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主要论述对杭新景高速公路SJB5合同段大门口隧道进口段严重浅埋偏压问题的处理和施工方案,及暗洞上下台阶法的开挖掘进方法。
Mainly deals with the treatment and construction scheme of severe shallow bias at the entrance of tunnel entrance of SJB5 contract section of Hangzhou-Xinjing Expressway and the excavation method of underground steps of dark hole.