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MODERN TUNNELLING TECHNOLOGY 2015, Vol. 52 Issue (3) :63-68    DOI:
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A Study of the Interaction Between the Pipes of a Curved Pipe-Roof
(1 Guangdong Nanyue Transportation Investment & Construction Co. Ltd., Guangzhou 510101; 2 Zhuhai Link Management Center of HongKong-Zhuhai-Macao Bridge Project, Zhuhai 519030)
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Abstract Compared with straight pipe-roof jacking construction, curved pipe-roof jacking is more difficult with respect to accuracy control, interaction between pipes and pipe-roof formation. Using the curved pipe-roof jacking of the Gongbei tunnel of the Hong Kong-Zhuhai-Macao Bridge as an example, the interaction between the pipes of a curved pipe-roof is studied using a model test, a numerical simulation and an in-situ test, and the laws and characteristics of the effects of pipe-jacking on the cumulative disturbance of the soil, soil strain, contact pressure between the pipe and soil and the jacking path are analyzed. The results show that: 1) in the process of pipe jacking, the ground surface uplifts and the transverse and longitudinal soil strain increases in front of the jacking machine; 2) the variation laws of soil displacement and strain obtained by the model test are almost consistent with the numerical simulation results; and 3) with the help of effective jacking parameter controls and appropriate construction measures, the interaction between the pipes of a curved pipe-roof can be effectively reduced and controlled by timely measuring and correcting the jacking deviation to ensure successful formation of the pipe-roof.
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LI Zhi-Hong-1
Li
JIAN 2
KeywordsCurved pipe-jacking   Pipe-roof   Interaction   Model test   Numerical simulation     
Abstract: Compared with straight pipe-roof jacking construction, curved pipe-roof jacking is more difficult with respect to accuracy control, interaction between pipes and pipe-roof formation. Using the curved pipe-roof jacking of the Gongbei tunnel of the Hong Kong-Zhuhai-Macao Bridge as an example, the interaction between the pipes of a curved pipe-roof is studied using a model test, a numerical simulation and an in-situ test, and the laws and characteristics of the effects of pipe-jacking on the cumulative disturbance of the soil, soil strain, contact pressure between the pipe and soil and the jacking path are analyzed. The results show that: 1) in the process of pipe jacking, the ground surface uplifts and the transverse and longitudinal soil strain increases in front of the jacking machine; 2) the variation laws of soil displacement and strain obtained by the model test are almost consistent with the numerical simulation results; and 3) with the help of effective jacking parameter controls and appropriate construction measures, the interaction between the pipes of a curved pipe-roof can be effectively reduced and controlled by timely measuring and correcting the jacking deviation to ensure successful formation of the pipe-roof.
KeywordsCurved pipe-jacking,   Pipe-roof,   Interaction,   Model test,   Numerical simulation     
published: 2014-12-11
Cite this article:   
LI Zhi-Hong-1, Li, JIAN 2 .A Study of the Interaction Between the Pipes of a Curved Pipe-Roof[J]  MODERN TUNNELLING TECHNOLOGY, 2015,V52(3): 63-68
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