| 冻土中微裂纹尺寸的识别与确认 |
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| 引用本文： | 李洪升,王悦东,刘增利.冻土中微裂纹尺寸的识别与确认[J].岩土力学,2004,25(4):534-537. |
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| 作者姓名： | 李洪升 王悦东 刘增利 |
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| 作者单位： | 大连理工大学 工程力学系，辽宁 大连，116024 |
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| 基金项目： | 国家自然科学基金资助(项目批准号:50278010) |
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| 摘 要： | 在对冻土微观结构试验观测的基础上，提出了对冻土中微裂纹尺寸进行识别和确认的方法，给出了3种典型土质在不同温度下的微裂纹尺寸参考值，为应用冻土强度破坏准则进行定量计算与分析提供依据。将冻土微裂纹损伤区作为冻土体的缺陷处理，并按“当量化裂纹”原则，把冻土微裂纹损伤区简化为“当量裂纹”，如此给出了理论估算微裂纹尺寸的新途径。把理论计算与试验观测结果进行比较，二者符合较好。
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| 关 键 词： | 冻土 微裂纹尺寸 识别与确认 当量裂纹 |
| 文章编号： | 1000-7598-(2004)04-0534-04 |
| 收稿时间： | 2003-01-17 |
| 修稿时间： | 2003年1月17日 |
Identification and determination of micro-crack size for frozen soil |
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| LI Hong-sheng,WANG Yue-dong,LIU Zeng-li.Identification and determination of micro-crack size for frozen soil[J].Rock and Soil Mechanics,2004,25(4):534-537. |
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| Authors: | LI Hong-sheng WANG Yue-dong LIU Zeng-li |
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| Institution: | Department of Engineering Mechanics, Dalian Univ. of Technology, Dalian 116024, China |
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| Abstract: | Based on investigation of microstructure characteristics for frozen soil, a new method is put forward to identify and determine micro-crack size in frozen soil. Considering micro-crack damage area as defects and simplified it as equivalent crack according to equivalent crack critical. Thus, the foundation of quantitative calculation and analysis for strength failure for frozen soil is set up. Reference values for three kinds of soils under different temperatures are given; and comparison between calculation results and investigation data shows that they coincided well. |
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| Keywords: | frozen soil micro-crack size identification and determination equivalent crack |
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