十多年来,法国工程师们研究发展一种构思新颖的隧道施工法,姑拟译作“超前切削掏槽施工法”(简称“掏槽法”)。这个施工法无论是在岩石或松软地层都可以应用。掘进时对围岩扰动很少,对环境影响很微,即使隧道的覆盖土层不厚,由于施工引起地面沉陷比其他施工法要小得多,这是这个新施工法的突出优点,因此特别适用于城市地下铁道施工。 For more than a decade, French engineers have been studying the development of a novel concept of tunnel construction, which is intended to be translated as the “Advanced Cutting Undercut Construction” (“Cutting Law”). This method of construction can be applied both in rock and in soft formations. There is very little perturbation of the surrounding rock during tunneling and very little impact on the environment. This is especially true for the outstanding advantages of this new construction method, due to the fact that the ground subsidence caused by the construction is much smaller than that of other construction methods, even if the tunnel cover is not so thick Construction of the city subway.