浅埋大断面公路黄土隧道下穿古文物遗址沉降监测与控制

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。

MONITORING AND SETTLEMENT CONTROL OF ANCIENT CULTURAL RELIC SITE OF SHALLOW TUNNELLING WITH LARGE SECTION IN LOESS

An ancient cultural relic ruins was explored in the way of a planned expressway,so a tunnel has to be designed underneath to prevent the ruins from damages. But the ground settlement control of the site become a real challenge for the soil( only 4 m thick). A three pilot tunnel method was taken. The settlement law was summarized while tunneling beyond the ruins and based on which the construction parameter was optimized to minimize the subsidence. The new method was used to tunnel under the ruins and the settlement was controlled within reasonable range. The cultural relic was protected effectively.