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山西忻阜高速公路长城岭隧道为三车道长隧道,所处地质多为软弱片麻岩,洞口为浅埋段,且存在局部偏压,开挖断面超过160 m2。根据工况选择三台阶预留核心土施工工法,施工中坚持“明地质、管起前、严注浆、短进尺、强支护、早封闭、勤量测、速反馈”原则,降低了成本,加快了进度,且各项指标控制到位,没有发生安全、质量事故,对同类工程有借鉴意义。
The Great Wall Ridge Tunnel of Xin-Fu Expressway in Shanxi Province is a three-lane long tunnel, where the geology is mostly weak gneiss and the hole is shallow buried with partial bias and the excavation section exceeds 160 m2. According to the working conditions, three steps are reserved for the core soil construction method. During the construction, the principle of “clear geology before grouting, strict grouting, short ruler, strong support, early closure, diligence measurement and speed feedback” The cost, speed up the progress, and the various indicators in place, no safety, quality accidents, for similar projects have reference.