铁山隧道病害治理技术

TECHNIQUES FOR TREATMENT OF DISASTERS IN TIESHAN TUNNEL

巴彭公路铁山隧道位于四川省达川市境内 ,铁山大河沟西北 6 6°,全长 2 0 99m,由于受煤层采空区、地下水及软弱围岩等因素的影响 ,致使 K1 4 0 +5 2 7～ +6 0 8段二次衬砌出现开裂、错台、掉块、钢筋弯曲、剪断 ,水沟边墙出现断裂、渗水 ,危及到行车安全 ,被迫关闭交通 ,进行病害整治。病害整治的方法为 ,对隧道围岩及其采空区进行注浆加固后 ,拆除病害严重段的二次衬砌及其仰拱、路面 ,重新施作钢筋混凝土结构 ,而对一般病害段则施作钢筋混凝土套衬进行补强。本文介绍了铁山隧道病害整治技术。

The Tieshan Tunnel of Ba Peng highway is Situated in Dachuan city of Sichuan province with a total length of 2 099 m at 66° northwest of the Tieshan valley. Due to several influence factors, such as the coal mining subsidence, groundwater, weak surrounding rock, etc, disasters occurred in the K140+527～+608 section. The disasters in this section included the crack, broken bench cut and rock mass falling of the secondary lining, the bending and shearing break of the reinforcement, and the cracking and leakage of side wall nearby wate channel. These disasters endangered the safety running, the communication was interrupted, and the repairing works were put forward. The repairing methods are introduced mainly in this paper as follows: after reinforcing by grouting for the surrounding rock of the tunnel and its mining subsidence region, the secondary lining and its inverted arch,the pavement in serious disaster sections were demolished and the reinforced concrete structures were reconstructed again; in the other hand, the reinforced concrete casing linings were reconstructed for consolidation in general disaster sections.