Construction project progress management method and system based on BIM

Abstract

The invention relates to the technical field of data processing for management, in particular to a BIM-based construction project progress management method and system, and the method comprises the steps: collecting data in a current construction plan, obtaining a change probability according to the number of pipelines pre-buried by a construction party, and the calibers and lengths of the pipelines, the method comprises the following steps: recording a combination formed by any one pre-buried pipeline of an advanced site construction party and a post-advanced site construction party as a contrast combination, and obtaining a construction space conflict factor and a construction progress difference factor of each contrast combination according to construction material and site data and data differences in each contrast combination; and the construction conflict probability is obtained by combining the construction starting time and the construction ending time of each construction party, so that the optimal construction plan is obtained. According to the method, the optimal construction plan is obtained through the self-adaptive pipeline sequence and the number of people required for pipeline construction, the cooperative construction efficiency of multiple construction parties is greatly improved, and the construction progress is optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of data processing for management, and in particular to a construction project progress management method and system based on BIM. Background Art

[0002] Cleanroom construction is a room designed for a specific purpose, whose internal environment needs to be kept highly clean and precisely controlled to meet strict hygiene, safety and quality standards. Such rooms are usually used in medical equipment manufacturing, pharmaceuticals, biotechnology, semiconductor manufacturing and other fields. Cleanroom construction has high requirements, and BIM building information modeling tools are currently used to assist in management and coordination of construction progress. It is a comprehensive digital modeling method that aims to effectively plan, design, build and manage building and infrastructure projects and promote multi-party collaboration.

[0003] In the clean room construction progress management, the air handling system and ventilation system are crucial to maintaining the high cleanliness and environmental control of the clean room. They are also the two most difficult construction units to coordinate during the construction process. Errors in any step of design, material, equipment procurement, construction planning, and management may lead to conflicts in the construction process, resulting in delayed construction progress, reduced cleanliness of the clean room, and increased difficulty in later maintenance. Therefore, how to reasonably coordinate and schedule the construction progress of the two construction units is one of the problems that need to be solved urgently. Summary of the invention

[0004] The present invention provides a construction project progress management method and system based on BIM to solve the existing problems.

[0005] The BIM-based construction project progress management method and system of the present invention adopts the following technical solutions: An embodiment of the present invention provides a construction project progress management method based on BIM, the method comprising the following steps: Collect the number of pre-buried pipelines of each construction party in the current construction plan, the start and end time of construction of each construction party, the diameter and length of each pipeline, the sequence of pipelines pre-buried by each construction party, construction materials and site data; the construction parties include the first construction party and the later construction party; the first construction party is recorded as a; the later construction party is recorded as b; The probability of change is obtained based on the number of pipelines pre-buried by the construction party, the diameter and length of the pipelines; The combination of any one of the pre-buried pipes of a and b is recorded as a control combination; according to the construction materials and site data, and the data differences within each control combination, the construction space conflict factor and the construction progress difference factor of each control combination are obtained; The construction conflict probability is obtained based on the construction space conflict factors and construction progress difference factors of all control combinations, the construction start and end time of the construction party, and the change probability; The optimal construction plan is obtained based on the probability of construction conflict and the sequence of pipelines pre-buried by the construction party.

[0006] Furthermore, the change probability is obtained according to the number of pipelines pre-buried by the construction party, the diameter and length of the pipelines, and the specific steps include the following: The average of the products of the diameters and lengths of all pre-buried pipes in a is recorded as the average capacity of the pre-buried pipes in the construction plan of a; Subtract one from the number of pre-buried pipes in a, and record it as the number of elbows in a; The average capacity of the pre-buried pipes in the construction plan of a is divided by the number of bends in a, which is recorded as the air circulation efficiency of the pre-buried pipe path of a; The average of the products of the diameters and lengths of all pre-buried pipes in b is recorded as the average capacity of the pre-buried pipes in the construction plan of b; Subtract one from the number of pre-buried pipes in b, and record it as the number of elbows in b; Divide the average capacity of the pre-buried pipes in the construction plan of b by the number of bends in b, and record it as the air circulation efficiency of the pre-buried pipe path of b; The normalized value of the difference in air circulation efficiency between the pre-buried duct paths a and b is recorded as the change probability.

[0007] Furthermore, the construction space conflict factor and the construction progress difference factor of each comparison combination are obtained according to the construction materials and site data and the data difference in each comparison combination, and the specific steps include the following: Construction material and site data include the distance between pipelines, the number of people required for the construction of each pipeline, the area of ​​the clean room construction interface, the availability of construction materials for each pipeline, the amount of excavation and filling for each pipeline, and the average years of experience of the construction personnel for each pipeline; Any control combination is recorded as a target combination; the target combination includes the pth pipeline pre-buried by a and the qth pipeline pre-buried by b; According to the distance between pipelines in the target combination, the number of people required for pipeline construction, and the area of ​​the clean room construction interface, the construction space conflict factor of the target combination is obtained; According to the availability of construction materials for the pipeline, the amount of excavation and filling of the pipeline, and the average years of experience of the pipeline construction workers in the target combination, the construction progress difference factor of the target combination is obtained.

[0008] Furthermore, the construction space conflict factor of the target combination is obtained according to the distance between the pipelines in the target combination, the number of people required for the construction of the pipelines, and the area of ​​the clean room construction interface, and the specific steps include the following: Obtain the distance between the pth pre-buried pipe in a and the qth pre-buried pipe in b, then obtain the sum of the number of people required for the construction of the pth pre-buried pipe in a and the number of people required for the construction of the qth pre-buried pipe in b, calculate the product of the sum and the preset single-person activity area, then calculate the ratio of the area of ​​the clean room construction interface to the product, input the ratio into a logarithmic function with base 2, obtain the output value, and record the product of the output value and the distance as the construction space conflict factor of the target combination.

[0009] Furthermore, the construction progress difference factor of the target combination is obtained according to the availability of construction materials of the pipeline in the target combination, the excavation and filling volume of the pipeline, and the average years of experience of the construction personnel of the pipeline, and the specific steps include the following: The difference between the construction material availability rate of the pth pipeline pre-buried in a and the construction material availability rate of the qth pipeline pre-buried in b is taken as the first difference; Calculate the ratio of the excavation and filling volume of the p-th pipeline pre-buried in a to the average years of service of the construction personnel of the p-th pipeline pre-buried in a, and record it as the first ratio; Calculate the ratio of the excavation and filling volume of the qth pipeline pre-buried in b to the average years of experience of the construction workers of the qth pipeline pre-buried in b, and record it as the second ratio; The difference between the first ratio and the second ratio is recorded as the second difference; The Euclidean norm of the vector formed by the first difference and the second difference is recorded as the construction progress difference factor of the target combination.

[0010] Furthermore, the construction conflict probability is obtained according to the construction space conflict factor and the construction progress difference factor of all control combinations, the construction start and end time of the construction party, and the change probability, and the specific steps include the following: The mean of the product of the construction space conflict factor and the construction progress difference factor of all control combinations is recorded as the average impact value of all control combinations on the construction progress; According to the difference between the construction start and end time of a and b, the degree of construction time conflict between a and b is obtained; The product of the inverse proportional value of the change probability, the average impact value of all control combinations on the construction progress, and the construction time conflict degree of a and b is calculated, and the normalized value of the inverse proportionality of the product is recorded as the construction conflict probability.

[0011] Furthermore, the step of obtaining the degree of conflict between the construction time of a and b according to the difference between the construction start and end time of a and b includes the following specific steps: The difference between the construction start time of a and b is recorded as the start time difference; The difference between the construction start time and the construction end time of a is recorded as the construction duration of a; The difference between the construction start time and the construction end time of b is recorded as the construction duration of b; The product of the construction durations of a and b is divided by the start time difference, which is recorded as the degree of construction time conflict between a and b.

[0012] Furthermore, the optimal construction plan is obtained according to the construction conflict probability and the sequence of the pipelines pre-buried by the construction party, and the specific steps include the following: In the current construction plan, the sequence of pipelines pre-buried by each construction party is re-arranged, and the number of people required for the construction of each pipeline is readjusted to obtain a number of different new construction plans and a sequence of new pipelines pre-buried by each construction party in each new construction plan; Record any new construction plan as the target construction plan; In the target construction planning, the sequence of the new pipelines pre-buried in a is recorded as the pre-target sequence; the sequence of the new pipelines pre-buried in b is recorded as the post-target sequence; According to the construction conflict probability of the target construction plan, the difference between the pre-buried pipeline sequence of a and b and the previous target sequence and the subsequent target sequence, the quality of the target construction plan is obtained; the construction conflict probability of the target construction plan is obtained in the same way as the construction conflict probability; The minimum value among the advantages and disadvantages of all new construction plans is counted, and the new construction plan corresponding to the minimum value is recorded as the optimal construction plan.

[0013] Furthermore, the method of obtaining the quality of the target construction plan according to the construction conflict probability of the target construction plan and the differences between the pre-buried pipeline sequence of a and b and the previous target sequence and the subsequent target sequence respectively includes the following specific steps: Obtain the absolute value of the difference between the ordinal value of the p-th pipeline pre-buried by a in the pipeline sequence pre-buried by a and the ordinal value of the p-th pipeline pre-buried by a in the previous target sequence, and record it as the first difference value; Obtain the absolute value of the difference between the ordinal value of the qth pipeline pre-buried by b in the pipeline sequence pre-buried by b and the ordinal value of the qth pipeline pre-buried by b in the post-target sequence, and record it as the second difference value; The product of the first difference value and the second difference value is recorded as the ordinal difference value between the pth pipeline pre-buried in a and the qth pipeline pre-buried in b; The normalized value of the mean of the ordinal difference values ​​between all the pre-buried pipelines in a and all the pre-buried pipelines in b is obtained, and the sum of the normalized value of the mean and the construction conflict probability of the target construction plan is recorded as the quality of the target construction plan.

[0014] The present invention also proposes a BIM-based construction project progress management system, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program stored in the memory to implement the steps of the aforementioned BIM-based construction project progress management method.

[0015] The beneficial effects of the technical solution of the present invention are: In an embodiment of the present invention, data in the current construction plan is collected, and the change probability is obtained according to the number of pipelines pre-buried by the construction party, the caliber and length of the pipeline. The combination of any one pipeline pre-buried by the advanced construction party and the late construction party is recorded as a control combination, and the construction space conflict factor and the construction progress difference factor of each control combination are obtained according to the construction materials and site data and the data difference in each control combination. Combined with the construction start and end time and the change probability of each construction party, the construction conflict probability is obtained, which is used to solve the construction process of the air treatment system and the ventilation system in the limited space of the clean room. There are a large number of similar construction steps and processes, and the problems of overlapping and interaction of construction interfaces are most likely to occur. Finally, according to the construction conflict probability and the sequence sequence of the pipelines pre-buried by each construction party, the optimal construction plan is obtained. Therefore, the present invention adapts to the sequence sequence of pipelines and the number of people required for the construction of pipelines to obtain the optimal construction plan, which can prevent the overlap of the working interface and the obstruction of the working space during the construction of both parties, and avoids the influence of adjusting the construction sequence on the construction quality, greatly improves the collaborative construction efficiency of multiple construction parties, and optimizes the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The present invention is a flowchart of the steps of the construction project progress management method based on BIM. DETAILED DESCRIPTION

[0018] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the BIM-based construction project progress management method and system proposed by the present invention, its specific implementation method, structure, features and effects, in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0019] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0020] The specific scheme of the construction project progress management method and system based on BIM provided by the present invention is described in detail below with reference to the accompanying drawings.

[0021] See also Figure 1 , which shows a flowchart of a construction project progress management method based on BIM provided by an embodiment of the present invention, the method comprising the following steps: Step S001: Collect the number of pre-buried pipes of each construction party in the current construction plan, the start and end time of construction of each construction party, the diameter and length of each pipe, the sequence of pre-buried pipes of each construction party, construction materials and site data; the construction parties include the first construction party and the later construction party; the first construction party is recorded as a; the later construction party is recorded as b.

[0022] Pre-construction preparation: Construction conflict issues first include the interaction and cooperation between multiple construction units, such as equipment installation location, shared wire pipes, human resources, construction time, etc. It is necessary to coordinate the rationality of the design drawings in advance, and use BIM to split the CAD construction drawings of the two construction units of the air handling system and the ventilation system. Through the BIM model, the location, air ducts, terminal equipment and other components of the air handling system, as well as components such as air ducts, exhaust fans, heaters, coolers, etc. in the ventilation system can be clearly decomposed. These components are sub-units of the construction unit, and the specific construction data of the sub-units, such as specifications, dimensions, connection methods, etc., are presented. Combined with the overall construction schedule, the construction schedule of each sub-unit after the air handling system and the ventilation system are split, and the interaction and cooperation issues to be coordinated between the various sub-units are proposed. Use BIM to analyze common collision problems to be coordinated, generate and provide solutions and coordination data, and send them to each construction for discussion, feedback, and adjustment. Avoid conflicts by coordinating construction interaction issues in advance.

[0023] It should be noted that BIM refers to Building Information Model, and CAD construction drawings refer to construction drawings made using computer-aided design software.

[0024] However, no matter how thorough the preparations are in the early stage of construction, certain conflicts will inevitably arise during the actual construction process, because there are a large number of similar construction steps and processes in the construction process of the air handling system and the ventilation system, which are most likely to cause overlapping and interaction of construction interfaces, slowing down the construction progress, especially in the pipeline pre-embedded link, where the ventilation duct and the air handling duct may need to cross the same space, so the construction progress of one party will directly affect or even disrupt the construction progress of the other construction unit. Therefore, the embodiment optimizes the construction schedule in combination with the entry registration information of both parties.

[0025] The number of pre-buried pipes of each construction party in the current construction plan, the start and end time of construction of each construction party, the diameter and length of each pipe, the sequence of pre-buried pipes of each construction party, construction materials and site data are collected. The construction parties include the advanced construction party a and the late construction party b in the current construction plan.

[0026] It should be noted that: this embodiment divides the pre-buried pipeline path of each construction party into multiple single-straight-line pipelines according to the number of bends and turns. Each pipeline in the data collected in this embodiment represents each single-straight-line pipeline, and the pipeline in the subsequent analysis also represents the single-straight-line pipeline. When there are multiple types of pipelines in a single-straight-line pipeline, that is, there are multiple pipeline calibers in the single-straight-line pipeline, let the average of the multiple pipeline calibers represent the caliber of the pipeline, that is, calculate the product of each pipeline caliber and length, and then calculate the sum of the products corresponding to all the pipelines, and finally divide the sum by the length of the single-straight-line pipeline, which is the caliber of the pipeline. The pipeline sequence is the order of a single-straight-line pipeline under a single-straight-line pipeline turn. The number of pre-buried pipelines by each construction party represents the number of pipelines that each construction party needs to pre-buried in the current construction plan.

[0027] Step S002: Obtain the change probability according to the number of pipelines pre-buried by the construction party, the diameter and length of the pipelines.

[0028] The air duct and pipe layout of the air handling system and ventilation system in the clean room need to be coordinated with each other to ensure proper air flow and distribution. This includes ensuring the introduction of fresh air and the exhaust of exhaust air. Although there is no limit on the air filtration speed of the air handling system, the higher the standard of the clean room, the higher the demand for maintaining long-term cleanliness and ventilation. Therefore, considering the upper limit of the application of the clean room, the average air circulation efficiency of the pre-buried pipeline lines of the two systems needs to be as close as possible, because in this way the air handling system can promptly and effectively handle the large amount of fresh air introduced by the ventilation system. This embodiment estimates the probability of possible design changes through the analysis of the design drawings.

[0029] It can be seen that the calculation process of the change probability K is: The first construction party and the last construction party are denoted as a and b respectively; Obtain the number of pre-buried pipes a and b, respectively, and the number of bends; the number of bends is the number of pre-buried pipes minus one.

[0030] Obtain the diameter and length of each pre-buried pipe in a, and the diameter and length of each pre-buried pipe in b; The sum of the products of the diameters and lengths of all pre-buried pipes in a is divided by the number of pre-buried pipes to obtain the average capacity of the pre-buried pipes in the construction plan of a; Then the ratio of the average capacity of the pre-buried pipeline in the construction plan of a to the number of bends in the pre-buried pipeline of a is recorded as the air circulation efficiency of the pre-buried pipeline path of a; that is, the more turns there are on the pre-buried pipeline path, the greater the impact on the air circulation speed; Similarly, the average capacity of the pre-buried pipes in the construction plan of b and the air circulation efficiency of the pre-buried pipe path of b are obtained; after normalizing the absolute value of the difference in the air circulation efficiency of the pre-buried pipe paths of a and b, the change probability of the construction plan is obtained, which is recorded as K; the larger the difference, the greater the difference between the previous and the next construction, and the unreasonable current construction plan, the greater the probability of design changes; Among them, normalization uses The hyperbolic tangent function is used to normalize the data values ​​to the interval [0,1].

[0031] Step S003: record a combination of any one of the pre-buried pipes of a and b as a control combination; obtain the construction space conflict factor and construction progress difference factor of each control combination according to the construction materials and site data and the data differences within each control combination.

[0032] The so-called construction conflict in this embodiment is mainly reflected in the overlap of the work interfaces of the construction workers of the two parties, and the obstruction of the work space. The Revit software is used to generate the construction interface space model, and the pipe model size is input. The corresponding groove opening amount and backfilling amount, the number of pre-buried construction personnel required, the years of experience of the construction personnel registered for entry, the construction scope, etc. are obtained according to the height and depth of the required pre-buried groove. A probability model of possible construction conflict between the two construction units during the pre-buried pipeline is constructed. Revit is a building information modeling software.

[0033] During the construction planning time, the conflict probability between parties a and b is first limited by their respective construction planning time intervals. The smaller the planning time interval, the more likely it is that in order to meet the construction deadline, they will seize time and invest more human resources. At the same time, this will also lead to more frequent construction conflicts, mutual interference in the work interface and work space, which will in turn reduce the construction progress and construction quality.

[0034] In this embodiment, the pre-buried construction of a single straight-line pipeline of parties a and b is regarded as a task package, and then the task packages of a and b are combined in pairs. Note that the task packages involved in the combination cannot be repeated. All combination results simulate any two task packages constructed by parties a and b at the same time, and several combinations are obtained. During the construction of any two task packages, feature modeling is performed for possible conflicts between the two parties.

[0035] Therefore, the combination of any one of the pre-buried pipes in a and any one of the pre-buried pipes in b is recorded as the control combination. Therefore, the number of control combinations Q should be the product of the number of pre-buried pipes in a m and the number of pre-buried pipes in b n.

[0036] The construction material and site data collected above include: the distance between pipelines, the number of people required for the construction of each pipeline, the area of ​​the clean room construction interface, the availability of construction materials for each pipeline, the amount of excavation and filling for each pipeline, and the average years of experience of the construction workers for each pipeline.

[0037] It should be noted that the distance between pipelines represents the distance between the center points of the actual landfill locations of any two pipelines. The number of people required for the construction of each pipeline represents the number of workers required for the construction of a certain pipeline in the construction plan. The availability rate of construction materials for each pipeline can be expressed as the number of materials prepared for the construction of each pipeline divided by the number of materials actually required for the construction of each pipeline. Under normal circumstances, the prepared materials will be more than the actual demand in order to prevent material damage and affect the construction progress, but the more materials prepared, the more money it costs. The excavation and filling volume of each pipeline represents the sum of the grooving volume and backfill volume corresponding to each pipeline. The average years of service of the construction personnel for each pipeline represents the average years of service of all construction personnel corresponding to each pipeline.

[0038] The single-person activity area set in this embodiment is Square meters is used as an example for description. Other values ​​may be set in other implementation modes and are not limited in this embodiment.

[0039] Any control combination is recorded as the target combination. The target combination includes the pth pipeline pre-buried by a and the qth pipeline pre-buried by b.

[0040] It can be seen that the construction space conflict factor of the target combination and construction progress variance factor The calculation process is: Obtain the number of construction workers for pre-burying the pth and qth pipelines in a and b respectively in the target combination, multiply the sum of the number of construction workers by the single-person activity area, and obtain the total activity area for simultaneous construction of a and b in the target combination; The ratio of the area of ​​the clean room construction interface to the total activity area of ​​the construction personnel of both parties in the target combination is converted into a value range using a logarithmic function with a base of 2. The closer the ratio is to 1 (the closer it is to 0 after logarithmic function conversion), the more likely the conflict between the two parties is. The ratio is input into a logarithmic function with a base of 2 to obtain the output value. The output value is multiplied by the distance value when a and b are pre-buried with the pth and qth pipes in the target combination, respectively, to obtain the construction space conflict factor of the target combination, which is recorded as The smaller the value, the greater the possibility of conflict in the workspace when the pipelines in the target combination are constructed simultaneously.

[0041] Obtain the availability of construction materials for the pth pre-buried pipeline in a and the availability of construction materials for the qth pre-buried pipeline in b; Get the excavation and filling volume of the pth pre-buried pipeline in a and the excavation and filling volume of the qth pre-buried pipeline in b; Get the average years of experience of the construction workers of the pre-buried p-th pipeline in a and the average years of experience of the construction workers of the pre-buried q-th pipeline in b; The difference between the construction material availability rate of the pth pipeline pre-buried in a and the construction material availability rate of the qth pipeline pre-buried in b is taken as the first difference; Calculate the ratio of the excavation and filling volume of the p-th pipeline pre-buried in a to the average years of service of the construction personnel of the p-th pipeline pre-buried in a, and record it as the first ratio; Calculate the ratio of the excavation and filling volume of the qth pipeline pre-buried in b to the average years of experience of the construction workers of the qth pipeline pre-buried in b, and record it as the second ratio; The difference between the first ratio and the second ratio is recorded as the second difference; The Euclidean norm of the vector formed by the first difference and the second difference is recorded as the construction progress difference factor of the target combination.

[0042] It should be noted that the Euclidean norm of a vector is a known calculation, that is, taking the sum of the squares of all elements in the vector and then taking the square root. The smaller the construction progress difference factor of the target combination, the greater the possibility of conflicts in the construction progress when the pipelines in the target combination are constructed at the same time. Among them, the first difference reflects the difference in the availability of construction materials when a and b construct the pth and qth pipelines respectively, the first ratio reflects the construction efficiency of the pth pipeline pre-buried by a, and the second ratio reflects the construction efficiency of the qth pipeline pre-buried by b, so the second difference reflects the difference in construction efficiency when a and b construct the pth and qth pipelines respectively. That is, the smaller the Euclidean norm of the vector, the greater the possibility of conflicts in the construction progress when the pipelines in the target combination are constructed at the same time.

[0043] According to the above method, the construction space conflict factor and construction progress difference factor of each control combination are obtained.

[0044] Step S004: Obtain the construction conflict probability according to the construction space conflict factors and construction progress difference factors of all control combinations, the construction start and end time of the construction party, and the change probability.

[0045] It can be seen that the calculation formula of construction conflict probability E is: Get the construction start time and construction end time of a and b respectively; The time difference between the construction start time and the construction end time is the construction duration; The ratio of the difference between the construction start time of a and b and the product of the construction duration of a and b is called the construction time conflict, which is recorded as ,The larger the value, the greater the possibility of construction time conflict between a and b; Where E is the probability of construction conflict, K is the probability of change, a and b are the first construction party and the last construction party, respectively, and Q is the number of control combinations. is the construction space conflict factor of the zth control combination, is the construction progress difference factor of the zth control combination. is an exponential function with a natural constant as the base. To present the inverse proportional relationship and normalization processing, the implementer can set the inverse proportional function and normalization function according to the actual situation. | | is the absolute value function.

[0046] What needs to be explained is: Known and The smaller it is, the greater the possibility of construction conflict. It represents the average impact value of all control combinations on the construction progress. The larger the K, the greater the difference between the previous and the next construction, and the unreasonable current construction plan, that is, the greater the possibility of construction conflict. is the inverse proportional value of K. Therefore, It represents the probability of construction conflict. The larger the E value is, the greater the probability of construction conflict is.

[0047] Step S005: Obtain the optimal construction plan according to the construction conflict probability and the sequence of the pipelines pre-buried by the construction party.

[0048] It is known that the optimization algorithm can be used to adjust the construction sequence of the task packages of both parties on the basis of the original construction schedule. In essence, it is to adjust the combination of task packages for simultaneous construction by both parties and the allocation of personnel for different task packages, so as to obtain the optimal construction sequence of task packages for both parties and minimize the probability of construction conflict. In this way, the optimization objective function can be constructed.

[0049] In the current construction plan, the sequence of pipelines pre-buried by each construction party is re-arranged, and the number of people required for the construction of each pipeline is readjusted, so as to obtain several different new construction plans and the sequence of new pipelines pre-buried by each construction party in each new construction plan.

[0050] According to the above method, the construction conflict probability of each new construction plan is obtained.

[0051] What needs to be explained is: the specific process of reordering the sequence sequence of pipelines pre-buried by each construction party is as follows: the sequence sequence of pipelines pre-buried by each construction party in the current construction plan is known, and a backtracking algorithm is used to arrange all data in an arbitrary order in the sequence sequence sequence of pipelines pre-buried by a, and obtain several new pipeline sequence sequences corresponding to a. A backtracking algorithm is used to arrange all data in an arbitrary order in the sequence sequence sequence of pipelines pre-buried by b, and obtain several new pipeline sequence sequences corresponding to b. Among them, the backtracking algorithm is a well-known technology, and the specific method will not be introduced here. And in the pipeline sequence sequence and its corresponding new pipeline sequence sequence, all sequences are not repeated. For example, a pipeline sequence is , then the number of corresponding new pipeline sequence sequences should be ,in Representing the factorial of 3, the new pipeline sequence is , , , , The specific process of readjusting the number of people required for the construction of each pipeline is as follows: The number of people required for the construction of each pipeline is After adjustment, the number of people required for the construction of each pipeline in the pipeline sequence is , , In order to control costs, it is necessary to ensure that the total number of people required for construction in the construction plan remains unchanged.

[0052] Any new construction plan is recorded as the target construction plan. In the target construction plan, the sequence of new pipelines pre-buried by a is recorded as the pre-target sequence, and the sequence of new pipelines pre-buried by b is recorded as the post-target sequence.

[0053] Obtain the absolute value of the difference between the ordinal value of the p-th pipeline pre-buried by a in the pipeline sequence pre-buried by a and the ordinal value of the p-th pipeline pre-buried by a in the previous target sequence, and record it as the first difference value; Obtain the absolute value of the difference between the ordinal value of the qth pipeline pre-buried by b in the pipeline sequence pre-buried by b and the ordinal value of the qth pipeline pre-buried by b in the post-target sequence, and record it as the second difference value; The product of the first difference value and the second difference value is recorded as the ordinal difference value between the pth pipeline pre-buried in a and the qth pipeline pre-buried in b; The normalized value of the mean of the ordinal difference values ​​between all the pre-buried pipelines in a and all the pre-buried pipelines in b is obtained, and the sum of the normalized value of the mean and the construction conflict probability of the target construction plan is recorded as the quality of the target construction plan.

[0054] It should be noted that the calculation formula for the quality level G of the target construction plan is: Where G is the quality of the target construction plan, is the construction conflict probability of the target construction plan, a and b are the first-entry construction party and the last-entry construction party respectively, m is the number of pre-buried pipelines in a, n is the number of pre-buried pipelines in b, is the ordinal value of the pth pipeline pre-buried by a in the sequence of pipelines pre-buried by a, is the ordinal value of the qth pipeline pre-buried by b in the sequence of pipelines pre-buried by b, is the ordinal value of the pth pipeline pre-buried by a in the previous target sequence, is the ordinal value of the qth pipeline pre-buried by b in the post-target sequence. | | is the absolute value function, is the hyperbolic tangent function, which is used to normalize the data values ​​to the interval [0,1].

[0055] What needs to be explained is: Represents the average difference between the pipeline sequence of the current construction plan and the target construction plan, and then uses its normalized value as the penalty term and Addition, that is, if the adjusted construction sequence is too different from the original construction sequence, the construction span is too large, which will increase the error probability in the pipeline pre-buried process. Therefore, while optimizing the construction sequence of the task package, it is necessary to constrain the scale of adjustment as much as possible. Therefore, the smaller the degree of excellence G, the better the target construction plan.

[0056] According to the above method, the quality of each new construction plan is obtained.

[0057] The minimum value of the pros and cons of all new construction plans is counted, and the new construction plan corresponding to the minimum value is recorded as the optimal construction plan. This can solve the problem of construction progress delay caused by obstruction of the work interface and work space during the construction process of both parties to the greatest extent.

[0058] It should be noted that if there are multiple minimum values ​​in the degree of excellence, a new construction plan corresponding to the minimum degree of excellence is randomly selected and recorded as the optimal construction plan. This is because the construction effects of construction plans with the same degree of excellence are similar, so any one can be selected.

[0059] So far, the present invention is completed.

[0060] In summary, in an embodiment of the present invention, data in the current construction plan is collected, and the probability of change is obtained according to the number of pre-buried pipelines, the caliber and the length of the pipelines by the construction party. The combination of any one of the pipelines pre-buried by the advanced construction party and the late construction party is recorded as a control combination, and the construction space conflict factor and the construction progress difference factor of each control combination are obtained according to the construction materials and site data and the data differences in each control combination. Combined with the construction start and end time of each construction party and the probability of change, the probability of construction conflict is obtained. Finally, according to the probability of construction conflict and the sequence sequence of the pipelines pre-buried by each construction party, the optimal construction plan is obtained. Therefore, the present invention obtains the optimal construction plan by adaptively adapting the sequence sequence of pipelines and the number of people required for the construction of pipelines, which can prevent the overlap of the working interface and the obstruction of the working space during the construction process of both parties, and avoids the influence of adjusting the construction sequence on the construction quality, greatly improves the collaborative construction efficiency of multiple construction parties, and optimizes the construction progress.

[0061] The present invention also provides a BIM-based construction project progress management system, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program stored in the memory to implement the steps of the aforementioned BIM-based construction project progress management method.

[0062] 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, improvements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The construction project progress management method based on BIM is characterized by: The method comprises the following steps: Collect the number of pre-buried pipelines of each construction party in the current construction plan, the start and end time of construction of each construction party, the diameter and length of each pipeline, the sequence of pipelines pre-buried by each construction party, construction materials and site data; the construction parties include the first construction party and the later construction party; the first construction party is recorded as a; the later construction party is recorded as b; The probability of change is obtained based on the number of pipelines pre-buried by the construction party, the diameter and length of the pipelines; The combination of any one of the pre-buried pipes of a and b is recorded as a control combination; according to the construction materials and site data, and the data differences within each control combination, the construction space conflict factor and the construction progress difference factor of each control combination are obtained; The construction conflict probability is obtained based on the construction space conflict factors and construction progress difference factors of all control combinations, the construction start and end time of the construction party, and the change probability; The optimal construction plan is obtained based on the probability of construction conflict and the sequence of pipelines pre-buried by the construction party; The specific steps to obtain the construction space conflict factor and construction progress difference factor of each comparison combination are as follows: Construction material and site data include the distance between pipelines, the number of people required for the construction of each pipeline, the area of ​​the clean room construction interface, the availability of construction materials for each pipeline, the amount of excavation and filling for each pipeline, and the average years of experience of the construction personnel for each pipeline; Any control combination is recorded as a target combination; the target combination includes the pth pipeline pre-buried by a and the qth pipeline pre-buried by b; According to the distance between pipelines in the target combination, the number of people required for pipeline construction, and the area of ​​the clean room construction interface, the construction space conflict factor of the target combination is obtained; According to the availability of construction materials, the amount of excavation and filling of the pipeline, and the average years of experience of the pipeline construction personnel in the target combination, the construction progress difference factors of the target combination are obtained, including: The difference between the construction material availability rate of the pth pipeline pre-buried in a and the construction material availability rate of the qth pipeline pre-buried in b is taken as the first difference; the ratio of the excavation and filling volume of the pth pipeline pre-buried in a to the average working years of the construction personnel of the pth pipeline pre-buried in a is calculated and recorded as the first ratio; the ratio of the excavation and filling volume of the qth pipeline pre-buried in b to the average working years of the construction personnel of the qth pipeline pre-buried in b is calculated and recorded as the second ratio; the difference between the first ratio and the second ratio is recorded as the second difference; the Euclidean norm of the vector formed by the first difference and the second difference is recorded as the construction progress difference factor of the target combination.

2. The method for construction project progress management based on BIM according to claim 1, characterized in that: The method of obtaining the change probability according to the number of pipelines pre-buried by the construction party, the diameter and length of the pipelines includes the following specific steps: The average of the products of the diameters and lengths of all pre-buried pipes in a is recorded as the average capacity of the pre-buried pipes in the construction plan of a; Subtract one from the number of pre-buried pipes in a, and record it as the number of elbows in a; The average capacity of the pre-buried pipes in the construction plan of a is divided by the number of bends in a, which is recorded as the air circulation efficiency of the pre-buried pipe path of a; The average of the products of the diameters and lengths of all pre-buried pipes in b is recorded as the average capacity of the pre-buried pipes in the construction plan of b; Subtract one from the number of pre-buried pipes in b, and record it as the number of elbows in b; Divide the average capacity of the pre-buried pipes in the construction plan of b by the number of bends in b, and record it as the air circulation efficiency of the pre-buried pipe path of b; The normalized value of the difference in air circulation efficiency between the pre-buried duct paths a and b is recorded as the change probability.

3. The construction project progress management method based on BIM according to claim 1 is characterized in that: The construction space conflict factor of the target combination is obtained according to the distance between the pipelines in the target combination, the number of people required for the construction of the pipelines, and the area of ​​the clean room construction interface, and the specific steps include the following: Obtain the distance between the pth pre-buried pipe in a and the qth pre-buried pipe in b, then obtain the sum of the number of people required for the construction of the pth pre-buried pipe in a and the number of people required for the construction of the qth pre-buried pipe in b, calculate the product of the sum and the preset single-person activity area, then calculate the ratio of the area of ​​the clean room construction interface to the product, input the ratio into a logarithmic function with base 2, obtain the output value, and record the product of the output value and the distance as the construction space conflict factor of the target combination.

4. The construction project progress management method based on BIM according to claim 1 is characterized in that: The construction conflict probability is obtained according to the construction space conflict factors and construction progress difference factors of all control combinations, the construction start and end time of the construction party, and the change probability, and the specific steps include the following: The mean of the product of the construction space conflict factor and the construction progress difference factor of all control combinations is recorded as the average impact value of all control combinations on the construction progress; According to the difference between the construction start and end time of a and b, the degree of construction time conflict between a and b is obtained; The product of the inverse proportional value of the change probability, the average impact value of all control combinations on the construction progress, and the construction time conflict degree of a and b is calculated, and the normalized value of the inverse proportionality of the product is recorded as the construction conflict probability.

5. The method for construction project progress management based on BIM according to claim 4 is characterized in that: The specific steps of obtaining the degree of conflict between the construction time of a and b according to the difference between the construction start and end time of a and b are as follows: The difference between the construction start time of a and b is recorded as the start time difference; The difference between the construction start time and the construction end time of a is recorded as the construction duration of a; The difference between the construction start time and the construction end time of b is recorded as the construction duration of b; The product of the construction durations of a and b is divided by the start time difference, which is recorded as the degree of construction time conflict between a and b.

6. The method for construction project progress management based on BIM according to claim 1, characterized in that: The optimal construction plan is obtained according to the construction conflict probability and the sequence of the pipelines pre-buried by the construction party, and the specific steps include the following: In the current construction plan, the sequence of pipelines pre-buried by each construction party is re-arranged, and the number of people required for the construction of each pipeline is readjusted to obtain a number of different new construction plans and a sequence of new pipelines pre-buried by each construction party in each new construction plan; Record any new construction plan as the target construction plan; In the target construction planning, the sequence of the new pipelines pre-buried in a is recorded as the pre-target sequence; the sequence of the new pipelines pre-buried in b is recorded as the post-target sequence; According to the construction conflict probability of the target construction plan, the difference between the pre-buried pipeline sequence of a and b and the previous target sequence and the subsequent target sequence, the quality of the target construction plan is obtained; the construction conflict probability of the target construction plan is obtained in the same way as the construction conflict probability; The minimum value among the advantages and disadvantages of all new construction plans is counted, and the new construction plan corresponding to the minimum value is recorded as the optimal construction plan.

7. The construction project progress management method based on BIM according to claim 6 is characterized in that: The method of obtaining the quality of the target construction plan according to the construction conflict probability of the target construction plan and the difference between the pre-buried pipeline sequence of a and b and the previous target sequence and the subsequent target sequence respectively includes the following specific steps: Obtain the absolute value of the difference between the ordinal value of the p-th pipeline pre-buried by a in the pipeline sequence pre-buried by a and the ordinal value of the p-th pipeline pre-buried by a in the previous target sequence, and record it as the first difference value; Obtain the absolute value of the difference between the ordinal value of the qth pipeline pre-buried by b in the pipeline sequence pre-buried by b and the ordinal value of the qth pipeline pre-buried by b in the post-target sequence, and record it as the second difference value; The product of the first difference value and the second difference value is recorded as the ordinal difference value between the pth pipeline pre-buried in a and the qth pipeline pre-buried in b; The normalized value of the mean of the ordinal difference values ​​between all the pre-buried pipelines in a and all the pre-buried pipelines in b is obtained, and the sum of the normalized value of the mean and the construction conflict probability of the target construction plan is recorded as the quality of the target construction plan.

8. A BIM-based construction project progress management system, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the computer program is executed by a processor, the steps of the BIM-based construction project progress management method as described in any one of claims 1 to 7 are implemented.

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