Double-sided widening easement structure, road section and method for small-radius curve road section

Abstract

The application provides a double-side widening transition structure of a small-radius curve road section, which comprises the following steps: setting a linear smooth widening soil shoulder edge line and a widening driving lane edge line on the inner and outer sides of the original soil shoulder edge line and the original driving lane edge line of an original road, so that unilateral high-slope excavation and high-fill protection work and the amount of demolition can be effectively reduced during construction; the double-side widening transition structure comprises the double-side widening transition structure, which can better adapt to small-radius curve roads and regions with many buildings in urban centers, and is more conducive to driving safety and comfort; a double-side widening method is used to obtain the double-side widening transition structure. The double-side widening transition structure, the road section and the method of the small-radius curve road section are used to solve the problems of large engineering investment scale, large project construction difficulty and unguaranteed construction quality caused by the widening of the inner side of the small-radius curve road in the prior art.

Description

Technical Field

[0001] This application relates to the field of road widening, and in particular to a double-sided widening and mitigation structure, a double-sided widening structure, and a method for a small-radius curved road section. Background Technology

[0002] With the rapid development of infrastructure such as transportation and water conservancy, more and more mountainous, hilly, and heavily built-up areas are constructing roads with small-radius curves. To ensure smooth and safe driving when vehicles turn at these curves, widening is necessary. However, if existing standards are followed and the inner side is widened, construction would involve high fills and deep cuts, environmental damage, and increased land occupation, earthwork volume, and building demolition. This would increase the investment in road construction projects, raise construction difficulty, and compromise construction quality, potentially even affecting the feasibility of the project. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a wiring structure and method for widening small-radius curved roads, in order to solve the problems of large engineering investment, high project construction difficulty and inability to guarantee construction quality caused by widening small-radius curved roads from the inside in the prior art.

[0004] To achieve the above and other related objectives, the first aspect of this application provides a double-sided widening and easing structure for small-radius curved road sections, used to widen small-radius curved road sections of original roads. The original road includes an original road centerline, two original earthen shoulder edge lines symmetrically positioned on the outer side of the original road and about the road centerline, and two original carriageway edge lines symmetrically positioned on the inner side of the original road and about the road centerline. The double-sided widening and easing structure includes: a widened road centerline, which coincides with the original road centerline; and two widened earthen shoulder edge lines, symmetrically positioned about the widened road centerline, with the straight-out and easing points of the widened earthen shoulder edge lines coinciding with the straight-out and easing points of the corresponding original earthen shoulder edge lines of the small-radius curved road section of the original road. The widening value of the edge line of the widened earth shoulder relative to the original earth shoulder edge line increases proportionally from zero at the straight-to-curve point to half the widening value at the curve point of the widened earth shoulder edge line. The total widening value of the edge lines of the widened earth shoulder at the curve points of both sides is the full widening value. Two widened lane edge lines are symmetrically arranged about the center line of the widened road, and the straight-to-curve points of the widened lane edge lines coincide with the straight-to-curve points of the original lane edge lines corresponding to the small-radius curve sections of the original road. The widening value of the edge line of the widened lane on one side relative to the original lane edge line increases proportionally from zero at the straight-to-curve point to half the widening value at the curve point of the widened lane edge line. The total widening value of the edge lines of the widened lane on both sides at the curve points is the full widening value.

[0005] In some embodiments of the first aspect of this application, the distance between the two original driving edge lines of the original road is b, the distance between the original shoulder edge line and the original driving lane edge line on one side is c, the half-widening value is a, then the width of the original road is b+2c, and the width of the widened road is 2a+b+2c.

[0006] In some embodiments of the first aspect of this application, the distance between the edge line of the widened earth shoulder and the edge line of the widened driving lane on the same side is c.

[0007] In some embodiments of the first aspect of this application, the distance between the corresponding gentle curve points on the two edges of the widened earth shoulder is 2a+b+2c.

[0008] In some embodiments of the first aspect of this application, the distance between the corresponding transition points on the two widened lane edge lines is 2a+b.

[0009] In some embodiments of the first aspect of this application, the total length of the widened shoulder edge line in the widened transition section between the straight-to-curve point and the rounded point is L1. Then, the widening value at the straight-to-curve point L1 is a×f(l1 / L1), where f can be a linear function or a higher-order parabolic function.

[0010] In some embodiments of the first aspect of this application, the total length of the widened lane edge line in the widened transition section between the straight-to-curve point and the rounded-off point is L2. Then, the widening value at the straight-to-curve point of L2 is a×f(l2 / L2), where f can be a linear function or a higher-order parabolic function.

[0011] In some embodiments of the first aspect of this application, the double-sided widening and mitigation structure includes: a roadbed, a road surface, road signs, and a protective structure.

[0012] To achieve the above and other related objectives, a second aspect of this application provides a double-sided widening transition section, the double-sided widening transition section including a straight section and any of the aforementioned double-sided widening transition structures connected to the straight section.

[0013] To achieve the above and other related objectives, a third aspect of this application provides a method for widening a small-radius curved road segment on both sides. The method includes: using the original road centerline as the widened road centerline; symmetrically setting two widened earth shoulder edge lines based on the widened road centerline between the straight-to-curve point and the curve point of the original earth shoulder edge line corresponding to the small-radius curved road segment of the original road; wherein the straight-to-curve point of the widened earth shoulder edge line coincides with the straight-to-curve point of the original earth shoulder edge line corresponding to the small-radius curved road segment of the original road, and the widening value of the widened earth shoulder edge line on one side relative to the original earth shoulder edge line increases proportionally from zero at the straight-to-curve point to the curve point of the widened earth shoulder edge line. The half-widening value at the point, and the total widening value of the widened shoulder edge lines on both sides at the transition point, constitute the full widening value; two widened lane edge lines are symmetrically set based on the centerline of the widened road between the straight and transition points and the transition point of the original lane edge line corresponding to the small radius curve segment of the original road; wherein, the straight and transition points of the widened lane edge lines coincide with the straight and transition points of the original lane edge line corresponding to the small radius curve segment of the original road, and the widening value of the widened lane edge line on one side relative to the original lane edge line increases proportionally from zero at the straight and transition point to half-widening value at the transition point of the widened lane edge line, and the total widening value of the widened lane edge lines on both sides at the transition point constitutes the full widening value.

[0014] As described above, this application provides a double-sided widening and mitigation structure for small-radius curved road sections. By setting linear and smooth widened earth shoulder edges and widened driving lane edges on both the inner and outer sides of the original road shoulder edge and driving lane edge, respectively, construction can be effectively reduced by minimizing excavation of high slopes on one side, high embankment protection work, and demolition volume. The double-sided widening and mitigation road section provided by this application includes the aforementioned double-sided widening and mitigation structure, which is better adapted to small-radius curved roads and areas with many buildings in urban centers, thus improving driving safety and comfort. The double-sided widening method provided by this application is used to obtain the aforementioned double-sided widening and mitigation structure. The double-sided widening and mitigation structure, road section, and method for small-radius curved road sections provided by this application solve the problems of large engineering investment, high project construction difficulty, and inability to guarantee construction quality caused by widening small-radius curved roads from the inner side in the prior art. Attached Figure Description

[0015] Figure 1 The diagram shown is a schematic diagram of a double-sided widening and easing structure for a small-radius curved road section in one embodiment of this application.

[0016] Figure 2 The diagram shown is a schematic representation of a widened and gentler road section on both sides in one embodiment of this application.

[0017] Figure 3 The diagram shown is a flowchart illustrating a method for widening small-radius curved road sections on both sides according to an embodiment of this application.

[0018] Component designation explanation

[0019] 1. Original road

[0020] 11 Original road centerline

[0021] 12. Edge line of the original dirt shoulder

[0022] 13. Original lane edge line

[0023] 2. Widened and softened structure on both sides

[0024] 21. Widen the road centerline

[0025] 22. Widen the edge line of the dirt road shoulder

[0026] 23. Widen the edge line of the driving lane.

[0027] 3 Straight road sections Detailed Implementation

[0028] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0029] It should be noted that in the following description, reference is made to the accompanying drawings, which illustrate several embodiments of this application. It should be understood that other embodiments may also be used, and changes in mechanical composition, structure, electrical system, and operation may be made without departing from the spirit and scope of this application. The following detailed description should not be considered limiting, and the scope of the embodiments of this application is defined only by the claims of the published patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. Spatially related terms, such as “upper,” “lower,” “left,” “right,” “below,” “below,” “lower part,” “above,” “upper part,” etc., may be used herein to illustrate the relationship between one element or feature shown in the figures and another element or feature.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," and "holding" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, operation, element, component, item, kind, and / or group, but do not preclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition arise only when combinations of elements, functions, or operations are inherently mutually exclusive in some manner.

[0032] To address the problems mentioned above, this invention provides a wiring structure and method for widening small-radius curved roads, aiming to solve the problems of large engineering investment, high construction difficulty, and unreliable construction quality caused by widening small-radius curved roads from the inside in existing technologies. Meanwhile, to make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0033] like Figure 1 The diagram illustrates a double-sided widening and easing structure 2 for a small-radius curved road segment according to an embodiment of the present invention. In this embodiment, the double-sided widening and easing structure 2 is used to widen the small-radius curved road segment of the original road 1. The original road 1 includes an original road centerline 11, two original earthen shoulder edge lines 12 located on the outer side of the original road 1 and symmetrical about the road centerline 11, and two original carriageway edge lines 13 located on the inner side of the original road 1 and symmetrical about the road centerline 11. The double-sided widening and easing structure 2 includes:

[0034] The road centerline 21 is widened, and the widened road centerline 21 coincides with the original road centerline 11.

[0035] Two widened earth shoulder edge lines 22 are symmetrically arranged about the widened road centerline 21. The straight and gentle points of the widened earth shoulder edge lines 22 coincide with the straight and gentle points of the original earth shoulder edge lines 12 corresponding to the small radius curve section of the original road 1. The widening value of the widened earth shoulder edge lines 22 on one side compared to the original earth shoulder edge lines 12 is increased proportionally from zero at the straight and gentle point to half the widening value at the gentle round point of the widened earth shoulder edge lines 22. The total widening value of the widened earth shoulder edge lines 22 on both sides at the gentle round point is the full widening value.

[0036] Two widened lane edge lines 23 are symmetrically arranged about the widened road centerline 21. The straight and gentle points of the widened lane edge lines 23 coincide with the straight and gentle points of the original lane edge lines 13 corresponding to the small radius curves of the original road 1. The widening value of the widened lane edge line 23 on one side compared to the original lane edge line 13 increases proportionally from zero at the straight and gentle point to half the widening value at the gentle point of the widened lane edge line 23. The total widening value of the widened lane edge lines 23 on both sides at the gentle point is the full widening value.

[0037] In this embodiment, the widened earth shoulder edge line 22 and the original earth shoulder edge line 12 on the same side respectively form two earth shoulder widening buffer zones, and the widened carriageway edge line 23 and the original carriageway edge line 13 on the same side respectively form two carriageway widening buffer zones. The purpose of this design in this embodiment is to achieve a gradual widening of small-radius curved road sections on both sides through the earth shoulder widening buffer zones and carriageway widening buffer zones on both the inner and outer sides, avoiding abrupt changes that could affect driving safety. Furthermore, based on this gradual widening structure, the road widening construction can reduce the excavation of high slopes on one side and the protection work of high embankments, reduce demolition work, and is highly operable.

[0038] In one embodiment, such as Figure 1 As shown, the distance between the two original driving edge lines 13 of the original road 1 is b, the distance between the original shoulder edge line 12 and the original driving lane edge line 13 on one side is c, and the half-widening value is a. Therefore, the width of the original road 1 is b+2c, and the width of the widened road is 2a+b+2c.

[0039] Since both the widened earthen shoulder edge line 22 and the widened driving lane edge line 23 adopt a gradual widening method, the distance between the widened earthen shoulder edge line 22 and the widened driving lane edge line 23 on the same side is always c, which is consistent with the distance between the original earthen shoulder edge line 12 and the original driving lane edge line 13 on the same side of the original road 1. This ensures that the edge line changes are natural and smooth, which can better adapt to small-radius curved roads in mountainous areas, hilly areas, water conservancy and hydropower plant areas, and areas with many buildings in the city center, and is more conducive to driving safety and comfort.

[0040] At this time, as Figure 1 As shown, the distance between the corresponding gentle curve points on the two widened earth shoulder edge lines 22 is 2a+b+2c, and the distance between the corresponding gentle curve points on the two widened carriageway edge lines 23 is 2a+b.

[0041] In one embodiment, the gradual widening method adopted for the widened shoulder edge line 22 and the widened carriageway edge line 23 includes: calculating a proportional widening value based on the full length and half-widening value of the widening transition segment between the corresponding straight transition point and the transition circle point. The specific calculation method is as follows:

[0042] The widened shoulder edge line 22 has a total length of L1 in the widened transition section between the straight point and the rounded point. Then, the widening value at the straight point is l1 is a×f(l1 / L1).

[0043] The widened lane edge line 23 has a total length of L2 in the widened transition section between the straight-to-curve point and the rounded-off point. Therefore, the widening value at the straight-to-curve point of L2 is a×f(l2 / L2).

[0044] In this embodiment, the widened shoulder edge line 22 and the widened lane edge line 23 are configured with superelevation transition sections by rotating around the original road centerline 11 as the axis of rotation, using the lane center as the rotation point. L1 and L2 can be values ​​with the same length as the superelevation transition section. In a specific embodiment, the proportional widening value can be calculated using a linear or higher-order parabolic method, that is, the function f in the calculation formula can be a linear function or a higher-order parabolic function.

[0045] The purpose of this design in this embodiment of the invention is to ensure that the double-sided widening and mitigation structure 2 can save investment and be environmentally friendly during construction, while meeting the functions of widening the road and ensuring driving safety, based on the actual site conditions.

[0046] In one embodiment, the double-sided widening and mitigation structure 2 includes: a roadbed, a road surface, road signs, and a protective structure.

[0047] The roadbed, pavement, road signs, and protective structures meet the technical standards for road design and construction, including horizontal alignment, vertical profile, cross section, cross slope, and sight distance. Based on the widening and alignment structure of the small-radius curved road and considering geological conditions, the road widening construction project involves foundation treatment, excavation slope treatment, and the addition of protective walls and retaining structures along the widened inner and outer sides. This, along with the construction of the roadbed, pavement structure, and the installation of signs, markings, and warning signs, effectively controls the scale of investment and construction difficulty, ensuring project quality and improving the feasibility of the entire road widening project.

[0048] like Figure 2 The diagram illustrates a double-sided widening and easing road section according to an embodiment of the present invention. The double-sided widening and easing road section in this embodiment includes: a straight road section 3 and a double-sided widening and easing structure 2 as described above, connected to the straight road section 3.

[0049] like Figure 3 The diagram illustrates a flowchart of a method for widening a small-radius curved road segment on both sides, according to an embodiment of the present invention. The method for widening both sides in this embodiment includes:

[0050] Step S1: Use the original centerline 11 of the original road 1 as the centerline 21 of the widened road.

[0051] Step S2: Two widened earth shoulder edge lines 22 are symmetrically set between the straight and gentle points and the gentle round points of the original earth shoulder edge line 12 corresponding to the small radius curve section of the original road 1, based on the widened road center line 21.

[0052] The straight and gentle points of the widened earth shoulder edge line 22 coincide with the straight and gentle points of the original earth shoulder edge line 12 corresponding to the small radius curve section of the original road 1. The widening value of the widened earth shoulder edge line 22 on one side compared to the original earth shoulder edge line 12 increases proportionally from zero at the straight and gentle point to half the widening value at the gentle round point of the widened earth shoulder edge line 22. The total widening value of the widened earth shoulder edge lines 22 on both sides at the gentle round point is the full widening value.

[0053] Step S3: On the small-radius curve section of the original road 1, two widened lane edge lines 23 are symmetrically set between the straight and gentle points and the gentle circle points of the original lane edge line 13, based on the widened road centerline 21.

[0054] The straight-out and turning points of the widened lane edge line 23 coincide with the straight-out and turning points of the original lane edge line 13 corresponding to the small-radius curve section of the original road 1. The widening value of the widened lane edge line 23 on one side compared to the original lane edge line 13 increases proportionally from zero at the straight-out and turning points to half the widening value at the turning point of the widened lane edge line 23. The total widening value of the widened lane edge lines 23 on both sides at the turning point is the full widening value.

[0055] The double-sided widening method provided in this embodiment of the invention is to obtain the double-sided widening transition structure 2 described in any one of the claims to assist in the widening construction of small-radius curved road sections, ensuring project quality and reducing work such as single-sided high slope excavation, high embankment protection, and demolition during the project. It is highly operable and more suitable for small-radius curved roads, ensuring smooth alignment and driving comfort and safety. Furthermore, the double-sided widening method for small-radius curved road sections provided in the above embodiments and the double-sided widening transition structure embodiment for small-radius curved road sections belong to the same concept. The specific implementation process is detailed in the double-sided widening transition structure embodiment, and will not be repeated here.

[0056] In summary, this application provides a double-sided widening and mitigation structure for small-radius curved road sections. By setting linearly smooth widened earth shoulder edges and widened driving lane edges on both the inner and outer sides of the original road shoulder edge and driving lane edge, respectively, construction can be effectively reduced by minimizing the excavation of high slopes on one side, the construction of high embankments, and the amount of demolition. The double-sided widening and mitigation road section provided in this application, including the aforementioned double-sided widening and mitigation structure, is better suited to small-radius curved roads and areas with many buildings in urban centers, thus improving driving safety and comfort. The double-sided widening method provided in this application is used to obtain the aforementioned double-sided widening and mitigation structure. The double-sided widening and mitigation structure, road section, and method provided in this application address the problems of large engineering investment, high project construction difficulty, and unreliable construction quality caused by widening small-radius curved roads from the inner side in existing technologies. Therefore, this application effectively overcomes the various shortcomings of existing technologies and has high industrial application value.

[0057] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A double-sided widening and easing structure (2) for a small-radius curved road section, used to widen a small-radius curved road section of an original road (1), wherein the original road (1) includes an original road centerline (11), two original earthen road shoulder edge lines (12) set on the outer side of the original road and symmetrical about the road centerline (11), and two original carriageway edge lines (13) set on the inner side of the original road and symmetrical about the road centerline (11), wherein the double-sided widening and easing structure (2) is characterized in that, include: The road centerline (21) is widened, and the widened road centerline (21) coincides with the original road centerline (11); Two widened earth shoulder edge lines (22) are symmetrically arranged about the widened road centerline (21). The straight and gentle points of the widened earth shoulder edge lines (22) coincide with the straight and gentle points of the original earth shoulder edge lines (12) corresponding to the small radius curve section of the original road (1). The widening value of the widened earth shoulder edge lines (22) on one side compared to the original earth shoulder edge lines (12) increases proportionally from zero at the straight and gentle point to half the widening value at the gentle round point of the widened earth shoulder edge lines (22). The total widening value of the widened earth shoulder edge lines (22) on both sides at the gentle round point is the full widening value. Two widened lane edge lines (23) are symmetrically arranged about the widened road centerline (21). The straight and gentle points of the widened lane edge lines (23) coincide with the straight and gentle points of the original lane edge lines (13) corresponding to the small radius curve section of the original road (1). The widening value of the widened lane edge lines (23) on one side compared to the original lane edge lines (13) is increased proportionally from zero at the straight and gentle point to half the widening value at the gentle point of the widened lane edge lines (23). The total widening value of the widened lane edge lines (23) on both sides at the gentle point is the full widening value.

2. The double-sided widened and softened structure (2) according to claim 1, characterized in that, The distance between the two original driving edge lines (13) of the original road (1) is b, the distance between the original shoulder edge line (12) and the original driving lane edge line (13) on one side is c, the half-widening value is a, then the width of the original road (1) is b+2c, and the width of the widened road is 2a+b+2c.

3. The double-sided widened and softened structure (2) according to claim 2, characterized in that, The distance between the edge line (22) of the widened earth shoulder and the edge line (23) of the widened driving lane on the same side is c.

4. The double-sided widened and softened structure (2) according to claim 2, characterized in that, The distance between the corresponding gentle rounded points on the two widened earth shoulder edge lines (22) is 2a+b+2c.

5. The double-sided widened and softened structure (2) according to claim 2, characterized in that, The distance between the corresponding gentle circles on the two widened lane edge lines (23) is 2a+b.

6. The double-sided widened and softened structure (2) according to claim 2, characterized in that, The widened shoulder edge line (22) has a total length of L1 in the widened transition section between the straight and gentle point and the gentle circle point. Then, the widening value at the straight and gentle point is l1, where f can be a linear function or a higher-order parabolic function.

7. The double-sided widened and softened structure (2) according to claim 2, characterized in that, The widened lane edge line (23) has a total length of L2 in the widened transition section between the straight-to-curve point and the rounded point. The widening value at the straight-to-curve point is a×f(l2 / l2), where f can be a linear function or a higher-order parabolic function.

8. The double-sided widened and softened structure (2) according to claim 1, characterized in that, include: Roadbed, pavement, road signs, and protective structures.

9. A double-sided widened and gentle road section, characterized in that, It includes a straight road segment (3) and a double-sided widening and mitigation structure (2) connected to the straight road segment (3) as described in any one of claims 1 to 8.

10. A method for widening both sides of a small-radius curved road section, characterized in that, include: The original centerline (11) of the original road (1) is used as the centerline (21) of the widened road; Two widened earth shoulder edge lines (22) are symmetrically set between the straight and gentle points and the gentle rounding points of the original earth shoulder edge line (12) corresponding to the small radius curve section of the original road (1), based on the widened road centerline (21); wherein, the straight and gentle points of the widened earth shoulder edge line (22) coincide with the straight and gentle points of the original earth shoulder edge line (12) corresponding to the small radius curve section of the original road (1), and the widening value of the widened earth shoulder edge line (22) on one side compared with the original earth shoulder edge line (12) is increased proportionally from zero at the straight and gentle point to half the widening value at the gentle rounding point of the widened earth shoulder edge line (22), and the total widening value of the widened earth shoulder edge lines (22) on both sides at the gentle rounding point is the full widening value; Two widened lane edge lines (23) are symmetrically set between the straight-out point and the gentle-round point of the original lane edge line (13) corresponding to the small-radius curve segment of the original road (1), based on the widened road centerline (21). The straight-out point of the widened lane edge line (23) coincides with the straight-out point of the original lane edge line (13) corresponding to the small-radius curve segment of the original road (1). The widening value of the widened lane edge line (23) on one side compared to the original lane edge line (13) increases proportionally from zero at the straight-out point to half the widening value at the gentle-round point of the widened lane edge line (23). The total widening value of the widened lane edge lines (23) on both sides at the gentle-round point is the full widening value.

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