CN104480829B - Pavement structure internal draining system for eliminating road surface water seepage - Google Patents

Abstract

The invention discloses an internal drainage system of a pavement structure capable of excluding water seepage from the road surface, comprising a fine-grained modified asphalt concrete AC-13C layer, an SBS modified asphalt bonding layer, a medium-grained asphalt concrete AC-20C layer, and porous modified asphalt concrete. Permanent concrete base, waterproof layer, adhesive layer, cement-stabilized graded crushed stone subbase, C25 concrete prefabricated slab, C25 cast-in-place concrete shoulder, graded crushed stone blind ditch, soil layer and pipeline. The invention is equipped with graded crushed stone blind ditch, which can quickly realize the discharge of seepage water on the road surface.

Description

A pavement structure internal drainage system capable of eliminating water seepage from the pavement surface

technical field

The invention relates to a pavement drainage system, in particular to an internal drainage system of a pavement structure capable of eliminating water seepage from the road surface.

Background technique

In recent years, my country's transportation industry has developed rapidly, and the road network construction has become more and more perfect. However, as an open-air public facility, highways are bound to be subject to multiple effects of the natural environment. Water damage is the phenomenon of damage to the pavement after precipitation enters the pavement structure layer. It is the most common and most destructive of the early diseases of asphalt concrete pavement. one of the diseases.

Generally, the sources of water that need to be drained on the road mainly include surface infiltration water, groundwater, capillary water action, seepage action, water vaporization, etc., among which surface infiltration water is the main source of road surface water. Therefore, the key to road drainage design is to quickly remove road surface water. A lot of research has been done at home and abroad, and high-efficiency permeable materials and reasonable internal drainage systems are used in pavement design in order to reduce the occurrence of water damage.

The traditional asphalt pavement is an impermeable pavement, and a small amount of accumulated water on the road surface cannot be quickly removed after seeping into the pavement base, causing water damage and reducing the service life of the pavement.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and to provide an internal drainage system of the pavement structure that can eliminate water seepage from the road surface.

In order to achieve the above-mentioned purpose, the internal drainage system of the pavement structure that can eliminate the water seepage of the road surface according to the present invention includes a fine-grained modified asphalt concrete AC-13C layer, an SBS modified asphalt bonding layer, and a medium-grained asphalt concrete AC-20C layer , Porous modified concrete base, waterproof layer, adhesive layer, cement-stabilized graded crushed stone subbase, C25 concrete prefabricated slab, C25 cast-in-place concrete shoulder, graded crushed stone blind ditch, soil layer and pipes;

The fine-grained modified asphalt concrete AC-13C layer, SBS modified asphalt bonding layer, medium-grained asphalt concrete AC-20C layer, porous modified concrete base, waterproof layer, sticky layer and cement-stabilized graded gravel bottom The base layer is distributed sequentially from top to bottom;

One side of the soil layer is in contact with one side of the cement-stabilized graded crushed stone subbase, and the two sides of the graded crushed stone blind ditch layer are respectively connected to the side of the porous modified concrete base and the side of the C25 cast-in-place concrete shoulder Contact, the bottom of the graded crushed stone blind ditch is in contact with the upper surface of the waterproof layer, the bottom surface of the C25 cast-in-place concrete shoulder is in contact with the upper surface of the cement stabilized graded crushed stone subbase and the upper surface of the earth layer, C25 The bottom surface of the concrete precast slab is in contact with the upper surface of the porous modified concrete base, the upper surface of the graded 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 fine-grained modified asphalt The side of the concrete AC-13C layer, the side of the SBS modified asphalt bonding layer and the side of the medium-grained asphalt concrete AC-20C layer are in contact, and the pipe passes through the C25 cast-in-place concrete shoulder and is inserted into the bottom of the graded gravel blind ditch , the upper surface of the C25 concrete prefabricated slab is flush with the upper surface of the fine-grained modified asphalt concrete AC-13C layer.

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

The thickness of the medium-grain asphalt concrete AC-20C layer is 6cm;

The thickness of the porous modified concrete base is 40cm;

The thickness of the cement-stabilized graded gravel base course is 18cm;

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

The pipeline is a PVC pipe with a diameter of 5 cm.

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

The amount of the sticky layer is 0.4-0.6kg/m ² .

The waterproof layer is a double-sided fiber waterproof roll.

The porosity of the porous modified concrete base is greater than 17%.

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

The width of the portion of the upper surface of the cement-stabilized graded gravel base course that is in contact with the lower surface of the graded gravel blind ditch is 15 cm.

The cross-section of the graded crushed stone blind ditch and the cross-section of the C25 cast-in-place concrete shoulder are both right-angled trapezoidal.

The particle size of the crushed stones in the blind ditch of the graded crushed stones is greater than or equal to 4.75 mm.

The present invention has the following beneficial effects:

The internal drainage system of the pavement structure of the present invention, which can eliminate water seepage from the road surface, utilizes the characteristics of large voids and high water permeability of the graded crushed stone blind ditch to collect the seepage water from the porous modified concrete base layer under the road surface, and It is discharged to the outside of the road surface through pipes, so as to realize the discharge of water seepage on the road surface. At the same time, a waterproof layer is set between the porous modified concrete base and the cement stabilized graded gravel subbase to prevent rainwater from seeping down and affecting the cement stabilized graded gravel base. The stability of the base layer can effectively improve the service life of the pavement. Moreover, the construction is simple and the drainage capacity is strong.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Among them, 1 is the fine-grained modified asphalt concrete AC-13C layer, 2 is the SBS modified asphalt bonding layer, 3 is the medium-grained asphalt concrete AC-20C layer, 4 is the porous modified concrete base, 5 is the waterproof layer, 6 is the adhesive layer, 7 is the cement-stabilized graded gravel subbase, 8 is the C25 concrete prefabricated slab, 9 is the C25 cast-in-place concrete shoulder protection, 10 is the graded gravel blind ditch, 11 is the earth layer, and 12 is the pipeline.

detailed description

The present invention is described in further detail below in conjunction with accompanying drawing:

Referring to Fig. 1, the internal drainage system of the pavement structure according to the present invention, which can exclude water seepage from the road surface, includes fine-grained modified asphalt concrete AC-13C layer 1, SBS modified asphalt bonding layer 2, medium-grained asphalt concrete AC-20C Layer 3, porous modified concrete base 4, waterproof layer 5, adhesive layer 6, cement-stabilized graded crushed stone base layer 7, C25 concrete prefabricated slab 8, C25 cast-in-place concrete shoulder protection 9, graded crushed stone blind ditch 10, Cultivation layer 11 and pipeline 12; the fine-grained modified asphalt concrete AC-13C layer 1, SBS modified asphalt bonding layer 2, medium-grained asphalt concrete AC-20C layer 3, porous modified concrete base 4, waterproof layer 5. The sticky layer 6 and the cement-stabilized graded gravel subbase 7 are distributed sequentially from top to bottom; one side of the embankment layer 11 is in contact with one side of the cement-stabilized graded gravel subbase 7, and the graded gravel The two sides of the blind ditch 10 are in contact with the side of the porous modified concrete base 4 and the side of the C25 cast-in-place concrete shoulder 9 respectively, and the bottom of the graded crushed stone blind ditch 10 is in contact with the upper surface of the waterproof layer 5, C25 The bottom surface of the cast-in-place concrete shoulder 9 is in contact with the upper surface of the cement stabilized graded crushed stone subbase 7 and the upper surface of the earth layer 11, and the bottom surface of the C25 concrete prefabricated slab 8 is in contact with the upper surface of the porous modified concrete base 4, the grade The upper surface of the crushed stone blind ditch 10 is in contact with the upper surface of the C25 cast-in-place concrete shoulder 9, and the side of the C25 concrete prefabricated slab 8 is in contact with the side of the fine-grained modified asphalt concrete AC-13C layer 1, SBS modified asphalt The side of the adhesive layer 2 is in contact with the side of the medium-grained asphalt concrete AC-20C layer 3, the pipe 12 passes through the C25 cast-in-place concrete shoulder 9 and is inserted into the bottom of the graded crushed stone blind ditch 10, and the C25 concrete prefabricated slab 8 The upper surface is flush with the upper surface of the AC-13C layer 1 of fine-grained modified asphalt concrete.

It should be noted that the thickness of the fine-grained modified asphalt concrete AC-13C layer 1 is 4cm; the thickness of the medium-grained asphalt concrete AC-20C layer 3 is 6cm; the thickness of the porous modified concrete base 4 is 40cm; The thickness of the cement-stabilized graded crushed stone subbase 7 is 18 cm; the thickness of the C25 concrete prefabricated slab 8 is 10 cm, the pipe 12 is a PVC pipe, the diameter of the pipe 12 is 5 cm, and the amount of the SBS modified asphalt bonding layer 2 is 1.5 to 1.8 kg/m ² , the amount of the adhesive layer 6 is 0.4-0.6kg/m ² , the waterproof layer 5 is a double-sided fiber waterproof membrane, the porosity of the porous modified concrete base 4 is greater than 17%, and the porous modified concrete base 4 is The width of the part in contact with the lower surface of the C25 concrete prefabricated slab 8 on the surface is 10 cm, and the width of the part in contact with the lower surface of the cement-stabilized graded crushed stone subbase 7 on the upper surface and the lower surface of the graded crushed stone blind ditch 10 is 15 cm. The cross section of the gravel blind ditch 10 and the cross section of the C25 cast-in-place concrete shoulder 9 are right-angled trapezoids, and the particle size of the gravel in the graded gravel blind ditch 10 is greater than or equal to 4.75mm.

When precipitation or other accidents cause water accumulation on the road surface, most of the water accumulation on the road surface overflows through the transverse slope to the asphalt concrete water retaining belt, and is discharged to the rapid flow trough along the longitudinal direction. A small amount of road surface water penetrates into the porous modified concrete base 4 through the fine-grained modified asphalt concrete AC-13C layer 1 and the medium-grained asphalt concrete AC-20C layer 3, and then further seeps into the graded crushed stone blind ditch 10, Then it is discharged to the embankment rapids through the pipeline 12, and finally discharged to the subgrade drainage ditch. Generally, a road embankment rapids is set every 20m or so, and a waterproof layer 5 is set between the drainage base and the cement stable graded crushed stone base 7. Prevent rainwater from infiltrating and affecting the stability of subbase and roadbed.

Claims (3)

1. it is a kind of to exclude the pavement structure internal drainage system that road table seeps water, it is characterised in that including particulate formula modified pitch Concrete C-13C layers (1), SBS modified pitch gluing layers (2), middle grain formula bituminous concrete AC-20C layers (3), porous is modified mixed Solidifying soil matrix layer (4), waterproof layer (5), adhesion coating (6), cement stabilized grading crushed stones underlayment (7), C25 concrete prefabricated boards (8), C25 cast-in-place concrete shoulder protectors (9), graded broken stone french drain (10), ridging layer (11) and pipeline (12)；

Particulate formula modified asphalt concrete AC-13C layers (1), SBS modified pitch gluing layers (2), middle grain formula bituminous concrete AC-20C layers (3), porous modified concrete basic unit (4), waterproof layer (5), adhesion coating (6) and cement stabilized grading crushed stones underlayment (7) it is sequentially distributed from top to bottom；

The one side of ridging layer (11) contacts with the one side of cement stabilized grading crushed stones underlayment (7), graded broken stone The two sides of french drain (10) layer respectively with the side and the side of C25 cast-in-place concrete shoulder protectors (9) of porous modified concrete basic unit (4) Face contacts, and the bottom of graded broken stone french drain (10) contacts with the upper surface of waterproof layer (5), C25 cast-in-place concrete shoulder protectors (9) The upper surface of bottom surface and cement stabilized grading crushed stones underlayment (7) and the upper surface of ridging layer (11) contact, C25 concrete The bottom surface of precoated plate (8) and the upper surface of porous modified concrete basic unit (4), the upper surface of graded broken stone french drain (10) and C25 The upper surface of cast-in-place concrete shoulder protector (9) contacts, side and the particulate formula modified pitch coagulation of C25 concrete prefabricated boards (8) The side of native AC-13C layers (1), the side of SBS modified pitch gluing layers (2) and middle grain formula bituminous concrete AC-20C layers (3) Side contacts, and pipeline (12) is inserted into the bottom of graded broken stone french drain (10) through C25 cast-in-place concrete shoulder protectors (9), and C25 is mixed The upper surface of solidifying soil precoated plate (8) and the upper surface flush of particulate formula modified asphalt concrete AC-13C layers (1)；

The amount of the SBS modified pitch gluing layer (2) is 1.5～1.8kg/m²；

The amount of the adhesion coating (6) is 0.4-0.6kg/m²；

The waterproof layer (5) is double-side fibre waterproof roll；

The porosity of the porous modified concrete basic unit (4) is more than 17%；

The thickness of particulate formula modified asphalt concrete AC-13C layers (1) is 4cm；

The thickness of middle grain formula bituminous concrete AC-20C layers (3) is 6cm；

The thickness of the porous modified concrete basic unit (4) is 40cm；

The thickness of the cement stabilized grading crushed stones underlayment (7) is 18cm；

The thickness of the C25 concrete prefabricated boards (8) is 10cm；

The pipeline (12) is pvc pipe, a diameter of 5cm of pipeline (12)；

Contact part on porous modified concrete basic unit (4) upper surface with the lower surface of C25 concrete prefabricated boards (8) Width is 10cm；

Contact part on cement stabilized grading crushed stones underlayment (7) upper surface with graded broken stone french drain (10) lower surface Width is 15cm；

When there is precipitation or other surprisingly cause road table hydrops, most of road table hydrops are by horizontal wall inscription cross flow to bituminous concrete Water band is blocked, and is converged to chute discharge along longitudinal direction；A small amount of road table water by particulate formula modified asphalt concrete AC-13C floor (1) and It is seeped into after porous modified concrete basic unit (4) under middle grain formula bituminous concrete AC-20C layers (3), further seepage flow is to graded broken stone French drain (10), then drains into embankment chute by pipeline (12), and final concentration drains into subgrade drainage ditch.

2. it is according to claim 1 to exclude the pavement structure internal drainage system that road table seeps water, it is characterised in that described The cross section of graded broken stone french drain (10) cross section and C25 cast-in-place concrete shoulder protectors (9) is right-angled trapezium.

3. it is according to claim 1 to exclude the pavement structure internal drainage system that road table seeps water, it is characterised in that described The particle diameter of the interior rubble of graded broken stone french drain (10) is more than or equal to 4.75mm.