After breaking down the work and estimating the sub-tasks, a preliminary schedule can be developed. Import the completed WBS breakdown table into project scheduling software as an Excel sheet. Then, edit the sequence and logical relationships between tasks, and set initial parameters such as start times, personnel allocations, and machinery quotas. This preliminary schedule is then simulated in 4D construction using Navisworks software. Below is the theoretical approach to construction schedule planning based on BIM technology:
(1) Use BIM software to assist in WBS decomposition and pre-arrange various processes for foundation pit construction;
(2) Calculate the required time for each task based on the grouped bill of quantities and the construction enterprise’s quotas, then prepare a preliminary schedule plan using Project software;
(3) Introduce constraints such as project contracts and enterprise quotas, recalculate the time needed for each subtask, compare changes against the preliminary schedule, adjust the construction plan accordingly, and optimize the schedule. Throughout this process, 4D virtual construction is performed in Navisworks, including collision detection between structures. Any detected collisions are analyzed to identify root causes. If modeling errors arise during the foundation pit drawing conversions, the model should be corrected. Otherwise, these issues stem from design flaws, requiring prompt communication with the foundation pit survey and design team, as well as coordination between design and construction parties to resolve the problems;
(4) If the construction timeline and enterprise quotas cannot meet the client’s requirements, contract work must be completed by adjusting the enterprise quotas. The enterprise must increase its quotas to satisfy normal construction demands.
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