S.-R. Sun's scientific contributions
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Publications (4)
The ground surface settlement models caused by tunnel excavation are summarized. The discontinuity plane geological characteristics of Hongfeng doubled arch tunnel in Jin-Li-Wen Expressway are investigated and analyzed. The ground surface settlement rule cased by excavation of doubled arch tunnel in case of partial pressure is researched. The groun...
The mainly factors affecting overbreak in the tunnels include the geological characteristics of rock mass and geological constitution. The problems of overbreak are met during rock mass excavation. From the mechanism of rock rupture, the fractal dimension of tunnel perimeter is researched on the jointed rock mass. The generalized fractal dimension...
The geological characteristics of rock mass are main factors of affecting overbreak-underbreak of tunnels. It is important to analyze and forecast overbreak-underbreak of tunnels for evaluating rock mass quality correctly and classifying the rock mass and researching the relation between rock mass quality and overbreak-underbreak. The relations amo...
The basic principal, basic method and general situation of discontinuity surface mapping are summarized. Combined geodesic discontinuity surface parameters in the fields, a mapping method based on mechanics mechanism is put forward on the basis of considering mechanics mechanism of rock fracture. The technology is applied to forecast of overbreak i...
Citations
... Based on the theory of geological statistical model, the theory of wavelet neural network and the theory of the opening over-excavation, the prediction of block over-excavation in the openings was made [6] . A mapping method was put forward based on the mechanics mechanism of rock fracture and this technology was applied to the forecast of over-excavation in jointed rock masses openings [13] . In this work, Bayes discriminant analysis(BDA) theory was introduced and applied to forecasting the overexcavation of underground opening. ...
... The variation of the overbreak S (%) with the RMR value of the surrounding rock masses was investigated, and a logarithmic correlation between them was found (see Fig. 2). The obtained reversal correlation was confirmed by other authors [1,5]. When all the surrounding rock masses were in the highest category, the maximal overbreak could be reduced by 11.99%. ...
... Fractal geometry has already been widely used in geomechanics, of which the contour line of tunnel face is proved to be self-similarity (Xiao et al. 2010;Su et al. 2006;Zhang et al. 2012). Sun et al. (2005) studied the generalized fractal dimension of tunnel perimeter in jointed rockmass and found that the higher the fractal dimension is, the more volume may be caused by overbreak. The former research mainly studies the effect of the geological factors on overbreak and underbreak qualitatively. ...
