Decision Making for Residual Settlements Measures in Small Construction Projects

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  • 小規模工事を対象にした残留沈下対策の意思決定
  • ショウキボ コウジ オ タイショウ ニ シタ ザンリュウ チンカ タイサク ノ イシ ケッテイ

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Abstract

This paper presents a novel observational method, using data assimilation and soil-water coupled elasto-plastic finite element computation, for small and short-period construction projects for which observation data have not been utilized to revise the design during construction due to a limited budget. The proposed procedure is examined for its application to an actual construction project. Firstly, the final settlement of the structure is evaluated using the identified material properties by both data assimilation, using the observed settlement, and in situ physical soil tests. Secondly, the probabilistic distribution of the final settlement of the structure is obtained from the identified values and the probabilistic density function of the parameters by data assimilation using observations conducted during construction. To reduce the settlement at the final stage of construction, estimated by the probabilistic distribution not to exceed the performance criterion, a construction sequence has been adopted from among the available design alternatives.

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