Prediction of Ground Surface Movements Due to Shield Tunneling with Tail Grouting Heave
LIN Cungang,WU Shiming,ZHANG Zhongmiao,LIU Guanshui and LI Zongliang
DOI:10.3969/j.issn.1674-4764.2012.06.014
Received ,Revised , Accepted , Available online July 01, 2015
Volume ,2012,Pages 80-88
- Abstract
Compared with conventional tunneling methods, ground movements behave some different patterns, such as surface heave induced by tail grouting. Through the analysis of ground surface heave due to tail grouting in three cases, the applicability of Gaussian equation and six analytic methods (including Mindlin's problem, Sagaseta method, Verruijt-Booker method, Loganathan-Poulos method, Chi method and Park method) to predict ground surface heave induced by tail grouting were verified. Based on case studies, one modified Peck equation was proposed to calculate ground surface movements, including grouting heave due to shield tunneling. The results show that the Gaussian equation and Chi method are applicable to calculate surface heave due to shield tail grouting, and the Modified Peck Equation can predict the total transversal ground surface movements rationally.