Prediction of Water Inrush and Construction Measurement for Long Inclined Shaft Tunnel with Water-rich in High Altitude
In order to solve the problem of groundwater prediction and control in tunnels under complex water-rich environments,a new plateau railway tunnel No.4 inclined shaft was taken as the research object,the advanced prediction method,theoretical analysis method,and on-site geological investigation method were comprehensively applied to determine the water content range of the tunnel surrounding rock,predict the tunnel water inflow and the mechanism of water inflow,and propose a treatment measure of advanced drainage hole+arch wall radial grouting.The results show that,the water-rich areas are mainly concentrated in the structural development section,carbonate rock development section,shallow buried valley section,underpass valley section,and geophysical low resistance section.The measured maximum water inflow is 1.82～3.27 times the normal water inflow,compared with normal water inflow,the predicted value of the Dupuit method is smaller,while the predicted value obtained by the Sato Bangming theory method is slightly larger,with higher accuracy than the Dupuit method.Compared with the maximum water inflow,the predicted value obtained by Sato Bonming's theory method is significantly larger,while the predicted value obtained by Goodman's method is slightly larger,with higher accuracy than Sato Bonming's theory method.
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NSTL
万方数据
维普
