Roadbed for municipal road engineering

Abstract

The utility model relates to the technical field of municipal engineering, in particular to a roadbed for municipal road engineering, which adopts the technical scheme that the roadbed comprises an original foundation and a substrate layer, earthwork is excavated on the top surface of the original foundation, the substrate layer is paved on the top surface of the excavated original foundation, and a roadbed layer is paved on the top surface of the substrate layer. A base layer is laid on the top face of the roadbed layer, a surface layer is laid on the top face of the base layer, a plurality of stand columns are arranged and installed on the surface of the original foundation, the lower ends of the stand columns are inserted into the deep position of the original foundation, fixing rods are inserted into the upper ends of the stand columns, and geogrids are fixedly installed between the fixing rods at the upper ends of the stand columns. The roadbed structure has the beneficial effects that the overall tensile strength and shear strength of the roadbed are enhanced through the geogrids which are vertically arranged in each layer of the roadbed, so that the effect of reducing hollowing in the roadbed is achieved, the problems of cracks, cracks or local collapse and the like on the pavement are further avoided, the service life of the pavement is prolonged, and the safety of the pavement is improved.

Description

Technical Field

[0001] This utility model relates to the field of municipal engineering technology, specifically to a roadbed for municipal road engineering. Background Technology

[0002] The roadbed is the foundation of the pavement, sharing traffic loads with it and therefore possessing sufficient strength, resistance to deformation, and durability. The roadbed should be designed comprehensively as a geotechnical structure supporting the pavement. Roadbed design should adhere to the principles of investigation and research, adapting to local conditions, and utilizing local materials. It should conform to the basic principles of road construction. Before design, thorough investigations must be conducted on engineering geology, hydrology, environment, land use, cultural relics, and materials, and a correct design should be made based on road grade, traffic requirements, and natural conditions.

[0003] The existing technology has the following shortcomings: Existing roadbeds typically consist of a base layer, subgrade, base course, and surface layer. Under conditions such as rainy seasons, broken underground water pipes, or poor drainage systems, the groundwater level beneath the road surface can easily become too high. Groundwater infiltration may soften the soil in the base layer or cause it to lose some of its bearing capacity, leading to hollowing or loosening in certain areas of the base layer. Simultaneously, under the infiltration and pressure of groundwater, gravel and crushed stone materials in the subgrade may expand due to water absorption or be eroded by water flow, causing localized or widespread hollowing of the subgrade. The rise in groundwater can cause hollowing in multiple layers constituting the roadbed, potentially leading to road surface settlement and deformation, resulting in unevenness and bumps. Further, cracks, fissures, or localized collapses may appear on the road surface. These cracked and collapsed areas are prone to water accumulation, accelerating road damage and wear, and ultimately affecting the road's service life and safety.

[0004] Therefore, it is necessary to invent a roadbed for municipal road engineering. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: a roadbed for municipal road engineering, comprising an original foundation and a base layer, wherein earth is excavated on the top surface of the original foundation, a base layer is laid on the top surface of the excavated original foundation, a roadbed is laid on the top surface of the base layer, a base layer is laid on the top surface of the roadbed, a surface layer is laid on the top surface of the base layer, and a plurality of columns are arranged and installed on the surface of the original foundation, the lower end of the columns is inserted deep into the original foundation, the upper end of the columns is buried by the base layer, a fixing rod is inserted and installed on the upper end of the columns, and a geogrid is fixedly installed between the fixing rods at the upper ends of each column, and the fixing rods and the geogrid are buried by the roadbed and the base layer.

[0006] Preferably, the columns are made by drilling holes in the original foundation and injecting cement, and a plurality of the columns are arranged in a matrix on the original foundation.

[0007] Preferably, the upper end of the column is provided with grooves around its perimeter, the fixing rod is inserted into the grooves at the upper end of the column, and the geogrid is vertically arranged between each column.

[0008] Preferably, a bidirectional geogrid is laid between the original foundation, the base layer, the roadbed, and the base layer. The bidirectional geogrid is made of polypropylene and has a mesh structure.

[0009] Preferably, the base layer is formed by excavating earthwork on the original foundation and filling it with natural soil, and the top surface of the base layer is compacted by a ramming machine.

[0010] Preferably, the road base layer is made of sturdy materials such as crushed stone, gravel, or screened slag, and the surface of the road base layer is uniformly compacted.

[0011] Preferably, the base layer is made of crushed stone, gravel, or a mixture treated with concrete, and the surface of the base layer is compacted by a ramming machine.

[0012] Preferably, the base layer is made of crushed stone, gravel, or a mixture treated with concrete, and the surface of the base layer is compacted by a ramming machine.

[0013] The beneficial effects of this utility model are: by vertically setting geogrids in each layer of the roadbed, the mechanical properties of the soil are enhanced, and the overall tensile and shear strength of the roadbed is strengthened, so as to reduce the occurrence of hollow areas inside the roadbed, thereby avoiding problems such as cracks, fissures or local collapses on the road surface, and extending the service life and safety of the road surface. Attached Figure Description

[0014] Figure 1 A layered schematic diagram of a roadbed for municipal road engineering provided by this utility model;

[0015] Figure 2 A cross-sectional view of a roadbed for municipal road engineering provided by this utility model;

[0016] Figure 3 This utility model provides a schematic diagram of the installation of geogrid for roadbed in municipal road engineering.

[0017] Figure 4 A cross-sectional view of a roadbed for municipal road engineering provided by this utility model;

[0018] Figure 5 This utility model provides a detailed diagram of the installation of a fixing pole for a roadbed used in municipal road engineering.

[0019] In the diagram: 11. Original foundation, 12. Subbase, 13. Subbase, 14. Surface layer, 15. Bidirectional geogrid, 16. Column, 17. Fixing rod, 18. Geogrid, 19. Detailed Implementation

[0020] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0021] Example 1

[0022] like Figure 1 - Figure 5 As shown, a roadbed for municipal road engineering in the first aspect embodiment of this utility model includes an original foundation 11 and a base layer 12. Earthwork is excavated on the top surface of the original foundation 11, and the base layer 12 is laid on the top surface of the excavated original foundation 11. A roadbed 13 is laid on the top surface of the base layer 12, a base layer 14 is laid on the top surface of the roadbed 13, and a surface layer 15 is laid on the top surface of the base layer 14. A plurality of columns 17 are arranged and installed on the surface of the original foundation 11. The lower ends of the columns 17 are inserted deep into the original foundation 11, and the upper ends of the columns 17 are buried by the base layer 12. Fixing rods 18 are inserted and installed on the upper ends of the columns 17. Geogrids 19 are fixedly installed between the fixing rods 18 on the upper ends of each column 17. The fixing rods 18 and the geogrids 19 are buried by the roadbed 13 and the base layer 14.

[0023] In the above embodiment, it should be noted that the specific construction process is as follows: excavate the original foundation 11 to a certain depth, then drill holes on the surface of the original foundation 11 and inject cement to form columns 17, then continue to excavate the original foundation 11 to expose part of the columns 17, then install fixing rods 18 and geogrid 19 on the upper end of the columns, and finally lay the base layer 12, road base layer 13, base layer 14 and surface layer 15 in sequence; by vertically setting the geogrid 19 in each layer of the road base, the mechanical properties of the soil are enhanced, the overall tensile strength and shear strength of the road base are strengthened, so as to reduce the occurrence of hollow areas inside the road base, thereby avoiding problems such as cracks, fissures or local collapses on the road surface, and extending the service life and safety of the road surface.

[0024] Example 2

[0025] like Figure 1 - Figure 5As shown, a roadbed for municipal road engineering includes all the contents of Embodiment 1. In addition, the column 17 is made by drilling holes and injecting cement into the original foundation 11. A plurality of columns 17 are arranged in a matrix on the original foundation 11. The upper end of the column 17 is provided with grooves around its perimeter. The fixing rod 18 is inserted and installed in the groove at the upper end of the column 17. The geogrid 19 is vertically arranged between each column 17.

[0026] In the above embodiments, it should be noted that the fixing rod 18 is made of steel bars, and the geogrid 19 is made of polypropylene material. The geogrid 19 is used to enhance the overall tensile and shear strength of the roadbed.

[0027] Example 3

[0028] like Figure 1 - Figure 2 As shown, a roadbed for municipal road engineering includes all the contents of Embodiment 1. In addition, a bidirectional geogrid 16 is laid between each of the original foundation 11, base layer 12, roadbed 13 and base layer 14. The bidirectional geogrid 16 is made of polypropylene and has a mesh structure.

[0029] In the above embodiments, it should be noted that the bidirectional geogrid 16 is a geosynthetic material, which belongs to the prior art materials. The bidirectional geogrid 16 provides an effective way to improve and enhance the mechanical properties of soil structures through its high strength and flexibility, and is widely used in civil engineering, environmental engineering and building engineering.

[0030] Example 4

[0031] like Figure 1 - Figure 2 As shown, a roadbed for municipal road engineering includes all the contents of Embodiment 1. In addition, the base layer 12 is formed by excavating earthwork on the original foundation 11 and filling it with natural soil. The top surface of the base layer 12 is compacted by a soil rammer. The road base 13 is paved with strong materials such as crushed stone, gravel, or screened slag. The surface of the road base 13 is uniformly compacted. The base layer 14 is paved with crushed stone, gravel, or a mixture treated with concrete. The surface of the base layer 14 is compacted by a soil rammer. The surface layer 15 is paved with asphalt mixture or concrete. The surface layer 15 is mechanically compacted or rolled to form a smooth road surface.

[0032] In the above embodiments, it should be noted that the base layer 12 is used to ensure the overall flatness and firmness of the roadbed, the road base layer 13 has the effect of increasing the bearing capacity and stability of the roadbed, the road base layer 13 further ensures the overall flatness and stability of the roadbed, and the surface layer 15 can make the road surface more wear-resistant and at the same time play an anti-skid role.

[0033] The process of using this utility model is as follows: First, those skilled in the art excavate the original foundation 11 to a certain depth, then drill holes on the surface of the original foundation 11 and pour cement to form columns 17, then continue to excavate the original foundation 11 to expose part of the columns 17, then install fixing rods 18 and geogrid 19 on the upper end of the columns, and finally lay the base layer 12, road base layer 13, base layer 14 and surface layer 15 in sequence.

[0034] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A roadbed for municipal road engineering, comprising an original foundation (11) and a base layer (12), wherein earthwork is excavated on the top surface of the original foundation (11), the base layer (12) is laid on the top surface of the excavated original foundation (11), a roadbed (13) is laid on the top surface of the base layer (12), a base course (14) is laid on the top surface of the roadbed (13), and a surface layer (15) is laid on the top surface of the base course (14), characterized in that: Several columns (17) are arranged and installed on the surface of the original foundation (11). The lower end of the column (17) is inserted deep into the original foundation (11). The upper end of the column (17) is filled by the base layer (12). A fixing rod (18) is inserted and installed on the upper end of the column (17). A geogrid (19) is fixedly installed between the fixing rods (18) at the upper end of each column (17). The fixing rods (18) and the geogrid (19) are filled by the road base (13) and the base layer (14).

2. The roadbed for municipal road engineering according to claim 1, characterized in that: The columns (17) are made by drilling holes and injecting cement into the original foundation (11), and a plurality of the columns (17) are arranged in a matrix on the original foundation (11).

3. The roadbed for municipal road engineering according to claim 1, characterized in that: The upper end of the column (17) is provided with grooves around its perimeter. The fixing rod (18) is inserted into the groove at the upper end of the column (17). The geogrid (19) is vertically arranged between each column (17).

4. The roadbed for municipal road engineering according to claim 1, characterized in that: A bidirectional geogrid (16) is laid between each of the original foundation (11), base layer (12), roadbed (13) and base layer (14). The bidirectional geogrid (16) is made of polypropylene and has a mesh structure.

5. A roadbed for municipal road engineering according to claim 1, characterized in that: The base layer (12) is formed by excavating soil on the original foundation (11) and filling it with natural soil. The top surface of the base layer (12) is compacted by a ramming machine.

6. A roadbed for municipal road engineering according to claim 1, characterized in that: The surface layer (15) is made of asphalt mixture or concrete, and the surface layer (15) is mechanically compacted or rolled to form a smooth road surface.

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