罗战友,付秀祥,杜时贵,刘广建,黄曼,雍睿

• 1:浙江科技大学土木与建筑工程学院
• 2:宁波大学岩石力学研究所
• 3:绍兴文理学院土木工程学院

摘要(Abstract)：

含软弱夹层倾斜结构面的剪切特性与倾斜角、充填度密切相关,为了获得具有起伏形貌的含软弱夹层倾斜结构面的剪切特性,采用多功能岩土体接触破损测试系统,开展了针对起伏形貌的含软弱夹层倾斜结构面试样的直剪试验。试验结果表明:(1)不含软弱夹层的倾斜结构面剪应力–剪切位移曲线具有峰值剪断特征;含软弱夹层倾斜结构面剪应力–剪切位移曲线具有滑动破坏特征。(2)充填度不同时,倾斜结构面法向位移随剪切位移增大而增大,变化率逐渐增大并趋于稳定,呈剪胀效应特征;倾斜角不同时,结构面法向位移均随着剪切位移的增大而增大,并且法向位移前期增长率明显小于后期增长率。(3)倾斜结构面抗剪强度随充填度的增大呈负指数减小;随倾斜角和法向应力的增大近似呈线性增大。(4)考虑软弱夹层材料、充填度及倾斜角对抗剪强度的影响,在Barton抗剪强度模型的基础上,建立了适用于含软弱夹层倾斜结构面抗剪强度模型。研究成果可为工程岩体稳定性评价提供参考。

关键词(KeyWords)： 岩石结构面;软弱夹层;充填度;倾斜角;剪切特性;直剪试验

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(42277147,42272333)

作者(Author): 罗战友,付秀祥,杜时贵,刘广建,黄曼,雍睿

DOI: 10.13532/j.jmsce.cn10-1638/td.2024.05.004

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