层析成像技术在隧道勘探中的应用

The Application of Tomographic Imaging Technique to Tunnel Exploration

隧道洞身所在范围内风化层厚度以及断裂和隐伏构造的调查对隧道穿越至关重要,对于破碎严重、速度横向不均匀、下覆地层起伏变化较大或存在透射地形地质情况,传统工程物探工作方法很难达到令人满意的效果。本文采用基于地震波层析成像理论的地震勘探方法,通过模型反演及应用实例证实了地震波层析成像方法对解决上述问题具的有效性。

The thickness of weathered layer and the investigation of hidden structure and fracture within the tunnel scope are very important for the tunnel traversing. If the site has complicated geology situations, like serious crush, uneven transverse velocity, strong ups and downs of under layers or some transmission geography existing, traditional engineering geophysics methods are difficult to achieve perfect results. This paper uses seismic exploration method which is based on seismic wave tomographic imaging theory, through the model inversion and application example, it confirmed that the seismic wave tomographie ima- ging method can effectively solve the above problem.