新型卧式土工平面应变仪研制

发布时间：2018-02-17 03:51

本文关键词： 平面应变仪平面应变试验破坏特性　出处：《岩土力学》2015年07期 　论文类型：期刊论文

【摘要】：平面应变仪是一种开发较早但至今尚不完善的一种土工试验仪器,随着国家基础设施建设的发展,平面应变试验及试验方法在许多领域得以应用,显示出了平面应变试验在工程设计和研究中的重要性。通过回顾国内外平面应变仪的发展,提出了开发一种新型的土工平面应变三轴仪的思路,以实现更科学、更精确地进行复杂应力加载条件下土平面应变试验的研究。以此为目的,从压力室结构、加载系统及控制量测系统等方面提出了相应的改善措施,开发了一种新型的土工平面三轴仪。并通过重塑黄土的平面应变试验及改进的真三轴仪平面应变试验对比、以及平面应变试验强度参数与常规三轴试验强度参数对比分析,验证了所研制的新型卧式土工平面应变仪的合理性和研制思路的正确性。最后,通过对该平面应变仪应变试验的黄土破坏特性与改进真三轴平面应变试验的黄土破坏特征的对比分析,验证了本文所开发的平面应变仪在描述土体应变局部化问题的合理性。
[Abstract]:The plane strain gauge is a kind of geotechnical test instrument which was developed earlier but has not been perfect up to now. With the development of national infrastructure construction, plane strain test and test method have been applied in many fields. This paper shows the importance of plane strain test in engineering design and research. By reviewing the development of plane strain meter at home and abroad, the idea of developing a new type of plane strain triaxial instrument is put forward to realize more scientific. The research on plane strain test of soil under complex stress loading conditions is carried out more accurately. For this purpose, the corresponding improvement measures are put forward from the aspects of pressure chamber structure, loading system and control measurement system, etc. A new type of geo-plane triaxial apparatus has been developed. Through the plane strain test of remolded loess and the comparison of the improved true triaxial test with the plane strain test, the strength parameters of the plane strain test are compared with those of the conventional triaxial test, and the strength parameters of the plane strain test are compared with those of the conventional triaxial test. The rationality of the new horizontal geotechnical plane strain gauge and the correctness of the development idea are verified. Finally, Through the comparison and analysis of the loess failure characteristics of the plane strain gauge test and that of the improved true triaxial plane strain test, the rationality of the plane strain meter developed in this paper in describing the soil strain localization problem is verified.
【作者单位】：西安理工大学岩土工程研究所;贵州工程应用技术学院土木建筑工程学院;
【基金】：国家自然科学基金项目(No.50779054) 贵州省自然科学基金项目(黔科合J字LKB[2012]13号) 贵州省教育厅自然科学重点项目(黔教合KY字[2013]179)
【分类号】：TU415

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