109号隧道地震灾害与加固处理的思考

Our Reflection on the Earthquake Damage to the No.109 Tunnel and Our Consolidating Treatment

针对宝成铁路109隧道地震灾害情况,分析了导致原因,区分109隧道不同区段受损程度的差异,介绍了采取的凿除后断面修复、开裂压注、内衬等加固措施。专家评估认为:抢险加固后的隧道,在过渡使用期内,围岩稳定、结构安全、洞口山体稳定。109号隧道灾后的抢险与抢修,为快速开通货物列车和恢复客运列车创造了条件。

With the earthquake damage to the No. 109 Tunnel of the Bao-Cheng Railway as a practical example, the causes of the damage are analysed in the paper, with the different degrees of damage to the different sections of the tunnel distinguished, and different consolidating measures taken respectively for different sections, such as the repair of the fracture surface after it is initially chiseled, slip-casting into the cracked sections, and internal consolidation. After being evaluated by experts, the so rush-repaired and consolidated sections of the tunnel is found, within the period of transitional use, stable in its surrounding rock, safe in its structure, and the mountain bodies at both of its inlet and outlet openings are found stable. The successful rush-repair and conslidation of the earthquake-striken No. 109 Tunnel lays a good foundation for the quick-starting of freight train transportation and the restoration of passengers trains.