Quantitative Deviation Correction Technologies for Subway Shield Tunnels in Operation through Compaction Grouting
(1. Urban Rail Transit Design and Research Institute, China Railway Engineering Design and Consulting Group Co., Ltd., Beijing 100055; 2. China Railway Design Corporation, Tianjin 300308; 3. School of Civil and Traffic Engineering, Shenzhen University,Shenzhen 518060)
Abstract：
To address the problem of deviations in subway shield tunnels in operation caused by surrounding con? struction projects, this paper puts forward a quantitative grouting correction method. Through the theoretical study and finite element analysis of the compaction grouting process, the study focuses on the deviation correction mechanism of compaction grouting on the shield tunnel, obtains the key parameters, and establishes the theoretical model and calculation formulae for the vertical and horizontal displacements of the shield tunnel under the action of grouting. The analysis results show that the compaction grouting in the strata can effectively correct the displacement and deformation that have occurred in subway shield tunnels in operation, which can be simulated by using the volume strain method for compaction grouting. The tunnel displacement can be calculated by the layered summation method, and the main control factors of the correction effect are the grouting distance, grouting pressure, and grouting range. By comparing the results of field tests and calculation formulae, the theoretical model put forward by this paper is proved reasonable with credible conclusions.
WU Ze1 GU Fulin2 FU Yanbin3
.Quantitative Deviation Correction Technologies for Subway Shield Tunnels in Operation through Compaction Grouting[J] MODERN TUNNELLING TECHNOLOGY, 2023,V60(2): 185-193
2023, Vol. 60 