CN108492369B - Three-dimensional filling construction method for roadbed at curve section of high-speed loop in automobile test field - Google Patents
Three-dimensional filling construction method for roadbed at curve section of high-speed loop in automobile test field Download PDFInfo
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- G06—COMPUTING; CALCULATING OR COUNTING
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Abstract
The invention discloses a three-dimensional filling construction method for a curve section roadbed of a high-speed loop road in an automobile experiment field, which comprises the following steps: three-dimensional modeling, data preparation, measurement lofting, material preparation, paving and leveling, partition mixing, test detection, fine leveling, rolling and forming and health preservation. The technology adopts a flat-replacing-curved and three-dimensional filling technology, realizes the accurate control of the boundary lines of different fillers on the same layer, and solves the problem that the normal thickness of different structural layers can not be ensured.
Description
Technical Field
The invention relates to the technical field of construction and civil engineering construction, in particular to a three-dimensional filling construction technology for a roadbed at a curve section of a high-speed loop road in an automobile experiment field.
Background
The automobile test field industry belongs to a novel domestic engineering construction type, has the characteristics of novelty, complex road design line type and various special roads, and mainly meets the requirement of automobile testing. Wherein high-speed circuit is by being "basin cavate" three-dimensional spatial structure that is constituteed of circle curve, straight line, easement curve, and the biggest toe of slope 49 is 39', and contains multiple filling material with the layer, and the road bed is mostly lime soil, brushes the slope at last and forms the curved surface. The cross section of the high-speed loop road bed is in a secondary or tertiary parabola shape, the thickness of the road bed is in a normal thickness, the domestic conventional roadbed filling construction process is not suitable for filling construction of a curve section of the high-speed loop road, ultra-wide filling is mostly adopted in conventional construction, a curved surface is generated by later slope brushing, a boundary line containing various fillers in structural design cannot be accurately positioned, the normal thickness cannot be accurately controlled, the elevation control error is large, the ultra-wide width is inconsistent, filler waste is caused, and the defects of ultra-filling or insufficient filling and the like are easy to occur.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a three-dimensional filling construction technology for a curve section roadbed of a high-speed loop road in an automobile experimental field, adopts a flat-replacing curve and three-dimensional filling technology for the construction of a basin-cavity type roadbed of the high-speed loop road, realizes the accurate control of the boundary lines of different fillers on the same layer, and solves the problem that the normal thickness of different structural layers cannot be ensured.
The invention is realized by the following technical scheme:
a three-dimensional filling construction method for a roadbed at a curve section of a high-speed loop road in an automobile experiment field comprises the following specific steps:
(1) three-dimensional modeling: establishing a curve section roadbed model and three-dimensional sectioning;
wherein said three-dimensional sectioning comprises:
longitudinally sectioning: according to the established three-dimensional model, longitudinal sectioning is firstly carried out, and the longitudinal sectioning line is based on the critical line of the fillers of different structural layers;
transversely sectioning: the transverse sectioning is based on each construction cross section, the distance between the transverse sections is usually the designed construction distance, if the difference between chord arcs is larger due to overlong transverse distance, the sectioning of the cross section is based on the requirement of site construction;
horizontal sectioning: the horizontal cutting line starts from the roadbed reference surface, and the cutting thickness is based on the design thickness of each layer of filling;
(2) preparing data:
finding out each intersection point after the horizontal, longitudinal and transverse sectioning of the model, extracting data from each intersection point, editing and processing the data, sorting out a set of high-speed loop three-dimensional data table, numbering the intersection points in sequence from left to right according to the data of the three-dimensional data table, and numbering the intersection points respectively by A 1 、A 2 ……A 5 、A 6 Longitudinally numbered along the direction of road advancement, the numbers being respectively B 1 、B 2 ……B 5 、B 6 Extracting elevation and coordinate data of each intersection point, and compiling a set of data table according to the elevation and coordinate data extracted by the numbers as the basis for field lofting of measuring personnel;
(3) measuring and lofting: the method comprises the steps of field lofting and square grid spreading;
(4) preparing materials: comprises the steps of material selection, material distribution and edge cutting;
(5) paving and leveling: spreading slaked lime on a road bed, and leveling for the second time;
(6) mixing in a partition manner;
(7) testing and detecting;
(8) refining:
the method comprises the following steps of applying a 3D digital control system, finely leveling different filler zones by using a 3D digital technology, adopting a land leveler at fine leveling, wherein the land leveler is provided with the 3D control system, inputting the elevation of a control point in a data table into an intelligent radio receiving processor, leading the control point into a controller through conversion processing by a transmission system, and adjusting the operation machinery by a mechanical manipulator according to an indication reflected by a display and a displayed elevation difference; the loose paving heights of different filler areas are not consistent, and the boundary lines of fillers with different properties need to be noticed at fine and ordinary times;
(9) rolling and forming;
(10) and (5) preserving health.
The method for establishing the curve section roadbed model comprises the following steps: and (3) sequentially establishing a curve section roadbed model by using a three-dimensional modeling technology according to the design construction drawing size, the structural layer filler and the thickness.
Wherein the on-site lofting further comprises: editing data in the high-speed loop three-dimensional data table into a GPS (global positioning system) to form a line element; before each lofting, an intelligent mobile station is erected, and the GPS is used for checking points; during lofting, a section is horizontally placed according to construction requirements, the vertical direction is determined according to boundary lines of different fillers, and the error of the elevation point is controlled within a certain precision position during lofting.
The method for spreading the square grids comprises the following steps: according to the lofting point positions and the road line types, the curve segments are spread with square grids by using an intelligent ash spreading vehicle, and high-program control piles are arranged at the intersection of the square grids; adopting an intelligent ash spreading vehicle to spread lines longitudinally according to the boundary line of the filling materials; spreading lines transversely according to the determined transverse cutting width; when the line is scattered, the line is required to be smooth, and the line is strictly scattered according to the point of measurement lofting.
The material selection method of the step (4) comprises the following steps: and selecting the roadbed filling material with various technical indexes meeting the specification according to the requirements of the design drawing.
The material distribution method in the step (4) comprises the following steps: according to the square grids which are spread and molded, for different fillers in different filling areas, the square amount required by the filling materials in each square grid is calculated according to the loose paving thickness of each filler determined by the test section, the filling is carried out in different areas when the filling is carried out, the materials cannot be mixed, and a bulldozer is used for roughly leveling after the feeding is finished.
The trimming method of the step (4) comprises the following steps: and in the areas with different filling materials on the same layer, trimming treatment is required to be carried out according to a boundary when one area is filled.
The spreading road bed slaking method comprises the following steps: the square grid is spread twice according to the control points of measurement lofting, the required lime distribution amount of different filler filling areas is calculated by the above method, a loader is used for spreading slaked lime according to the square grid during lime distribution, and the slaked lime amounts required by different fillers in different areas are different.
Wherein the step (6) further comprises: if the filler with larger particle size exists after mixing, the mixing times are increased, and different mixing depths are controlled according to the loose paving thicknesses of different filling materials during mixing.
The invention has the following beneficial effects:
(1) the normal thickness of different structural layers of the curve section is ensured, and the error of the compacted different areas of the same layer is controlled within +/-2 cm. The construction index precision is improved in the spanning property.
(2) According to the construction of the technology, 9 working days can be saved every 10m of the filling speed of the roadbed at the curve section, the purpose of layered filling and layered pre-pressing is achieved, the construction period of piling and loading pre-pressed soil is shortened, the construction progress is accelerated, and the construction period is saved. The ultra-wide width can be ensured to be uniform, the material waste is reduced, and a large amount of cost is saved.
Drawings
Fig. 1 is a three-dimensional modeling diagram according to a first embodiment of the invention.
In the figure:
1-edge-covered strongly weathered rock;
2-lime and fly ash;
3-8% lime soil road bed;
4-12% of a limestone base course;
and 5, pre-compacting the soil.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
According to the invention, a curve section roadbed model is established through a three-dimensional modeling technology, model sectioning is carried out according to the design filling thickness, three-dimensional point data of different fillers are extracted, a three-dimensional point database is formed by summarizing, and finally field lofting, same-layer partition filling, partition mixing and partition rolling forming are carried out according to the point data.
A three-dimensional filling construction method for a roadbed at a curve section of a high-speed loop road in an automobile experiment field comprises the following specific steps:
(1) three-dimensional modeling: establishing a curve section roadbed model and three-dimensional sectioning;
(1.1) establishing a curve section roadbed model:
sequentially establishing a curve section roadbed model according to the size of a design construction drawing, the structure layer filler and the thickness by using a three-dimensional modeling technology;
(1.2) three-dimensional sectioning:
longitudinally sectioning: according to the established three-dimensional model, longitudinal sectioning is firstly carried out, and the longitudinal sectioning line is based on the critical line of the fillers of different structural layers;
transversely sectioning: the transverse sectioning is based on each construction cross section, the distance between the transverse sections is usually the designed construction distance, if the distance between the transverse sections is too long, the chord arc difference is larger, and in order to ensure the normal thickness of the structural layer after slope brushing, the cross section sectioning is based on the on-site construction requirement;
horizontal sectioning: the horizontal cutting line starts from the roadbed reference surface, and the cutting thickness is based on the design thickness of each layer of filling;
(2) preparing data:
finding out each intersection point after the horizontal, longitudinal and transverse sectioning of the model, extracting data from each intersection point, editing and processing the data, sorting out a set of high-speed loop three-dimensional data table, numbering the intersection points in sequence from left to right according to the data of the three-dimensional data table, and numbering the intersection points respectively by A 1 、A 2 ……A 5 、A 6 Longitudinally numbered along the direction of road advancement, the numbers being respectively B 1 、B 2 ……B 5 、B 6 Extracting elevation and coordinate data of each intersection point, and compiling a set of data table according to the elevation and coordinate data extracted by the numbers as the basis for field lofting of measuring personnel;
(3) measurement and lofting: the method comprises the steps of field lofting and square grid spreading;
(3.1) field lofting: accurately editing data in the high-speed loop three-dimensional data table into a GPS to form a line element, erecting an intelligent mobile station before lofting each time, and checking points before using the GPS; during lofting, a section is horizontally placed according to construction requirements, the longitudinal direction is determined according to boundary lines of different fillers, and the error of a height point is controlled within a certain precision direction during lofting;
(3.2) spreading a square grid: in order to ensure construction quality, site constructors use intelligent ash spreading vehicles to spread square grids according to lofting point positions and road line types, and high-program control piles are arranged at the intersection of the square grids; adopting an intelligent ash spreading vehicle to spread lines longitudinally according to the boundary line of the filling materials; spreading lines transversely according to the determined transverse cutting width; when the line is scattered, the line is required to be smooth, and the line is strictly scattered according to the point of measurement lofting;
(4) preparing materials: comprises material selection, material distribution and edge cutting.
(4.1) selecting materials: according to the requirements of a design drawing, various technical indexes are selected to meet the roadbed filling specified above, the materials required by roadbed filling of the curve segment of the test field comprise four types of strongly weathered rock, slaked lime, fly ash and plain soil, and the filling which does not meet the actual requirements is forbidden to be used;
(4.2) material distribution: according to the spread and formed square grids, for different fillers in different filling areas, the required volume of the fillers in each square grid is calculated according to the loose paving thickness of each filler determined by the test section, the fillers are filled in different areas during filling, the materials cannot be mixed, and a bulldozer is used for roughly leveling after the materials are loaded;
(4.3) trimming: in areas with different filling materials on the same layer, trimming processing is required to be carried out according to a boundary line when one area is filled, so that the normal thickness of structural layers of different fillers can meet the design requirement, and the waste of materials can be saved;
(5) paving and leveling: spreading slaked lime on a road bed, and leveling for the second time;
(5.1) spreading road bed slaked lime: and (4) spreading the square grids for the second time according to the control points for measuring lofting, and calculating the ash distribution amount required by different filling areas by using the above method. When distributing the lime, spreading the slaked lime by using a loader according to the square grid. The slaked lime used must be completely digested and dried without caking, and the use of slaked lime which is not completely digested is prohibited. The amount of slaked lime required for different fillers in different zones is different.
(5.2) secondary leveling: and leveling the area where the slaked lime amount is spread in place for the second time by using a grader. In order to prevent the phenomenon of uneven spreading of the slaked lime before mixing, a grader is used for secondary leveling, and the secondary leveling can ensure the spreading uniformity of the slaked lime and the construction quality;
(6) mixing in a partition manner: including the mixing area and the mixing requirement;
(6.1) blending area: and (5) layering according to the roadbed structure of the curve section of the high-speed loop, and sequentially mixing and constructing by using a road mixer.
(6.2) blending requirement: the mixing times of each mixing area are not less than the times required by construction, if fillers with larger particle sizes exist after mixing, the mixing times are increased, and different mixing depths need to be controlled according to the loose paving thicknesses of different filling materials during mixing. The mixing is prevented from being not in place, so that the quality hidden trouble exists;
(7) test detection
After the mixing is finished, a field construction technician informs a laboratory to detect the optimal water content and the optimal ash content, the optimal water content can be properly adjusted according to the field construction temperature, and the measured value of the ash content must be larger than the designed value.
(8) Medicine for treating fine hair
And (8.1) applying a 3D digital control system. The advanced 3D digitization technology is used for finely leveling the partitions of different fillers, a land leveler is adopted at the fine leveling time, a 3D control system is arranged on the land leveler, the control point elevation in the data sheet is only required to be input into an intelligent radio receiving processor, the control point elevation is led into a controller through conversion processing and a transmission system, and a mechanical manipulator adjusts the operation machinery according to indication reflected by a display and the displayed elevation difference;
(8.2) loose paving heights of different filler areas are not consistent, and boundary lines of fillers with different properties need to be noticed at ordinary times to prevent the elevation of the area with high loose paving thickness from being scraped down, so that the compaction degree after rolling cannot meet the requirement, and the quality hidden danger is caused;
(9) rolling and forming:
after finishing fine leveling of each area, rolling is carried out immediately, because the filling properties of different areas are different, the mechanical combination of rolling is different, the rolling modes of different areas are required to be noticed during rolling, the phenomena of pressure leakage and overpressure cannot occur, if the problems of springs, cracks and large-area peeling occur during rolling, the soil road needs to be mixed and rolled again, the mixed lime soil subgrade or two-ash subgrade does not need to be placed for a long time, the rolling is finished on the same day after the mixing, because the lime soil has hydraulic property, the water content is lower than the optimal water content and has certain strength after the long-time placement, the soil road can be loosened during rolling, the later strength cannot meet the design requirements, and when the lime soil subgrade is applied, the leveling is strictly forbidden by a thin-layer patching method;
(10) health preserving:
the lime soil should keep certain humidity during the curing period, should not be over-wet or suddenly dry and suddenly wet, and the curing period should not be less than the days required by construction, after each watering. The geotextile is adopted for covering during the health preserving period, so that the phenomenon of dry and wet is avoided, and the normal enhancement of the strength is ensured.
The first embodiment is as follows:
the tire test field project, the high-speed runway is a closed continuous road composed of straight lines, gentle curves and circular curves, the total length is 5301.828m, and the length of the straight line section is 1495.5 m; the relaxation curve adopts a Mackanel curve, and the length of the relaxation curve is 280 m; the radius of the circular curve is 275 m. The three-dimensional filling construction of the roadbed at the curve section of the high-speed loop comprises the following steps:
1. three-dimensional modeling:
(1) establishing a curve section roadbed model:
the roadbed structure of the curve section of the engineering high-speed loop sequentially comprises strong weathered rock (1) covered with edges, lime and fly ash, wherein the two-ash soil (2) is formed by the strong weathered rock (1) and the lime and the fly ash and the two-ash soil are from left to right and are from 8% to 12% to a lime soil roadbed (3) to 12% to a lime soil subbase layer (4) to 5). The thickness of the structural layer is 1m of the edge-covered weathered rock from left to right in sequence; the lime soil is in a ladder shape, and the width of the lime soil is narrowed along with the increase of the height; the normal thickness of the 8% lime soil road bed is 0.8 m; the normal thickness of the 12% lime soil subbase layer is 0.2 m; the normal thickness of the pre-compacted soil is 1 m.
And (4) establishing a three-dimensional curve section roadbed model by using a BIM technology according to the design construction drawing size and the roadbed structure layer design.
(2) Three-dimensional sectioning:
longitudinally sectioning: according to the established three-dimensional model, longitudinal sectioning is firstly carried out, and the longitudinal sectioning line is based on the packing critical lines of different structural layers. The longitudinal dividing line is totally 6 lines (containing two side lines) from left to right, and the radius of the curve of the cutting line is 275 m.
Transversely sectioning: the transverse sectioning line is based on each construction cross section, the distance between the transverse sections is usually 20m, the curve radius of the curve section of the high-speed loop is 275m, if the transverse distance is too long, the chord arc difference is large, and in order to ensure the normal thickness of the structural layer after slope brushing, the cross section is sectioned by 10 m.
Horizontal sectioning: and a horizontal cutting line starts from the roadbed reference surface, and the horizontal cutting thickness is designed to be the same as the filling thickness of each layer.
2. Preparing data:
finding out each intersection point after the horizontal, longitudinal and transverse cutting of the model. And extracting data from each intersection point, editing and processing the data, and sorting out a set of high-speed loop three-dimensional data table. And extracting elevation and coordinate data of each intersection point. And compiling a set of data table according to the elevation and coordinate data extracted by the serial numbers as the basis for field lofting of the survey crew.
Table 1 part point number coordinate and elevation parameter
3. Survey lofting
(1) Field lofting:
using GPS lofting, firstly, accurately editing the data in the high-speed loop three-dimensional data table into a GPS to form a line element. Before each lofting, an intelligent mobile station needs to be erected, and the GPS is used for checking. And (3) placing a cross section at 10m in the transverse direction during lofting, placing a control point at 10m in the longitudinal direction based on the boundary of different fillers, and controlling the error of the elevation point at +/-1 cm during lofting.
(2) Spreading a square grid:
and in order to ensure the construction quality, a pile number point is placed every 10m in the longitudinal direction of the curve section. The site construction technician uses the intelligent dusting vehicle to spread 10 × 10m square grids according to the confirmed points by lofting, and lays elevation control points at the intersection points of the square grids.
And adopting an intelligent ash spreading vehicle to spread lines longitudinally according to the boundary line of the filling materials, and spreading the lines transversely according to the determined transverse cutting width. When the line is scattered, the line is required to be smooth and spread strictly according to the point of measurement lofting.
(3) Laying elevation points:
and laying elevation control points according to intersection points formed by the three-dimensional cutting lines, wherein the elevation control points are formed by stacking common roadbed fillers. The elevation control points are determined according to the number of the intersection points of the three-dimensional sectioning, and can be arranged in an encrypted manner if necessary. The loose paving thickness of the lime soil area is different from the loose paving coefficient of the lime soil area, so that the filling height of the lime soil area is different from that of the lime soil area. The loose paving thickness of the lime soil region is 28cm, and the loose paving thickness of the lime soil subgrade region is 24 cm.
4. Preparing materials:
and preparing a soil source according to the size of the square grid and the calculated filler amount in the early stage. When preparing materials, at least 12 transport vehicles with the volume of 19 square are used, and the excavator 2 platform used for loading soil is used.
5. Leveling and mixing:
(1) in rough and ordinary times, 2 bulldozers are used, the loose-laying elevation control is based on the elevation control pile top, and the error cannot exceed the range of +/-2 cm. In rough and ordinary times, the boundary between different fillers in the same layer needs to be strictly controlled, and if the boundary has an unqualified position, the boundary needs to be trimmed by a loader.
(2) Ash distribution and mixing:
after rough leveling, distributing lime in different areas, wherein the lime distribution amount is calculated according to an external mixing method, the lime dosage in the roadbed area is 8%, the lime dosage in the base layer area is 12%, and the lime ratio in the two-lime soil area is (volume ratio 95: 5). And when ash is distributed, a grader is used for leveling, and a loader is used for trimming positions with more and less cloth.
And (3) mixing by using a road mixer after ash distribution is finished, wherein the mixing width of each path is overlapped by 20-30cm during mixing, and the mixing depth reaches 23cm optimally.
6. Fine flattening and rolling:
(1) refining:
in the fine leveling process, a grader provided with a 3D digital control system is used, only the elevation of a control point in a data table is input into an intelligent radio receiving processor, the control point is converted and guided into a controller by a transmission system, and a mechanical operator adjusts the operation machine according to the indication reflected by a display and the displayed elevation difference. The number of fine leveling passes is 3 times, and the elevation control precision is +/-5 mm.
The loose paving heights of different filler areas are not consistent, the boundary lines of fillers with different properties need to be noticed at ordinary times, and the problem that the height of the area with high loose paving thickness is scraped down to cause that the compaction degree cannot meet the requirement after rolling and the quality hidden danger is caused is solved.
(2) Rolling:
after each zone is finished, rolling is performed immediately, and the mechanical combination of rolling is different due to different filler properties of different zones. When rolling, different rolling modes of different areas need to be paid attention to, and the phenomena of pressure leakage and overpressure cannot occur. If the problems of spring, crack and large-area peeling occur during rolling, the rolling treatment needs to be carried out again. The blended lime soil roadbed or two-ash roadbed should not be placed for a long time and should be rolled on the same day after the blending, because the lime soil has hydraulicity, the water content of the lime soil after the long-time placement is lower than the optimal water content and has certain strength. The roller compaction can cause looseness, and the later strength can not meet the design requirement.
During rolling, the mechanical combination of the two-ash area comprises 6 times of rolling by a three-steel-wheel road roller, 3 times of static pressure of a lime soil road bed and a base layer area, 3 times of rolling by a single-steel-wheel road roller and 3 times of vibration rolling.
TABLE 2 concrete rolling mode of each area
| Serial number | Crushed area | Rolling machine | Number of weak vibration passes | Number of strong oscillations | Number of passes of |
| 1 | Edge-wrapped strong weathering rock | Single steel |
2 | 2 | 1 |
| 2 | Two-ash soil | Three steel wheel road roller | / | / | 6 |
| 3 | 8% lime soil road bed | Single steel |
1 | 3 | 2 |
| 4 | 12% lime soil sub-base | Single steel |
1 | 3 | 2 |
7. Health preserving
The limestone soil should keep certain humidity during the curing period and should not be over-wet or suddenly wet. The life-preserving period is not less than 7 days. After each watering. The geotextile is adopted for covering during the health preserving period, so that the phenomenon of dry and wet is avoided, and the normal enhancement of the strength is ensured.
8. Curved surface brushing slope forming
When the slope is brushed, an excavator provided with a 3D digital control system is used for brushing the slope in a partitioning and segmenting mode.
The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, which may be made by the methods and technical solutions of the present invention or may be applied to other fields without modification.
Claims (9)
1. A three-dimensional filling construction method for a roadbed at a curve section of a high-speed loop road in an automobile experiment field comprises the following specific steps: (1) three-dimensional modeling: establishing a curve section roadbed model and three-dimensional sectioning;
wherein said three-dimensional sectioning comprises:
longitudinally sectioning: according to the established three-dimensional model, longitudinal sectioning is firstly carried out, and the longitudinal sectioning line is based on the critical line of the fillers of different structural layers;
transversely sectioning: the transverse sectioning takes each construction cross section as a standard, the spacing between the transverse sections is usually the design construction distance, if the chord arc difference is larger due to overlong transverse spacing, the sectioning of the cross section takes the site construction requirement as a standard;
horizontal sectioning: the horizontal cutting line starts from the roadbed reference surface, and the cutting thickness is based on the design thickness of each layer of filling;
(2) preparing data:
finding out each intersection point after the horizontal, longitudinal and transverse sectioning of the model, extracting data from each intersection point, editing and processing the data, sorting out a set of high-speed loop three-dimensional data table, numbering the intersection points in sequence from left to right according to the data of the three-dimensional data table, and numbering the intersection points respectively by A 1 、A 2 ……A 5 、A 6 Longitudinally numbered along the direction of road advancement, the numbers being respectively B 1 、B 2 ……B 5 、B 6 Extracting elevation and coordinate data of each intersection point, and compiling a set of data table according to the elevation and coordinate data extracted by the numbers as the basis for field lofting of measuring personnel;
(3) measurement and lofting: the method comprises the steps of on-site lofting and square grid spreading;
(4) preparing materials: comprises the steps of material selection, material distribution and edge cutting;
(5) paving and leveling: spreading slaked lime on a road bed, and leveling for the second time;
(6) mixing in a partition manner;
(7) testing and detecting;
(8) fine leveling:
the method comprises the following steps of applying a 3D digital control system, finely leveling different filler zones by using a 3D digital technology, adopting a land leveler at fine leveling, wherein the land leveler is provided with the 3D control system, inputting the elevation of a control point in a data table into an intelligent radio receiving processor, leading the control point into a controller through conversion processing by a transmission system, and adjusting the operation machinery by a mechanical manipulator according to an indication reflected by a display and a displayed elevation difference; the loose paving heights of different filler areas are not consistent, and the boundary lines of fillers with different properties need to be noticed at normal times;
(9) rolling and forming;
(10) and (5) preserving health.
2. The three-dimensional filling construction method for the curve segment roadbed of the high-speed loop road in the automobile test field according to claim 1, is characterized in that: the method for establishing the curve section roadbed model comprises the following steps: and (3) sequentially establishing a curve section roadbed model by using a three-dimensional modeling technology according to the design construction drawing size, the structural layer filler and the thickness.
3. The three-dimensional filling construction method for the curve section subgrade of the high-speed loop road in the automobile laboratory according to the claim 1, characterized in that: wherein the on-site lofting further comprises: editing data in the high-speed loop three-dimensional data table into a GPS (global positioning system) to form a line element; before each lofting, an intelligent mobile station is erected, and point calibration is carried out before a GPS is used; during lofting, a section is horizontally placed according to construction requirements, the vertical direction is determined according to boundary lines of different fillers, and the error of the elevation point is controlled within the precision position during lofting.
4. The three-dimensional filling construction method for the curve segment roadbed of the high-speed loop road in the automobile test field according to claim 1, is characterized in that: the method for spreading the square grids comprises the following steps: according to the lofting point positions and the road line types, the curve segments are spread with square grids by using an intelligent ash spreading vehicle, and high-program control piles are arranged at the intersection of the square grids; adopting an intelligent ash spreading vehicle to spread lines longitudinally according to the boundary line of the filling materials; spreading lines transversely according to the determined transverse cutting width; when the line is scattered, the line is required to be smooth, and the line is strictly scattered according to the point of measurement lofting.
5. The three-dimensional filling construction method for the curve segment roadbed of the high-speed loop road in the automobile test field according to claim 1, is characterized in that: the material selection method of the step (4) comprises the following steps: and selecting the roadbed filling material with various technical indexes meeting the specification according to the requirements of the design drawing.
6. The three-dimensional filling construction method for the curve segment roadbed of the high-speed loop road in the automobile test field according to claim 1, is characterized in that: the material distribution method in the step (4) comprises the following steps: according to the spread and formed square grids, for different fillers in different filling areas, the required volume of the fillers in each square grid is calculated according to the loose paving thickness of each filler determined by the test section, the fillers are filled in different areas during filling, the materials cannot be mixed, and a bulldozer is used for rough leveling after the materials are loaded.
7. The three-dimensional filling construction method for the curve segment roadbed of the high-speed loop road in the automobile test field according to claim 1, is characterized in that: the trimming method of the step (4) comprises the following steps: and in the areas with different filling materials on the same layer, trimming treatment is required to be carried out according to a boundary when one area is filled.
8. The three-dimensional filling construction method for the curve segment roadbed of the high-speed loop road in the automobile test field according to claim 1, is characterized in that: the spreading road bed slaking method comprises the following steps: the square grid is spread twice according to the control points of measurement lofting, the required lime distribution amount of different filler filling areas is calculated by the above method, a loader is used for spreading slaked lime according to the square grid during lime distribution, and the slaked lime amounts required by different fillers in different areas are different.
9. The three-dimensional filling construction method for the curve section subgrade of the high-speed loop road in the automobile laboratory according to the claim 1, characterized in that: wherein the step (6) further comprises: if the filler with larger particle size exists after mixing, the mixing times are increased, and different mixing depths are controlled according to the loose paving thicknesses of different filling materials during mixing.
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| DE102014007914A1 (en) * | 2014-05-27 | 2015-12-03 | Elektrobit Automotive Gmbh | Graphing roads and routes using hardware tessellation |
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