Full-permeable continuous reinforced concrete surface layer combining seepage and drainage

Abstract

The application discloses a kind of full permeable continuous reinforced concrete surface layer of seepage and drainage combination, including pervious concrete slab and longitudinal and transverse continuous reinforcement net;The longitudinal and transverse continuous reinforcement net includes longitudinal reinforcement, transverse reinforcement, erects reinforcement;Longitudinal reinforcement, transverse reinforcement are all water-penetrating rust-proof steel, water-penetrating rust-proof steel includes the steel wall of water-penetrating hole, and hollow drainage hole is equipped in steel wall;The thickness r1 of steel wall is more than 6mm, and the diameter d2 of hollow drainage hole is 6~14mm;Longitudinal rib and cross rib are equipped on water-penetrating rust-proof steel;Transverse reinforcement is connected with longitudinal reinforcement;One end of transverse reinforcement is connected with the transverse reinforcement of adjacent pervious concrete slab, and the other end is inserted into roadside green belt through curbstone;Erects reinforcement and is placed on cushion, and the other end is connected with transverse reinforcement.The application can solve the problems of continuous reinforced concrete surface layer steel rust prevention difficulty, insufficient density of pervious concrete, water-penetrating pavement cannot quickly drain accumulated water and the like.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of road engineering, and particularly relates to a full-transmission continuous reinforced concrete surface layer combining seepage and drainage. BACKGROUND

[0002] Continuous reinforced concrete pavement (CRCP) is a pavement structure with continuous longitudinal reinforcement and no transverse contraction joint, which overcomes the driving discomfort and various diseases caused by numerous joints in ordinary concrete slabs, forms a long flat driving surface, and has the advantages of strong bearing capacity, good integrity, long service life and less maintenance and repair, and is one of the main structural forms of heavy traffic pavement under the current environment and conditions in China. However, the existing continuous reinforced concrete pavement has the following problems: 1. difficulty in rust prevention of steel bars; 2. insufficient density of the connection between pervious concrete and steel bars, and wide cracks in the surface layer, which makes the full-transmission continuous reinforced concrete layer not strong in integrity; and 3. the pavement cannot quickly drain accumulated water because the steel bars are densely arranged and the steel bars and the concrete around the steel bars are not pervious to water. Therefore, it is difficult to apply the sponge city technology to the continuous reinforced concrete pavement.

[0003] In view of the above problems, the patent with the patent name of a full-transmission pavement structure and the publication number of CN107604786A applies the sponge city technology by adding pervious holes in the gaps of continuous reinforcement. However, because the reinforcement ratio of the continuous reinforced concrete pavement is high and the steel bars are dense, the area of the pervious holes (the application area of the sponge city) accounts for only 15% to 30% of the area of the pavement, the pervious effect is insufficient, it is difficult to quickly seep and drain rainwater, and the sponge city effect cannot be achieved. In addition, because the pervious holes are filled with graded gravel, the integrity of the continuous reinforced concrete layer is insufficient, the strength difference is obvious, and the continuous reinforced concrete layer cannot be used in the surface layer structure, and the applicability to the road with the traffic load grade of extra-heavy and super-heavy is insufficient.

[0004] Therefore, there is an urgent need for a new continuous reinforced concrete pavement. SUMMARY

[0005] The main purpose of the application is to provide a full-transmission continuous reinforced concrete surface layer combining seepage and drainage, which can comprehensively solve the problems of difficulty in rust prevention of steel bars in the continuous reinforced concrete surface layer, insufficient density of pervious concrete, and inability of the pervious pavement to quickly drain accumulated water.

[0006] The technical scheme adopted by the application is as follows:

[0007] A full-transmission continuous reinforced concrete surface layer combining seepage and drainage, comprising a pervious concrete slab and a longitudinal and transverse continuous steel bar mesh arranged in the pervious concrete slab; the longitudinal and transverse continuous steel bar mesh comprises longitudinal steel bars, transverse steel bars and upright steel bars.

[0008] The longitudinal steel bars and the transverse steel bars are water-permeable rustproof steel bars, the water-permeable rustproof steel bar comprises a steel bar wall with water-permeable holes, a hollow drainage hole is arranged in the steel bar wall, an overhanging part is arranged on the steel bar wall, the overhanging part is provided with a drainage hole which is in communication with the hollow drainage hole; the thickness r1 of the steel bar wall is greater than 6 mm, and the diameter d2 of the hollow drainage hole is 6-14 mm; longitudinal ribs are arranged on the upper and lower surfaces of the water-permeable rustproof steel bar along the length direction of the water-permeable rustproof steel bar; a plurality of transverse ribs are arranged on the left and right surfaces of the water-permeable rustproof steel bar.

[0009] The longitudinal steel bars are arranged along the longitudinal direction of the road and are parallel to the longitudinal slope surface of the road.

[0010] The transverse steel bars are arranged below the longitudinal steel bars and along the transverse direction of the road and are parallel to the transverse slope surface of the road; the overhanging part of the longitudinal steel bar is connected with the overhanging part of the transverse steel bar through a water-proof rustproof sleeve; one end of the transverse steel bar is connected with the transverse steel bar of the adjacent water-permeable concrete slab, and the other end of the transverse steel bar penetrates through the curb and extends into the roadside green belt, and a filter cloth is arranged at the end.

[0011] The upright steel bars are arranged on the cushion layer and are connected with the transverse steel bars at the other ends.

[0012] In a further aspect, the thickness H of the water-permeable concrete slab is 22-30 cm, the width B of the slab is 3-4.5 m, and the length L of the slab is greater than 1 km, and the specific size can be selected according to the required pavement structure thickness and road width of the engineering practice.

[0013] In a further aspect, the water-permeable concrete slab is a sand-free porous concrete, so that the surface layer can better permeate and drain water; the diameters of the longitudinal steel bars and the transverse steel bars are 18-26 mm, so as to ensure the strength of the surface layer.

[0014] In a further aspect, the longitudinal steel bars are arranged at a distance of not less than 90 mm from the top surface of the cement concrete slab, and the maximum depth is not greater than 1 / 2 of the thickness of the cement concrete slab, so as to ensure the strength of the surface layer without affecting the vehicles running thereon.

[0015] In a further aspect, the steel bar spacing of the longitudinal steel bars is 12-16 cm, so as to ensure the strength of the surface layer.

[0016] In a further aspect, the steel bar spacing of the transverse steel bars is 30-80 cm, the steel bar spacing at the high elevation is large, and the steel bar spacing at the low elevation is small; the length of the transverse steel bar extending out of the curb is 20-40 cm, so as to drain water into the green belt and ensure the stability of the surface layer.

[0017] In a further aspect, the diameter of the water-permeable hole is 0.05-0.2 mm, so as to drain water from the surface layer.

[0018] Further, the cross section of the longitudinal rib is trapezoidal, the height h1 is 3-5mm, and the width a is 3-5mm; the cross section of the transverse rib is crescent, the height h is 3-5mm, and the maximum width b is 2-3mm; the friction between the ribbed steel bar and the pervious concrete is increased, the integrity of the two is ensured, wide cracks on the surface layer are avoided, and the service life of the surface layer is improved.

[0019] Further, the diameter of the overhanging part of the longitudinal and transverse steel bars and the pattern of the hollow drainage hole are consistent, the length of the overhanging part of the longitudinal and transverse steel bars is 5-10mm, the spacing of the overhanging part of the longitudinal steel bar is consistent with the spacing of the transverse steel bar, and the spacing of the overhanging part of the transverse steel bar is consistent with the spacing of the longitudinal steel bar.

[0020] The seepage and drainage are as follows:

[0021] 1) During rainfall, rainwater seeps into the pavement structure through the pervious concrete slab;

[0022] 2) By using the "capillary" phenomenon and the "siphon" principle, part of the accumulated water in the pervious concrete slab penetrates into the hollow drainage hole through the pervious hole provided by the longitudinal and transverse steel bars, part of the accumulated water is retained, and evaporates back into the atmosphere;

[0023] 3) By using the longitudinal slope of the road, the water flow in the hollow drainage hole of the longitudinal steel bar converges towards the low place, and is discharged into the transverse steel bar by the overhanging part and the rust-proof sleeve; by using the transverse slope of the road, the water flow in the hollow drainage hole of the transverse steel bar converges towards the edge of the road, and is discharged into the roadside green belt through the transverse steel bar penetrating the curb stone as irrigation water.

[0024] The beneficial effects of the present application are as follows:

[0025] The present application is composed of a pervious concrete slab and a pervious rust-proof steel bar, the pervious area (sponge city application area) accounts for 100% of the pavement area, which can effectively ensure that the pavement in the rainy season in the southern rainy area does not accumulate water; the problem that the existing steel bar and the concrete around the steel bar are not pervious, and the pavement cannot quickly discharge accumulated water is solved;

[0026] The seepage and drainage system is composed of a special structure steel bar (steel bar with a pervious hole, hollow drainage hole, overhanging part), so that the steel bar can simply discharge rainwater, and realize the "seepage and drainage combination" function of the sponge city;

[0027] The longitudinal rib and the transverse rib are provided on the pervious rust-proof steel bar, that is, the longitudinal and transverse steel bars are all enhanced ribbed steel bars, the friction between the steel bar and the pervious concrete is increased, the combination of the steel bar and the pervious concrete slab is more close, the integrity of the two is ensured, wide cracks on the surface layer are avoided, the whole pervious type continuous reinforced concrete layer has high integrity and uniform strength, and is suitable for surface layer structures of special heavy and super heavy traffic load grades;

[0028] The water-permeable rust-proof steel solves the problem of rust prevention of the continuous reinforced concrete surface layer, and improves the service life of the full-permeable continuous reinforced concrete surface layer.

[0029] A rainwater infiltration and drainage system is integrated in the continuous reinforced concrete surface layer, rainwater can quickly infiltrate into the continuous reinforced concrete surface layer, and can also directly and simply drain the rainwater in the continuous reinforced concrete surface layer into the roadside green belt, fully realizing the "infiltration and drainage combination" function of the sponge city.

[0030] The steel is rust-proof steel, avoiding rust of the steel caused by water permeation; the water-permeable rust-proof steel utilizes the "capillary" phenomenon and "siphon" principle to quickly permeate the accumulated water in the water-permeable concrete layer into the hollow drainage hole of the steel, improving the drainage efficiency of the surface layer. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0032] Figure 1 is a structural schematic diagram of the full-permeable continuous reinforced concrete surface layer of infiltration and drainage combination;

[0033] Figure 2 is Figure 1 is a I-I sectional view in the figure;

[0034] Figure 3 is a sectional view of the longitudinal steel and the transverse steel;

[0035] Figure 4 is a sectional view of the longitudinal steel and the transverse steel;

[0036] Figure 5 is a schematic diagram of the connecting structure of the longitudinal steel and the transverse steel;

[0037] Figure 6 is a schematic diagram of the curb stone side transverse steel structure;

[0038] Figure 7 is a schematic diagram of rainwater infiltration and drainage;

[0039] In the figure: 1, water-permeable concrete plate, 2, longitudinal steel, 3, transverse steel, 4, erected steel, 5, water-permeable rust-proof steel, 6, steel wall, 7, water-permeable hole, 8, hollow drainage hole, 9, overhanging part, 10, water-proof rust-proof steel sleeve, 11, longitudinal rib, 12, transverse rib, 13, curb stone, 14, roadside green belt, 15, inverse filtration geotextile, 16, longitudinal construction joint. DETAILED DESCRIPTION

[0040] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0041] Referring to Figures 1-7 A kind of full permeable continuous reinforced concrete surface of seepage and drainage combination, including water permeable concrete slab 1 and longitudinal and transverse continuous reinforcement net placed in water permeable concrete slab 1, which includes longitudinal reinforcement 2, transverse reinforcement 3, erect reinforcement 4.

[0042] Longitudinal reinforcement 2 and transverse reinforcement 3 are all water permeable rustproof steel bars 5 with diameter of 21mm.Water permeable rustproof steel bar 5 includes steel bar wall 6 with water permeable hole 7 with diameter of 0.05-0.2mm, hollow drainage hole 8 is arranged in steel bar wall 6, and overhanging part 9 is arranged on steel bar wall 6.Overhanging part 9 is arranged with drainage hole, which is communicated with hollow drainage hole 8 in steel bar wall 6.The thickness r1 of steel bar wall 6 is 6mm, and the diameter d2 of hollow drainage hole 8 is 9mm.Longitudinal rib 11 is arranged on the upper and lower surfaces of water permeable rustproof steel bar 5 along the length direction of water permeable rustproof steel bar 5, and a plurality of transverse ribs 12 are arranged on the left and right surfaces of water permeable rustproof steel bar 5.Longitudinal reinforcement 2 is arranged along the longitudinal direction of road, and is parallel to the longitudinal slope surface of road, i.e., longitudinal reinforcement 2 also has a certain slope, and the slope is consistent with the slope of the longitudinal slope surface of road.Transverse reinforcement 3 is arranged below longitudinal reinforcement 2, and is arranged along the transverse direction of road, and is parallel to the transverse slope surface of road, i.e., transverse reinforcement 3 also has a certain slope, and the slope is consistent with the slope of the transverse slope surface of road.Overhanging part 9 of longitudinal reinforcement 2 is connected with overhanging part 9 of transverse reinforcement 3 through water-proof rustproof sleeve 10.One end of transverse reinforcement 3 is connected with the transverse reinforcement of adjacent water permeable concrete slab, and the other end penetrates through curb 13 and extends into roadside green belt 14, and anti-filtration geotextile 15 is arranged at the end of the transverse reinforcement.Rainwater seeps into from the top of water permeable concrete slab 1, and water permeable rustproof steel bar 5 uses "capillary" phenomenon and "siphon" principle to quickly permeate the accumulated water in water permeable concrete slab 1 into hollow drainage hole 8 of water permeable rustproof steel bar 5, i.e., rainwater enters hollow drainage hole 8 of longitudinal reinforcement 2 and transverse reinforcement, and the water in longitudinal reinforcement 2 flows into hollow drainage hole 8 of transverse reinforcement through overhanging part 9;hollow drainage hole 8 of transverse reinforcement drains water into roadside green belt 14 to water roadside green belt 14.

[0043] One end of erect reinforcement 4 is arranged on cushion, and the other end is connected with transverse reinforcement 3 to play a supporting role.

[0044] Water permeable concrete slab 1 is sandless porous concrete, and the thickness H is 22-30cm, the slab width B is 3-4.5m, and the slab length L is more than 1km.

[0045] In order to ensure the strength of the surface layer and not affect the vehicles driving thereon, the spacing of the longitudinal steel bars 2 is 12-16 cm, and the distance from the top surface of the cement concrete slab 1 is not less than 90 mm, and the maximum depth is not greater than 1 / 2 of the thickness of the cement concrete slab. In order to ensure the stability of the surface layer, the spacing of the transverse steel bars 3 is 30-80 cm, the spacing of the steel bars at the high elevation is large, and the spacing of the steel bars at the low elevation is small; the length of the transverse steel bars 3 extending out of the curb 13 is 20-40 cm, so as to facilitate the drainage of water into the green belt. In order to increase the friction between the ribbed steel bar and the pervious concrete, ensure the integrity of the two, avoid wide cracks in the surface layer, and improve the service life of the surface layer, the cross section of the longitudinal rib 11 is trapezoidal, the height h1 is 3-5 mm, and the width a is 3-5 mm. The cross section of the transverse rib 12 is crescent-shaped, the height h is 3-5 mm, and the maximum width b is 2-3 mm.

[0046] In the present application, the diameter of the drainage hole of the outer extension part 9 of the longitudinal and transverse steel bars is consistent with the hollow drainage hole, and the length of the outer extension part 9 of the longitudinal steel bars 2 and the transverse steel bars 3 is 5-10 mm; the spacing of the outer extension part 9 of the longitudinal steel bars 2 is consistent with the spacing of the transverse steel bars 3, and the spacing of the outer extension part 9 of the transverse steel bars 3 is consistent with the spacing of the longitudinal steel bars 2.

[0047] There is a longitudinal construction joint 16 between the adjacent full-pervious continuous reinforced concrete surface layers combined by seepage and drainage.

[0048] It should be understood that, for those skilled in the art, improvements or changes can be made according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the present application.

Claims

1. A full-permeable continuous reinforced concrete pavement with combined drainage and reinforcement, comprising a pervious concrete slab and a longitudinal and transverse continuous steel mesh arranged in the pervious concrete slab, characterized in that: the longitudinal and transverse continuous steel mesh comprises longitudinal steel bars, transverse steel bars and upright steel bars; the longitudinal steel bars and the transverse steel bars are both pervious and rustproof steel bars, the pervious and rustproof steel bar comprises a steel bar wall with pervious holes, a hollow drainage hole is arranged in the steel bar wall, an outward extension is arranged on the steel bar wall, the outward extension is provided with a drainage hole which is in communication with the hollow drainage hole, the thickness r1 of the steel bar wall is greater than 6 mm, and the diameter d2 of the hollow drainage hole is 6-14 mm; longitudinal ribs are arranged on the upper and lower surfaces of the pervious and rustproof steel bar along the length direction of the pervious and rustproof steel bar; a plurality of transverse ribs are arranged on the left and right surfaces of the pervious and rustproof steel bar; the diameter of the pervious hole is 0.05-0.2 mm; the cross section of the longitudinal rib is trapezoidal, the height h1 of the trapezoidal longitudinal rib is 3-5 mm, and the width a of the trapezoidal longitudinal rib is 3-5 mm; the cross section of the transverse rib is crescent-shaped, the height h of the crescent-shaped transverse rib is 3-5 mm, and the maximum width b of the crescent-shaped transverse rib is 2-3 mm; the length of the outward extension of the longitudinal steel bar and the length of the outward extension of the transverse steel bar are 5-10 mm; the spacing of the outward extensions of the longitudinal steel bars is consistent with the spacing of the transverse steel bars, and the spacing of the outward extensions of the transverse steel bars is consistent with the spacing of the longitudinal steel bars; the longitudinal steel bars are arranged along the longitudinal direction of the road and are parallel to the longitudinal slope surface of the road; the transverse steel bars are arranged below the longitudinal steel bars along the transverse direction of the road and are parallel to the transverse slope surface of the road; the outward extension of the longitudinal steel bar is connected with the outward extension of the transverse steel bar through a water-closed rustproof sleeve; one end of the transverse steel bar is connected with the transverse steel bar of the adjacent pervious concrete slab, the other end of the transverse steel bar penetrates through the curb and extends into the roadside green belt, and a filter cloth is arranged at the end of the transverse steel bar; one end of the upright steel bar is arranged on the cushion layer, and the other end of the upright steel bar is connected with the transverse steel bar; the thickness H of the pervious concrete slab is 22-30 cm, the width B of the pervious concrete slab is 3-4.5 m, and the length L of the pervious concrete slab is greater than 1 km; the pervious concrete slab is a sandless porous concrete; the distance between the longitudinal steel bars and the top surface of the cement concrete slab is not less than 90 mm, and the maximum depth is not greater than 1 / 2 of the thickness of the cement concrete slab; the spacing of the longitudinal steel bars is 12-16 cm; the spacing of the transverse steel bars is 30-80 cm, and the length of the transverse steel bar extending out of the curb is 20-40 cm. ​ ​ ​ ​ ​ ​ 2. The combined pervious and impervious full-transpiration continuously reinforced concrete pavement of claim 1, wherein: ​ 3. The fully permeable continuous reinforced concrete pavement with drainage and reinforcement according to claim 1 or 2, characterized in that: ​ 4. The combined pervious and impervious full-transpiration continuously reinforced concrete pavement of claim 1, wherein: ​ 5. The fully permeable continuous reinforced concrete pavement with drainage and reinforcement according to claim 1 or 4, characterized in that: ​ 6. The combined pervious and impervious full permeable continuous reinforced concrete pavement of claim 1, wherein: ​

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