A central median pavement drainage structure for an ultra-high cut curved section

Abstract

The utility model discloses a central median strip pavement drainage structure for superhigh excavation curved section, including outer, inner lane, central median strip and inner, outer drainage side ditch, the road height of outer lane to inner lane is gently reduced, be provided with two rows of anti -collision retaining wall by the crash barrier of anti -collision of central median strip, characterized in that: the lower part of crash barrier is provided with the flow guide gap, and the flow guide gap on the crash barrier in two rows of anti -collision retaining wall is aligned, and the flow guide gap of crash barrier is fixed with the groove type buckle, and the lower portion of groove type buckle forms the drainage channel, and the surface water on outer lane flows to inner lane through the drainage channel and flows into the inner drainage side ditch. The utility model discloses a central median strip pavement drainage structure, solved the existing superhigh excavation curved section and set up the problem of central median strip concrete pavement drainage, and this pavement drainage structure drainage mode is simple, direct, convenient construction, and the problem of highway drainage design has been solved.

Description

Technical Field

[0001] This utility model relates to a road drainage structure, and more specifically, to a road drainage structure for the central median strip of an ultra-high excavation curve section. Background Technology

[0002] In the construction of mountain highways, in order to ensure that the horizontal and vertical alignment indicators of the route meet the standards, it is necessary to excavate the mountain to form cut sections. Given that the alignment of mountain highways is constrained by the terrain, cut sections often coincide with curves, forming cut curves. According to highway route design specifications, curves need to be equipped with superelevation, using a cross slope where the outer side is higher than the inner side, to balance the centrifugal force generated by vehicles and ensure driving safety.

[0003] Due to terrain and structural limitations, underground drainage systems cannot be installed on cut curves. Surface water must flow from the superelevation side to the non-superelevation side before being discharged. Poor drainage leads to water accumulation on the road surface, a common problem on cut curves. Water accumulation negatively impacts driving safety, easily causing vehicles to skid or veer during turns. Therefore, this paper proposes a median drainage structure suitable for superelevation cut curves. This structure solves the drainage problem of superelevation cut curves with existing concrete guardrails in the median, enabling rapid drainage of surface water to the side ditches and ensuring smooth drainage. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned technical problems, this utility model provides a drainage structure for the central median strip of ultra-high excavation curves.

[0005] This utility model discloses a road drainage structure for the central median strip of ultra-high excavated curved sections, comprising an outer lane, an inner lane, a central median strip, an outer drainage ditch, and an inner drainage ditch. The central median strip is located between the outer and inner lanes. The outer and inner drainage ditches are located outside the outer and inner lanes, respectively, with a gradual decrease in road height from the outer to the inner lane. Two rows of crash barriers are installed on the central median strip, each row consisting of adjacent crash barriers. The key feature is that the lower part of the crash barriers has a flow guide notch, and the flow guide notches on the crash barriers in the two rows of crash barriers are aligned. A grooved plate is fixed in the flow guide notch of the crash barrier, with the opening of the grooved plate facing downwards. A drainage channel is formed below the grooved plate, and surface water on the outer lane flows through the drainage channel to the inner lane, and surface water on the inner lane flows into the inner drainage ditch.

[0006] The present invention relates to a drainage structure for the central median strip of an ultra-high excavation curve section. The guide gaps are located at both ends of the lower part. The cross-sectional shape of the guide gaps is a quarter circle. The grooved buckle is installed in the guide gaps of two adjacent anti-collision blocks. The cross-section of the grooved buckle is semi-circular.

[0007] The present invention relates to a drainage structure for the central median strip of an ultra-high excavation curve section. The structure has three grooved fasteners at the same position in the road width direction. The three grooved fasteners at the same position are arranged in a manner with two at both ends and one in the middle. The grooved fasteners at both ends are located in the flow guide gaps in the crash barriers. The grooved fastener in the middle is connected to the grooved fasteners at both ends. The outer periphery and end of the grooved fastener in the middle are filled with a sealing mortar layer.

[0008] The present invention relates to a drainage structure for the central median strip of an ultra-high excavation curve section. The anti-collision block is composed of a precast shell and cast-in-place concrete poured into the precast shell. The cross-section of the precast shell is horseshoe-shaped, and multiple pouring ports are provided at the upper end of the precast shell.

[0009] This utility model discloses a drainage structure for the central median strip of a curved section of an ultra-high excavation road. The outer and inner driving lanes are provided with a surface layer, a base layer and a subbase layer from top to bottom. A concrete cushion layer is provided on the central median strip, which is located above the base layer. The crash barriers are placed on the concrete cushion layer, and a support plate is provided between the two rows of crash barriers to limit and fix them.

[0010] The beneficial effects of this utility model are as follows: The drainage structure for the central median strip of ultra-high excavated curved sections is composed of an outer drainage ditch, an outer driving lane, a central median strip, an inner driving lane, and an inner drainage ditch arranged sequentially from the outside to the inside. Two rows of crash barriers are installed in the central median strip. The crash barriers are composed of adjacent crash piers arranged sequentially. A flow guide notch is provided at the bottom of each crash pier, and a grooved plate is installed in the flow guide notch. Below the grooved plate is a drainage channel. In this way, due to the high pressure of the outer driving lane on the inner driving lane, surface water on the outer driving lane will flow through the drainage channel below the grooved plate to the inner driving lane, and then collect in the inner drainage ditch for discharge. This solves the problem of drainage of the concrete pavement in the central median strip of existing ultra-high excavated curved sections. This road drainage structure has a simple, direct, and convenient drainage method, and is of great engineering significance for solving highway drainage design problems.

[0011] Furthermore, three grooved buckles are installed at the same position along the width of the road. The grooved buckles at both ends are installed in the drainage gaps of the crash barriers in the two crash walls, and the grooved buckle in the middle is connected to the grooved buckles at both ends. In this way, when the drainage channel becomes blocked, the grooved buckle in the middle can be removed to facilitate the cleaning of the drainage channel. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the central median road surface drainage structure of this utility model; Figure 2 This is a front view of the anti-collision pier in this utility model; Figure 3 This is a left view of the anti-collision pier in this utility model; Figure 4 This is a right view of the anti-collision pier in this utility model; Figure 5 This is a top view of the anti-collision pier in this utility model; Figure 6 for Figure 5 Sectional view of section AA; Figure 7 This is a schematic diagram of the structure of two adjacent anti-collision blocks cooperating in this utility model; Figure 8 This is a structural view of the central dividing strip in this utility model; Figure 9 This is a partial cross-sectional view of the central dividing strip in this utility model; Figure 10 This is a schematic diagram of three grooved buckles that fit together in the same width direction in this utility model.

[0013] In the diagram: 1 Outer lane, 2 Inner lane, 3 Central divider, 4 Crash barrier, 5 External drainage ditch, 6 Internal drainage ditch, 7 Surface layer, 8 Base layer, 9 Subbase layer, 10 Flow direction, 11 Outer hillside, 12 Inner hillside, 13 Hillside before excavation, 14 Guardrail, 15 Diversion gap, 16 Precast shell, 17 Cast-in-place concrete, 18 Pouring port, 19 Groove cladding, 20 Drainage channel, 21 Concrete cushion layer, 22 Support plate, 23 Sealing mortar layer, 24 Internal reinforcing steel. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] like Figure 1 The diagram shows a schematic representation of the central median drainage structure of this invention. It consists of an outer lane 1, an inner lane 2, a central median 3, an outer drainage ditch 5, and an inner drainage ditch 6. The outer lane 1 and inner lane 2 are formed through superelevation excavation. Figure 1The road was formed by excavating the hillside 13 before the excavation. Because it was formed by excavation, drainage pipes could not be installed at the bottom of the road. The outer lane 1 and the inner lane 2 are located on a curve. The outer lane 1 is on the side closer to the outer hillside 11, and the inner lane 2 is on the side closer to the inner hillside 12. The road surface height gradually decreases from the outer lane 1 to the inner lane 2 to resist the centrifugal force of vehicles driving on the curve. The central divider 3 is located between the outer lane 1 and the inner lane 2. The outer drainage ditch 5 and the inner drainage ditch 6 are located on the outside of the outer lane 1 and the inner lane 2, respectively, for drainage purposes.

[0016] Because it is a curved section, the road surface height gradually decreases from the outer lane 1 to the inner lane 2. Therefore, the surface water on the outer lane 1 is allowed to flow onto the inner lane 2 and then into the inner drainage ditch 6 for drainage.

[0017] Two rows of crash barriers are installed in the central median strip 3, spaced a certain distance apart. Each row of crash barriers consists of several adjacent crash piers 4. For example... Figures 2 to 5 As shown, the front view, left view, right view, and top view of the crash barrier 4 are given respectively. Figure 6 Given Figure 5 Sectional view of section AA. Figure 7 A schematic diagram of the structure of two adjacent crash barriers in this utility model is provided. The cross-section of the crash barrier 4 is horseshoe-shaped, and a flow guide notch 15 is provided at the bottom of the crash barrier 4. The flow guide notches 15 on the crash barriers 4 in the two rows of crash barriers are aligned. A grooved buckle plate 19 is provided in the road notch 15 of the crash barrier 4. The grooved buckle plate 19 is set in the form of an opening facing downwards, and a drainage channel 20 is formed below the grooved buckle plate 19. In this way, the drainage channel 20 realizes the connection between the upper part of the outer lane 1 and the upper part of the inner lane 2.

[0018] In this way, when rainfall causes water to form on the outer lane 1 and the inner lane 2, the water flows from the outer lane 1 into the drainage channel 20 under its own gravity, then flows through the drainage channel 20 into the inner lane 2, and finally flows into the inner drainage ditch 6 for discharge. This method of drainage through the road surface layer solves the problem of drainage of the concrete pavement in the central median strip of existing ultra-high excavation curve sections.

[0019] There are three channel-shaped buckle plates 19 at the same location along the road width. These three plates are arranged with two at the ends and one in the middle. The end plates are located in the guide gaps 15 between the two rows of crash barriers 4. The middle plate is connected to the end plates. To ensure the seal at the connection, a sealing mortar layer 23 is poured around the perimeter and ends of the middle plate. Figure 10The diagram shows three grooved buckles 19 arranged in the same width direction in this utility model. The three grooved buckles 19 are arranged close to each other. In this way, when the drainage channel 20 is blocked, it is only necessary to remove the middle grooved buckle 19 for cleaning.

[0020] The crash barrier 4 shown consists of a precast shell 16 and cast-in-place concrete 17. The precast shell 16 is a pre-cast shell with multiple pouring ports 18 on its top to allow for concrete pouring. After the precast shell 16 is transported to the site and placed in position, two internal reinforcing bars 24 are fixed inside, the side openings are sealed with formwork, and then concrete is poured.

[0021] like Figure 8 and Figure 9 As shown, a structural view and a partial sectional view of the central divider in this utility model are given respectively. The outer lane 1 and the inner lane 2 are provided with a surface layer 7, a base layer 8 and a subbase layer 9 from top to bottom. A concrete cushion layer 21 is poured on top of the base layer 8 at the location of the central divider 3. The crash barriers 4 are placed on the concrete cushion layer. In order to limit the crash barriers 4 in the two rows of crash barriers, a support plate 22 is provided between the two rows of crash barriers.

Claims

1. A median strip road drainage structure for ultra-high excavation curves, comprising an outer lane (1), an inner lane (2), a median strip (3), an outer drainage ditch (5), and an inner drainage ditch (6), wherein the median strip is located between the outer lane and the inner lane, the outer drainage ditch and the inner drainage ditch are located on the outer side of the outer lane and the inner lane, respectively, and the road height gradually decreases from the outer lane to the inner lane; two rows of crash barriers are provided on the median strip, each row of crash barriers being composed of sequentially adjacent crash piers (4); characterized in that: The lower part of the crash barrier has a flow guide gap (15). The flow guide gaps on the crash barriers in the two rows of crash barriers are aligned. A grooved buckle plate (19) is fixed in the flow guide gap of the crash barrier. The opening of the grooved buckle plate faces downward. A drainage channel (20) is formed below the grooved buckle plate. The surface water on the outer lane flows through the drainage channel to the inner lane. The surface water on the inner lane flows into the inner drainage ditch (6).

2. The drainage structure for the central median strip of an ultra-high excavation curve section according to claim 1, characterized in that: The flow guide gap (15) is opened at both ends of the lower part. The cross-sectional shape of the flow guide gap is a 1 / 4 circle. The grooved buckle plate (19) is set in the flow guide gap of the two adjacent anti-collision piers (4). The cross-section of the grooved buckle plate is a semi-circle.

3. The median strip road surface drainage structure for ultra-high excavation curves according to claim 1 or 2, characterized in that: The number of grooved buckles (19) at the same position in the road width direction is three. The three grooved buckles at the same position are arranged in the form of two at both ends and one in the middle. The grooved buckles at both ends are located in the guide gap (15) in the anti-collision block (4). The grooved buckle in the middle is connected to the grooved buckles at both ends. The outer periphery and end of the grooved buckle in the middle are filled with a sealing mortar layer (23).

4. The drainage structure for the central median strip of an ultra-high cut curve section according to claim 1 or 2, characterized in that: The crash barrier (4) is composed of a precast shell (16) and cast-in-place concrete (17) poured into the precast shell. The cross-section of the precast shell is horseshoe-shaped, and multiple pouring ports (18) are opened at the upper end of the precast shell.

5. The median strip road surface drainage structure for ultra-high excavation curves according to claim 1 or 2, characterized in that: The outer lane (1) and the inner lane (2) are provided with a surface layer (7), a base layer (8) and a subbase layer (9) from top to bottom. A concrete cushion layer (21) is provided on the central divider (3). The concrete cushion layer is located above the base layer. The crash barriers (4) are placed on the concrete cushion layer. A support plate (22) is provided between the two rows of crash barriers to limit and fix them.

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