标题：Effect analysis of grouting reinforcement ring considering fluid solid coupling
作者：Zhou, Heng ;Wang, Xiaochen ;Liu, Haojie ;Liu, Yanan ;Ma, Chenyang ;Li, Kexian
作者机构：[Zhou, Heng ;Wang, Xiaochen ;Liu, Haojie ;Liu, Yanan ;Ma, Chenyang ] College of Civil Engineering and Water Conservancy of Shandong University, Jinan; 更多
会议名称：2018 International Joint Conference on Metallurgical and Materials Engineering, JCMME 2018
会议日期：December 10, 2018 - December 12, 2018
来源：MATEC Web of Conferences
摘要：Geological hazards such as instability of surrounding rock and leakage of water are easily occurred in subway tunnels crossing water rich sand layers. Based on the principle of fluid solid coupling in porous media, this paper studies the plastic zone distribution of surrounding rock and reinforcement ring, vertical settlement of tunnel vault and water seepage of tunnel before and after grouting reinforcement for water rich sand layer. Considering the compressibility of rock mass, the relationship between porosity, permeability and volume strain is further deduced and simplified. A set of numerical calculation formula is set up to study the change of physical parameters of the water rich sand layer before and after grouting to determine the grouting effect and select the thickness of the best grouting reinforcement ring. The results show that the deformation and water permeability of the tunnel decrease with the increase of the thickness of the grouting reinforcement ring. The thickness of the grouting reinforcement ring is the most reasonable when the thickness of the reinforcing ring reaches a certain value, and the thickness of the grouting reinforcement ring is designed to be 5~6m. The research results have been successfully applied in the grouting project of Qingdao Metro stone elderly bathing beach. The reliability of the numerical simulation is verified by comparing the data from the field monitoring and measurement, providing reference for the related projects.
© The Authors, published by EDP Sciences, 2019.