Bridge engineering construction period intelligent arrangement method and system based on big data analysis

Abstract

The application discloses a bridge engineering construction period intelligent arrangement method based on big data analysis, relates to the technical field of building engineering construction plan management, and comprises the following steps: collecting period arrangement related data and performing standardized processing to generate bridge construction period analysis data sets; identifying construction procedures and construction units to generate a bridge construction task unit set and a construction procedure related network; matching historical construction records and a current construction state to generate construction unit work hour prediction results and period influence parameters; generating procedure team initial configuration results according to an increasing number of teams in a planned total construction period; adjusting construction task unit attribution to generate procedure team balanced task schemes and procedure completion time sequences; calculating a water flow step distance by using a big difference method to generate a bridge construction initial period arrangement scheme; and verifying a total construction period and a resource occupation state to generate a bridge construction period arrangement scheme. The application improves work hour prediction accuracy, procedure connection coordination and period adaptability.

Description

Technical Field

[0001] This invention relates to the field of construction project planning and management technology, and in particular to a method and system for intelligent scheduling of bridge construction schedules based on big data analysis. Background Technology

[0002] In recent years, with the development of information management, construction progress control, and big data analysis technologies for bridge engineering, research on bridge construction period prediction and intelligent scheduling has gradually increased. Existing technologies typically collect data on construction organization design, work sequence plans, construction progress, team configuration, equipment usage, and material supply. Construction tasks are then decomposed, and the duration of each construction process is calculated based on standard working hours, historical experience, or a schedule network plan. Finally, Gantt charts, critical path methods, flow-line construction methods, or conventional optimization algorithms are used to arrange the construction sequence, number of teams, and resource allocation. Some solutions also update the construction progress based on on-site feedback and make local adjustments to delayed processes, forming a phased construction plan.

[0003] However, existing technologies for scheduling bridge construction projects still suffer from insufficient expression of task relationships and low accuracy in dynamic adjustments. On the one hand, construction procedures, construction units, technological connections, and resource sharing relationships are usually recorded in a scattered manner, making it difficult to form a unified relational structure. Historical construction efficiency, current construction status, and delay transmission status also fail to establish a continuous correspondence with specific construction tasks, resulting in a disconnect between time forecasting and schedule impact analysis. On the other hand, existing scheduling schemes mostly adopt fixed team configurations or static flow rhythms, lacking a combined approach that increases the number of teams based on the total planned duration, adjusts the affiliation of construction units according to task load, and recalculates flow steps in conjunction with resource occupation conflicts. This makes it difficult to balance total schedule constraints, team balance, and the availability of construction resources, affecting the accuracy of bridge construction schedule scheduling. Summary of the Invention

[0004] One objective of this invention is to propose a method and system for intelligent scheduling of bridge construction schedules based on big data analysis. This invention fully utilizes big data analysis, construction process association networks, time prediction, dynamic team configuration, and large difference method flow scheduling technology to achieve bridge construction task association modeling, schedule impact transmission analysis, team task balancing, and resource occupancy verification. It has the advantages of accurate time prediction, reasonable team configuration, coordinated process connection, and strong dynamic adaptability of schedule arrangement.

[0005] The intelligent scheduling method for bridge construction schedule based on big data analysis according to an embodiment of the present invention includes the following steps: Collect relevant data on the construction schedule of bridge projects and perform standardized processing to generate a dataset for bridge construction schedule analysis. Based on the bridge construction period analysis dataset, construction procedures and units are identified, the process connection relationships and resource sharing relationships are organized, and a set of bridge construction task units and a construction procedure association network are generated. By matching historical construction records and current construction status with the bridge construction task unit set, we analyze construction efficiency and delay transmission status, and generate construction unit time prediction results and schedule impact parameters. Based on the construction process association network and the construction unit time prediction results, the process completion time is calculated starting from a single shift, and the number of shifts is increased according to the total planned construction period to generate the initial configuration result of the process shifts; Based on the initial configuration results of the work team and the parameters affecting the construction period, the construction tasks are allocated, the construction unit affiliation is adjusted according to the critical flow rhythm, the completion time of the construction units is sorted, and a balanced task plan for the work team and a work completion time sequence are generated. Based on the construction process association network and the process completion time sequence, the large difference method is used to calculate the flow step distance of adjacent construction processes, determine the start time and completion time of each construction process, and generate the initial schedule arrangement plan for bridge construction. Verify the total construction period and resource occupancy status of the initial bridge construction schedule, locate the affected construction task units based on the schedule impact parameters, adjust the number of work teams, construction tasks and flow steps, and generate a bridge construction schedule.

[0006] Optionally, the associated data for the bridge construction schedule includes construction procedure data, construction unit data, historical construction records, current construction progress data, construction team data, and resource usage data. The standardization process includes time alignment, unified identification, unified measurement units, removal of abnormal data, completion of missing data, status code conversion, and organization of association relationships.

[0007] Optionally, the generation of the bridge construction task unit set and construction procedure association network includes: Based on the bridge construction period analysis dataset, each construction unit is classified and organized according to the relationship between construction procedures and construction units. Based on the workload, construction location, and construction conditions of each construction unit, construction units that can independently arrange construction tasks and calculate construction time are divided into bridge construction task units, and a set of bridge construction task units is generated by summarizing them according to the construction procedures. Based on the construction organization sequence of the bridge construction task units, determine the process connection relationship between the completion of the previous bridge construction task unit and the entry into the next bridge construction task unit. Based on the shared use of construction resources by different bridge construction task units, the resource sharing relationship is determined; The construction process and bridge construction task unit are set as process nodes and task nodes respectively. The process nodes and task nodes are connected according to their affiliation, and the task nodes are connected according to their process connection and resource sharing relationship. The construction sequence and resource occupancy status corresponding to each connection are recorded to generate a construction process association network.

[0008] Optionally, the generation of the construction unit time prediction results and the schedule impact parameters includes: Based on the construction procedures, workload, and construction conditions of each bridge construction task unit, corresponding historical task records are selected from historical construction records. The current construction status is matched with the historical task records to generate time analysis samples for each bridge construction task unit. Historical construction efficiency is calculated based on the actual completed work volume and actual construction time in the work time analysis sample. The historical construction efficiency is then corrected according to the current construction status to obtain the current construction efficiency of each bridge construction task unit. The foundation construction time is calculated based on the task workload and current construction efficiency. The foundation construction time is then corrected by combining the connection intervals corresponding to the process connection relationships and the resource waiting time corresponding to the resource sharing relationships, and the construction unit time prediction results are generated. By comparing the current construction progress with the planned construction progress, the bridge construction task units that have experienced schedule deviations are identified, and the direction of the schedule deviation is determined along the process connection and resource sharing relationships in the construction process association network. Calculate the time increment of the schedule deviation transmitted to the associated bridge construction task unit, and record the time increment, transmission direction and associated bridge construction task unit as schedule impact parameters.

[0009] Optionally, the generation of the initial configuration results for the work group includes: The execution sequence of each bridge construction task unit is determined according to the construction procedure association network, and the predicted time of the construction unit is matched to the corresponding bridge construction task unit. Assign single-shift teams to each construction process, calculate the start and end times of each bridge construction task unit, and generate single-shift team schedule calculation results; The total construction period of the bridge project corresponding to the single-shift construction period calculation result is compared with the planned total construction period. When the total construction period of the bridge project exceeds the planned total construction period, the construction procedures to be adjusted are determined, and the number of construction teams to be adjusted is increased. The total construction period of the bridge project is recalculated based on the increasing number of construction teams until the total construction period of the bridge project does not exceed the planned total construction period. The number of construction teams corresponding to each construction process is then summarized to generate the initial configuration results of the work process teams.

[0010] Optionally, the generation of the work process shift balanced task scheme and the work process completion time sequence includes: Based on the initial configuration of the work teams, the bridge construction task units are assigned to the corresponding construction work teams, and the schedule impact parameters are matched to the associated bridge construction task units. The critical flow rhythm is determined based on the predicted time of each construction unit, the time increment, and the number of construction teams. The construction duration of each bridge construction task unit undertaken by each construction team is compared with the critical flow rhythm. The assignment of bridge construction task units among construction teams in the same construction process is adjusted to generate a balanced task plan for work process teams. Based on the balanced task scheme of work groups and the construction process association network, the completion time of each bridge construction task unit is calculated, and the tasks are arranged according to the execution order and completion time of the construction process to generate a process completion time sequence.

[0011] Optionally, the generation of the initial construction schedule for the bridge includes: Based on the construction process association network, the execution order of adjacent construction processes and bridge construction task units is determined, and the construction duration of each bridge construction task unit is extracted from the process completion time sequence. The construction durations corresponding to adjacent construction procedures are accumulated according to the execution order. The accumulated time series are subtracted in a staggered manner, and the maximum difference is determined as the flow step of adjacent construction procedures. Based on the planned start time of the bridge project, the start time of each construction procedure is determined step by step according to the execution sequence and flow distance of the construction procedures, and the completion time of each construction procedure is determined in combination with the completion time sequence of the procedures. Summarize the start and end times of each construction process, construction teams, and bridge construction task units to generate an initial schedule plan for bridge construction.

[0012] Optionally, the generation of the bridge construction schedule includes: Extract the planned start time, planned completion time, and resource occupation period of each bridge construction task unit corresponding to the initial construction schedule of the bridge construction, calculate the total construction period of the plan, and identify resource occupation conflicts; The total construction period of the plan is compared with the total planned construction period, and the affected construction task units are determined based on the associated bridge construction task units, transfer direction and time increment in the construction period impact parameters. Based on the total project duration deviation and resource usage conflict, determine the construction procedures to be adjusted, adjust the corresponding number of construction teams and the affiliation of bridge construction task units, and recalculate the flow step distance between adjacent construction procedures. Based on the adjustment results, the start and completion times of each construction process and bridge construction task unit are updated, the total construction period and resource occupancy status are reviewed, and a bridge construction schedule arrangement plan is generated.

[0013] The intelligent scheduling system for bridge construction schedule based on big data analysis according to an embodiment of the present invention includes: The data processing module is used to collect relevant data on the construction schedule of bridge projects and perform standardized processing to generate a bridge construction schedule analysis dataset. The task network construction module is used to organize the process connection relationships and resource sharing relationships, and generate a set of bridge construction task units and a construction procedure association network. The time analysis module is used to calculate the time of construction units and analyze the propagation status of schedule deviations, and generate the predicted time of construction units and schedule impact parameters. The team configuration module is used to increase the number of construction teams based on the construction process association network and the construction unit time prediction results, and generate the initial configuration results of the process teams. The task balancing module is used to allocate bridge construction task units and adjust the assignment of construction units according to the critical flow rhythm, and generate a balanced task plan for work groups and a work completion time sequence. The flow scheduling module is used to calculate the flow step distance between adjacent construction processes using the difference method, determine the start and completion times of each construction process, and generate an initial schedule arrangement for bridge construction. The schedule adjustment module is used to verify the total schedule and resource occupancy status, adjust the number of construction teams, the assignment of bridge construction task units and the flow step distance, and generate a bridge construction schedule arrangement plan.

[0014] The beneficial effects of this invention are: This invention collects construction process data, construction unit data, historical construction records, current construction progress data, construction team data, and resource occupancy data, and processes this multi-source data in a unified manner. This enables bridge construction data from different sources, in different formats, and at different time scales to establish corresponding relationships according to construction processes, construction units, and construction time. Based on this, bridge construction tasks are divided into bridge construction task units that can be independently scheduled and have their work hours calculated. Furthermore, a construction process association network is constructed through process connection relationships and resource sharing relationships. This allows the sequential constraints between construction processes, the status of construction resource occupancy, and the attribution of construction tasks to be expressed in a unified structure, providing a complete data foundation for work hour prediction, team allocation, and workflow scheduling.

[0015] This invention combines historical construction records and current construction status to calculate current construction efficiency, generating predicted construction unit time results corresponding to specific bridge construction task units. It also identifies the transmission direction and time increment of schedule deviations along the construction process correlation network, enabling the location of associated bridge construction task units affected by delays. This reduces prediction errors caused by relying solely on quota time or individual progress deviations for schedule scheduling. By incrementally increasing the number of construction teams starting from a single shift and determining the initial team configuration based on the planned total construction period, the construction team configuration can be aligned with the overall bridge project schedule constraints, reducing under-configuration or resource waste caused by determining the number of construction teams based on experience.

[0016] This invention adjusts the assignment of bridge construction task units based on schedule impact parameters and critical flow rhythm, ensuring a balanced workload across different construction teams within the same construction process. It also utilizes the difference method to calculate the flow distance between adjacent construction processes, determining the start and completion times for each process. After formulating the initial bridge construction schedule, the total schedule, construction team occupancy status, and construction resource occupancy status are reviewed. Adjustments to the number of construction teams, bridge construction task unit assignments, and flow distances based on affected task units reduce issues such as simultaneous resource occupancy, overlapping tasks among construction teams, and unreasonable connections between adjacent construction processes, thereby improving the accuracy, coordination, and dynamic adjustment capabilities of bridge construction schedule planning. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is an overall flowchart of the intelligent scheduling method for bridge engineering construction period based on big data analysis proposed in this invention; Figure 2 This diagram illustrates the prediction results of construction unit time and the generation of time-affecting parameters for the intelligent scheduling method of bridge engineering construction period based on big data analysis proposed in this invention. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0019] refer to Figures 1-2 The intelligent scheduling method for bridge construction projects based on big data analysis includes the following steps: Collect relevant data on the construction schedule of bridge projects and perform standardized processing to generate a dataset for bridge construction schedule analysis. Based on the bridge construction period analysis dataset, construction procedures and units are identified, the process connection relationships and resource sharing relationships are organized, and a set of bridge construction task units and a construction procedure association network are generated. By matching historical construction records and current construction status with the bridge construction task unit set, we analyze construction efficiency and delay transmission status, and generate construction unit time prediction results and schedule impact parameters. Based on the construction process association network and the construction unit time prediction results, the process completion time is calculated starting from a single shift, and the number of shifts is increased according to the total planned construction period to generate the initial configuration result of the process shifts; Based on the initial configuration results of the work team and the parameters affecting the construction period, the construction tasks are allocated, the construction unit affiliation is adjusted according to the critical flow rhythm, the completion time of the construction units is sorted, and a balanced task plan for the work team and a work completion time sequence are generated. Based on the construction process association network and the process completion time sequence, the large difference method is used to calculate the flow step distance of adjacent construction processes, determine the start time and completion time of each construction process, and generate the initial schedule arrangement plan for bridge construction. Verify the total construction period and resource occupancy status of the initial bridge construction schedule, locate the affected construction task units based on the schedule impact parameters, adjust the number of work teams, construction tasks and flow steps, and generate a bridge construction schedule.

[0020] In this embodiment, the associated data for bridge construction schedule includes construction procedure data, construction unit data, historical construction records, current construction progress data, construction team data, and resource usage data. Standardization processing includes time alignment, unified identification, unified measurement units, removal of abnormal data, completion of missing data, status code conversion, and organization of related relationships.

[0021] In this embodiment, the generation of the bridge construction task unit set and the construction process association network includes: Based on the bridge construction schedule analysis dataset, each construction unit is classified and organized according to the affiliation relationship between construction procedures and construction units. Specifically, the construction procedure number, construction unit number, and corresponding affiliation record are extracted from the bridge construction schedule analysis dataset. Using the construction unit number as the retrieval identifier, data belonging to the same construction unit in the planned progress, current construction progress, and historical construction records are merged, and duplicate affiliation records are deleted. The construction procedures corresponding to each construction unit are queried according to the construction procedure number, and construction units with the same construction procedure number are grouped into the same category. For construction units that do not match a construction procedure or match multiple construction procedures, the affiliation relationship is corrected according to the construction organization sequence and construction location, so that each construction unit corresponds to one construction procedure. The categories are arranged according to the execution order of the construction procedures, and within each category, construction units are arranged according to construction location and construction unit number. Based on the workload, construction location, and construction conditions of each construction unit, construction units that can independently arrange construction tasks and calculate construction time are divided into bridge construction task units, and a set of bridge construction task units is generated by summarizing them according to the construction procedures. The generation of the bridge construction task unit set is as follows: Extract the corresponding engineering quantity, construction location, and construction conditions for each construction unit from the classified construction unit records; record the engineering quantity according to a unified unit of measurement; and convert the construction location into the corresponding pier number, span number, or beam segment number. Determine the independence of each construction unit based on whether it can be continuously operated by a single construction team, whether it can form an independent start and completion time, and whether it needs to be operated synchronously with other construction units. Directly classify construction units that meet the independence criteria into bridge construction task units. For construction units containing multiple construction locations and capable of segmented construction, split them according to the construction location boundaries and engineering quantity distribution, and classify each split part into a separate bridge construction task unit. Merge adjacent construction units with small engineering quantities that cannot be independently organized, and classify the merged result into a single bridge construction task unit. Configure corresponding construction procedures, construction scope, task engineering quantity, and construction conditions for each bridge construction task unit, arrange the bridge construction task units under the same construction procedure according to the construction location sequence, and then summarize them according to the construction procedure to generate the bridge construction task unit set. Based on the construction organization sequence of the bridge construction task units, determine the process connection relationship between the completion of the previous bridge construction task unit and the entry into the next bridge construction task unit. The determination of process connection relationships is specifically as follows: Extract the construction procedures, construction locations, and construction organization sequences corresponding to each bridge construction task unit from the set of bridge construction task units; group bridge construction task units with the same construction location into the same connection sequence; arrange the bridge construction task units in each connection sequence according to the execution order of the construction procedures, and compare the start and completion conditions of adjacent bridge construction task units one by one; pair two bridge construction task units where the completion of the previous bridge construction task unit is a condition for the subsequent bridge construction task unit to start, and record the number of the previous bridge construction task unit, the number of the subsequent bridge construction task unit, and the corresponding execution order; for bridge construction task units that need to wait for the concrete to reach the specified strength or complete quality inspection before entering the next construction procedure, determine the corresponding connection interval according to the construction record, and write the connection interval into the connection record between the two bridge construction task units; for bridge construction task units that are continuously advanced in the flow construction direction between different construction locations, establish cross-location connections according to the construction location sequence; delete connections that can be constructed synchronously and do not have sequential restrictions, perform cyclic checks on all connections, eliminate connections with conflicting execution orders, and summarize to generate process connection relationships. Based on the shared use of construction resources by different bridge construction task units, the resource sharing relationship is determined; The determination of resource sharing relationships is specifically as follows: Extract the construction resource requirements corresponding to each bridge construction task unit from the set of bridge construction task units, and categorize these requirements according to construction teams, equipment, and workspaces; match bridge construction task units with corresponding construction resources based on construction team numbers, equipment numbers, and workspace numbers to form a resource occupancy record for each bridge construction task unit; arrange the resource occupancy records according to a 1-day time granularity, pair bridge construction task units occupying the same construction resource, and compare the planned usage time of two bridge construction task units; when planned usage times overlap, record the shared construction resources, overlapping time, and occupancy order to establish a resource sharing relationship; when planned usage times do not overlap but construction resources are transferred to the next bridge construction task unit after the previous one is completed, record the transfer direction and interval time of the construction resources according to the construction organization sequence to establish a continuous resource sharing relationship; delete matching records with different construction resource numbers or where the construction resources can simultaneously meet the usage requirements of two bridge construction task units, and summarize the resource sharing relationships between each bridge construction task unit. The construction process and bridge construction task unit are set as process nodes and task nodes respectively. The process nodes and task nodes are connected according to their affiliation, and the task nodes are connected according to their process connection and resource sharing relationship. The construction sequence and resource occupancy status corresponding to each connection are recorded to generate a construction process association network.

[0022] In this embodiment, the generation of construction unit time prediction results and schedule impact parameters includes: Based on the construction procedures, workload, and construction conditions of each bridge construction task unit, corresponding historical task records are selected from historical construction records. The current construction status is matched with the historical task records to generate time analysis samples for each bridge construction task unit. The generation of the time analysis sample is as follows: Bridge construction task units are read one by one from the bridge construction task unit set, and historical construction records with consistent construction procedures are used as the initial matching range; the deviation ratio between the task quantity of the bridge construction task unit and the corresponding quantity of each historical construction record is calculated, and historical construction records with a deviation ratio not exceeding 20% ​​are retained; construction conditions are divided into several matching items, and the current construction conditions are compared with the construction conditions in the historical construction records item by item, retaining historical construction records with a matching item ratio of not less than 80%; construction stages are divided according to a 10% construction completion rate, the current construction status is located to the corresponding construction stage, and the completed quantity, cumulative construction time, and resource occupancy status of the same construction stage are extracted from the retained historical construction records; the difference between the current construction status and each historical construction record in terms of construction progress and resource occupancy is calculated respectively, and the historical construction records are arranged in ascending order of difference, selecting the historical construction record at the top; the selected historical construction records are converted proportionally according to the task quantity, and bound to the construction procedures, task quantity, construction conditions, and current construction status of the bridge construction task unit to generate the corresponding time analysis sample. Historical construction efficiency is calculated based on the actual completed work volume and actual construction time in the work time analysis sample. The historical construction efficiency is then corrected according to the current construction status to obtain the current construction efficiency of each bridge construction task unit. The calculation of current construction efficiency is as follows: The actual completed work volume and corresponding actual construction time are extracted from each work-hour analysis sample. After removing downtime periods, the effective construction time is obtained. The actual completed work volume is divided by the effective construction time to calculate the historical construction efficiency of each historical task record. Weights are assigned according to the matching degree between historical task records and the status of bridge construction task units. Outliers at the top and bottom 10% of the historical construction efficiency ranking are removed. The remaining historical construction efficiencies are weighted and summarized to obtain the historical construction efficiency of the bridge construction task unit. The construction process is divided into initial, stable, and final stages according to the construction completion ratio. The current construction status is located to the corresponding construction stage. The work volume completed per unit time in the last three construction days is statistically analyzed, and its change ratio relative to historical construction efficiency is calculated. The change ratio is corrected based on the ratio of current resource occupancy to the average resource occupancy in the work-hour analysis sample. The corrected change ratio is combined with historical construction efficiency to obtain the current construction efficiency of the corresponding bridge construction task unit. The foundation construction time is calculated based on the task workload and current construction efficiency. The foundation construction time is then corrected by combining the connection intervals corresponding to the process connection relationships and the resource waiting time corresponding to the resource sharing relationships, and the construction unit time prediction results are generated. The generation of construction unit time prediction results is as follows: Extract the workload of each bridge construction task unit from the bridge construction task unit set, read the corresponding current construction efficiency, divide the workload by the current construction efficiency to obtain the foundation construction time; convert the foundation construction time to days and round up to the nearest 0.5-day time granularity; query the process connection relationship corresponding to each bridge construction task unit along the construction process association network, extract the connection interval that needs to be retained after the completion of the previous bridge construction task unit; when there are multiple previous bridge construction task units, calculate the corresponding connection interval for each, and select the maximum value; query the corresponding resource sharing relationship along the construction process association network, read the expected release time and transfer time of shared construction resources in the associated bridge construction task unit, compare the time when shared construction resources can be invested in the current bridge construction task unit with the start time allowed by the process connection relationship, and calculate the resource waiting time; when there are multiple shared construction resources, select the longest resource waiting time; compare the connection interval and the resource waiting time, add the larger value to the foundation construction time, bind it to the corresponding bridge construction task unit, and generate the construction unit time prediction result. The current construction progress is compared with the planned construction progress to identify bridge construction task units with schedule deviations. The direction of the schedule deviation is determined along the process connection and resource sharing relationships in the construction sequence association network. Specifically, the current construction progress data and the planned construction progress data are matched according to the bridge construction task units, and the time difference between the planned completion time and the current estimated completion time of each bridge construction task unit is calculated. A 5% threshold of the planned construction duration is used as the schedule deviation threshold. When the time difference is greater than the schedule deviation threshold, the corresponding bridge construction task unit is marked as having a schedule deviation, and the deviation time and current construction status are recorded. The process connection relationships in the construction sequence association network are used to query subsequent bridges that are directly connected. For each construction task unit, the deviation time of the bridge construction task unit experiencing a schedule deviation is sequentially transmitted along the process connection relationship to determine the transmission direction of the schedule deviation caused by the sequence of construction procedures. Next, along the resource sharing relationship in the construction procedure association network, related bridge construction task units that share construction resources with the bridge construction task unit experiencing the schedule deviation are queried. The resource waiting time is calculated based on the time difference between the expected release time of the construction resources and the planned usage time of the current bridge construction task unit. When the resource waiting time is greater than 0, the transmission direction of the schedule deviation caused by the resource sharing relationship is determined. The transmission paths corresponding to the process connection relationship and the resource sharing relationship are merged, and connections that do not overlap in time and do not involve schedule deviation transmission are deleted to form the schedule deviation transmission direction. Calculate the time increment of the schedule deviation transmitted to the associated bridge construction task unit, and record the time increment, transmission direction and associated bridge construction task unit as schedule impact parameters.

[0023] The calculation of the time increment is as follows: For related bridge construction task units connected by process linkage, the deviation time of the bridge construction task unit with schedule deviation is subtracted from the linkage margin in the corresponding process linkage relationship to obtain the process linkage time increment; when the calculation result is less than zero, the process linkage time increment is recorded as zero, where the linkage margin is the time difference between the planned start time of the related bridge construction task unit and the sum of the planned completion time of the previous bridge construction task unit and the linkage interval; For related bridge construction task units connected by resource sharing relationship, the actual available time of shared construction resources is subtracted from the planned usage time of the related bridge construction task unit to obtain the resource waiting time increment; when the calculation result is less than zero, the resource waiting time increment is recorded as zero, where the actual available time of shared construction resources is the sum of the corrected expected completion time of the bridge construction task unit with schedule deviation and the construction resource transfer time; When the same related bridge construction task unit has both process linkage time increment and resource waiting time increment, the larger value is selected as the time increment of the related bridge construction task unit. In this embodiment, the generation of the initial configuration result of the work group includes: The execution sequence of each bridge construction task unit is determined according to the construction procedure association network, and the predicted time of the construction unit is matched to the corresponding bridge construction task unit. Assign single-shift teams to each construction process, calculate the start and end times of each bridge construction task unit, and generate single-shift team schedule calculation results; The specific steps for generating the single-shift project duration calculation results are as follows: A construction team is assigned to each construction procedure; bridge construction task units are grouped according to the construction procedure; and the execution order of each group of bridge construction task units is determined based on the process connection relationships in the construction procedure association network. The planned start time of the bridge project is used as the start time for bridge construction task units without preceding bridge construction task units. The start time is added to the predicted time of the corresponding construction unit to obtain the completion time. For bridge construction task units with preceding bridge construction task units, the completion time of each preceding bridge construction task unit is read, and the corresponding connection intervals are superimposed. The latest time in the calculation results is selected as the allowable start time of the process. The process involves querying the time it took for the construction team in the current construction process to complete the previous bridge construction task unit, and then adding the transfer time between different construction locations to obtain the available time for the team. The process compares the allowed start time with the available time, using the later time as the start time for the current bridge construction task unit. This start time is then added to the predicted time for the corresponding construction unit to obtain the completion time for the current bridge construction task unit. The available time for each construction team in the same construction process is updated sequentially according to the execution order until the time calculation for all bridge construction task units is completed. Finally, the start time, completion time, construction process, and construction team for each bridge construction task unit are summarized to generate the single-team duration calculation result. The total bridge construction period corresponding to the single-shift work period calculation is compared with the planned total construction period. When the total bridge construction period exceeds the planned total construction period, the construction procedures to be adjusted are identified, and the number of construction teams requiring adjustment is increased. Specifically, the planned start time and the completion time of all bridge construction task units are extracted from the single-shift work period calculation results. The latest completion time is selected as the estimated completion time of the bridge project, and the time difference between the estimated completion time and the planned start time is determined as the total bridge construction period. When the total bridge construction period exceeds the planned total construction period, the difference between the two is calculated to obtain the overdue time. Starting from the latest completed bridge construction task unit, the process is reversed along the technological connection relationship in the construction procedure association network to find the starting time. For each bridge construction task unit with constraints, the construction procedures, construction unit time prediction results, and team occupancy time corresponding to each bridge construction task unit are extracted sequentially. The construction duration of the corresponding bridge construction task unit is summarized according to the construction procedures. Combined with the construction team data and resource occupancy data, construction procedures that have reached the upper limit of the number of construction teams, do not allow parallel construction in the work space, or cannot be configured simultaneously with shared construction resources are eliminated. The remaining construction procedures are arranged from longest to shortest construction duration. The construction procedure with the longest construction duration is selected as the construction procedure to be adjusted. If the construction durations are the same, the construction procedure with the later completion time is selected as the construction procedure to be adjusted. The number of construction teams for the construction procedures to be adjusted is increased by one to form an increased number of construction teams. The total bridge construction period is recalculated based on the increased number of construction teams until it does not exceed the planned total construction period. The number of construction teams corresponding to each construction process is then summarized to generate the initial team configuration results. Specifically, the increased number of construction teams is read, and the bridge construction task units corresponding to the construction processes to be adjusted are allocated to each construction team according to the execution order. The start time of each bridge construction task unit is re-determined based on the available time, process connection relationships, and resource sharing relationships of each construction team. The start time is added to the corresponding construction unit's predicted time to obtain the completion time. The start and completion times of subsequent bridge construction task units are updated level by level according to the construction process association network. The latest completion time among all bridge construction task units is selected, and the total bridge construction period is recalculated. The recalculated total bridge construction period is then... The total construction period is compared with the planned total construction period. If the total construction period of the bridge project exceeds the planned total construction period, the construction procedures to be adjusted are determined again, and the number of corresponding construction teams is increased by one within the configurable number limit of the construction team data. The allocation of bridge construction task units, calculation of start time, calculation of completion time, and comparison of the total construction period of the bridge project are repeated. If the total construction period of the bridge project does not exceed the planned total construction period, the increase in the number of construction teams is stopped, and the number of construction teams corresponding to each construction procedure, the bridge construction task units undertaken by each construction team, and the corresponding expected start time and expected completion time are recorded to generate the initial configuration results of the procedure teams.

[0024] In this embodiment, the generation of the work group balanced task plan and the work completion time sequence includes: Based on the initial configuration of the work teams, the bridge construction task units are assigned to the corresponding construction work teams, and the schedule impact parameters are matched to the associated bridge construction task units. The critical flow rhythm is determined based on the predicted time of each construction unit, the time increment, and the number of construction teams. The determination of the critical flow rhythm is as follows: the bridge construction task units are grouped according to the construction sequence, the construction duration of each bridge construction task unit is read from the construction unit time prediction results, and the time increment matching the corresponding bridge construction task unit in the schedule impact parameter is added to the construction duration to obtain the corrected construction time of each bridge construction task unit; when the same bridge construction task unit corresponds to multiple time increments, the maximum value is selected for superposition to avoid repeated calculation of the schedule impact of the same construction period. The modified construction times of all bridge construction task units within the same construction process are summed to obtain the total task time for the corresponding construction process. The total task time is then divided by the number of construction teams corresponding to the initial team configuration in the process to obtain the average flow rate of the process. The maximum modified construction time corresponding to a single bridge construction task unit in the process is extracted. The average flow rate of the process is compared with the maximum modified construction time, and the larger value is selected as the candidate flow rate of the corresponding construction process. Each candidate flow rate is rounded up according to a time granularity of 0.5 days, where 0.5 days is the smallest task scheduling unit used in the construction schedule plan. The candidate flow rates of all construction processes are compared, and the maximum value is selected as the critical flow rate. The construction duration of each bridge construction task unit undertaken by each construction team is compared with the critical flow rhythm. The assignment of bridge construction task units among construction teams in the same construction process is adjusted to generate a balanced task plan for work process teams. The specific steps for generating a balanced task plan for work processes and work teams are as follows: Based on the initial configuration of work processes and work teams, the construction duration corresponding to the bridge construction task units undertaken by each work team in the same construction process is accumulated to obtain the task time of each work team, which is then compared with the critical flow rhythm. Work teams whose task time is greater than the critical flow rhythm are identified as work teams to be adjusted. From the bridge construction task units undertaken by these work teams, bridge construction task units that can meet the requirements of process connection, resource sharing, and construction location constraints are selected and adjusted to work teams whose task time is less than the critical flow rhythm. After each adjustment, the task time of each work team is recalculated until the task time of each work team is no greater than the critical flow rhythm or there are no bridge construction task units that can be adjusted. The affiliation and execution order of the adjusted bridge construction task units are recorded, and a balanced task plan for work processes and work teams is generated. Based on the work process team balanced task scheme and the construction process association network, the completion time of each bridge construction task unit is calculated. These tasks are then arranged according to the execution order and completion time of the construction processes to generate a process completion time sequence. Specifically, according to the work process team balanced task scheme, the bridge construction task units undertaken by each construction team and their execution order are read, with the planned start time of the bridge project used as the start time. For bridge construction task units with preceding bridge construction task units, the completion time of the preceding bridge construction task units is read along the construction process association network and the connection interval is added to determine the allowable start time of the process. The allowable start time is compared with the available time of the corresponding construction team, and the later time is selected as the start time. The start time is then added to the corresponding construction duration to obtain the completion time. The completion time of all bridge construction task units is calculated level by level according to the construction process association network. Each bridge construction task unit is grouped according to the execution order of the construction processes, and within the same construction process, they are arranged from earliest to latest according to the completion time. The bridge construction task unit, construction team, start time, and completion time are recorded to generate a process completion time sequence.

[0025] In this embodiment, the generation of the initial construction schedule for the bridge includes: Based on the construction process association network, the execution order of adjacent construction processes and bridge construction task units is determined, and the construction duration of each bridge construction task unit is extracted from the process completion time sequence. The construction durations of adjacent construction procedures are accumulated according to the execution order. The accumulated time sequences are subtracted in a staggered manner, and the maximum difference is determined as the flow step distance of adjacent construction procedures. Specifically, the construction durations of adjacent construction procedures in each bridge construction task unit are extracted from the procedure completion time sequence and arranged according to the execution order of the bridge construction task units. Starting from the first bridge construction task unit, the construction duration of the previous construction procedure is accumulated sequentially to form a preceding accumulated time sequence. The first accumulated time of the subsequent construction procedure is recorded as zero. Starting from the second bridge construction task unit, the construction duration corresponding to the previous bridge construction task unit is accumulated sequentially to form a subsequent staggered accumulated time sequence. The corresponding time in the subsequent staggered accumulated time sequence is subtracted from each time in the preceding accumulated time sequence to obtain the flow interval difference sequence. The maximum value in the flow interval difference sequence is selected as the flow step distance of adjacent construction procedures. Based on the planned start time of the bridge project, the start time of each construction procedure is determined step by step according to the execution sequence and flow step distance. The completion time of each construction procedure is determined in conjunction with the completion time sequence of the procedures. Specifically, the start time of the first construction procedure in the execution sequence is set as the planned start time of the bridge project. The start time of the first construction procedure is added to the flow step distance of the next adjacent construction procedure to obtain the start time of the next construction procedure. The time is accumulated step by step according to the execution sequence of the construction procedures. When there are multiple preceding construction procedures, the start time of each preceding construction procedure is added to the corresponding flow step distance, and the latest time is selected as the start time of the current construction procedure. The completion time of the bridge construction task unit within each construction procedure is extracted from the procedure completion time sequence relative to the procedure start time. The latest completion time is selected as the construction duration of the corresponding construction procedure. The start time of the construction procedure is added to the construction duration to obtain the completion time of the construction procedure. The start time and completion time of each bridge construction task unit are determined simultaneously. Summarize the start and end times of each construction process, construction teams, and bridge construction task units to generate an initial schedule plan for bridge construction.

[0026] In this embodiment, the generation of the bridge construction schedule plan includes: Extract the planned start time, planned completion time, and resource occupation time periods for each bridge construction task unit corresponding to the initial bridge construction schedule. Calculate the total project duration and identify resource occupation conflicts. Specifically, the time difference between the planned completion time and the planned start time is determined as the total project duration. Group and sort the resource occupation time periods for each bridge construction task unit according to resource number, and calculate the intersection of resource occupation time periods corresponding to the same construction resource. When the intersection duration of two resource occupation time periods is greater than zero, accumulate the resource occupation quantity within the intersection time period and compare it with the available quantity of the corresponding construction resource. If the resource occupation quantity exceeds the available quantity, record the corresponding bridge construction task unit, conflicting resource, conflict start time, conflict end time, and excess quantity as a resource occupation conflict. When the same construction team is assigned to multiple bridge construction task units with overlapping times, the corresponding time overlap is recorded as a construction team occupation conflict. The total construction period of the plan is compared with the total planned construction period, and the affected construction task units are determined based on the associated bridge construction task units, transfer direction and time increment in the construction period impact parameters. The determination of affected construction task units is as follows: Subtract the planned total construction period from the total construction period of the scheme to obtain the total construction period deviation; when the total construction period deviation is greater than zero, mark the initial construction period arrangement scheme of bridge construction as an overdue scheme and record the overdue time; read the associated bridge construction task units, transmission direction and time increment in the construction period impact parameters, determine the associated bridge construction task units with time increments greater than zero as affected construction task units, and continue to query subsequent associated bridge construction task units along the transmission direction until the corresponding time increment is zero or there are no subsequent associated bridge construction task units; when the same bridge construction task unit corresponds to multiple construction period impact parameters, select the largest time increment as the corresponding construction period impact time, and record the affected construction task unit, associated construction procedure, transmission direction and construction period impact time; Based on the overall project duration deviation and resource usage conflicts, the construction procedures to be adjusted are determined. The number of corresponding construction teams and the assignment of bridge construction task units are adjusted, and the flow step distance between adjacent construction procedures is recalculated. Specifically, the affected construction task units and the bridge construction task units with resource usage conflicts are matched to their corresponding construction procedures. The project duration impact time, resource conflict duration, and number of bridge construction task units for each construction procedure are summarized, and construction procedures with overall project duration deviation propagation or resource usage conflicts are identified as those to be adjusted. The number of construction teams, the number of configurable construction teams, and the task time of each construction team for the construction procedures to be adjusted are read. When the number of construction teams is less than the number of configurable construction teams, an additional construction team is added, and the affected construction task units or bridge construction task units with resource conflicts are adjusted to the newly added construction team. When the number of construction teams reaches the number of configurable construction teams, the corresponding bridge construction task units are adjusted to the construction team with the shorter task time and no resource conflicts in the same construction process. Based on the adjusted bridge construction task unit affiliation, the construction duration and completion time of each bridge construction task unit are recalculated, and the cumulative time sequence of adjacent construction processes is formed according to the execution order. The flow step distance of adjacent construction processes is recalculated using the difference method. Based on the adjustment results, the start and completion times of each construction process and bridge construction task unit are updated, the total construction period and resource occupancy status are reviewed, and a bridge construction schedule arrangement plan is generated. Specifically, the adjusted number of construction teams, the affiliation of bridge construction task units, and the flow step distance are read. Based on the planned start time of the bridge project, the start time of each construction procedure is updated level by level according to the execution sequence of the construction procedures. The process-allowed start time of each bridge construction task unit is determined according to the construction procedure association network, and compared with the available time of the corresponding construction team and the available time of construction resources. The latest time is selected as the start time of the bridge construction task unit. The start time is added to the corresponding construction duration to obtain the completion time, and the latest completion time of the same construction procedure is taken as the completion time of the corresponding construction procedure. The latest completion time of all bridge construction task units is selected to recalculate the total project duration. The resource occupation period is regenerated according to the updated start time and completion time. The number of occupied construction resources and the task time of the same construction team are checked for conflicts. When the total project duration does not exceed the planned total project duration and there are no resource occupation conflicts, the start time, completion time, construction team, construction task, and resource occupation period of each construction procedure and bridge construction task unit are summarized to generate the bridge construction schedule arrangement plan.

[0027] A bridge construction schedule intelligent scheduling system based on big data analysis includes: The data processing module is used to collect relevant data on the construction schedule of bridge projects and perform standardized processing to generate a bridge construction schedule analysis dataset. The task network construction module is used to organize the process connection relationships and resource sharing relationships, and generate a set of bridge construction task units and a construction procedure association network. The time analysis module is used to calculate the time of construction units and analyze the propagation status of schedule deviations, and generate the predicted time of construction units and schedule impact parameters. The team configuration module is used to increase the number of construction teams based on the construction process association network and the construction unit time prediction results, and generate the initial configuration results of the process teams. The task balancing module is used to allocate bridge construction task units and adjust the assignment of construction units according to the critical flow rhythm, and generate a balanced task plan for work groups and a work completion time sequence. The flow scheduling module is used to calculate the flow step distance between adjacent construction processes using the difference method, determine the start and completion times of each construction process, and generate an initial schedule arrangement for bridge construction. The schedule adjustment module is used to verify the total schedule and resource occupancy status, adjust the number of construction teams, the assignment of bridge construction task units and the flow step distance, and generate a bridge construction schedule arrangement plan.

[0028] Example 1: To verify the feasibility of this invention in practice, it was applied to the construction schedule of a continuous beam bridge spanning a river in the suburbs of a city. The bridge is approximately 860m long, comprising 24 piers, 2 abutments, and 25 construction spans. Construction work included pile foundation drilling, reinforcement cage installation, concrete pouring, abutment construction, pier construction, scaffolding erection, beam pouring, prestressing tensioning, bridge deck paving, and installation of ancillary facilities. The construction site was equipped with reinforcement teams, formwork teams, concrete teams, prestressing teams, and bridge deck construction teams, along with 2 crawler cranes, 3 truck cranes, 6 sets of formwork, and 2 sets of concrete pumping equipment. The original construction plan arranged work times separately for each construction process, with the number of construction teams mainly determined by experience. Waiting times between processes and the status of shared resource usage were manually checked. On-site records show that some pier locations experienced construction time deviations due to differences in project volume and construction conditions. Delays in concrete curing, quality inspection, and equipment relocation were not reflected in subsequent tasks in a timely manner. This resulted in concentrated tasks for the steel reinforcement team, overlapping periods of waiting for formwork release for the beam construction team, and overlapping periods of crawler crane usage. The original construction schedule corresponded to an estimated total construction period of 286.5 days, exceeding the planned total construction period of 248 days.

[0029] In this scenario, data on construction procedures, construction units, historical construction records, current construction progress, construction teams, and resource usage are collected. Construction time is uniformly converted to days, and data is associated according to construction procedure number, construction unit number, and construction location. Based on the workload, location, and independent commencement and completion capabilities of each construction unit, the construction content is divided into 138 bridge construction task units. Process connections are established based on construction organization sequence, concrete curing requirements, and quality inspection requirements. Resource sharing relationships are established based on the shared use of construction teams, lifting equipment, formwork, and workspace, forming a construction procedure association network. Sixty-two historical construction records of similar bridges are used to match each bridge construction task unit. Construction efficiency and predicted construction unit time are calculated based on the current construction status. The system identifies schedule deviations and their transmission directions by comparing the current construction progress with the planned construction progress. The system calculates the total bridge project duration starting from a single team configuration. When the total duration exceeds the planned total duration, the number of construction teams for the corresponding construction procedure is increased. The assignment of bridge construction task units within the same construction procedure is adjusted based on schedule impact parameters and critical flow rhythm. After balancing the tasks of each work team, the task completion time is arranged according to the execution sequence of the construction procedures. The large difference method is used to calculate the flow distance of adjacent construction procedures, and an initial schedule arrangement plan for bridge construction is generated. The total schedule, the occupation status of construction teams, and the occupation status of construction resources are reviewed. Based on the review results, the number of construction teams, the assignment of bridge construction task units, and the flow distance are adjusted.

[0030] In the on-site scheduling data, the duration of pile foundation construction under a single-shift configuration was 72 days, pile cap construction was 48.5 days, pier construction was 53 days, and beam construction was 91.5 days. The maximum and minimum task time for the rebar team differed by 18 days, while the corresponding difference for the formwork team was 15.5 days, indicating a significant imbalance in the original task allocation. After increasing the number of shifts according to the planned total construction period, 3 construction teams were allocated for pile foundation construction, 2 for pile cap construction and 2 for pier construction, and 3 for beam construction. After adjusting the bridge construction task unit allocation, the task time difference for the rebar team was reduced to 4.5 days, and the task time difference for the formwork team was reduced to 3.5 days, with the critical flow rhythm determined to be 6.5 days. Based on the time sequence of process completion, the time interval between pile foundation construction and abutment construction is 8 days, the time interval between abutment construction and pier construction is 6.5 days, the time interval between pier construction and scaffold erection is 7 days, and the time interval between beam construction and bridge deck paving is 9.5 days.

[0031] During the resource allocation review of the initial bridge construction schedule, four conflicts were identified regarding crawler crane usage, three regarding formwork usage, two regarding concrete pumping equipment usage, and two regarding construction team usage. After locating the corresponding bridge construction task units based on the schedule impact parameters, four bridge construction task units were reassigned to construction teams with shorter task durations, and the execution order of three bridge construction task units was adjusted to stagger the time periods of shared construction resource usage. The relevant flow step distances and task completion times were then recalculated. The resulting bridge construction schedule did not result in any overlapping tasks undertaken by construction teams simultaneously, the amount of shared construction resources used did not exceed the available resources on site, and the estimated total construction period was adjusted from 286.5 days to 247 days, falling within the planned total construction period of 248 days. All related bridge construction task units affected by schedule deviations were able to be mapped to specific transfer directions and time increments. This satisfies the schedule requirements for time prediction, task balancing among teams, seamless workflow coordination, and resource allocation during bridge construction.

[0032] Table 1. Comprehensive Comparison of Bridge Construction Schedule Scheduling Methods

[0033] As shown in Table 1, the average absolute percentage error of the construction unit time prediction using the method of this invention is 7.9%, lower than the 10.8% of the traditional method; the average deviation of the process start time is reduced from 3.4 days to 2.3 days. This is because the present invention filters historical construction records based on construction procedures, workload, and construction conditions, and adjusts construction efficiency in conjunction with the current construction status. Simultaneously, it comprehensively considers the completion time of preceding tasks, process connection intervals, and available construction resources through a construction procedure association network, making the time prediction results and start-up schedule more consistent with the on-site construction conditions.

[0034] The method of this invention achieves an accuracy rate of 89.4% in identifying schedule deviations, which is higher than the 82.6% of traditional methods. By identifying the process connection and resource sharing relationships, the method can identify the direction and time increment of schedule deviations along subsequent construction tasks, reducing the omission of indirect impacts caused by equipment delays, formwork turnover, and work team transfers, and providing an accurate basis for subsequent work team adjustments and workflow scheduling.

[0035] Regarding resource allocation, the method of this invention reduces resource allocation conflicts in the first round of scheduling from 11 to 7, and the average number of adjustment rounds required to achieve a conflict-free solution is reduced from 3.2 to 2.1. This invention considers resource sharing status simultaneously in the task allocation and flow step calculation stages, and directly adjusts task affiliation, execution order, and flow step based on conflicting resources and associated bridge construction task units, thus reducing ineffective adjustments and repetitive conflicts.

[0036] The planned total construction period fulfillment rate of the method of this invention is 91.7%, which is higher than the 83.3% of the traditional method, and the average utilization rate of key construction resources has increased from 75.4% to 80.2%. This result is mainly due to the increasing number of construction teams according to the planned total construction period and the balancing of bridge construction task units according to the flow rhythm, which keeps the team configuration, task allocation and resource use coordinated, and reduces the idle and concentrated occupation of construction resources.

[0037] The time for generating and reviewing a single-round plan has been reduced from 42.6 minutes to 29.8 minutes. This invention organizes construction tasks, process connections, and resource sharing relationships in a unified manner through a construction process association network, and sequentially completes time prediction, team allocation, task balancing, flow step calculation, and resource review, reducing the time required for manual querying and repeated modification of construction plans.

[0038] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for intelligent scheduling of bridge construction schedules based on big data analysis, characterized in that: Includes the following steps: Collect relevant data on the construction schedule of bridge projects and perform standardized processing to generate a dataset for bridge construction schedule analysis. Based on the bridge construction period analysis dataset, construction procedures and units are identified, the process connection relationships and resource sharing relationships are organized, and a set of bridge construction task units and a construction procedure association network are generated. By matching historical construction records and current construction status with the bridge construction task unit set, we analyze construction efficiency and delay transmission status, and generate construction unit time prediction results and schedule impact parameters. Based on the construction process association network and the construction unit time prediction results, the process completion time is calculated starting from a single shift, and the number of shifts is increased according to the total planned construction period to generate the initial configuration result of the process shifts; Based on the initial configuration results of the work team and the parameters affecting the construction period, the construction tasks are allocated, the construction unit affiliation is adjusted according to the critical flow rhythm, the completion time of the construction units is sorted, and a balanced task plan for the work team and a work completion time sequence are generated. Based on the construction process association network and the process completion time sequence, the large difference method is used to calculate the flow step distance of adjacent construction processes, determine the start time and completion time of each construction process, and generate the initial schedule arrangement plan for bridge construction. Verify the total construction period and resource occupancy status of the initial bridge construction schedule, locate the affected construction task units based on the schedule impact parameters, adjust the number of work teams, construction tasks and flow steps, and generate a bridge construction schedule.

2. The intelligent scheduling method for bridge engineering construction period based on big data analysis according to claim 1, characterized in that, The bridge construction schedule data includes construction procedure data, construction unit data, historical construction records, current construction progress data, construction team data, and resource usage data. The standardization process includes time alignment, unified identification, unified measurement units, removal of abnormal data, completion of missing data, status code conversion, and organization of related relationships.

3. The intelligent scheduling method for bridge construction schedule based on big data analysis according to claim 1, characterized in that, The generation of the bridge construction task unit set and construction procedure association network includes: Based on the bridge construction period analysis dataset, each construction unit is classified and organized according to the relationship between construction procedures and construction units. Based on the workload, construction location, and construction conditions of each construction unit, construction units that can independently arrange construction tasks and calculate construction time are divided into bridge construction task units, and a set of bridge construction task units is generated by summarizing them according to the construction procedures. Based on the construction organization sequence of the bridge construction task units, determine the technological connection relationship between the completion of the previous bridge construction task unit and the commencement of the next bridge construction task unit. Based on the shared use of construction resources by different bridge construction task units, the resource sharing relationship is determined; The construction process and bridge construction task unit are set as process nodes and task nodes respectively. The process nodes and task nodes are connected according to their affiliation, and the task nodes are connected according to their process connection and resource sharing relationship. The construction sequence and resource occupancy status corresponding to each connection are recorded to generate a construction process association network.

4. The intelligent scheduling method for bridge engineering construction period based on big data analysis according to claim 1, characterized in that, The generation of the construction unit time prediction results and schedule impact parameters includes: Based on the construction procedures, workload, and construction conditions of each bridge construction task unit, corresponding historical task records are selected from historical construction records. The current construction status is matched with the historical task records to generate time analysis samples for each bridge construction task unit. Historical construction efficiency is calculated based on the actual completed work volume and actual construction time in the work time analysis sample. The historical construction efficiency is then corrected according to the current construction status to obtain the current construction efficiency of each bridge construction task unit. The foundation construction time is calculated based on the task workload and current construction efficiency. The foundation construction time is then corrected by combining the connection intervals corresponding to the process connection relationships and the resource waiting time corresponding to the resource sharing relationships, and the construction unit time prediction results are generated. By comparing the current construction progress with the planned construction progress, the bridge construction task units that have experienced schedule deviations are identified, and the direction of the schedule deviation is determined along the process connection and resource sharing relationships in the construction process association network. Calculate the time increment of the schedule deviation transmitted to the associated bridge construction task unit, and record the time increment, transmission direction and associated bridge construction task unit as schedule impact parameters.

5. The intelligent scheduling method for bridge construction schedule based on big data analysis according to claim 1, characterized in that, The generation of the initial configuration results for the work group includes: The execution sequence of each bridge construction task unit is determined according to the construction procedure association network, and the predicted time of the construction unit is matched to the corresponding bridge construction task unit. Assign single-shift teams to each construction process, calculate the start and end times of each bridge construction task unit, and generate single-shift team schedule calculation results; The total construction period of the bridge project corresponding to the single-shift construction period calculation result is compared with the planned total construction period. When the total construction period of the bridge project exceeds the planned total construction period, the construction procedures to be adjusted are determined, and the number of construction teams to be adjusted is increased. The total construction period of the bridge project is recalculated based on the increasing number of construction teams until the total construction period of the bridge project does not exceed the planned total construction period. The number of construction teams corresponding to each construction process is then summarized to generate the initial configuration results of the work process teams.

6. The intelligent scheduling method for bridge engineering construction period based on big data analysis according to claim 1, characterized in that, The generation of the work process shift balanced task plan and the work process completion time sequence includes: Based on the initial configuration of the work teams, the bridge construction task units are assigned to the corresponding construction work teams, and the schedule impact parameters are matched to the associated bridge construction task units. The critical flow rhythm is determined based on the predicted time of each construction unit, the time increment, and the number of construction teams. The construction duration of each bridge construction task unit undertaken by each construction team is compared with the critical flow rhythm. The assignment of bridge construction task units among construction teams in the same construction process is adjusted to generate a balanced task plan for work process teams. Based on the balanced task scheme of work groups and the construction process association network, the completion time of each bridge construction task unit is calculated, and the tasks are arranged according to the execution order and completion time of the construction process to generate a process completion time sequence.

7. The intelligent scheduling method for bridge engineering construction period based on big data analysis according to claim 1, characterized in that, The generation of the initial construction schedule plan for the bridge includes: Based on the construction process association network, the execution order of adjacent construction processes and bridge construction task units is determined, and the construction duration of each bridge construction task unit is extracted from the process completion time sequence. The construction durations corresponding to adjacent construction procedures are accumulated according to the execution order. The accumulated time series are subtracted in a staggered manner, and the maximum difference is determined as the flow step of adjacent construction procedures. Based on the planned start time of the bridge project, the start time of each construction procedure is determined step by step according to the execution sequence and flow distance of the construction procedures, and the completion time of each construction procedure is determined in combination with the completion time sequence of the procedures. Summarize the start and end times of each construction process, construction teams, and bridge construction task units to generate an initial schedule plan for bridge construction.

8. The intelligent scheduling method for bridge construction schedule based on big data analysis according to claim 1, characterized in that, The generation of the bridge construction schedule plan includes: Extract the planned start time, planned completion time, and resource occupation period of each bridge construction task unit corresponding to the initial construction schedule of the bridge construction, calculate the total construction period of the plan, and identify resource occupation conflicts; The total construction period of the plan is compared with the total planned construction period, and the affected construction task units are determined based on the associated bridge construction task units, transmission direction and time increment in the construction period impact parameters. Based on the total project duration deviation and resource usage conflict, determine the construction procedures to be adjusted, adjust the corresponding number of construction teams and the affiliation of bridge construction task units, and recalculate the flow step distance between adjacent construction procedures. Based on the adjustment results, the start and completion times of each construction process and bridge construction task unit are updated, the total construction period and resource occupancy status are reviewed, and a bridge construction schedule arrangement plan is generated.

9. A bridge engineering construction schedule intelligent scheduling system based on big data analysis, comprising the bridge engineering construction schedule intelligent scheduling method based on big data analysis as described in any one of claims 1 to 8, characterized in that, include: The data processing module is used to collect relevant data on the construction schedule of bridge projects and perform standardized processing to generate a bridge construction schedule analysis dataset. The task network construction module is used to organize the process connection relationships and resource sharing relationships, and generate a set of bridge construction task units and a construction procedure association network. The time analysis module is used to calculate the time of construction units and analyze the propagation status of schedule deviations, and generate the predicted time of construction units and schedule impact parameters. The team configuration module is used to increase the number of construction teams based on the construction process association network and the construction unit time prediction results, and generate the initial configuration results of the process teams. The task balancing module is used to allocate bridge construction task units and adjust the assignment of construction units according to the critical flow rhythm, and generate a balanced task plan for work groups and a work completion time sequence. The flow scheduling module is used to calculate the flow step distance between adjacent construction processes using the difference method, determine the start and completion times of each construction process, and generate an initial schedule plan for bridge construction. The schedule adjustment module is used to verify the total schedule and resource occupancy status, adjust the number of construction teams, the assignment of bridge construction task units and the flow step distance, and generate a bridge construction schedule arrangement plan.

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