Assessment and application of deep foundation pits supporting scheme by unascertained measurement model

In terms of the unascertained measurement theory, the unascertained measurement model and assessment procedure for selecting deep foundation pits supporting scheme are discussed according to an actual practice example. This paper presents an evaluation index system of appraising supporting schemes of deep foundation pits, constructs measurement functions for calculating unascertained measurement of single index, determines index weight according to an objective standard to avoid the subjective and partial opinions of experts in giving evaluated index weight, and then, establishes an unascertained measurement model-based objective weight or similar weight. The used process, the rationality and reliability of the model are explained in detail. The evaluation results are coherent to that of fuzzy synthetic evaluation method, and objectively reflect the reality; it validates that the new model is feasible in synthetic evaluation supporting schemes of deep foundation pits.