CN114032733B - Continuous reinforced concrete pavement and anti-break design method thereof - Google Patents
Continuous reinforced concrete pavement and anti-break design method thereof Download PDFInfo
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- CN114032733B CN114032733B CN202111341944.1A CN202111341944A CN114032733B CN 114032733 B CN114032733 B CN 114032733B CN 202111341944 A CN202111341944 A CN 202111341944A CN 114032733 B CN114032733 B CN 114032733B
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 58
- 238000013461 design Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 18
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 86
- 239000004567 concrete Substances 0.000 claims abstract description 49
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 230000002787 reinforcement Effects 0.000 claims description 28
- 230000003014 reinforcing effect Effects 0.000 claims description 18
- 238000012546 transfer Methods 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000011800 void material Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- 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
- E01C11/00—Details of pavings
- E01C11/16—Reinforcements
- E01C11/18—Reinforcements for cement concrete pavings
-
- 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
-
- 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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
Abstract
The invention discloses a continuous reinforced concrete pavement and an anti-break design method thereof. The continuous reinforced concrete pavement provided by the invention is characterized in that a steel bar set is arranged in the concrete pavement, a plurality of edge anti-impact reinforcing steel bars are erected above the steel bar set, the edge anti-impact reinforcing steel bars are positioned at the side edges of the road, L is 2-3 m, and the reinforcing steel bar rate of the edge anti-impact reinforcing steel bars is more than or equal to 0.2%. According to the continuous reinforced concrete pavement provided by the invention, the anti-break reinforcing steel bars are arranged in the range of the edge plate of the pavement slab, so that the capability of the pavement slab for resisting the break of heavy-load and overweight-load vehicles is effectively improved.
Description
Technical Field
The invention relates to the technical field of pavement structures, in particular to a continuous reinforced concrete pavement and an anti-break design method thereof.
Background
Along with the continuous improvement of the development level of the infrastructure in China, the application range of the continuous reinforced concrete pavement is continuously expanded, and the continuous reinforced concrete pavement has become one of main pavement structures of high-grade roads, but the existing standard design method has certain defects, so that the pavement strength is low, and the continuous reinforced concrete pavement is not enough to keep long-time normal service under the background of increasing traffic.
The shortcomings of the current design approach are embodied in the following points: 1. the flexural tensile strength of the concrete is used as a pavement strength control index, the flexural tensile strength of the concrete material is low, the construction quality variability is large, the reliability is low, and the pavement bearing capacity and the reliability are insufficient; 2. the steel bars are arranged near the middle part of the plate thickness, and the effect of improving the bending resistance bearing capacity of the pavement cannot be achieved. Because the bearing capacity of the pavement depends on the flexural tensile strength of concrete, fine soil particles are easy to run off from the roadbed at the bottom of the edge of the continuously reinforced concrete pavement under the repeated action of water suction caused by vehicle load, so that void occurs, a larger transverse negative bending moment is generated on the pavement slab within the range of about 2.5m under the action of vehicle load after the void occurs, the transverse tensile stress of the slab top is rapidly increased, and the pavement is broken and destroyed once the concrete is pulled and cracked; 3. the adverse effect of the void at the edge of the road surface is not considered, and the safety of the road surface under the action of a heavy-duty vehicle cannot be ensured; 4. the repeated action frequency of the concrete slab against the vehicle is low, and fatigue fracture is easy to occur in the edge void area.
Disclosure of Invention
The invention mainly aims to provide a continuous reinforced concrete pavement and an anti-break design method thereof, aiming at reducing the probability of breaking and destroying the pavement.
In order to achieve the above purpose, the invention provides a continuous reinforced concrete pavement, wherein a steel bar set is arranged in the concrete pavement, a plurality of edge anti-impact reinforcing steel bars are erected above the steel bar set, the edge anti-impact reinforcing steel bars are positioned at the side edges of the road, L is 2-3 m, and the reinforcement rate of the edge anti-impact reinforcing steel bars is greater than or equal to 0.2%.
Preferably, a plurality of edge anti-impact reinforcing steel bars are arranged on two sides of the concrete pavement.
Preferably, the edge anti-impact reinforcing steel bars are arranged transversely relative to the concrete pavement.
Preferably, the steel bar set comprises a vertical steel bar, a longitudinal steel bar and a through-length anti-break steel bar, wherein the vertical steel bar is vertically arranged, the longitudinal steel bar is arranged above the vertical steel bar, the through-length anti-break steel bar is transversely arranged relative to the concrete pavement, and the longitudinal steel bar is parallel to the length direction of the concrete pavement.
Preferably, at least two edge anti-break reinforcing steel bars are longitudinally arranged between two adjacent long anti-break reinforcing steel bars.
Preferably, the distance between the edge anti-impact reinforcing steel bars and the full-length anti-impact reinforcing steel bars is 200 mm-300 mm; the distance between the two adjacent anti-impact reinforcing steel bars is 200 mm-300 mm; the diameter of the edge anti-impact reinforcing steel bar is 14-20 mm.
Preferably, the minimum plate thickness of the concrete pavement satisfies the following formula:
wherein h is min To meet the minimum plate thickness required by the design requirement of the limit anti-breaking plate thickness of the overweight vehicle of the road surface plate, Q is the maximum weight of a single wheel possibly occurring, f t The design value of the tensile strength of the concrete of the continuous reinforced concrete slab is that b is the average width of transverse cracks of the continuous reinforced concrete slab, phi is the diameter of the edge anti-break reinforcing steel bar, eta 1 Taking 1.2-1.3 of the impact coefficient of the automobile, eta 2 The load transfer coefficient of the transverse crack of the continuous reinforced concrete slab.
Preferably, the reinforcement ratio of the edge anti-break reinforcing steel bar satisfies the following formula:
wherein ρ is 1 To meet the minimum reinforcement ratio of the anti-break reinforcing steel bar for preventing the break caused by fatigue of the reinforcing steel bar, N v The predicted value of the accumulated action times of the wheel load in the design period of the road is h, the thickness of the continuously reinforced concrete pavement is ρ 2 Not less than 0.2%, and taking rho from the reinforcement ratio of anti-break reinforcing steel bars 1 、ρ 2 Is a larger value of (a).
The invention further provides a method for designing the anti-break of the continuous reinforced concrete pavement, which comprises the following steps:
determining the minimum plate thickness of the concrete pavement according to the maximum wheel load born by the continuous reinforced concrete pavement and the concrete strength grade;
arranging edge anti-impact reinforcing steel bars which are transversely arranged in the concrete pavement, arranging a steel bar set in the concrete pavement, erecting a plurality of edge anti-impact reinforcing steel bars above the steel bar set, and determining the length, the distribution interval and the diameter of the edge anti-impact reinforcing steel bars in the continuous reinforced concrete pavement according to the load of a vehicle;
and determining the reinforcement ratio of the edge anti-impact reinforcing steel bars according to the designed wheel load acting times and the anti-corrosion requirement of the steel bars.
Preferably, the minimum plate thickness of the concrete pavement satisfies the following formula:
wherein h is min To meet the minimum plate thickness required by the design requirement of the limit anti-breaking plate thickness of the overweight vehicle of the road surface plate, Q is the maximum weight of a single wheel possibly occurring, f t The design value of the tensile strength of the concrete of the continuous reinforced concrete slab is that b is the average width of transverse cracks of the continuous reinforced concrete slab, phi is the diameter of the edge anti-break reinforcing steel bar, eta 1 Taking 1.2-1.3 of the impact coefficient of the automobile, eta 2 The load transfer coefficient of the transverse crack of the continuous reinforced concrete slab;
the reinforcement ratio of the edge anti-break reinforcing steel bar meets the following formula:
wherein ρ is 1 To meet the minimum reinforcement ratio of the anti-break reinforcing steel bar for preventing the break caused by fatigue of the reinforcing steel bar, N v The predicted value of the accumulated action times of the wheel load in the design period of the road is h, the thickness of the continuously reinforced concrete pavement is ρ 2 Not less than 0.2%, and taking rho from the reinforcement ratio of anti-break reinforcing steel bars 1 、ρ 2 Is a larger value of (a).
The continuous reinforced concrete pavement provided by the invention has the following beneficial effects:
1) The capability of the road surface for resisting the punching cutting force and the bending moment of the overweight vehicle can be improved, the road surface is prevented from being broken under the action of the overweight vehicle, and the influence on the use and the driving safety of the road surface caused by the broken condition is avoided;
2) The concrete pavement can limit the width of pavement cracks, ensure that the width of the cracks is not more than 0.5mm, prevent water from penetrating, ensure that steel bars cannot be corroded, improve the structural durability and prolong the service life of the pavement;
3) The invention can increase the number of times of vehicle load borne by the road surface and prolong the service life of the road surface.
Drawings
FIG. 1 is a schematic view of a reinforcement structure in a continuous reinforcement concrete pavement of the present invention;
FIG. 2 is a schematic view of a part of the structure of FIG. 1;
FIG. 3 is a schematic view of section A-A of FIG. 1;
FIG. 4 is a schematic view of section B-B of FIG. 1.
In the figure, 1-through long anti-break reinforcing bars, 2-edge anti-break reinforcing bars, 3-erection reinforcing bars and 4-longitudinal reinforcing bars.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be noted that, in the description of the present invention, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention provides a continuous reinforced concrete pavement.
Referring to fig. 1 to 4, a continuous reinforced concrete pavement is provided, wherein a steel bar set is arranged in the concrete pavement, a plurality of edge anti-impact reinforcing steel bars 2 are erected above the steel bar set, the edge anti-impact reinforcing steel bars 2 are positioned at 0-L positions of the side edges of the road (the side edges refer to the edges of the two sides rather than the edges of the head and the tail of the road), L is 2-3 m (preferably 2.5m hogging moment acting area), and the reinforcement rate of the edge anti-impact reinforcing steel bars 2 is greater than or equal to 0.2%.
Under the action of vehicle load, the existing concrete pavement does not consider the larger hogging moment internal force caused by suspending the edge of the pavement slab, and the top of the pavement slab is broken due to the larger hogging moment internal force. According to the invention, through calculation and analysis, the hogging moment bearing capacity of the pavement slab can be greatly improved by arranging the 2-edge anti-impact reinforcing steel bars 2 with the distance D2 = 200 mm-300 mm and the diameter of 14 mm-20 mm at the top of the pavement slab in the hogging moment action area of the side edge L = 0-2.5 m of the pavement. In addition, through increasing the reinforcing bar arrangement rate, the fatigue stress amplitude of the edge anti-break reinforcing bar 2 can be reduced, the number of times of repeated wheel load actions that the reinforcing bar can bear is increased, after the pavement is cracked, as long as the reinforcing bar does not generate fatigue fracture, the reinforcing bar can effectively limit pavement concrete to further crack, the pavement cannot lose bearing capacity, and the bearing can be continued, thereby improving the service life of the pavement. Meanwhile, the reinforcement rate of the reinforcing steel bars is increased, the development of longitudinal cracks of the pavement can be limited, the width of the cracks is not more than 0.5mm, water infiltration is prevented, the edge anti-break reinforcing steel bars 2 are prevented from being corroded, and the structural durability is improved.
Specifically, in this embodiment, a plurality of edge anti-impact reinforcing bars 2 are provided on both sides of the concrete pavement. The edge anti-impact reinforcing steel bars 2 are transversely arranged relative to the concrete pavement.
In this embodiment, referring to fig. 3 and 4, the steel bar set includes a vertical set of stand steel bars 3, a longitudinal steel bar 4 set above the stand steel bars 3, and a through-length anti-break steel bar 1, where the through-length anti-break steel bar 1 is transversely set relative to the concrete pavement, and the longitudinal steel bar 4 is parallel to the length direction of the concrete pavement. The longitudinal steel bars 4 and the through length anti-break steel bars 1 are horizontally arranged.
At least two edge anti-break reinforcing steel bars 2 are longitudinally arranged between two adjacent long anti-break reinforcing steel bars 1. In the present embodiment, two are taken as examples. The distance between the two adjacent edge anti-impact reinforcing steel bars 2 is 200 mm-300 mm (namely D2 in the figure). The diameter of the edge anti-break reinforcing steel bar 2 is 14 mm-20 mm. The distance between the edge anti-break reinforcing steel bar 2 and the full-length anti-break reinforcing steel bar 1 is 200 mm-300 mm.
The minimum plate thickness of the concrete pavement meets the following formula:
wherein h is min To meet the minimum plate thickness required by the design requirement of the limit anti-breaking plate thickness of the overweight vehicle of the road surface plate, Q is the maximum weight of a single wheel possibly occurring, f t The design value of the tensile strength of the concrete of the continuous reinforced concrete slab is that b is the average width of transverse cracks of the continuous reinforced concrete slab, phi is the diameter of the edge anti-break reinforcing steel bar, eta 1 Taking 1.2-1.3 of the impact coefficient of the automobile, eta 2 The load transfer coefficient of the transverse crack of the continuous reinforced concrete slab.
The reinforcement ratio of the edge anti-break reinforcing steel bar 2 satisfies the following formula:
wherein ρ is 1 To meet the minimum reinforcement ratio of the anti-break reinforcing steel bar for preventing the break caused by fatigue of the reinforcing steel bar, N v The predicted value of the accumulated action times of the wheel load in the design period of the road is h, the thickness of the continuously reinforced concrete pavement is ρ 2 Not less than 0.2%, and the reinforcement ratio of the anti-break reinforcing steel bar 2 is ρ 1 、ρ 2 Is a larger value of (a).
The continuous reinforced concrete pavement provided by the invention has the following beneficial effects:
1) The capability of the road surface for resisting the punching cutting force and the bending moment of the overweight vehicle can be improved, the road surface is prevented from being broken under the action of the overweight vehicle, and the influence on the use and the driving safety of the road surface caused by the broken condition is avoided;
2) The concrete pavement can limit the width of pavement cracks, ensure that the width of the cracks is not more than 0.5mm, prevent water from penetrating, ensure that steel bars cannot be corroded, improve the structural durability and prolong the service life of the pavement;
3) The invention can increase the number of times of vehicle load borne by the road surface and prolong the service life of the road surface.
The invention further provides an anti-break design method of the continuous reinforced concrete pavement.
In the preferred embodiment, the anti-break design method of the continuous reinforced concrete pavement comprises the following steps:
determining the minimum plate thickness of the concrete pavement according to the maximum wheel load and the concrete grade borne by the continuous reinforced concrete pavement;
the method comprises the steps that transversely arranged edge anti-impact reinforcing steel bars 2 are arranged in a concrete pavement, a steel bar set is arranged in the concrete pavement, a plurality of edge anti-impact reinforcing steel bars 2 are erected above the steel bar set, the edge anti-impact reinforcing steel bars 2 are located at the side edges of a road, and the length, the distribution interval and the diameter of the edge anti-impact reinforcing steel bars 2 in the continuous reinforced concrete pavement are determined according to the load of a vehicle;
and determining the reinforcement ratio of the edge anti-break reinforcing steel bars 2 according to the designed wheel load times and the anti-corrosion requirement of the steel bars.
In the existing standard design method, the roadbed under the edge roadbed is not considered to be damaged and emptied under the repeated action of water suction caused by vehicle load, the edge of the roadbed is suspended due to the roadbed is empty, the shearing force caused by vehicle load in a plate is increased, and under the action of a heavy-duty vehicle, the roadbed at the suspended position is easy to be sheared, fluctuated and damaged.
Wherein:
h min -a minimum plate thickness (mm) meeting the design requirements of the limit anti-breaking plate thickness of the overweight vehicle of the road deck;
q—the maximum weight (N) of the individual wheels that can occur;
f t -continuousThe design value of the tensile strength of the reinforced concrete slab can be taken according to the current standard (MPa);
b, calculating the average width of the transverse crack of the continuous reinforced concrete slab according to the current specification (mm);
phi-diameter (mm) of the edge anti-break reinforcing steel bar 2;
η 1 taking the impact coefficient of the automobile, taking 1.2-1.3, interpolating according to the running speed of 60 km/h-120 km/h, taking 1.3 when the speed is greater than 120km/h, and taking 1.2 when the speed is less than 60 km/h.
η 2 The load transfer coefficient of the transverse crack of the continuous reinforced concrete slab can be calculated according to the current specification.
The existing standard design method does not consider the larger negative moment internal force caused by the void of the edge of the pavement slab under the action of the load of the vehicle, and the top of the pavement slab is broken due to the larger negative moment internal force. The conventional standard design method is that the steel bars are arranged in the middle of the section of the pavement slab, so that the bending load bearing capacity of the pavement slab cannot be improved, and the bending load bearing capacity of the pavement slab can be greatly improved by arranging the 2-edge anti-break reinforcing steel bars 2 with the distance d2=200 mm-300 mm and the diameter of 14 mm-20 mm at the top of the pavement slab in a hogging moment action area of the side edge L=0-2.5 m of the pavement, so that the edge hogging moment break damage caused by overload of vehicles can be effectively avoided.
The existing specifications do not contain the design of preventing the steel bar from being broken due to fatigue, and the design method is improved. According to the invention, the fatigue damage of the reinforcing steel bar caused by repeated action of the vehicle load is considered, the fatigue stress amplitude of the edge anti-break reinforcing steel bar 2 is reduced by increasing the reinforcement arrangement rate of the reinforcing steel bar, the number of repeated action times of the wheel load which can be borne by the reinforcing steel bar is increased, and after the pavement is cracked, the reinforcing steel bar can effectively limit the pavement concrete to be cracked further as long as the reinforcing steel bar is not subjected to fatigue fracture, the pavement can not lose bearing capacity, and the bearing can be continued, so that the service life of the pavement is prolonged. The invention gives the predicted value N of the accumulated action times of the wheel load in the road design year through calculation and analysis v Reinforcing steel bar 2 reinforcing rate ρ with edge anti-break reinforcing steel bar 1 Calculation formula of (%).
Wherein: ρ 1 The minimum reinforcement ratio (%)
N v Predictive value (time) of accumulated action times of wheel load in road design period
h-continuous reinforced concrete slab thickness (mm)
The present specification design method does not consider the rust-proof design of the transverse steel bar, and the present invention improves. Through configuration edge anti-break reinforcing steel bar 2, the longitudinal crack of restriction road surface is developed, lets crack width be not more than 0.5mm, prevents the infiltration of water, guarantees that edge anti-break reinforcing steel bar 2 can not take place the corrosion, improves structural durability, extension road surface life. The reinforcement ratio value range of the edge anti-break reinforcing steel bar 2 is ρ 2 Is more than or equal to 0.2 percent, and can meet the rust-proof requirement.
The reinforcement ratio of the anti-break reinforcing steel bar 2 should be ρ 1 、ρ 2 Is a larger value of (a).
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but is intended to cover all equivalent structures modifications, direct or indirect application in other related arts, which are included in the scope of the present invention.
Claims (9)
1. A continuous reinforced concrete pavement is characterized in that a steel bar set is arranged in the concrete pavement, a plurality of edge anti-impact reinforcing steel bars are erected above the steel bar set, the edge anti-impact reinforcing steel bars are positioned at 0-L positions of the side edges of the pavement, L is 2-3 m, and the reinforcement rate of the edge anti-impact reinforcing steel bars is greater than or equal to 0.2%; the minimum plate thickness of the concrete pavement meets the following formula:
wherein h is min In order to meet the minimum plate thickness required by the design requirement of the limit anti-breaking plate thickness of the overweight vehicle on the road surface plate, the unit mm and Q are the maximum weight of single wheel which can occur, and the units N and f t The tensile strength design value of the concrete of the continuous reinforced concrete slab is in unit MPa, b is the average width of transverse cracks of the continuous reinforced concrete slab, mm is in unit, phi is the diameter of the edge anti-break reinforcing steel bar, mm is in unit, eta 1 Taking 1.2-1.3 of the impact coefficient of the automobile, eta 2 The load transfer coefficient of the transverse crack of the continuous reinforced concrete slab.
2. The continuous reinforced concrete pavement of claim 1, wherein a plurality of edge anti-impact reinforcing bars are provided on both sides of the concrete pavement.
3. The continuous reinforced concrete pavement of claim 1, wherein the edge anti-ballistic reinforcing bars are disposed transversely with respect to the concrete pavement.
4. A continuous reinforced concrete pavement as set forth in claim 3 wherein said set of rebars comprises vertically disposed stand bars, longitudinal rebars disposed above the stand bars, and through length anti-break rebars disposed transversely relative to the concrete pavement, the longitudinal rebars being disposed parallel to the length of the concrete pavement.
5. A continuous reinforced concrete pavement according to claim 3, wherein at least two edge anti-impact reinforcing bars are longitudinally disposed between adjacent two long anti-impact reinforcing bars.
6. A continuous reinforced concrete pavement according to claim 3, wherein the distance between the edge break-proof reinforcing bars and the through-length break-proof reinforcing bars is 200 mm-300 mm; the diameter of the edge anti-impact reinforcing steel bar is 14-20 mm; the distance between the two adjacent anti-impact reinforcing steel bars is 200 mm-300 mm.
7. The continuous reinforced concrete pavement according to any one of claims 1 to 6, wherein the reinforcement ratio of the edge anti-impact reinforcing bars satisfies the following formula:
wherein ρ is 1 To meet the minimum reinforcement ratio of the edge anti-break reinforcing steel bar for preventing the break caused by fatigue of the reinforcing steel bar, N v The predicted value of the accumulated action times of the wheel load in the design period of the road is h which is the thickness of the continuous reinforced concrete pavement, the unit mm and ρ 2 Equal to 0.2%, the reinforcement ratio of the edge anti-impact reinforcing steel bar is ρ 1 、ρ 2 Is a larger value of (a).
8. A method of designing a continuous reinforced concrete pavement based on any one of claims 1 to 7, comprising the steps of:
determining the minimum plate thickness of the concrete pavement according to the maximum wheel load and the concrete grade borne by the continuous reinforced concrete pavement;
the method comprises the steps that transversely arranged edge anti-impact reinforcing steel bars are arranged in a concrete pavement, a steel bar set is arranged in the concrete pavement, a plurality of edge anti-impact reinforcing steel bars are erected above the steel bar set, the edge anti-impact reinforcing steel bars are located at the side edges of a road, and the length, the distribution interval and the diameter of the edge anti-impact reinforcing steel bars in the continuous reinforced concrete pavement are determined according to the load of a vehicle;
and determining the reinforcement ratio of the edge anti-impact reinforcing steel bars according to the designed wheel load acting times and the anti-corrosion requirement of the steel bars.
9. The method for designing a continuous reinforced concrete pavement according to claim 8, wherein the minimum plate thickness of the concrete pavement satisfies the following formula:
wherein h is min In order to meet the minimum plate thickness required by the design requirement of the limit anti-breaking plate thickness of the overweight vehicle on the road surface plate, the unit mm and Q are the maximum weight of single wheel which can occur, and the units N and f t The tensile strength design value of the concrete of the continuous reinforced concrete slab is in unit MPa, b is the average width of transverse cracks of the continuous reinforced concrete slab, mm is in unit, phi is the diameter of the edge anti-break reinforcing steel bar, mm is in unit, eta 1 Taking 1.2-1.3 of the impact coefficient of the automobile, eta 2 The load transfer coefficient of the transverse crack of the continuous reinforced concrete slab;
the reinforcement ratio of the edge anti-break reinforcing steel bar meets the following formula:
wherein ρ is 1 To meet the minimum reinforcement ratio of the edge anti-break reinforcing steel bar for preventing the break caused by fatigue of the reinforcing steel bar, N v The predicted value of the accumulated action times of the wheel load in the design period of the road is h, the thickness of the continuously reinforced concrete pavement is ρ 2 Equal to 0.2%, the reinforcement ratio of the edge anti-impact reinforcing steel bar is ρ 1 、ρ 2 Is a larger value of (a).
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| CN202111341944.1A CN114032733B (en) | 2021-11-12 | 2021-11-12 | Continuous reinforced concrete pavement and anti-break design method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886360A (en) * | 2009-05-14 | 2010-11-17 | 深圳市海川实业股份有限公司 | Continuous reinforced concrete pavement structure and construction method thereof |
| KR101605512B1 (en) * | 2015-07-01 | 2016-03-29 | 경희대학교 산학협력단 | Construction of continuously reinforced concrete pavements |
| CN205329462U (en) * | 2016-01-31 | 2016-06-22 | 河北工业大学 | Structure is handled to cement concrete pavement seam of wrong platform of prevention inter -plate |
| CN212388284U (en) * | 2020-05-29 | 2021-01-22 | 抚州玉茗远大建筑工业有限公司 | Assembled road plate |
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2021
- 2021-11-12 CN CN202111341944.1A patent/CN114032733B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886360A (en) * | 2009-05-14 | 2010-11-17 | 深圳市海川实业股份有限公司 | Continuous reinforced concrete pavement structure and construction method thereof |
| KR101605512B1 (en) * | 2015-07-01 | 2016-03-29 | 경희대학교 산학협력단 | Construction of continuously reinforced concrete pavements |
| CN205329462U (en) * | 2016-01-31 | 2016-06-22 | 河北工业大学 | Structure is handled to cement concrete pavement seam of wrong platform of prevention inter -plate |
| CN212388284U (en) * | 2020-05-29 | 2021-01-22 | 抚州玉茗远大建筑工业有限公司 | Assembled road plate |
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