The application relates to the technical field of construction risk early warning, in particular to a
building construction risk early warning method and
system based on BIM, which comprises the following steps: constructing a correlation matrix between risk nodes based on time and space dimensions for risk factors of each node in a construction process, calculating risk propagation intensity values between nodes, judging the risk correlation relationship between nodes, classifying the risk
coupling degree according to the
propagation rate, and outputting the risk
coupling matrix value. In the application, a high-
risk area is extracted by combining
spatial distribution data to realize dynamic partition management, the dynamic influence of environmental variables such as temperature,
humidity and vibration is quantified, the complex relationship between environmental conditions and risk states is revealed, the accuracy and real-time performance of
risk assessment are optimized, the node priority and
resource allocation are dynamically adjusted by analyzing the risk transfer trend and the change of the propagation path, the influence of the newly-added risk
signal is updated in real time, and the whole-process dynamic optimization of construction risk early warning is realized.