Prefabricated shoulder widening structure and construction method

Abstract

The application relates to the technical field of road construction and aims to solve the problem of how to improve the stability of a widened shoulder structure, and provides a fabricated widened shoulder structure and a construction method.The fabricated widened shoulder structure comprises 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 part and a first connecting part.The first horizontal 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 horizontal plate comprises a second horizontal part and a third tenon.The fabricated widened shoulder structure is sequentially connected through the first vertical plate, the first horizontal plate, the second vertical plate and the second horizontal plate, the first connecting part protrudes into the ground below and is fixed with the ground, the second connecting part protrudes into the surface of the side slope below and is fixed with the side slope, and the first horizontal plate and the second horizontal plate are in contact with the side slope to increase the friction along the horizontal direction, so that the horizontal soil pressure is resisted, and the effect of improving the overall stability of the fabricated widened shoulder structure is achieved.

Description

TECHNICAL FIELD

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

[0002] The part without ballast covering on both sides of the subgrade surface is the road shoulder. The perfect road shoulder is beneficial to the stability of the ballast and the integrity of the subgrade surface. The road shoulder provides necessary space for the overhead contact system column, sound barrier, cable trench and other equipment. The road shoulder is also the access for the maintenance personnel. After the operation of the line, the subgrade may be subsided, eroded or washed away, or due to construction errors, maintenance needs and other reasons, the width of the existing road shoulder is insufficient, and the section of the existing line with insufficient road shoulder width needs to be widened and remedied.

[0003] In the prior art, the road shoulder widening usually adopts the way of setting a road shoulder ballast retaining wall and filling the embankment slope to widen. However, the filling of the embankment slope to widen is easy to cause new land expropriation, and the ballast retaining wall is easy to have the phenomenon of extrusion, which causes the overall structure of the widened road shoulder to be unstable. How to solve the above technical problems is considered by the person skilled in the art. SUMMARY

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

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

[0006] Compared with the prior art, the assembled road shoulder widening structure is sequentially assembled and connected through the first vertical plate, the first horizontal plate, the second vertical plate and the second horizontal plate, so that standardization production is facilitated, the excavation of the roadbed and the new land requisition are reduced, and the construction efficiency is improved; the first connecting part protrudes into the ground below so that the first plate part is fixed with the ground, the second connecting part protrudes into the surface of the slope below so that the second plate part is fixed with the slope, and the first horizontal plate and the second horizontal plate are used for contacting the slope to increase the friction along the horizontal direction, so that the horizontal soil pressure is resisted, and the overall stability of the assembled road shoulder widening structure is improved.

[0007] In a possible implementation, the first connecting part comprises a first horizontal flange, a second horizontal flange and a first vertical flange, the first horizontal flange and the second horizontal flange are arranged opposite to the first plate part, the first horizontal flange and the second horizontal flange protrude along the horizontal direction, and the first vertical flange protrudes along the vertical direction.

[0008] In the embodiment, the assembled road shoulder widening structure includes a first connecting portion of the first vertical plate, the first connecting portion including a first horizontal flange, a second horizontal flange, and a first vertical flange. The first horizontal flange and the second horizontal flange extend into the ground along the horizontal direction, so that the first horizontal flange and the second horizontal flange jointly support the first plate portion to reduce the overturning and dumping of the first plate portion. The first vertical flange is inserted into the ground along the vertical direction to fix the first vertical plate to the ground, so as to improve the overall stability of the assembled road shoulder widening structure.

[0009] In a possible implementation, the second connecting portion includes a third horizontal flange and a second vertical flange. The third horizontal flange is opposite to the second protruding tenon and extends along the horizontal direction. The second vertical flange extends along the vertical direction.

[0010] In the embodiment, the second connecting portion of the second vertical plate includes a third horizontal flange and a second vertical flange. The third horizontal flange extends into the slope along the horizontal direction, and the second protruding tenon extends into the first groove along the horizontal direction, so that the third horizontal flange and the second protruding tenon jointly support the second plate portion to reduce the overturning and dumping 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, so as to improve the overall stability of the assembled road shoulder widening structure.

[0011] In a possible implementation, the first vertical plate, the first horizontal plate, and the slope enclose a first cavity, and the second vertical plate, the second horizontal plate, and the slope enclose a second cavity. The first cavity and the second cavity are filled with foamed lightweight soil.

[0012] In the embodiment, the first cavity and the second cavity are filled with foamed lightweight soil, so as to increase the frictional force received by the first horizontal plate and the second horizontal plate along the horizontal direction, to resist the soil pressure in the horizontal direction, so as to improve the overall stability of the assembled road shoulder widening structure.

[0013] In a possible implementation, the assembled road shoulder widening structure further includes a drainage hole. The drainage hole is arranged on the first vertical plate and the second vertical plate, respectively. The drainage hole is used to drain water in the first cavity and the second cavity.

[0014] In the embodiment, the drainage hole is used to drain water in the first cavity and the second cavity, so as to reduce the water pressure received by the assembled road shoulder widening structure along the horizontal direction, so as to improve the overall stability of the assembled road shoulder widening structure.

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

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

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

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

[0019] The embodiment of the present application also provides a construction method of the prefabricated road shoulder widening structure, which comprises the following construction steps: providing the prefabricated road shoulder widening structure, assembling the first vertical plate, the first horizontal plate, the second vertical plate, and the second horizontal plate layer by layer from the slope toe to the road shoulder direction on the slope where the road shoulder needs to be widened, the first connecting part of the first vertical plate is embedded into the ground with a depth of not less than 100 mm, the first plate part of the first vertical plate is backfilled with foam lightweight soil between the first plate part and the slope, the first tenon of the first horizontal plate is installed into the first mortise of the first vertical plate, the first horizontal part of the first horizontal plate is inserted into the slope, the second tenon of the second vertical plate is installed into the second mortise of the first horizontal plate, the second connecting part of the second vertical plate is inserted into the slope, the second plate part of the second vertical plate is backfilled with foam lightweight soil between the second plate part and the slope, the third tenon of the second horizontal plate is installed into the third mortise of the second vertical plate, the second horizontal part of the second horizontal plate is inserted into the existing road shoulder by 100 mm, and the second horizontal part is connected with the existing road shoulder to form a new road shoulder. BRIEF DESCRIPTION OF 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 as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 FIG. 1 is a perspective view of the prefabricated road shoulder widening structure of an embodiment of the present application;

[0022] Figure 2 FIG. 2 is a sectional view of the prefabricated road shoulder widening structure of an embodiment of the present application;Figure 1 a perspective view of a first vertical plate of the fabricated road shoulder widening structure;

[0023] Figure 3 for Figure 1 a perspective view of a first horizontal plate of the fabricated road shoulder widening structure;

[0024] Figure 4 for Figure 1 a perspective view of a second vertical plate of the fabricated road shoulder widening structure;

[0025] Figure 5 for Figure 1 a perspective view of a second horizontal plate of the fabricated road shoulder widening structure;

[0026] Figure 6 for Figure 1 a structural schematic view of construction of the fabricated road shoulder widening structure.

[0027] Main component symbol explanation:

[0028] 1, fabricated road shoulder widening structure; 11, first vertical plate; 111, first plate part; 112, first connecting part; 113, first transverse flange; 114, second transverse flange; 115, first vertical flange; 116, first groove; 117, first cavity; 12, first horizontal plate; 121, first horizontal part; 122, first tenon; 123, second groove; 13, second vertical plate; 131, second plate part; 132, second tenon; 133, second connecting part; 134, third transverse flange; 135, second vertical flange; 136, third groove; 137, second cavity; 14, second horizontal plate; 141, second horizontal part; 142, third tenon; 15, drainage hole; 16, vertical direction; 17, horizontal direction; 2, ground; 3, slope; 31, step; 4, foamed lightweight soil. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application.

[0030] Some embodiments of the present application are described in detail. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0031] EMBODIMENTS

[0032] Please refer to Figures 1 to 6As shown, the embodiment provides an assembled shoulder widening structure 1, which comprises 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 part 111 and a first connecting part 112, the first plate part 111 extends along a vertical direction 16, a top surface of the first plate part 111 is recessed to form a first recess 116, a bottom surface of the first plate part 111 is integrally connected with the first connecting part 112, and the first connecting part 112 protrudes below the ground 2 so that the first plate part 111 is fixed with the ground 2. The first horizontal plate 12 comprises a first horizontal part 121 and a first tenon 122, one end of the first horizontal part 121 is integrally connected with the first tenon 122, and the other end extends along a horizontal direction 17, an end of the first horizontal part 121 extending is provided with a second recess 123, and the first tenon 122 protrudes into the first recess 116 along the vertical direction 16 so that the first horizontal part 121 is connected with the first plate part 111. The second vertical plate 13 comprises a second plate part 131, a second tenon 132 and a second connecting part 133, the second plate part 131 extends along the vertical direction 16, a top surface of the second plate part 131 is recessed to form a third recess 136, a bottom surface of the second plate part 131 is integrally connected with the second connecting part 133, the second connecting part 133 protrudes below a surface of the slope 3 so that the second plate part 131 is fixed with the slope 3, and the second tenon 132 is integrally connected with a side surface of the second plate part 131, and the second tenon 132 protrudes into the second recess 123 along the horizontal direction 17 so that the second plate part 131 is connected with the first horizontal part 121. The second horizontal plate 14 comprises a second horizontal part 141 and a third tenon 142, one end of the second horizontal part 141 is integrally connected with the third tenon 142, and the other end extends along the horizontal direction 17, the third tenon 142 protrudes into the third recess 136 along the vertical direction 16 so that the second horizontal part 141 is connected with the second plate part 131, and the second horizontal part 141 is used for widening the existing shoulder.

[0033] In the embodiment, the assembled shoulder widening structure 1 is sequentially assembled and connected by the first vertical plate 11, the first horizontal plate 12, the second vertical plate 13 and the second horizontal plate 14, which is conducive to standardized production, and the assembled shoulder widening structure 1 is conducive to reducing excavation and new land requisition of the roadbed and improving construction efficiency; the first connecting part 112 protrudes below the ground 2 so that the first plate part 111 is fixed with the ground 2, the second connecting part 133 protrudes below the surface of the slope 3 so that the second plate part 131 is fixed with 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 assembled shoulder widening structure 1.

[0034] In a possible implementation, the first connecting portion 112 comprises 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 opposite to 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 the embodiment, the first connecting portion 112 of the first vertical plate 11 comprises the first lateral flange 113, the second lateral flange 114 and the first vertical flange 115, 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 support the first plate portion 111 to reduce the overturning of the first plate portion 111, and 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 assembled road shoulder widening structure 1.

[0036] In a possible implementation, the second connecting portion 133 comprises a third lateral flange 134 and a second vertical flange 135, the third lateral flange 134 and the second protrusion 132 are arranged opposite to the second plate portion 131, the third lateral flange 134 protrudes along the horizontal direction 17, and the second vertical flange 135 protrudes along the vertical direction 16.

[0037] In the embodiment, the second connecting portion 133 of the second vertical plate 13 comprises the third lateral flange 134 and the second vertical flange 135, the third lateral flange 134 extends into the slope 3 along the horizontal direction 17, and the second protrusion 132 extends into the first groove 116 along the horizontal direction 17, so that the third lateral flange 134 and the second protrusion 132 jointly support the second plate portion 131 to reduce the overturning 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 assembled road 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 the foamed lightweight soil 4.

[0039] In the embodiment, the first cavity 117 and the second cavity 137 are filled with the foamed lightweight soil 4, thereby increasing the frictional force of the first horizontal plate 12 and the second horizontal plate 14 along the horizontal direction 17 to resist the soil pressure along the horizontal direction 17, thereby improving the overall stability of the assembled road shoulder widening structure 1.

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

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

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

[0043] In the 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 industrialization and standardization 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 the material waste and loss in the construction process.

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

[0045] In the embodiment, the drainage hole 15 is arranged on the first vertical plate 11 and the second vertical plate 13 respectively, and the size of the drainage hole 15 ranges from 40 mm to 80 mm, which can be flexibly adjusted according to actual conditions. Optionally, a drainage pipe is arranged in the drainage hole 15, the drainage pipe extends and is inserted into the original slope 3 to drain water, and a filter layer is arranged in the drainage pipe, so as to reduce the foamed lightweight soil 4 or the soil of the slope 3 from being washed out by water.

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

[0047] In the 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, the prefabricated shoulder widening structure 1 is convenient to maintain and replace, and the difficulty and cost of later maintenance are reduced.

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

[0049] In the 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 in the shape of a concave letter, the cross-sectional shape of the second groove 123 of the first horizontal plate 12 is in the shape of an L letter, the widths of the groove bottom surfaces of the first groove 116, the second groove 123 and the third groove 136 along the vertical direction 16 are c / 3, and this is beneficial to the lapping assembly.

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

[0051] In the embodiment, a step 31 is dug on the surface of the slope 3 requiring shoulder widening, and the shoulder widening protection is assembled layer by layer from the slope toe to the shoulder direction. The first vertical plate 11 is arranged near the slope toe according to the site conditions. The first connecting part 112 of the first vertical plate 11 is buried to a depth of not less than 0.1 m, so that the first connecting part 112 is completely buried below the ground 2. After the first vertical plate 11 is arranged, the first plate part 111 is backfilled with foam lightweight soil 4 to the slope 3 to a height consistent with the first plate part 111. The first horizontal plate 12 is installed to the first vertical plate 11, the first recess 116 and the first tenon 122 are lapped, and the first horizontal part 121 of the first horizontal plate 12 extends into the original slope 3. The second vertical plate 13 is installed to the first horizontal plate 12, the second tenon 132 and the second recess 123 are lapped, and the second connecting part 133 of the second vertical plate 13 at the lapped part is buried in 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 to a height consistent with the second plate part 131. The second horizontal plate 14 is installed to the second vertical plate 13, the third tenon 142 and the third recess 136 are lapped, and the second horizontal part 141 of the second horizontal plate 14 extends into the original shoulder 0.1 m to form a new shoulder.

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

[0053] The assembled road shoulder widening structure 1 has less disturbance to the existing roadbed during construction, does not need to be excavated as a whole, reduces the new land requisition, and greatly reduces the amount of masonry work. The assembled structure is used for on-site splicing construction, which reduces energy consumption during the construction process, improves the efficiency of on-site construction, and fully embodies the green and low-carbon construction goal. The industrialized and standardized production mode 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. At the same time, due to the standardization of the components, the assembled road shoulder also has better maintainability and replaceability, which reduces the difficulty and cost of later maintenance. The assembled road shoulder produces less construction waste during the construction process, reducing the burden on the environment. In addition, the repair and replacement of the assembled road shoulder is also more fast and environmentally friendly, which can achieve the green and ecological recyclable construction goal of fast assembly and disassembly, recycling, zero emission 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 spent on cast-in-place, reduces the construction period, and has low construction cost; the precast plate has strong flexibility in length, and the specific size of the first vertical plate 11, the first horizontal plate 12, the second vertical plate 13 and the second horizontal plate 14 can be precast 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 filled with foam light soil 4 to reduce the force on the road shoulder structure. The foam light soil 4 contains a large number of small bubble groups and has a small bulk density. By adjusting the content of the cementing material, the bulk density can be changed within the range of 5-15 kNm 3 , which has significant advantages in reducing the self-weight of the structure and the bearing pressure requirement of the foundation.

[0055] In summary, the assembled road shoulder widening structure 1 and the construction method provided by the embodiment realize a new type of assembled road shoulder widening 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 along the longitudinal direction of the road, and the structure is backfilled with water seepage material between the structure and the original slope 3, so that the drainage of the bed is smooth. The assembled road shoulder widening structure 1 and the construction method provided by the embodiment can not only improve the overall stability of the roadbed, but also reduce the disturbance to the soil during construction, reduce the new land requisition, shorten the construction period, and reduce the construction cost.

[0056] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced without departing from the spirit and scope of the present application.

Claims

1. A prefabricated road shoulder widening structure, characterized in that, include: The first vertical plate includes a first plate portion and a first connecting portion. The first plate portion extends along the 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 into the ground to fix the first plate portion to the ground. The first horizontal plate includes a first horizontal part and a first tenon. One end of the first horizontal part is integrally connected to the first tenon, and the other end extends in the horizontal direction. The extended end of the first horizontal part is provided with a second groove. The first tenon protrudes into the first groove in the vertical direction so that the first horizontal part is connected to the first plate part. The second vertical plate includes a second plate portion, a second tenon, and a second connecting portion. The second plate portion extends vertically, and a third groove is formed by a recess on the top surface of the second plate portion. The bottom surface of the second plate portion is integrally connected to the second connecting portion. The second connecting portion protrudes below the surface of the slope to fix the second plate portion to the slope. The second tenon is integrally connected to the side surface of the second plate portion. The second tenon protrudes horizontally into the second groove to connect the second plate portion to the first horizontal portion. The second horizontal plate includes a second horizontal part and a third tenon. One end of the second horizontal part is integrally connected to the third tenon, and the other end extends in the horizontal direction. The third tenon protrudes into the third groove in the vertical direction so that the second horizontal part is connected to the second plate part. The second horizontal part is used to widen the existing road shoulder.

2. The prefabricated shoulder widening structure according to claim 1, 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 disposed opposite to each other on the first plate portion. The first transverse flange and the second transverse flange protrude in the horizontal direction, and the first vertical flange protrudes in the vertical direction.

3. The prefabricated shoulder widening structure according to claim 1, 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 disposed opposite to each other on the second plate portion. The third transverse flange protrudes in the horizontal direction, and the second vertical flange protrudes in the vertical direction.

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

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

6. The prefabricated shoulder widening structure according to claim 5, characterized in that: The diameter of the drain hole ranges from 40mm to 80mm.

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

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

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

10. A construction method for a prefabricated shoulder widening structure, characterized in that, The construction steps include the following: A prefabricated shoulder widening structure according to any one of claims 1 to 9 is provided, wherein, on a slope requiring shoulder widening, the first vertical plate, the first horizontal plate, the second vertical plate, and the second horizontal plate are assembled layer by layer from the toe of the slope to the shoulder. The first connecting portion of the first vertical plate is buried in the ground to a depth of not less than 100 mm. Foamed 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 into 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 into the second groove of the first horizontal plate. The second connecting portion of the second vertical plate extends into the slope. Foamed 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 into 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. The second horizontal portion and the existing shoulder are connected to form a new shoulder.

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