期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2020
卷号：510
期号：5
页码：1-5
DOI：10.1088/1755-1315/510/5/052039
语种：English
出版社：IOP Publishing
摘要：In the construction of most double-tunnel subways and postexcavation tunnels, settlement deformation is an important problem. In this study, we analyzed the problem using monitoring data from the Huai'anqiao-Xisanjiao section (an anhydrous sand layer) of the first phase of China's Shijiazhuang Rail Transit Line 3 project. First, FLAC3D software was used to establish a numerical model. Grouting pressure was assumed to be uniformly distributed. The settlement value of a measured point was calculated as the test data, and the range of the correction factor was obtained by an influence coefficient formula. The correction factor was revised in accordance with the measured data, and the correction factors for the properties of Shijiazhuang sand were obtained. For the first tunnel measuring point, the correction factor was –0.2; for the rear of the tunnel point the correction factor was 0.2. Finally, different numerical models were established, and the influence on the correction factor of such factors as tunnel depth and horizontal spacing, slope ratio, and tunnel spacing were established by using a control variable method.
