A deformation joint expansion device, pavement structure and construction method thereof

Abstract

The present invention relates to the technical field of telescopic devices, and in particular to a deformation joint telescopic device, a pavement structure and a construction method thereof, wherein the device is installed in a notch above the deformation joint, and the device comprises: a displacement support plate, which is arranged above the deformation joint, and the displacement support plate is fixedly arranged on one of the two sides of the deformation joint; an elastic support assembly, which comprises a fixing seat fixed on both sides of the displacement support plate and a rigid telescopic member connected to the two fixing seats, the rigid telescopic member being fixed in the air above the deformation joint, and having elasticity along the connecting line direction of the two fixing seats; an elastomer, which is filled in the notch above the deformation joint and immerses the elastic support assembly; wherein both sides of the elastomer are connected to the side walls of the notch above the deformation joint, and when the deformation joint is telescopically deformed, the elastic support assembly provides a deformation buffering force. The present invention strengthens the overall structural strength of the deformation telescopic device by introducing a steel member into the elastomer, which is beneficial to improving the integrity of the pavement and driving comfort.

Description

Technical Field

[0001] The present invention relates to the technical field of expansion and contraction devices, and in particular to a deformation joint expansion and contraction device, a pavement structure and a construction method thereof. Background Art

[0002] As an important part of the main structure of the road, the pavement directly bears the vehicle load and must ensure good bearing capacity, integrity, deformation resistance and durability. At present, the typical diseases of pavement are focused on the reflective cracks at the deformation joints. Therefore, how to design the expansion device at the reflective cracks has become a problem that needs to be solved urgently.

[0003] In the prior art, for example, the Chinese utility model patent with the publication number CN211312061U, published on August 21, 2020, entitled "A pavement expansion joint structure and a tool for repairing pavement expansion joints", reduces the occurrence of reflective cracks by pouring a sealant into the expansion joint and laying a modified hot asphalt layer, a polyester fiber cloth layer and an asphalt mixture above the expansion joint;

[0004] When implementing the above solution, the inventors found that although the above filling material alleviated the problem of cracks in the pavement structure to a certain extent, the overall deformation resistance of the above filling material was still insufficient on roads with heavy traffic and heavy load. Summary of the invention

[0005] In view of at least one of the above technical problems, the present invention provides a deformation joint expansion and contraction device, a pavement structure and a construction method thereof, and adopts structural improvement of the expansion and contraction device to increase the overall service life of the deformation joint.

[0006] According to a first aspect of the present invention, a deformation joint expansion device is provided, the device is installed in a notch above the deformation joint, and the device comprises:

[0007] A displacement support plate, wherein the displacement support plate is arranged above the deformation joint, and the displacement support plate is fixedly arranged on one of the two sides of the deformation joint;

[0008] The elastic support assembly includes a fixing seat fixed on both sides of the displacement support plate and a rigid telescopic member connected to the two fixing seats, wherein the rigid telescopic member is suspended and fixed above the deformation joint and has elasticity along the connecting line direction of the two fixing seats;

[0009] An elastic body is filled in the notch above the deformation joint and immerses the elastic support assembly;

[0010] Wherein, the two sides of the elastic body are connected to the side walls of the notch above the deformation joint, and when the deformation joint is expanded and contracted, the elastic support component provides deformation buffering force.

[0011] In some embodiments, both sides of the elastomer are coated with sealant.

[0012] In some embodiments, the outer side of the sealant is coated with an epoxy resin interface agent.

[0013] In some embodiments, the displacement support plate is a steel plate, and a rubber isolation layer is laid on the displacement support plate, and the elastomer can be relatively slidably arranged on the displacement support plate along with the rubber isolation layer.

[0014] In some embodiments, the rigid telescopic member is arranged in a linear shape, and includes an internal sliding rod, a sliding sleeve sleeved on the internal sliding rod, and a first spring sleeved between the internal sliding rod and the sliding sleeve.

[0015] In some embodiments, the rigid telescopic member further includes a second spring sleeved outside the sliding sleeve.

[0016] In some embodiments, the rigid telescopic member is arranged in an arch shape, including an arch tube, the arch tube includes an arch segment and straight segments at both ends, and the rigid telescopic member also includes an inner rod sleeved on the two straight segments and a third spring sleeved between the inner rod and the arch tube.

[0017] In some embodiments, a fourth spring is further sleeved on the outside of the arched tube.

[0018] In some embodiments, the elastomer is a high-elastic asphalt mixture.

[0019] In some embodiments, the high elastic asphalt mixture is composed of polymer modified asphalt and single particle size basalt aggregate, and the mass ratio thereof is (30-40):100;

[0020] The polymer modified asphalt comprises the following components: 100 parts of base asphalt, 15-25 parts of nano rubber powder of 80-250 nm, 10-15 parts of rubber particles of 0.5-1 cm, 2-5 parts of activator, 1-2.5 parts of epoxy adhesive, 0.5-1.2 parts of polyvinyl alcohol fiber, and 6-10 parts of composite synergist;

[0021] The single-size basalt aggregate has a particle size of 5-10 mm, 10-15 mm, or 15-20 mm.

[0022] According to a second aspect of the present invention, there is also provided a pavement structure, comprising: a structural base plate, a base layer, a lower layer and a surface layer, wherein:

[0023] The base layer is laid on the structural bottom plate, and the base layer and the structural bottom plate have a deformation joint separating the two in the vertical direction;

[0024] The lower layer is laid on the base layer, and a notch is provided in the base layer above the deformation joint, and the deformation joint expansion and contraction device described in any one of the first aspects is fixed in the notch;

[0025] The surface layer is laid on the underlying layer.

[0026] In some embodiments, the deformation joint is further filled with a caulking strip, and the caulking strip is a foam strip.

[0027] According to a third aspect of the present invention, there is also provided a construction method of the pavement structure as described in the second aspect, comprising the following steps:

[0028] Pour a base layer of set thickness on the structural bottom plate, leave a deformation joint corresponding to the structural bottom plate, and wait for the base layer to reach the designed strength;

[0029] Casting the lower layer on the base layer, and after the lower layer reaches the designed strength, opening a notch in the lower layer, wherein the notch is opened above the deformation joint, and when the notch is opened, the bottom is exposed from the surface of the base layer;

[0030] Place the displacement support plate above the deformation joint and fix it on one side;

[0031] Fixing an elastic support component in the notch across the deformation joint, wherein at least two elastic components are arranged in parallel and spaced apart along the width direction of the road surface;

[0032] Casting an elastic body in the slot, and the elastic body fills the space in the slot;

[0033] After the elastomer reaches the designed strength, the surface layer is laid on top of the underlying layer.

[0034] The beneficial effects of the present invention are as follows: the present invention improves the overall support strength of the elastomer compared with the prior art by arranging a single-sided fixed displacement support plate above the deformation joint, and by burying an elastic support component in the elastomer, and by arranging a rigid telescopic part in the elastic support component, and provides a buffering force through the rigid telescopic part when the elastomer is deformed, thereby increasing the overall service life of the elastomer. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1It is a schematic diagram of the structure of the expansion joint expansion device in an embodiment of the present invention;

[0037] Figure 2 This is a schematic structural diagram of an elastic support member in an embodiment of the present invention;

[0038] Figure 3 It is a schematic structural diagram of another elastic support member in an embodiment of the present invention;

[0039] Figure 4 A schematic cross-sectional view of a pavement structure according to an embodiment of the present invention;

[0040] Figure 5 The present invention is a flow chart of the steps of the pavement structure construction method in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0044] like Figure 1 to Figure 2 The expansion joint expansion device shown in the figure is installed in the slot above the expansion joint, and the device includes a displacement support plate 10, an elastic support assembly 20 and an elastic body 30, wherein:

[0045] like Figure 1 As shown in , the displacement support plate 10 is arranged above the deformation joint, and the displacement support plate 10 is fixedly arranged on one side of the two sides of the deformation joint; it should be pointed out here that in some embodiments of the present invention, the material of the displacement support plate 10 has various forms, such as steel plate or stainless steel alloy plate; there are various ways to fix the displacement support plate 10, in some embodiments, such as Figure 1As shown in , expansion screws are used for fixing. Here, one side refers to Figure 1 The left or right side of the deformation joint shown in the figure is fixed, while the other end is not constrained; through this arrangement, when the deformation joint shrinks or expands due to temperature or other reasons, the deformation joint gap is retained due to the coverage of the displacement support plate 10, and its regulating function continues to be exerted.

[0046] Please continue to refer to Figure 1 The elastic support assembly 20 includes a fixing seat 21 fixed on both sides of the displacement support plate 10 and a rigid telescopic member 22 connected to the two fixing seats 21. The rigid telescopic member is suspended and fixed above the deformation joint and has elasticity along the connecting line direction of the two fixing seats 21; the elastic body 30 is filled in the notch above the deformation joint and immerses the elastic support assembly 20; it should be pointed out here that in the embodiment of the present invention, the elastomer 30 is a high-elastic asphalt mixture, which specifically has a variety of mixing ratios, some of which will be introduced in the following of the present invention; by setting the high-elastic asphalt mixture, the deformation of the deformation joint can be adapted, and the elastomer 30 is stretched when the expansion joint becomes larger and compressed when the expansion joint becomes smaller, and no obvious deformation occurs in the height direction, that is, no concave when stretched and convex when compressed; in the embodiment of the present invention, by setting the elastomer 30, the deformation amount requirement of ±3.5cm in the horizontal direction can be adapted;

[0047] It should also be noted that in some embodiments of the present invention, Figure 1 As shown in the figure, the fixing seat 21 can be an angle steel, which is fixed by expansion screws; it can be understood that in other embodiments of the present invention, the fixing seat 21 also has a variety of structural forms and fixing forms, such as fixing by direct pre-embedding or fixing by horizontal plugging; technicians in this field can choose according to actual needs; the specific structure of the rigid telescopic member 22 can be as follows Figure 2 As shown in the figure, the connecting rod connected by the spring may also be a structure with certain rigidity and deformable recovery, such as a spring, a cylinder, etc.; by introducing the structure of the elastic support member into the elastic body 30, the anti-deformation performance of the elastic body 30 is improved;

[0048] Specifically, in some embodiments of the present invention, both sides of the elastic body 30 are connected to the side walls of the notch above the deformation joint, and when the deformation joint is stretched and deformed, the elastic support assembly 20 provides deformation buffering force. The buffering force here refers to the reverse force provided by the elastic support assembly 20 when the elastic body 30 is deformed. For example, when the elastic body 30 is stretched due to the enlargement of the deformation joint, the elastic body 30 provides an inward pulling force, thereby preventing the elastic body 30 from deforming too much, and vice versa; in this way, by introducing the structural form of the elastic support member into the elastic body 30, the anti-deformation performance of the elastic body 30 in the horizontal and vertical directions is improved, thereby improving the overall reliability of use.

[0049] In the above embodiment, by providing a single-sided fixed displacement support plate 10 above the deformation joint, and by burying the elastic support assembly 20 in the elastomer 30, the overall support strength of the elastomer 30 is improved compared with the prior art by providing the rigid telescopic member 22 in the elastic support assembly 20, and when the elastomer 30 is deformed, a buffering force is provided by the rigid telescopic member 22, thereby improving the overall service life of the elastomer 30.

[0050] Based on the above examples, please continue to refer to Figure 1 In the embodiment of the present invention, sealant 31 is coated on both sides of the elastic body 30. The function of the sealant 31 is to improve the waterproof performance of the telescopic device. By setting the sealant 31, the intrusion of water is prevented, and the durability of the product is improved.

[0051] Please continue to refer to Figure 1 , the outer side of the sealant 31 is coated with an epoxy resin interface agent 32. It should be pointed out here that in the embodiment of the present invention, the epoxy resin interface agent 32 is used to connect the elastomer 30 with the two side walls of the notch; it can be understood that bonding through the interface agent is only one implementation method in the embodiment of the present invention, and other structural forms will be introduced below.

[0052] In the embodiment of the present invention, the displacement support plate 10 is a steel plate. Specifically, the width of the steel plate is not less than 25% of the width of the slot, and the thickness of the steel plate is set at 4-6 mm. Since one side of the displacement support plate 10 is fixed, when the deformation joint is deformed, the displacement steel plate will have a certain relative displacement relative to the elastic body 30. In order to reduce the damage to the elastic body 30 caused by the relative displacement between the elastic body 30 and the steel plate, in the embodiment of the present invention, please continue to refer to Figure 1, a rubber isolation layer is laid on the displacement support plate 10, and the elastomer 30 can be relatively slidably arranged on the displacement support plate 10 along with the rubber isolation layer. When laying, the rubber isolation layer is directly laid on the steel plate, and the elastomer 30 can move on the steel plate along with the rubber isolation layer when being stretched or compressed, reducing the constraints it is subjected to, which is equivalent to laying a protective layer for the elastomer 30, reducing the friction and constraints between the steel plate and the elastomer 30, and reducing the damage to the elastomer 30. In one embodiment of the present invention, the rubber isolation layer is made of EPDM rubber, with a thickness of 2mm, and both sides are 20mm longer than the displacement support plate 10.

[0053] Regarding the specific structural form of the rigid telescopic member 22, as shown in FIG. Figure 1 As shown in , in some embodiments of the present invention, the rigid telescopic member 22 is arranged in a straight line, including an internal slide bar 22a, a sleeve 22b sleeved on the internal slide bar 22a, and a first spring 22c sleeved between the internal slide bar 22a and the sleeve 22b. It should be pointed out here that in some embodiments of the present invention, the length of the internal slide bar 22a is less than the length of the sleeve 22b, and the length of the first spring 22c is greater than the length of the internal slide bar 22a, so that when the internal slide bar 22a moves toward the inside of the sleeve 22b, the first spring 22c is compressed to generate a reverse elastic force; in this form, a constraint is provided in the horizontal direction;

[0054] On the other hand, in the embodiment of the present invention, please continue to refer to Figure 2 The rigid telescopic member 22 further includes a second spring 22d sleeved on the outside of the sliding sleeve 22b. Since the second spring 22d is sleeved on the sliding sleeve 22b, the remaining part of the second spring 22d is bonded and solidified with the elastic body 30 when the elastic body 30 is cast. In this way, the second spring 22d also limits the deformation of the elastic body 30 in the vertical direction. When the elastic body 30 is stretched or compressed, the second spring 22d and the sliding sleeve 22b prevent it from being arched or concave.

[0055] In addition, it should be pointed out that in the embodiment of the present invention, there is no limitation on the number of elastic support members, and those skilled in the art may select the number according to actual working conditions.

[0056] In other embodiments of the present invention, the structural form of the rigid telescopic member 22 is modified, such as Figure 3As shown in the figure, the rigid telescopic member 22 is arranged in an arch shape, including an arch tube 22e, the arch tube 22e includes an arch segment 22e1 and straight segments 22e2 at both ends, and the rigid telescopic member 22 also includes an inner rod 22f sleeved between the two straight segments 22e2, and a third spring 22g sleeved between the inner rod 22f and the arch tube 22e. By setting the rigid telescopic member 22 in an arched structure, it can play a supporting role in the vertical direction, preventing the rigid telescopic member 22 from being dented when subjected to a large load, thereby affecting its telescopic performance; Figure 3 As shown in , in some embodiments of the present invention, the straight segments 22e2 at both ends are arranged obliquely. Of course, in other embodiments of the present invention, the straight segments 22e2 can also be arranged in a horizontal manner. In the embodiments of the present invention, the arched structure is used to achieve a higher strength support, thereby improving the reliability of the rigid telescopic member 22. Similarly, in some embodiments of the present invention, a fourth spring 22h is also sleeved on the outside of the arched tube 22e. The function of the fourth spring 22h is the same as that of the second spring 22d, and will not be repeated here.

[0057] In some embodiments of the present invention, the elastomer 30 is made of high-elastic asphalt mixture. Specifically, the high-elastic asphalt mixture is composed of polymer-modified asphalt and single-size basalt aggregate, and the mass ratio is (30-40):100. Those skilled in the art can adjust the mass ratio according to technical requirements;

[0058] The polymer modified asphalt includes the following components: 100 parts of base asphalt, 15-25 parts of 80-250nm nano rubber powder, 10-15 parts of 0.5-1cm rubber particles, 2-5 parts of activator, 1-2.5 parts of epoxy adhesive, 0.5-1.2 parts of polyvinyl alcohol fiber, and 6-10 parts of composite synergist;

[0059] The particle size of single-size basalt aggregate is one of 5~10mm, 10~15mm, and 15~20mm.

[0060] In some embodiments of the present invention, one implementation method of the ratio of polymer modified asphalt is as follows: calculated by weight, the polymer modified asphalt includes the following components: 100 parts of base asphalt, 15-25 parts of 80-250nm nano rubber powder, 10-15 parts of 0.5-1cm rubber particles, 2-5 parts of activator, 1-2.5 parts of epoxy adhesive, 0.5-1.2 parts of polyvinyl alcohol fiber and 6-10 parts of composite synergist. Through the above ratio setting, the specific technical indicators in the following table are met after testing:

[0061] Table 1 Technical indicators of high elastic asphalt mixture 7

[0062]

[0063] The expansion joint expansion device in the embodiment of the present invention has good traffic bearing capacity and excellent anti-deformation ability through the arrangement of the above-mentioned structural form, and can effectively absorb the horizontal and vertical deformation caused by the expansion and contraction of the concrete slab and the vehicle load, thereby greatly reducing the probability of reflective cracks in the pavement structure.

[0064] According to another aspect of the embodiment of the present invention, there is also provided Figure 4 The pavement structure shown in the figure comprises: a structural base plate 100, a base layer 200, a lower layer 300 and a surface layer 400, wherein: the base layer 200 is laid on the structural base plate 100, and the base layer 200 and the structural base plate 100 have a deformation joint 101 separating the two in the vertical direction; the lower layer 300 is laid on the base layer 200, and there is a notch 301 in the base layer 200 above the deformation joint 101, and the above-mentioned deformation joint 101 expansion and contraction device is fixed in the notch 301; the surface layer 400 is laid on the lower layer 300. In the embodiment of the present invention, the surface layer 400 is provided to avoid direct contact between the elastic body 30 and the vehicle, thereby extending the service life of the tunnel deformation joint 101 pavement, and at the same time, the surface layer 400 is uniformly cast and paved, which improves the integrity and comfort of the pavement.

[0065] Specifically, in one embodiment of the present invention, the surface layer 400 is made of warm-mix flame-retardant asphalt concrete with a thickness of 40 to 45 mm;

[0066] The lower layer 300 is made of warm-mix asphalt concrete with a thickness of 60~65mm; the base layer 200 is made of ultra-tough cement-based composite material with a thickness of 200~250mm.

[0067] In addition, in some embodiments of the present invention, the connection method between the elastomer 30 and the slot 301 in the deformation expansion joint can be bonded using the epoxy resin interface agent 32 mentioned above. When bonding, the coating amount of the epoxy resin interface agent 32 is 1~1.5kg / m¬2; of course, it should be pointed out here that the connection method between the elastomer 30 and the slot 301 also has other structural forms. In some embodiments of the present invention, embedded parts or step forms can also be used, or the structure of the slot 301 can be improved, and the two ends of the elastomer 30 can be set to an inverted concave shape, and cast and plugged with the road surfaces on both sides to improve the reliability of the connection.

[0068] Please continue to refer to Figure 4 In the embodiment of the present invention, the deformation joint 101 is further filled with a caulking strip 201, which is a foam strip. It should be noted that the caulking strip 201 can effectively protect the deformation joint 101, and the foam strip is a compressible foam strip with a high temperature resistance of not less than 220 degrees Celsius.

[0069] In the above embodiment, the steel components are introduced at the deformation joint 101 to strengthen the integrity of the flexible deformation pavement with the tunnel main structure and the asphalt pavements on both sides, and the horizontal and vertical deformation resistance is improved; the epoxy resin interface agent 32 is set on the surface of the notch 301 to strengthen the bonding performance of the flexible deformation pavement with the tunnel main structure and the asphalt pavement contact surface on both sides; the elastomer 30 in the notch 301 adopts a high-elastic asphalt mixture with large deformation, and the expansion and contraction deformation of the concrete slab is absorbed by the high-elastic asphalt mixture. At the same time, under a certain pressure condition, the single-size aggregate gradually forms a void skeleton structure after being squeezed, which effectively limits the deformation of the pavement structure and can adapt to the deformation demand of ±3.5cm in the horizontal direction. This deformation can meet the large deformation demand of the tunnel entrance and exit positions and the structural settlement joints inside the tunnel; the base layer 200 adopts ultra-tough cement-based composite materials instead of traditional cement concrete, thereby improving the bending and tensile properties of the pavement structure, reducing the risk of expansion joints in the deformation joint 101, and effectively preventing the invasion of harmful substances from the outside, meeting the crack and seepage resistance requirements of the tunnel main structure.

[0070] In an embodiment of the present invention, a construction method of the above-mentioned pavement structure is also provided. Figure 5 As shown in , the following steps are included: In some embodiments of the present invention, the total thickness of the pavement structure is 350 mm;

[0071] S10: Cast a base layer 200 of a set thickness on the structural base plate 100, and leave a deformation joint 101 corresponding to the structural base plate 100, waiting for the base layer 200 to reach the design strength; when casting the base layer 200, its thickness is 250 mm, and the base layer 200 adopts an ultra-tough cement-based composite material.

[0072] S20: pouring the lower layer 300 on the base layer 200, the thickness of the lower layer 300 is 60mm, and warm-mix asphalt concrete is used. After the lower layer 300 reaches the design strength, a notch 301 is opened in the lower layer 300, and the notch 301 is opened above the deformation joint 101. The width of the notch 301 is 400mm and the depth is 60mm. When the notch 301 is opened, the bottom is exposed from the surface of the base layer 200; after the specific notching, the surface of the base layer 200 is cleaned to be dry and clean, and then the high-temperature resistant caulking strip 201 is filled into the deformation joint 101;

[0073] S30: Place the displacement support plate 10 above the deformation joint 101 and fix it on one side; the displacement support plate 10 has a specification of 9000mm×120mm×5mm. When fixing it on one side, expansion screws are used, and the depth of the expansion screws is not less than 70mm. After the displacement support plate 10 is fixed on one side, a rubber isolation layer is laid on the displacement support plate 10, and its specification is 9000mm×160×2mm.

[0074] S40: The elastic support assembly 20 is fixed in the notch 301 across the deformation joint 101, and at least two elastic assemblies are arranged in parallel and spaced apart in the width direction of the road surface; in some embodiments of the present invention, angle steel is used for fixing, and the angle steel is arranged on both sides of the bottom surface of the notch 301, 20 mm away from both sides of the lower layer 300, and the angle steel size is 35 mm × 50 mm × 7 mm Q235 angle steel, and then the spring telescopic rod is installed, that is, the rigid telescopic member 22 in the embodiment of the present invention;

[0075] S50: pouring the elastomer 30 into the slot 301, and the elastomer 30 fills the space in the slot 301; before pouring, first apply the epoxy resin interface agent 32 on the surface of the slot 301, the coating amount is 1kg / m¬2, and then apply the sealant 31, the sealant 31 is applied to the bottom of the slot 301 with a thickness of 5mm, and the side is applied with a thickness of 2mm; after the coating is completed, the pouring of the elastomer 30 is started, and the specific composition and ratio of the elastomer 30 have been described in detail above, and will not be repeated here;

[0076] S60: After the elastic body 30 reaches the designed strength, the surface layer 400 is laid on the lower layer 300. The surface layer 400 is laid uniformly to avoid contact between the vehicle and the elastic body 30, extend the service life of the expansion joint 101 expansion device, and improve driving comfort.

[0077] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A deformation joint expansion device, characterized in that: The device is installed in the slot above the expansion joint and includes: A displacement support plate, wherein the displacement support plate is arranged above the deformation joint, and the displacement support plate is fixedly arranged on one of the two sides of the deformation joint; The elastic support assembly includes a fixing seat fixed on both sides of the displacement support plate and a rigid telescopic member connected to the two fixing seats, wherein the rigid telescopic member is suspended and fixed above the deformation joint and has elasticity along the connecting line direction of the two fixing seats; An elastic body is filled in the notch above the deformation joint and immerses the elastic support assembly; Wherein, the two sides of the elastic body are connected to the side walls of the notch above the deformation joint. When the deformation joint is stretched and deformed, the elastic support component provides deformation buffering force. The displacement support plate is a steel plate, and a rubber isolation layer is laid on the displacement support plate. The elastic body and the rubber isolation layer can be relatively slidably arranged on the displacement support plate. When the elastic body is stretched or compressed, it moves on the steel plate with the rubber isolation layer. The rigid telescopic member is arranged in a straight line, and includes an internal sliding rod, a sliding sleeve sleeved on the internal sliding rod, and a first spring sleeved between the internal sliding rod and the sliding sleeve; The rigid telescopic member also includes a second spring sleeved outside the sliding sleeve, and the remaining part of the second spring is bonded and cured to the elastomer when the elastomer is cast.

2. The expansion joint expansion device according to claim 1, characterized in that: Both sides of the elastic body are coated with sealant.

3. The expansion joint expansion device according to claim 2, characterized in that: The outer side of the sealant is coated with an epoxy resin interface agent.

4. The expansion joint expansion device according to claim 1, characterized in that: The rigid telescopic member is arranged in an arch shape, including an arch tube, the arch tube including an arch segment and straight segments at both ends, and the rigid telescopic member also includes an inner rod sleeved on the two straight segments and a third spring sleeved between the inner rod and the arch tube.

5. The expansion joint expansion device according to claim 4, characterized in that: A fourth spring is also sleeved on the outside of the arched tube.

6. The expansion joint expansion device according to claim 1, characterized in that: The elastomer is a high-elastic asphalt mixture.

7. The expansion joint expansion device according to claim 6, characterized in that: The high elastic asphalt mixture is composed of polymer modified asphalt and single particle size basalt aggregate, and the mass ratio thereof is (30-40):100; The polymer modified asphalt comprises the following components: 100 parts of base asphalt, 15-25 parts of nano rubber powder of 80-250 nm, 10-15 parts of rubber particles of 0.5-1 cm, 2-5 parts of activator, 1-2.5 parts of epoxy adhesive, 0.5-1.2 parts of polyvinyl alcohol fiber, and 6-10 parts of composite synergist; The single-size basalt aggregate has a particle size of 5-10 mm, 10-15 mm, or 15-20 mm.

8. A pavement structure, characterized in that: include: Structural base, base layer, underlying layer and surface layer, of which: The base layer is laid on the structural bottom plate, and the base layer and the structural bottom plate have a deformation joint separating the two in the vertical direction; The lower layer is laid on the base layer, and a notch is provided in the base layer above the deformation joint, and a deformation joint expansion device as claimed in any one of claims 1 to 7 is fixed in the notch; The surface layer is laid on the underlying layer.

9. The pavement structure according to claim 8, characterized in that: The deformation joint is also filled with a caulking strip, which is a foam strip.

10. A method for constructing a pavement structure as claimed in claim 8 or 9, characterized in that: The following steps are involved: Pour a base layer of set thickness on the structural bottom plate, leave a deformation joint corresponding to the structural bottom plate, and wait for the base layer to reach the designed strength; Casting the lower layer on the base layer, and after the lower layer reaches the designed strength, opening a notch in the lower layer, wherein the notch is opened above the deformation joint, and when the notch is opened, the bottom is exposed from the surface of the base layer; Place the displacement support plate above the deformation joint and fix it on one side; Fixing an elastic support component in the notch across the deformation joint, wherein at least two elastic components are arranged in parallel and spaced apart along the width direction of the road surface; Casting an elastic body in the slot, and the elastic body fills the space in the slot; After the elastomer reaches the designed strength, the surface layer is laid on top of the underlying layer.

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