The Deeply Buried Weak Seepage Crevasse Medium Of Long Tunnel Hydrogeological Model And The Water Volume Forecast Research

This article based on the northward rerouting of southern river west line issue of hydrogeological conditions topic appraisal project, studied the tunnel which deeply buried under the condition of the weak seepage crevasse medium by the ground water movement rule, mainly from the hydrology geology model established, the ground water transfusion theory inferentially, the computational method innovation and the project application etc.to make the thorough discussion, each part of contents all threaded up the weakly seep and deeply buried of the crevasse medium to carry on the analysis, simultaneously the model and the method which established had also considered the engineering geology and the hydrology geologic feature (physical quantity) deeply buried under the condition of the stress strain characteristic, we has yielded some beneficial results through the research..This article first briefly introduced the history of the transfusion fundamental research and the present situation, the summary at present of the several commonly used hydrgeological model establishment, the hypothesis of boundary condition and the model solution and the hydrogeological parameter obtained, discussed each model through the contrast analysis of the good and the bad aspects, attempt to calculate and forecast the water volume size through the crevasse network stochastic simulation method. Second, according to the dam site area original drill holes geological stick plots and the plaint hole element traces multianalysis northward rerouting of southern river derivation tunnel and the dam site area with the horizontal direction engineering geological and the hydrogeological conditions, then divided the region to forecast and computate welled up the water volume. Finally, we took the comparative analysis to the obtained data, proved the view point of this article.Through the various dam sites area drill-log analysis,we had induced three kind of typical ground water transfusios characteristics, and based on the foundation of the predecessors' research results, the artificial double-decked water level theory will introduce to analyze and to solve deeply buried tunnel under the condition of the derivation to well up the water volume question, this method has the better project significance to well up the water mechanism as well as instructs the tunnel under the different permeable condition to excavate.Applying the established fluent model and the method to the northward rerouting of southern river west line issue of project which well up in the water volume forecast and the computation, has obtained the satisfactory results, confirmed that this method will be widely used.