瞬变电磁法在长输管道水域穿越工程中的应用研究

Application of Transient Electromagnetic Method on Rivers in the Long Distance Pipeline Crossing Project

西气东输工程对国民经济的建设和发展有着重大意义,然而长输管道的水域穿越工程是建设中的一道难关。该文通过某河流穿越实例,研究了应用瞬变电磁法进行工程勘察的可行性。实例表明,瞬变电磁法是勘察水域地层情况的一种有效手段;其大电流、小回线的工作方式具高效、便捷的特点,也可获得较好的效果。

The west-east gas transmission project has significant meaning about the national economic construction and development, however, the project of long distance pipelines across rivers is a difficulty. Through a case of crossing river, the feasibility of the application of TEM （transient electromagnetic method） in the geotechnical surveying is studied. The practice example shows that the TEM is an effective means of surveying the stratum situation in water zone;and the working way with large current and small back line is also feasible.