二道井子隧道以浅埋、大跨(连拱)的黄土隧道近距离(最薄处仅4 m)下穿夏家店珍贵文化遗址,这对文物的保护提出了极高的要求。采用三导洞法施工,在洞口试验段沉降规律分析的基础上,进行了工艺优化,在穿越段施工中有效地指导了施工并最终将沉降控制在合理的范围内。最大限度地保护了文物的原貌。监测数据和沉降控制措施可为今后类似工程的设计、施工和工程研究提供借鉴和参考。 The Erdaojing tunnel passes Xiajiaodian precious cultural sites at shallow distance (only 4 m at the thinnest place) at shallow and long-span (even arch) loess tunnels, which places extremely high demands on the protection of cultural relics. Based on the analysis of settlement rule in the test section of Dongkou, the three-pilot tunneling method was used to optimize the process. The construction was effectively guided in the construction of the crossing section and the settlement control was finally controlled within a reasonable range. To maximize the protection of the original appearance of cultural relics. Monitoring data and settlement control measures can provide reference and reference for the design, construction and engineering researches of similar projects in the future.