A road surface transition connection device

Abstract

The present invention relates to the field of road traffic technology and provides a road surface transition connection device comprising a top plate, a variable stiffness support structure, and a stiffness adjustment structure; the top surface of the variable stiffness support structure is connected to the bottom surface of the top plate; the stiffness of the variable stiffness support structure gradually decreases along the longitudinal direction of the top plate; the stiffness adjustment structure is located on the side of the variable stiffness support structure with less stiffness; the top surface of the stiffness adjustment structure is connected to the bottom surface of the top plate; the stiffness adjustment structure comprises an elastic element, and the stiffness adjustment structure is used to adjust the stiffness of the side of the road surface transition connection device with less stiffness. Using this road surface transition connection device can solve problems such as vehicle jumping at a bridge head caused by a sharp change in stiffness between a road surface and a bridge, or between two sections of road.

Description

Technical Field

[0001] The present invention relates to the technical field of road traffic, in particular to a road surface transition connection device. Background Art

[0002] In the construction of existing transportation routes, it is often necessary to connect two sections of bridges and roads, or two sections of roads with different structures. Taking the situation of connecting bridges and roads as an example, a bridge is a building structure built to cross obstacles such as rivers or canyons, and pile foundations are often used. Roads often use a base layer such as gravel or earth fill. However, since the fill behind the platform is difficult to compact, the structural stiffness of the road is relatively small, resulting in a sharp change in stiffness from the bridge to the road. Under the action of vehicle loads, the roadbed behind the platform often settles, which in turn causes bridgehead bouncing diseases. Similarly, road structures with different structures will also experience a sharp change in stiffness between the two sections due to different stiffness, which can also cause bouncing diseases in the connecting section between the two sections.

[0003] The existing conventional method is generally to lay a top plate on the fill between the bridge abutments or the joints between two sections of road, so as to disperse the load transmitted by vehicles, reduce the deformation of the road with weaker rigidity, and serve as a height transition between the bridge and the road, or between the two sections of road. However, this method does not fundamentally solve the problem of different rigidity between the bridge and the road, or between the two sections of road, and thus cannot fundamentally avoid the problems caused by the sudden change in rigidity, such as vehicle jumping at the bridge head. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem of vehicle jumping at the bridge head caused by the sharp change in stiffness between the road surface and the bridge, or between two different sections of road, and provide a road surface transition connection device.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A road surface transition connection device comprises a top plate, a variable stiffness support structure and a stiffness adjustment structure;

[0007] The top surface of the variable stiffness support structure is connected to the bottom surface of the top plate; the stiffness of the variable stiffness support structure gradually decreases along the longitudinal direction of the top plate;

[0008] The stiffness adjustment structure is located on the side of the variable stiffness support structure with smaller stiffness; the top surface of the stiffness adjustment structure is connected to the bottom surface of the top plate; the stiffness adjustment structure includes an elastic element, and the stiffness adjustment structure is used to adjust the stiffness of the side of the road surface transition connection device with smaller stiffness.

[0009] The longitudinal direction of the top plate refers to the direction corresponding to the longitudinal direction of the road or the longitudinal direction of the bridge when this solution is installed between the bridge and the road, or between different roads.

[0010] The stiffness of the variable stiffness support structure gradually decreases along the longitudinal direction of the top plate, which can be achieved in a variety of ways, such as gradually changing the density of the variable stiffness support structure along the longitudinal direction of the top plate, gradually changing the size of the variable stiffness support structure along the longitudinal direction of the top plate, or using materials with different stiffness at different parts of the variable stiffness support structure along the longitudinal direction of the top plate; the specific end values ​​of the stiffness at both ends of the variable stiffness support structure and the stiffness change law depend on actual needs.

[0011] The stiffness adjustment structure can adjust the stiffness by selecting elastic elements with different elastic coefficients or changing the number of elastic elements; the specific selection of the elastic element depends on the actual needs and the specific installation space, and the elastic element can be in the form of a rubber block or a spring.

[0012] When it is necessary to connect a bridge and a road, or two different sections of roads, the pavement transition connection device of this scheme is provided with a stiffness adjustment structure, and the stiffness of one end is designed to match the bridge or road with smaller stiffness, and the stiffness of the other end is designed to match the bridge or road with larger stiffness; if one end is a bridge with larger stiffness and the other end is a road with smaller stiffness, the pavement transition connection device of this scheme is provided with a stiffness adjustment structure, and the stiffness of one end is designed to match the road, and the stiffness of the other end is designed to match the bridge.

[0013] When installing the pavement transition connection device of this solution, the top plate of this solution is placed upward at the junction of the bridge and the road, or the junction between roads; wherein, one end of this solution with the stiffness adjustment structure faces the bridge and road with smaller stiffness, and the other end is connected to the bridge or road with larger stiffness; the connection between the bottom of this solution and the corresponding ground depends on the specific conditions on site. If the bottom of this solution is the road base, it can be anchored to the road base.

[0014] This solution connects a variable stiffness support structure to the bottom surface of the top plate, and the stiffness of the variable stiffness support structure gradually decreases along the longitudinal direction of the top plate, so that the overall stiffness of the pavement transition connection device of this solution gradually decreases along the longitudinal direction of the top plate; when the stiffness of the two ends of the pavement transition connection device of this solution is designed to match the roads or bridges at both ends respectively, and is correctly installed as described above, the stiffness transition between the bridge and the road, or between two different sections of roads can be achieved, avoiding the vehicle jumping disease caused by the sudden change in stiffness.

[0015] At the same time, considering that when the stiffness is small, the deformation difference of structures with different stiffness is more obvious when affected by load, the end with smaller stiffness of this scheme needs to more accurately match the stiffness of the corresponding bridge or road. Therefore, this scheme also sets a stiffness adjustment structure including elastic elements at the end with smaller stiffness of the pavement transition connection device, so that the stiffness of the stiffness adjustment structure can be flexibly adjusted by selecting elastic elements with different parameters or changing the number of elastic elements, so that the end with smaller stiffness of the pavement transition connection device of this scheme can be more accurately matched with the bridge or pavement connected to it, thereby ensuring the stiffness transition effect of this scheme; and an independent stiffness adjustment structure is set at the end with smaller stiffness. In the case of changes in the stiffness of the road or bridge on the side with smaller stiffness, such as the stiffness continues to decrease, the stiffness of the end with smaller stiffness of this scheme can be re-matched with the road or bridge at the corresponding end by replacing the stiffness adjustment structure with a different stiffness.

[0016] As a preferred solution of the present invention, the variable stiffness support structure includes a plurality of webs arranged longitudinally along the top plate; the top surface of the webs is connected to the bottom surface of the top plate; and the webs are distributed at intervals along the transverse direction of the top plate.

[0017] The variable stiffness support structure of this scheme includes a number of spaced-apart webs, which can gradually reduce the stiffness of the pavement transition connection device along the longitudinal direction of the top plate by, for example, changing the shape, external dimensions or spacing between adjacent webs along the longitudinal direction of the top plate.

[0018] The variable stiffness support structure of this solution includes multiple webs arranged at intervals along the transverse direction of the top plate. Compared with other forms such as solid components, it can reduce the raw material consumption and cost of the variable stiffness support structure of this solution during the production process, and also reduce the quality of the finished product of the variable stiffness support structure of this solution, thereby facilitating transportation and installation.

[0019] As a preferred solution of the present invention, the height of the web is T, and T gradually decreases along the direction in which the stiffness of the variable stiffness support structure decreases.

[0020] The height of the web refers to the height of the cross section of the web on a plane perpendicular to the longitudinal direction of the top plate.

[0021] The web used in this solution is one of the structures that gradually reduces or increases the stiffness of the variable stiffness support structure along the longitudinal direction of the top plate; compared with other solutions, such as the solution that gradually reduces or increases the thickness of the web along the longitudinal direction of the top plate, this solution has the characteristics of simple structure and easy processing and manufacturing.

[0022] As a preferred solution of the present invention, the distance between two adjacent webs is Ds, and Ds is ≥ 50 cm.

[0023] At the same time, this solution also defines the minimum spacing between two adjacent webs, which makes it easier for operators to enter the gap between the two adjacent webs for installation or maintenance operations.

[0024] As a preferred solution of the present invention, the web is provided with stiffening flanges along its edges.

[0025] The specific dimensions of the stiffening flange, such as thickness and width, depend on the specific load conditions. The stiffening flange may be set along the entire length of the web edge or may not be set along the entire length. For example, a stiffening flange may not be required for the portion where the web and top plate are connected.

[0026] This solution can prevent the web from deforming and becoming unstable, thereby improving the stability of the web.

[0027] As a preferred solution of the present invention, the stiffness adjustment structure further includes a damper.

[0028] The specific selection of the damper depends on the actual needs and the specific installation space. It can be in the form of a hydraulic damper or a rotary damper.

[0029] This solution adds a damper to the stiffness adjustment structure, which can help dissipate the mechanical energy stored in the elastic element and avoid continuous vibration of this solution under external influences.

[0030] As a preferred embodiment of the present invention, it also includes a base; the top surface of the base is connected to the bottom surface of the variable stiffness support structure; the center of gravity of the road transition connection device along the longitudinal direction of the top plate does not exceed the corresponding two ends of the base.

[0031] The position of the center of gravity of the pavement transition connection device along the longitudinal direction of the top plate does not exceed the corresponding two ends of the base, that is, if the position of the projection of the center of gravity of the pavement transition connection device on the top plate along the longitudinal direction of the top plate is a, and the positions of the projections of the two ends of the base along the longitudinal direction of the top plate on the top plate are b and c respectively, then a is located between b and c.

[0032] The specific structure of the top surface of the base depends on the structure of the variable stiffness support structure, and the specific size and coverage area of ​​the bottom surface of the base depend on the actual situation and specific needs of the construction site. For example, when the variable stiffness support structure includes a number of webs arranged at intervals along the transverse direction of the top plate, ribs of corresponding size and arrangement can be provided on the top surface of the base to connect the webs with the structure of the bottom surface of the base, while also improving the stability and out-of-plane stiffness of the bottom plate.

[0033] This solution sets a base for the variable stiffness support structure, which can increase the contact area between the variable stiffness support structure and its installation foundation, such as the road base, so that the connection between the variable stiffness support structure and the installation foundation can be more reliable, avoiding the overturning of the variable stiffness support structure and reducing the requirements for the installation foundation, such as the road base; at the same time, since the projection of the center of gravity of the pavement transition connection device of this solution on the top plate is located inside the corresponding projection of the base, the base of this solution can stabilize itself. When it is necessary to connect with the installation foundation, such as the road base, this solution does not require additional piling, and only needs to be connected to a building structure with greater stiffness through anchor rods, such as a reliable connection to the roadbed or abutment pedestal through anchor rods, or an anchor connection to the abutment back wall corbel.

[0034] As a preferred solution of the present invention, the base further includes a connecting wing plate; the projection of the connecting wing plate on the plane where the top plate is located is outside the top plate.

[0035] When the base and its installation foundation, such as a road base, are connected by anchor rods, if the projection of the base on the plane where the top plate is located is completely inside the top plate, there is a situation where the anchor rod is too long and cannot fit into the space between the top plate and the base, resulting in the anchor rod being unable to be installed, that is, the base cannot be connected to the installation foundation.

[0036] This solution corresponds to this situation. A connecting wing plate is set on the base, and the projection of the connecting wing plate on the plane where the top plate is located is located outside the top plate, so that an anchor rod with a length exceeding the distance between the base and the top plate can be installed.

[0037] As a preferred embodiment of the present invention, it also includes an upper cylinder and a lower cylinder; one end of the upper cylinder is detachably connected to the bottom surface of the top plate, and the other end of the upper cylinder is sleeved with the lower cylinder; the upper cylinder and the lower cylinder are capable of sliding relative to each other; the elastic element is arranged inside the upper cylinder and the lower cylinder; when the stiffness adjustment structure also includes a damper, the damper is also arranged inside the upper cylinder and the lower cylinder.

[0038] The cross-sectional shapes of the upper and lower cylinders can be various shapes, such as round or square; the cooperation between the upper and lower cylinders can be that the upper cylinder is sleeved in the lower cylinder, or the lower cylinder is sleeved in the upper cylinder; the relative sliding stroke between the upper and lower cylinders depends on the stroke of the elastic element installed inside them.

[0039] In this solution, the elastic element is installed inside the upper cylinder and the lower cylinder, which can protect the elastic element; when the stiffness adjustment structure also includes a damper, the damper is also installed inside the upper cylinder and the lower cylinder, which can protect the damper and also limit the deformation of the damper and the elastic element to be synchronized with the relative sliding between the upper cylinder and the lower cylinder, that is, it can coordinate the deformation of the damper and the elastic element.

[0040] As a preferred solution of the present invention, the longitudinal length of the top plate is L, and L is ≥ 6m.

[0041] This solution limits the minimum length of the top plate along the longitudinal direction of the bridge, ensuring that the pavement transition connection device of this solution has sufficient distance from the end with greater stiffness to the end with less stiffness, thereby making the stiffness change trend smoother.

[0042] As a preferred solution of the present invention, the variable stiffness support structure further includes an end plate; the end plate is located on a side of the variable stiffness support structure with greater stiffness.

[0043] The specific structure of the end plate and the connection method used depend on the structural form of the specific bridge or road to which it is connected. If the corresponding position of the bridge or road is equipped with steel components, the end plate can be designed to be welded or bolted to the steel components; if the corresponding position of the bridge or road is equipped with reinforced concrete components, the end plate can be designed to be connected to the reinforced concrete components through anchor rods, or to the pre-embedded connectors in the reinforced concrete components, such as steel plate bolts pre-embedded at the end of the concrete.

[0044] This solution provides an end plate on the side of the variable stiffness support structure with greater stiffness, which can achieve a more reliable connection between the road surface transition connection device and the bridge or road on the corresponding side.

[0045] As a preferred solution of the present invention, transverse ribs are further provided in the variable stiffness support structure.

[0046] The specific structure of the transverse ribs and the layout position of the transition connection device relative to the road surface are designed according to the actual load conditions.

[0047] This solution adds transverse ribs, which can form a lattice stiffening system together with the top plate and other structures in the variable stiffness support structure, thereby making this solution have higher strength.

[0048] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0049] 1. This solution connects a variable stiffness support structure to the bottom surface of the top plate, and the stiffness of the variable stiffness support structure gradually decreases along the longitudinal direction of the top plate, so that the overall stiffness of the pavement transition connection device of this solution gradually decreases along the longitudinal direction of the top plate; when the stiffness of the two ends of the pavement transition connection device of this solution is designed to match the roads or bridges at both ends respectively, and is correctly installed as described above, the stiffness transition between the bridge and the road, or between two different sections of road can be achieved, avoiding the vehicle jumping disease caused by the sudden change in stiffness.

[0050] At the same time, considering that when the stiffness is small, the deformation difference of structures with different stiffness is more obvious when affected by load, the end with smaller stiffness of this scheme needs to more accurately match the stiffness of the corresponding bridge or road. Therefore, this scheme also sets a stiffness adjustment structure containing elastic elements at the end with smaller stiffness of the pavement transition connection device, so that the stiffness of the stiffness adjustment structure can be flexibly adjusted by selecting elastic elements with different parameters or changing the number of elastic elements, so that the end with smaller stiffness of the pavement transition connection device of this scheme can be more accurately matched with the bridge or pavement connected to it, thereby ensuring the stiffness transition effect of this scheme; and an independent stiffness adjustment structure is set at the end with smaller stiffness. In the case of changes in the stiffness of the road or bridge on the side with smaller stiffness, such as the stiffness continues to decrease, the stiffness of the end with smaller stiffness of this scheme can be re-matched with the road or bridge at the corresponding end by replacing the stiffness adjustment structure with different stiffness. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a side view schematic diagram of a road surface transition connection device of the present invention;

[0052] Figure 2 It is a partial enlarged schematic diagram of the stiffness adjustment structure;

[0053] Figure 3 This is a schematic diagram of the change of stiffness of a pavement transition connection device along the longitudinal direction of the top plate of the present invention;

[0054] Figure 4 This is a schematic diagram of the installation state of a pavement transition connection device of the present invention used for connecting different road structures;

[0055] Figure 5 This is a schematic diagram of the installation state of a pavement transition connection device of the present invention used for the connection between a road and a bridge;

[0056] Figure 6 It is a schematic diagram of the three-dimensional structure of a road surface transition connection device of the present invention;

[0057] Figure 7 It is a schematic diagram of the local three-dimensional structure at the web;

[0058] Figure 8 It is a partial three-dimensional structural schematic diagram of a pavement transition connection device of the present invention with the web removed;

[0059] Figure 9 is a schematic diagram of the three-dimensional structure of the base in Example 1;

[0060] Icons: 1-road base; 2-abutment back wall; 3-top plate; 31-road one; 32-road two; 41-web; 42-base; 43-end plate; 44-stiffening flange; 45-transverse rib; 46-connecting wing plate; 5-stiffness adjustment structure; 51-elastic element; 52-damper; 53-upper cylinder; 54-lower cylinder; 421-vertical plate; 422-bottom plate. DETAILED DESCRIPTION

[0061] The present invention will be described in detail below with reference to the accompanying drawings.

[0062] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0063] Example 1

[0064] like Figure 1 、 Figure 4 and Figure 5 、 Figure 6 As shown, a pavement transition connection device adopted in this embodiment includes a top plate 3, a variable stiffness support structure and a stiffness adjustment structure 5; the top surface of the variable stiffness support structure is connected to the top plate 3; the bottom surface of the variable stiffness support structure is used to connect with the road base 1; the height of the cross section of the variable stiffness support structure is T, and T gradually increases or decreases along the longitudinal direction of the top plate 3; the stiffness adjustment structure 5 is located on the side of the variable stiffness support structure with a smaller T; one end of the stiffness adjustment structure 5 is connected to the side of the top plate 3 facing the variable stiffness support structure, and the other end of the stiffness adjustment structure 5 is used to connect with the road base 1; the stiffness adjustment structure 5 includes a damper 52 and an elastic element 51, and the strokes of the damper 52 and the elastic element 51 are set to be along the vertical direction.

[0065] Specifically, the main structure of the variable stiffness support structure is composed of a base 42, an end plate 43 and a plurality of webs 41; the webs 41 are plates arranged along the longitudinal direction of the top plate 3 and perpendicular to the top plate 3, and their cross-sectional height is as follows: Figure 1 As shown, along Figure 1 The vertical direction gradually increases and decreases from bottom to top, so that the overall structural stiffness of the road surface transition connection device of this embodiment gradually decreases from bottom to top, and the top surface of the web 41 is horizontal, so that it can fit with the bottom surface of the top plate 3; Figure 3As shown in , the horizontal axis is the coordinate of the specified position on the variable stiffness support structure along the longitudinal direction of the top plate 3, and the vertical axis is the structural stiffness of the road surface transition connection device of this embodiment at the specified position; wherein K1 is the maximum stiffness value, which matches the high stiffness structure to be connected, such as a bridge; K2 is the minimum stiffness value, which matches the low stiffness structure to be connected, such as a road. In addition, for this embodiment, the stiffness of the variable stiffness support structure at the end with smaller stiffness is much smaller than K1, that is, without installing the stiffness adjustment structure 5, the stiffness of the road surface transition connection device of this embodiment at the end with smaller stiffness is much smaller than K 1, so that the stiffness value of the road surface transition connection device of this embodiment at the end with smaller stiffness can be reduced by replacing the stiffness adjustment structure 5 with smaller stiffness, thereby adapting to the situation that the road stiffness of the corresponding end gradually decreases during actual use; at the same time, the length of the top plate 3 and the web 41 along the longitudinal direction of the top plate 3 of this embodiment is L, L ≥ 6m, thereby reducing the inclination angle α of the change curve of the structural stiffness of the road surface transition connection device; the webs 41 are distributed at intervals along the transverse direction of the top plate 3, and the spacing between two adjacent webs 41 is Ds, Ds ≥ 50cm, thereby facilitating the entry of operators.

[0066] End plate 43 Figure 1 and Figure 8 As shown, it is connected to the lower side of the web 41 along the up-down direction in the figure, and is provided with a number of mounting holes for installing anchor rods, so that it can be connected to the abutment back wall 2 by bolts; if a metal part is provided on the abutment back wall 2, the end plate 43 can also be directly welded to the corresponding structure of the abutment back wall 2.

[0067] The base 42 is connected to the side of the web 41 away from the top plate 3, and since this embodiment includes a plurality of webs 41 distributed laterally along the top plate 3, the base 42 of this embodiment is as follows: Figure 1 and Figure 9 As shown, it includes a bottom plate 422 and a vertical plate 421; wherein the bottom plate 422 is used to connect with the ground, such as the road base 1; the vertical plate 421 is used to connect the webs 41 and the bottom plate 422, so its number and arrangement correspond to the webs 41, its top size corresponds to the bottom size of the web 41, and its bottom size along the longitudinal direction of the top plate 3 corresponds to the corresponding size of the bottom plate 422, thereby forming Figure 1As shown in the figure, the size of the vertical plate 421 along the vertical direction gradually increases from left to right in the figure, so that the plate formed by the vertical plate 421 and the web 41 forms a shape in which the size along the vertical direction in the figure first decreases and then increases from left to right, and then forms a semi-frame structure together with the end plate 43, the top plate 3 and the bottom plate 422, thereby enhancing the overall stability of this solution; further, the center of gravity of the pavement transition connection device of this embodiment is projected on the road base 1 within the corresponding projection of the base 42, so that the pavement transition connection device of this solution can be stabilized by itself with the base 42; a number of mounting holes for installing anchor rods are distributed on the base 42, so that it can be connected to the road base 1 through the anchor rods.

[0068] It should be noted that if Figure 9 As shown, in this embodiment, the web 41 and the base 42 and the vertical plate 421 thereon are introduced and numbered separately, but the web 41 and the vertical plate 421 can be independent components, which are spliced ​​together by welding or threaded connections to facilitate manufacturing and installation, or they can be one-piece components, that is, the web 41 and the vertical plate 421 are two parts of the same plate, thereby ensuring the overall structural strength of the variable stiffness support structure.

[0069] like Figure 1 and Figure 8 As shown, a number of transverse ribs 45 are also provided in the variable stiffness support structure to further increase the strength of the variable stiffness support structure; the transverse ribs 45 are plates arranged along the transverse direction of the top plate 3 and perpendicular to the top plate 3, and are specifically installed on one side of the top plate 3 facing the base 42 and one side of the base 42 facing the top plate 3.

[0070] like Figure 1 and Figure 7 As shown, a stiffening flange 44 is further provided along the edge of the web 41. The stiffening flange 44 in this embodiment is specifically a plate with a thickness and width of 12 cm and 140 cm respectively, and the parts of the web 41 connected to the top plate 3, the end plate 43 and the base 42 are not repeatedly provided.

[0071] During installation, the base 42 of the pavement transition connection device of this embodiment is placed downward at the junction of the bridge and the road, and anchor rods are inserted into the mounting holes of the base 42 to connect it to the road base 1, and anchor rods are inserted into the mounting holes of the end plate 43 to connect it to the abutment back wall 2. Finally, UHPC ultra-high toughness concrete and asphalt pavement are laid on top of the top plate 3.

[0072] It should be noted that Figure 1 The proportions and outlines of each component have been adjusted for ease of observation and do not represent the actual proportions.

[0073] Figure 4The pavement transition connection device of this embodiment is used to connect two sections of roads with different stiffness, namely, Road 1 31 and Road 2 32 in the figure. Road 2 32 has greater stiffness, so the end of the pavement transition connection device of this embodiment with greater stiffness is connected to it, specifically, the end plate 43 is welded to the road 32; after the pavement transition connection device is installed, asphalt pavement and UHPC ultra-high toughness concrete can be laid on the top plate 3; an expansion joint can be reserved between the pavement transition connection device and Road 1 31.

[0074] Figure 5 The pavement transition connection device of this embodiment is used to connect the bridge and the road, that is, the road 31 and the abutment back wall 2 in the figure. The abutment back wall 2 has a larger rigidity, so the end of the pavement transition connection device of this embodiment with a larger rigidity is connected thereto, specifically, the end plate 43 and the abutment back wall 2 are connected by anchor rods, and the base 42 is also connected to the corbel of the abutment back wall 2 by anchor rods; after the pavement transition connection device is installed, asphalt pavement and UHPC ultra-high toughness concrete can be laid on top of the top plate 3; an expansion joint can be reserved between the pavement transition connection device and the road 31.

[0075] Example 2

[0076] like Figure 2 As shown, based on Example 1, the stiffness adjustment structure 5 further includes an upper cylinder 53 and a lower cylinder 54; one end of the upper cylinder 53 is detachably connected to the bottom side of the top plate 3 facing the variable stiffness support structure, and the other end of the upper cylinder 53 is sleeved with the lower cylinder 54, so that the upper cylinder 53 and the lower cylinder 54 can slide relative to each other; the other end of the lower cylinder 54 is used for detachable connection with the road base 1; the damper 52 and the elastic element 51 are both arranged inside the upper cylinder 53 and the lower cylinder 54.

[0077] Specifically, in this embodiment, the cross-sections of the upper cylinder 53 and the lower cylinder 54 are both rectangular, and the inner cavity size of the upper cylinder 53 is larger than the outer size of the lower cylinder 54, so that when installed, the lower cylinder 54 is sleeved in the inner cavity of the upper cylinder 53, which can prevent relics from falling into the gap between the upper cylinder 53 and the lower cylinder 54 and thus getting stuck in the upper cylinder 53 and the lower cylinder 54; and since the bottom of the top plate 3 in this embodiment is provided with a plurality of webs 41 distributed at intervals along the transverse direction of the top plate 3, this embodiment provides a supporting bottom plate at the bottom of the side with a smaller cross-sectional height of the web 41, and the supporting bottom plate is the same width as the top plate 3, and the upper cylinder 53 is connected to the bottom of the top plate 3 through the supporting bottom plate.

[0078] For this embodiment, the upper cylinder 53 and the lower cylinder 54 are respectively connected to the top plate 3 and the road base 1 by bolt threads, so that they can be installed and replaced; when replacing, a jack can be used as a temporary support, and then the bolts connecting the upper cylinder 53 and the top plate 3, and the lower cylinder 54 and the road base 1 are removed, and finally the old stiffness adjustment structure 5 is taken out and the new stiffness adjustment structure 5 is reinstalled; the new stiffness adjustment structure 5 can have different stiffness and size according to actual needs.

[0079] Correspondingly, the damper 52 of this embodiment uses a cylindrical viscous damper 52, and the elastic element 51 uses a helical compression spring. When the internal space of the upper cylinder 53 and the lower cylinder 54 is insufficient, the damper 52 and the elastic element 51 can be coaxially arranged to save space; for the same group of upper cylinder 53 and lower cylinder 54, the axes of the damper 52 and the elastic element 51 inside can be set on the same longitudinal section.

[0080] In this embodiment, the damper 52 and the elastic element 51 can be installed inside the upper cylinder 53 and the lower cylinder 54, which can protect the damper 52 and the elastic element 51. At the same time, it also limits the deformation of the damper 52 and the elastic element 51 and the relative sliding synchronization between the upper cylinder 53 and the lower cylinder 54, that is, it can coordinate the deformation of the damper 52 and the elastic element 51.

[0081] Example 3

[0082] like Figure 1 and Figure 4 As shown, based on embodiments 1 and 2, the base 42 further includes a connecting wing plate 46; the projection of the connecting wing plate 46 on the road base 1 is outside the corresponding projection of the top; the connecting wing plate 46 is used to connect to the road base 1.

[0083] Specifically, such as Figure 1 As shown, the base 42 is provided with a connecting wing plate 46 on the lower side in the up-down direction in the figure, and mounting holes for mounting screws are distributed on the connecting wing plate 46 so that it can be connected to the road base 1 through the screws.

[0084] This embodiment is suitable for situations where the anchor rod is too long and cannot be placed in the space between the top plate 3 and the base 42 . An anchor rod whose length exceeds the distance between the base 42 and the top plate 3 can be installed.

[0085] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A road surface transition connection device, characterized in that: It comprises a top plate (3), a variable stiffness support structure and a stiffness adjustment structure (5); The top surface of the variable stiffness support structure is connected to the bottom surface of the top plate (3); the stiffness of the variable stiffness support structure gradually decreases along the longitudinal direction of the top plate (3); the variable stiffness support structure comprises a base (42), an end plate (43) and a plurality of webs (41); The webs (41) are arranged longitudinally along the top plate (3), and the top surface of the webs (41) is connected to the bottom surface of the top plate (3); the webs (41) are distributed at intervals along the transverse direction of the top plate (3), and the cross-sectional height of the webs (41) gradually decreases from one end of the variable stiffness support structure with greater stiffness to the other end; The base (42) is connected to a side of the web (41) facing away from the top plate (3), and the base (42) includes a bottom plate (422) and a vertical plate (421), wherein the bottom plate (422) is used to be connected to the ground, and the vertical plate (421) is used to connect the webs (41) and the bottom plate (422); the number and arrangement of the vertical plates (421) correspond to the webs (41), the top size of the vertical plates (421) corresponds to the bottom size of the webs (41), the bottom size of the vertical plates (421) along the longitudinal direction of the top plate (3) corresponds to the corresponding size of the bottom plate (422), and the size of the plate formed by the vertical plates (421) and the webs (41) along the longitudinal direction of the top plate (3) first decreases and then increases from top to bottom in the height direction; The end plate (43) is connected to a side of the variable stiffness support structure having greater stiffness, and the end plate (43) is used for fixed connection to a road or bridge on the corresponding side; The stiffness adjustment structure (5) is located on the side of the variable stiffness support structure with smaller stiffness; the top surface of the stiffness adjustment structure (5) is connected to the bottom surface of the top plate (3); the stiffness adjustment structure (5) includes an elastic element (51), and the stiffness adjustment structure (5) is used to adjust the stiffness of the side of the road surface transition connection device with smaller stiffness.

2. A road surface transition connection device according to claim 1, characterized in that: The web (41) is provided with a stiffening flange (44) along its edge.

3. A road surface transition connection device according to claim 1, characterized in that: The stiffness adjustment structure (5) further includes a damper (52).

4. A road surface transition connection device according to claim 1, characterized in that: The base (42) further includes a connecting wing plate (46); a projection of the connecting wing plate (46) on the plane where the top plate (3) is located is outside the top plate (3).

5. A road surface transition connection device according to any one of claims 1 to 4, characterized in that: The invention also comprises an upper cylinder (53) and a lower cylinder (54); one end of the upper cylinder (53) is detachably connected to the bottom surface of the top plate (3), and the other end of the upper cylinder (53) is sleeved with the lower cylinder (54); the upper cylinder (53) and the lower cylinder (54) are capable of sliding relative to each other; the elastic element (51) is arranged inside the upper cylinder (53) and the lower cylinder (54); when the stiffness adjustment structure (5) further comprises a damper (52), the damper (52) is also arranged inside the upper cylinder (53) and the lower cylinder (54).

6. A road surface transition connection device according to any one of claims 1 to 4, characterized in that: The longitudinal length of the top plate (3) is L, and L is ≥ 6 m.

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