Study on the Stability of the Formation of Rectangular Pipe Jacking under Fluid-Solid Coupling
In order to study the influence of pipe jacking construction on foundation stability based on the principle of fluid-solid coupling,a pipe jacking tunnel under construction in Hefei is taken as the background,combined with the monitoring data of pipe jacking construction,and a three-dimensional numerical model of pipe jacking construction is established by Midas GTS NX software,and the seepage and displacement fields around the tunnel under the effect of fluid-solid coupling under different working conditions are analyzed.The analysis shows that with the excavation of the tunnel,the pore water pressure around the tunnel decreases significantly,the surface settlement value is superimposed by the excavation disturbance and reaches the maximum value above the tunnel axis,and the surface settlement is aggravated by the seepage of water from the groundwater,and the maximum settlement value of the surface decreases with the increase of the height of the initial level of the water from the ground surface.The findings can provide theoretical reference for similar construction to ensure the safe-ty of construction.
top pipefluid-solid couplingsurface settlementnumerical simulation
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