JPS6128601A - Selection of construction kind for maintenance and repairingof road pavement - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention provides a maintenance and repair method selection diagram and a method type selection table when implementing a maintenance and repair method according to the road surface properties based on the results of a road surface survey. This invention relates to a method for selecting the type of maintenance and repair method for road pavement, which selects the type and specification of the type of maintenance and repair method based on the results of a road surface survey.

When road pavement is put into service, the road surface ages or becomes damaged over time due to traffic loads, weather conditions, etc. In particular, the volume of traffic is increasing year by year, the quality of the traffic is becoming heavier, and the speed of transportation is increasing. Become. Rebuilding the pavement after it is destroyed requires a large amount of money and labor, and it also means blocking traffic for the construction.

If proper maintenance and repairs are carried out before road surface conditions deteriorate, the usability of the pavement can be maintained at a high level with little cost and effort, traffic is safe, and the durability of the pavement can be extended. Therefore, it is required that pavement maintenance and repair methods be implemented at an appropriate time. In order to maintain and manage road pavement, we investigate the surface properties of the pavement, evaluate the road surface condition, and carry out maintenance and repairs that are compatible with the traffic and environmental conditions of the area where the road pavement is located, in response to the road surface condition. Depending on the construction method,
It is necessary to carry out maintenance and repair before the timing is too late.

However, in order to pave and maintain and repair routes, the route is divided into sections of appropriate distance, and the road surface is surveyed and the construction method and type of work are determined. Traditionally, this required a great deal of effort and time. Therefore, it has been desired to establish a method that can easily select the type of construction method and the specifications of the type of construction. This was especially true when maintaining and managing pavements in areas with many routes.

In order to establish and implement a pavement maintenance management system, the present inventor has developed a simple and appropriate road surface survey method and equipment, and in accordance with the above-mentioned requests, has developed a maintenance and repair method based on the results of the road surface survey. We realized that it was necessary to establish a method for selecting specifications simply and accurately, and we conducted research and completed research while conducting road surface surveys on many routes in many regions.

The method for selecting the work type and work type specifications for the maintenance and repair method of the present invention is based on the method selection diagram for the road pavement maintenance and repair method, and the method is classified based on the environmental conditions such as large vehicle traffic volume, residential environment, route environment, etc. Using a construction method selection table for maintenance and repair methods that includes a detailed list of construction types and construction specifications that have been designed in advance, the road surface survey results of the measurement route are plotted on the construction method selection chart to select a construction method, and then select the construction method according to the construction method. The present invention relates to a method for selecting the type of maintenance and repair method for road pavement, which is characterized by selecting the type and specifications of the type of maintenance and repair method based on a selection table.

As a construction method selection diagram for maintenance and repair methods, a graph is created with the vertical and horizontal axes representing the cracking rate and the average rutting depth in the transverse direction, created for each specific range of the standard deviation of unevenness in the vertical direction and the amount of heavy vehicle traffic. Draw a contour curve of the serviceability index on the map, and fill in the areas such as surface treatment method, overlay method, layer overlay method, replacement method, etc., and create a construction method selection map. A contour curve of the cracking rate is drawn on a graph in which the vertical and horizontal axes are the standard deviation of the unevenness in the longitudinal direction and the average of the rut depth created for each specific range, and the surface treatment method, overlay method, Use the construction method selection map with areas such as bed layer overlay construction method, piling construction method, etc. filled in, and use it as a construction method selection chart for maintenance and repair methods. In response to heavy vehicle traffic,
Use a work selection table consisting of a detailed list of work types and work specifications that have been designed in advance according to environmental conditions such as residential environments such as urban areas and non-urban areas, route environments such as flood-resistant areas, steep slope areas, general areas, etc. It is something.

A system diagram showing an example of the method for selecting types of maintenance and repair work according to the present invention is shown in FIG. Measurement sections are set at predetermined distance intervals on the measurement route, and the results of the road surface survey obtained for each measurement section are plotted on the construction method selection map, and the surface treatment method,
Decide which construction method is appropriate: overlay construction method, bed layer overlay construction method, or replacement construction method. Next, the type of construction method that has been decided upon is determined using a construction type selection table that was created taking into account traffic volume and residential environment. Furthermore, the specifications of the work type are determined based on the work type specification table, which is created taking into account the route environment.

Figures 2 and 3 show an example of a construction method selection diagram.

Figure 2 is a construction method selection map created for each specific range of large vehicle traffic volume (7 days per vehicle, one direction) and the standard deviation of unevenness in the longitudinal direction. Diagram for selecting a construction method based on the average (hereinafter referred to as construction method selection diagram A)
It is.

In the figure, 11 is the construction method selection diagram A, and 12 is the cracking rate (C
), the axis of 13 average CI of rut depth,
14 is a contour curve of serviceability index (PSI). 15 is an area of the replacement method, 16 is an area of the lining/overlay method, 17 is an area of the overlay method, and 18 is an area of the surface treatment method.

Figure 3 is a construction method selection map created for each specific range of large vehicle traffic volume and serviceability index, and the construction method is selected based on the crack rate, the standard deviation of unevenness in the longitudinal direction, and the average rut depth ( (hereinafter referred to as construction method selection diagram B).

In the figure, 21 is the construction method selection diagram B122 is the X-axis of the standard deviation (σ) of unevenness in the longitudinal direction, O is the y-axis of the average depth of the rut, and 24 is the contour curve of the cracking rate (q). 5 is the area of the replacement method, 26 is the area of the bed layer/overlay method, 27 is the area of the overlay method, and 28 is the area of the overlay method.
is in the area of surface treatment methods.

Construction method selection drawings A and B are drawn based on the maintenance and repair guidelines (published by the Japan Road Association), based on research results from various fields, and experience related to maintenance and repair. and the relationship between the corresponding construction method, the relationship between the traffic volume of large vehicles, the crack rate, and the response method, and the formula for calculating the serviceability index % formula % where PSI: Serviceability index σ: Standard deviation of unevenness in the longitudinal direction (mi) C: Crack rate (X) D: average rut depth (crn) etc. are used to synthesize and draw.

As the construction method selection diagram, either construction method selection diagram A or construction method selection diagram B may be used.

For example, when selecting a construction method using construction method selection map A, select construction method selection map A that matches the large vehicle traffic volume in the measured section of the route and the standard deviation range of unevenness in the longitudinal direction. Then,
Plot the average value of crack rate and rut depth,
The area of the construction method to which the point belongs may be selected as the construction method.

Table 1 is a detailed list of work types, Table 2 is a detailed list of work type specifications, and Tables 1 and 2 constitute a work type selection table for maintenance and repair methods.

In Table 1, the construction methods are listed in the vertical column (vertical axis), and the construction methods for surface treatment, overlay, lining overlay, and replacement are listed in order from the top, and the horizontal column (horizontal axis) is the road environment, which includes heavy vehicle traffic. Depending on the amount (N) (machine 7 days, one direction), N≧3000
(more than 3000 units), 3000>N≧1000 (3
(Less than 000 units, 1000 units or more), 1000>N≧500
(Less than 1000 units, 500 units or more), 500 > N≧
250 (less than 500 units, 250 units or more), 250) N(
(less than 250 vehicles), and simple pavement (areas where the total vertical traffic volume of large vehicles is less than 100 vehicles/day), and categorize them into urban areas (including urban areas, residential areas, residential areas, etc.),
It is divided into areas outside the city area (areas outside the city area). and,
The details of the type of work are entered in this table. Table 1 can be read as follows. If you look horizontally in the surface treatment column, N
≧3000. If 3000>N≧1000, surface treatment is not targeted. 1000>N≧500, the thickness is 2. Apply Otyn (thin layer) (mixture surface treatment - mixed surface treatment genus 2Crn). 500〉N≧250, mixed surface treatment with a thickness of 2 cm in urban areas, three-layer finish of No. 5, No. 6, and No. 7 outside the city area (sprayed surface treatment with No. 5 crushed stone, No. 6 crushed stone, and No. 7 crushed stone as aggregate) A three-layer finish using crushed stone).

250 > N, urban areas are treated with mixed surface treatment genus 2 c
m.

Outside the city area, a three-layer finishing spray-type surface treatment using No. 5 crushed stone, No. 6 crushed stone, and No. 7 crushed stone will be applied. For simple pavement, this means a mixed surface treatment with a thickness of 2α in urban areas, and a two-layer finishing spray type surface treatment using No. 6 crushed stone and No. 7 crushed stone outside the city. In the overlay method, 8.0.6.0.5.0.4-. Numbers such as 0 are written, but these indicate that the overlay with heated asphalt mixture is 8Crn thick, 6α thick, and 6α thick, respectively.
This means that the construction will be 5Crn thick and 4m thick.

In the bed layer overlay construction method, an overlay of heated asphalt mixture with a thickness of 10z is constructed both in urban areas and outside urban areas where N≧3000. Since the traffic volume is heavy and there is no bed layer, the thickness is increased by the amount of bed layer. 3000>N≧
At 1000, the urban area has a 10m thick overlay. Outside the city area, it is No. 5, No. 6, No. 7 + 80, and this is a three-layer finishing spray type surface treatment of No. 5, No. 6, and No. 7 crushed stone as a bed layer, and a 8. This means applying an overlay of Ocrn's forced hot asphalt mixture. The same applies below. What is replacement in the replacement construction method?
This means replacement with new material. On-road recycling refers to a construction method in which conventional pavement is reprocessed on the road and used as a roadbed.

The construction method determined in Figure 1 and the type of construction can be selected from Table 1 based on the road environment such as traffic volume, urban area, and outside urban area.

Table 2 shows the construction method in the vertical column (vertical axis), followed by surface treatment and binder in the case of cuttings, overlay binder and construction thickness in the case of cuttings overlay, and then in the case of replacement. The subbase layer and surface base layer are listed. In the horizontal column (horizontal axis), flow-resistant areas, dangerous slope areas, and general areas are listed in order, and details of the specifications of the type of work are entered in the table. In flood-resistant areas, large vehicle traffic volume is 1
This applies to routes with over 1,000 vehicles. The explanation of how to read Table 2 is as follows.

Indicates that surface preparation or cutting is generally not performed in flow-resistant areas. In areas with steep slopes and general areas, special asphalt, high concentration asphalt emulsion, etc. are used as binders.

These include, for example, modified asphalt, rubber-containing asphalt, asphalt with a small amount of solvent added, special filler-added cutback asphalt, high-concentration asphalt emulsion, and high-concentration rubber-containing asphalt emulsion.

The binder of the overlay heated asphalt mixture in overlay or excavation overlay is modified asphalt (containing a relatively large amount of rubber, synthetic polymers, etc.) in flow-resistant areas, steep slope areas, and general areas. Modified asphalt and high viscosity asphalt for flow resistance)
, rubber-containing asphalt, and general asphalt (paving asphalt) are used.

H=10 indicates a construction thickness of 10 cn1. 5+5 (coarse grain + flow resistant) in the flow resistant area in column H-10 is coarse grain Ascon 5 crn thick and flow resistant dense grain Ascon 5 crn thick,
This means that it will be constructed to a thickness of 10tM. 5+ in steep areas
5 (dense grain + dense grain gap) is dense grain size ascon 5crn
Thickness and dense grain gap type ascon 5 cm thickness - T7.10
This means that the construction will be done with a thickness of cm. General area 5+5 (
Coarse grain + dense grain) means that the construction is performed to a thickness of 10 crn, with coarse grain Ascon 5 crn thick and dense grain Ascon 5 crn thick. See the same below. Regarding replacement, the roadbed layer is simply paved, and areas with a traffic volume of less than 1,000 large vehicles are not subject to flow-resistant areas, and the roadbed layer is constructed by on-street recycling in both steep slope areas and general areas, and the surface base layer is covered with overlay. Construct with a mixture according to Section 1. The target treatment category for on-street recycling is H= for large vehicle traffic volume of less than 500 vehicles.
20 cm, H = 500 or more and less than 1000 units
It is set at 25 cm. The replacement is large vehicle traffic volume 1000.
The target area is more than 10,000 yen, and the replacement method conforming to the road maintenance and repair guidelines is used, and the surface/base layer is constructed with a mixture conforming to the overlay section.

Table 2 is structured as described above, and serves as an information table that provides the designer with specifications for specific types of work.

The selection method of the present invention uses a construction method selection chart and a construction selection table consisting of a detailed list of construction types and construction specifications, and takes into account the survey results of road surface properties and various road environments to quickly select maintenance and repair methods. This is a method for selecting the type of work and type of work specifications. The charts used in the method of the present invention include past research results, experience, road environment (traffic volume, residential environment) necessary for maintenance and repair methods.
, the route environment etc. are input as information and scientifically constructed, so the method of the present invention can easily provide designers with reasonably accurate construction type specifications based on road surface condition survey results etc. in a short time. I can do it. As a result, labor, time, expense, etc. can be significantly saved compared to conventional methods.

This has excellent effects such as facilitating the planning and implementation of maintenance and repair plans.

[Brief explanation of the drawing]

FIG. 1 shows an example of a system diagram (flow sheet) of the method for selecting the type of work and the specifications of the type of work in the road pavement maintenance and repair method of the present invention. Figures 2 and 3 show an example of a construction method selection diagram.
In Figure 2, 11... Construction method selection diagram A112...
. . . y-axis of crack rate (C), 13 = y-axis of average rut depth (D), 14 . . . Contour curve of usability index (P8I). 15... Area of replacement method, 16... Area of excavated waste/overlay method, 17... Area of overlay method,
And 18... area of surface treatment method.

Claims (3)

[Claims] (1) Construction method selection diagram for road pavement maintenance and repair methods, and work types and work type specifications designed in advance according to environmental conditions such as large vehicle traffic volume, road environment such as residential environment, route environment, etc. Using the maintenance and repair work type selection table consisting of a detailed table, select a construction method by plotting the road surface survey results of the measured route on the method selection map, and then select the maintenance and repair method according to the work type selection table. A work type selection method for road pavement maintenance and repair work, which is characterized by selecting a work type and work type specifications. (2) The construction method selection map for maintenance and repair works is based on the vertical and horizontal axes of the crack rate and the average rut depth in the transverse direction, which are created for each specific range of large vehicle traffic volume and standard deviation of unevenness in the longitudinal direction. A construction method selection map is created by drawing a contour curve of the serviceability index on the graph taken, and marking areas such as surface treatment work replacement methods, or a construction method selection map created for each specific range of large vehicle traffic volume and serviceability index. Draw a contour curve of the cracking rate on a graph with the vertical and horizontal axes representing the standard deviation of unevenness in the vertical direction and the average rut depth, and then draw contour curves of the cracking rate on this graph. 2. The method for selecting a construction method for road pavement maintenance and repair work according to claim 1, which comprises a construction method selection map in which areas for alternative construction methods, etc. are entered. (3) The maintenance and repair work type selection table corresponds to the surface treatment method, overlay method, bed layer overlay method, replacement method, etc., and the road environment such as large vehicle traffic, residential environment, urban area, outside urban area, etc. Claims 1 and 2 are characterized in that they consist of detailed tables of work types and work type specifications designed in advance according to environmental conditions such as route environments such as flow-resistant areas, steep slope areas, general areas, etc. A method for selecting the type of work for the road pavement maintenance and repair method described in Section 2.