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基于流固耦合理论,采用三维数值模拟的方法,研究了寒岭界隧道断层破碎带富水隧道中水压力的分布规律和渗水量的预测。结果表明:隧道开挖后,因扰动而产生超静孔隙水压力和地应力耦合,使拱腰部位出现的应力集中最为显著,其次是拱顶部位。针对该段出现的病害,提出了采用2环帷幕注浆与超前预支护的综合处治方法,分别处治了塌方段和涌水段病害,处治效果明显。
Based on the fluid-solid coupling theory, three-dimensional numerical simulation method was used to study the distribution of water pressure and prediction of water infiltration in water-rich tunnels in the fractured zone of the Cold-ridge Tunnel. The results show that after the excavation of the tunnel, the coupling between the excessively static pore water pressure and the soil stress resulted in the most significant stress concentration on the arch waist and the second is the vault. In view of the disease occurred in this section, a comprehensive treatment method using 2-ring curtain grouting and advanced precaution was put forward, and the diseases of landslide and water gushing were treated respectively, and the treatment effect was obvious.