摘要
针对富水地区地铁开挖过程中的多场耦合问题,目前的数值计算方法还存在一定的不足。为更好地反映应力-渗流-损伤耦合作用对地铁开挖的影响,首先,以前人提出的Hoek-Brown弹塑性损伤模型为基础,给出岩体应力场控制方程以及岩体渗流场的控制方程,并引入岩体不同状态下(弹性、塑性、破坏状态)的渗透性演化方程;然后,建立基于Hoek-Brown准则的岩体弹塑性应力-渗流-损伤耦合模型,并二次开发UMAT子程序并应用于ABAQUS模拟计算;最后,将计算结果与室内试验对比,验证了该模型的科学性,其可以有效地完善ABAQUS在HMD耦合计算上的不足。将该模型应用于大连地铁5号线开挖过程分析,有效反映了地铁施工过程中地下水对围岩及支护稳定性的影响规律。
The current numerical methods for addressing multifield coupling issues during metro construction in water-rich areas have certain limitations.To better reflect the impact of stress-seepage-damage coupling on metro construction,control equations for the rock stress field and seepage field are provided based on the Hoek-Brown elastoplastic damage model from previous research,and permeability evolution equations for different rock states(elastic,plastic,and failure)are given.Then,an elastoplastic stress-seepage-damage coupling model based on the Hoek-Brown criterion is established,and a User-defined Material subroutine is developed for application of ABAQUS simulation calculation.Finally,the simulation results are compared with laboratory test to validate the applicability of the model,this can improve ABAQUS′s deficiencies in hydraulic-mechanical-damage coupling calculations.The model is applied to the construction process analysis of the Dalian metro line 5,which can effectively reflect the influence of groundwater on the stability of surrounding rock and support structures during metro construction.
作者
宋宏倬
姜谙男
阮颖颖
闵庆华
SONG Hongzhuo;JIANG Annan;RUAN Yingying;MIN Qinghua(Transportation Management College,Dalian Maritime University,Dalian 116026,Liaoning,China;Jiujiang Municipal Party School,Jiujiang 332001,Jiangxi,China;China Construction Communications Construction Group Co.,Ltd.,Beijing 100000,China)
出处
《隧道建设(中英文)》
CSCD
北大核心
2024年第S2期342-351,共10页
Tunnel Construction
基金
国家自然科学基金(52078093)
兴辽英才计划(XLYC1905015)
江西省高层次高技能领军人才培养工程人选项目。
