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中文摘要：
为了确保施工安全,为高含水量黄土隧道施工提供准确及时的隧道变化情况,现以宝兰客运专线上某高含水量黄土隧道为工程背景,首先对隧道CRD开挖过程进行有限元数值模拟,然后通过现场监测数据,研究了拱顶下沉、周边位移等参数随时间变化的规律及分布特征,并且分别对现场实测数据进行了回归分析.结果表明：拱顶下沉、周边位移时程曲线都是呈阶梯形,比较符合隧道CRD开挖的一般规律;通过回归分析可知幂函数的相关系数最大;通过有限元数值模拟可知竖向的位移主要集中在拱顶、右拱肩和仰拱以下的竖直区域,周边位移主要集中在拱腰与拱脚附近,并且模拟计算结果与实测结果基本吻合.
英文摘要：
In order to ensure the construction safety and to provide the accurate and timely change of the tunnel for the tunnel construction in loess of high water content, the finite element numerical simulation is carried out on CRD excavation process of the tunnel based on the engineering project of a high water content loess tunnel on Baoji-Lanzhou Passenger Dedicated Lines （PDL）. The law of the parameters varied with time and distribution characteristics, such as vault sink, displacement of the surrounding, is studied by the field monitoring data. And the regression anal- ysis of field measured data is presented. The result shows that time history curve of the vault sink and the displacement of the surrounding is in stepped shape, which is in line with the general rules of the CRD excavation tunnel. The regression analysis shows that the correlation coefficient of power function is the largest. The finite element numerical simulation shows that vertical displacement ise mainly concentrated in the vault, the right spandrel and the following vertical areas of inverted arch, and the displacement of the surrounding is mainly concentrated near the arch waist and arch foot. The simulation result agrees with the measured result.
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