非开挖设备的发展和开挖微型岩石隧道的经济方式

Trenchless Equipment Evolution and Economic Microtunneling in Hard Rock

本文主要讨论用于地下工程建设的掘进设备的发展，主要是关于螺旋钻机和微型隧道掘进机，重点应对抗压强度大于4000PSI（27．6Mpa）的各种岩石。

This paper discusses the evolution of boring equipment used for underground utility installations,primarily related to auger boring and micro tunnel machines, with a focus on boring rock with unconfined compressive strengths greater than 4,000 PSI （27.6Mpa）.