Temporary drainage structure for widening elevated section of expressway and utilizing old road

Abstract

The utility model relates to the technical field of expressway reconstruction and extension projects, in particular to a temporary drainage structure for widening an elevated section of an expressway and utilizing an old road, an old road area and a widening area of the expressway are arranged in parallel, and the road surface of the widening area is higher than that of the old road area. A temporary drainage groove in the road length direction is formed in the position, close to the widening area, of the old road area, the depth of the temporary drainage groove is smaller than the thickness of an asphalt concrete surface layer of the old road area, and the upper end of the temporary drainage groove is flush with the upper surface of the asphalt concrete surface layer of the old road area; a plurality of water collecting wells are arranged in the length direction of the temporary drainage groove at intervals, the water collecting wells are located below the temporary drainage groove and communicated with the temporary drainage groove, and the lower portions of the water collecting wells are connected with a drainage pipe. The drainage problem caused by the temporary height difference of the road surface in the ventilation keeping period is solved, the drainage requirement in the construction period is guaranteed, and damage to an existing structure is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of highway reconstruction and expansion engineering, specifically to a temporary drainage structure for widening and raising sections of highways by utilizing existing roads. Background Technology

[0002] In highway widening projects, a widening zone is typically added to one side of the existing road, with the existing road area and the widening zone running parallel. During the elevation phase, both the existing road area and the widening zone need to be raised to the same height simultaneously. However, in actual construction, the widening zone is often completed first, resulting in a height difference between the existing road area and the widening zone during traffic maintenance, which obstructs the original drainage pathways.

[0003] To address the issue of drainage path obstruction caused by the elevation difference between the old road area and the widened area, traditional temporary drainage measures often involve external open ditches or temporary pipelines. These measures suffer from long construction periods, damage to the existing road structure, and susceptibility to water seepage. Especially during the rainy season, accumulated water can easily seep into the base layer, causing the roadbed to soften. Furthermore, the temporary guardrail area lacks an integrated drainage design, resulting in low drainage efficiency and high maintenance costs.

[0004] In summary, there is an urgent need for a temporary drainage structure that utilizes the existing road surface when widening and raising sections of highways to solve the problems existing in the current technology. Utility Model Content

[0005] The purpose of this utility model is to provide a temporary drainage structure for utilizing the old road in the elevated section of a widened highway, aiming to solve the problem of blocked drainage paths in highway expansion projects due to the elevation difference between the old road area and the widened area. The specific technical solution is as follows:

[0006] A temporary drainage structure utilizing the existing road surface is disclosed for widening an elevated section of a highway. The existing road section and the widening section of the highway are arranged in parallel, with the road surface of the widening section being higher than that of the existing road section. A temporary drainage ditch is installed along the length of the road in the existing road section near the widening section. The depth of the temporary drainage ditch is less than the thickness of the asphalt concrete surface layer of the existing road section, and the upper end of the temporary drainage ditch is flush with the upper surface of the asphalt concrete surface layer of the existing road section. Multiple water collection wells are spaced apart along the length of the temporary drainage ditch. The water collection wells are located below the temporary drainage ditch and are interconnected with each other. The lower part of the water collection well is connected to a drainage pipe.

[0007] Preferably, the depth of the temporary drainage ditch is 2-8 cm less than the thickness of the asphalt concrete surface layer in the old road area.

[0008] Preferably, the longitudinal slope of the temporary drainage ditch is consistent with the road surface slope of the old road area.

[0009] Preferably, the drainage pipe is buried in the widened area, and the drainage pipe is set along the road width direction and extends to the outside of the road shoulder of the widened area.

[0010] Preferably, the slope of the drain pipe is greater than or equal to 2%.

[0011] Preferably, a gravel filter layer is provided at the outlet of the drain pipe.

[0012] Preferably, the top of the water collection well is provided with a permeable grid.

[0013] Preferably, the old road area is also equipped with a protective component, one side of which is adjacent to the widened area and the other side is adjacent to the temporary drainage ditch.

[0014] Preferably, the protective component includes a temporary guardrail base and a temporary guardrail. The temporary guardrail base is located on the old road area, with one side adjacent to the widening area and the other side adjacent to the temporary drainage ditch. The temporary guardrail is installed on the temporary guardrail base.

[0015] Preferably, both the temporary guardrail base and the water collection well are prefabricated components.

[0016] The application of the technical solution of this utility model has the following beneficial effects:

[0017] The technical solution of this utility model has the advantages of rapid construction, eco-friendliness, high seepage prevention efficiency, and cost saving. Through integrated design, it realizes the coordinated operation of temporary drainage structure and traffic safety protection facilities, which not only ensures the drainage needs during the construction period, but also avoids damage to the existing structure. It has significant economic benefits and promotion value, and is particularly suitable for the drainage of water accumulation at the junction of the old road and the widening area under the raised section.

[0018] The technical solution of this utility model solves the drainage problem caused by temporary road surface elevation differences during traffic maintenance. By setting temporary drainage channels in the asphalt concrete surface layer of the old road area, and controlling the depth of the temporary drainage channels to be less than the thickness of the asphalt concrete surface layer of the old road area, a certain thickness of the asphalt concrete surface layer of the old road area can be reserved as a waterproof layer to block rainwater infiltration and ensure road safety and structural stability during construction. At the same time, the drainage pipes are buried in the widened area, which does not require major modifications to the existing old road structure and reduces damage to the existing old road structure.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a cross-sectional view of the temporary drainage structure of this utility model at the water collection well.

[0022] Figure 2 This is a cross-sectional view of the temporary drainage structure of this utility model at a location other than a water collection well.

[0023] Among them, 1. Asphalt concrete surface layer of old road area, 2. Cement stabilized crushed stone base layer of old road area, 3. Water collection well, 4. Drainage pipe, 5. Water outlet, 6. Asphalt concrete surface layer of widened area, 7. Cement stabilized crushed stone base layer of widened area, 8. Temporary drainage ditch, 9. Temporary guardrail base, 10. Temporary guardrail. Detailed Implementation

[0024] To facilitate understanding of this invention, a more comprehensive description is provided below, along with preferred embodiments. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this invention.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0026] Example:

[0027] In highway widening projects, a widening zone is typically added to one side of the existing road. The existing road zone and the widening zone are constructed in parallel. The existing road zone consists of, from top to bottom, an asphalt concrete surface layer 1 and a cement-stabilized crushed stone base layer 2. The widening zone consists of, from top to bottom, an asphalt concrete surface layer 6 and a cement-stabilized crushed stone base layer 7. During the elevation section, both the existing road zone and the widening zone need to be raised to the same height simultaneously. However, in actual construction, the widening zone is often completed first. This results in a height difference between the existing road zone and the widening zone during traffic maintenance periods. Specifically, during the elevation section, the widening zone may be higher than the existing road zone, thus obstructing the original drainage path.

[0028] To address the drainage issue arising from the elevation difference between the existing road section and the widened section, this embodiment provides a temporary drainage structure utilizing the existing road surface in the elevated section of the widened highway, such as... Figure 1 and Figure 2 As shown.

[0029] In this embodiment, a temporary drainage ditch 8 is set along the length of the road near the widening area in the old road area. The depth of the temporary drainage ditch 8 is less than the thickness of the asphalt concrete surface layer 1 in the old road area, and the upper end of the temporary drainage ditch 8 is flush with the upper surface of the asphalt concrete surface layer 1 in the old road area. Multiple water collection wells 3 are provided at intervals along the length of the temporary drainage ditch 8. The water collection wells 3 are located below the temporary drainage ditch 8 and the two are interconnected. The lower part of the water collection well 3 is connected to the drainage pipe 4. The water collection well 3 and the drainage pipe 4 are set in a one-to-one correspondence.

[0030] Preferably, the depth of the temporary drainage ditch 8 is 2-8cm less than the thickness of the asphalt concrete surface layer 1 in the old road area. In this embodiment, the depth of the temporary drainage ditch 8 is preferably 5cm less than the thickness of the asphalt concrete surface layer 1 in the old road area. This setting can retain a 5cm thick layer of asphalt concrete surface layer 1 in the old road area as a waterproof layer to block rainwater infiltration and ensure road safety and structural stability during the construction period.

[0031] Preferably, the temporary drainage ditch 8 is obtained by milling the asphalt concrete surface layer 1 of the old road area, and the error of the reserved thickness (i.e., waterproof layer) of the asphalt concrete surface layer 1 of the old road area is controlled within ≤±1cm.

[0032] Preferably, the longitudinal slope of the temporary drainage ditch 8 is consistent with the road surface slope of the old road area, which facilitates the smooth drainage of rainwater.

[0033] Preferably, the drainage pipe 4 is buried in the widened area, and the drainage pipe 4 is set along the road width direction and extends to the outside of the road shoulder of the widened area. The drainage pipe is buried in the widened area, which does not require major modification to the existing road structure and reduces the damage to the existing road structure.

[0034] Preferably, the slope of the drainage pipe 4 is greater than or equal to 2% to facilitate the smooth discharge of rainwater from the collection well and prevent clogging. Furthermore, in this embodiment, the drainage pipe 4 is a DN200 HDPE double-wall corrugated pipe.

[0035] Preferably, a gravel filter layer is provided at the outlet 5 of the drain pipe 4 to prevent the outlet 5 of the drain pipe 4 from being blocked.

[0036] Preferably, the top of the water collection well 3 is equipped with a permeable grid to facilitate the removal of debris and guide road runoff. Furthermore, the bottom surface of the temporary drainage ditch 8 can be configured in a funnel shape at the location where the water collection well is located, with the water collection well situated at the lowest point of the funnel shape, allowing rainwater to be easily collected and discharged.

[0037] Preferably, the arrangement interval of the water collection wells can be set according to the actual situation. Generally, arranging water collection wells at intervals of 20-30m can meet the drainage needs.

[0038] like Figure 1 and Figure 2 As shown, the old road area is also equipped with a protective component. One side of the protective component is adjacent to the widening area, and the other side is adjacent to the temporary drainage ditch 8. The protective component is used to prevent vehicles in the widening area from running out onto the old road area that has not been completed.

[0039] Preferably, the protective component includes a temporary guardrail base 9 and a temporary guardrail 10. The temporary guardrail base 9 is disposed on the old road area (preferably fixed to the old road by expansion bolts), and one side of it is adjacent to the widening area, and the other side of it is adjacent to the temporary drainage ditch 8. The temporary guardrail 10 is disposed on the temporary guardrail base 9.

[0040] Preferably, both the temporary guardrail base 9 and the water collection well 3 are prefabricated components. Using prefabricated components can greatly improve the efficiency and convenience of construction and reduce the impact of construction on traffic.

[0041] The effect of applying the technical solution of this embodiment is:

[0042] The technical solution of this embodiment has the advantages of rapid construction, eco-friendliness, high seepage prevention efficiency, and cost saving. Through integrated design, it realizes the coordinated operation of temporary drainage structure and traffic safety protection facilities, which not only ensures the drainage needs during the construction period, but also avoids damage to the existing structure. It has significant economic benefits and promotion value, and is particularly suitable for the drainage of water accumulation at the junction of the old road and the widening area under the raised section.

[0043] The technical solution of this embodiment solves the drainage problem caused by temporary road surface elevation differences during traffic maintenance. By setting temporary drainage channels in the asphalt concrete surface layer of the old road area and controlling the depth of the temporary drainage channels to be less than the thickness of the asphalt concrete surface layer of the old road area, a certain thickness of the asphalt concrete surface layer of the old road area can be reserved as a waterproof layer to block rainwater infiltration and ensure road safety and structural stability during construction. At the same time, the drainage pipes are buried in the widened area, which does not require major modifications to the existing old road structure and reduces damage to the existing old road structure.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A temporary drainage structure utilizing the existing road surface in a widened elevated section of a highway, wherein the existing road section and the widened section of the highway are set up in parallel, and the road surface of the widened section is higher than that of the existing road section, characterized in that: A temporary drainage ditch (8) is set up along the length of the road near the widening area of ​​the old road area. The depth of the temporary drainage ditch (8) is less than the thickness of the asphalt concrete surface layer (1) of the old road area. The upper end of the temporary drainage ditch (8) is flush with the upper surface of the asphalt concrete surface layer (1) of the old road area. Multiple water collection wells (3) are provided at intervals along the length of the temporary drainage ditch (8). The water collection wells (3) are located below the temporary drainage ditch (8) and the two are connected to each other. The lower part of the water collection well (3) is connected to the drainage pipe (4).

2. The temporary drainage structure of claim 1, wherein, The depth of the temporary drainage ditch (8) is 2-8 cm less than the thickness of the asphalt concrete surface layer (1) in the old road area.

3. The temporary drainage structure of claim 1, wherein, The longitudinal slope of the temporary drainage ditch (8) is consistent with the road surface slope of the old road area.

4. The temporary drainage structure of claim 1, wherein, The drainage pipe (4) is buried in the widened area, and the drainage pipe (4) is set along the road width direction and extends to the outside of the road shoulder of the widened area.

5. The temporary drainage structure of claim 4, wherein, The slope of the drain pipe (4) is greater than or equal to 2%.

6. The temporary drainage structure of claim 4, wherein, A gravel filter layer is installed at the outlet (5) of the drain pipe (4).

7. The temporary drainage structure of claim 4, wherein, The top of the water collection well (3) is equipped with a permeable grid.

8. The temporary drainage structure according to any one of claims 1 to 7, wherein, The old road area is also equipped with a protective component, one side of which is adjacent to the widened area and the other side is adjacent to the temporary drainage ditch (8).

9. The temporary drainage structure of claim 8, wherein, The protective components include a temporary guardrail base (9) and a temporary guardrail (10). The temporary guardrail base (9) is located on the old road area, with one side adjacent to the widening area and the other side adjacent to the temporary drainage ditch (8). The temporary guardrail (10) is located on the temporary guardrail base (9).

10. The temporary drainage structure of claim 9, wherein, Both the temporary guardrail base (9) and the water collection well (3) are prefabricated components.

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