本文作者重点论证贯通测量的关键手段为定向测量。定向测量目的,必须建立一个正确竖直面。尽管定向测量方法众多,但是正确理解应该只有物理方法和几何方法两大类定向。那么如何正确地选择定向方法及如何进行定向?文章已十分清楚分析和论证,并对几何定向理论及计算进行深化,从而使几何定向方法有进一步的突破与创新。大量的隧道工程贯通实践足以证明,深化后的几何定向法、已成为上海市隧道工程公司贯通测量的拳头产品,深受广大测量行家青睐。目前,此法将继续为地铁1号线工程七台盾构掘进贯通测量服务。 The author of this article focuses on the key measure of penetration measurement for directional measurement. For the purpose of directional measurement, a correct vertical plane must be established. Although there are many directional measurement methods, it is only correctly understood that there should be only two major categories of physical methods and geometric methods. So how to select the correct orientation method and how to orient it? The article has been very clear analysis and demonstration, and deepens the geometric orientation theory and calculation, so that the geometric orientation method has further breakthroughs and innovations. A large number of tunnel engineering practice is sufficient to prove that the deepened geometric orientation has become the fist product of Shanghai tunnel engineering company through measurement and is favored by the majority of measurement experts. At present, this method will continue to tunnel through the metro line of seven shield tunneling measurement services.