Numerical Simulation of Soil Deformation During Jacking of Circular Steel Pipes with Flange Plates

doi:10.12068/j.issn.1005-3026.2023.10.016

Abstract

Abstract: In the traditional pipe curtain construction， two steel plates， known as flange plates， are welded on both sides of the original circular steel pipe， creating a circular steel pipe with flange plates. Adjacent steel pipe with flange plates are welded together to form a new pipe curtain structure. The presentence of the flange plate cause the soil deformation law during jacking process to differ from that of circular steel pipes. In this study， Midas GTS finite element analysis software was used to simulate the jacking process of circular steel pipes with flange plates of different pipe diameters and flange plate positions. The results show that the soil settlement at the pipe top， the soil uplift at the bottom of the pipe， and the vertical displacement of the soil at the flange plate increase continuously with an increase in the spacing between the upper and lower flange plates or an increase in pipe diameter. When the top excavation surface is one section length away from the monitoring section， soil uplift occurs at the monitoring section position. When the top reaches the monitoring section position， the soil deformation becomes settlement. When the top position exceeds one section length of the monitoring section， the soil deformation tends to stablize. Meanwhile， the functional relationship between soil deformation and spacing between upper and lower flange plates， as well as pipe diameter， is obtained by fitting the curve.

Key words: circular steel pipe with flange plates; pipe jacking; numerical simulation; soil deformation; Midas GTS

CLC Number:

U452

ZHAO Wen， WANG Zhi-guo， WANG Zhao-peng， WANG Xin. Numerical Simulation of Soil Deformation During Jacking of Circular Steel Pipes with Flange Plates[J]. Journal of Northeastern University(Natural Science), 2023, 44(10): 1490-1498.

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