炭质板岩三轴压缩蠕变特性及其本构模型  

Creep Characteristic of Carbonaceous Slate and Its Constitutive Model Under Triaxial Compression

作　　者：王永刚[1,2,3] 丁文其[1,2] 王者超[4] 宗智[4] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092 [3]甘肃省交通规划勘察设计院股份有限公司,甘肃兰州730030 [4]山东大学岩土与结构工程研究中心,山东济南250061

出　　处：《东北大学学报（自然科学版）》2017年第4期586-590,共5页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2012AA112502);国家重点基础研究发展计划项目(2014CB046905);国家自然科学基金青年基金资助项目(41202205;51309145)

摘　　要：采集兰渝铁路木寨岭隧道炭质板岩制备试样,开展了三轴蠕变试验,研究了不同层理面与轴向荷载夹角下的试样蠕变特性.根据试验结果提出了岩石横观各向同性蠕变本构模型,由于炭质板岩性质的方向性,其蠕变势函数与常规势函数相比需要更多的参数.此外,结合试验数据开展了蠕变参数反分析研究,可以减少蠕变试验数目,在工程应用中具有一定优势.研究结果为了解岩石横观各向同性和制定相关地层支护方案提供了科学依据.Triaxial compression creep tests were performed on carbonaceous slate samples obtained from Muzhailing tunnel of Lanzhou-Chongqing railway in order to understand the creep characteristics of carbonaceous slate with different angle between bedding planes and axial load.Based on the test results,a creep model was proposed to describe the transversely isotropic creep behavior of the carbonaceous slate,which needs more parameters in the creep potential function to describe the transversely isotropic creep behavior than in the conventional potential function.A method for the determination of creep parameters was developed using back analysis,which is helpful in reducing the number of creep tests needed to determine the creep parameters and is applicable in practice.This study contributes to the understanding of the transversely isotropic behavior of rocks and to the design of the lining system in the transversely isotropic stratum.

关 键 词：炭质板岩 横观各向同性 蠕变性质 蠕变模型 参数反分析 层理面 

分 类 号：TU45[建筑科学—岩土工程]