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JMT 2011, Vol. 19 Issue (1) :35-41    DOI: 10.3969/j.issn.2095-087X.2011.01.006
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Strata consolidation subsidence induced by metro tunneling in saturated soft clay strata
Taiyue QI, Bo GAO*
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

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Abstract To choose the optimum construction method of metro tunneling,we conducted research with numerical simulation on strata consolidation subsidence by dewatering,dynamic dewatering,and non-dewatering construction method,taking the integrated effects of fluid-solid coupling and tunneling mechanics into account.We obtained the curved surfaces of ground surface subsidence and strata consolidation subsidence.The results show that the quantity of ground surface subsidence is 31 mm for the non-dewatering method,39 mm for the dynamic dewatering method,and 105 mm for the dewatering method.Their ratio is 1:1.3:3.4;and the percentages of strata consolidation subsidence to whole ground surface subsidence of each construction method is 27(no-dewatering),50(dynamic dewatering),and 79(dewatering).It is obvious that the non-dewatering construction method is the most effective method to control the strata consolidation subsidence induced by metro tunneling in saturated soft clay strata,and it has been successfully applied to the construction of the Shenzhen metro line 1.
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Taiyue QI
Bo GAO
Keywordsmetro tunnels   ground surface subsidence   strata loss   strata consolidation subsidence   fluid-solid coupling     
Received 2010-09-13;
Cite this article:   
Taiyue QI, Bo GAO.Strata consolidation subsidence induced by metro tunneling in saturated soft clay strata[J]  JMT, 2011,V19(1): 35-41
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http://jmt.swjtu.edu.cn/EN/10.3969/j.issn.2095-087X.2011.01.006      or     http://jmt.swjtu.edu.cn/EN/Y2011/V19/I1/35
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