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膨胀岩易吸水膨胀、失水崩裂 ,其稳定性差。对隧洞的设计、施工和运行将产生综合性的影响。引黄工程南干 7号隧洞 2 895m长的洞段穿过膨胀岩地层。本文介绍了膨胀岩的特性及对引黄工程的影响。
Expansive rock easily water swelling, water loss cracking, its stability is poor. The tunnel design, construction and operation will have a comprehensive impact. The Yellow River Project Nangang 7 tunnel 2 895m long section through the expansive rock formation. This article describes the characteristics of expansive rock and the impact of the Yellow River Diversion Project.