Road widening structure

Abstract

The invention provides a road widening structure which comprises a widening road surface, a widening base layer and an anti-sedimentation device, the widening road surface and the widening base layer are in butt joint with an original road surface and an original base layer respectively, and the original road surface and the widening road surface are laid on the top of the original base layer and the top of the widening base layer; the original base layer and the widening base layer are laid on the top of the original base layer, and the anti-sedimentation devices are arranged at the joints of the original road surface, the widening road surface, the original base layer and the widening base layer. Compared with the prior art, the road widening structure has the following beneficial effects that in the road widening structure provided by the invention, the inclination angle T-shaped FRP parts are adopted as the anti-sedimentation devices and are ingeniously arranged at the joint positions of the original road surface and the widening road surface and the joint positions of the original base layer and the widening base layer. The FRP has the excellent performance of high strength, light weight, corrosion resistance and the like, and the design of the T-shaped inclination angle can better adapt to the stress characteristics of a road widening structure.

Description

Technical Field

[0001] This invention is a road widening structure, belonging to the field of road widening and reinforcement. Background Technology

[0002] In the process of transportation infrastructure construction and continuous development, road widening and reconstruction projects are increasingly common to meet the growing traffic flow demands. Road widening, as a key component, effectively improves road capacity, but faces numerous technical challenges during actual construction and subsequent use. The splicing structure between the original road surface and the widened surface, and between the original base course and the widened base course, is the core of road widening projects. However, due to the complexity of the geological environment where roads are located, soil conditions vary significantly in different areas, leading to uneven distribution of soil pressure. Simultaneously, the original road surface and the widened surface themselves have considerable self-weight, coupled with increasing vehicle loads; these factors combine to generate complex and significant forces on the widening structure.

[0003] Under the combined influence of these factors, widened pavements and base courses are highly susceptible to uneven settlement. Once settlement occurs, significant settlement differences will arise between the original pavement and the widened pavement, and between the original base course and the widened base course. This settlement difference not only disrupts the smoothness of the road surface, causing noticeable bumps and reducing driving comfort, but more seriously, when the settlement difference exceeds a certain range, it poses a serious threat to normal vehicle safety and increases the probability of traffic accidents. Furthermore, settlement difference accelerates the damage to the road structure and shortens the road's service life. Uneven settlement can cause cracks, potholes, and other defects in the pavement. Rainwater can seep into the base course through these damaged areas, further damaging its stability, creating a vicious cycle that increases road maintenance costs and repair difficulties. Currently, empirical design methods cannot accurately address complex geological conditions and load situations, cannot effectively limit the settlement of widened pavements and base courses, and cannot guarantee that the settlement difference between the original pavement and the widened pavement, and between the original base course and the widened base course, remains within permissible limits. Therefore, this invention proposes a road widening structure and calculation method, which uses an inclined T-shaped FRP component settlement device to precisely control the settlement difference, enhance the structural synergy and stability, ensure driving safety and extend the service life of the road. Summary of the Invention

[0004] In view of the shortcomings of existing technologies, the purpose of this invention is to provide a road widening structure.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A road widening structure includes a widened pavement, a widened base course, and an anti-settlement device. The widened pavement and the widened base course are respectively connected to the original pavement and the original base course. The original pavement and the widened pavement are laid on top of the original base course and the widened base course. The original base course and the widened base course are laid on top of the original base course. The anti-settlement device is provided at the joint between the original pavement, the widened pavement, the original base course, and the widened base course.

[0007] Furthermore, the anti-settlement device is an angled T-shaped FRP component, and the angled T-shaped FRP component is a pultruded profile.

[0008] Furthermore, the tilted T-shaped FRP component includes a plurality of diagonal bars spaced apart along the length of the tilted T-shaped FRP component, with the two ends of the diagonal bars connected to the flange plate and the plate rib, respectively.

[0009] Furthermore, both the flange plate and the plate rib are provided with connecting components at their connection ends with the diagonal bar, and the connecting components are connected to the diagonal bar by bolts.

[0010] Furthermore, the calculation steps for the road widening structure include:

[0011] The bearing capacity of the flange plates and ribs of the FRP components is calculated based on the basic combination of earth pressure, self-weight and vehicle load of the original road surface, original base course and widened road surface and widened base course.

[0012] The deformation of the flange plate of the FRP component is calculated based on the quasi-permanent combination and frequent combination of earth pressure, self-weight and vehicle load of the original pavement, original base course and widened pavement and widened base course.

[0013] Based on the deformation difference between the left and right flanges of the FRP component, the settlement difference between the original pavement and the widened pavement, as well as between the original base course and the widened base course, is verified.

[0014] Furthermore, the load-bearing capacity calculation formulas for the flange plate and the rib plate of the FRP component are as follows:

[0015] ;

[0016] In the formula: This indicates the load-bearing capacity of the flange of the FRP component; This represents the basic combination of earth pressure, self-weight, and vehicle load acting on the flange of the FRP component; This represents the basic combination of earth pressure and self-weight acting on the plate ribs of the FRP component;

[0017] The formula for calculating the load-bearing capacity of the FRP component flange is as follows:

[0018] ;

[0019] In the formula: This indicates the load-bearing capacity of the flange of the FRP component; t represents the ultimate tensile strength of FRP; t represents the thickness of the root of the flange plate or rib of the FRP component; l represents the length of the flange plate or rib of the FRP component along the splicing direction.

[0020] The calculation formula for the basic combination of earth pressure, self-weight, and vehicle load acting on the flange of the FRP component is as follows:

[0021] ;

[0022] In the formula: This represents the basic combination of earth pressure, self-weight, and vehicle load acting on the flange of the FRP component; This represents the basic combination of earth pressure, self-weight, and vehicle load on the left flange of the FRP component. This represents the basic combination of earth pressure, self-weight, and vehicle load on the right flange of the FRP component.

[0023] The calculation formulas for the basic combination of earth pressure, self-weight, and vehicle load on the left flange of the FRP component are as follows:

[0024] ;

[0025] In the formula: This represents the basic combination of earth pressure, self-weight, and vehicle load on the left flange of the FRP component. A basic combination function representing earth pressure, self-weight, and vehicle load; This indicates the earth pressure acting on the left flange of the FRP component, calculated based on the earth pressure of the original pavement or base course within a 45-degree line at the end of the left flange of the FRP component. This indicates the soil self-weight acting on the left flange of the FRP component, calculated based on the soil self-weight of the original road surface or base course within the width range of the left flange of the FRP component; This indicates the lane load acting on the original road surface;

[0026] The calculation formulas for the basic combination of earth pressure, self-weight, and vehicle load on the right flange of the FRP component are as follows:

[0027] ;

[0028] In the formula: This represents the basic combination of earth pressure, self-weight, and vehicle load on the right flange of the FRP component. A basic combination function representing earth pressure, self-weight, and vehicle load; This indicates the earth pressure acting on the right flange of the FRP component, calculated based on the earth pressure within the 45-degree line at the end of the right flange of the FRP component when widening the pavement or base course. This indicates the soil self-weight acting on the right flange of the FRP component, calculated based on the soil self-weight of the widened pavement or base course within the width range of the right flange of the FRP component. This indicates the lane load acting on the widened road surface;

[0029] The calculation formula for the basic combination of earth pressure and self-weight acting on the ribs of the FRP component is as follows:

[0030] ;

[0031] In the formula: This represents the basic combination of earth pressure and self-weight acting on the plate ribs of the FRP component; A basic combination function representing earth pressure and self-weight; This indicates the earth pressure of the original road surface or base course acting on the ribs of the FRP component, calculated according to the earth pressure of the original road surface or base course within the range to the right of the ribs of the FRP component. This indicates the soil self-weight acting on the FRP component ribs, calculated based on the soil self-weight of the original road surface or base course on the FRP component ribs.

[0032] Furthermore, the deformation calculation formula for the flange of the FRP component is as follows:

[0033] ;

[0034] In the formula: This indicates the amount of deformation of the flange of the FRP component; This indicates the amount of deformation on the left flange of the FRP component; This indicates the amount of deformation on the right flange of the FRP component;

[0035] The formula for calculating the deformation of the left flange of the FRP component is as follows:

[0036] ;

[0037] In the formula: This indicates the amount of deformation on the left flange of the FRP component; This represents the quasi-permanent and frequent combinations of soil pressure, self-weight, temperature, and vehicle load on the original road surface and base course on the left flange of the FRP component. E represents the quasi-permanent and frequent combinations of earth pressure, self-weight, temperature, and vehicle load on the widened pavement and base course on the left flange of the FRP component; E represents the elastic modulus of FRP. Represents the moment of inertia, where The calculation formula is as follows:

[0038] ;

[0039] In the formula: The value represents the moment of inertia; l represents the length of the FRP component flange (10) or rib (11) along the splicing direction (14); t represents the thickness at the root of the FRP component flange (10) or rib (11);

[0040] The formula for calculating the deformation of the right flange of the FRP component is as follows:

[0041] ;

[0042] In the formula: This indicates the amount of deformation on the right flange of the FRP component; This represents the quasi-permanent and frequent combinations of earth pressure, self-weight, temperature, and vehicle load on the widened pavement along the right flange of the FRP component. E represents the quasi-permanent and frequent combinations of soil pressure, self-weight, temperature, and vehicle load on the widened base layer on the right flange of the FRP component; E represents the elastic modulus of FRP. It represents the moment of inertia.

[0043] Furthermore, the formula for calculating the deformation difference between the left flange and the right flange of the FRP component is as follows:

[0044] ;

[0045] In the formula: This indicates the deformation difference between the left and right flanges of the FRP component; This indicates the amount of deformation on the left flange of the FRP component; This indicates the amount of deformation on the right flange of the FRP component.

[0046] Furthermore, the formula for calculating the settlement difference between the original road surface and the widened road surface, and between the original base course and the widened base course, is as follows:

[0047] ;

[0048] In the formula: This indicates the difference in settlement between the original pavement and the widened pavement, as well as between the original base course and the widened base course. This indicates the deformation difference between the left and right flanges of the FRP component; This indicates the allowable value for differential settlement. =5mm.

[0049] The beneficial effects of this invention are:

[0050] In the road widening structure provided by this invention, the anti-settlement device adopts an inclined T-shaped FRP component, cleverly positioned at the joint between the original road surface and the widened road surface, and between the original base course and the widened base course. FRP (fiber reinforced polymer) possesses excellent properties such as high strength, lightweight, and corrosion resistance. The inclined T-shaped design better adapts to the stress characteristics of the road widening structure. This component can effectively disperse and bear the forces generated by soil pressure, self-weight, and vehicle loads, thereby significantly limiting the settlement of the widened road surface and the widened base course, controlling the settlement within a minimal range, and effectively avoiding various problems caused by excessive settlement.

[0051] This invention's unique calculation method can accurately calculate the bearing capacity and deformation of FRP component flanges and ribs based on different combinations of earth pressure, self-weight, and vehicle loads of the original pavement, original base course, and widened pavement and base course. Based on these precise calculation results, it is possible to accurately verify whether the settlement difference between the original pavement and the widened pavement, and between the original base course and the widened base course, meets the requirements. This ability to precisely control settlement difference ensures the smoothness and stability of the widened road, greatly improving driving comfort and safety, and reducing the probability of traffic accidents caused by settlement differences.

[0052] This invention effectively limits the settlement of widened pavements and base courses, precisely controls differential settlement, and enhances the stability of the widened road structure. It reduces the occurrence of pavement defects such as cracks and potholes caused by settlement and uneven settlement. It also prevents further damage to the base course from rainwater, delaying the damage process of the road structure from the source, significantly extending the service life of the road, reducing maintenance costs and repair frequency, and improving the economic and social benefits of road construction. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of a road widening structure according to the present invention;

[0055] Figure 2 This is a schematic diagram of the connection structure of the inclined T-shaped FRP component in the road widening structure of the present invention;

[0056] Figure 3 This is a schematic diagram of an inclined T-shaped FRP component for a road widening structure according to the present invention;

[0057] Figure 4This is a schematic diagram illustrating the calculation of the flange plate of an FRP component in a road widening structure according to the present invention;

[0058] Figure 5 This is a schematic diagram illustrating the calculation of the rib plate of a road widening structure according to the present invention.

[0059] In the diagram, 1. Original road surface; 2. Original base course; 3. Original subbase course; 4. Widened road surface; 5. Widened base course; 6. Anti-settlement device; 7. Inclined T-shaped FRP component; 8. Joint; 81. Left flange of FRP component; 82. Right flange of FRP component; 9. Diagonal bar; 10. Flange plate; 11. Rib plate; 12. Bolt; 13. Connecting component; 14. Splicing direction; 15. 45-degree line. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] Please see Figures 1-5 This invention provides a road widening structure technical solution, including a widened pavement 4, a widened base course 5, and an anti-settlement device 6. The widened pavement 4 and the widened base course 5 are respectively connected to the original pavement 1 and the original base course 2. The original pavement 1 and the widened pavement 4 are laid on top of the original base course 2 and the widened base course 5. The original base course 2 and the widened base course 5 are laid on top of the original base course 3. The anti-settlement device 6 is provided at the joint 8 of the original pavement 1, the widened pavement 4, the original base course 2, and the widened base course 5 to limit the settlement of the widened pavement 4 and the widened base course 5, and to ensure that the settlement difference between the original pavement 1 and the widened pavement 4, and between the original base course 2 and the widened base course 5, is within the permissible range.

[0062] See Figures 2-3 The anti-settlement device 6 is an angled T-shaped FRP component 7, which is a pultruded profile. The angled T-shaped FRP component 7 includes a plurality of diagonal rods 9 spaced apart along the length direction 14 of the angled T-shaped FRP component 7. The two ends of the diagonal rods 9 are respectively connected to the flange plate 10 and the plate rib 11. The connection ends of the flange plate 10 and the plate rib 11 with the diagonal rods 9 are provided with connecting parts 13. The connecting parts 13 are connected to the diagonal rods 9 by bolts 12.

[0063] See Figures 4-5 The calculation steps for the road widening structure include:

[0064] The bearing capacity of the FRP component flange plate 10 and plate rib 11 is calculated based on the basic combination of earth pressure, self-weight and vehicle load of the original pavement 1, original base course 2 and widened pavement 4 and widened base course 5.

[0065] The deformation of the FRP component flange plate 10 is calculated based on the quasi-permanent combination and frequent combination of earth pressure, self-weight and vehicle load of the original pavement 1, original base course 2 and widened pavement 4 and widened base course 5.

[0066] Based on the deformation difference between the left flange 81 and the right flange 82 of the FRP component, the settlement difference between the original road surface 1 and the widened road surface 4, and between the original base course 2 and the widened base course 5 is verified.

[0067] See Figures 4-5 The load-bearing capacity calculation formulas for the FRP component flange 10 and the plate rib 11 are as follows:

[0068] ;

[0069] In the formula: This indicates the load-bearing capacity of the FRP component flange 10; This represents the basic combination of earth pressure, self-weight, and vehicle load acting on the flange 10 of the FRP component. This represents the basic combination of earth pressure and self-weight acting on the plate rib 11 of the FRP component;

[0070] The formula for calculating the load-bearing capacity of the FRP component flange 10 is as follows:

[0071] ;

[0072] In the formula: This indicates the load-bearing capacity of the FRP component flange 10; t represents the ultimate tensile strength of FRP; t represents the thickness of the root of the flange plate 10 or rib 11 of the FRP component; l represents the length of the flange plate 10 or rib 11 of the FRP component along the splicing direction 14.

[0073] The calculation formula for the basic combination of earth pressure, self-weight, and vehicle load acting on the flange 10 of the FRP component is as follows:

[0074] ;

[0075] In the formula: This represents the basic combination of earth pressure, self-weight, and vehicle load acting on the flange 10 of the FRP component. This represents the basic combination of earth pressure, self-weight, and vehicle load on the left flange 81 of the FRP component. This represents the basic combination of earth pressure, self-weight, and vehicle load on the right flange 82 of the FRP component.

[0076] The calculation formulas for the basic combination of earth pressure, self-weight, and vehicle load on the left flange 81 of the FRP component are as follows:

[0077] ;

[0078] In the formula: This represents the basic combination of earth pressure, self-weight, and vehicle load on the left flange 81 of the FRP component. A basic combination function representing earth pressure, self-weight, and vehicle load; This indicates the earth pressure acting on the left flange 81 of the FRP component, calculated based on the earth pressure of the original pavement 1 or the original base course 2 within the 45-degree line 15 at the end of the left flange 81 of the FRP component. This indicates the soil self-weight acting on the left flange 81 of the FRP component, calculated based on the soil self-weight of the original road surface 1 or the original base course 2 within the width range of the left flange 81 of the FRP component; This indicates the lane load acting on the original road surface 1;

[0079] The calculation formulas for the basic combination of earth pressure, self-weight, and vehicle load on the right flange 82 of the FRP component are as follows:

[0080] ;

[0081] In the formula: This represents the basic combination of earth pressure, self-weight, and vehicle load on the right flange 82 of the FRP component. A basic combination function representing earth pressure, self-weight, and vehicle load; This indicates the earth pressure acting on the right flange 82 of the FRP component, calculated based on the earth pressure within the 45-degree line 15 at the end of the right flange 82 of the FRP component when widening the pavement 4 or the base course 5. This indicates the self-weight of the soil acting on the right flange 82 of the FRP component, calculated based on the self-weight of the soil used to widen the pavement 4 or the base course 5 within the width range of the right flange 82 of the FRP component. This indicates the lane load acting on the 4th lane of the widened road surface;

[0082] The calculation formula for the basic combination of earth pressure and self-weight acting on the FRP component rib 11 is as follows:

[0083] ;

[0084] In the formula: This represents the basic combination of earth pressure and self-weight acting on the plate rib 11 of the FRP component; A basic combination function representing earth pressure and self-weight; This indicates the earth pressure of the original road surface 1 or the original base course 2 acting on the FRP component plate rib 11, calculated according to the earth pressure of the original road surface 1 or the original base course 2 within the range to the right of the FRP component plate rib 11. This indicates the soil self-weight acting on the FRP component plate rib 11, calculated based on the soil self-weight of the original pavement 1 or original base course 2 on the FRP component plate rib 11.

[0085] In this optional embodiment, the deformation calculation formula for the FRP component flange 10 is as follows:

[0086] ;

[0087] In the formula: This indicates the amount of deformation of the flange 10 of the FRP component; This indicates the amount of deformation of the left flange 81 of the FRP component; This indicates the amount of deformation on the right flange 82 of the FRP component;

[0088] The formula for calculating the deformation of the left flange 81 of the FRP component is as follows:

[0089] ;

[0090] In the formula: This indicates the amount of deformation of the left flange 81 of the FRP component; This represents the quasi-permanent and frequent combinations of soil pressure, self-weight, temperature, and vehicle load on the original road surface 1 and original base course 2 on the left flange 81 of the FRP component. E represents the quasi-permanent and frequent combinations of soil pressure, self-weight, temperature, and vehicle load on the widened pavement 4 and widened base course 5 on the left flange 81 of the FRP component; E represents the elastic modulus of FRP. Represents the moment of inertia, where The calculation formula is as follows:

[0091] ;

[0092] In the formula: The value represents the moment of inertia; l represents the length of the FRP component flange (10) or rib (11) along the splicing direction (14); t represents the thickness at the root of the FRP component flange (10) or rib (11);

[0093] The formula for calculating the deformation of the right flange 82 of the FRP component is as follows:

[0094] ;

[0095] In the formula: This indicates the amount of deformation on the right flange 82 of the FRP component; This represents the quasi-permanent and frequent combinations of earth pressure, self-weight, temperature, and vehicle load on the widened road surface 4 on the right flange 82 of the FRP component. E represents the quasi-permanent and frequent combinations of soil pressure, self-weight, temperature, and vehicle load on the base course 5 of the right flange 82 of the FRP component; E represents the elastic modulus of the FRP. It represents the moment of inertia.

[0096] In this optional embodiment, the formula for calculating the deformation difference between the left flange 81 and the right flange 82 of the FRP component is as follows:

[0097] ;

[0098] In the formula: This indicates the deformation difference between the left flange 81 and the right flange 82 of the FRP component; This indicates the amount of deformation of the left flange 81 of the FRP component; This indicates the amount of deformation on the right flange 82 of the FRP component.

[0099] In this optional embodiment, the formula for calculating the settlement difference between the original road surface 1 and the widened road surface 4, and between the original base course 2 and the widened base course 5, is as follows:

[0100] ;

[0101] In the formula: This indicates the settlement difference between the original pavement 1 and the widened pavement 4, and between the original base course 2 and the widened base course 5. This indicates the deformation difference between the left flange 81 and the right flange 82 of the FRP component; This indicates the allowable value for differential settlement. =5mm.

[0102] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A road widening structure, characterized in that, The system includes a widened road surface (4), a widened base course (5), and an anti-settlement device (6). The widened road surface (4) and the widened base course (5) are respectively connected to the original road surface (1) and the original base course (2). The original road surface (1) and the widened road surface (4) are laid on top of the original base course (2) and the widened base course (5). The original base course (2) and the widened base course (5) are laid on top of the original base course (3). The anti-settlement device (6) is provided at the joint (8) of the original road surface (1), the widened road surface (4), the original base course (2), and the widened base course (5).

2. The road widening structure according to claim 1, characterized in that, The anti-settlement device (6) is an angled T-shaped FRP component (7), and the angled T-shaped FRP component (7) is a pultruded profile.

3. The road widening structure according to claim 2, characterized in that, The tilted T-shaped FRP component (7) includes a plurality of diagonal bars (9) spaced apart along the length direction (14) of the tilted T-shaped FRP component (7), and the two ends of the diagonal bars (9) are respectively connected to the flange plate (10) and the plate rib (11).

4. A road widening structure according to claim 3, characterized in that, Both the flange plate (10) and the plate rib (11) are provided with connecting parts (13) at the connection ends with the diagonal bar (9), and the connecting parts (13) are connected to the diagonal bar (9) by bolts (12).

5. A road widening structure according to claim 4, characterized in that, The calculation steps for the road widening structure include: The bearing capacity of the flange plate (10) and rib plate (11) of the FRP component is calculated based on the basic combination of earth pressure, self-weight and vehicle load of the original pavement (1), original base course (2) and widened pavement (4) and widened base course (5); The deformation of the flange plate (10) of the FRP component is calculated based on the quasi-permanent combination and frequent combination of earth pressure, self-weight and vehicle load of the original pavement (1), original base course (2) and widened pavement (4) and widened base course (5); Based on the deformation difference between the left flange (81) and the right flange (82) of the FRP component, the settlement difference between the original road surface (1) and the widened road surface (4) and between the original base course (2) and the widened base course (5) is verified.

6. A road widening structure according to claim 5, characterized in that, The formulas for calculating the load-bearing capacity of the FRP component flange (10) and the plate rib (11) are as follows: ； In the formula: This indicates the load-bearing capacity of the FRP component flange (10); This represents the basic combination of earth pressure, self-weight, and vehicle load acting on the flange (10) of the FRP component; This represents the basic combination of earth pressure and self-weight acting on the plate rib (11) of the FRP component; The formula for calculating the load-bearing capacity of the FRP component flange (10) is as follows: ； In the formula: This indicates the load-bearing capacity of the FRP component flange (10); t represents the ultimate tensile strength of FRP; t represents the thickness at the root of the flange plate (10) or rib (11) of the FRP component; l represents the length of the flange plate (10) or rib (11) of the FRP component along the splicing direction (14); The calculation formula for the basic combination of earth pressure, self-weight, and vehicle load acting on the flange plate (10) of the FRP component is as follows: ； In the formula: This represents the basic combination of earth pressure, self-weight, and vehicle load acting on the flange (10) of the FRP component; This represents the basic combination of earth pressure, self-weight, and vehicle load on the left flange (81) of the FRP component; This represents the basic combination of earth pressure, self-weight, and vehicle load on the right flange (82) of the FRP component; The calculation formulas for the basic combination of earth pressure, self-weight, and vehicle load on the left flange (81) of the FRP component are as follows: ； In the formula: This represents the basic combination of earth pressure, self-weight, and vehicle load on the left flange (81) of the FRP component; A basic combination function representing earth pressure, self-weight, and vehicle load; The earth pressure acting on the left flange (81) of the FRP component is calculated based on the earth pressure of the original pavement (1) or the original base course (2) within the 45-degree line (15) at the end of the left flange (81) of the FRP component. The soil self-weight acting on the left flange (81) of the FRP component is calculated based on the soil self-weight of the original road surface (1) or the original base course (2) within the width range of the left flange (81) of the FRP component. This indicates the lane load acting on the original road surface (1); The calculation formulas for the basic combination of earth pressure, self-weight, and vehicle load on the right flange (82) of the FRP component are as follows: ； In the formula: This represents the basic combination of earth pressure, self-weight, and vehicle load on the right flange (82) of the FRP component; A basic combination function representing earth pressure, self-weight, and vehicle load; The earth pressure acting on the right flange (82) of the FRP component is calculated based on the earth pressure of the widened pavement (4) or widened base course (5) within the 45-degree line (15) at the end of the right flange (82) of the FRP component. The soil self-weight acting on the right flange (82) of the FRP component is calculated based on the soil self-weight of the widened pavement (4) or widened base course (5) within the width range of the right flange (82) of the FRP component; This indicates the lane load acting on the widened road surface (4); The calculation formula for the basic combination of earth pressure and self-weight acting on the FRP component plate rib (11) is as follows: ； In the formula: This represents the basic combination of earth pressure and self-weight acting on the plate rib (11) of the FRP component; A basic combination function representing earth pressure and self-weight; The earth pressure of the original road surface (1) or the original base course (2) acting on the FRP component plate rib (11) is calculated according to the earth pressure of the original road surface (1) or the original base course (2) within the range to the right of the FRP component plate rib (11); The soil self-weight acting on the FRP component plate rib (11) is calculated based on the soil self-weight of the original pavement (1) or original base course (2) on the FRP component plate rib (11).

7. A road widening structure according to claim 6, characterized in that, The deformation calculation formula for the flange plate (10) of the FRP component is as follows: ； In the formula: This indicates the amount of deformation of the flange plate (10) of the FRP component; This indicates the amount of deformation of the left flange (81) of the FRP component; This indicates the amount of deformation of the right flange (82) of the FRP component; The formula for calculating the deformation of the left flange (81) of the FRP component is as follows: ； In the formula: This indicates the amount of deformation of the left flange (81) of the FRP component; The quasi-permanent and frequent combinations of soil pressure, self-weight, temperature and vehicle load on the original road surface (1) and original base course (2) on the left flange (81) of the FRP component are represented. E represents the quasi-permanent and frequent combinations of soil pressure, self-weight, temperature, and vehicle load on the widened pavement (4) and widened base course (5) on the left flange (81) of the FRP component; E represents the elastic modulus of FRP. Represents the moment of inertia, where The calculation formula is as follows: ； In the formula: The value represents the moment of inertia; l represents the length of the FRP component flange (10) or rib (11) along the splicing direction (14); t represents the thickness at the root of the FRP component flange (10) or rib (11); The formula for calculating the deformation of the right flange (82) of the FRP component is as follows: ； In the formula: This indicates the amount of deformation of the right flange (82) of the FRP component; The quasi-permanent and frequent combinations of earth pressure, self-weight, temperature and vehicle load on the widened road surface (4) on the right flange (82) of the FRP component are represented. E represents the quasi-permanent and frequent combinations of soil pressure, self-weight, temperature, and vehicle load on the widened base course (5) on the right flange (82) of the FRP component; E represents the elastic modulus of FRP. It represents the moment of inertia.

8. A road widening structure according to claim 7, characterized in that, The formula for calculating the deformation difference between the left flange (81) and the right flange (82) of the FRP component is as follows: ； In the formula: This represents the deformation difference between the left flange (81) and the right flange (82) of the FRP component; This indicates the amount of deformation of the left flange (81) of the FRP component; This indicates the amount of deformation of the right flange (82) of the FRP component.

9. A road widening structure according to claim 8, characterized in that, The formulas for calculating the settlement difference between the original road surface (1) and the widened road surface (4), and between the original base course (2) and the widened base course (5) are as follows: ； In the formula: This indicates the settlement difference between the original pavement (1) and the widened pavement (4), and between the original base course (2) and the widened base course (5); This represents the deformation difference between the left flange (81) and the right flange (82) of the FRP component; This indicates the allowable value for differential settlement. =5mm.

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