CN115033965A - Design method of flexible heating cable grooving vehicle for melting ice and snow at road turning section - Google Patents

Design method of flexible heating cable grooving vehicle for melting ice and snow at road turning section Download PDF

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CN115033965A
CN115033965A CN202210725063.8A CN202210725063A CN115033965A CN 115033965 A CN115033965 A CN 115033965A CN 202210725063 A CN202210725063 A CN 202210725063A CN 115033965 A CN115033965 A CN 115033965A
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CN115033965B (en
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丁伟伦
刘凯
赵俊仁
周蕴苇
鲍承志
向佳
汪师培
张玄成
黄沐阳
傅朝亮
张祥
黄思路
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Hefei University of Technology
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Abstract

The invention discloses a design method of a flexible heating cable grooving vehicle for melting ice and snow at a road turning section, which specifically comprises the following steps: determining road parameters and vehicle parameters; measuring the cross slope angle of the road; calculating a road widening value and a cross section ultrahigh value; calculating the distance between grooves required by the heating cable and determining the depth of the notch; calculating the number of grooves required to be increased for adapting to road widening; and calculating the rotation angle required by the carving tool suitable for the road ultrahigh value. The invention solves the problems that the existing road grooving device cannot adapt to ultrahigh widening of a road and cannot accurately control the distance between grooves required by heating cables, thereby improving the paving and working effects of the heating cables and reducing the ice and snow melting efficiency of the heating cables, and lays a solid foundation for large-scale application of the heating cable snow melting road.

Description

Design method of flexible heating cable grooving vehicle for melting ice and snow at road turning section
Technical Field
The invention belongs to the technical field of road construction vehicle design, and particularly relates to a design method of a flexible heating cable grooving vehicle for melting ice and snow at a road turning section.
Background
Road freezing and snow accumulation in winter or low-temperature areas seriously affect road traffic and normal outdoor activities and work of people. At present, road ice and snow melting methods are mainly divided into a cleaning method, a snow melting agent method, a road heating method and the like. The road heating method mainly comprises a conductive concrete heating method, a metal wire heating method, a carbon fiber reinforced concrete heating method and the like. Taking a typical asphalt concrete road as an example, the heating cable is embedded between the middle surface layer and the upper surface layer in the installation, so that the active melting of ice and snow on the road can be realized, and the performance of the road is improved to a certain extent.
In the road curve, in order to balance the centrifugal force generated when the vehicle runs on the curve, the route is made into a one-way cross slope with high outward bending and low inward bending during design so as to eliminate the centrifugal force generated when the vehicle runs, and the design is called as a flat curve ultrahigh design. The road widening is to meet the requirement that the tracks of the rear wheels of the vehicle are deviated to the inner side in a turning road section, and the road width on the inner side of the road is correspondingly increased. In the laying process of the heating cable, a mounting groove needs to be formed at the laying position, and the heating cable is buried in the groove. In the prior art, the grooving on the road is generally operated by manually holding a grooving device, and the grooving machine has the advantages of flexible and convenient use, but has obvious defects: the method can not adapt to the requirement of ultrahigh widening of the road, and can not accurately control the arrangement distance of the heating cables, thereby influencing the paving and working effects of the heating cables and reducing the ice and snow melting efficiency of the heating cables.
Disclosure of Invention
The invention aims to solve the problem that the prior art cannot adapt to ultrahigh widening of a road, and provides a design method of a flexible heating cable grooving vehicle for melting ice and snow at a turning section of the road, which realizes the requirement that the grooving vehicle adapts to ultrahigh widening of the road, and can be used for grooving a plurality of grooves in one stroke, ensuring the precision of the groove pitch and improving the construction efficiency.
The invention discloses a design method of a flexible heating cable grooving vehicle for melting ice and snow at a road turning section, which specifically comprises the following implementation steps:
s1: calibrating road parameters and vehicle parameters;
s2: calculating a road widening value and a cross section ultrahigh transverse gradient;
s3: calculating the distance between the grooves required by the ice and snow melting heating cable;
s4: calculating the rotation angle required by the saw blade adapting to the road ultrahigh value;
s5: the number of blades required to be increased to accommodate road widening is calculated.
Further, in the step of calibrating the road parameter and the vehicle parameter in S1, the calibration method includes: by researching relevant documents and standards of roads and vehicles, key parameters of the roads and the vehicles are determined, wherein the key parameters comprise a road widening value b, a distance A between a vehicle axle base and a front overhang, a radius R of a circular driving curve,running speed V at turning of vehicle, super high transverse gradient i h Width of road shoulder b J Shoulder cross slope i J Maximum superelevation value h of upper outer edge of circular curve of traveling crane c Distance x from a certain point in the superelevation transition section to the starting point, length L of the superelevation transition section c And the raised value h of the outer edge of the roadbed at the x distance cx And the value h 'is reduced at the inner edge of the roadbed at the distance x' cx And a road width B.
Further, the step S2 of calculating the road widening value and the cross-section ultrahigh transverse gradient includes the specific steps of:
s2.1: calculating a driving circular curve widening value b, wherein the calculation formula of the road widening value b on the driving circular curve is as follows:
Figure BDA0003710606110000021
a is the distance between the wheel base of the vehicle and the front suspension, R is the radius of a circular curve of the vehicle, and V is the driving speed of the vehicle during turning;
s2.2: calculating the road width b at the x distance of the ultrahigh transition end x Road width b at distance x x The calculation formula is as follows:
Figure BDA0003710606110000031
x is the distance from a certain point in the ultrahigh transition section to the starting point, L c The length of the ultrahigh transition section is b, and b is a road widening value b on a circular curve of the traveling crane;
s2.3: calculating the raised value h of the outer edge of the roadbed at the x distance cx And the raised value h of the outer edge of the roadbed at the x distance cx The calculation formula is as follows:
Figure BDA0003710606110000032
b J is the width of the shoulder, i J Is the cross slope of road shoulder, x is the distance from a certain point in the ultrahigh transition section to the starting point, L c Is the length of the ultrahigh transition section, B is the road width, i h The transverse slope is ultrahigh;
s2.4: calculating a roadbed inner edge reduction value h 'at the x distance' cx And the value h 'is reduced at the inner edge of the roadbed at the distance x' cx The calculation formula is as follows:
Figure BDA0003710606110000033
wherein b is J Is the width of the shoulder, i J Is the cross slope of road shoulder, x is the distance from a certain point in the ultrahigh transition section to the starting point, L c Length of super-high transition section, b x For road widening value at x distance, i h Is an ultrahigh transverse gradient.
Further, in the step S3 of calculating the distance between the grooves required by the ice and snow melting heating cable, the calculation formula of the distance d between the grooves is as follows:
Figure BDA0003710606110000034
W l for linear power of heating cable, H s Per square meter of heating power.
Further, in the step S4, in the calculation of the rotation angle required by the saw blade adapted to the road ultrahigh value, the calculation formula of the rotation angle i of the saw blade is as follows:
Figure BDA0003710606110000035
h cx is a raised value, h 'at the outer edge of the roadbed at the distance x' cx Is the reduction value of the inner edge of the roadbed at the distance x, b J Is the shoulder width and B is the road width.
Further, in the step S5, the calculation formula of the increased number of the saw blades n at the distance x in the increased number of the saw blades required for adapting to the road widening is:
Figure BDA0003710606110000036
b x the widening value of the road at the distance x is shown, and the distance d is the distance between the grooves of the heating cables.
Furthermore, the band saw blade of the ice and snow melting flexible heating cable grooving vehicle is arranged in the rear area of the vehicle wheel of the grooving vehicle, and the grooving area only comprises a vehicle running wheel track band.
The invention has the following beneficial effects:
the invention provides a design method of a flexible heating cable grooving vehicle for melting ice and snow on a turning section of a road, aiming at the problems that a traditional grooving machine can only carve one groove in one stroke in the construction process of a heating cable snow melting road, the efficiency is low, the traditional grooving machine cannot adapt to ultrahigh and widened road sections of the road and the like.
The invention can calculate the rotation angle required by the ice and snow melting flexible heating cable grooving vehicle to adapt to the road with ultrahigh height, keeps the left and right consistent depth in the heating cable groove, avoids the problem that partial roads melt snow and partial roads cannot melt snow due to inconsistent snow melting effect distribution when the heating cable melts ice and snow, and lays a solid foundation for the large-scale application of the heating cable snow melting road.
The method can calculate the widening of the ice and snow melting flexible heating cable grooving vehicle adapting to the road turning, and the quantity of saw blades of the grooving vehicle is increased, so that the full-area grooving of the road turning is realized, and the ice and snow melting effect of the road turning is further improved.
The method disclosed by the invention is simple and convenient, the obtained result makes up the blank of the prior art in the field, and the grooving vehicle can be designed according to the ultrahigh widening values of different road sections.
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FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic view of the road widening of the present invention;
FIG. 3 is a schematic view of the road superelevation of the present invention;
Detailed Description
The following embodiments are described in detail with reference to the accompanying drawings, so that the implementation process of the present invention for solving the technical problems and achieving the technical effects by applying technical means can be fully understood and implemented.
Fig. 1 shows a flow chart of a design method of a flexible heating cable grooving vehicle for melting ice and snow on a road turning section according to an embodiment of the disclosure.
Examples 1 to 4
As shown in fig. 1-3, the method specifically comprises the following implementation steps:
s1: calibrating road parameters and vehicle parameters;
according to the limit of the external dimensions, axle loads and mass of automobiles, trailers and automobile trains (GB 1589-.
TABLE 1 radius R of the four driving circle curves, and the driving speed V when the vehicle turns.
Examples Wheelbase with front overhang (m) Radius of circular curve for vehicle (m) Running speed (km/h)
1 0.8+3.8 200-250 40
2 0.8+3.8 150-200 40
3 0.8+3.8 100-150 40
4 0.8+3.8 50-100 40
The radius of the circular curve of the traveling crane is an interval value, and the interval lower value is taken for ensuring that the vehicle can smoothly pass through a turning.
According to Standard road engineering (JTG B01-2014), taking a second-level road as an example, the super-high transverse gradient i h 6% shoulder width b J 1.5m, shoulder transverse gradient i J 3%, the maximum superelevation value h of the upper outer edge of the circular curve of the traveling crane c 0.675m, ultrahigh transition section length L c The road width B is 81m and 3.75m, and the parameters x is 20m and x is 50m, respectively.
S2: calculating a road widening value and a cross section ultrahigh transverse gradient;
s2.1: calculating a driving circular curve widening value b, wherein the calculation formula of the road widening value b on the driving circular curve is as follows:
Figure BDA0003710606110000051
a is the distance between the wheel base of the vehicle and the front suspension, R is the radius of a circular curve of the vehicle, and V is the driving speed of the vehicle during turning;
s2.2: calculating the road widening value b at the x distance of the ultrahigh transition end x Road width b at distance x x The calculation formula is as follows:
Figure BDA0003710606110000061
x is the distance from a certain point in the ultrahigh transition section to the starting point, L c The length of the ultrahigh transition section is b, and b is a road widening value b on a circular driving curve;
s2.3: calculating the raised value h of the outer edge of the roadbed at the x distance cx And the raised value h of the outer edge of the roadbed at the x distance cx The calculation formula is as follows:
Figure BDA0003710606110000062
b J is the width of the shoulder, i J Is the cross slope of road shoulder, x is the distance from a certain point in the ultrahigh transition section to the starting point, L c Is the length of the ultrahigh transition section, B is the road width, i h The transverse gradient is ultrahigh;
s2.4: calculating a reduced value h 'of the inner edge of the roadbed at the x distance' cx And the value h 'is reduced at the inner edge of the roadbed at the distance x' cx The calculation formula is as follows:
Figure BDA0003710606110000063
wherein b is J Is the width of the shoulder, i J Is the cross slope of road shoulder, x is the distance from a certain point in the ultrahigh transition section to the starting point, L c Length of super-high transition section, b x For road widening value at x distance, i h Is an ultrahigh transverse gradient.
S3: calculating the distance between the grooves required by the ice and snow melting heating cable; the groove spacing d is calculated by the formula:
Figure BDA0003710606110000064
W l for linear power of heating cable, H s Heating power per square meter;
the linear power W of the heating cable l At 25-35w/m, heating power H per square meter s Table 2 may be referred to for recommended heating power per unit area in typical areas of the country (Ar is 1, and Ar is a road snow-free rate, i.e., a ratio of an area covered by a snow-free layer on a surface to a total area of a road).
Table 2 recommended power for heating per unit area in typical areas of the country (Ar ═ 1)
Figure BDA0003710606110000065
Figure BDA0003710606110000071
Take Anhui district as an example, recommended power H for heating in unit area s Is 350-550W/m 2 。
S4: calculating the rotation angle required by the saw blade adapting to the road ultrahigh value;
the calculation formula of the saw blade rotation angle i is as follows:
Figure BDA0003710606110000072
h cx is a raised value, h 'at the outer edge of the roadbed at the distance x' cx Is the reduction value of the inner edge of the roadbed at the distance x, b J The width of the road shoulder is the width of the road shoulder,and B is the road width.
S5: the number of the saw blades required to be increased for adapting to the road widening is calculated, and the calculation formula of the number n of the saw blades at the distance x is as follows:
Figure BDA0003710606110000073
b x the distance x is the road widening value, and d is the groove distance of the heating cable.
The calculated values of the above parameters in examples 1 to 4 are shown in Table 3.
Table 3 the required groove spacing d of the heating cable, the required rotation angle i of the saw blade, and the required number n of saw blades at the distance x.
Figure BDA0003710606110000074
Figure BDA0003710606110000081
In examples 1-4, the distance x should be increased by the number n of saw blades to be an integer within the data range in Table 3.
In embodiments 1-4, it can be seen that the blade needs to be rotated by a corresponding angle at different x positions, and the distance L between the angle and the x position c The distance of the relative positions is proportional, the closer x is to L c The larger the rotation angle; at the same time, the increased number of saw blades is also separated from the position of x by L c The distance of the relative positions is in direct proportion, and the increased saw blade number can realize the interval of the notches within the calculated range to meet the ice and snow melting requirement.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims (6)

1. A design method of a flexible heating cable grooving vehicle for melting ice and snow at a road turning section is characterized by comprising the following steps: the method comprises the following steps:
s1: calibrating road parameters and vehicle parameters;
s2: calculating a road widening value and a cross section ultrahigh transverse gradient;
s3: calculating the distance between the grooves required by the ice and snow melting heating cable;
s4: calculating the rotation angle required by the saw blade adapting to the road ultrahigh value;
s5: the number of saw blades required to accommodate road widening is calculated.
2. The design method of the flexible heating cable grooving vehicle for melting ice and snow at the road turning section according to claim 1, wherein in the step of calibrating the road parameters and the vehicle parameters at S1, the calibration method comprises the following steps: by researching relevant documents and standards of roads and vehicles, key parameters of the roads and the vehicles are determined, wherein the key parameters comprise a road widening value b, a distance A of a vehicle wheelbase plus a front overhang, a radius R of a driving circle curve, a driving speed V when the vehicles turn, and an ultrahigh transverse gradient i h Width of road shoulder b J Shoulder cross slope i J Maximum superelevation value h of upper outer edge of circular curve of traveling crane c Distance x from a certain point in the superelevation transition section to the starting point, length L of the superelevation transition section c And the raised value h of the outer edge of the roadbed at the x distance cx And the value h 'is reduced at the inner edge of the roadbed at the distance x' cx And a road width B.
3. The design method of the flexible heating cable grooving vehicle for melting ice and snow at the road turning section according to claim 2, wherein the step S2 of calculating the road widening value and the cross section ultrahigh transverse gradient comprises the following specific steps:
s2.1: calculating a driving circular curve widening value b, wherein the calculation formula of the road widening value b on the driving circular curve is as follows:
Figure FDA0003710606100000011
a is the distance between the wheel base of the vehicle and the front suspension, R is the radius of a circular curve of the vehicle, and V is the driving speed of the vehicle during turning;
s2.2: calculating road sum at x distance of ultrahigh transition endWide value b x Road width b at distance x x The calculation formula is as follows:
Figure FDA0003710606100000021
x is the distance from a certain point in the ultrahigh transition section to the starting point, L c The length of the ultrahigh transition section is b, and b is a road widening value b on a circular curve of the traveling crane;
s2.3: calculating the raised value h of the outer edge of the roadbed at the x distance cx And the raised value h of the outer edge of the roadbed at the x distance cx The calculation formula is as follows:
Figure FDA0003710606100000022
b J is the width of the shoulder, i J Is the cross slope of road shoulder, x is the distance from a certain point in the ultrahigh transition section to the starting point, L c Is the length of the ultrahigh transition section, B is the road width, i h The transverse gradient is ultrahigh;
s2.4: calculating a roadbed inner edge reduction value h 'at the x distance' cx And x is a reduced value h 'of the inner edge of the roadbed at the distance' cx The calculation formula is as follows:
Figure FDA0003710606100000023
wherein b is J Is the width of the shoulder, i J Is the cross slope of road shoulder, x is the distance from a certain point in the ultrahigh transition section to the starting point, L c Length of super-high transition section, b x For road widening value at x distance, i h Is an ultrahigh transverse gradient.
4. The design method of the flexible heating cable grooving vehicle for melting ice and snow at the road turning section according to claim 3, wherein in the step of calculating the groove spacing required by the melting ice and snow heating cable by the step S3, the calculation formula of the groove spacing d of the heating cable is as follows:
Figure FDA0003710606100000024
W l for linear power of heating cable, H s Per square meter of heating power.
5. Root of herbaceous plantThe design method of the flexible heating cable grooving vehicle for melting ice and snow at the road turning section as claimed in claim 4, wherein in the step S4 of calculating the rotation angle required by the saw blade adapted to the road ultrahigh value, the calculation formula of the rotation angle i of the saw blade is as follows:
Figure FDA0003710606100000025
h cx is a raised value, h 'at the outer edge of the roadbed at the distance x' cx Is the decrease value of the inner edge of the roadbed at the x distance, b J Is the shoulder width and B is the road width.
6. The design method of the flexible heating cable grooving vehicle for melting ice and snow at the road turning section as claimed in claim 5, wherein in the step S5 of calculating the number of the blades to be increased for adapting to road widening, the calculation formula of the number n of the blades to be increased at the distance x is as follows:
Figure FDA0003710606100000026
b x the widening value of the road at the distance x is shown, and the distance d is the distance between the grooves of the heating cables.
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