CN204401390U - A kind of novel pavement drainage system - Google Patents

Abstract

The utility model discloses a novel pavement drainage system, which comprises an upper layer of asphalt concrete, an asphalt bonding layer, a lower layer of asphalt concrete, a drainage base layer, a waterproof layer, a sticky layer, a subbase layer, a first-stage crushed stone blind ditch, and a water collection Pipelines, C25 concrete prefabricated slabs, C25 cast-in-place concrete shoulders, earth layers, water-retaining belts, second-grade gravel blind ditches and embankment rapid flow channels. The asphalt concrete upper layer, the asphalt bonding layer, the asphalt concrete lower layer, the drainage base layer, the waterproof layer, the adhesive layer and the subbase layer are sequentially connected from top to bottom. The utility model can adopt the method of combining the impermeable asphalt pavement layer and the permeable base layer to realize the comprehensive drainage of the pavement and improve the service life of the pavement.

Description

A New Pavement Drainage System

technical field

The utility model relates to a comprehensive pavement drainage system, in particular to a novel pavement drainage system.

Background technique

As an open-air public facility, highways are subjected to multiple effects of the natural environment, and water damage is the phenomenon of damage to the pavement after precipitation enters the pavement structure layer. At the same time, water damage is one of the most common and most destructive diseases among the early diseases of asphalt concrete pavement.

Usually, the sources of moisture on the road mainly include surface infiltration water, groundwater, capillary water action, seepage action, water vaporization, etc. Among them, the water infiltration on the surface of the road surface is more harmful and the most difficult to eliminate. Therefore, the infiltration of water into the pavement surface is the key point of road drainage design. A lot of research and experiments have been carried out at home and abroad.

The traditional asphalt pavement is an impermeable pavement, and a small amount of pavement area can't be quickly removed after the water seeps into the pavement base, causing water damage and reducing the service life of the pavement. In view of this, it is necessary to design a pavement drainage method combined with anti-drainage, that is, a combined design of impermeable asphalt surface and permeable base to achieve the best drainage effect.

Utility model content

The purpose of this utility model is to overcome the shortcomings of the above-mentioned prior art, and provide a new type of pavement drainage system, which can realize the comprehensive drainage of the pavement by combining the impermeable asphalt pavement layer and the permeable base layer, and improve the service life of the pavement .

In order to achieve the above object, the novel pavement drainage system described in the utility model comprises asphalt concrete upper layer, asphalt bonding layer, asphalt concrete lower layer, drainage base layer, waterproof layer, sticky layer, subbase layer, first grade crushed stone Blind ditch, water collection pipe, C25 concrete prefabricated slab, C25 cast-in-place concrete shoulder protection, soil layer, water-retaining belt, second-grade crushed stone blind ditch and embankment rapid flow trough;

The asphalt concrete upper layer, asphalt bonding layer, asphalt concrete lower layer, drainage base, waterproof layer, sticky layer and subbase are sequentially connected from top to bottom;

The side of the earth-building layer is in contact with one side of the subbase, the two sides of the first graded gravel blind ditch are respectively in contact with one side of the drainage base and the side of the C25 cast-in-place concrete shoulder, and the other side of the drainage base The side is in contact with the side of the second-grade gravel blind ditch, the bottom of the first-grade gravel blind ditch is in contact with the waterproof layer, and the bottom of the C25 cast-in-place concrete shoulder is in contact with the upper surface of the earth layer and the upper surface of the subbase. Contact, the lower surface of the C25 concrete precast slab is in contact with the upper surface of the drainage base, the upper surface of the first-grade crushed stone blind ditch and the upper surface of the C25 cast-in-place concrete shoulder, and the side of the C25 concrete precast slab is in contact with the top surface of the asphalt concrete The side of the layer, the side of the asphalt bonded layer and the side of the asphalt concrete lower layer are in contact, the water blocking strip is located on the side of the upper surface of the asphalt concrete upper layer, and the water blocking strip and the C25 concrete precast slab are located on the same side of the asphalt concrete upper layer. The water collection pipe is buried in the blind ditch of the first-grade crushed stone, and the outlet of the water collection pipe is connected with the rapid flow groove of the embankment.

Also includes the reserved pipeline, the reserved pipeline is fixed on the side of the drainage base, the reserved pipeline is located on the same side of the drainage base as the second graded crushed stone blind ditch, the height of the reserved pipeline is 15cm, and the width of the reserved pipeline is It is 20cm.

The thickness of the asphalt concrete upper layer is 4cm, and the asphalt concrete upper layer is made of fine-grained modified asphalt concrete AC-13C;

The asphalt bonding layer is made of SBS modified asphalt material, and the amount of the asphalt bonding layer is 1.5-1.8kg/m ² ;

The thickness of the lower layer of asphalt concrete is 6cm, and the lower layer of asphalt concrete is formed by medium-grain asphalt concrete AC-20C;

The thickness of the drainage base is 40cm, and the porosity of the drainage base is greater than 17%. The drainage base is made of porous modified concrete.

The waterproof layer is a double-sided fiber waterproof membrane;

The amount of the adhesive layer is 0.4-0.6kg/m ² , and the adhesive layer is composed of No. 70 asphalt or No. 90 asphalt;

The thickness of the base layer is 18 cm.

The thickness of the C25 concrete prefabricated slab is 10cm;

The height of the C25 cast-in-place concrete shoulder protection is 40cm.

The porosity of the first graded crushed stone blind ditch and the second graded crushed stone blind ditch are both greater than or equal to 25%, and the first graded crushed stone blind ditch and the second graded crushed stone blind ditch are both composed of Composed of gravel with a particle size greater than or equal to 4.75mm.

The width of the portion of the upper surface of the drainage base that is in contact with the C25 concrete prefabricated slab is 10 cm.

The width of the part of the upper surface of the subbase that is in contact with the C25 cast-in-place concrete shoulder protection is 15 cm.

The distance from the axis of the water collecting pipe to the C25 cast-in-place concrete shoulder guard is 10cm, the water collecting pipe is a PVC water collecting pipe, and the diameter of the water collecting pipe is 10cm.

The transverse slope of the asphalt concrete upper course is 2%.

The utility model has the following beneficial effects:

The new pavement drainage system described in the utility model uses the first-stage crushed stone blind ditch in combination with the water collection pipe to form a pavement edge drainage system. Features, when the rainwater permeates the upper layer of asphalt concrete and the lower layer of asphalt concrete into the drainage base, the water is collected through the catchment pipes and then discharged to the rapids of the embankment, and a waterproof layer is set between the drainage base and the subbase to prevent rainwater from seeping down. Affect the stability of the subbase. At the same time, when there is a large amount of water on the road surface, it will be intercepted by the water retaining belt, and will be discharged along the longitudinal direction to the embankment rapids. Improve the service life of the road surface.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Among them, 1 is the upper layer of asphalt concrete, 2 is the asphalt bonding layer, 3 is the lower layer of asphalt concrete, 4 is the drainage base layer, 5 is the waterproof layer, 6 is the adhesive layer, 7 is the subbase layer, 8 is C25 concrete prefabricated slab, 9 C25 cast-in-place concrete shoulder protection, 10 is the embankment layer, 11 is the first grade gravel blind ditch, 12 is the water collection pipe, 13 is the water retaining belt, 14 is the second grade gravel blind ditch, and 15 is the prefabricated Keep the pipes.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Referring to Fig. 1, the novel pavement drainage system described in the utility model comprises asphalt concrete upper layer 1, asphalt bonding layer 2, asphalt concrete lower layer 3, drainage base layer 4, waterproof layer 5, sticky layer 6, subbase layer 7, first Graded crushed stone blind ditch 11, water collection pipe 12, C25 concrete prefabricated slab 8, C25 cast-in-place concrete shoulder protection 9, earth layer 10, water retaining belt 13, second graded crushed stone blind ditch 14 and embankment rapid flow trough; The asphalt concrete upper layer 1, asphalt bonding layer 2, asphalt concrete lower layer 3, drainage base 4, waterproof layer 5, sticky layer 6 and subbase 7 are sequentially connected from top to bottom; One side of the subbase 7 is in contact, the two sides of the first graded crushed stone blind ditch 11 are respectively in contact with one side of the drainage base 4 and the side of the C25 cast-in-place concrete shoulder 9, and the other side of the drainage base 4 is in contact with The side of the blind ditch 14 of the second grade is in contact, the bottom surface of the blind ditch 11 of the first grade is in contact with the waterproof layer 5, the bottom surface of the C25 cast-in-place concrete shoulder 9 is in contact with the upper surface of the earth layer 10 and the subbase 7 The upper surface of the C25 concrete prefabricated slab 8 is in contact with the upper surface of the drainage base 4, the upper surface of the first grade crushed stone blind ditch 11 and the upper surface of the C25 cast-in-place concrete shoulder 9, and the C25 concrete The side of the prefabricated slab 8 is in contact with the side of the asphalt concrete upper layer 1, the side of the asphalt bonding layer 2 and the side of the asphalt concrete lower layer 3, and the water blocking belt 13 is located on one side of the upper surface of the asphalt concrete upper layer 1, and the water blocking belt 13 and the C25 concrete prefabricated slab 8 are located on the same side of the asphalt concrete upper layer 1, and the water collection pipe 12 is buried in the first grade crushed stone blind ditch 11, and the outlet of the water collection pipe 12 is connected with the rapid flow groove of the embankment.

It should be noted that the utility model also includes a reserved pipeline 15, which is fixed on the side of the drainage base 4, and the reserved pipeline 15 is located on the same side of the drainage base 4 as the second-graded gravel blind ditch 14, so The height of the reserved pipeline 15 is 15cm, and the width of the reserved pipeline 15 is 20cm; the thickness of the asphalt concrete upper layer 1 is 4cm, and the asphalt concrete upper layer 1 is composed of fine-grained modified asphalt concrete AC-13C; the asphalt bonding layer 2 is made of SBS modified asphalt material, the amount of asphalt bonding layer 2 is 1.5-1.8kg/m ² ; the thickness of the lower layer 3 of asphalt concrete is 6cm, and the lower layer 3 of asphalt concrete is passed through medium-grained asphalt concrete AC-20C Composition; the thickness of the drainage base 4 is 40cm, and the porosity of the drainage base 4 is greater than 17%; the drainage base 4 is made of porous modified concrete; the waterproof layer 5 is a double-sided fiber waterproof membrane; the amount of the adhesive layer 6 is 0.4-0.6 kg/m ² , the adhesive layer 6 is composed of No. 70 asphalt or No. 90 asphalt; the thickness of the base layer 7 is 18cm; the thickness of the C25 concrete prefabricated slab 8 is 10cm; the height of the C25 cast-in-place concrete shoulder 9 is 40cm; the first The porosity of the graded crushed stone blind ditch 11 and the second graded crushed stone blind ditch 14 are both greater than or equal to 25%, and the first graded crushed stone blind ditch 11 and the second graded crushed stone blind ditch 14 are both made of Composed of gravel with a particle size greater than or equal to 4.75 mm; the width of the part of the upper surface of the drainage base 4 that is in contact with the C25 concrete prefabricated slab 8 is 10 cm; the width of the part of the upper surface of the subbase 7 that is in contact with the C25 cast-in-place concrete shoulder 9 is 15cm; the axis of water collecting pipe 12 to the spacing of C25 cast-in-place concrete shoulder 9 is 10cm, water collecting pipe 12 is a PVC water collecting pipe, and the diameter of water collecting pipe 12 is 10cm; the transverse slope of asphalt concrete upper layer 1 is 2 %.

The drainage base 4 is made of porous modified concrete with high-efficiency water permeability, and its function is to effectively eliminate the seepage water infiltrated from the upper layer 1 of asphalt concrete and the lower layer 3 of asphalt concrete, and bear the stress transmitted from the surface layer. The function of the waterproof layer 5 is to prevent the accumulated water on the road surface from further seeping into the base layer 7, which will affect the stability of the base layer 7 and the roadbed. The function of the adhesive layer 6 is to bond the waterproof layer 5 and the base layer 7 into a whole, so as to prevent the waterproof coiled material from sliding during construction. Edge drainage system: the function of the first graded gravel blind ditch 11 is to collect a small amount of road surface water that seeps into the drainage base 4, and then collect the water through the horizontal water collection pipe 12, and then discharge it to the rapid flow groove of the embankment. The C25 concrete prefabricated slab 8, the C25 cast-in-place concrete shoulder 9, and the soil jointly form the soil road shoulder, which acts as a lateral support for the road surface. When the rain on the road surface is too heavy, the water flow is intercepted to the side ditch by the water retaining belt 13 The back row is off the roadbed. When a small amount of infiltrated rainwater passes through the graded crushed stone blind ditch, it is discharged from both sides through the drainage base 4 . The function of the reserved pipeline 15 is to bury communication pipelines.

When there is a large amount of accumulated water on the road surface, the transverse slope (2%) of the road surface is used to collect the water, and it is intercepted by the water retaining belt 13, and it is collected to the embankment rapid flow groove along the longitudinal direction for discharge. Generally, a road embankment rapid flow trough is set every 20m or so, and a road embankment rapid flow trough is set every 12m or so inside the superelevation road section.

When a small amount of road surface water infiltrates from the asphalt surface layer to the drainage base 4, it further infiltrates into the first-stage gravel blind ditch 11, collects the water through the water collection pipe 12, and discharges it to the rapid flow tank of the embankment, and finally discharges it to the roadbed gutter. Generally, a road embankment torrent is set every 20m or so, and a waterproof layer 5 is set between the drainage base 4 and the subbase 7 to prevent rainwater from infiltrating and affecting the stability of the subbase 7 and the subgrade.

Claims (10)

1. A novel pavement drainage system is characterized in that it comprises an asphalt concrete upper layer (1), an asphalt bonding layer (2), an asphalt concrete lower layer (3), a drainage base (4), a waterproof layer (5), an adhesive Layer (6), subbase (7), first-grade crushed stone blind ditch (11), water collection pipe (12), C25 concrete prefabricated slab (8), C25 cast-in-place concrete shoulder protection (9), earth layer (10), water-retaining belt (13), blind ditch of second-grade crushed stone (14) and embankment rapid flow trough; The asphalt concrete upper layer (1), asphalt bonding layer (2), asphalt concrete lower layer (3), drainage base layer (4), waterproof layer (5), adhesive layer (6) and subbase layer (7) from above connected in sequence to the next; The side of the earth-building layer (10) is in contact with one side of the subbase (7), and the two sides of the first graded gravel blind ditch (11) are respectively connected to one side of the drainage base (4) and C25 cast-in-place concrete The side of the shoulder guard (9) is in contact, the other side of the drainage base (4) is in contact with the side of the second graded crushed stone blind ditch (14), and the bottom surface of the first graded crushed stone blind ditch (11) is in contact with the The upper surface of the waterproof layer (5) is in contact, the bottom surface of the C25 cast-in-place concrete shoulder (9) is in contact with the upper surface of the embankment layer (10) and the upper surface of the subbase (7), and the C25 concrete prefabricated slab (8) The lower surface is in contact with the upper surface of the drainage base (4), the upper surface of the first-grade gravel blind ditch (11) and the upper surface of the C25 cast-in-place concrete shoulder (9), and the C25 concrete prefabricated slab (8) The side of the asphalt concrete upper layer (1), the side of the asphalt bonding layer (2) and the side of the asphalt concrete lower layer (3) are in contact, and the water blocking strip (13) is located on the upper surface of the asphalt concrete upper layer (1) On one side, the water blocking belt (13) and the C25 concrete prefabricated slab (8) are located on the same side of the upper layer (1) of asphalt concrete, and the water collection pipe (12) is buried in the first-grade crushed stone blind ditch (11) , the outlet of the water collection pipe (12) communicates with the embankment torrent. 2. novel pavement drainage system according to claim 1, is characterized in that, also comprises reserved pipe (15), reserved pipe (15) is fixed on the side of drainage base (4), reserved pipe (15) and The second graded crushed stone blind ditch (14) is located on the same side of the drainage base (4), the height of the reserved pipeline (15) is 15cm, and the width of the reserved pipeline (15) is 20cm. 3. The novel pavement drainage system according to claim 1, characterized in that, The thickness of the asphalt concrete upper layer (1) is 4cm, and the asphalt concrete upper layer (1) is made of fine-grained modified asphalt concrete AC-13C; The asphalt bonding layer (2) is made of SBS modified asphalt material, and the amount of the asphalt bonding layer (2) is 1.5-1.8kg/m ² ; The thickness of the lower layer of asphalt concrete (3) is 6cm, and the lower layer of asphalt concrete (3) is formed by medium-grain asphalt concrete AC-20C; The thickness of the drainage base (4) is 40 cm, and the porosity of the drainage base (4) is greater than 17%. The drainage base (4) is made of porous modified concrete. 4. The novel pavement drainage system according to claim 1, characterized in that, The waterproof layer (5) is a double-sided fiber waterproof roll; The amount of the adhesive layer (6) is 0.4-0.6kg/m ² , and the adhesive layer (6) is composed of No. 70 asphalt or No. 90 asphalt; The thickness of the base layer (7) is 18cm. 5. The novel pavement drainage system according to claim 1, characterized in that, The thickness of the C25 concrete prefabricated slab (8) is 10cm; The height of the C25 cast-in-place concrete shoulder (9) is 40cm. 6. The novel pavement drainage system according to claim 1, characterized in that, the porosity of the first graded crushed stone blind ditch (11) and the second graded crushed stone blind ditch (14) are equal. Greater than or equal to 25%, the first graded crushed stone blind ditch (11) and the second graded crushed stone blind ditch (14) are both composed of crushed stones with a particle size greater than or equal to 4.75mm. 7. The new pavement drainage system according to claim 1, characterized in that, the width of the part in contact with the C25 concrete prefabricated slab (8) on the upper surface of the drainage base (4) is 10 cm. 8. The new pavement drainage system according to claim 1, characterized in that, the width of the part of the upper surface of the subbase (7) in contact with the C25 cast-in-place concrete shoulder (9) is 15 cm. 9. novel pavement drainage system according to claim 1, is characterized in that, the axis of described water collection pipe (12) to the spacing of C25 cast-in-place concrete shoulder (9) is 10cm, and water collection pipe (12) is PVC water collecting pipe, the diameter of water collecting pipe (12) is 10cm. 10. The novel pavement drainage system according to claim 1, characterized in that, the lateral slope of the asphalt concrete upper layer (1) is 2%.