doi:10.16186/j.cnki.1673-9787.2020.5.24

Received:2019/12/25

Revised:2020/02/21

Published:2020/09/15

Stress and displacement of surrounding rock of rectangular tunnel inlayered stratum

LIU Dengkai1, RAO Junying1, XU Shijun2, XIE Caijin1, NIE Chongxin1

1.School of Civil Engineering, Guizhou University, Guvyang  550025，Guizhou，China;2.China Railway 18th Bureau Group Second Engineering Co. ，Ltd. ，Tangshan  063000，Hebei，China

Abstract:In order to theoretically solve the problem of stress and displacement of tunnel surrounding rock in layered stratum， based on the theory of the HoKpoBCKRK equivalent layer method， the layered strata were cib-verted into homogeneous strata, then the rectangular tunnel in the coordinate plane z was mapped to the unit circle of the complex planeζ by using complex variable method. For shallow buried tunnels，was mapped the method of calculating its stress and displacement was described. For the deep-buried tunnel， by calculating the analytic function Φ(ζ) and Ψ(ζ) with Matlab softwar，the stress of surrounding rock of deep-buried rectangular tunnel in layered strata was obtained，then the strain and the displacement of surrounding rock was obtained. Finally，the effects of lateral pressure coefficient of surrounding rock，boundary force and ratio of height to width of the tunnel on the stress of surrounding rock of the tunnel were obtained.

Key words:layered stratum;surrounding rock of tunnel;complex variables function;stress of surrounding rock;displacement of surrounding rock

层状地层中矩形隧洞围岩应力及位移_刘灯凯.pdf