Slurry shield,Deformation of soil mass,Ground loss,Modified formula for the GAP parameter," /> On the Modification of the Ground Loss Parameter GAP for Large-Diameter Slurry Shield Tunnelling and its Application
 
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MODERN TUNNELLING TECHNOLOGY 2013, Vol. 50 Issue (5) :92-87    DOI:
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On the Modification of the Ground Loss Parameter GAP for Large-Diameter Slurry Shield Tunnelling and its Application
(1 Civil Engineering and Transportation Institute of Hohai University, Nanjing 210098;
2 College of Architecture and Civil Engineering, North China University of Technology, Beijing 100144;
3 Jiangyin People's Government Key Project Construction Office, Jiangyin 214400 )
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Abstract  The fact of large-diameter slurry shield construction related to problems of high ground losses (causedby low cutting face pressures and high grouting pressures) is not sufficiently considered in transverse settlement trough theory. Therefore, a modified formula for the GAP parameter is proposed. Using the construction of the Chengjiang west road river-crossing tunnel in Jiangyin City as an example, a modified GAP parameter was incorporated into the modified Peck formula and the analytical solution based on the Sagseta theory in order to study the influence of large-diameter slurry shield construction on soft soil. It was verified that due to the equivalent ground losses caused by factors such as construction quality, under-pressure of the cutting face, and and high grouting pressures, calculated settlements are larger, but are more consistent with the measured data and more reasonable theoretically.
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Abstract：  The fact of large-diameter slurry shield construction related to problems of high ground losses (causedby low cutting face pressures and high grouting pressures) is not sufficiently considered in transverse settlement trough theory. Therefore, a modified formula for the GAP parameter is proposed. Using the construction of the Chengjiang west road river-crossing tunnel in Jiangyin City as an example, a modified GAP parameter was incorporated into the modified Peck formula and the analytical solution based on the Sagseta theory in order to study the influence of large-diameter slurry shield construction on soft soil. It was verified that due to the equivalent ground losses caused by factors such as construction quality, under-pressure of the cutting face, and and high grouting pressures, calculated settlements are larger, but are more consistent with the measured data and more reasonable theoretically.
Keywords：  Slurry shield')" href="#">     
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.On the Modification of the Ground Loss Parameter GAP for Large-Diameter Slurry Shield Tunnelling and its Application[J]  MODERN TUNNELLING TECHNOLOGY, 2013,V50(5): 92-87
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