某特长铁路隧道断层涌水研究

发布时间：2018-02-07 16:02

本文关键词： 铁路隧道断层涌水量网络模型灰色理论　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：通常在铁路隧道勘察设计阶段，通过现场水文试验获取水文地质参数，进而计算出隧道的可能涌水量。但是在实际操作中，现场试验受试验条件控制往往难以实施，只能采用相关地层水文地质参数的经验值，而隧道实际开挖时，隧道围岩应力状态发生变化，勘察设计阶段划分富水段落与实际涌水段落也存在较大差异，受诸多的不利因素影响，，导致涌水量计算值与隧道开挖时实际涌水量偏差较大，不利于隧道施工建设与运营安全。本文以某铁路特长隧道断层涌水段落为研究对象，在前期野外调查、物探、钻探的基础上，采用数值模拟方法对隧道研究区建立概念模型进行应力分析，直接模拟施工开挖后隧道可能的应力集中段落，针对应力集中部位进行钻探取样，通过无损检测技术对试样内部孔隙结构进行扫描，采用孔隙网络模型对试样结构进行三维重建，预测岩土样的水文地质相关参数，从而计算隧道涌水量。当隧道实际开挖后，采用灰色理论的GM（1,1）模型对隧道施工后涌水量变化情况分析和预测，形成了一套从勘察、设计到施工各个阶段预测隧道实际涌水情况的研究方法。
[Abstract]:Usually in the phase of railway tunnel investigation and design, hydrogeological parameters are obtained by field hydrological test, and then the probable water discharge of tunnel is calculated. However, in practical operation, the field test is often difficult to be carried out under the control of test conditions. The experimental values of hydrogeological parameters can only be used, and the stress state of surrounding rock changes when the tunnel is actually excavated, and there is also a great difference between the rich water section and the actual water inflow section in the phase of investigation and design. Due to the influence of many unfavorable factors, the calculation value of water inflow is quite different from the actual water inflow during tunnel excavation, which is not conducive to the safety of tunnel construction and operation. On the basis of field investigation, geophysical exploration and drilling, a numerical simulation method is used to analyze the stress of the conceptual model established in the study area of the tunnel, taking the section of fault gushing in a railway tunnel as the research object, and on the basis of field investigation, geophysical exploration and drilling in the early stage. Direct simulation of the possible stress concentration section of the tunnel after construction excavation, drilling sampling for the stress concentration site, and scanning the pore structure of the sample by non-destructive testing technology. The pore network model is used to reconstruct the sample structure, and the hydrogeological parameters of the rock and soil samples are forecasted, so as to calculate the water inflow of the tunnel. This paper analyzes and forecasts the variation of water inflow after tunnel construction by using the GM1 / 1) model of grey theory, and forms a set of research methods for predicting the actual water inflow of tunnel from reconnaissance, design to construction stages.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U452.11

【共引文献】