基于位移反分析的围岩蠕变本构模型参数确定方法  

THE METHOD OF THE CREEP CONSTITUTIVE MODEL PARAMETER DETERMINATION BASED ON DISPLACEMENT BACK ANALYSIS

作　　者：陈驰 万旺 蹇宜霖 CHEN Chi;WAN Wang;JIAN Yilin(CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430056,China)

机构地区：[1]中交第二公路勘察设计研究院,武汉430056

出　　处：《低温建筑技术》2021年第1期121-124,129,共5页Low Temperature Architecture Technology

摘　　要：针对隧道围岩蠕变参数难以确定的研究现状,在充分调研各类岩石蠕变本构方程的适用条件的基础上,选取适用于依托工程实际地质状况的蠕变本构方程。采用位移反分析的计算方法,根据现场调查所得隧道围岩监控量测数据进行参数反演,得到了典型断面所在围岩段的围岩蠕变本构方程,并进行了参数验证,结果显示计算模型所得围岩变形值与实测数据误差较小,说明了本构方程的可靠性。该计算方法思路清晰,操作简便,较为准确地反映了岩石的蠕变过程,以期对岩石蠕变参数的确定方法产生一定的参考价值。Considering the research status that it is difficult to determine the creep parameters of tunnel surrounding rock,this paper select the creep constitutive equations of various rocks on the basis of fully investigating the applicable conditions of creep constitutive equations of various kinds of rocks.By using the calculation method of displacement back analysis,parameter inversion is carried out according to the monitoring data of tunnel surrounding rock.And the creep constitutive equation of the surrounding rock in the typical section is obtained,and the parameter verification is also conducted.The results show that the error between the calculated model and the measured data is small,which indicates the reliability of the constitutive equation.The calculation method is clear in thought,simple in operation,and accurately reflects the creep process of rock,so as to provide some reference value for the determination of creep parameters of rock.

关 键 词：反分析 岩石蠕变 本构模型 蠕变参数 

分 类 号：TU454[建筑科学—岩土工程]