Highway embankment widening structure and construction method thereof

Abstract

The application discloses a highway embankment widening structure and a construction method thereof, which comprises a drainage cushion layer, which is paved at an original embankment of an existing highway, a drainage groove is formed in the original embankment, and the drainage cushion layer is filled in the drainage groove; a pressure bearing grid is arranged on the upper part of the drainage cushion layer; a plurality of supporting piles are arranged, the lower part of the supporting piles is embedded in the drainage cushion layer, the upper part of the supporting piles is arranged in the mesh of the pressure bearing grid and extends to the upper part of the pressure bearing grid; first concrete is paved on the pressure bearing grid, the first concrete is wrapped around the pressure bearing grid and the supporting piles to form a hardened pavement layer, and the hardened pavement layer is flush with the pavement of the existing highway; and fillers are filled on the side, away from the existing highway, of the drainage cushion layer and the hardened pavement layer to form a slope protection. The application solves the problem that the height difference between the new and old pavements is prone to occurring after the existing embankment is widened.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a highway embankment widening structure and its construction method. Background Technology

[0002] Because the existing roads are too narrow to meet traffic demands, they are widened. In addition, widening existing roads can be achieved through expansion or reconstruction, or through localized widening, such as adding emergency stopping lanes, passing lanes, and superelevation in suitable sections. For example, when a car travels on a curve, the trajectories of each wheel are different. The rear wheels on the inside of the curve have the smallest radius, while the front wheels near the outside have the largest. This phenomenon is more pronounced when the turning radius is small. To ensure that cars do not encroach on adjacent lanes when turning, all curved sections with a radius less than 250 meters need to be widened.

[0003] Currently, in highway embankment widening projects, the widened area and the original road surface are prone to differences in road height due to settlement. Existing measures are not only difficult to guarantee and control differential deformation of the embankment in the later stage, but also difficult to guarantee good drainage performance, especially for road sections with large embankment filling height and high requirements for differential settlement control.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, a highway embankment widening structure and its construction method are provided to solve the problem of differences in road surface height between the old and new road surfaces after the existing embankment is widened.

[0006] To achieve the above objectives, a highway embankment widening structure is provided, comprising:

[0007] A drainage cushion layer is laid on the original embankment of an existing highway, where a drainage ditch is provided, and the cushion material of the drainage cushion layer is filled in the drainage ditch.

[0008] A pressure-bearing mesh is laid on top of the drainage pad material layer;

[0009] Multiple support piles, the lower part of which is buried in the drainage cushion layer, and the upper part of which passes through the mesh of the pressure-bearing grid and extends to the upper part of the pressure-bearing grid;

[0010] The first concrete is spread on the bearing grid, and the first concrete covers the bearing grid and the multiple support piles to form a hardened pavement layer, which is flush with the existing road surface.

[0011] Filler material is used to fill the drainage cushion layer and the hardened pavement layer on the side away from the existing highway to form a slope protection.

[0012] Furthermore, the drainage pad layer includes:

[0013] The coarse material layer is laid on the upper surface of the existing embankment of the highway.

[0014] The fine material layer is spread on top of the coarse material layer.

[0015] Furthermore, the coarse material layer has pile holes, the lower end of the support pile is inserted into the pile hole, and a second concrete is poured between the opening of the pile hole and the support pile, and the second concrete is solidified to form a flange ring plate.

[0016] Furthermore, the diameter of the pile hole gradually increases from bottom to top.

[0017] Furthermore, the flange ring plate is annular, and the thickness of the flange ring plate gradually decreases from the inner edge of the flange ring plate to the outer edge of the flange ring plate.

[0018] Furthermore, the pressure-bearing mesh includes:

[0019] Multiple longitudinal beams are provided, spaced apart along the width of the existing highway.

[0020] Multiple transverse beams are connected between multiple longitudinal beams, and the multiple transverse beams are spaced apart along the length direction of the longitudinal beams.

[0021] Furthermore, the longitudinal beam is arranged along the length of the existing highway.

[0022] Furthermore, the transverse beam is arranged along the width direction of the existing highway.

[0023] This invention provides a construction method for a highway embankment widening structure, comprising the following steps:

[0024] Clear the embankments on both sides of the existing highway;

[0025] A drainage ditch is constructed at the original embankment of the existing highway.

[0026] The drainage bedding layer is laid on the original embankment so that the bedding material of the drainage bedding layer fills the drainage channel;

[0027] The pressure-bearing mesh is laid on top of the drainage pad layer;

[0028] The lower part of multiple support piles is buried in the drainage cushion layer, so that the upper part of the support piles passes through the mesh of the pressure-bearing grid and extends to the upper part of the pressure-bearing grid.

[0029] The first concrete is spread on the bearing grid, so that the first concrete covers the bearing grid and the multiple support piles to form a hardened pavement layer, which is flush with the existing road surface.

[0030] Filler material is placed on the side of the drainage cushion layer and the hardened pavement layer away from the existing highway to form a slope protection.

[0031] The beneficial effects of this invention are as follows: The highway embankment widening structure and its construction method involve excavating drainage trenches downwards to place drainage pads inside, compacting and leveling them, and then extending the roadbed slope outwards to create a segmented sloping design. A pressure-bearing grid is then laid on top of the drainage pad layer. After installing and inserting support piles, pile trenches are excavated at the bottom edge of the support pile positions, and concrete is filled, vibrated, and smoothed within these trenches. A smaller-grained drainage pad layer is then laid on the compacted and leveled drainage pad surface, achieving the preset roadbed height. Filling material and soil and turf are then added to the sides of the embankment. This avoids the difference in road height between the widened area and the old road surface due to settlement, thus ensuring and controlling the later-stage stability of the embankment and achieving the goal of good drainage performance. This facilitates optimization for road sections with large embankment heights and high requirements for differential settlement control. Attached Figure Description

[0032] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0033] Figure 1 This is a schematic diagram of the highway embankment widening structure according to an embodiment of the present invention. Detailed Implementation

[0034] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] Reference Figure 1 As shown, the present invention provides a highway embankment widening structure, comprising: a drainage cushion layer, a pressure-bearing grid 3, multiple support piles 2, a first concrete layer, and fill material.

[0037] The drainage cushion layer is laid on the existing embankment of the existing highway 5. A drainage channel 50 is constructed at the existing embankment. The cushion material of the drainage cushion layer fills the drainage channel 50. A pressure-bearing grid 3 is laid on top of the drainage cushion layer. The lower part of the support piles 2 is embedded in the drainage cushion layer. The upper part of the support piles 2 passes through the mesh of the pressure-bearing grid 3 and extends to the top of the pressure-bearing grid 3. First concrete is laid on the pressure-bearing grid 3. The first concrete covers the pressure-bearing grid 3 and multiple support piles 2 to solidify and form a hardened pavement layer 4. The hardened pavement layer 4 is flush with the road surface of the existing highway 5. Filler is placed on the side of the drainage cushion layer and the hardened pavement layer 4 away from the existing highway 5 to form a slope protection.

[0038] In a preferred embodiment, the drainage pad layer includes a coarse material layer 11 and a fine material layer 12.

[0039] The coarse material layer 11 is laid on the upper surface of the existing embankment of the existing highway 5. The fine material layer 12 is laid on top of the coarse material layer 11.

[0040] In this embodiment, the coarse material layer and the fine material layer are crushed stone layers. The particle size of the crushed stone in the coarse material layer is larger than that in the fine material layer.

[0041] During the installation of the support piles, a coarse material layer is first laid, and multiple pile holes are drilled on the upper part of the coarse material layer 11. The diameter of the pile holes gradually increases from bottom to top. The multiple pile holes are arranged in a matrix. The lower end of the support pile 2 is inserted into the pile hole. A second layer of concrete is poured between the opening of the pile hole and the support pile 2, and the second layer of concrete solidifies to form a flange ring plate 21.

[0042] The consolidated flange ring plate 21 is annular. The thickness of the flange ring plate 21 gradually decreases from the inner edge of the flange ring plate 21 to the outer edge of the flange ring plate.

[0043] As a preferred embodiment, the pressure grid 3 includes: multiple longitudinal beams and multiple transverse beams.

[0044] Multiple longitudinal beams are spaced apart along the width of the existing highway 5. Transverse beams connect the multiple longitudinal beams. Multiple transverse beams are spaced apart along the length of the longitudinal beams.

[0045] In this embodiment, the longitudinal beams are arranged along the length of the existing highway 5. The transverse beams are arranged along the width of the existing highway 5. The longitudinal beams and transverse beams are arranged perpendicularly to each other.

[0046] This invention provides a construction method for a highway embankment widening structure, comprising the following steps:

[0047] S1: Clear the embankments on both sides of the existing highway 5.

[0048] Specifically, in this embodiment, the outer sides of the existing highway, i.e., the embankment, are cleared. The area requiring widening is cleared, potholes are filled, and protruding parts are removed.

[0049] S2: A drainage channel 50 is constructed at the original embankment of the existing highway 5.

[0050] After the site to be expanded is cleared and leveled, a drainage ditch is dug downwards. In this embodiment, the drainage ditch is grid-shaped.

[0051] S3: Spread the drainage bedding layer on the original embankment so that the bedding material of the drainage bedding layer fills the drainage channel 50.

[0052] After digging the drainage trench, place drainage bedding material inside it and compact and level it.

[0053] The roadbed slope is extended outward, so that the roadbed slope is set in a segmented slope, and each segment of the slope is set as an inclined surface.

[0054] S4: Lay the pressure-bearing mesh 3 on top of the drainage pad material layer.

[0055] Enclosure panels are installed at the outer edges of the pressure-bearing grid and drainage cushion layer. A pouring space is formed between the enclosure panels and the side of the existing road.

[0056] S5: The lower part of multiple support piles 2 is buried in the drainage cushion layer, so that the upper part of the support piles 2 passes through the mesh of the pressure grid 3 and extends to the upper part of the pressure grid 3.

[0057] S6: The first concrete is spread on the bearing grid 3, so that the first concrete covers the bearing grid 3 and multiple support piles 2 to form a hardened pavement layer 4, which is flush with the existing road surface 5.

[0058] The first concrete is poured into the space between the fence panels and the existing road, and the poured concrete is vibrated. The top surface of the concrete is then smoothed to solidify and form a hardened road surface layer.

[0059] S7: Fill the drainage cushion layer and hardened pavement layer 4 on the side away from the existing highway 5 to form a slope protection.

[0060] After the concrete of the hardened pavement layer has fully solidified, the retaining walls are removed from the outer edge of the roadbed, and filler material is poured into the side of the embankment. Soil and turf are then laid on the surface of the filler material, and the top surface of the filler material is completely covered.

[0061] This invention relates to a highway embankment widening structure and its construction method. By excavating a drainage trench and inserting drainage pad material inside, which is then compacted and leveled, the roadbed slope is extended outwards, resulting in a segmented sloping design. A pressure-bearing grid is then laid on top of the drainage pad material layer. After installing and inserting support piles, pile trenches are excavated at the bottom edge of the support pile positions. Concrete is then filled into these trenches, vibrated, and smoothed. Finally, a smaller-grained drainage pad layer is laid on the compacted drainage pad material surface, achieving the preset roadbed height. Filling material and soil and turf are then added to the sides of the embankment. This avoids the difference in road height between the widened area and the old road surface due to settlement, ensuring and controlling the later-stage stability of the embankment. It also achieves the goal of ensuring good drainage performance, facilitating optimization for road sections with large embankment heights and high requirements for differential settlement control.

[0062] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A highway embankment widening structure, characterized by, The application relates to a method for constructing a new road on the basis of an existing road, comprising the following steps: a drainage cushion layer is laid on the original embankment of the existing road, wherein the original embankment is provided with a drainage groove, and the drainage cushion layer is filled in the drainage groove; a pressure-bearing grid is laid on the upper part of the drainage cushion layer; a plurality of supporting piles are embedded in the drainage cushion layer, and the upper parts of the supporting piles are arranged in the meshes of the pressure-bearing grid and extend to the upper part of the pressure-bearing grid; a first concrete is laid on the pressure-bearing grid, and the first concrete is wrapped around the pressure-bearing grid and the plurality of supporting piles to form a hardened pavement layer, wherein the hardened pavement layer is flush with the pavement of the existing road; filling material is filled on the side of the drainage cushion layer and the hardened pavement layer away from the existing road to form a slope protection. The drainage cushion layer comprises: a coarse material layer laid on the upper surface of the original embankment of the existing road; a fine material layer laid on the upper part of the coarse material layer; the coarse material layer is provided with pile holes, the lower ends of the supporting piles are inserted into the pile holes, and the pile holes are filled with a second concrete between the pile hole openings and the supporting piles, and the second concrete is solidified to form a flange ring plate; the hole diameter of the pile hole gradually increases from bottom to top; the flange ring plate is annular, and the thickness of the flange ring plate gradually decreases from the inner edge of the flange ring plate to the outer edge of the flange ring plate; the pressure-bearing grid comprises: a plurality of longitudinal beams, wherein the plurality of longitudinal beams are arranged in the width direction of the existing road; a plurality of transverse beams, wherein the transverse beams are connected between the plurality of longitudinal beams, and the plurality of transverse beams are arranged in the length direction of the longitudinal beams; the longitudinal beams are arranged in the length direction of the existing road; the transverse beams are arranged in the width direction of the existing road.

2. A method of constructing a highway embankment widening structure as claimed in any one of claims 1, characterised in that, The application relates to a method for constructing a new road on the basis of an existing road, comprising the following steps: the embankments on the opposite sides of the existing road are cleaned; a drainage groove is formed on the original embankment of the existing road; a drainage cushion layer is laid on the original embankment, so that the drainage cushion layer is filled in the drainage groove; a pressure-bearing grid is laid on the upper part of the drainage cushion layer; the lower parts of a plurality of supporting piles are embedded in the drainage cushion layer, so that the upper parts of the supporting piles are arranged in the meshes of the pressure-bearing grid and extend to the upper part of the pressure-bearing grid; a first concrete is laid on the pressure-bearing grid, so that the first concrete is wrapped around the pressure-bearing grid and the plurality of supporting piles to form a hardened pavement layer, wherein the hardened pavement layer is flush with the pavement of the existing road; filling material is filled on the side of the drainage cushion layer and the hardened pavement layer away from the existing road to form a slope protection.

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