Fabricated road shoulder widening structure and construction method

Abstract

The invention relates to the technical field of road construction, aims to solve the problem of how to improve the stability of a road shoulder widening structure, and provides a fabricated road shoulder widening structure and a construction method. The assembly type road shoulder widening structure comprises a first vertical plate, a first transverse plate, a second vertical plate and a second transverse plate. The first vertical plate comprises a first plate part and a first connecting part. The first transverse plate comprises a first horizontal part and a first tenon. The second vertical plate comprises a second plate part, a second tenon and a second connecting part. The second transverse plate comprises a second horizontal part and a third tenon. According to the assembly type road shoulder widening structure, a first vertical plate, a first transverse plate, a second vertical plate and a second transverse plate are sequentially assembled and connected, a first connecting part convexly extends into the ground to be fixed to the ground, and a second connecting part convexly extends into the surface of a side slope to be fixed to the side slope; and the first transverse plate and the second transverse plate are in contact with the side slope to increase the friction force in the horizontal direction so as to resist the soil pressure in the horizontal direction, so that the effect of improving the overall stability of the assembly type road shoulder widening structure is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of road construction, and in particular to an assembled shoulder widening structure and a construction method. Background Art

[0002] The part on both sides of the roadbed that is not covered by the roadbed is the shoulder. A good shoulder is conducive to the stability of the roadbed and the integrity of the roadbed. The shoulder provides necessary space for equipment such as contact network columns, sound barriers, and cable troughs. The shoulder is also a passage for engineering maintenance personnel. After the line is put into operation, the roadbed sinks, erodes, or scours, or due to construction errors, engineering maintenance needs, etc., the width of the existing shoulder is insufficient. It is necessary to widen and regulate the section of the existing line where the shoulder width is insufficient.

[0003] In the prior art, shoulder widening is usually done by installing shoulder ballast retaining walls and widening the embankment slope fill. However, widening the embankment slope fill is prone to new land acquisition, and the ballast retaining walls are prone to external squeezing, resulting in an unstable overall structure of the widened shoulder. How to solve the above technical problems is what the technicians in this field need to consider. Summary of the invention

[0004] The present application provides an assembled shoulder widening structure and a construction method to solve the problem of how to improve the stability of the shoulder widening structure.

[0005] An embodiment of the present application provides an assembled shoulder widening structure, comprising a first vertical plate, a first horizontal plate, a second vertical plate, and a second horizontal plate. The first vertical plate comprises a first plate portion and a first connecting portion, the first plate portion extends in a vertical direction, the top surface of the first plate portion is recessed to form a first groove, the bottom surface of the first plate portion is integrally connected to the first connecting portion, the first connecting portion protrudes below the ground so that the first plate portion is fixed to the ground. The first horizontal plate comprises a first horizontal portion and a first tenon, one end of the first horizontal portion is integrally connected to the first tenon and the other end extends in a horizontal direction, a second groove is provided at the end of the extension of the first horizontal portion, the first tenon protrudes into the first groove in a vertical direction so that the first horizontal portion is connected to the first plate portion. The second vertical plate includes a second plate portion, a second tenon and a second connecting portion, the second plate portion extends in the vertical direction, the top surface of the second plate portion is recessed to form a third groove, the bottom surface of the second plate portion is integrally connected with the second connecting portion, the second connecting portion protrudes below the surface of the slope so that the second plate portion is fixed to the slope, the second tenon is integrally connected with the side surface of the second plate portion, the second tenon protrudes into the second groove along the horizontal direction so that the second plate portion is connected to the first horizontal portion. The second transverse plate includes a second horizontal portion and a third tenon, one end of the second horizontal portion is integrally connected with the third tenon and the other end extends in the horizontal direction, the third tenon protrudes into the third groove along the vertical direction so that the second horizontal portion is connected to the second plate portion, and the second horizontal portion is used to widen the existing shoulder.

[0006] Compared with the prior art, the prefabricated shoulder widening structure is assembled and connected in sequence by a first vertical plate, a first horizontal plate, a second vertical plate and a second horizontal plate, which is conducive to standardized production. The prefabricated shoulder widening structure reduces the excavation of the roadbed and the requisition of new land, thereby improving construction efficiency. The first connecting portion protrudes below the ground so that the first plate portion is fixed to the ground, and the second connecting portion protrudes below the surface of the slope so that the second plate portion is fixed to the slope. The first horizontal plate and the second horizontal plate are used to contact the slope to increase friction along the horizontal direction to resist the soil pressure in the horizontal direction, so as to achieve the effect of improving the overall stability of the prefabricated shoulder widening structure.

[0007] In a possible embodiment, the first connecting portion includes a first transverse flange, a second transverse flange and a first vertical flange, the first transverse flange and the second transverse flange are arranged back to back on the first plate portion, the first transverse flange and the second transverse flange protrude in a horizontal direction, and the first vertical flange protrudes in a vertical direction.

[0008] In this embodiment, the prefabricated shoulder widening structure includes a first lateral flange, a second lateral flange and a first vertical flange through the first connecting part of the first vertical plate. The first lateral flange and the second lateral flange extend into the ground in a horizontal direction, so that the first lateral flange and the second lateral flange jointly provide support for the first plate portion to reduce the rollover and tipping of the first plate portion. The first vertical flange is inserted into the ground in a vertical direction to fix the first vertical plate to the ground, so as to achieve the effect of improving the overall stability of the prefabricated shoulder widening structure.

[0009] In a possible embodiment, the second connecting portion includes a third transverse flange and a second vertical flange, the third transverse flange and the second tenon are arranged back to back on the second plate portion, the third transverse flange protrudes in the horizontal direction, and the second vertical flange protrudes in the vertical direction.

[0010] In this embodiment, the prefabricated shoulder widening structure includes a third transverse flange and a second vertical flange through the second connecting portion of the second vertical plate. The third transverse flange extends into the slope along the horizontal direction, and the second tenon extends into the first groove along the horizontal direction, so that the third transverse flange and the second tenon jointly support the second plate portion to reduce the rollover and tipping of the second plate portion. The second vertical flange is inserted into the slope along the vertical direction to fix the second vertical plate to the slope, thereby improving the overall stability of the prefabricated shoulder widening structure.

[0011] In a possible implementation, the first vertical plate, the first horizontal plate and the side slope form a first cavity, the second vertical plate, the second horizontal plate and the side slope form a second cavity, and the first cavity and the second cavity are filled with foam lightweight soil.

[0012] In this embodiment, the first cavity and the second cavity are filled with foam lightweight soil, thereby increasing the friction force exerted on the first cross plate and the second cross plate in the horizontal direction to resist the soil pressure in the horizontal direction, thereby improving the overall stability of the prefabricated shoulder widening structure.

[0013] In a possible implementation manner, the assembled shoulder widening structure further includes drainage holes, which are respectively provided on the first vertical plate and the second vertical plate, and are used to drain water in the first cavity and the second cavity.

[0014] In this embodiment, the drainage holes are used to drain water from the first cavity and the second cavity to reduce the water pressure in the horizontal direction on the prefabricated shoulder widening structure, thereby improving the overall stability of the prefabricated shoulder widening structure.

[0015] In a possible implementation manner, the diameter of the drainage hole ranges from 40 mm to 80 mm.

[0016] In a possible embodiment, the height h of the first plate portion of the first vertical plate ranges from 300 mm to 500 mm, the width b of the first plate portion of the first vertical plate ranges from 200 mm to 400 mm, the thickness c of the first plate portion of the first vertical plate ranges not less than 200 mm, and the size of the second plate portion of the second vertical plate is set with reference to the size of the first plate portion of the first vertical plate.

[0017] In a possible embodiment, the length of the first horizontal portion of the first transverse plate is the same as the height of the first plate portion of the first vertical plate, the width of the first horizontal portion of the first transverse plate is the same as the width of the first plate portion of the first vertical plate, and the thickness of the first horizontal portion of the first transverse plate is the same as the thickness of the first plate portion of the first vertical plate.

[0018] In a possible implementation manner, the width of the groove bottom surface of the first groove is c / 3, and the widths of the groove bottom surface of the first groove, the groove bottom surface of the second groove, and the groove bottom surface of the third groove are the same.

[0019] An embodiment of the present application also provides a construction method for an assembled shoulder widening structure, comprising the following construction steps: providing an assembled shoulder widening structure, and assembling the first vertical plate, the first horizontal plate, the second vertical plate and the second horizontal plate layer by layer from the toe of the slope to the shoulder on a slope where shoulder widening is required, the first connecting portion of the first vertical plate being buried in the ground at a depth of not less than 100 mm, backfilling foam lightweight soil between the first plate portion of the first vertical plate and the slope, installing the first tenon of the first horizontal plate to the first groove of the first vertical plate, and the first horizontal portion of the first horizontal plate extending into the slope, installing the second tenon of the second vertical plate to the second groove of the first horizontal plate, and the second connecting portion of the second vertical plate extending into the slope, backfilling foam lightweight soil between the second plate portion of the second vertical plate and the slope, installing the third tenon of the second horizontal plate to the third groove of the second vertical plate, and the second horizontal portion of the second horizontal plate extending into the existing shoulder by 100 mm, and the second horizontal portion and the existing shoulder being connected to form a new shoulder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A three-dimensional schematic diagram of an assembled shoulder widening structure according to an embodiment of the present application;

[0022] Figure 2 for Figure 1 A three-dimensional schematic diagram of a first vertical plate of an assembled shoulder widening structure;

[0023] Figure 3 for Figure 1 A three-dimensional schematic diagram of a first transverse plate of an assembled shoulder widening structure;

[0024] Figure 4 for Figure 1 A three-dimensional schematic diagram of a second vertical plate of the assembled shoulder widening structure;

[0025] Figure 5 for Figure 1 A three-dimensional schematic diagram of a second transverse plate of the assembled shoulder widening structure;

[0026] Figure 6 for Figure 1 Structural schematic diagram of the construction of the prefabricated shoulder widening structure.

[0027] Description of main component symbols:

[0028] 1. Assembled shoulder widening structure; 11. First vertical plate; 111. First plate portion; 112. First connecting portion; 113. First transverse flange; 114. Second transverse flange; 115. First vertical flange; 116. First groove; 117. First cavity; 12. First transverse plate; 121. First horizontal portion; 122. First tenon; 123. Second groove; 13. Second vertical plate; 131. Second plate portion; 132. Second tenon; 133. Second connecting portion; 134. Third transverse flange; 135. Second vertical flange; 136. Third groove; 137. Second cavity; 14. Second transverse plate; 141. Second horizontal portion; 142. Third tenon; 15. Drainage hole; 16. Vertical direction; 17. Horizontal direction; 2. Ground; 3. Slope; 31. Steps; 4. Foam lightweight soil. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0030] Some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0031] Example

[0032] See also Figures 1 to 6As shown, this embodiment provides an assembled shoulder widening structure 1, comprising a first vertical plate 11, a first horizontal plate 12, a second vertical plate 13 and a second horizontal plate 14. The first vertical plate 11 comprises a first plate portion 111 and a first connecting portion 112, the first plate portion 111 extends along a vertical direction 16, the top surface of the first plate portion 111 is recessed to form a first groove 116, the bottom surface of the first plate portion 111 is integrally connected with the first connecting portion 112, the first connecting portion 112 protrudes below the ground 2 so that the first plate portion 111 is fixed to the ground 2. The first horizontal plate 12 comprises a first horizontal portion 121 and a first tenon 122, one end of the first horizontal portion 121 is integrally connected with the first tenon 122, and the other end extends along a horizontal direction 17, a second groove 123 is provided at the extended end of the first horizontal portion 121, the first tenon 122 protrudes into the first groove 116 along the vertical direction 16 so that the first horizontal portion 121 is connected to the first plate portion 111. The second vertical plate 13 includes a second plate portion 131, a second tenon 132 and a second connecting portion 133. The second plate portion 131 extends along the vertical direction 16. The top surface of the second plate portion 131 is recessed to form a third groove 136. The bottom surface of the second plate portion 131 is integrally connected with the second connecting portion 133. The second connecting portion 133 protrudes below the surface of the slope 3 so that the second plate portion 131 is fixed to the slope 3. The second tenon 132 is integrally connected with the side surface of the second plate portion 131. The second tenon 132 protrudes into the second groove 123 along the horizontal direction 17 so that the second plate portion 131 is connected to the first horizontal portion 121. The second cross plate 14 includes a second horizontal portion 141 and a third tenon 142. One end of the second horizontal portion 141 is integrally connected to the third tenon 142, and the other end extends along the horizontal direction 17. The third tenon 142 protrudes into the third groove 136 along the vertical direction 16 so that the second horizontal portion 141 is connected to the second plate portion 131. The second horizontal portion 141 is used to widen the existing shoulder.

[0033] In this embodiment, the prefabricated shoulder widening structure 1 is assembled and connected in sequence by a first vertical plate 11, a first horizontal plate 12, a second vertical plate 13 and a second horizontal plate 14, which is conducive to standardized production, and the prefabricated shoulder widening structure 1 is conducive to reducing the excavation of the roadbed and the requisition of new land, thereby improving construction efficiency; the first connecting portion 112 protrudes below the ground 2 so that the first plate portion 111 is fixed to the ground 2, the second connecting portion 133 protrudes below the surface of the slope 3 so that the second plate portion 131 is fixed to the slope 3, and the first horizontal plate 12 and the second horizontal plate 14 are used to contact the slope 3 to increase the friction along the horizontal direction 17 to resist the soil pressure in the horizontal direction 17, thereby improving the overall stability of the prefabricated shoulder widening structure 1.

[0034] In a possible embodiment, the first connecting portion 112 includes a first lateral flange 113, a second lateral flange 114 and a first vertical flange 115. The first lateral flange 113 and the second lateral flange 114 are arranged back to back on the first plate portion 111. The first lateral flange 113 and the second lateral flange 114 protrude along the horizontal direction 17, and the first vertical flange 115 protrudes along the vertical direction 16.

[0035] In this embodiment, the prefabricated shoulder widening structure 1 includes a first lateral flange 113, a second lateral flange 114 and a first vertical flange 115 through the first connecting portion 112 of the first vertical plate 11. The first lateral flange 113 and the second lateral flange 114 extend into the ground 2 along the horizontal direction 17, so that the first lateral flange 113 and the second lateral flange 114 jointly provide support for the first plate portion 111 to reduce the tipping over of the first plate portion 111. The first vertical flange 115 is inserted into the ground 2 along the vertical direction 16 to fix the first vertical plate 11 to the ground 2, thereby improving the overall stability of the prefabricated shoulder widening structure 1.

[0036] In a possible embodiment, the second connecting portion 133 includes a third transverse flange 134 and a second vertical flange 135. The third transverse flange 134 and the second tenon 132 are arranged back to back on the second plate portion 131. The third transverse flange 134 protrudes along the horizontal direction 17, and the second vertical flange 135 protrudes along the vertical direction 16.

[0037] In this embodiment, the prefabricated shoulder widening structure 1 includes a third lateral flange 134 and a second vertical flange 135 through the second connecting portion 133 of the second vertical plate 13. The third lateral flange 134 extends into the slope 3 along the horizontal direction 17, and the second tenon 132 extends into the first groove 116 along the horizontal direction 17, so that the third lateral flange 134 and the second tenon 132 jointly support the second plate portion 131 to reduce the rollover of the second plate portion 131, and the second vertical flange 135 is inserted into the slope 3 along the vertical direction 16 to fix the second vertical plate 13 to the slope 3, thereby improving the overall stability of the prefabricated shoulder widening structure 1.

[0038] In a possible implementation, the first vertical plate 11, the first horizontal plate 12 and the slope 3 enclose a first cavity 117, the second vertical plate 13, the second horizontal plate 14 and the slope 3 enclose a second cavity 137, and the first cavity 117 and the second cavity 137 are filled with foam lightweight soil 4.

[0039] In this embodiment, the first cavity 117 and the second cavity 137 are filled with foam lightweight soil 4, thereby increasing the friction force exerted on the first transverse plate 12 and the second transverse plate 14 along the horizontal direction 17 to resist the soil pressure in the horizontal direction 17, thereby improving the overall stability of the prefabricated shoulder widening structure 1.

[0040] In a possible implementation, the assembled shoulder widening structure 1 further includes a drainage hole 15 , which is respectively provided on the first vertical plate 11 and the second vertical plate 13 , and is used to drain water in the first cavity 117 and the second cavity 137 .

[0041] In this embodiment, the foamed lightweight soil 4 is a water-permeable material. The drainage hole 15 is used to drain the water in the first cavity 117 and the second cavity 137 to reduce the water pressure along the horizontal direction 17 on the assembled shoulder widening structure 1, thereby improving the overall stability of the assembled shoulder widening structure 1.

[0042] In a possible embodiment, the height h of the first plate portion 111 of the first vertical plate 11 ranges from 300 mm to 500 mm, the width b of the first plate portion 111 of the first vertical plate 11 ranges from 200 mm to 400 mm, the thickness c of the first plate portion 111 of the first vertical plate 11 ranges from not less than 200 mm, and the size of the second plate portion 131 of the second vertical plate 13 is set with reference to the size of the first plate portion 111 of the first vertical plate 11.

[0043] In this embodiment, the sizes of the first vertical plate 11, the first horizontal plate 12, the second vertical plate 13 and the second horizontal plate 14 are flexibly adjusted according to actual conditions, which is conducive to the industrialized and standardized production of the first vertical plate 11, the first horizontal plate 12, the second vertical plate 13 and the second horizontal plate 14, improves the quality and precision of the components, and reduces material waste and loss during the construction process.

[0044] In a possible implementation manner, the diameter of the drainage hole 15 ranges from 40 mm to 80 mm.

[0045] In this embodiment, drainage holes 15 are arranged on the first vertical plate 11 and the second vertical plate 13, respectively. The drainage holes 15 are between 40 mm and 80 mm, and the specific size can be flexibly adjusted according to actual conditions. Optionally, a drainage pipe is arranged in the drainage hole 15, and the drainage pipe extends and is inserted into the original slope 3 for drainage. The drainage pipe is provided with an anti-filter layer, thereby reducing the leakage of the foam lightweight soil 4 or the soil of the slope 3 due to water scouring.

[0046] In a possible embodiment, the length of the first horizontal portion 121 of the first transverse plate 12 is the same as the height of the first plate portion 111 of the first vertical plate 11, the width of the first horizontal portion 121 of the first transverse plate 12 is the same as the width of the first plate portion 111 of the first vertical plate 11, and the thickness of the first horizontal portion 121 of the first transverse plate 12 is the same as the thickness of the first plate portion 111 of the first vertical plate 11.

[0047] In this embodiment, the shapes and sizes of the first vertical plate 11, the first horizontal plate 12, the second vertical plate 13 and the second horizontal plate 14 are standardized, and the assembled shoulder widening structure 1 is easy to maintain and replace, reducing the difficulty and cost of subsequent maintenance.

[0048] In a possible implementation manner, the width of the groove bottom surface of the first groove 116 is c / 3, and the groove bottom surfaces of the first groove 116, the second groove 123, and the groove bottom surfaces of the third groove 136 are the same in width.

[0049] In this embodiment, the cross-sectional shape of the first groove 116 of the first vertical plate 11 and the cross-sectional shape of the third groove 136 of the second vertical plate 13 are concave, and the cross-sectional shape of the second groove 123 of the first horizontal plate 12 is L-shaped. The width of the bottom surface of the first groove 116, the second groove 123 and the third groove 136 along the vertical direction 16 is c / 3, which is conducive to overlapping assembly.

[0050] The embodiment of the present application also provides a construction method of an assembled shoulder widening structure, comprising the following construction steps: on a slope 3 where shoulder widening is required, a first vertical plate 11, a first horizontal plate 12, a second vertical plate 13 and a second horizontal plate 14 are assembled layer by layer from the slope foot to the shoulder direction, a first connecting portion 112 of the first vertical plate 11 is buried in the ground 2 to a depth of not less than 100 mm, a foam lightweight soil 4 is backfilled between the first plate portion 111 of the first vertical plate 11 and the slope 3, a first tenon 122 of the first horizontal plate 12 is installed in the first groove 116 of the first vertical plate 11, and a first horizontal plate 14 is assembled in the first vertical plate 11. The first horizontal portion 121 of the plate 12 extends into the slope 3, the second tenon 132 of the second vertical plate 13 is installed in the second groove 123 of the first horizontal plate 12, the second connecting portion 133 of the second vertical plate 13 extends into the slope 3, the foam lightweight soil 4 is backfilled between the second plate portion 131 of the second vertical plate 13 and the slope 3, the third tenon 142 of the second horizontal plate 14 is installed in the third groove 136 of the second vertical plate 13, the second horizontal portion 141 of the second horizontal plate 14 extends into the existing shoulder 100 mm, and the second horizontal portion 141 is connected to the existing shoulder to form a new shoulder.

[0051] In this embodiment, a step 31 is dug on the surface of the slope 3 where the shoulder needs to be widened, and the shoulder is widened and protected by assembling layer by layer from the foot of the slope to the shoulder. The first vertical plate 11 is arranged near the foot of the slope according to the site conditions, and the first connecting portion 112 of the first vertical plate 11 is buried at a depth of not less than 0.1m, so that the first connecting portion 112 is completely buried below the ground 2. After the first vertical plate 11 is arranged, the foam lightweight soil 4 is backfilled from the first plate portion 111 to the slope 3 to the same height as the first plate portion 111. The first horizontal plate 12 is installed to the first vertical plate 11, the first groove 116 and the first tenon 122 are overlapped, and the first horizontal portion 121 of the first horizontal plate 12 extends into the original slope 3. The second vertical plate 13 is installed on the first horizontal plate 12, the second tenon 132 and the second groove 123 are overlapped, and the second connection part 133 of the second vertical plate 13 at the overlapped part is inserted into the slope 3; after the second vertical plate 13 is arranged, the second plate part 131 of the second vertical plate 13 is backfilled with foam lightweight soil 4 to the slope 3, and the backfilling is consistent with the height of the second plate part 131. The second horizontal plate 14 is installed on the second vertical plate 13, the third tenon 142 and the third groove 136 are overlapped, and the second horizontal part 141 of the second horizontal plate 14 extends into the original shoulder by 0.1m to form a new shoulder.

[0052] The assembled shoulder widening structure 1 provided in this embodiment penetrates deep into the shoulder through the first horizontal plate 12 and the second horizontal plate 14. The soil below the first horizontal plate 12 and the second horizontal plate 14 generates frictional resistance to resist the horizontal soil pressure of the roadbed soil acting on the first vertical plate 11 and the second vertical plate 13, so as to maintain the soil stability of the roadbed slope 3 and improve the overall stability of the shoulder after widening.

[0053] During the construction of the prefabricated shoulder widening structure 1, the disturbance to the existing roadbed is small, no overall excavation is required, the new land requisition is reduced, and the number of masonry works is greatly reduced; the use of prefabricated structures for on-site splicing construction reduces energy consumption during the construction process, improves on-site construction efficiency, and fully reflects the green and low-carbon construction goals. The industrialized and standardized production methods of the first vertical plate 11, the first horizontal plate 12, the second vertical plate 13, and the second horizontal plate 14 improve the quality and precision of the components and reduce material waste and loss during the construction process. At the same time, due to the standardization of the components, the prefabricated shoulder also has better maintainability and replaceability, reducing the difficulty and cost of later maintenance. The prefabricated shoulder generates less construction waste during the construction process, reducing the burden on the environment. In addition, the repair and replacement of the prefabricated shoulder is also faster and more environmentally friendly, which can achieve the green ecological and recyclable construction goals of rapid assembly and disassembly, recycling, zero emissions, and zero solid waste. The unit-shaped component composed of the assembled first vertical plate 11, the first horizontal plate 12, the second vertical plate 13 and the second horizontal plate 14 reduces the time required for cast-in-place, shortens the construction period and reduces the construction cost; the long size of the prefabricated plate is highly flexible, and the specific sizes of the first vertical plate 11, the first horizontal plate 12, the second vertical plate 13 and the second horizontal plate 14 can be prefabricated according to the actual situation on site, which is suitable for environments with limited construction conditions.

[0054] The first cavity 117 and the second cavity 137 are backfilled with foamed lightweight soil 4 to reduce the force on the shoulder structure. The foamed lightweight soil 4 contains a large number of tiny bubbles and has a small bulk density. By adjusting the content of the cementitious material, its bulk density can be adjusted to 5-15 kNm 3 It varies within a certain range and has significant advantages in reducing the deadweight of the structure and lowering the bearing pressure requirements of the foundation.

[0055] In summary, the assembled shoulder widening structure 1 and construction method provided in this embodiment realize a new type of shoulder widening assembly structure by sequentially assembling and connecting the first vertical plate 11, the first horizontal plate 12, the second vertical plate 13 and the second horizontal plate 14, which is convenient for production and construction from factory prefabrication to on-site assembly; the first vertical plate 11 and the second vertical plate 13 are provided with drainage holes, the assembled structure is arranged longitudinally along the line, and the water-permeable material is backfilled between the structure and the original slope 3, so that the drainage of the base bed is smooth. The assembled shoulder widening structure 1 and construction method provided in this embodiment can not only improve the overall stability of the roadbed, but also reduce the disturbance of the soil during construction, reduce the requisition of new land, shorten the construction period, and reduce the construction cost.

[0056] The above implementation modes are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred implementation modes, a person skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An assembled shoulder widening structure, characterized in that: include: A first vertical plate, comprising a first plate portion and a first connecting portion, wherein the first plate portion extends in a vertical direction, a top surface of the first plate portion is recessed to form a first groove, a bottom surface of the first plate portion is integrally connected to the first connecting portion, and the first connecting portion protrudes below the ground so that the first plate portion is fixed to the ground; A first transverse plate, comprising a first horizontal portion and a first tenon, wherein one end of the first horizontal portion is integrally connected to the first tenon and the other end extends in a horizontal direction, a second groove is provided at the end of the extension of the first horizontal portion, and the first tenon protrudes into the first groove in a vertical direction so that the first horizontal portion is connected to the first plate portion; The second vertical plate comprises a second plate portion, a second tenon and a second connecting portion, wherein the second plate portion extends in a vertical direction, the top surface of the second plate portion is recessed to form a third groove, the bottom surface of the second plate portion is integrally connected with the second connecting portion, the second connecting portion protrudes below the surface of the slope so that the second plate portion is fixed to the slope, the second tenon is integrally connected with a side surface of the second plate portion, and the second tenon protrudes into the second groove in a horizontal direction so that the second plate portion is connected to the first horizontal portion; The second transverse plate includes a second horizontal portion and a third tenon, wherein one end of the second horizontal portion is integrally connected to the third tenon and the other end extends in a horizontal direction, and the third tenon protrudes into the third groove in a vertical direction so that the second horizontal portion is connected to the second plate portion, and the second horizontal portion is used to widen the existing shoulder.

2. The assembled shoulder widening structure according to claim 1 is characterized in that: The first connecting portion includes a first transverse flange, a second transverse flange and a first vertical flange, the first transverse flange and the second transverse flange are arranged back to back on the first plate portion, the first transverse flange and the second transverse flange protrude in a horizontal direction, and the first vertical flange protrudes in a vertical direction.

3. The assembled shoulder widening structure according to claim 1 is characterized in that: The second connecting portion includes a third transverse flange and a second vertical flange. The third transverse flange and the second tenon are arranged on the second plate portion back to back. The third transverse flange protrudes along the horizontal direction, and the second vertical flange protrudes along the vertical direction.

4. The assembled shoulder widening structure according to claim 1 is characterized in that: The first vertical plate, the first horizontal plate and the side slope form a first cavity, the second vertical plate, the second horizontal plate and the side slope form a second cavity, and the first cavity and the second cavity are filled with foam lightweight soil.

5. The assembled shoulder widening structure according to claim 4 is characterized in that: The assembled shoulder widening structure further includes drainage holes, which are respectively arranged on the first vertical plate and the second vertical plate, and are used to drain water in the first cavity and the second cavity.

6. The assembled shoulder widening structure according to claim 5 is characterized in that: The diameter of the drainage hole ranges from 40 mm to 80 mm.

7. The assembled shoulder widening structure according to claim 1 is characterized in that: The height h of the first plate portion of the first vertical plate ranges from 300mm to 500mm, the width b of the first plate portion of the first vertical plate ranges from 200mm to 400mm, the thickness c of the first plate portion of the first vertical plate ranges not less than 200mm, and the size of the second plate portion of the second vertical plate is set with reference to the size of the first plate portion of the first vertical plate.

8. The assembled shoulder widening structure according to claim 7 is characterized in that: The length of the first horizontal portion of the first transverse plate is the same as the height of the first plate portion of the first vertical plate, the width of the first horizontal portion of the first transverse plate is the same as the width of the first plate portion of the first vertical plate, and the thickness of the first horizontal portion of the first transverse plate is the same as the thickness of the first plate portion of the first vertical plate.

9. The assembled shoulder widening structure according to claim 7, characterized in that: The width of the groove bottom surface of the first groove is c / 3, and the widths of the groove bottom surface of the first groove, the groove bottom surface of the second groove, and the groove bottom surface of the third groove are the same.

10. A construction method for an assembled shoulder widening structure, characterized in that: The construction steps include: A prefabricated shoulder widening structure according to any one of claims 1 to 9 is provided, wherein on a slope where shoulder widening is required, the first vertical plate, the first horizontal plate, the second vertical plate and the second horizontal plate are assembled layer by layer from the slope foot to the shoulder, the first connecting portion of the first vertical plate is buried in the ground at a depth of not less than 100 mm, foam lightweight soil is backfilled between the first plate portion of the first vertical plate and the slope, the first tenon of the first horizontal plate is installed in the first groove of the first vertical plate, the first horizontal portion of the first horizontal plate extends into the slope, the second tenon of the second vertical plate is installed in the second groove of the first horizontal plate, the second connecting portion of the second vertical plate extends into the slope, foam lightweight soil is backfilled between the second plate portion of the second vertical plate and the slope, the third tenon of the second horizontal plate is installed in the third groove of the second vertical plate, the second horizontal portion of the second horizontal plate extends into the existing shoulder by 100 mm, and the second horizontal portion and the existing shoulder are connected to form a new shoulder.

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