CN114592400A - Structure for enhancing road surface drainage capacity by using movable ridge on zero-slope road section and implementation method - Google Patents

Abstract

The invention discloses a structure for enhancing drainage capacity of a movable road ridge for a zero-slope road section and an implementation method, which mainly designs two movable road ridge structures aiming at a zero longitudinal slope road section and a zero transverse slope road section or road sections with smaller transverse slopes and longitudinal slopes, namely: adopting a W-shaped ridge-valley road surface structure on a zero longitudinal slope road section; the road surface structure of the inverted V-shaped ridge-valley road is adopted on the road section with zero cross slope or the road section with smaller cross slope and longitudinal slope. The invention can be applied to the structural design and construction of permeable pavements or impermeable pavements of zero-slope road sections, a ridge-valley structure is arranged on one or more structural layers of the pavements, the composite gradient of the original design is increased, so that better drainage effect is realized, the pavement can be timely drained when the zero-slope road sections in plain areas are subjected to concentrated rainfall, and meanwhile, the drainage capability of the permeable pavements can be effectively enhanced. The invention has the characteristics of simple design and convenient construction, and can effectively solve the problems of accumulated water on the road surface of the zero-slope road section and difficult discharge of interlayer water.

Description

Structure for enhancing road surface drainage capacity by using movable ridge on zero-slope road section and implementation method

Technical Field

The invention belongs to the technical field of permeable pavement structures, and particularly relates to a structure for enhancing drainage capacity of a movable ridge for a zero-slope road section and an implementation method.

Background

In recent years, the rainwater control technology is more and more mature due to the construction of high-grade roads in China, and permeable pavements are more and more popularized and applied. However, extreme weather such as typhoon and heavy rain often occurs in southern plain rainy areas, the rainfall amount greatly exceeds the average level, and roads in plain areas have a plurality of road surface synthetic road sections with small gradient, which is very unfavorable for drainage of concentrated rainfall, thereby having great influence on driving safety.

In the design of permeable pavement, reasonable infiltration and drainage of surface rainwater are important working modes, however, in the existing specification of highway drainage design, the design of permeable pavement structure combination only puts forward requirements on the thickness, structure combination, drainage auxiliary facilities and the like of the drainage pavement surface layer, base layer, subbase layer and other layers, and does not put forward the design requirement of pavement structure for the zero slope road section. A large amount of pavement damage investigation results show that due to the fact that the composite gradient of the zero-slope road section is too small, rainwater on the pavement cannot be timely discharged, long-term accumulated water permeates through pores of the pavement, water damage is generated under the action of driving load, and the pavement is cracked. Consequently, how to promote zero slope road section drainage ability be the problem that needs to solve urgently in the special highway section drainage design of present highway, especially in the bituminous paving that permeates water, surface course water passes through surface course top layer infiltration middle-course surface layer on the pitch that permeates water, can cause ponding infiltration road surface condition that can not in time discharge in zero slope road section, has impeld the emergence of water damage on the contrary, causes negative effects.

Disclosure of Invention

The invention aims to provide a structure for enhancing the drainage capacity of a moving ridge for a zero-slope road section and an implementation method thereof, aiming at the defects of the prior art. The structure and the implementation method can be applied to the structural design and construction of permeable pavements or impermeable pavements of zero-slope road sections, a ridge-valley structure is arranged on one or more structural layers of the pavements, the synthetic gradient of the original design is increased, so that a better drainage effect is realized, the pavement can be drained timely when the zero-slope road sections in plain areas are subjected to concentrated rainfall, and meanwhile, the drainage capacity of the permeable pavements can be effectively enhanced. The invention has the characteristics of simple design and convenient construction, can obviously improve the drainage efficiency of permeable or impermeable road surfaces, has good economy and can effectively solve the problems of accumulated water on the road surface of a zero-slope road section and difficult drainage of interlayer water.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a zero slope road section is with structure that removes spine reinforcing drainage ability, to zero longitudinal gradient highway section and zero cross slope highway section or the less highway section of horizontal, longitudinal slope all design two kinds of moving road ridge structures, promptly: adopting a W-shaped ridge-valley road surface structure on a zero longitudinal slope road section; an inverted V-shaped ridge-valley road surface structure is adopted in a zero cross slope road section or a road section with smaller cross slopes and longitudinal slopes;

the W-shaped ridge-valley pavement structure comprises a first slope surface, a second slope surface, a third slope surface and a fourth slope surface; the first slope surface and the third slope surface are in a downhill direction, and the second slope surface and the fourth slope surface are in an uphill direction;

the inverted V-shaped ridge-valley road surface structure comprises a first ridge line, a first lower slope surface corresponding to the first ridge line, an opposite road surface edge corresponding to a first ridge line end point, an upper slope surface corresponding to a second ridge line, a lower slope surface corresponding to the second ridge line, an opposite road surface edge corresponding to a second ridge line end point, an upper slope surface corresponding to a third ridge line, a lower slope surface corresponding to the third ridge line, an opposite road surface edge corresponding to a third ridge line end point, an upper slope surface corresponding to a tail-end ridge line and a tail-end ridge line.

The invention further discloses that in the W-shaped ridge-valley road surface structure, a valley I is formed between the first slope surface and the second slope surface, a ridge is formed between the second slope surface and the third slope surface, and a valley II is formed between the third slope surface and the fourth slope surface (8), wherein the ridge line and the valley line are both vertical to the driving direction.

The invention further explains that the W-shaped ridge-valley pavement structure is W-shaped along the longitudinal direction, and is provided with a lower surface layer, a middle surface layer and an upper surface layer which are sequentially paved on the original roadbed along the longitudinal direction, and the cross slope is kept unchanged; the upper surface layer is a permeable asphalt concrete surface layer or a impermeable asphalt concrete surface layer; and the middle surface layer and the lower surface layer are both waterproof asphalt concrete surface layers.

The invention further discloses that the ridge-valley structure of the W-shaped ridge-valley pavement structure is arranged on the upper, middle and lower surface layers, or on the upper and middle surface layers, or on the upper surface layer, and is controlled by the elevation of the top surface of the structural layer.

The invention further discloses that the W-shaped ridge-valley road surface structure is suitable for adjusting the road surface structure of the zero longitudinal slope road section, and the length and the number between the ridge line and the valley line can be adjusted according to the length of the zero longitudinal slope road section.

The invention further discloses that in the inverted V-shaped ridge-valley road surface structure, each ridge line is positioned at the position of an oblique diagonal line along the driving direction, the terminal point of the previous ridge line is used as the starting point of the next ridge line, and the directions of the upper slope and the lower slope are perpendicular to the ridge line direction.

Furthermore, the vehicle passes through a first ridge line along the driving direction and is provided with a first downward slope, each subsequent ridge line corresponds to a respective upward slope and a respective downward slope, the downward slope of the previous ridge line is connected with the upward slope of the subsequent ridge line, and the ridge line at the tail end is provided with a tail end upward slope.

The invention further discloses that two sides of the first ridge line are respectively an original road surface and a first lower slope surface corresponding to the first ridge line, and two sides of the tail end ridge line are respectively an upper slope surface and an original road surface corresponding to the tail end ridge line; a valley is formed between the first lower slope surface corresponding to the first ridge line and the upper slope surface corresponding to the second ridge line, a valley is formed between the lower slope surface corresponding to the second ridge line and the upper slope surface corresponding to the third ridge line, and then a valley is sequentially formed between the lower slope surface and the upper slope surface of two adjacent ridge lines.

The invention further discloses that the inverted V-shaped ridge-valley pavement structure is inverted V-shaped along the longitudinal diagonal direction and comprises a lower surface layer, a middle surface layer and an upper surface layer which are sequentially laid on the original roadbed along the longitudinal direction; the upper surface layer is a permeable asphalt concrete surface layer or a impermeable asphalt concrete surface layer; and the middle surface layer and the lower surface layer are both waterproof asphalt concrete surface layers.

The invention further discloses that the ridge-valley structure of the inverted V-shaped ridge-valley pavement structure is arranged on the upper, middle and lower surface layers, or on the upper and middle surface layers, or on the upper surface layer, and is controlled by the elevation of the top surface of the structural layer.

The invention further discloses that the inverted V-shaped ridge-valley road surface structure is suitable for adjusting the road surface structure of the road section with the small cross slope or the small cross slope and the small longitudinal slope, and the length and the number of ridge lines can be adjusted according to the length of the road section with the small cross slope or the small cross slope and the small longitudinal slope.

The invention also provides an implementation method of the structure for enhancing the drainage capacity of the movable ridge for the zero-slope road section, which comprises the following steps:

the implementation method of the W-shaped ridge-valley pavement structure comprises the following steps:

1) determining the longitudinal horizontal lengths of a first slope surface, a second slope surface, a third slope surface and a fourth slope surface and the gradient of each slope surface according to the length of a zero slope road section and the design of an original vertical section;

2) keeping the design elevations of the starting point of the first slope, the starting point of the third slope and the terminal point of the fourth slope unchanged, and calculating and determining the design elevations of the terminal point of the first slope and the terminal point of the third slope according to the design gradient of each slope;

3) when the ridge-valley structures are arranged on the upper, middle and lower surface layers, the thicknesses of the upper surface layer and the middle surface layer are kept to be the same as the original pavement design, the thickness of the lower surface layer is calculated according to the new design elevation, and the thickness of the lower surface layer is adjusted to meet the design elevation after the gradient is adjusted;

when the ridge-valley structure is arranged on the upper surface layer and the middle surface layer, the thickness of the upper surface layer is kept to be the same as that of the original pavement design, and the requirement of the design standard height of the W-shaped ridge-valley pavement structure is met by adjusting the thickness of the middle surface layer;

when the ridge-valley structure is arranged on the upper layer, the requirement of the design standard height of the W-shaped ridge-valley pavement structure is met by adjusting the thickness of the upper layer;

4) the W-shaped ridge-valley pavement structure is controlled by designing elevation, and the cross slope is unchanged, so that the asphalt concrete laying construction steps of each structural layer are consistent with the original pavement construction method, the elevation is adjusted, and each structural layer can be laid layer by layer;

the implementation method of the inverted V-shaped ridge-valley road surface structure comprises the following steps:

1) determining the road section length corresponding to each road ridge line and the number of the road ridge lines required to be set according to the zero-slope road section length and the original horizontal and vertical section design;

2) keeping the design elevation of the ridge line position unchanged, reducing the design elevation of the edge of the opposite road surface at the end point of each ridge line according to the gradient requirement, and forming an oblique gradient perpendicular to the ridge lines, wherein the design elevation of the edge of the opposite road surface corresponding to the end point of the ridge line at the end point is kept unchanged;

3) when the ridge-valley structures are arranged on the upper, middle and lower surface layers, the thicknesses of the upper surface layer and the middle surface layer are kept to be the same as the original pavement design, the thickness of the lower surface layer is calculated according to the new design elevation, and the thickness of the lower surface layer is adjusted to meet the design elevation after the gradient is adjusted;

when the ridge-valley structure is arranged on the upper surface layer and the middle surface layer, the thickness of the upper surface layer is kept to be the same as the original pavement design, the thickness of the middle surface layer is calculated according to the new design elevation, and the design elevation after the gradient is adjusted is met by adjusting the thickness of the middle surface layer;

when the ridge-valley structure is arranged on the upper layer, the thickness of the upper layer is calculated according to the new design elevation, and the design elevation after the gradient is adjusted is met by adjusting the thickness of the upper layer;

4) the inverted V-shaped ridge-valley pavement structure is controlled by designing elevation, so that the asphalt concrete laying construction steps of each structural layer are consistent with the original pavement construction method, the elevation is adjusted, and each structural layer can be laid layer by layer.

The invention has the advantages that:

(1) the economy is good. The slope is adjusted only in the zero slope road section by changing the thickness of the original surface layer, the change range is not large, and the increased manufacturing cost is not much.

(2) The construction is simple. The gradient change is adjusted by controlling the designed elevation, the controlled elevation is only required to be changed during pavement construction, and an additional construction means is not required.

(3) The drainage effect is obvious. The structure of the zero slope road section is changed, the manufacturing slope is beneficial to quickly discharging surface water or interlayer water, and water seepage and retention are avoided to cause water damage. .

Drawings

Fig. 1 is a schematic view of a longitudinal slope surface of a zero longitudinal slope section of a road surface structure adopting a W-shaped ridge-valley road surface according to an embodiment of the present invention.

The symbols in the figures represent: 1. a first slope starting point; 2. a first slope surface; 3. a first slope end point (i.e., valley i); 4. a second slope surface; 5. second slope surface end point (i.e., ridge); 6. a third slope surface; 7. the third slope end point (namely, the road valley II); 8. a fourth slope surface; 9. and a fourth slope end point.

Fig. 2 is a schematic design view of a road surface structure adopting an inverted V-shaped ridge-valley in a zero cross-slope road section according to another embodiment of the present invention.

The symbols in the figures represent: 201. a first ridge line; 202. a first lower slope surface corresponding to the first ridge line; 203. the edge of the opposite road surface corresponding to the end point of the first ridge line; 204. an upper slope surface corresponding to the second ridge line; 205. a second ridge line; 206. a downhill surface corresponding to the second ridge line; 207. the edge of the opposite road surface corresponding to the end point of the second ridge line; 208. an upper slope surface corresponding to the third ridge line; 209. a third ridge line; 210. a downhill surface corresponding to the third ridge line; 211. the edge of the opposite road surface corresponding to the end point of the third ridge line; 212. an upper slope surface corresponding to the ridge line at the tail end; 213. a terminal road ridge line; the direction of the arrow in the figure is the drainage direction.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

Example 1:

the utility model provides a zero slope road section is with structure that removes spine reinforcing drainage ability, mainly be to zero longitudinal gradient highway section and zero cross slope highway section or the less highway section of horizontal, longitudinal gradient all designs two kinds of moving road ridge structures, promptly: a W-shaped road ridge-valley road surface structure is adopted on a zero longitudinal slope section; the road surface structure of the inverted V-shaped ridge-valley road is adopted on the road section with zero cross slope or the road section with smaller cross slope and longitudinal slope.

As shown in fig. 1, the W-shaped ridge-valley road surface structure includes a first slope surface 2, a second slope surface 4, a third slope surface 6 and a fourth slope surface 8; the first slope surface 2 and the third slope surface 6 are in a downhill direction, and the second slope surface 4 and the fourth slope surface 8 are in an uphill direction; the first domatic 2 with form road valley I3 between the domatic 4 of second, form road ridge 5 between the domatic 4 of second and the domatic 6 of third, the domatic 6 of third with form road valley II 7 between the domatic 8 of fourth, wherein, road ridge line and road valley line all are perpendicular to the driving direction.

The W-shaped ridge-valley pavement structure is W-shaped along the longitudinal direction, and is provided with a lower surface layer, a middle surface layer and an upper surface layer which are sequentially paved on the original roadbed along the longitudinal direction, and the cross slope is kept unchanged; the upper surface layer is a permeable asphalt concrete surface layer or a impermeable asphalt concrete surface layer; and the middle surface layer and the lower surface layer are both waterproof asphalt concrete surface layers. The ridge-valley structure of the W-shaped ridge-valley pavement structure is arranged on the upper, middle and lower surface layers, or on the upper and middle surface layers, or on the upper surface layer, and is controlled by the elevation of the top surface of the structural layer.

The W-shaped ridge-valley road surface structure is suitable for adjusting the road surface structure of the zero longitudinal slope road section, and the length and the number between the ridge line and the valley line can be adjusted according to the length of the zero longitudinal slope road section.

The implementation method of the W-shaped ridge-valley pavement structure comprises the following steps:

1) according to the length of the zero slope road section and the design of an original vertical section, determining the longitudinal horizontal length of a first slope surface (2), a second slope surface (4), a third slope surface (6) and a fourth slope surface (8) and the gradient of each slope surface;

2) keeping the design elevations of a first slope surface starting point (1), a third slope surface starting point (5) and a fourth slope surface terminal point (9) unchanged, and calculating and determining the design elevations of the first slope surface terminal point (3) and the third slope surface terminal point (7) according to the design slopes of all slope surfaces;

3) when the ridge-valley structures are arranged on the upper, middle and lower surface layers, the thicknesses of the upper surface layer and the middle surface layer are kept to be the same as the original pavement design, the thickness of the lower surface layer is calculated according to the new design elevation, and the thickness of the lower surface layer is adjusted to meet the design elevation after the gradient is adjusted;

when the ridge-valley structure is arranged on the upper surface layer and the middle surface layer, the thickness of the upper surface layer is kept to be the same as that of the original pavement design, and the requirement of the design standard height of the W-shaped ridge-valley pavement structure is met by adjusting the thickness of the middle surface layer;

when the ridge-valley structure is arranged on the upper layer, the requirement of the design standard height of the W-shaped ridge-valley pavement structure is met by adjusting the thickness of the upper layer;

4) the W-shaped ridge-valley pavement structure is controlled by designing elevation, and the cross slope is unchanged, so that the asphalt concrete laying construction steps of each structural layer are consistent with the original pavement construction method, the elevation is adjusted, and each structural layer can be laid layer by layer;

as shown in fig. 2, the "inverted V-shaped ridge-valley" road surface structure includes a first ridge line 201, a first downward slope 202 corresponding to the first ridge line, an opposite road surface edge 203 corresponding to a first ridge line end point, an upward slope 204 corresponding to a second ridge line, a second ridge line 205, a downward slope 206 corresponding to the second ridge line, an opposite road surface edge 207 corresponding to a second ridge line end point, an upward slope 208 corresponding to a third ridge line, a third ridge line 209, a downward slope 210 corresponding to a third ridge line, an opposite road surface edge 211 corresponding to a third ridge line end point, an upward slope 212 corresponding to an end ridge line, and an end ridge line 213.

In the inverted V-shaped ridge-valley road surface structure, each ridge line is positioned at a diagonal line inclined along the driving direction, the terminal point of the previous ridge line is used as the starting point of the next ridge line, and the directions of the upper slope and the lower slope are perpendicular to the ridge line direction.

The two sides of the first ridge line 201 are respectively an original road surface and a first lower slope surface 202 corresponding to the first ridge line, and the two sides of the tail end ridge line 213 are respectively an upper slope surface 212 corresponding to the tail end ridge line and the original road surface; a valley is formed between the first lower slope surface 202 corresponding to the first ridge line and the upper slope surface 204 corresponding to the second ridge line, a valley is formed between the lower slope surface 206 corresponding to the second ridge line and the upper slope surface 208 corresponding to the third ridge line, and then a valley is sequentially formed between the lower slope surface and the upper slope surface of two adjacent ridge lines.

The inverted V-shaped ridge-valley pavement structure is inverted V-shaped along the longitudinal diagonal direction and comprises a lower surface layer, a middle surface layer and an upper surface layer which are sequentially paved on the original roadbed along the longitudinal direction; the upper surface layer is a permeable asphalt concrete surface layer or a impermeable asphalt concrete surface layer; and the middle surface layer and the lower surface layer are both waterproof asphalt concrete surface layers. The ridge-valley structure of the inverted V-shaped ridge-valley pavement structure is arranged on the upper, middle and lower surface layers, or on the upper and middle surface layers, or on the upper surface layer, and is controlled by the top surface elevation of the structural layer.

The inverted V-shaped ridge-valley road surface structure is suitable for adjusting the road surface structure of a road section with a small cross slope or a road section with a small cross slope and a small longitudinal slope, and the length and the number of ridge lines can be adjusted according to the length of the road section with the small cross slope or the road section with the small cross slope and the small longitudinal slope.

The implementation method of the inverted V-shaped ridge-valley road surface structure comprises the following steps:

1) determining the road section length corresponding to each road ridge line and the number of the road ridge lines required to be set according to the zero-slope road section length and the original horizontal and vertical section design;

2) keeping the design elevation of the ridge line position unchanged, reducing the design elevation of the edge of the opposite road surface at the end point of each ridge line according to the gradient requirement, and forming an oblique gradient perpendicular to the ridge lines, wherein the design elevation of the edge of the opposite road surface corresponding to the end point of the ridge line at the end point is kept unchanged;

3) when the ridge-valley structures are arranged on the upper, middle and lower surface layers, the thicknesses of the upper surface layer and the middle surface layer are kept to be the same as the original pavement design, the thickness of the lower surface layer is calculated according to the new design elevation, and the thickness of the lower surface layer is adjusted to meet the design elevation after the gradient is adjusted;

when the ridge-valley structure is arranged on the upper surface layer and the middle surface layer, the thickness of the upper surface layer is kept to be the same as the original pavement design, the thickness of the middle surface layer is calculated according to the new design elevation, and the design elevation after the gradient is adjusted is met by adjusting the thickness of the middle surface layer;

when the ridge-valley structure is arranged on the upper layer, the thickness of the upper layer is calculated according to the new design elevation, and the design elevation after the gradient is adjusted is met by adjusting the thickness of the upper layer;

4) the inverted V-shaped ridge-valley pavement structure is controlled by designing elevation, so that the asphalt concrete laying construction steps of each structural layer are consistent with the original pavement construction method, the elevation is adjusted, and each structural layer can be laid layer by layer.

Application example 1:

referring to fig. 1, a concrete form of elevation schematic diagram of a W-shaped pavement structure longitudinal section of a zero longitudinal slope section for enhancing drainage capacity by using a movable ridge is provided, and the elevation schematic diagram comprises a first slope surface 2, a second slope surface 4, a third slope surface 6, a fourth slope surface 8, a road valley i 3, a road ridge 5 and a road valley ii 7, wherein a first slope surface starting point 1 is connected with an original pavement longitudinal section design, and a fourth slope surface end point 9 is connected with the original pavement longitudinal section design.

The specific parameter setting process is as follows: the method comprises the steps of determining the specific position of a zero longitudinal slope section, selecting four continuous slope surfaces according to the principle of 100m intervals, ensuring the design elevations of a first slope surface starting point 1, a ridge 5 and a fourth slope surface end point 9 to be unchanged, reducing the design elevations of a road valley I3 and a road valley II 7, and forming a longitudinal W-shaped pavement structure.

In the example, after determining the structural design elevation of the W-shaped pavement of the zero slope road section and the thickness of the lower layer, the construction is carried out together with the pavement of the connected road section, the measured elevation is controlled according to the design elevation of the new structure, and finally, steel wires are drawn to directly pave and compact in a layered mode.

When rainfall occurs, rainwater is gathered towards the valley under the action of the longitudinal gradient, and is discharged towards the road shoulder drainage ditch by combining the transverse gradient of the original road surface, so that the drainage performance of the zero-slope road section is enhanced, the road surface structure is convenient to construct, and the cost is lower.

According to the invention, the number of the slope surfaces can be adjusted according to the length of the zero slope road, and the practical experience of the applicant shows that the number of the slope surfaces has certain influence on the driving comfort after the number of the slope surfaces is increased to 6, so that 4 drainage slope surfaces are reasonable, and the longitudinal horizontal length and the slope of each slope surface can be adjusted by considering the length of the zero slope road.

Application example 2:

referring to fig. 2, a specific form of a schematic structural design diagram of an inverted V-shaped road surface for enhancing drainage capacity by using a movable ridge on a zero-cross-slope road section is provided, and the schematic structural design diagram includes a first ridge line 1, a first lower slope surface 2 corresponding to the first ridge line, an opposite road surface edge 3 corresponding to a first ridge line terminal point, an upper slope surface 4 corresponding to a second ridge line, a second ridge line 5, a lower slope surface 6 corresponding to the second ridge line, an opposite road surface edge 7 corresponding to a second ridge line terminal point, an upper slope surface 8 corresponding to a third ridge line, a third ridge line 9, a lower slope surface 10 corresponding to a third ridge line, an opposite road surface edge 11 corresponding to a third ridge line terminal point, an upper slope surface 12 corresponding to a terminal ridge line, and a terminal ridge line 13. The outer side of the first road ridge line and the outer side of the tail end road ridge line are directly connected with the original road surface.

The specific parameter setting process is to determine the specific position of the zero cross slope road section, set the length of the road section where each ridge line is located according to 100m, ensure that the design elevations of the first ridge line 1, the second ridge line 5, the third ridge line 9, the starting point and the end point of the end ridge line 13 are unchanged, reduce the design elevations of the opposite road surface edge 3 corresponding to the end point of the first ridge line, the opposite road surface edge 7 corresponding to the end point of the second ridge line and the opposite road surface edge 11 corresponding to the end point of the third ridge line, and form a road surface structure with two sides of each ridge line in an inverted V shape.

In the embodiment, after the structural design elevation of the inverted V-shaped pavement of the zero slope road section and the thickness of the lower layer are determined, the construction is carried out together with the pavement of the connected road section, the measurement elevation is controlled according to the design elevation of a new structure, and finally, steel wires are drawn to directly pave and compact in a layered mode.

When rainfall occurs, rainwater is gathered towards the valley under the action of the oblique slope, and because the slope is perpendicular to the ridge line of the road, part of accumulated water is drained towards the shoulder drainage ditch during gathering, and the rest of accumulated water is drained at the valley, so that the drainage performance of the zero-slope road section is enhanced, and the road surface structure is convenient to construct and low in cost.

According to the invention, the number of the ridges can be adjusted according to the length of the zero-slope road, and the practical experience of the applicant shows that the number of the ridges has certain influence on the driving comfort after the number of the ridges is increased to 6, so that 4 drainage slope surfaces are reasonable, and the length of the road section where each ridge is located and the slope of the road valley can be adjusted by considering the length of the zero-slope road.

It should be understood that the above-described embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the practice of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description; this is not necessary, nor exhaustive, of all embodiments; and obvious variations or modifications of the invention may be made without departing from the scope of the invention.

Claims (11)

1. The utility model provides a zero slope road section is with structure that removes spine reinforcing drainage ability, mainly be to zero longitudinal gradient highway section and zero cross slope highway section or the equal less highway section design of horizontal, longitudinal gradient two kinds of moving road ridge structures, its characterized in that: adopting a W-shaped ridge-valley road surface structure on a zero longitudinal slope road section; an inverted V-shaped ridge-valley road surface structure is adopted in a zero cross slope road section or a road section with smaller cross slopes and longitudinal slopes;

the W-shaped ridge-valley pavement structure comprises a first slope surface (2), a second slope surface (4), a third slope surface (6) and a fourth slope surface (8); the first slope surface (2) and the third slope surface (6) are in a downhill direction, and the second slope surface (4) and the fourth slope surface (8) are in an uphill direction;

the inverted V-shaped ridge-valley pavement structure comprises a first ridge line (201), a first lower slope surface (202) corresponding to the first ridge line, opposite pavement edges (203) corresponding to a first ridge line end point, an upper slope surface (204) corresponding to a second ridge line, a second ridge line (205), a lower slope surface (206) corresponding to the second ridge line, opposite pavement edges (207) corresponding to a second ridge line end point, an upper slope surface (208) corresponding to a third ridge line, a third ridge line (209), a lower slope surface (210) corresponding to a third ridge line, opposite pavement edges (211) corresponding to a third ridge line end point, an upper slope surface (212) corresponding to a tail end ridge line and a tail end ridge line (213).

2. The structure for enhancing the drainage capacity of a moving ridge for a zero-slope section according to claim 1, wherein: in a W-shaped ridge-valley road surface structure, a first slope surface (2) and a valley I (3) are formed between second slope surfaces (4), a ridge (5) is formed between the second slope surfaces (4) and a third slope surface (6), a valley II (7) is formed between the third slope surfaces (6) and a fourth slope surface (8), and ridge lines and valley lines are perpendicular to the driving direction.

3. The structure for enhancing the drainage capacity of a moving ridge for a zero-slope section according to claim 2, wherein: the W-shaped ridge-valley pavement structure is W-shaped along the longitudinal direction, and is provided with a lower surface layer, a middle surface layer and an upper surface layer which are sequentially paved on the original roadbed along the longitudinal direction, and the cross slope is kept unchanged; the upper surface layer is a permeable asphalt concrete surface layer or a impermeable asphalt concrete surface layer; and the middle surface layer and the lower surface layer are both waterproof asphalt concrete surface layers.

4. The structure for enhancing the drainage ability of the moving ridge for the zero-slope section according to claim 3, wherein: the ridge-valley structure of the W-shaped ridge-valley pavement structure is arranged on the upper, middle and lower surface layers, or on the upper and middle surface layers, or on the upper surface layer, and is controlled by the elevation of the top surface of the structural layer.

5. The structure for enhancing the drainage capacity of a moving ridge for a zero-slope section according to claim 4, wherein: the W-shaped ridge-valley road surface structure is suitable for adjusting the road surface structure of the zero longitudinal slope road section, and the length and the number between the ridge line and the valley line can be adjusted according to the length of the zero longitudinal slope road section.

6. The structure for enhancing the drainage capacity of a moving ridge for a zero-slope section according to claim 1, wherein: in the inverted V-shaped ridge-valley road surface structure, each ridge line is positioned at a diagonal line inclined along the driving direction, the terminal point of the previous ridge line is used as the starting point of the next ridge line, and the directions of the upper slope and the lower slope are perpendicular to the ridge line direction.

7. The structure for enhancing the drainage capacity of a moving ridge for a zero-slope section according to claim 6, wherein: two sides of the first ridge line (201) are respectively a first lower slope surface (202) corresponding to an original road surface and the first ridge line, and two sides of the tail end ridge line (213) are respectively an upper slope surface (212) corresponding to the tail end ridge line and the original road surface; a valley is formed between a first lower slope surface (202) corresponding to the first ridge line and an upper slope surface (204) corresponding to the second ridge line, a valley is formed between a lower slope surface (206) corresponding to the second ridge line and an upper slope surface (208) corresponding to the third ridge line, and then valleys are sequentially formed between the lower slope surface and the upper slope surface of two adjacent ridge lines.

8. The structure for enhancing drainage capacity of a zero-slope road section with a moving ridge according to claim 1, 6 or 7, characterized in that: the inverted V-shaped ridge-valley pavement structure is inverted V-shaped along the longitudinal diagonal direction and comprises a lower surface layer, a middle surface layer and an upper surface layer which are sequentially paved on the original roadbed along the longitudinal direction; the upper surface layer is a permeable asphalt concrete surface layer or a impermeable asphalt concrete surface layer; and the middle surface layer and the lower surface layer are both waterproof asphalt concrete surface layers.

9. The structure for enhancing drainage capacity of a moving ridge for a zero-grade road section according to claim 8, wherein: the ridge-valley structure of the inverted V-shaped ridge-valley pavement structure is arranged on the upper, middle and lower surface layers, or on the upper and middle surface layers, or on the upper surface layer, and is controlled by the top surface elevation of the structural layer.

10. The structure for enhancing drainage capacity of a moving ridge for a zero-grade road section according to claim 9, wherein: the inverted V-shaped ridge-valley road surface structure is suitable for adjusting the road surface structure of a road section with a small cross slope or a road section with a small cross slope and a small longitudinal slope, and the length and the number of ridge lines can be adjusted according to the length of the road section with the small cross slope or the road section with the small cross slope and the small longitudinal slope.

11. A method for implementing a structure for enhancing drainage capacity of a moving road ridge for a zero-slope section according to claims 1 to 10, characterized in that:

the implementation method of the W-shaped ridge-valley pavement structure comprises the following steps:

1) according to the length of the zero slope road section and the design of an original vertical section, determining the longitudinal horizontal length of a first slope surface (2), a second slope surface (4), a third slope surface (6) and a fourth slope surface (8) and the gradient of each slope surface;

2) keeping the design elevations of a first slope starting point (1), a third slope starting point (5) and a fourth slope terminal point (9) unchanged, and calculating and determining the design elevations of a first slope terminal point (3) and a third slope terminal point (7) according to the design gradient of each slope;

3) when the ridge-valley structures are arranged on the upper, middle and lower surface layers, the thicknesses of the upper surface layer and the middle surface layer are kept to be the same as the original pavement design, the thickness of the lower surface layer is calculated according to the new design elevation, and the thickness of the lower surface layer is adjusted to meet the design elevation after the gradient is adjusted;

when the ridge-valley structure is arranged on the upper surface layer and the middle surface layer, the thickness of the upper surface layer is kept to be the same as that of the original pavement design, and the requirement of the design standard height of the W-shaped ridge-valley pavement structure is met by adjusting the thickness of the middle surface layer;

when the ridge-valley structure is arranged on the upper layer, the requirement of the design standard height of the W-shaped ridge-valley pavement structure is met by adjusting the thickness of the upper layer;

4) the W-shaped ridge-valley pavement structure is controlled by designing elevation, and the cross slope is unchanged, so that the asphalt concrete laying construction steps of each structural layer are consistent with the original pavement construction method, the elevation is adjusted, and each structural layer can be laid layer by layer;

the implementation method of the inverted V-shaped ridge-valley road surface structure comprises the following steps:

1) determining the road section length corresponding to each road ridge line and the number of the road ridge lines required to be set according to the zero-slope road section length and the original horizontal and vertical section design;

2) keeping the design elevation of the ridge line position unchanged, reducing the design elevation of the edge of the opposite road surface at the end point of each ridge line according to the gradient requirement, and forming an oblique gradient perpendicular to the ridge lines, wherein the design elevation of the edge of the opposite road surface corresponding to the end point of the ridge line at the end point is kept unchanged;

3) when the ridge-valley structures are arranged on the upper, middle and lower surface layers, the thicknesses of the upper surface layer and the middle surface layer are kept to be the same as the original pavement design, the thickness of the lower surface layer is calculated according to the new design elevation, and the thickness of the lower surface layer is adjusted to meet the design elevation after the gradient is adjusted;

when the ridge-valley structure is arranged on the upper surface layer and the middle surface layer, the thickness of the upper surface layer is kept to be the same as the original pavement design, the thickness of the middle surface layer is calculated according to the new design elevation, and the design elevation after the gradient is adjusted is met by adjusting the thickness of the middle surface layer;

when the ridge-valley structure is arranged on the upper layer, the thickness of the upper layer is calculated according to the new design elevation, and the design elevation after the gradient is adjusted is met by adjusting the thickness of the upper layer;

4) the inverted V-shaped ridge-valley pavement structure is controlled by designing elevation, so that the asphalt concrete laying construction steps of each structural layer are consistent with the original pavement construction method, the elevation is adjusted, and each structural layer can be laid layer by layer.

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