基于D-P准则三阶段蠕变模型的圆形隧洞黏弹塑性解  

Viscoelastic-plastic Solution for Circular Tunnels Based on the Three-stage Creep Model with the D-P Criterion

作　　者：陈福江 赖万松 刘金刚 佘伍越 曾锋 高美奔 刘国芯 CHEN Fujiang;LAI Wansong;LIU Jingang;SHE Wuyue;ZENG Feng;GAO Meiben;LIU Guoxin(School of Emergency Management,Xihua University,Chengdu 610039;Sichuan Transportation Construction Group Co.,Ltd.,Chengdu 610039;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071;National Dam Safety Engineering Technology Research Center,Wuhan 430010;Sichuan Provincial Key Laboratory of Civil Engineering Comprehensive Utilization of Industrial Solid Waste,Panzhihua 617000;China Railway Academy Co.,Ltd.,Chengdu 610032)

机构地区：[1]西华大学应急管理学院,成都610039 [2]四川省交通建设集团有限责任公司,成都610039 [3]岩土力学与工程国家重点实验室中国科学院武汉岩土力学研究所,武汉430071 [4]国家大坝安全工程技术研究中心,武汉430010 [5]“工业固态废弃物土木工程综合开发利用”四川省高校重点实验室,攀枝花617000 [6]中铁科学研究院集团有限公司,成都610032

出　　处：《现代隧道技术》2024年第4期105-111,118,共8页Modern Tunnelling Technology

基　　金：四川省哲学社会科学重点研究基地社会发展与社会风险控制研究中心2022年度项目(SR22A05);成都市哲学社会科学规划项目(2022CZ116);成都大学文明互鉴与“一带一路”研究分中心、天府文化研究院重点科研项目(WMHJTF2022B03);四川省农村发展研究中心项目(CR2214);四川省人力资源和社会保障厅2022年博士后研究专项资金(TB2022094);四川社会治安与社会管理创新研究中心项目(SCZA23B03);四川省哲学社会科学重点研究基地——社会治理创新研究中心项目(SHZLYB23013);岩土力学与工程国家重点实验室开放基金课题(SKLGME022017);国家大坝安全工程技术研究中心开放研究基金(CX2023B02);2022年四川特色哲学社会科学规划项目(SC22ST11);四川省高等学校重点实验室资金项目(SC_FQWLY-2022-Y-03).

摘　　要：围岩的流变特性对隧道结构的长期变形有重要的影响。为了较好地描述圆形隧道开挖后围岩的黏弹塑性力学行为,采用分数阶蠕变模型描述围岩的流变特征,采用Drucker-Prager准则表征围岩的塑性特征,推导圆形隧道开挖后考虑支护支撑效应的围岩应力-位移理论解。通过具体算例,分析围岩流变参数对黏弹性塑性变形的影响。结果表明:(1)解析得到的围岩蠕变位移曲线与现场实测结果平均值曲线吻合较好,证明理论推导具有正确性;(2)当考虑黏塑性区围岩的剪胀效应时,围岩的变形值增加。剪胀效应越明显,围岩变形值增加的量值越大;(3)当黏弹性体或黏塑性体的黏性增强时,围岩的蠕变位移量值和速率都会相应增加。The rheological properties of surrounding rock significantly influence the long-term deformation of tunnel structures.To better describe the viscoelastic-plastic mechanical behaviors of the surrounding rock after circular tunnel excavation,a fractional-order creep model is used to characterize the rheological properties,and the Drucker-Prager criterion is used to represent the plastic characteristics of the surrounding rock.The theoretical solution of the stress-displacement of the surrounding rock,considering the support effect after circular tunnel excavation,is derived.Through specific examples,the influence of rheological parameters on viscoelastic-plastic deformation of the surrounding rock is analyzed.The results show that:(1)The creep displacement curve of the surrounding rock obtained analytically matches well with the average curve of field measured results,proving the correctness of the theoretical derivation;(2)When the dilatancy effect of the surrounding rock in the viscoplastic zone is considered,the deformation value of the surrounding rock increases.The more pronounced the dilatancy effect,the greater the increase in the deformation value of the surrounding rock;(3)When the viscosity of the viscoelastic or viscoplastic body increases,the creep displacement value and rate of the surrounding rock also increase accordingly.

关 键 词：三阶段蠕变模型 D-P准则 深埋隧道 黏弹塑性位移解 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]