In Situ Study on Soil Disturbance Induced by Shield Tunneling in Tianjin

Yong Hua Cao; Xiao Qiang Kou

doi:10.4028/www.scientific.net/AMM.368-370.1674

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 368-370In Situ Study on Soil Disturbance Induced by...

In Situ Study on Soil Disturbance Induced by Shield Tunneling in Tianjin

Abstract:

In urban environment, the soil disturbance induced by shield tunneling can be sensitive because it can cause deformation of the ground and damage the near structure. To study this disturbance in the construction process of Tianjin metro line No.3, in-situ monitoring of pore water pressure, soil pressure and ground settlement were conducted. The pore water pressure was monitored for the soil around the tunnel. The soil pressure was monitored for the soil around the tunnel and on the tunnel face. It was revealed that the pore water pressure and soil pressure changed twice in the tunneling process and these changes were induced by cutting face and grouting at the shield tail. The soil pressure on the tunnel face reached its maximal value when the distance between the cutting face and the sensor elements was around the diameter of the tunnel. Ground settlement developed in the tunneling process. The shape of ultimate settlement trough is closed to the one obtained by Pecks method.

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Periodical:

Applied Mechanics and Materials (Volumes 368-370)

Pages:

1674-1677

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.368-370.1674

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Online since:

August 2013

Authors:

Yong Hua Cao, Xiao Qiang Kou

Keywords:

In Situ Study, Monitoring, Shield Tunnel, Soil Disturbance

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