Investigation on rheological mechanical properties of hornblende plagioclase gneiss

JIANG Yu-zhou; XU Wei-ya; WANG Rui-hong

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Investigation on rheological mechanical properties of hornblende plagioclase gneiss

更新时间：2026-06-25

- Investigation on rheological mechanical properties of hornblende plagioclase gneiss
- Vol. 32, Issue S1, (2011)
- 作者机构：
  
  1. 河海大学岩土工程研究所,南京,210098
  2. 长江科学院水利部岩土力学与工程重点实验室,武汉,430010
  3. 三峡大学三峡库区地质灾害教育部重点实验室,湖北,宜昌,443002
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU45
- Online First：16 May 2011，
  
  Published：2011
- 稿件说明：
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JIANG Yu-zhou, XU Wei-ya, WANG Rui-hong. Investigation on rheological mechanical properties of hornblende plagioclase gneiss[J]. 2011, 32(S1).
DOI：

JIANG Yu-zhou, XU Wei-ya, WANG Rui-hong. Investigation on rheological mechanical properties of hornblende plagioclase gneiss[J]. 2011, 32(S1). DOI：

摘要

为了解小湾水电站枢纽区角闪斜长片麻岩的流变力学特性，采用岩石全自动三轴流变伺服仪对角闪斜长片麻岩进行三轴流变力学试验。试验结果表明，强度较高的角闪斜长片麻岩会发生流变现象，尤其在高应力水平条件下，其流变特性明显；外荷载超过岩样的长期强度时，随着时间的逐渐增加试样变形经历典型流变3个阶段，并最终加速流变破裂。依据岩样稳态流变阶段的流变速率与应力水平的关系，提出了一种确定长期强度的方法。在Burgers流变模型中加入统计损伤，并用Mohr-Coulomb准则确定的岩石长期强度作为开始进入非线性加速流变阶段的阀值，得到相应的非线性损伤流变模型。利用岩石全程三轴流变试验结果，采用优化后的算法，对非线性损伤流变模型相应的参数进行了辨识，结果表明，建立的岩石统计损伤非线性流变变模型与流变试验结果吻合较为理想，可以较为准确地反映角闪斜长片麻岩的流变力学特征

Abstract

In order to investigate the rheological properties of hornblende plagioclase gneiss in Xiaowan Hydropower Project

triaxial compression rheological experiments for hornblende plagioclase gneiss spceimens are carried out on the rock servo-controlling rheology testing machine. The rheology testing results show that rheological properties of hornblende plagioclase gneiss is very obvious. Based on the triaxial rheological experimental results

the variance law of axial strains of hornblende plagioclase gneiss specimens with the time under different pressures is investigated; and the development trends and characteristics of rock deformation in stage of accelerated rheology are discussed. At the same time

the scanning electron microscopy experiments of rheological rupture fracture are carried out; the rupture forms and mechanisms are analyzed. Based on the relation between creep rate and stress level in the stage of steady-state creep

a new method is put forward to determine long-term strength. Combining statistical damage model and Burgers rheological model

the corresponding damage rheological model is proposed; and then rock statistical damage rheological model is verified by accelerated rheological test curves of rock spceimen. The results show that the rock statistical damage nonlinear rheological model agrees well with the rheology test results

and can exactly describe the rheological properties of hornblende plagioclase gneiss in Xiaowan Hydropower Project.

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