| 深部土K_0试验方法及对减载力学特性的影响 |
| |
| 引用本文： | 赵晓东,周国庆,田秋红. 深部土K_0试验方法及对减载力学特性的影响[J]. 中国矿业大学学报, 2011, 0(5) |
| |
| 作者姓名： | 赵晓东 周国庆 田秋红 |
| |
| 作者单位： | 中国矿业大学深部岩土力学与地下工程国家重点实验室;九州职业技术学院土木工程学院; |
| |
| 基金项目： | 国家自然科学基金重点项目(50534040);国家自然科学基金项目(50974117) |
| |
| 摘 要： | 为获得K0试验方法对土体K0固结-减载(保持轴压恒定卸除围压)变形和强度的影响,采用室内常见两种K0方法研究了深部土固结-减载应力-应变和强度特性,并分析了不同K0试验方法的误差.结果表明:采用不同K0试验方法进行固结的深部土减载路径中均呈现出脆性,但刚性压力室-柔性侧限方法下的脆性特征不明显,此种方法下进行的减载试验将低估深部土抵抗破坏的能力;刚性压力室-伺服控制试样某一高度处侧向变形为零的方法可有效控制试样平均径向变形,优于前者而对深部土更具有适用性.
|
| 关 键 词： | 深部土 K0试验方法 减载 应力-应变 三轴压缩强度 |
Influences of test method for earth pressure coefficient at rest to unloading properties of deep clay |
| |
| ZHAO Xiao-dong,ZHOU Guo-qing,TIAN Qiu-hong. Influences of test method for earth pressure coefficient at rest to unloading properties of deep clay[J]. Journal of China University of Mining & Technology, 2011, 0(5) |
| |
| Authors: | ZHAO Xiao-dong ZHOU Guo-qing TIAN Qiu-hong |
| |
| Affiliation: | ZHAO Xiao-dong1,ZHOU Guo-qing1,TIAN Qiu-hong2(1.State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining & Technology,Xuzhou,Jiangsu 221008,China,2.Departement of Civil Engineering,Jiuzhou College of Vocation & Technology,Jiangsu 221116,China) |
| |
| Abstract: | Two common laboratory test methods to determine K0 were used to find how K0 is affected by the test method.The deformation and strength during unloading were examined.The stress-strain and tri-axial compression strength of reconstituted deep soils during unloading was tested by the two methods.The deep soils consolidated by the different methods both show brittle fracture during radial unloading.However,the rigid chamber with flexible confinement method gave less obvious results in this regard.Consequently,... |
| |
| Keywords: | deep soils K0 test methods unloading stress-strain tri-axial compression strength |
| 本文献已被 CNKI 等数据库收录！ |
