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无衬砌隧道在长期的使用过程中,隧道围岩遭受风化、地下水及区域地应力等不利因素的作用,导致岩体性质恶化,影响了隧道的正常使用。通过对大溪河隧道进行现场踏勘及抗剪试验,结果表明,该隧道围岩质量整体较好,不会出现大规模塌方的现象。但由于局部地段出现了较多渗水、裂损及掉块等病害现象,需要对其进行整治。本文分析总结了无衬砌隧道的病害特征,并针对大溪河隧道里出现的病害现象,提出了相应的整治措施,为同类地区无衬砌隧道病害治理措施的选用提供了一定的参考。
In the long-term use of unlined tunnel, the surrounding rock of the tunnel suffers from unfavorable factors such as weathering, groundwater and regional stress, resulting in the deterioration of rock mass and affecting the normal use of the tunnel. Through on-site survey and shear test of Daxihe tunnel, the results show that the quality of the surrounding rock of the tunnel is good overall, and the phenomenon of large-scale landslip will not occur. However, due to the emergence of more lots of water seepage, cracking and falling blocks and other diseases, the need for remediation. This paper analyzes and summarizes the disease characteristics of unlined tunnels, and puts forward corresponding measures for the occurrence of disease in Daxihe Tunnel. It provides a reference for the selection of the treatment measures for unlined tunnels in similar areas.