| The thesis comes from the program based on the science and technology of traffic construction in western,which is "one of the key technology studies on the special long tunnel of Xuefeng Mountain—investigation and study of groundwater in Xuefeng Mountain tunnel area ". It mainly studies the effect of groundwater and soil environment in tunnel location area when tunnel is constructing. Various disciplines such as groundwater hydrology, soil fertility and environmental protection are applied to appraise influence of groundwater and soil environment in tunnel location area; the destroying form and mechanism of groundwater environment are introduced in detail with survey method and diagram method during the construction of tunnel.after analyzing the law and characteristic of groundwater pouring from fracture, it selects balanced and jidui theories to appraise amounts and quality of groundwater resource , and adopts mathematical statistics theory to study the change rule of soil environment near tunnel location area being constructed .The thesis introduces some methods of groundwater evaluation such as analysis method, numerical method, balanced method etc. Among them,the balanced method is selected to calculate groundwater amounts according to tunnel actual condition. After contrasting the quantity of groundwater pouring from tunnel to the total quantity in study region, it can draw a conclusion that the influence degree of groundwater exploitation after the tunnel has been completed and provide a decision-making for the industry and agricultural plan of the town . Moreover, It also discusses the functions of groundwater exploitation in Xuefeng Mountain tunnel location area .The thesis summarizes the mechanism of groundwater pollution when the tunnel is being constructed. It also introduces some evaluation methods such as fuzzy mathematics judging method, manpower neural networks method and nemaro digit method etc.. And then chooses two methods (jidui analysis and comprehensive evaluation method) to appraise the quantity and quality of groundwater resource during tunnel construction . It uses livings tests (fish survival tests) to carry out comparative analyses of groundwater quality, so it can draw the conclusions such as factor, range, effectiveness. then give the suggestions or measures for groundwater pollution prevention and cure.The thesis brings forth to new ideas in the studies for soil environment change caused by tunnel construction, for example, the changes of soil fertility, souralkalinity or water in soil, so that it can find out the law and reasons of soil factor change and then analyze soil component in different tunnel section. It uses difference analysis method to verify the influence for growth speed of plant in different section of tunnel, and then offers the suggestions and measures to protect the soil environment during the period of tunnel construction. |
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