of the spread oil is 0.3 to 0.6L/m
2。
The beneficial effect of this application is: the staggered-platform lap joint structure for the expansion joint of the rigid-flexible composite pavement and the preparation method thereof provided by the embodiment have the advantages that: the design method of the staggered platform lap joint structure is adopted, the expansion deformation of a part of concrete can be absorbed by sliding of a staggered platform position interface, the expansion joint width can be reduced, the expansion joint quantity can be reduced, and the expansion joint damage quantity can be reduced. Secondly, by utilizing the characteristics of a rigid-flexible composite pavement, the lower surface layer adopts a concrete pavement as a bearing layer, the upper surface layer adopts an asphalt pavement as a function improvement layer, and the middle layer surface adopts a staggered platform position with a sliding interface, so that the durability of the pavement can be improved, and the travelling comfort is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a cross-sectional view of a staggered-joint lap joint structure of a rigid-flexible composite pavement expansion joint provided in an embodiment of the present application;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a schematic structural view of a frame stud in a staggered-joint lap joint structure of a rigid-flexible composite pavement expansion joint provided by the embodiment of the application.
In the figure: 100. a concrete layer; 200. a staggered lapping layer; 210. a first concrete layer; 220. a second concrete layer; 230. a first slab staggering concrete layer; 240. a viscous layer oil layer; 250. a second slab staggering concrete layer; 260. expanding the seam; 261. a seam expanding plate; 270. polyester glass fiber cloth; 300. an asphalt layer; 400. a force transfer rod assembly; 410. a dowel bar; 420. erecting ribs; 421. a main rib; 422. supporting ribs; 430. an asphalt layer; 440. a polyethylene film layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The characteristics and properties of the rigid-flexible composite pavement expansion joint staggered-platform lap joint structure and the preparation method thereof are further described in detail in the following with reference to the examples.
As shown in fig. 1, fig. 2 and fig. 3, an embodiment of the present application provides a rigid-flexible composite pavement expansion joint staggered-slab overlapping structure, which includes a concrete layer 100, a staggered-slab overlapping layer 200 and an asphalt layer 300, which are sequentially arranged from bottom to top; the staggered platform overlapping layer 200 comprises two groups of force transmission rod assemblies 400 and a first concrete layer 210 and a second concrete layer 220 which are sequentially arranged along the width direction of the concrete layer 100, a first staggered platform concrete layer 230, a sticky layer oil layer 240 and a second staggered platform concrete layer 250 which are sequentially arranged from bottom to top are arranged between the first concrete layer 210 and the second concrete layer 220, expansion joints 260 are respectively arranged between the first concrete layer 210 and the second staggered platform concrete layer 250 and between the second concrete layer 220 and the first staggered platform concrete layer 230, expansion joint plates 261 are arranged in the expansion joints 260, and polyester glass fiber cloth 270 is arranged between the tops of the expansion joints 260 and the asphalt layer 300; each group of force transmission rod assemblies 400 comprises 12 force transmission rod assemblies 400 arranged at intervals along the length direction of the concrete layer 100, each force transmission rod assembly 400 comprises a force transmission rod 410 and a standing rib 420 connected with the bottom of the force transmission rod 410, wherein two ends of one group of force transmission rods 410 respectively penetrate through the first concrete layer 210 and the second staggered concrete layer 250, two ends of the other group of force transmission rods 410 respectively penetrate through the second concrete layer 220 and the first staggered concrete layer 230, one group of force transmission rods 410 penetrate through one end of the first staggered concrete layer 230, and the other group of force transmission rods 410 penetrate through one end surface of the second staggered concrete layer 250 and are sequentially covered with an asphalt layer 430 and a polyethylene film layer 440 from inside to outside; the vertical ribs 420 include a main rib 421 shaped like a Chinese character 'men' and two support ribs 422 respectively connected to two ends of the main rib 421, and the two support ribs 422 are respectively perpendicular to the plane where the main rib 421 is located.
The embodiment of the application also provides a preparation method of the rigid-flexible composite pavement expansion joint staggered platform lap joint structure, which comprises the following steps:
paving 3 cement stabilized macadam base layers with the thickness of 18cm according to the construction technical specification requirements of the pavement base layer, and maintaining moisture and heat for 7 days to ensure that the cement stabilized macadam base layers reach the strength required by the design, thereby obtaining a concrete layer 100;
after the concrete layer 100 reaches the design strength, measuring and lofting to determine the position of the expansion joint 260, marking, selecting a steel mould with the thickness of 24cm to be arranged on the concrete layer 100, and supporting the steel mould by using a fixed support;
after the steel die is installed, 24 dowel steel assemblies 400 are embedded at the position where the expansion joint 260 is determined, wherein the length of each dowel steel 410 is 80cm, and the dowel steel is adopted
The smooth round steel bar, the interval of two sets of dowel bar subassemblies 400 is 30cm, and the main muscle 421 length of setting up muscle 420 is 10cm, and the height of main muscle 421 in two sets of dowel bar subassemblies 400 is 15cm and 6cm respectively, and the length of brace rod 422 is 8cm, uses polyethylene film parcel after the one end of dowel bar 410 is paintd pitch.
Waiting that power rod subassembly 400 is pre-buried after accomplishing, pour in the steel mould and obtain first concrete layer 210 and the first wrong platform concrete layer 230 in wrong platform overlap joint layer 200, the width of first wrong platform concrete layer 230 is 1.5m, pours the in-process and pays attention to power rod 410 position and will satisfy the requirement, pours in-process in time vibrate, smear surface, receipts light, pours in time watering, cover the health preserving after accomplishing.
After the first concrete layer 210 and the first slab staggering concrete layer 230 are subjected to heat preservation and moisture preservation maintenance for at least 3 days, when the strength of the first concrete layer 210 and the first slab staggering concrete layer 230 reaches 40% of the designed strength, placing a crack expansion plate 261 at the position of the crack expansion 260, wherein the crack expansion plate 261 is made of asphalt fiber plates, the thickness of the crack expansion plate is 1.0cm, and then spraying adhesive layer oil on the surface of the first slab staggering concrete layer 230, wherein the spraying amount is 0.6L/m
2。
16h after the viscous layer oil is sprayed, pouring by utilizing a steel die to obtain a second concrete layer 220 and a second slab staggering concrete layer 250 in the slab staggering lapping layer 200, paying attention to the position of the dowel bar 410 in the pouring process to meet the requirement, vibrating, plastering and finishing in time in the pouring process, and sprinkling and covering for health preservation in time after the pouring is finished.
After the first concrete layer 210, the second concrete layer 220, the first slab staggering concrete layer 230 and the second slab staggering concrete layer 250 are maintained to reach 100% of the designed strength, the top of the expansion joint 260 is filled with a filler which is made of a modified asphalt material, then polyester glass fiber cloth is attached to the top of the expansion joint 260, the polyester glass fiber cloth extends outwards by 50cm along two sides of the expansion joint 260, and the polyester glass fiber cloth meets the requirements of technical Specification for application of highway geosynthetics (JTG/T D32-2012).
After the polyester glass fiber cloth is pasted, paving a layer of 8 cm-thick AC-25C type coarse-grained asphalt concrete, wherein the paving needs to meet the requirements of technical Specification construction for road asphalt pavement (JTG F40-2004); then spraying the viscous layer oil, wherein the dosage range of the viscous layer oil is 0.5L/m
2And after the viscous layer oil is demulsified, paving a second layer of SMA-13 asphalt horseshoe grease macadam with the thickness of 4cm, wherein the paving meets the requirements of technical Specification construction for road asphalt pavement (JTG F40-2004), and the traffic can be opened when the asphalt temperature is reduced to 50 ℃.
The staggered overlapping layer 200 capable of generating relative sliding is arranged between the concrete layer 100 at the bottom and the asphalt layer 300 at the top, the staggered overlapping layer 200 can play an interface sliding role, a buffer role is played between the concrete pavement concrete layer 100 serving as a bearing layer and the asphalt layer 300 serving as an improvement layer, the durability of the pavement can be effectively improved, and the travelling comfort can be increased, the staggered overlapping layer 200 comprises a first staggered concrete layer 210 and a second concrete layer 220 which are positioned at two sides, and a first staggered concrete layer 230, a viscous oil layer 240 and a second staggered concrete layer 250 which are sequentially arranged between the first concrete layer 210 and the second concrete layer 220 from bottom to top, when the pavement temperature rises, expands or shrinks downwards, the viscous oil layer 240 can enable the first staggered concrete layer 230 and the second staggered concrete layer 250 to generate relative sliding, thereby cushion the deformation that partial expansion and shrink caused, guarantee to reduce the probability that the expansion joint disease produced in the prerequisite that reduces the expansion joint size and reduce expansion joint quantity, bury the both ends of dowel steel 410 in the dowel steel subassembly 400 in first concrete layer 210 and second slab staggering concrete layer 250 and second concrete layer 220 and first slab staggering concrete layer 230 respectively simultaneously, can utilize dowel steel subassembly 400 to form a whole with the organic combination of each part of slab staggering overlap joint layer 200, further structural stability when improving slab staggering overlap joint layer 200 atress, guarantee slab staggering overlap joint layer 200's overall structure performance, the effectual possibility that reduces the expansion joint disease and produce, increase of service life.
In some alternative embodiments, the first concrete layer 210 and the first staggered concrete layer 230 are connected as a single body, and the second concrete layer 220 and the second staggered concrete layer 250 are connected as a single body. In some alternative embodiments, two, three, four or more staggered overlapping layers 200 arranged along the width direction of the concrete layer 100 may be further disposed between the concrete layer 100 and the asphalt layer 300.
The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.
Claims (9)
1. A rigid-flexible composite pavement expansion joint staggered-platform lap joint structure is characterized by comprising an asphalt layer and a concrete layer which are arranged up and down, wherein at least one staggered-platform lap joint layer arranged along the horizontal direction is arranged between the asphalt layer and the concrete layer; the slab staggering lapping layer comprises a plurality of force transmission rod assemblies, a first concrete layer and a second concrete layer which are sequentially arranged along the width direction of the concrete layers, a first slab staggering concrete layer, a bonding layer oil layer and a second slab staggering concrete layer which are sequentially arranged from bottom to top are arranged between the first concrete layer and the second concrete layer, and expansion joints are respectively arranged between the first concrete layer and the second slab staggering concrete layer and between the second concrete layer and the first slab staggering concrete layer; the dowel bar assembly comprises a dowel bar and at least one erection rib connected with the bottom of the dowel bar, one end of the dowel bar penetrates through the first concrete layer or the second concrete layer, and the other end of the dowel bar penetrates through the first slab staggering concrete layer or the second slab staggering concrete layer.
2. The slab staggering lapping structure for the rigid-flexible composite pavement according to claim 1, wherein a slab staggering plate is arranged in the expansion joint.
3. The rigid-flexible composite pavement expansion joint staggered-platform lap joint structure according to claim 1, wherein polyester fiberglass cloth is arranged between the top of the expansion joint and the asphalt layer.
4. The rigid-flexible composite pavement expansion joint staggered platform overlapping structure according to claim 1, wherein the dowel penetrates through one end surface of the first staggered platform concrete layer or the second staggered platform concrete layer and is sequentially covered with an asphalt layer and a polyethylene film layer from inside to outside.
5. The rigid-flexible composite pavement expansion joint staggered-platform lap joint structure according to claim 1, wherein the erection ribs comprise door-shaped main ribs and support ribs connected with two ends of the main ribs respectively, and the two support ribs are perpendicular to the plane of the main ribs respectively.
6. The rigid-flexible composite pavement expansion joint staggered overlapping structure according to claim 1, wherein the first concrete layer and the first staggered concrete layer are connected into a whole, and the second concrete layer and the second staggered concrete layer are connected into a whole.
7. The method for preparing the staggered-platform lap joint structure for the rigid-flexible composite pavement according to claim 1, wherein the method comprises the following steps:
paving a pavement base structure, and then arranging a plurality of force transmission rod assemblies at preset positions on the pavement base structure;
pouring on the pavement base layer structure by using a template to obtain the first concrete layer and the first slab staggering structure in the slab staggering overlapping structure, then spraying adhesive layer oil on the surface of the first slab staggering structure, and pouring by using the template to obtain the second concrete layer and the second slab staggering structure in the slab staggering overlapping structure;
and paving asphalt on the upper surface of the staggered platform lap joint structure.
8. The method for preparing the rigid-flexible composite pavement expansion joint staggered-platform lap joint structure according to claim 7, wherein when the first concrete layer and the first staggered-platform concrete layer are cured to reach 35-45% of the designed strength, an expansion joint plate is arranged at the preset expansion joint.
9. The method for preparing the staggered-joint lap joint structure of the rigid-flexible composite pavement according to claim 7, wherein the spraying amount of the adhesive layer oil is 0.3-0.6L/m
2。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911071254.1A CN110777598A (en) | 2019-11-05 | 2019-11-05 | Rigid-flexible composite pavement expansion joint staggered-platform lap joint structure and preparation method thereof |
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| CN201911071254.1A CN110777598A (en) | 2019-11-05 | 2019-11-05 | Rigid-flexible composite pavement expansion joint staggered-platform lap joint structure and preparation method thereof |
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| CN112832083A (en) * | 2020-12-31 | 2021-05-25 | 山东省公路桥梁建设有限公司 | Winter road construction method |
| CN115491945A (en) * | 2022-05-30 | 2022-12-20 | 安徽省交通规划设计研究总院股份有限公司 | Treatment method for reflection cracks of white-to-black road surface |
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| CN115491945B (en) * | 2022-05-30 | 2023-11-24 | 安徽省交通规划设计研究总院股份有限公司 | Treatment method for reflection crack of white-to-black pavement |
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Application publication date: 20200211 |