Method for calculating engineering quantity of additionally paving functional layer on road surface by considering tectonic depth

Abstract

The invention discloses a method for calculating the engineering quantity of additionally paving a functional layer on a road surface by considering the tectonic depth. The method comprises the following steps: taking each road section corresponding to each lane as a unit for calculating the engineering amount of additionally paving the functional layer; detection point position determination and field marking are carried out on each unit road surface; measuring the structural depth of each marked detection point, and calculating the average structural depth of each unit; determining the material type and required thickness of a functional layer additionally paved on each unit road surface, and counting the actual area of each functional layer additionally paved on each unit road surface; and respectively calculating the design area of the pavement of each functional layer additionally paved on each unit, and summing to obtain the design area of the pavement of the functional layer additionally paved on each lane as the engineering quantity of the pavement of the functional layer additionally paved on each lane. The method is used for calculating the engineering quantity of the pavement additional paving functional layer material under the conditions of pitted surfaces, looseness, aggregate stripping and the like on the surface, and the engineering quantity of the pavement additional paving functional layer material can be accurately calculated in the design stage.

Description

Technical Field

[0001] The present invention relates to the technical field of road engineering, and specifically refers to a calculation method for the engineering quantity of a pavement overlay functional layer considering the texture depth. Background Art

[0002] The maintenance of asphalt pavements has received increasing attention and has become one of the important contents of highway and urban road construction in China. Due to the direct bearing of traffic loads and natural environments on the surface layer of asphalt pavements, combined with reasons such as material and construction process control, after long-term use, diseases such as pitted surface and looseness will occur due to aggregate spalling, asphalt aging, and adhesion decline, resulting in a large number of fine potholes, which affect the durability and driving comfort of the pavement.

[0003] Currently, there are roughly five preventive maintenance schemes for asphalt pavements, namely fog seal, thin overlay, chip seal, slurry seal, and microsurfacing. Fog seal is a preventive maintenance measure that uses a special fog seal spraying vehicle to spray modified emulsified asphalt or other pavement protectants on the existing asphalt pavement. The thickness of the thin overlay is usually between 1 and 3 cm, the thickness of the chip seal is usually between 0.5 and 2.5 cm, and the thickness of the slurry seal and microsurfacing is usually between 1 and 1.5 cm. In addition, when some roads are maintained, considering the role of safety warning, it is required to use ultra-thin colored anti-skid wearing courses, etc. (the thickness is in the mm level). For example, for urban roads, urban landscapes, traffic management, etc., it is required to overlay colored anti-skid wearing courses or plastic runway structural layers (generally 8 - 13 mm thick) on motor vehicle lanes, non-motor vehicle lanes, or sidewalks (asphalt surface layer).

[0004] When overlaying preventive maintenance measures such as thin overlays and microsurfacing or colored anti-skid wearing courses on pavements with a large number of fine potholes caused by the above-mentioned pitted surface, looseness, and aggregate spalling, the overlay materials will be embedded into the fine potholes under the action of construction machinery and their own gravity, etc.

[0005] In the prior art, for overlaying the above-mentioned functional layers such as thin overlays, microsurfacing, or colored anti-skid wearing courses on conventional pavements, the engineering quantity is often calculated according to the actual overlay area in the design stage, without considering the engineering quantity of the materials embedded in the potholes, resulting in problems such as inaccurate calculation of the engineering quantity, large deviation in material procurement during the construction stage, and great disputes in the review of the engineering quantity during the settlement stage, which is not conducive to construction preparation and later project measurement and settlement. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention proposes a calculation method for the engineering quantity of the pavement overlay functional layer considering the texture depth, which is used for calculating the engineering quantity of the pavement overlay functional layer materials in the case of diseases such as pitted surface, looseness, and aggregate spalling on the surface, and can accurately calculate the engineering quantity of the pavement overlay functional layer materials in the design stage, facilitating the control of investment, the procurement of materials during the construction period, and the construction preparation, and providing a basis for the engineering measurement and settlement.

[0007] To achieve the above object, a calculation method for the engineering quantity of the pavement overlay functional layer considering the texture depth designed by the present invention is characterized in that it includes the following steps:

[0008] S1) Divide and mark the road to be overlaid with the functional layer along the transverse lane directions and the longitudinal section directions respectively, and take each section corresponding to each lane as a unit for calculating the engineering quantity of the overlaid functional layer;

[0009] S2) Determine and mark the detection points on the pavement of each unit respectively;

[0010] S3) Measure the texture depth of each detection point marked in step S2), and calculate the average texture depth of the pavement of each unit;

[0011] S4) Determine the material type and required thickness of the pavement overlay functional layer of each unit, and count the actual area of each functional layer overlaid on the pavement of each unit;

[0012] S5) Calculate the designed area of the pavement of each unit overlaid with each functional layer respectively, and sum up the designed areas of the pavement of the overlaid functional layer of each section corresponding to each lane to obtain the designed area of the pavement of the overlaid functional layer of each lane, which is used as the engineering quantity of the pavement overlay functional layer of each lane;

[0013] The designed area of the pavement of each unit overlaid with each functional layer is calculated by the following formula

[0014]

[0015] In the formula,

[0016] S represents the designed area of the pavement of each unit overlaid with the functional layer,

[0017] V represents the total calculated volume of the materials of the pavement overlay functional layer of each unit,

[0018] H represents the required thickness of the pavement of each unit overlaid with the functional layer,

[0019] represents the average texture depth of each unit,

[0020] S0 represents the actual area of the pavement of each unit overlaid with the functional layer.

[0021] Further, in S1), the transverse direction of the road includes a motor vehicle lane, a non-motor vehicle lane, and a sidewalk.

[0022] Furthermore, in S1), the longitudinal direction of the road is divided into several sections according to 200m - 500m. When the last section is less than half of the section length, it should be incorporated into the nth section; when the last section exceeds half of the section length, it should be incorporated into the (n + 1)th section for separate detection and calculation.

[0023] Furthermore, in S2), for the motor vehicle lane, a plurality of detection points are randomly selected and marked respectively on the left wheel track belt, the center line of the motor vehicle lane, and the right wheel track belt of the motor vehicle lane at each section, avoiding the cracks.

[0024] Furthermore, in S2), for the motor vehicle lane, three detection points are randomly selected respectively on the left wheel track belt, the center line of the motor vehicle lane, and the right wheel track belt of the motor vehicle lane, and the distance between adjacent detection points is 20 - 50m.

[0025] Further, in S3), the texture depth of each detection point is measured by the manual sand paving method or the electric sand paving method.

[0026] Furthermore, in S3), the average texture depth of each unit is accurate to 0.01mm.

[0027] Further, in S5), the designed area of the pavement with the overlay functional layer for each lane is obtained by the following formula

[0028] S 总 =∑S 各路段

[0029] In the formula,

[0030] S 总 represents the designed area of the pavement with the overlay functional layer for each lane,

[0031] S 各路段 represents the designed area of the pavement with the overlay functional layer for each section corresponding to each lane.

[0032] The advantages of the present invention are as follows:

[0033] 1. The present invention is applicable to the calculation of the engineering quantity of the overlay functional layer material for the pavement with diseases such as pitted surface, looseness, and aggregate spalling. First, according to the surface texture detection of each lane of the pavement, the average texture depth of each unit is calculated. During the detection, the surface texture differences between the wheel track belt and non-wheel track belt after the pavement is in service, and between the non-motor vehicle lane and the sidewalk (using the asphalt surface layer) are fully considered, realizing refined data acquisition, providing a basic basis for the calculation of the engineering quantity of the overlay functional layer material for the pavement, and being beneficial to ensuring the accuracy of the engineering quantity calculation;

[0034] 2. The present invention creatively provides the calculation steps and formulas for the engineering quantity of the pavement overlay functional layer material, which are simple and practical, and effectively solve the problem of low accuracy in calculating the engineering quantity of the pavement overlay functional layer material;

[0035] 3. The calculation method of the present invention has the characteristics of being easy to implement, simple and precise, and high precision, and can guide the design and construction preparation of the pavement overlay functional layer;

[0036] The calculation method for the engineering quantity of the pavement overlay functional layer considering the texture depth is used to calculate the engineering quantity of the pavement overlay functional layer material in the case of diseases such as pitted surface, looseness, and aggregate spalling on the surface. It can accurately calculate the engineering quantity of the pavement overlay functional layer material in the design stage, facilitate the control of investment, material procurement during the construction period, and construction preparation, and provide a basis for project measurement and settlement. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is the flow chart of the present invention;

[0038] Figure 2 is the schematic plan view of the texture depth detection of a single unit in the embodiment of the present invention;

[0039] Figure 3 is Figure 1 the schematic diagram of the detection points of the motor vehicle lane in

[0040] Figure 4 is Figure 1 the schematic diagram of the detection points of the non-motor vehicle lane in

[0041] Figure 5 is Figure 1 the schematic diagram of the detection points of the sidewalk in

[0042] Figure 6 is the schematic diagram of the pit filling structure of the pavement overlay functional layer material;

[0043] In the figure: motor vehicle lane 1, non-motor vehicle lane 2, sidewalk 3, median strip or other facility strip 4, functional layer material filled into the pit 5, designed functional layer overlay material 6;

[0044] Left wheel track line 11 of the motor vehicle lane, center line 12 of the motor vehicle lane, right wheel track line 13 of the motor vehicle lane;

[0045] Center line 21 of the non-motor vehicle lane;

[0046] Center line 31 of the sidewalk. DETAILED DESCRIPTION OF THE INVENTION

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0049] As Figure 1 shown, a calculation method for the engineering quantity of a pavement overlay functional layer considering the construction depth in the present invention includes the following steps:

[0050] S1) Divide and mark the road to be overlaid with the functional layer along the transverse lane directions and longitudinal road section directions respectively, and take each road section corresponding to each lane as a unit for calculating the engineering quantity of the overlaid functional layer.

[0051] Specifically, the transverse direction of the road includes a motor vehicle lane 1, a non-motor vehicle lane 2, and a sidewalk 3.

[0052] Specifically, the longitudinal direction of the road is divided into several sections according to 200 m to 500 m. When the last section is less than half of the section length, it should be included in the nth section; when the last section exceeds half of the section length, it should be included in the (n + 1)th section for separate detection and calculation.

[0053] In this embodiment, a design example of overlaying a functional layer on an urban secondary arterial road with a length of 2350 m (the standard cross-section is 29 m = 3 m sidewalk + 2 m non-motor vehicle lane + 2 m median strip + 0.25 m curb + 3.5 m motor vehicle lane + 3.5 m motor vehicle lane + 0.5 m double yellow line + 3.5 m motor vehicle lane + 3.5 m motor vehicle lane + 0.25 m curb + 2 m median strip + 2 m non-motor vehicle lane + 3 m sidewalk) is taken.

[0054] The motor vehicle lane 1 is sequentially marked as J 1A , J 1B , J 1C , J 1D from left to right; the non-motor vehicle lane 2 is sequentially marked as FJ 2A , FJ 2B from left to right; the sidewalk 3 (using an asphalt surface layer) is sequentially marked as R 3A , R 3B from left to right.

[0055] It is known that the total length of the road is 2350 m. The road to be detected is divided into 5 sections according to 500 m. Among them, the last section exceeds half of 500 m, and the last section (the 5th section is 350 m long) should be detected separately. Then each road section of each motor vehicle lane is marked as J1A-1 , J 1A-2 , J 1A-3 , J 1A-4 , J 1A-5 , J 1B-1 , J 1B-2 , J 1B-3 , J 1B-4 , J 1B-5 , ……J 1D-1 , J 1D-2 , J 1D-3 , J 1D-4 , J 1D-5 ; Each non-motor vehicle lane per section is marked as FJ 2A-1 , FJ 2A-2 , FJ 2A-3 , FJ 2A-4 , FJ 2A-5 , FJ 2B-1 , FJ 2B-2 , FJ 2B-3 , FJ 2B-4 , FJ 2B-5 ; Each sidewalk per section is marked as R 3A-1 , R 3A-2 , R 3A-3 , R 3A-4 , R 3A-5 , R 3B-1 , R 3B-2 , R 3B-3 , R 3B-4 , R 3B-5 .

[0056] S2) Determine and on-site mark the detection points on each unit road surface respectively.

[0057] Specifically, for the motor vehicle lane, randomly select multiple detection points on each section, avoiding the left wheel track 11 of the motor vehicle lane at the crack, the center line 12 of the motor vehicle lane, and the right wheel track 13 of the motor vehicle lane, and mark them; for the non-motor vehicle lane, randomly select multiple detection points on the center line 21 of the non-motor vehicle lane on each section, and mark them; for the sidewalk (with an asphalt surface layer), randomly select multiple detection points on the center line 31 of the sidewalk on each section, and mark them.

[0058] Specifically, for the motor vehicle lane, three detection points are randomly selected on the left wheel track belt, the lane center line, and the right wheel track belt respectively, and the distance L0 between adjacent detection points is 20 - 50 m; for the motor vehicle lane, three detection points are randomly selected on the non-motor vehicle lane center line 21 respectively, and the distance L0 between adjacent detection points is 20 - 50 m; for the sidewalk (with an asphalt surface layer), three detection points are randomly selected on the sidewalk center line 31 respectively, and the distance L0 between adjacent detection points is 20 - 50 m, as Figure 2 shown.

[0059] As Figures 3 to 5 shown, for the motor vehicle lane, Z1, Z2, and Z3 are three detection points located on the left wheel track belt 11 of the motor vehicle lane, X1, X2, and X3 are three detection points located on the lane center line 12 of the motor vehicle lane, and Y1, Y2, and Y3 are three detection points located on the right wheel track belt 13 of the motor vehicle lane; for the non-motor vehicle lane, F1, F2, and F3 are three detection points on the non-motor vehicle lane center line 21; for the sidewalk, R1, R2, and R3 are three detection points on the sidewalk center line 31.

[0060] In this embodiment, the distance L0 between adjacent detection points is 50 m.

[0061] S3) Measure the texture depth of each detection point marked in step S2), and calculate the average texture depth of each unit pavement.

[0062] Specifically, the manual sand spreading method or the electric sand spreading method is used to measure the texture depth of each detection point. As Figure 6 shown, it is a schematic diagram of the structure of the pavement pothole filled with the functional layer material for paving.

[0063] Preferably, the average texture depth of each unit is accurate to 0.01 mm.

[0064] In this embodiment, the manual sand spreading method in the "Code for In-situ Testing of Highway Subgrade and Pavement" (JTG 3450 - 2019) is used to measure the texture depth (accurate to 0.01 mm) of each detection point marked in step S2), and the average texture depth of each lane and each section is calculated, as shown in Table 1.

[0065] Table 1 Detection values of the average texture depth of each lane in each section (mm)

[0066]

[0067] S4) Determine the material type and required thickness of the functional layer for paving each unit pavement, and count the actual area of each unit pavement paved with each functional layer.

[0068] According to the functional requirements and technical and economic comparison of motor vehicle lanes, non-motor vehicle lanes, and sidewalks (with asphalt surface layers), formulate a clear pavement overlay functional layer plan, including materials and thickness.

[0069] In this embodiment, the motor vehicle lanes are prophylactically maintained with a 1-cm-thick microsurfacing, and the non-motor vehicle lanes and sidewalks (with asphalt surface layers) are respectively overlaid with blue and red anti-skid wearing courses (3 mm thick).

[0070] In this embodiment, the actual areas of the pavement overlay functional layer are respectively counted for motor vehicle lanes, non-motor vehicle lanes, and sidewalks (with asphalt surface layers). The curb strips are considered together with their adjacent lanes, as shown in Table 2.

[0071] Table 2 Overlay area of each lane in each section (m 2 )

[0072]

[0073]

[0074] S5) Calculate the designed areas of the pavement overlay functional layer for each unit respectively, and sum up the designed areas of the pavement overlay functional layer for each section corresponding to each lane to obtain the designed area of the pavement overlay functional layer for each lane, which is used as the engineering quantity of the pavement overlay functional layer for each lane.

[0075] The designed area of the pavement overlay functional layer for each unit is calculated by the following formula

[0076]

[0077] In the formula,

[0078] S represents the designed area of the pavement overlay functional layer for each unit,

[0079] V represents the total calculated volume of the functional layer materials for each unit,

[0080] H represents the required thickness of the pavement overlay functional layer for each unit,

[0081] represents the average texture depth of each unit,

[0082] S0 represents the actual area of the pavement overlay functional layer for each unit.

[0083] The derivation process of the above formula for the designed area of the pavement overlay functional layer for each unit is as follows.

[0084] First, the volume of the functional layer materials embedded in the pavement surface texture depth is:

[0085]

[0086] Then, obtain the total volume of the overlay functional layer material, that is

[0087]

[0088] Finally, the designed area of the overlay of each functional layer on each unit pavement is derived as

[0089]

[0090] In the formula,

[0091] V0 represents the volume of the functional layer material embedded in the surface texture depth of the pavement,

[0092] represents the average texture depth of each unit,

[0093] S0 represents the actual area of the overlay of the functional layer on each unit pavement.

[0094] V represents the calculated total volume of the functional layer material for each unit overlay,

[0095] V0 represents the volume of the functional layer material embedded in the surface texture depth of the pavement,

[0096] V1 represents the volume of the functional layer material designed according to the actual thickness,

[0097] H represents the required thickness of the overlay of the functional layer on each unit pavement,

[0098] S represents the designed area of the overlay of the functional layer on each unit pavement.

[0099] In this embodiment, according to the above results, calculate the engineering quantities of different functional layers of each unit, convert the material engineering quantities into the designed area with the designed thickness, and the calculation results are shown in Table 3.

[0100] Table 3 Engineering Quantities of Functional Layers for Motor Vehicle Lanes, Non-Motor Vehicle Lanes, and Sidewalks (m 2 )

[0101]

[0102] Specifically, the designed area of the overlay of the functional layer on each lane is obtained through the following formula

[0103] S 总 =∑S 各路段

[0104] In the formula,

[0105] S 总 represents the designed area of the overlay of the functional layer on each lane,

[0106] S 各路段Indicates the designed area of the pavement with overlay functional layers for each section corresponding to each lane.

[0107] In this embodiment, the final micro-surfacing project quantity for motorway maintenance is 45246 m 2 (The actual area of the motorway is 34500 m 2 ); the project quantity of the blue anti-skid wearing course for the non-motorway is 15207 m 2 (The actual area of the non-motorway is 9200 m 2 ); the project quantity of the red anti-skid wearing course for the sidewalk is 22570 m 2 (The actual area of the sidewalk is 13800 m 2 ). It can be seen that the adoption of this method can provide a basis and theoretical support for the calculation of the project quantity of the overlay functional layer materials for the pavement with a large number of fine potholes.

[0108] The calculation method for the project quantity of the pavement overlay functional layer considering the texture depth of the present invention is used for calculating the project quantity of the overlay functional layer materials for the pavement with diseases such as pitted surface, looseness, and aggregate spalling. It can accurately calculate the project quantity of the overlay functional layer materials in the design stage, facilitate the control of investment and the procurement of materials and construction preparation during the construction period, and provide a basis for project measurement and settlement.

[0109] The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A calculation method for the engineering quantity of the pavement overlay functional layer considering the construction depth, characterized in that It includes the following steps: S1) Divide and mark the road to be paved with a functional layer along the transverse lane directions and longitudinal road section directions respectively. Each road section corresponding to each lane is used as a unit for calculating the engineering quantity of the paved functional layer; S2) Determine and mark the detection points on the road surface of each unit respectively; S3) Measure the texture depth of each detection point marked in step S2), and calculate the average texture depth of the road surface of each unit; S4) Specify the material type and required thickness of the functional layer paved on each unit road surface, and count the actual area of each functional layer paved on each unit road surface; S5) Calculate the designed area of the road surface of each functional layer paved on each unit respectively, and sum up the designed areas of the road surface of the functional layer paved on each road section corresponding to each lane to obtain the designed area of the road surface of the functional layer paved on each lane, which is used as the engineering quantity of the functional layer paved on each lane road surface; The designed area of the road surface of each functional layer paved on each unit is calculated by the following formula In the formula, S represents the designed area of the road surface of the functional layer paved on each unit, V represents the total calculated volume of the materials of the functional layer paved on each unit, H represents the required thickness of the road surface of the functional layer paved on each unit, Indicates the average structural depth of each unit, S0 represents the actual area of the functional layer paved on each unit road surface.

2. The calculation method of the engineering quantity of the pavement overlay functional layer considering the construction depth according to claim 1, characterized in that: In S1), the transverse direction of the road includes the motor vehicle lane (1), non-motor vehicle lane (2), and sidewalk (3).

3. The calculation method of the engineering quantity of the pavement overlay functional layer considering the construction depth according to claim 2, characterized in that: In S1), the road is longitudinally divided into several sections according to 200m - 500m. When the last section is less than half of the section length, it should be included in the nth section; when the last section exceeds half of the section length, it should be included in the (n + 1)th section for separate detection and calculation.

4. The calculation method of the engineering quantity of the pavement overlay functional layer considering the construction depth according to claim 3, characterized in that: In S2), for the motor vehicle lane (1), randomly select multiple detection points on the left wheel track belt (11), the center line of the motor vehicle lane (12), and the right wheel track belt (13) of the motor vehicle lane on each road section, avoiding the cracks, and mark them.

5. The calculation method of the engineering quantity of the pavement overlay functional layer considering the construction depth according to claim 4, characterized in that: In S2), for the motor vehicle lane, randomly select three detection points on the left wheel track belt (11), the center line of the motor vehicle lane (12), and the right wheel track belt (13) of the motor vehicle lane respectively, and the distance between adjacent detection points is 20 - 50m.

6. The calculation method of the engineering quantity of the pavement overlay functional layer considering the construction depth according to claim 1, characterized in that: In S3), the manual sand paving method or the electric sand paving method is used to measure the texture depth of each detection point.

7. The calculation method of the engineering quantity of the pavement overlay functional layer considering the construction depth according to claim 6, characterized in that: In S3), the average texture depth of each unit is accurate to 0.01mm.

8. The calculation method for the engineering quantity of the pavement overlay functional layer considering the construction depth according to claim 1, characterized in that: In S5), the designed area of the road surface of the functional layer paved on each lane is obtained by the following formula S 总 = ∑S 各路段 In the formula, S 总 represents the designed area of the pavement with the additional functional layer for each lane. S 各路段 Indicates the designed area of the pavement of the additional functional layer for each section corresponding to each lane.

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