CN114182590A - Novel hard road shoulder pavement structure suitable for highway excavation section road bed drainage - Google Patents
Novel hard road shoulder pavement structure suitable for highway excavation section road bed drainage Download PDFInfo
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- CN114182590A CN114182590A CN202111389361.6A CN202111389361A CN114182590A CN 114182590 A CN114182590 A CN 114182590A CN 202111389361 A CN202111389361 A CN 202111389361A CN 114182590 A CN114182590 A CN 114182590A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C1/00—Design or layout of roads, e.g. for noise abatement, for gas absorption
- E01C1/002—Design or lay-out of roads, e.g. street systems, cross-sections ; Design for noise abatement, e.g. sunken road
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention discloses a novel hard shoulder pavement structure suitable for roadbed drainage at an excavation section of a highway, which comprises a prefabricated shallow disc-shaped shoulder, wherein the prefabricated shallow disc-shaped shoulder is a cuboid concrete prefabricated part, the top of the prefabricated shallow disc-shaped shoulder is provided with a shallow disc-shaped groove, the shallow disc-shaped groove penetrates through the cuboid concrete prefabricated part in the length direction, the shallow disc-shaped groove is an arc which is smooth and excessive in the width direction and extends towards the upper parts of two sides, and a horizontal section is formed when the two sides of the cuboid concrete prefabricated part are close to each other; the shallow dish-shaped groove is used for collecting accumulated water on the road surface and guiding and draining water discharged by the roadbed cutting slope and is discharged along the length direction; the prefabricated shallow dish type curb is a plurality of, arranges side by side in proper order along length direction, and a plurality of shallow dish-shaped recesses link up in length direction, form continuous ponding drainage channel. The hard road shoulder pavement structure reduces land acquisition area and side slope excavated earth and stone volume, solves the problem of drainage of the excavated roadbed of the expressway in the limited space range of the width of the expressway road width, and can save the manufacturing cost.
Description
Technical Field
The invention belongs to the technical field of highway pavement structure design, and particularly relates to a novel hard road shoulder pavement structure suitable for highway excavation section roadbed drainage.
Background
At present, the common way of highway cutting section road bed drainage design is to repair outside the curb and build cutting drainage gutter and carry out the drainage, owing to need special spatial position, this kind of drainage mode increases road width 1.5 ~ 2.0m with the unilateral, has increased area and the excavation earth and stone volume on side slope, has increased the destruction scope to the ecological environment to a certain extent. Because the traditional rectangular side ditches are often poor in landscape effect, the number of cover plate ditches is gradually increased for part of provincial expressways, and the problems that the cover plate ditches are inconvenient to desilt and high in maintenance cost are also exposed. If the cover plate ditch adopts a common cover plate, the cover plate is easy to damage, and the maintenance cost is high; if the high-strength cover plate is adopted, the engineering cost is not low.
How to efficiently utilize the limited space within the road width range to finish the drainage of the excavation subgrade of the highway, achieve the purposes of saving land resources, reducing the construction cost, saving the maintenance cost, improving the landscape and protecting the environment, and is one of the important research subjects of the engineering design and construction of the highway.
Disclosure of Invention
The invention aims to provide a novel hard road shoulder pavement structure suitable for draining roadbed at an excavation section of a highway, which reduces land acquisition area and side slope excavation earth and stone volume, solves the drainage problem of the excavation roadbed of the highway in a limited space range of the width of a highway road width, and can also save the manufacturing cost.
The invention adopts the following technical scheme: a novel hard road shoulder pavement structure suitable for roadbed drainage at an excavation section of a highway comprises a prefabricated shallow disc-shaped road shoulder, wherein the prefabricated shallow disc-shaped road shoulder is a cuboid concrete prefabricated part, a shallow disc-shaped groove is formed in the top of the prefabricated shallow disc-shaped road shoulder, the shallow disc-shaped groove penetrates through the cuboid concrete prefabricated part in the length direction, the shallow disc-shaped groove is an arc which is excessive in smoothness in the width direction and extends upwards from two sides, and a horizontal section is formed when two sides of the cuboid concrete prefabricated part are close to the two sides;
the hard shoulder pavement structure is suitable for a high-grade highway cutting slope and is placed at a hard shoulder design position, the length direction of the hard shoulder pavement structure is consistent with the length trend of a hard shoulder area, the two sides in the width direction are an inner side and an outer side, the outer side is positioned on the side of the slope, and the inner side is attached to a traffic lane of the high-grade highway; the shallow dish-shaped groove is used for collecting accumulated water on the road surface and guiding and draining water discharged by the roadbed cutting slope and is discharged along the length direction;
the prefabricated shallow dish type curb is a plurality of, arranges side by side in proper order along length direction, and a plurality of shallow dish-shaped recesses link up in length direction, form continuous ponding drainage channel.
Furthermore, a shoulder protector is arranged between the prefabricated shallow-dish road shoulder and the side slope, and the shoulder protector is tightly attached to the prefabricated shallow-dish road shoulder and the bottom of the side slope and used for fixing feet of the side slope.
Further, the transverse slope of the shallow dish-shaped groove is 10% -15%.
Furthermore, the width of the prefabricated shallow-dish road shoulder is 2.5-3.0 meters, the length of the prefabricated shallow-dish road shoulder is 5-10 meters, and the half-moon-shaped rise of the groove bottom is 12-20 cm.
Further, the tops of two sides of the prefabricated shallow-dish road shoulder with the upward width are flush with the tops of the inner traffic lane and the outer shoulder protector.
Further, cement mortar with the thickness of 2-3 cm is paved at the bottom of the prefabricated shallow-dish road shoulder.
The invention also discloses a construction method of the hard road shoulder pavement structure suitable for the drainage of the roadbed at the excavated section of the high-grade highway, which comprises the following steps:
step one, constructing a bottom cushion layer of a high-grade highway pavement structure in the range from a driving lane to a slope protection slope toe; paving a lower base course of the pavement in the driving lane and the hard road shoulder area;
step two, vertically erecting a mold at a boundary between a traffic lane and a hard road shoulder area, constructing a base layer and a surface layer on the road surface of the traffic lane, and compacting;
thirdly, dismantling the vertical mold, paving cement mortar in the hard road shoulder area to serve as the mortar for setting the prefabricated shallow dish type road shoulder, sequentially placing the prefabricated shallow dish type road shoulder in parallel along the length direction, communicating a plurality of shallow dish type grooves in the length direction to form a continuous accumulated water drainage channel, and communicating the prefabricated shallow dish type road shoulder at the far end with the embankment side ditch at the slope foot of the filling section;
and step four, constructing a shoulder protector on the outer side of the shallow-dish road shoulder in a cast-in-place mode, and backfilling and compacting between the slope toe and the shoulder protector.
The invention has the beneficial effects that: 1. this hard shoulder road surface structure can effectively reduce high-grade highway area of taking up an area, saves land resources, saves about 2.25 ~ 3.00 mu of land used per kilometer when unilateral sets up, saves about 4.50 ~ 6.00 mu of land used per kilometer when two sides set up. 2. The hard road shoulder pavement structure is used for draining water, so that the width of a road can be reduced, the volume of earth and stones excavated by a side slope is reduced, and the construction cost is saved; after the road width is reduced, the slope starting point is contracted towards the center of the road, the height of the excavation slope is reduced, and the damage to the original ecological environment is reduced. 3. The cross slope of the shallow dish-shaped groove of the hard road shoulder pavement structure is small, the driving visual landscape effect is good, special trench bottom desilting is not needed, cleaning is convenient, and maintenance cost is low.
Drawings
FIG. 1 is a schematic structural diagram of a prefabricated shallow dish type road shoulder;
FIG. 2 is a typical cross-sectional layout of a hard shoulder pavement structure;
wherein: 1. prefabricating a shallow dish type road shoulder; 2. a shallow dish-shaped recess; 3. shoulder protection; 4. side slope; 4d, traditional side slope; a, traffic lane.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a novel hard shoulder pavement structure suitable for roadbed drainage at a square excavation section of an expressway, wherein a high-grade highway refers to the expressway and a first-grade highway, the width standard of a hard shoulder is given in an asphalt pavement design specification JTGD50-2017, namely the width is 2.5-3 m, and the hard shoulder pavement structure can be used only when the width of the hard shoulder meets the range. As shown in fig. 1, the hard shoulder pavement structure comprises a prefabricated shallow disc-shaped road shoulder 1, wherein the prefabricated shallow disc-shaped road shoulder 1 is a rectangular concrete prefabricated member, a shallow disc-shaped groove 2 is formed in the top of the prefabricated shallow disc-shaped road shoulder, the shallow disc-shaped groove 2 penetrates through the rectangular concrete prefabricated member in the length direction, is an arc which is smooth and excessive in the width direction and extends upwards from two sides, and is a horizontal section when approaching two sides of the rectangular concrete prefabricated member; the transverse slope of the shallow dish-shaped groove 2 is 10-15%. The width of the prefabricated shallow dish-shaped road shoulder 1 is 2.5-3.0 meters, the length of the prefabricated shallow dish-shaped road shoulder is 5-10 meters, and the half-moon-shaped rise of the groove bottom is 12-20 cm. A shoulder protector 3 is also arranged between the prefabricated shallow disc-shaped road shoulder 1 and the side slope 4, and the shoulder protector 3 is tightly attached to the bottoms of the prefabricated U-shaped road shoulder 1 and the side slope 4 and used for fixing feet of the side slope 4. The shoulder pad 3 adopts C20 cast-in-place concrete, and ensures the joint with the side slope 4.
The design transverse slope is 10% -15%, the design transverse slope is set based on the width of the prefabricated shallow dish type road shoulder 1, the width of the prefabricated shallow dish type road shoulder 1 meets the technical Standard of Highway engineering (JTG B01-2014), the width is a set value, the width is wide enough within the range of 2.5-3.0 m, and due to the fact that the prefabricated shallow dish type road shoulder is shallow, water flows into the shallow dish type groove 2 and also flows into the shallow dish type groove along the cambered surface, in the flowing-in process, the water flows to the far end along the length direction, and the situation of water drainage aggregation can not occur.
According to the design, the water passing section area of the prefabricated shallow disc type road shoulder 1 with 10-15 percent of cross slope and 2.5-3.0 m width is 0.14-0.30 m2The area of the water cross section of the conventional rectangular side ditch with the width of 40-50 cm is 0.16-0.25 m2Therefore, the design value of the cross slope of the shallow dish-shaped groove 2 is sufficient for the water discharge amount.
In addition, from the perspective of the driver on the traffic lane a, the design value of the cross slope does not visually generate a sense of unevenness, and the visual landscape effect for the driver is good.
The hard shoulder pavement structure is suitable for a high-grade highway cutting slope 4 and is placed at a hard shoulder design position, the length direction of the hard shoulder pavement structure is consistent with the length trend of a hard shoulder area, the two sides in the width direction are an inner side and an outer side, the outer side is positioned on the side of the slope 4, and the inner side is attached to a traffic lane a of the high-grade highway; the shallow dish-shaped groove 2 is used for collecting accumulated water on the road surface and guiding and draining the roadbed cutting side slope for draining water and is discharged along the length direction. The prefabricated shallow dish type curb 1 is a plurality of, arranges side by side in proper order along length direction, and a plurality of shallow dish-shaped recess 2 link up in length direction, form continuous ponding drainage channel.
The tops of the two sides of the width of the prefabricated shallow-dish road shoulder 1 are flush with the tops of the inner side lane a and the outer side shoulder protectors 3, the smoothness of the road surface is guaranteed, and water cannot be accumulated at the edges of the inner side and the outer side of the prefabricated shallow-dish road shoulder 1.
The invention also discloses a method for constructing the novel hard road shoulder pavement structure suitable for the roadbed drainage of the excavation section of the expressway, which comprises the following steps:
after the roadbed delivery inspection and acceptance pass, the resilience modulus and the vertical compressive strain of the top surface of the asphalt pavement roadbed both meet the existing design specification of the road asphalt pavement (JTG D50) and the technical specification of the road asphalt pavement construction (JTG F40), a cushion layer at the bottom of a high-grade road pavement structure is constructed in the range from a traffic lane a to a slope protection slope foot, and graded broken stones or sand gravel stones with the thickness of 15-20 cm can be paved. The upper base layer material is 3-6% cement stable graded broken stone, and the crushed stone is compacted after being paved, and the compaction degree meets the standard requirement of JTG F80/1 in the first volume civil engineering of the highway engineering quality inspection and evaluation standard.
The measuring and paying-off method comprises the steps of determining the construction top surface elevation of a lower base layer at the bottom of a prefabricated shallow disc type road shoulder 1 based on the installation space of the prefabricated shallow disc type road shoulder 1, paving the lower base layer of a road surface in a traffic lane a and a hard road shoulder area, wherein the lower base layer is made of 3% -6% cement-stabilized graded broken stones, compacting after paving, and the compaction degree meets the standard requirement of JTG F80/1 of the first volume civil engineering of the highway engineering quality inspection and assessment standard.
Step two, vertically erecting a mold at a boundary between the carriageway a and the hard road shoulder area, constructing a base layer and a surface layer on the pavement of the carriageway a, and compacting; the upper base layer material is 3-6% cement stable graded broken stone, and the crushed stone is compacted after being paved, and the compaction degree meets the standard requirement of JTG F80/1 in the first volume civil engineering of the highway engineering quality inspection and evaluation standard.
When the surface layer is constructed, a modified asphalt macadam seal layer with the thickness of 1cm, a coarse-grained asphalt concrete AC-25 lower surface layer with the thickness of 8cm, a medium-grained asphalt concrete AC-20 middle surface layer with the thickness of 6cm and a coarse-grained asphalt concrete AC-25 upper surface layer with the thickness of 4cm are sequentially paved from bottom to top. The pavement surface layers are paved and compacted in layers, and the compaction degree meets the standard requirement of JTG F80/1 in the first civil engineering of the existing highway engineering quality inspection and evaluation standard.
Step three, dismantling the vertical formwork, paving M10 cement mortar with the thickness of 2-3 cm in the hard road shoulder area as the setting mortar of the prefabricated shallow disc type road shoulder 1, sequentially placing the prefabricated shallow disc type road shoulder 1 in parallel along the length direction, communicating a plurality of shallow disc type grooves 2 in the length direction to form a continuous accumulated water drainage channel, and communicating the prefabricated shallow disc type road shoulder 1 at the far end with the embankment side ditch at the slope foot of the filling section;
and step four, constructing a C20 concrete shoulder protector 3 on the outer side of the shallow-dish-shaped road shoulder 1 in a cast-in-place mode, and backfilling and compacting the space between the slope toe and the shoulder protector 3.
As shown in fig. 2, a typical cross-sectional layout of a hard shoulder pavement structure is shown, wherein B is a layout of the construction of the prefabricated shallow dish type shoulder 1 in combination with the shoulder protector 3, D is a layout of the drainage of the cutting gutter outside the shoulder, and the corresponding traditional side slope 4D needs to be additionally widened outside the hard shoulder due to the fact that the cutting drainage gutter needs to be built outside the hard shoulder, so that the width of the road is increased as a whole. After the road width is widened, the traditional side slope 4d is positioned outside the cutting drainage side ditch.
The prefabricated shallow dish-shaped road shoulder 1 is constructed by combining the shoulder protector 3, the prefabricated shallow dish-shaped road shoulder 1 serves as a hard road shoulder on one hand, and the shallow dish-shaped groove 2 on the prefabricated shallow dish-shaped road shoulder serves as a drainage channel on the other hand, so that a cutting drainage gutter does not need to be built to occupy an extra width space towards the outside, the width of the highway is effectively reduced, and the occupied area is saved. A new slope 4 is formed outside the shoulder 3. The width of the cutting drainage side ditch is 1.5-2 meters, namely the width of the one-side reduction is 1.5-2 meters, compared with the traditional side slope 4d, the position of the new side slope 4 moves 1.5-2 meters towards the traffic lane a side, 1.5-2.0 square meters of land is saved in each linear meter, 1500-2000 square meters of land is saved in each kilometer, about 2.25-3.00 mu of land is saved in each kilometer when the two sides are arranged in the same way, and about 4.50-6.00 mu of land is saved in each kilometer. In addition, as the slope starting point of the new side slope 4 is contracted towards the center of the road lane a, the height of the excavation side slope is reduced, and the damage to the original ecological environment can be reduced.
By adopting the prefabricated shallow dish-type road shoulder 1 as a hard road shoulder, the construction cost is saved when no cutting drainage side ditch is additionally built in the excavation section of the high-grade highway; and moreover, special trench bottom dredging is not needed, the cleaning is convenient, and the maintenance cost is low.
Claims (7)
1. A novel hard road shoulder pavement structure suitable for roadbed drainage of a square excavation section of a highway is characterized by comprising a prefabricated shallow disc type road shoulder (1), wherein the prefabricated shallow disc type road shoulder (1) is a cuboid concrete prefabricated part, a shallow disc-shaped groove (2) is formed in the top of the prefabricated shallow disc type road shoulder, the shallow disc-shaped groove (2) penetrates through the cuboid concrete prefabricated part in the length direction, is an arc which is smooth and excessive in the width direction and extends upwards from two sides, and is a horizontal section when being close to two sides of the cuboid concrete prefabricated part;
the hard shoulder pavement structure is suitable for a cutting slope (4) of a high-grade highway and is placed at a hard shoulder design position, the length direction of the hard shoulder pavement structure is consistent with the length trend of a hard shoulder area, the two sides in the width direction are an inner side and an outer side, the outer side is positioned on the slope (4) side, and the inner side is attached to a traffic lane (a) of the high-grade highway; the shallow dish-shaped groove (2) is used for collecting accumulated water on the road surface, guiding and draining water on the roadbed cutting slope (4) and discharging the water along the length direction;
the prefabricated shallow dish type road shoulders (1) are multiple and are sequentially arranged in parallel along the length direction, and the shallow dish-shaped grooves (2) are communicated in the length direction to form a continuous accumulated water drainage channel.
2. The novel hard road shoulder pavement structure suitable for the roadbed drainage of the excavation section of the expressway as claimed in claim 1, wherein a shoulder protector (3) is further arranged between the prefabricated shallow-dish-shaped road shoulder (1) and the side slope (4), and the shoulder protector (3) is tightly attached to the bottoms of the prefabricated shallow-dish-shaped road shoulder (1) and the side slope (4) and used for fixing feet of the side slope (4).
3. A new type of hard shoulder pavement structure adapted for drainage of subgrade in highway excavation section according to claim 1 or 2, characterized in that the cross slope of said shallow dish-shaped groove (2) is 10% -15%.
4. The novel hard road shoulder pavement structure suitable for roadbed drainage of the excavation section of the expressway as claimed in claim 3, wherein the width of the prefabricated shallow dish type road shoulder (1) is 2.5-3.0 meters, the length of the prefabricated shallow dish type road shoulder is 5-10 meters, and the half-moon-shaped rise of the groove bottom is 12-20 cm.
5. A novel hard shoulder pavement structure suitable for highway excavation section subgrade drainage according to claim 4, characterized in that the tops of two sides of the prefabricated shallow dish type shoulder (1) in the width direction are flush with the tops of the inner traffic lane (a) and the outer shoulder pad (3).
6. The novel hard road shoulder pavement structure suitable for roadbed drainage of the excavation section of the expressway as claimed in claim 5, wherein cement mortar with the thickness of 2-3 cm is paved at the bottom of the prefabricated shallow dish type road shoulder (1).
7. The construction method of a novel hard shoulder pavement structure suitable for roadbed drainage of a square section of a highway according to any one of claims 1-6, characterized by comprising the following steps:
step one, constructing a bottom cushion layer of a high-grade highway pavement structure in the range from a driving lane (a) to a slope protection slope toe; paving a lower base course of the pavement in the traffic lane (a) and the hard shoulder area;
step two, vertically erecting a mold at a boundary between the traffic lane (a) and the hard road shoulder area, constructing a base layer and a surface layer on the road surface of the traffic lane (a), and compacting;
thirdly, dismantling the vertical formwork, paving cement mortar in the hard road shoulder area to serve as the mortar for the prefabricated shallow-disc road shoulder (1), sequentially placing the prefabricated shallow-disc road shoulder (1) in parallel along the length direction, communicating a plurality of shallow-disc grooves (2) in the length direction to form a continuous accumulated water drainage channel, and communicating the prefabricated shallow-disc road shoulder (1) at the far end with the embankment side ditch at the slope foot of the filling section;
and step four, constructing the shoulder protector (3) on the outer side of the shallow-dish-shaped road shoulder (1) in a cast-in-place mode, and backfilling and compacting between the slope toe and the shoulder protector (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111389361.6A CN114182590A (en) | 2021-11-19 | 2021-11-19 | Novel hard road shoulder pavement structure suitable for highway excavation section road bed drainage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111389361.6A CN114182590A (en) | 2021-11-19 | 2021-11-19 | Novel hard road shoulder pavement structure suitable for highway excavation section road bed drainage |
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Citations (4)
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| CN203834313U (en) * | 2014-05-06 | 2014-09-17 | 昆明学院 | Impound strap for highway pavement |
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2021
- 2021-11-19 CN CN202111389361.6A patent/CN114182590A/en active Pending
Patent Citations (4)
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|---|---|---|---|---|
| CN203834313U (en) * | 2014-05-06 | 2014-09-17 | 昆明学院 | Impound strap for highway pavement |
| CN204608547U (en) * | 2015-05-05 | 2015-09-02 | 中交第一公路勘察设计研究院有限公司 | A kind of Permafrost Area is for spreading the ventilation curb of flexible pavement heat |
| CN207159748U (en) * | 2017-08-21 | 2018-03-30 | 中国水利水电第十四工程局有限公司 | A kind of highway embankment section curb formula discharge structure |
| AU2019101707A4 (en) * | 2019-02-15 | 2020-02-13 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Design and construction method for using modified phosphogypsum in roadbed and slope |
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