A construction site layout optimization method and system based on BIM+GIS

Abstract

The present invention discloses a method and system for optimizing the layout of a construction site based on BIM+GIS, and belongs to the field of information technology of construction engineering. The method comprises: firstly constructing a BIM model family library of various facilities required for the construction site, and a GIS model of the construction site and the surrounding environment, and then integrating the two; based on the integrated model, using the SLP method to establish a multi-objective function for optimizing the layout of the construction site, with the minimum weighted value of the sum of the floor space of various facilities and the sum of the logistics costs between various facilities as the goal, combined with the constraint conditions, solving the optimal solution of the multi-objective function for optimizing the layout of the construction site. The present invention analyzes and optimizes the rationality and controllability of the layout of various temporary facilities at the construction site, reduces the construction transportation cost and the land area of ​​temporary facilities, makes various adjustments to the layout of the construction site, and proposes a feasible optimization layout plan, which can provide reference and reference for the optimization of similar engineering site layout.

Description

Technical Field

[0001] The present invention belongs to the field of construction engineering informatization, and more specifically, relates to a construction site layout optimization method and system based on BIM+GIS. Background Art

[0002] The layout of the construction site is an important part of the project construction preparation work. It is necessary to combine the consideration of green space restrictions, cultivated land restrictions, planning red lines, safety requirements, reference indicators for various types of temporary facilities, and logistics intensity and logistics costs between temporary facilities. Only in this way can the construction site layout be effectively carried out to create conditions and foundation for subsequent construction management, cost control, and safety management.

[0003] At present, the site layout design in the actual implementation of the project is mostly determined by the on-site technical person in charge based on the CAD drawings combined with his own experience and the actual situation on site, and the CAD site layout drawings are drawn. On this basis, some site layout software builds BIM models according to CAD drawings, establishes information construction libraries of various temporary facilities and construction facilities, and further improves the visualization level and spatial constraints of site layout planning, but still relies on the experience of technicians to build and place. The traditional method of site layout based on the experience of technicians and the actual situation on site is very subjective and unstable, and the factors affecting the cost such as logistics intensity and logistics cost between various temporary facilities are rarely considered or difficult to quantitatively analyze. In addition, with the advancement of construction progress, the land restrictions on construction site layout, the use requirements of various materials, and the use requirements of various construction equipment will change greatly. At this stage, the static construction site layout method cannot adapt to the needs of this dynamic optimization. Summary of the invention

[0004] In view of the defects and improvement needs of the prior art, the present invention provides a construction site layout optimization method and system based on BIM+GIS, which aims to solve the problem that the traditional site layout method is very subjective and the static construction site layout method cannot adapt to dynamic optimization needs.

[0005] To achieve the above object, according to one aspect of the present invention, a construction site layout optimization method based on BIM+GIS is provided, comprising:

[0006] S1, constructing a BIM model family library of various facilities required for the construction site, wherein the various facilities include temporary facilities and construction facilities;

[0007] S2, scanning and building a GIS model of the construction site and surrounding environment;

[0008] S3, integrates the BIM models of various facilities in S1 with the GIS model in S2;

[0009] S4, based on the fused model, the SLP method is used to establish a multi-objective function for optimizing the layout of the construction site, with the goal of minimizing the weighted value of the total area of ​​the various facilities and the total logistics costs between the various facilities, combined with the constraints, to solve the optimal solution of the multi-objective function for optimizing the layout of the construction site.

[0010] Furthermore, in S1, the temporary facilities include temporary houses, temporary roads, temporary water supply and temporary power supply facilities, and the construction facilities include engineering vehicles, construction machinery and tower cranes.

[0011] Furthermore, the S2 includes:

[0012] A real-scene model of the construction site and its surrounding environment is established by using an oblique photography method, and an operable GIS model is obtained after the real-scene model is subjected to individual processing.

[0013] Furthermore, in S3, before integrating the BIM models of various facilities in S1 with the GIS model in S2, the following steps are also included:

[0014] The differences between IFC components and CityGML components are analyzed, and the mapping relationship between BIM models and GIS models is constructed to unify the data models of the BIM models of various facilities in S1 and the GIS models in S2. The IFC components and CityGML components are the data models of BIM and GIS, respectively.

[0015] Furthermore, in S4, the constraints include green space restrictions, cultivated land restrictions, planning red lines, safety requirements, reference indicators for land use of various types of facilities, and logistics intensity and logistics costs between various types of facilities.

[0016] Furthermore, after S4, the step further includes:

[0017] A construction simulation is performed according to the optimal solution. When a construction efficiency threshold and a cost threshold are met, the optimal solution is used to arrange the construction site. Otherwise, the construction site arrangement optimization multi-objective function is re-optimized.

[0018] According to one aspect of the present invention, a construction site layout optimization system based on BIM+GIS is provided, comprising:

[0019] A BIM construction module is used to construct a BIM model family library of various facilities required for the construction site, wherein the various facilities include temporary facilities and construction facilities;

[0020] A GIS construction module, used to scan and construct a GIS model of the construction site and surrounding environment;

[0021] A fusion module, used for fusing the BIM model of the various facilities with the GIS model;

[0022] The optimization module is used to establish a multi-objective function for optimizing the layout of the construction site based on the fused model using the SLP method, with the goal of minimizing the weighted value of the sum of the floor areas of the various facilities and the sum of the logistics costs between the various facilities, and combined with the constraints to solve the optimal solution of the multi-objective function for optimizing the layout of the construction site.

[0023] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects:

[0024] (1) The present invention first constructs a BIM model family library of various facilities required for the construction site, as well as a GIS model of the construction site and the surrounding environment, and then integrates the two; based on the integrated model, the SLP method is used to establish a multi-objective function for optimizing the layout of the construction site, with the minimum weighted value of the sum of the floor space of various facilities and the sum of the logistics costs between various facilities as the goal, combined with the constraints, to solve the optimal solution of the multi-objective function for optimizing the layout of the construction site. The present invention analyzes and optimizes various environments suitable for the construction, work and life of workers, improves the rationality and controllability of the project, makes various adjustments to the layout of the construction site, and proposes a feasible optimization layout plan, which can provide reference and reference for the optimization of similar engineering layouts.

[0025] (2) The BIM model can well display facility information. The powerful storage function can save the different layout conditions of each construction stage on the mobile terminal, and add comparison effects to clearly display the layout effects of different stages and the application of optimization results. The site BIM model and GIS environment are seamlessly connected in the software, which can truly restore the surrounding scenes of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A flowchart of a construction site layout optimization method based on BIM+GIS provided in an embodiment of the present invention;

[0027] Figure 2 A block diagram of a construction site layout optimization system based on BIM+GIS provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] In the present invention, the terms "first", "second", etc. (if any) in the present invention and the accompanying drawings are used to distinguish similar objects but not necessarily to describe a specific order or sequence.

[0030] Figure 1 Flow chart of the construction site layout optimization method based on BIM+GIS provided by the embodiment of the present invention. Figure 1 , the construction site layout optimization method based on BIM+GIS in this embodiment is described in detail, and the method includes operations S1 to S4.

[0031] Operation S1, constructing a BIM model family library of various facilities required for the construction site, wherein the various facilities include temporary facilities and construction facilities.

[0032] In this embodiment, high-precision BIM models of various facilities are established: including temporary facilities such as temporary housing, temporary roads, temporary water supply, temporary power supply, and construction facilities such as engineering vehicles, construction machinery, and tower cranes. For common facilities, a family library is established, and non-common facilities are modeled for each specific project.

[0033] Operation S2 is to scan and construct a GIS model of the construction site and its surrounding environment.

[0034] In this embodiment, a GIS model of the terrain, topography and surrounding conditions of the entire construction site is scanned: a real-scene model of the surrounding environment is established by oblique photography, and after individual processing, an operational GIS model is obtained.

[0035] Operation S3 integrates the BIM models of various facilities in S1 with the GIS model in S2.

[0036] In this embodiment, the facility model is extracted from the BIM model family library of S1 according to the project needs, and is integrated with the GIS model in S2, and then constraints are set for the construction site layout in the integrated model. IFC and CityGML are the most common data models for BIM and GIS, respectively. By analyzing the differences between IFC components and CityGML components, a mapping relationship between the two is constructed to achieve the unification of the data model, and then the two parameterized models are integrated. After the BIM model is imported into the GIS model, the scope of the construction site layout is determined: the constraints that need to be set include: green space restrictions, cultivated land restrictions, planning red lines, safety requirements, various types of temporary land use reference indicators, and logistics intensity and logistics costs between temporary facilities.

[0037] Operation S4, based on the fused model, uses the SLP method to establish a multi-objective function for optimizing the layout of the construction site, takes the minimum weighted value of the total area of ​​the various facilities and the total logistics costs between the various facilities as the goal, and combines the constraints to solve the optimal solution of the multi-objective function for optimizing the layout of the construction site.

[0038] In this embodiment, the SLP method is used to establish a multi-objective function for site layout optimization, and a genetic algorithm is used to optimize and solve the constructed multi-objective function: according to the idea of ​​the SLP method, the logistics relationship and non-logistics relationship between each area and each temporary facility of the construction site are analyzed to determine the relative position relationship between each area and the temporary facility. Establish a multi-objective function according to the optimization goal:

[0039] C=min∑δ ij d ij c ij

[0040] S=min∑θ i s i

[0041] In the optimization model, the standard specifications of site layout and land use restrictions are used as constraints for the above two functions.

[0042] Among them, C – the logistics cost of all resources between facilities on the construction site;

[0043] S——the total area occupied by all facilities on the construction site;

[0044] δ ij ——The weight of the importance of logistics, personnel flow, and equipment flow between two facilities i and j;

[0045] d ij ——the distance between two facilities i and j;

[0046] c ij ——Logistics cost between two facilities i and j;

[0047] θ i ——Land use weight of facility i;

[0048] s i ——Land area of ​​facility i.

[0049] Using genetic algorithms, through the processes of selection, crossover, mutation, etc. of independent variables, after multiple rounds of selection, the optimal solution to the problem is generated.

[0050] Furthermore, after S4, a construction simulation is performed based on the optimal solution obtained after optimization, and temporary facilities are gradually arranged according to the construction progress. When the construction efficiency and cost values ​​are optimal, the arrangement plan is allowed to pass. If it does not meet the optimal situation, it is re-optimized.

[0051] Figure 2 A block diagram of a construction site layout optimization system based on BIM+GIS provided by an embodiment of the present invention. Figure 2 The BIM+GIS-based construction site layout optimization system 200 includes a BIM construction module 210, a GIS construction module 220, a fusion module 230 and an optimization module 240.

[0052] The BIM construction module 210, for example, performs operation S1 to construct a BIM model family library of various facilities required for the construction site, wherein the various facilities include temporary facilities and construction facilities.

[0053] The GIS construction module 220, for example, performs operation S2 to scan and construct a GIS model of the construction site and its surrounding environment.

[0054] The fusion module 230, for example, performs operation S3 to fuse the BIM models of the various types of facilities with the GIS models.

[0055] The optimization module 240, for example, executes operation S4, which is used to establish a multi-objective function for optimizing the layout of the construction site based on the fused model using the SLP method, with the goal of minimizing the weighted value of the total area occupied by each type of facility and the total logistics cost between each type of facility, and combining the constraints to solve the optimal solution of the multi-objective function for optimizing the layout of the construction site.

[0056] The construction site layout optimization system 200 based on BIM+GIS is used to perform the above Figure 1 The construction site layout optimization method based on BIM+GIS in the embodiment shown. For details not covered in this embodiment, please refer to the aforementioned Figure 1 The construction site layout optimization method based on BIM+GIS in the illustrated embodiment will not be described in detail here.

[0057] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction site layout optimization method based on BIM+GIS, characterized in that: include: S1, constructing a BIM model family library of various facilities required for the construction site, wherein the various facilities include temporary facilities and construction facilities; S2, scanning and building a GIS model of the construction site and surrounding environment; S3, integrates the BIM models of various facilities in S1 with the GIS model in S2; S4, based on the fused model, using the SLP method to establish a multi-objective function for optimizing the layout of the construction site, taking the minimum weighted value of the sum of the floor areas of the various facilities and the sum of the logistics costs between the various facilities as the goal, and combining the constraints to solve the optimal solution of the multi-objective function for optimizing the layout of the construction site; Among them, the optimization of multi-objective functions includes: C=min∑δ ij d ij c ij S=min∑θ i s i C is the logistics cost of all resources between the facilities on the construction site; S is the total area occupied by all facilities on the construction site; δ ij is the weight of the importance of logistics, personnel flow, and equipment flow between two facilities i and j; d ij is the distance between two facilities i and j; c ij is the logistics cost between two facilities i and j; θ i is the land use weight of facility i; s i is the land area of ​​facility i; Constraints include: green space restrictions, cultivated land restrictions, planning red lines, safety requirements, reference indicators for land use of various types of facilities, and logistics intensity and logistics costs between various types of facilities.

2. The construction site layout optimization method based on BIM+GIS as claimed in claim 1, characterized in that: In S1, the temporary facilities include temporary houses, temporary roads, temporary water supply and temporary power supply facilities, and the construction facilities include engineering vehicles, construction machinery and tower cranes.

3. The construction site layout optimization method based on BIM+GIS as claimed in claim 1, characterized in that: The S2 includes: A real-scene model of the construction site and its surrounding environment is established by using an oblique photography method, and an operable GIS model is obtained after the real-scene model is subjected to individual processing.

4. The construction site layout optimization method based on BIM+GIS as claimed in claim 1, characterized in that: In S3, before integrating the BIM models of various facilities in S1 with the GIS model in S2, the following steps are also included: The differences between IFC components and CityGML components are analyzed, and the mapping relationship between BIM models and GIS models is constructed to unify the data models of the BIM models of various facilities in S1 and the GIS models in S2. The IFC components and CityGML components are the data models of BIM and GIS, respectively.

5. The method for optimizing construction site layout based on BIM+GIS according to any one of claims 1 to 4, characterized in that: After S4, it also includes: A construction simulation is performed according to the optimal solution. When a construction efficiency threshold and a cost threshold are met, the optimal solution is used to arrange the construction site. Otherwise, the construction site arrangement optimization multi-objective function is re-optimized.

6. A construction site layout optimization system based on BIM+GIS, characterized in that: include: A BIM construction module is used to construct a BIM model family library of various facilities required for the construction site, wherein the various facilities include temporary facilities and construction facilities; A GIS construction module, used to scan and construct a GIS model of the construction site and surrounding environment; A fusion module, used for fusing the BIM model of the various facilities with the GIS model; An optimization module is used to establish a multi-objective function for optimizing the layout of the construction site based on the fused model using the SLP method, taking the minimum weighted value of the sum of the floor areas of the various facilities and the sum of the logistics costs between the various facilities as the goal, and combining the constraints to solve the optimal solution of the multi-objective function for optimizing the layout of the construction site; Among them, the optimization of multi-objective functions includes: C=minΣδ ij d ij c ij S=minΣθ i s i C is the logistics cost of all resources between the facilities on the construction site; S is the total area occupied by all facilities on the construction site; δ ij is the weight of the importance of logistics, personnel flow, and equipment flow between two facilities i and j; d ij is the distance between two facilities i and j; c ij is the logistics cost between two facilities i and j; θ i is the land use weight of facility i; s i is the land area of ​​facility i; Constraints include: green space restrictions, cultivated land restrictions, planning red lines, safety requirements, reference indicators for land use of various types of facilities, and logistics intensity and logistics costs between various types of facilities.

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