Stability Analysis and Support Research of Shallow Buried Double-hole Tunnel on Underpass Highway
In order to explore the stability of the surrounding rock and the efficiency of the supporting structure during the excavation of the highway through the tunnel,this paper uses the three-dimensional numerical simulation software to carry out a comparative study of the working conditions with or without support.The main results are as follows:(1)under the condition of no support,the deformation of the surface road increases from 2.34mm to 3.7mm when the excavation of the double hole is complete,and the excavation of the right hole has little influence on the horizontal displacement deformation of the left hole,but the plastic zone at the foot of the left arch of the left hole changes significantly;(2)under the condition of support,the deformation of the surface road increases from 0.73mm to 1.3mm when the excavation of the double hole is complete,and the influence of tunnel excavation disturbance on the road is reduced by an order of magnitude under the support design,which effectively controls the settlement of the surface.
highway engineeringtunnel underpassinitial supportnumerical simulationsupport control
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