| 温度和含水状态对岩石劈裂强度影响的试验研究 |
| |
| 引用本文： | 王冲,赖远明,尤哲敏,杨勇,余东合,刘国华.温度和含水状态对岩石劈裂强度影响的试验研究[J].冰川冻土,2016,38(5):1317-1324. |
| |
| 作者姓名： | 王冲 赖远明 尤哲敏 杨勇 余东合 刘国华 |
| |
| 作者单位： | 1. 兰州大学 土木工程与力学学院, 甘肃 兰州 730000;
2. 中国科学院 寒区旱区环境与工程研究所 冻土工程国家重点实验室, 甘肃 兰州 730000;
3. 中国石油华北油田公司, 河北 任丘 062552;
4. 中国石油华北油田公司 采油工程研究院, 河北 任丘 062552 |
| |
| 基金项目： | 国家自然科学基金;中国科学院西部行动计划;国家重点基础研究发展计划（973计划）;中国石油华北油田公司采油工程研究院项目 |
| |
| 摘 要： | 岩土类材料的强度强烈依赖于含水率和温度条件.以兰州兰山砂岩为研究对象，分别进行了不同温度（+20℃、-5℃、-10℃）和不同含水率（干燥、天然含水率和饱和状态）条件下岩石的巴西圆盘劈裂试验.试验结果表明，常温下，岩石抗拉强度随含水率增加而急剧减小，试样饱和时软化、崩解，丧失承载能力；在不同负温条件下，天然含水状态的试样抗拉强度最大，干燥状态下最小；在-10~+20℃范围内，干燥岩石强度随温度升高，抗拉强度增大，含水岩石均是随温度升高，抗拉强度减小，但饱和岩石在-5℃时抗拉强度最大.含水率和温度对岩样强度的影响存在临界值，超过临界值，岩样强度随上述因素反向变化.试验结论为岩土类材料劈裂强度的标准化测试及其工程应用提供了重要的基础数据参考.
|
| 关 键 词： | 岩石力学 巴西劈裂试验 温度 含水率 抗拉强度 |
| 收稿时间： | 2016-05-03 |
| 修稿时间： | 2016-07-22 |
Experimental study of the effect of temperature and moisture state on rock Brazilian splitting strength |
| |
| WANG Chong,LAI Yuanming,YOU Zhemin,YANG Yong,YU Donghe,LIU Guohua.Experimental study of the effect of temperature and moisture state on rock Brazilian splitting strength[J].Journal of Glaciology and Geocryology,2016,38(5):1317-1324. |
| |
| Authors: | WANG Chong LAI Yuanming YOU Zhemin YANG Yong YU Donghe LIU Guohua |
| |
| Institution: | 1. School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China;
2. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
3. PetroChina Huabei Oilfield Company, Renqiu 062552, Hebei, China;
4. Petroleum Production Engineering Research Institute of PetroChina Huabei Oilfield Company, Renqiu 062552, Hebei, China |
| |
| Abstract: | The tensile strength of rock depends on moisture contents and temperatures. In order to study the mechanical properties of sandstone sampled from Lanzhou, Brazilian splitting test was carried out to investigate sandstone's tensile strength under different temperatures (+20℃, -5℃, -10℃) and different moisture contents (dry, natural and saturated). The test results showed that the tensile strength of sandstone decreases sharply with moisture content, until it softens to disintegration and loses bearing capacity due to saturation. When temperature less than 0℃, the specimens at natural water state has tensile strength always higher than those at dry state. When temperatures change between -10℃ and +20℃, the tensile strength of dry rock increases with temperature, but the tensile strength of saturated rock reaches the maximum at -5℃. There are critical values for the moisture content and temperature effects, exceed the critical values, the relationship between the tensile strength of the rock and the moisture content or temperature will be inverted. These results will be useful for testing the tensile strength of rock and forecasting rock strength. |
| |
| Keywords: | rock mechanics Brazilian splitting test temperature moisture content tensile strength |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《冰川冻土》浏览原始摘要信息 |
| 点击此处可从《冰川冻土》下载免费的PDF全文 |
|
