Pipe-Soil Contact State and Jacking Force Prediction of Rectangular Pipe Jacking

doi:10.12068/j.issn.1005-3026.2020.10.015

Abstract

Abstract: The experience of rectangular pipe jacking for exit and entrance of metro station in Tianjin is limited， especially for pipes with large diameter. Considering the factors such as stoppages， pipe buoyancy and lubrication volumes， a jacking force calculation model of the coupled finite difference method and jacking force-jacking path control method was proposed and applied to the estimation of jacking force of rectangular pipe jacking. In view of the stratum situation in Tianjin， this model was used to estimate the jacking force in the construction of pipe jacking at the entrance and exit of metro stations. The field test and monitoring data proved the correctness of the jacking force prediction model. It is helpful for the design optimization of the back wall of the jacking working well and the layout of the long-distance large-diameter jacking construction relay room.

Key words: rectangular pipe jacking, interface, jacking force prediction, drag reduction, numerical simulation

CLC Number:

TU921

JIAO Cheng-long， ZHAO Xin， NIU Fu-jun. Pipe-Soil Contact State and Jacking Force Prediction of Rectangular Pipe Jacking[J]. Journal of Northeastern University Natural Science, 2020, 41(10): 1459-1464.

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