张建华,姚志华,冯世清,黄练红,杨东,赵杰,丁林

• 1:中国建筑西南勘察设计研究院有限公司
• 2:空军工程大学机场建筑工程系

摘要(Abstract)：

原状黄土的强度参数取值是高陡原状黄土边坡稳定性分析的重要环节,由于目前对于采用何种试验方法取得原状黄土的强度参数尚未有统一的认识,针对试验方法对强度参数取值影响的实际问题,为合理确定高陡原状黄土边坡稳定性分析中强度参数,依托某机场削方形成的高陡原状黄土边坡治理工程,以非饱和原状黄土(Q_3~(eol))为研究对象,采用现场剪切试验及室内直剪试验对其强度参数进行测试,着重探究试验方法对强度参数的影响机制。研究结果表明,同一初始物理条件下,现场剪切试验所得原状黄土强度参数较室内试验普遍较低。现场试验与室内试验所得内摩擦角比值约在0.77～0.87之间,而黏聚力比值约在0.84～0.89之间。该差异主要与试验条件、尺寸效应、侧限约束以及有效接触面积等因素密切有关,从而重要和永久性边坡工程的强度参数取值宜采用现场原位剪切试验测试结果。研究成果可为高陡黄土边坡稳定性分析中的强度参数取值以及同类工程建设提供一定借鉴。

关键词(KeyWords)： 非饱和原状黄土;黏聚力;内摩擦角;现场剪切试验;尺寸效应;抗剪强度;力学性能;影响因素

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(11972374)

作者(Author): 张建华,姚志华,冯世清,黄练红,杨东,赵杰,丁林

DOI: 10.13928/j.cnki.wrahe.2021.06.020

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