Accession Number:

ADA052610

Title:

Interactions of Stress Waves with Deeply-Buried Tunnels in Geologies with Cracks and Discontinuities.

Descriptive Note:

Final rept. Feb 74-Jan 76,

Corporate Author:

CALIFORNIA RESEARCH AND TECHNOLOGY INC WOODLAND HILLS

Report Date:

1976-01-01

Pagination or Media Count:

68.0

Abstract:

The purpose of this study was to examine the response of deeply-buried tunnels to the effects of high stress dynamic loading. In the Phase I portion of the study, attention was concentrated on the effects of geologic discontinuities e.g., joints on tunnels, with particular emphasis on the interactions between joints and backpacking. In phase II, emphasis was on the response of integral tunnels in hard and soft rock geologies, and on the implementation of a coupled finite elementfinite difference method called LAP, for Linked Analysis Program for analyzing the response of thin liners to dynamic loading in geologic media. In this report, a summary is provided of the Phase I work, and a more detailed discussion is given of the Phase II effort. Recommendations are made as to work which might be conducted in an on-going program. Author

Subject Categories:

  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE