| 膨胀土临界状态强度特性及其模型拟合 |
| |
| 引用本文： | 李志清,余文龙,周应新,李晶哲,钱坤,金少明.膨胀土临界状态强度特性及其模型拟合[J].工程地质学报(英文版),2015,23(2):245-251. |
| |
| 作者姓名： | 李志清 余文龙 周应新 李晶哲 钱坤 金少明 |
| |
| 作者单位： | 1.中国科学院地质与地球物理研究所, 中国科学院页岩气与地质工程重点实验室 北京 100029; |
| |
| 基金项目： | 国家自然科学基金项目，中国科学院战略性先导科技专项(B类)(XDB10030102)资助． |
| |
| 摘 要： | 针对蒙自地区膨胀土,进行了饱和重塑条件下的固结排水(CD)与固结不排水(CU)试验,系统研究了饱和土在不同固结围压3、初始干密度d、初始含水量0、剪切速率、排水条件下的应力应变特性。通过对临界状态试验结果的归一化处理,揭示了不同试验方法对同一土样抗剪强度量测差异的内在统一性,得到了重塑饱和膨胀土在固结排水与不排水条件下p'-q-空间内的破坏线。利用双曲线模型较好地拟合了弱硬化型应力应变曲线,用指数曲线模型拟合了弱软化型应力应变曲线,为模拟边坡在降雨条件下的抗剪强度变化及构筑物土体处于正常水位时的强度状态等工况提供了技术参数与理论支持。
|
| 关 键 词： | 膨胀土 临界状态 重塑土 归一化 |
| 收稿时间： | 2014-05-13 |
MODEL FITTING AND STRENGTH CHARACTERISTICS OF CRITICAL STATE FOR EXPANSIVE SOIL |
| |
| LI Zhiqing,YU Wenlong,ZHOU Yingxin,LI Jingzhe,QIAN Kun,JIN Shaoming.MODEL FITTING AND STRENGTH CHARACTERISTICS OF CRITICAL STATE FOR EXPANSIVE SOIL[J].Journal of Engineering Geology,2015,23(2):245-251. |
| |
| Authors: | LI Zhiqing YU Wenlong ZHOU Yingxin LI Jingzhe QIAN Kun JIN Shaoming |
| |
| Institution: | 1.Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029;2.Daqing Oilfield Engineering Co., Ltd., Daqing 163712;3.Yunnan Highway Development & Investment Co., Ltd., Kunming 650200;4.Yunnan Jiujiu Garden Construction Co., Ltd., Kunming 650020 |
| |
| Abstract: | According to Mengzi expansive soil, consolidated drained tests and undrained tests are carried on under the saturated and remolded condition. The stress-strain characteristics of saturated soil are researched systematically under different consolidation pressure, initial dry density, initial water content, shearing rate and drainage condition. The inherent unity of diversity of shearing strength for the same samples is measured by different experimental methods and is indicated according to the normalization of critical state test results. The failure lines in p'-q- space of remolded saturated expansive soil under consolidated drained and undrained condition are attained. The hyperbolic curve model can fit well the inferior hardening stress-strain curve. The exponential curve model can fit the inferior soft stress-strain curve. The test results can provide technical parameters and theoretical help for shearing strength variation of slope during rainfall and strength state of soil structure in normal water level. |
| |
| Keywords: | Expansive soil Critical state Remolded soil Normalization |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《工程地质学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《工程地质学报(英文版)》下载免费的PDF全文 |
|
