The invention discloses a construction
monitoring system for a horizontal warehouse arched roof based on multi-
modal data fusion, relates to the technical field of construction monitoring, and is used for solving the problem of poor structural construction anomaly recognition. The method comprises the steps of collecting multi-
modal data and completing synchronous preprocessing, setting a sampling frequency according to
modal characteristics, dividing construction stages, constructing a stage response function, dynamically updating during stage switching, fitting an actual observation value and a prediction value, extracting a modal response deviation degree, constructing a credibility function and evaluating
data reliability. Further analyzing a residual trend, adjusting an abnormal
score in combination with credibility, identifying a collaborative abnormal behavior between modals, systematically constructing a modal causal graph, identifying an abnormal propagation path, extracting modal conduction characteristic information, and triggering a risk
response strategy according to the modal causal graph, so that dynamic tracking of the structural
abnormality in the construction process of the horizontal warehouse arched roof is realized; and the accuracy of construction process monitoring identification is improved.