基于瑞利面波椭圆极化特性的隧道面波波场实验和模拟研究

Tunnel has an important and irreplaceable role. Belonging to the underground construction, tunnel's complicated geological conditions surrounding rock, often encounter bad and special geological location. Despite we do engineering investigations of the tunnel site at investigation stage, due to the limit of exploration depth, resolution and terrain and other factors, engineering survey cannot fully meet the requirements of tunnel construction. In that case, we often need to work tunnel geological prediction. Currently, the tunnel prediction methods are based on grew arrangement such as TSP、TGP, or the spatial arrangement such as TST, and when it is working, it will take up the construction of the tunnel work face construction, thus the method is limited. This paper prediction the tunnel work face, based on the Rayleigh-wave’s elliptical polarization characteristics of single three-component data, while the application conducts prediction research on tunnel Rayleigh waves, intending to apply methods based on numerical simulation, physical simulation, and the real data, providing a theoretical basis for the development of a single-point multi-component prediction method based on elliptical polarization characteristics. And the research results have important implications for the development of the tunnel prediction methods.

隧道作为一种重要的构造物，围岩地质情况复杂多变，常遇到不良和特殊的地质地段，尽管在勘察阶段进行隧址区的工程勘察，由于受到勘探深度、分辨率和地形等因素所限，工程勘察不能完全达到隧道施工的要求，常需要进行隧道地质超前预报工作。目前隧道预报方法的观测系统大都基于长大排列如TSP、TGP，或空间排列如TST，施测时会占用掌子面，且需要人工爆破作为震源，因此其施测常受到诸多限制，基于瑞利面波椭圆极化特征，则单个三分量数据即可进行隧道面波预报，申请项目拟基于数值模拟、物理模拟、现场实测数据开展基于椭圆极化特征的隧道瑞利面波波场特征研究，为发展出基于椭圆极化特性的单点多分量预报方法提供理论研究基础，研究成果对隧道预报理论的发展具有重要意义。

隧道地质超前预报作为地面地质勘察的补充手段，在隧道施工中具有的不可替代的作用，在西部山区铁路公路的建设中有越来越广泛的应用。同时，西部山区的大型水电站建设，深部矿物资源 开采也在国民经济建设中占有越来越重要的地位。隧道超前预报探测的理论基础与方法，目前主要是以地震反射波为主，均需采用长大观测排列，因此其在隧道结构的探测中受到施工条件的限制。申请项目拟采用数值模拟，物理模拟，现场实验的方法，开展隧道地质超前预报的研究，旨在为 发展基于单点多分量观测隧道面波预报提供理论基础。