Experimental validation of core-based pre-stress evaluations in rock: A case study of Changchikeng sandstone in the Tseng-wen reservoir transbasin water tunnel

Jian Hong Wu, Shu Chi Jan

研究成果: Article同行評審

15 引文 斯高帕斯(Scopus)

摘要

The Tseng-wen reservoir transbasin water tunnel project is being excavated in the Changchikeng sandstone in Taiwan, at a depth of up to 1,300 m. This study considers the accuracy of evaluations of the pre-stress of the deep rock obtained using acoustic emission (AE) and deformation rate analysis (DRA) on samples taken at outcrop. The cores were subjected to different stresses to simulate the pre-stresses present at the tunnel elevation and tested with different delay times. The results indicate that the AE method gave poor results compared with those obtained by DRA which correlated well with the "memorized" pre-stress (maximum error 29.61%). Delays of up to 14 days do not appear to have a significant influence on the pre-stress evaluation.

原文English
頁(從 - 到)549-559
頁數11
期刊Bulletin of Engineering Geology and the Environment
69
發行號4
DOIs
出版狀態Published - 2010

All Science Journal Classification (ASJC) codes

  • 岩土工程與工程地質
  • 地質學

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