Numerical Computational Study of the Impact of Concealed Tunnels on Proximity Cable Tunnels
For the crack damage problems caused by the subway tunnelling construction on the cable tunnel lining structure,the finite difference software is used to simulate the different working conditions of the cable tunnel orthogonal to the tunnelling tunnel.The settlement value of the cable tunnel is extracted and fitted as the displacement load,and the load-structure model is established by using the ABAQUS finite element software to load the displacement load onto the lining structure which adopts the Cohesive zone model to simulate the cracks sprouting and developing.Cohesive zone model lining structure to simulate the cracks sprouting and develop-ment.The results are as follows:Under the working condition of the cable tunnel,the secondary lining plate of the cable tunnel is mainly affected by the tensile stress,and the maximum stress generated by the crack initiation and expansion of the lining plate of the cable tunnel is related to the vertical distance between the tunnels and the cross-section size of the cable tunnel.The geometric characteristics of the cracks generated in the cable tunnel were analyzed under the condition of orthogonal underpassing of cable tunnel in the concealed tunnel,and the width,length and depth of the cracks were linearly related to the section size and clear distance of the cable tunnel.
cable tunnelorthogonal underpassCohesive zone modelgeometric characteristics of cracks
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