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- W3117636074 abstract "With respect to an expanding phenomenon observed in tunnels drilled into soft rock beds (an extruding deformation to reduce the tunnel cross section area), it is proposed to distinguish the phenomenon caused by a dynamical mechanism from that by a chemical mechanism and to call the former a squeezing. At the same time, the existing data on tunnel constructions in Japan were collected and arranged to discuss tunnel behaviours. The result of the discussion may be summarized as follows: The squeezing phenomenon depends upon behaviours of surrounding ground after a yield destruction, and levels of the phenomenon can be estimated by determining which of the stress or the distortion behaviour the material is in. Parameters were presented that divide the levels into five levels according to the relationship between a uniaxial compression strength and a distortion value. Further, a simple method was presented to predict squeezing levels of tunnels by introducing formulas to derive circumferential distortion on the tunnel walls and comparing the result with the divided parameters. Application examples of the method are also given. 24 refs., 16 figs., 1 tab." @default.
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- W3117636074 date "1992-06-20" @default.
- W3117636074 modified "2023-09-26" @default.
- W3117636074 title "Prediction of behaviour of tunnels in squeezing ground. Squeezing jiyama ni okeru tunnel no henkei kyodo to sono yosoku hoho ni tsuite" @default.
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