Road intersection construction method based on BIM model

Abstract

The application relates to a road intersection construction method based on a BIM model, which comprises the following steps: S1, establishing a BIM model; S2, correcting the BIM model; S3, roadbed construction; S4, cushion layer construction; S5, base layer construction; S6, curb construction; S7, surface layer construction; and S8, marking line construction. According to the vertical design drawing of the intersection, the BIM three-dimensional model of the road intersection is established through the BIM technology, then the BIM three-dimensional model is connected with the intelligent measurement and lofting equipment to realize real-time lofting, the structure layer elevation of the road intersection is monitored and adjusted in real time, the transition section of the intersection is smooth and beautiful, the elevation of the intersection after construction meets the design requirements, and the elevation deviation meets the relevant specification requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road construction, in particular to a road intersection construction method based on a BIM model. BACKGROUND

[0002] With the development of urban construction process and the improvement of people's living standards, more and more vehicles are used in cities. However, the construction strength and quality of urban roads often cannot keep up with the speed of urban development. In the process of road construction, the construction of road intersections has always been a difficulty in road construction, mainly in the elevation control of road intersection construction.

[0003] At present, when a city road intersection is constructed, a design drawing provided by a design institute is usually used to mark a reference point at the road intersection, and multiple control points are marked at the road intersection edge line and circular curve. According to the elevation in the vertical design drawing of the road intersection provided by the design institute, the reference point and the control points are connected by a line, and the elevation of the road intersection is controlled by using the line.

[0004] However, the vertical design drawing of the road intersection is a plan view, and cannot directly reflect whether the elevations of the various control points can be smoothly transitioned, whether the road transverse and longitudinal slopes conflict, whether the road intersection straight and curved transition is not smooth, and the like, which directly affects the smoothness of the road intersection after construction. The method of controlling the elevation by the line can only ensure the elevations of the control points at both ends of the line, and the elevations in the middle are difficult to control, which makes it difficult to ensure the construction precision. After the road structure layer is constructed, the local elevation often does not conform to the design elevation, which leads to the unevenness of the road surface after construction and affects the comfort requirement of people on the road. SUMMARY

[0005] Therefore, in order to overcome the problems of the prior art, the present application provides a road intersection construction method based on a BIM model. The method is to establish a BIM three-dimensional model of the road intersection according to a vertical design drawing of the intersection by using BIM technology, then connect the BIM three-dimensional model with an intelligent measurement and lofting device to perform real-time lofting, and monitor and adjust the elevation of the structure layer of the road intersection in real time, so as to ensure the smoothness and beauty of the transition section of the intersection, make the elevation of the intersection after construction meet the design requirements, and make the elevation deviation meet the relevant specification requirements.

[0006] In order to achieve the above-mentioned purpose, the technical scheme provided by the present application is as follows:

[0007] A road intersection construction method based on a BIM model, comprising the following construction steps:

[0008] S1, constructing a BIM model of a road intersection according to a vertical design drawing of the road intersection;

[0009] S2, correcting the BIM model

[0010] Amend the straight and curved transition irregularities, local elevation transition irregularities, road transverse and longitudinal slope conflicts in the BIM model;

[0011] S3, subgrade construction

[0012] S31, positioning and setting out

[0013] Determine the road intersection site setting-out points and control points from the corrected BIM model, and use intelligent surveying and setting-out equipment to set out at the road intersection to form a road intersection construction area,

[0014] S32, excavate the subgrade trench

[0015] Excavate the soil and stone in the construction area and compact and tamp to form a soil base layer;

[0016] S33, subgrade trench backfill treatment

[0017] Pave and compact the backfill soil in the subgrade trench, finish the road arch, and compact and tamp to form a subgrade;

[0018] S4, cushion construction

[0019] S41, measure the actual elevations of each control point on the subgrade surface using intelligent surveying and setting-out equipment, and import the data into the BIM model. Adjust the BIM model according to the actual elevations of each control point on the subgrade surface, and obtain the amount of cushion filler and the stacking position of each vehicle of cushion filler from the adjusted BIM model;

[0020] S42, transport and stack the cushion filler, and pave, compact and tamp the stacked cushion filler to form a cushion;

[0021] S5, base construction

[0022] S51, measure the actual elevations of each control point on the cushion surface using intelligent surveying and setting-out equipment, and import the measurement data into the BIM model. Adjust the BIM model according to the actual elevations of each control point on the cushion surface, and obtain the amount of base filler from the adjusted BIM model, and determine the setting-out points from the adjusted BIM model;

[0023] S52, use intelligent surveying and setting-out equipment to set out on the subgrade surface;

[0024] S53, pave the base filler on the subgrade surface and compact and tamp;

[0025] S54, detect the compactness, and complete the base construction after the compactness meets the design requirements;

[0026] S6, curb construction

[0027] S61, measure the actual elevation of the base surface of each control point by using the intelligent measurement and lofting equipment, import the measurement data into the BIM model, adjust the BIM model according to the measurement data, and obtain the amount of side curb stone and curb stone, side curb stone and curb stone control points and lofting points from the adjusted BIM model;

[0028] S62, lofting on the base surface by using the intelligent measurement and lofting equipment to form the installation area of the side curb stone and curb stone;

[0029] S63, groove on the base surface, level the groove bottom, manually install the side curb stone and curb stone in the groove, and form the curb;

[0030] S7, surface layer construction

[0031] S71, determine the surface layer lofting point from the adjusted BIM model in step S61, loft on the base surface by using the intelligent measurement and lofting equipment; and obtain the amount of surface layer filler from the adjusted BIM model;

[0032] S72, evenly spread the surface layer filler and compact it;

[0033] S73, detect the compaction degree, and complete the surface layer construction after the compaction degree meets the design requirements;

[0034] S8, marking construction

[0035] Use the intelligent measurement and lofting equipment to perform traffic marking lofting on the surface layer surface according to the BIM model, and finally use the traffic marking construction equipment to perform traffic marking line construction on the surface layer surface;

[0036] Thus, the construction of the road intersection is completed.

[0037] Further, in the step S33, when the roadbed groove backfilling treatment is performed, first, measure the elevation of each control point on the soil base surface by using the intelligent measurement and lofting equipment, import the data into the BIM model, and obtain the amount of roadbed groove backfilling soil and the stacking position of each vehicle backfilling soil from the BIM model;

[0038] Then, after stacking the backfilling soil to the corresponding position, spread the backfilling soil by using the land leveler and finish the road arch;

[0039] Then, measure the elevation of each control point on the surface of the loose backfilling soil by using the intelligent measurement and lofting equipment, import the elevation data into the BIM model, and analyze whether the elevation of each control point meets the design requirements by the BIM model, and give the data of reducing or supplementing material, and manually reduce or supplement the material according to the data;

[0040] After the elevations of each control point on the surface of the backfilling soil meet the design requirements, mechanically compact and compact, and complete the roadbed construction after the compaction degree meets the design requirements.

[0041] Further, the step S4 cushion construction, the way of layered construction is used to construct the cushion, the elevation of the control point of each layer of cushion, the dosage of each layer of cushion filler, and the stacking position of each layer of cushion filler are obtained from the adjusted BIM model;

[0042] The cushion filler is spread from bottom to top in layers. After the spreading of each layer of cushion filler, the elevation of each control point of the spread cushion filler surface is measured by using the intelligent measuring and lofting equipment, and the elevation data is imported into the BIM model. The BIM model analyzes whether the elevation of each control point meets the design requirements, and gives the data of material reduction or supplement. The material is manually reduced or supplemented according to the data. After the elevation of each control point of the surface meets the design requirements, the next layer of cushion filler is spread after mechanical rolling and tamping.

[0043] Further, the step S53 of spreading the base layer filler is to use the transport vehicle to assist the spreader to uniformly spread the base layer filler on the roadbed, and the spread surface is required to be flat and have a specified road crown. Then, the intelligent measuring and lofting equipment is used to detect the base layer spread thickness and the base layer surface elevation of each detection point, and the data is imported into the BIM model to analyze whether the elevation of each control point meets the design requirements. If necessary, the material is manually reduced or supplemented. After the elevation of each control point meets the design requirements, the rolling is performed.

[0044] Further, the base layer filler is a mixture of cement, lime, gravel, sand and water uniformly mixed.

[0045] Further, the step S6 of curb construction is that for the curb construction of the straight section of the road intersection, the control points can be set at both ends and / or in the middle of the straight section, and the elevations and installation positions of the side flat stones and the curb stones of the straight section are controlled by the way of control point stringing. For the construction of the side flat stones and the curb stones of the curved section of the road intersection, the intelligent measuring and lofting equipment is used to monitor the elevations and installation positions of each side flat stone and curb stone.

[0046] Further, the step S7 of surface layer construction is that the surface layer is one or more layers. When the surface layer is multiple layers, the construction is from bottom to top in layers, and the filler of one layer of surface layer is spread and rolled before the construction of the next layer of surface layer.

[0047] Further, when the surface layer filler is spread, the transport vehicle is used to assist the spreader to uniformly spread the surface layer filler on the base layer, and the spread surface is required to be flat and have a specified road crown. Then, the intelligent measuring and lofting equipment is used to detect the surface layer spread thickness and the surface elevation of each control point of the surface layer filler, and the data is imported into the BIM model to analyze whether the elevation of each control point meets the design requirements. If necessary, the material is manually reduced or supplemented. After the elevation of each control point meets the design requirements, the rolling is performed.

[0048] Furthermore, the intelligent measurement and layout equipment is a BIM layout robot.

[0049] The beneficial effects of the present invention are:

[0050] 1. The present invention establishes a BIM three-dimensional model of a road intersection through BIM technology based on the vertical design drawing of the intersection, then connects the BIM three-dimensional model to intelligent measurement and layout equipment for real-time layout, and monitors and adjusts the elevation of the road intersection structure layer in real time to ensure that the transition section of the intersection is smooth and beautiful, so that the elevation of the intersection after construction meets the design requirements and the elevation deviation meets the requirements of relevant specifications.

[0051] 2. The present invention establishes a BIM model to intuitively reflect the designed road intersection conditions, making it easy to discover design deficiencies or flaws in advance and to correct the BIM model so that the transitions between straight and curved lines in the BIM model are smooth, the transitions between local elevations are smooth, and the horizontal and vertical slopes of the road do not conflict and the transitions are smooth. This can effectively solve the problem that the existing road surface unevenness cannot be discovered in advance during construction based on vertical design drawings.

[0052] 3. During the construction of the cushion layer, the base layer and the surface layer of the present invention, the BIM model is adjusted according to the actual elevation of each control point, and the construction is guided by the adjusted BIM model. The model is closely integrated with the actual construction, and the BIM model is adjusted in time according to the actual construction situation to avoid the accumulation of differences between the actual construction and the design, providing a basis for the elevation after the construction is completed to meet the design requirements.

[0053] 4. The construction method of the present invention is simple and easy to operate, has low construction cost, low difficulty in quality control, good appearance, and can effectively improve construction efficiency, shorten construction period and reduce cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the construction process of the present invention. DETAILED DESCRIPTION

[0055] The present invention is further described in detail below with reference to the accompanying drawings:

[0056] like Figure 1 As shown, a road intersection construction method based on a BIM model includes the following construction steps:

[0057] S1. Construct a BIM model of the road intersection based on the vertical design drawing of the road intersection;

[0058] S2. Modify the BIM model

[0059] Corrected the problems of straight road intersections, uneven curve transitions, uneven local elevation transitions, and conflicts between horizontal and vertical slopes of roads in the BIM model;

[0060] S3, subgrade construction

[0061] S31, positioning and layout

[0062] Determine the road intersection site layout points and control points from the corrected BIM model, and use the BIM layout robot to layout at the road intersection to form the road intersection construction area;

[0063] In this embodiment, the BIM layout robot adopts a BIM layout robot. In this embodiment, the center point of the road intersection is taken as the reference point, a total station host of the BIM layout robot is erected at the reference point, the corrected BIM model is imported into the field tablet computer, the layout points in the BIM model are selected through the tablet computer, the total station host emits an infrared laser to automatically aim at the construction site layout point, the layout point is accurately reflected to the construction site, and the layout is performed by drawing a line with lime according to the layout point.

[0064] S32, excavate the subgrade trench

[0065] Excavate the construction area soil and stone and perform rolling and tamping to form a soil base layer;

[0066] According to the geological conditions, excavate the subgrade trench, clean the surface in the layout construction area, excavate the humus soil layer and soft soil layer in the construction area, and if necessary, lay gravel in the subgrade trench, and then use a road roller to roll and tamp the subgrade trench to form a soil base layer.

[0067] S33, subgrade trench backfill treatment

[0068] Spread and lay backfill soil in the subgrade trench, trim the road arch, and roll and tamp to form a subgrade;

[0069] First, the BIM layout robot measures the actual elevations of each control point on the surface of the soil base layer, and imports the data into the BIM model to obtain the amount of backfill soil for the subgrade trench and the stacking position of each vehicle of backfill soil from the BIM model;

[0070] Then, after stacking the backfill soil at the corresponding position, spread the backfill soil by a land leveler and trim the road arch;

[0071] Then, use the BIM layout robot to measure the elevations of each control point on the surface of the loose backfill soil, and import the elevation data into the BIM model. The BIM model analyzes whether the elevations of each control point meet the design requirements, and gives the data of material reduction or supplement, and manually reduces or supplements the material according to the data;

[0072] After the elevations of each control point on the surface of the backfill soil meet the design requirements, mechanically roll and tamp, and complete the subgrade construction after the compaction degree meets the design requirements.

[0073] S4, cushion construction

[0074] S41, the BIM lofting robot measures the actual elevations of each control point of the subgrade surface, and imports the data into the BIM model, adjusts the BIM model according to the actual elevations of each control point of the subgrade surface, and obtains the amount of cushion filler and the stacking position of each vehicle of cushion filler from the adjusted BIM model;

[0075] S42, the cushion filler is transported and stacked, and the stacked cushion filler is spread, rolled and compacted to form a cushion;

[0076] In this embodiment, the cushion is constructed by layering, and the cushion is divided into upper and lower layers, and the lower cushion and the upper cushion are constructed from bottom to top,

[0077] First, the BIM lofting robot measures the actual elevations of each control point of the subgrade surface, and imports the data into the BIM model, adjusts the BIM model according to the actual elevations of each control point of the subgrade surface, and obtains the amount of cushion filler and the stacking position of each vehicle of cushion filler from the adjusted BIM model;

[0078] When adjusting the BIM model, the lower end face of the lower cushion in the BIM model is mainly adjusted to make the lower end face of the lower cushion fit the actual upper surface of the subgrade.

[0079] The cushion filler is transported and stacked in place with the assistance of the BIM lofting robot, the cushion filler is spread by a bulldozer and a grader, the spread surface is required to be flat and have a specified road crown, after the lower layer of cushion filler is spread, the BIM lofting robot measures the elevations of each control point of the spread cushion filler surface, and imports the elevation data into the BIM model, the BIM model analyzes whether the elevations of each control point meet the design requirements, and gives the data of reducing or supplementing material, and manually reduces or supplements the material according to the data, and after the elevations of each control point of the surface meet the design requirements, the cushion filler is compacted by a road roller.

[0080] The BIM lofting robot measures the actual elevations of each control point of the lower layer of cushion surface again, and imports the data into the BIM model, adjusts the BIM model according to the actual elevations of each control point of the lower layer of cushion surface, and obtains the amount of cushion filler of the upper cushion and the stacking position of each vehicle of cushion filler from the adjusted BIM model;

[0081] When adjusting the BIM model, the lower end face of the lower cushion in the BIM model is mainly adjusted to make the lower end face of the lower cushion fit the actual upper surface of the subgrade.

[0082] Transport the cushion filler and stack the cushion filler on the upper cushion surface with the aid of the BIM lofting robot, spread the cushion filler with the aid of a bulldozer and a grader, the spread surface is required to be flat and have a specified road crown; after the upper cushion filler is spread, the BIM lofting robot is used to measure the elevations of various control points on the spread cushion surface and the elevation data is imported into the BIM model, the BIM model analyzes whether the elevations of various control points meet the design requirements and gives data for reducing or supplementing the cushion filler, the cushion filler is manually reduced or supplemented according to the data, and after the elevations of various control points on the surface meet the design requirements, the surface is compacted with a road roller, thus completing the cushion construction.

[0083] S5, base construction

[0084] S51, the BIM lofting robot is used to measure the actual elevations of various control points on the cushion surface and import the measurement data into the BIM model, the BIM model is adjusted according to the actual elevations of various control points on the cushion surface, the amount of base filler is obtained from the adjusted BIM model, and the lofting points are determined from the adjusted BIM model,

[0085] When the BIM model is adjusted, the lower end surface of the base in the BIM model is mainly adjusted so that the lower end surface of the base is fitted with the upper end surface of the actual cushion.

[0086] S52, the BIM lofting robot is used to loft on the cushion surface;

[0087] S53, the base filler is spread on the cushion surface and is compacted and tamped;

[0088] The base filler is a mixture of cement 50 kg, lime 300 kg, crushed stone 400 kg, sand 50 kg and water 50 kg, and the particle size of the crushed stone is less than or equal to 10 mm.

[0089] When the base filler is spread, the base filler is uniformly spread on the roadbed with the aid of a transport vehicle and a spreader, the spread surface is required to be flat and have a specified road crown; then, the BIM lofting robot is used to detect the base spread thickness and the base surface elevation of various detection points and import the data into the BIM model, analyze whether the elevations of various control points meet the design requirements, manually reduce or supplement the base filler if necessary, and then compact after the elevations of various control points meet the design requirements.

[0090] S54, the compactness is detected, and the base construction is completed after the compactness meets the design requirements.

[0091] S6, curb construction

[0092] S61, measure the actual elevation of the base surface of each control point by using the BIM lofting robot, import the measurement data into the BIM model, adjust the BIM model according to the measurement data, obtain the amount of side curb stone and curb stone, side curb stone and curb stone control points and lofting points from the adjusted BIM model, for the construction of the curb stone of the straight section of the road intersection, set control points at both ends of the straight section, and for the curved section of the road intersection, take the two ends and the middle point of each side curb stone and curb stone as control points;

[0093] When adjusting the BIM model, the main adjustment is to adjust the lower end surface of the surface layer of the BIM model, so that the lower end surface of the surface layer is fitted with the upper surface of the base layer.

[0094] S62, lofting on the base surface by using the BIM lofting robot to form the installation area of the side curb stone and curb stone;

[0095] S63, groove on the base surface and flatten the groove bottom, manually install the side curb stone and curb stone in the groove, and control the elevation and installation position of the side curb stone and curb stone at both ends of the straight section by using the control points. For the construction of the side curb stone and curb stone of the curved section of the road intersection, the elevation and installation position of each side curb stone and curb stone can be monitored by using the BIM lofting robot. After the installation of the side curb stone and curb stone of the road intersection is completed, the curb stone is formed.

[0096] S7, surface layer construction

[0097] S71, determine the surface layer lofting point from the adjusted BIM model in step S61, and loft on the base surface by using the BIM lofting robot; and obtain the amount of surface layer filler from the adjusted BIM model,

[0098] S72, evenly spread the surface layer filler and compact it,

[0099] S73, detect the compaction degree, and complete the surface layer construction after the compaction degree meets the design requirements;

[0100] In this embodiment, the surface layer is divided into upper surface layer, middle surface layer and lower surface layer from top to bottom. During the surface layer construction, the lower surface layer is constructed first, then the middle surface layer, and finally the upper surface layer.

[0101] When the lower layer is constructed, the BIM lofting robot is used to loft on the surface of the base layer; the amount of filler for the lower layer is obtained from the adjusted BIM model, the transport vehicle is used to assist the paver to uniformly spread the surface layer filler on the base layer, the surface is required to be flat and have a specified road crown, then the BIM lofting robot is used to detect the loose paving thickness of the lower layer and the surface elevation of the lower layer filler at each control point, the data is imported into the BIM model, whether the elevation of each control point meets the design requirements is analyzed, if necessary, manual reduction or supplement of the filler is performed, and after the elevation of each control point meets the design requirements, rolling is performed. The compaction degree is detected, and after the compaction degree meets the design requirements, the lower layer construction is completed;

[0102] After the lower layer construction is completed, the BIM lofting robot is used to measure the actual elevation of each control point on the surface of the lower layer, and the data is imported into the BIM model. The amount of surface layer filler for the middle surface layer is obtained from the adjusted BIM model according to the actual elevation of each control point, the transport vehicle is used to assist the paver to uniformly spread the surface layer filler on the surface of the lower layer, the surface is required to be flat and have a specified road crown, then the BIM lofting robot is used to detect the loose paving thickness of the middle surface layer and the surface elevation of the middle surface layer filler at each control point, the data is imported into the BIM model, whether the elevation of each control point meets the design requirements is analyzed, if necessary, manual reduction or supplement of the filler is performed, and after the elevation of each control point meets the design requirements, rolling is performed. The compaction degree is detected, and after the compaction degree meets the design requirements, the middle surface layer construction is completed;

[0103] After the middle surface layer construction is completed, the BIM lofting robot is used to measure the actual elevation of each control point on the surface of the middle surface layer, and the data is imported into the BIM model. The amount of surface layer filler for the upper surface layer is obtained from the adjusted BIM model according to the actual elevation of each control point, the transport vehicle is used to assist the paver to uniformly spread the surface layer filler on the surface of the middle surface layer, the surface is required to be flat and have a specified road crown, then the BIM lofting robot is used to detect the loose paving thickness of the middle surface layer and the surface elevation of the middle surface layer filler at each control point, the data is imported into the BIM model, whether the elevation of each control point meets the design requirements is analyzed, if necessary, manual reduction or supplement of the filler is performed, and after the elevation of each control point meets the design requirements, rolling is performed. The compaction degree is detected, and after the compaction degree meets the design requirements, the upper surface layer construction is completed;

[0104] The BIM lofting robot is used to measure the actual elevation of each control point on the surface of the upper surface layer, and the data is imported into the BIM model. Whether the actual elevation of each control point meets the design requirements is analyzed, and the smoothness of the surface of the upper surface layer is analyzed according to the elevation. If the design requirements are not met, manual increase or decrease of the upper surface layer filler is performed as necessary, and tamping is performed.

[0105] S8, marking construction

[0106] The BIM lofting robot is used for lofting traffic marking on the surface of the surface layer according to the BIM model. When lofting traffic marking, the intelligent BIM lofting robot capable of walking is used. After the BIM model is input into the intelligent BIM lofting robot, the lofting robot can automatically walk along the set route for lofting. Finally, the traffic marking construction equipment is used for marking and constructing traffic marking on the surface of the surface layer.

[0107] Thus, the construction of the road intersection is completed.

[0108] It should be noted that the above embodiments are illustrative of the technical solutions of the present application but not limiting, equivalent replacements of the ordinary skilled in the art or other modifications made according to the prior art should be included in the scope of the rights claimed by the present application as long as they do not exceed the ideas and scope of the technical solutions of the present application.

Claims

1. A road intersection construction method based on a BIM model, characterized by: The construction steps include the following: S1, establishing a BIM model constructing a road intersection BIM model according to a road intersection vertical design drawing; S2, correcting the BIM model correcting the road intersection straight and curved line transition unevenness, local elevation transition unevenness, and road transverse and longitudinal slope conflicts in the BIM model; S3, subgrade construction S31, positioning and setting out determining road intersection site setting out points and control points from the corrected BIM model, setting out at the road intersection by using an intelligent measurement and setting out device to form a road intersection construction area; S32, excavating a subgrade trench excavating soil and stone in the construction area and performing rolling and tamping to form a soil base layer; S33, subgrade trench backfilling treatment spreading and paving backfilling soil in the subgrade trench, finishing the road arch, and performing rolling and tamping to form a subgrade; S4, cushion layer construction S41, measuring actual elevations of each control point on the subgrade surface by using an intelligent measurement and setting out device, importing the data into the BIM model, adjusting the BIM model according to the actual elevations of each control point on the subgrade surface, obtaining the amount of cushion layer filler and the stacking position of each vehicle of the cushion layer filler from the adjusted BIM model; S42, transporting and stacking the cushion layer filler, and spreading, rolling and tamping the stacked cushion layer filler to form a cushion layer; S5, base layer construction S51, measuring actual elevations of each control point on the cushion layer surface by using an intelligent measurement and setting out device, importing the measurement data into the BIM model, adjusting the BIM model according to the actual elevations of each control point on the cushion layer surface, obtaining the amount of base layer filler from the adjusted BIM model, and determining setting out points from the adjusted BIM model; S52, setting out on the subgrade surface by using an intelligent measurement and setting out device; S53, spreading the base layer filler on the subgrade surface and performing rolling and tamping; S54, detecting the compaction degree, and completing the base layer construction after the compaction degree meets the design requirements; S6, curb construction S61, measuring actual elevations of each control point on the base layer surface by using an intelligent measurement and setting out device, importing the measurement data into the BIM model, adjusting the BIM model according to the measurement data, and obtaining the amount of side curb stone and curb stone, the control points and setting out points of the side curb stone and curb stone from the adjusted BIM model; S62, setting out on the base layer surface by using an intelligent measurement and setting out device to form a mounting area of the side curb stone and curb stone; S63, excavating a trench on the base layer surface, leveling the trench bottom, manually installing the side curb stone and curb stone in the trench, and forming a curb; S7, surface layer construction S71, determining surface layer setting out points from the adjusted BIM model in step S61, setting out on the base layer surface by using an intelligent measurement and setting out device, and obtaining the amount of surface layer filler from the adjusted BIM model, S72, uniformly spreading the surface layer filler and performing rolling and tamping, S73, detecting the compaction degree, and completing the surface layer construction after the compaction degree meets the design requirements; S8, marking construction performing traffic marking setting out on the surface layer surface according to the BIM model by using an intelligent measurement and setting out device, and finally performing traffic marking line construction on the surface layer surface by using a traffic marking construction device; Thus, the construction of the road intersection is completed.

2. The BIM model-based road intersection construction method of claim 1, characterized by: The step S33, when the roadbed groove backfilling treatment is performed, first, the intelligent surveying and setting-out equipment is used to re-survey the elevations of the control points on the surface of the soil base layer, and the data is imported into the BIM model, the roadbed groove backfilling soil quantity and the backfilling soil stacking position of each vehicle are obtained from the BIM model; Then, the backfilling soil is stacked at the corresponding position, the backfilling soil is spread by the grader and the road arch is trimmed; Then, the intelligent surveying and setting-out equipment is used to measure the elevations of the control points on the surface of the loose backfilling soil, and the elevation data is imported into the BIM model, the BIM model analyzes whether the elevations of the control points meet the design requirements, and gives the data of material reduction or supplement, and the material is manually reduced or supplemented according to the data; After the elevations of the control points on the surface of the backfilling soil all meet the design requirements, the backfilling soil is mechanically rolled and compacted, and after the compaction degree meets the design requirements, the roadbed construction is completed.

3. The BIM model-based road intersection construction method of claim 1, characterized by: The step S4, when the cushion layer is constructed, the cushion layer is constructed by the layered construction, the elevations of the control points of each layer of the cushion layer, the quantity of the filler of each layer of the cushion layer and the stacking position of the filler of each layer of the cushion layer are obtained from the adjusted BIM model; The filler of each layer of the cushion layer is spread from bottom to top, after the filler of each layer of the cushion layer is spread, the elevations of the control points on the surface of the loose filler of each layer of the cushion layer are measured by the intelligent surveying and setting-out equipment, and the elevation data is imported into the BIM model, the BIM model analyzes whether the elevations of the control points meet the design requirements, and gives the data of material reduction or supplement, and the material is manually reduced or supplemented according to the data, after the elevations of the control points on the surface of the layer meet the design requirements, the next layer of the filler of the cushion layer is spread after the mechanical rolling and compaction.

4. The BIM model-based road intersection construction method of claim 1, characterized by: The step S53, when the base layer filler is spread, the base layer filler is uniformly spread on the roadbed by the transport vehicle assisted spreader, the spread surface is required to be flat and has a specified road arch; then, the base layer loose thickness of each detection point and the base layer surface elevation are detected by the intelligent surveying and setting-out equipment, and the data is imported into the BIM model, whether the elevations of the control points meet the design requirements is analyzed, and the material is manually reduced or supplemented if necessary, after the elevations of the control points meet the design requirements, the rolling is performed.

5. The BIM model-based road intersection construction method of claim 4, characterized in that: The base layer filler is the mixture of cement, lime, gravel, sand and water, and the particle size of the gravel is less than or equal to 10 mm.

6. The BIM model-based road intersection construction method of claim 1, characterized by: The step S6, when the curb is constructed, for the curb construction of the straight section of the road intersection, the control points can be arranged at the two ends and / or the middle of the straight section, the elevations and installation positions of the side flat stones and the curb stones of the straight section are controlled by the control point line pulling method; for the side flat stone and curb stone construction of the curved section of the road intersection, the elevations and installation positions of each side flat stone and curb stone are monitored by the intelligent surveying and setting-out equipment.

7. The BIM model-based road intersection construction method of claim 1, characterized by: The step S7, when the surface layer is constructed, the surface layer is one layer or multiple layers, when the surface layer is multiple layers, the layered construction from bottom to top is adopted, after the filler of one layer of the surface layer is spread and rolled, the construction of the next layer of the surface layer is performed.

8. The BIM model-based road intersection construction method of claim 7, characterized in that: The paving layer filler is uniformly paved on the base layer by the transport vehicle auxiliary paver, the paving surface is required to be flat and has a specified road crown, then the intelligent measuring and lofting equipment is used to detect the layer loose paving thickness of each control point and the layer filler surface elevation, the data is introduced into the BIM model, whether the elevation of each control point meets the design requirement is analyzed, if necessary, the material is manually reduced or supplemented, and then the rolling is carried out after the elevation of each control point meets the design requirement.

9. The BIM model-based road intersection construction method according to any one of claims 1 to 8, characterized in that: The intelligent measuring and lofting equipment is a BIM lofting robot.

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