WANG G, GUAN H, WANG P J, et al.Elastoplastic solutions of deep-buried circular tunnels under the coupled effect of seepage damage[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(6):173-181.

doi:10.16186/j.cnki.1673-9787.2022040016

Received:2022/04/07

Revised:2022/06/30

Published:2023/11/25

Elastoplastic solutions of deep-buried circular tunnels under the coupled effect of seepage damage

WANG Gang1,2, GUAN Hui1,2, WANG Pengju1,2, YUAN Wenpeng1,2, ZHANG Shubo1,2, HE Peng1,2, CHEN Huiyuan1,2, LIU Tingfang1,2

1.College of Civil Engineering，Shandong University of Science and Technology，Qingdao  266590，Shandong，China;2.Shandong Provincial Key Laboratory of Civil Engineering，Disaster Prevention and Mitigation，Shandong University of Science and Technology，Qingdao  266590，Shandong，China

Abstract:In order to study the elastoplastic solution of deeply buried circular tunnels considering seepage damage coupling factors，this paper selects the Drucker-Prager yield criterion and deduces elastoplastic solution of deeply buried circular tunnels with lining support in the stages of construction and operation based on the Biot effective stress principle.Moreover，the formulas of plastic radius and lining surrounding rock stress are deduced，and the effects of different factors on plastic radius and lining surrounding rock stress are analyzed the formulas for the plastic radius and lining surrounding rock stress are given.The results show that：in the construction stage，the surrounding rock damage promotes the expansion of the plastic zone，at the same time，the plastic radius is positively correlated with the seepage force，and the hoop stress appears abruptly at the junction of the lining and the surrounding rock and finally tends to the crustal stress.In the operation stage，the plastic radius and the damage factor show a linear increase，and show a negative correlation trend with the seepage force.The effect of internal pressure on the plastic radius is divided into five stages.With the further increase of internal pressure，the plastic radius can be divided into five stages：low internal pressure stage，medium-low internal pressure stage，first high internal pressure stage，second high internal pressure stage，and high internal pressure stage.The above results provide guidance and help for the construction of deep-buried circular tunnel engineering.

Key words:circular tunnel;Drucker-Prager yield criterion;seepage damage coupling;lining support;elastoplastic solution

022_2022040016_王刚_L.pdf