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In this experiment we studied the deformation of empty underground UPVC pipes and the reflective multifactor coefficient—the earth reaction modulus E', and obtained the reasonable value for design. 本實驗研究了埋地狀態(tài)下UPVC管道空管時的變形情況及其反映多因素參數(shù)—土體反作用模數(shù)E“，得到了合理的設(shè)計取值。