CN106337342B - A kind of road cross-sectional configuration for mountain highway - Google Patents

Abstract

The present invention relates to a road cross-section structure for mountain roads. The pavement base is a double-wave cross-section structure with a high center and two concave sides. A concrete road surface is poured on the pavement base. The trough structure, pavement base and concrete pavement finally form a cross-sectional structure of "∞". By thickening the concrete road surface at the bottom of the wheel, the strength of the slab is increased; by setting a ditch in the middle, the collected water flow does not scour the soil; by setting a concave transverse slope, the road surface water does not cause scour to the mountain side slope and recharge the bottom of the slab The slab is suspended due to scouring to make road driving and roadbed safer; the chassis of the car body is raised by both sides of the groove to protect the car body; the water flowing down the mountain on one side or both sides is evenly collected, and the original drainage state of the mountain is not affected. Man-made changes are caused, there is no centralized drainage to wash away, and the natural ecology is maintained. The drainage in the middle ditch is clear and free of silt.

Description

A road section structure for mountain roads

technical field

The invention relates to the road section structure of mountain roads, especially the road section structure of winding mountain roads in areas with many slopes.

Background technique

The cross-section design of the existing highway pavement is generally a rectangular slab. This design is suitable for vehicles to turn, overtake, and pass vehicles at will. The design form requires more concrete, which is an excessive consumption of materials for rural roads and low-grade roads in mountainous areas with single-lane vehicles; once the slab body breaks or the expansion joint leaks in this slab road, it will quickly lead to substratum lamination Bad slopping, even the board body warps and cracks until it cannot be used.

The use of such rectangular plates on winding mountain roads in mountainous areas is more likely to cause the inner side to scour the mountain, causing landslides, and the outer side to scour the slopes, causing the plates to hang, break and subgrade to collapse; wet and slippery rainy days even cause vehicles to slip out of the road and turn down the cliffs.

Contents of the invention

The purpose of the present invention is to overcome the disadvantages of scouring the roadbed due to accumulated water on the hillside in mountainous areas, and scour the hillside on the side of the hollowed-out slab due to water accumulation in the roadbed, simulate the natural drainage state of the mountain body, and prevent the water flow from concentrating on the slope body due to the construction of roads, thereby protecting the original appearance of the mountain body and strengthening road traffic. Safe design, providing a road section configuration for low-grade roads in mountainous areas.

For this reason, the technical solution of the present invention is a road cross-section structure for mountainous roads. The road cross-section structure of mountainous roads includes road grooves, and the road grooves are pavement bases. Concave double-wave cross-section structure, the concrete road surface is poured on the pavement base. The top surface of the concrete road is a streamlined groove-like structure with high sides and a middle concave. The pavement base and the concrete road surface finally form a "∞" cross-section structure.

The further improvement is that: the "∞" cross-section structure of the road base and the concrete road surface is in the slope section of the curve, longitudinally adding steel bars in the concrete road surface to strengthen the strength of the road surface, and laying a drainage floor drain in the valley section with a gentle slope Concentrate drainage.

A further improvement is that: in the mountainous road, one side is a hillside sidewall and the other side is a steep slope and a steep cliff structure, the concrete road surface layer of the hillside sidewall directly discharges the natural drainage of the mountain slope with a slope of 3-4% , The concrete road surface on the steep side of the steep slope is set with a slope of 4-6% in reverse, and the water is drained towards the middle of the road. There is no interception ditch on the top of the mountain slope on the side wall of the hillside, and the concrete road does not need a side ditch, and it flows directly to the road surface In the middle groove, the rainwater on the road surface layer on the side of the steep slope flows into the middle groove of the road surface in reverse, so as not to cause additional erosion on the slope cliff and maintain the natural state of the slope cliff.

A further improvement is that both sides of the middle embankment of the mountainous road are steep slopes and steep cliffs. In the road surface structure at the embankment, the drainage state of the concrete road surface layer is a slope of 4-6%, and all drain toward the middle of the road.

The further improvement lies in: both sides of the road cutting in the mountainous area are hillside sidewall structures, the concrete road surface layer is naturally connected with the mountain slope surface, and the concrete road surface layer is set with a slope of 3-4% in the same direction as the drainage state of the slope surface , all drain to the middle, and there is no need to set a water intercepting gutter on the top of the slope, and the rainwater on the slope is naturally scattered and flows to the middle drainage ditch; there is no need to set side ditch and other auxiliary protection, which reduces the cost and avoids the concentrated erosion of the roadbed.

The further improvement is: when there is a road shoulder on one side of the steep slope, the drainage slope of the road surface is set in reverse, and the water still flows into the ditch in the middle of the road surface, without scouring the slope and cliff, and guardrails are provided on the road shoulder.

Beneficial effect:

The road section structure of the mountainous road according to the present invention thickens the concrete at the part under the vehicle wheel to enhance the road bearing capacity; the drainage of the subgrade drains from the middle; on the one hand, the concrete is saved, and on the other hand, the natural drainage of the mountain body is kept flowing into the middle ditch , will not concentrate on scouring the roadbed; the road section design is more suitable for rush work and areas with power difficulties; the road section design protects the chassis of vehicles with low chassis from being scratched.

The concrete road surface is streamlined and groove-shaped. When the vehicle is running, the wheel rolling parts are mostly located at the thickened concrete road surface. The width of the middle ditch in the pass-through section remains unchanged, and the sides are appropriately widened and the transverse slope is reduced.

The design of the concrete road surface increases the distance between the chassis and the ground, which effectively protects the chassis of the car and indirectly improves the safety and comfort of the car.

The design of the concrete road surface meets the requirements of environmental protection. The accumulated water discharged from the middle ditch is clear and free of mud, which can quickly drain away the mountain and road accumulated water, and can indirectly wash and clean the vehicle chassis.

The road section structure design and maintenance, construction cost and material cost are all the best among similar designs. The road surface performance has been proved by practice in Fujian, Guangxi, Guangdong and other places, and there is no damage to steam-50 long vehicles and heavy vehicles; the aesthetic appearance of the section form is slightly Difference.

The form of road section structure design is not limited to winding roads, it is also applicable to undulating terrain with continuous ups and downs.

One side of the road section structure fits naturally with the slope wall, and an inner flow slope is set on the side of the steep cliff, so that the accumulated water on the road will not wash away the side slope, and the accumulated water on the downward slope will naturally flow into the ditch in the center of the road surface;

The road surface on the side wall of the hillside is naturally connected to the hillside, and the road surface on the side of the steep slope is reversely drained. The design of the road section requires that the two-way cross slope on both sides of the middle ditch shall not be greater than 6%, so as to avoid rollover when super-high vehicles pass by.

By thickening the concrete road surface at the bottom of the wheel, the strength of the slab is increased; by setting a ditch in the middle, the collected water flow will not scour the soil; by setting a concave transverse slope, the road surface water will not cause scour to the mountain side slope and recharge the bottom of the slab The slab is suspended due to scouring to make road driving and roadbed safer; centralized drainage wells are set up in the line buffer and cross-traffic section to eliminate section catchment water; the chassis of the car body is raised by both sides of the groove to protect the car body; Collecting water running down one or both sides of the mountain will not cause artificial changes to the original drainage state of the mountain, and there will be no centralized drainage to wash away, maintaining the natural ecology, and the drainage in the middle ditch is clear and free of silt. This design does not exclude measures such as protective retaining walls for driving or mountain safety.

Description of drawings

Fig. 1 is a cross-sectional view of the present invention with a hillside sidewall on one side and a steep slope and cliff structure on the other side.

Fig. 2 is a cross-sectional view of steep slope and cliff structures on both sides of the embankment type of the present invention.

Fig. 3 is a cross-sectional view of a hillside sidewall structure on both sides of the road cutting of the present invention.

In the figure, 1 is the side wall of the hillside on one side and a steep slope on the other side; 2 is the road base, 3 is the steel bar, 4 is the concrete road surface, 5 is the road shoulder, and 6 is the side wall of the hillside on both sides of the road cutting. Structure, 7 is a guardrail, and 8 is an embankment type, both sides are steep slopes and cliffs.

Detailed ways

The present invention is as shown in Figure 1/2/3.

A road cross-section structure for mountainous roads. The road cross-section structure of mountainous roads includes road grooves. Concrete road surface layer 4 is poured on top, wherein the concrete road surface layer 4 is a streamlined groove-like structure with high concave on both sides, and the pavement base 2 and concrete road surface layer 4 finally form a cross-sectional structure of "∞".

The "∞" cross-section of the road base 2 and the concrete road surface 4 is constructed in the slope section of the curve, and steel bars 3 are added longitudinally in the concrete road surface 4 to strengthen the strength of the road surface. drain.

In the mountain road, one side is the hillside side wall, and the other side is the steep slope and steep cliff structure 1, the concrete road surface layer 4 of the hillside side wall is naturally connected with the slope surface, and the rainwater is converged to the middle ditch; The surface layer of the concrete road is set with a reverse slope to drain water towards the middle of the road; the natural drainage of the side wall of the mountain slope will not scour the roadbed but directly flow into the middle groove of the 4th floor of the concrete road surface, and the rainwater on the road surface layer on the side of the steep slope and cliff It flows into the groove in the middle of the road in reverse, so as not to cause additional erosion on the slope and maintain the natural state of the slope.

Both sides of the embankment type on the road on the mountain ridge in the mountainous area are steep slopes and cliffs. In the structure 8, the drainage state of the concrete road surface layer 4 is a slope of 4-6%, and all drain toward the middle of the road.

Both sides of the road cutting in the mountainous area are hillside sidewall structures 6, the concrete road surface layer is naturally connected with the mountain slope surface, and the concrete road surface layer 4 sets a slope of 3-4% for the natural drainage of the mountain body slope surface, and both Drainage to the middle; the concrete road surface layer 4 collects the natural drainage of the mountain slope into the middle concrete groove, avoiding the erosion of the roadbed.

A shoulder 5 is provided on one side of the steep slope, and a guardrail 7 is provided on the shoulder 5 .

The invention is beneficial to drain water from one side of the mountain body along the road surface, and is also beneficial to prevent the seepage of the mountain body from scouring the soil and rocks at the bottom of the subgrade, and can protect the other side of the slope body, prevent road surface water from scouring the side slope, and prevent accumulated water from recharging Hollow out the soil and rock under the slab to suspend the slab; adopt the "∞" section form, the maximum thickness of the underlying layers on both sides is 60cm, and the thinnest part in the middle is 10cm. For the slope section of the curve, the longitudinal reinforcement 3 can be appropriately added to prevent the slab from being broken ; For areas inconvenient for hydropower in mountainous areas, the concrete can be vibrated without vibrating, and the concrete can be directly paved and plastered to form a high pavement strength, and it will not be damaged under the load of steam-50. Practices in Fujian, Guangxi, Guangdong and other places have proved There is no damage to steam-50 long vehicles and heavy vehicles.

During construction, manually or mechanically excavate the pavement base 2, and then excavate thickened water-stop double grooves about 20cm deep according to the common wheelbase of the vehicle. The double-wave cross-section groove first pours the pavement base 2 with concrete and immediately adds longitudinal reinforcement 3 , the embedded parts of the outer side guardrail, the outer side formwork, and then pour the upper concrete road surface 4; the steps are advanced during construction, and the upper and lower layers are separated by about 10 meters, and the construction is from the bottom of the slope to the top of the slope; the concave ditch in the middle of the surface The arc is formed manually by scraping with a shovel, and it can be wiped flat by pulling the wire.

The two-way cross slope of the concrete road surface layer 4 shall not be greater than 6%, so as to avoid rollover when super-high vehicles pass by.

The road section structure design defines the width of the road surface as 4-6 meters, but it is not limited; every other distance should set up a widening zone for passing vehicles and a continuous climbing buffer zone for vehicles; the buffer zone can be equipped with centralized drainage wells and screen covers to remove accumulated water.

The design of the road section structure does not limit the form of the outer guardrail, which is for reference only.

The road section structure design does not guarantee driving safety, but it does have the function of improving driving safety.

Claims (7)

1. a kind of road cross-section structure that is used for mountain road, the road cross-section structure of mountain road comprises road groove, and road groove is pavement base, it is characterized in that: described road base is the double-wave cross-section structure that middle height both sides is concave, Concrete pavement is poured on the pavement base, where the concrete pavement is a streamlined groove-like structure with high concave on both sides, and the pavement base and concrete pavement finally form a cross-sectional structure of "∞". 2. A road cross-section structure for mountain roads according to claim 1, characterized in that: the "∞" cross-section structure of the road base and the concrete road surface is in the curve slope section, and the concrete road surface Add steel bars longitudinally in the layer to strengthen the strength of the pavement, and bury drainage floor drains in the valley section with gentle slope for centralized drainage. 3. A road section structure for mountain roads according to claim 1 or 2, characterized in that: in the mountain road, one side is a hillside side wall, and one side is a steep slope and cliff structure, the side of the hillside The concrete road surface of the wall and the slope of the mountain have a slope of 3-4% in the same direction, and the drainage state of the concrete road surface on the side of the steep slope and cliff is a reverse slope of 4-6%, and both drain toward the middle of the concrete road. 4. A kind of road section structure for mountain road according to claim 1 or 2, it is characterized in that: both sides of the embankment type in the mountain road are steep slopes and cliffs, the drainage state of the concrete road surface layer The slope is 4-6%, and all drain to the middle of the concrete road. 5. A kind of road section structure for mountain road according to claim 1 or 2, it is characterized in that: both sides of the road cutting in the mountain road are all hillside side wall structures, the concrete road surface and the mountain slope The surface is naturally connected, and the concrete road surface is set with a slope of 3-4% in the same direction as the drainage state, and the drainage is all towards the middle. 6. A road section structure for mountain roads according to claim 3, characterized in that: one side of the steep slope and cliff is provided with a road shoulder, and a guardrail is provided on the road shoulder. 7. A road section structure for mountain roads according to claim 4, characterized in that road shoulders are provided on the side of steep slopes and cliffs, and guardrails are provided on the road shoulders.