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Keywords: tunnel ti
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Proceedings Papers

Paper presented at the ISRM International Symposium, September 21–24, 1981
Paper Number: ISRM-IS-1981-130
... When the new tunnel T2 is excavated after the construction of the existing lining LI, Stress vector P2 on new tunnel ~oundary S2, which will be released at the new tunnel e~cavation, is affected both by the excava- t~on of the existing tunnel TI and by earth Fig.l n~l Noewotu,n.neloT2"0 ' t, Boundary S...

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