深埋长大隧洞围岩非线性蠕变模型研究

›› 2011, Vol. 32 ›› Issue (S2): 27-35.

深埋长大隧洞围岩非线性蠕变模型研究

朱珍德^{1, 2, 3}，朱明礼⁴，阮怀宁²，黄强²，韩立军³

1. 温州大学建筑与土木工程学院，浙江温州 325035；2. 河海大学岩土工程研究所，南京 210098； 3. 中国矿业大学深部岩土力学与地下工程国家重点实验室，江苏徐州 221008；4. 河南理工大学能源科学与工程学院，河南焦作 454000

收稿日期:2011-04-28 出版日期:2011-08-10 发布日期:2011-08-26
作者简介:朱珍德，男，1964年生，博士，教授，博士生导师，主要从事岩石力学与工程方面教学与科研工作
基金资助:
中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金项目（No. SKLGUEK0902）；浙江省重大科技计划重点项目（No. 2009C33049）；江苏省2010年度研究生培养创新计划项目（No. CX10B-206Z）；江苏省2010年度土木工程博士研究生培养科技创新计划项目

Nonlinear creep model of surrounding rock of long, large and deep tunnel

ZHU Zhen-de^{1, 2, 3}, ZHU Ming-li⁴, RUAN Huai-ning², HUANG Qiang², HAN Li-jun³

1. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China; 3. State Key Laboratory for Geomechanics and Deep Underground Engineering, China Universityof Mining and Technology, Xuzhou, Jiangsu 221008, China;4. College of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China

Received:2011-04-28 Online:2011-08-10 Published:2011-08-26

摘要/Abstract

摘要： 针对锦屏二级水电站深埋长大隧洞（埋深为2 525 m，长为19 km，宽为13 m）围岩在开挖过程中呈现明显的流变劣化特征，采用CSS-283双向万能伺服试验机，对洞室围岩（软弱板岩）进行单轴压缩蠕变试验和剪切蠕变试验，引入流变参数是时间函数与强化函数，建立岩石非定常参数剪切蠕变模型和单轴压缩蠕变模型，并推广到三轴非线性流变模型，与试验结果对比基本吻合。最后，结合锦屏二级水电站深埋长大隧洞进行数值计算，得到该隧洞190 d开挖运行变形规律，以期为工程建设提供理论指导。

关键词: 板岩, 非定常参数, 蠕变试验, 非线性流变模型, 数值计算

Abstract: The rock excavation in the deep and long tunnels of Jinping second stage hydropower station (depth 2 525 m, length 19 km, width 13 m) showed an obvious deterioration to its rheological properties. The CSS-283 bi-direction universal servo testing machine is used to conduct uniaxial compression creep test and shear creep test for the surrounding rock(soft slate). The respective rheological model of rock for shear and uniaxial compression creep processes is established by introducing the rheological parameters which are functions of hardening and time. This nonlinear creep model presents the expression of strain equation, which is a together of four individual strain parts, including the instantaneous elastic deformation, viscoelastic deformation, instantaneous plastic deformation and viscoplastic deformation. What’s more, those parameters in the strain equation are non-stationary, they are correlated with time and stress. Besides, the harding characteristic of rock samples is also considered during the behaviors of their creep process. Based on that the corresponding three-dimension model is therefore developed, the theoretical calculated results are well consistent with the test results. Finally, numerical simulation is performed to study the excavation of deep tunnels of Jinping hydropower station and the tunnel deformation after the 190 days’ excavation is also obtained. Accordingly, these investigation results can provide a theoretical guidance for the engineering construction

Key words: slate, nonstationary parameters, creep test, nonlinear rheological model, numerical calculation

中图分类号:

TV 741

朱珍德，朱明礼，阮怀宁，黄强，韩立军. 深埋长大隧洞围岩非线性蠕变模型研究[J]. , 2011, 32(S2): 27-35.

ZHU Zhen-de　, ZHU Ming-li　, RUAN Huai-ning　, HUANG Qiang　, HAN Li-jun　. Nonlinear creep model of surrounding rock of long, large and deep tunnel[J]. , 2011, 32(S2): 27-35.

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