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朱    飞 ¹  , 关天定² ,  苏    倩³ , 周建伟⁴

( 1. 陕西海嵘工程试验检测股份有限公司 ，陕西 西安 710000;

2. 广东建设职业技术学院 ，广东 广州 510000;

3. 西安长安大学工程设计研究院有限公司 ，陕西 西安 710000;

4. 川藏铁路有限公司 ，四川 成都 610094)

摘   要：为了研究水对岩石力学行为影响的机理，除力学性质外，还需要关注应力应变曲线随不同水条件的变化情况，这是表示力学行为的最基本特征之一 。在本研究中，研究了含水饱和度对岩石单轴抗压强度和应力应变曲线的影响。使用安山岩、凝灰岩、砂岩、花岗岩和大理岩进行了6 种含水条件下的单轴压缩试验。试验结果表明，安山岩 、凝灰岩 、砂岩和花岗岩的应力应变曲线随含水饱和度的变化而变化 。另一方面，却未观 察到含水饱和度对大理岩应力应变曲线的影响。根据试验结果，讨论了由于含水饱和度降低而导致的强度增加机理，研究了峰值强度随水分条件变化的变化规律，并在此基础上考虑了不同水分条件下应力应变曲线之间的关系。

关键词： 岩石； 含水饱和度； 单轴抗压强度； 应力应变曲线

中图分类号： TU454       

文献标志码： A      

文章编号： 1005-8249 (2023) 03-0008-08

DOI : 10. 19860/j.cnki.issn1005-8249.2023.03.008

ZHU Fei¹ , GUAN Tianding² , SU Qian³ , ZHOU Jianwei⁴

( 1. Shaanxi Hairong Engineering Test and Testing Co. ，Ltd. ，Xi ’an 710000 , China;

2. Guangdng Coustruction Polytechnic , Guangdong 510000 , China;

3. The Engineering Design Academy of Chang'an University Co. ，Ltd , Xi ’an 710000 , China;

4. Sichuan-Tibet Railway Co. ，Ltd. ，Chengdu 610094 , China; )

Abstract:In order to study the mechanism of the influence of water on the mechanical behavior of rock, in addition to mechanical properties, it is necessary to pay attention to the change of stress-strain curve with different water conditions, which is one of the most basic characteristics of mechanical behavior. In this study, the influence of water content on uniaxial compressive strength and stress-strain curve of rock is studied. Uniaxial compression tests under six water-bearing conditions were carried out using andesite, tuff, sandstone, granite and marble. The experimental results show that the stress-strain curves of andesite, tuff, sandstone and granite change with the change of water content. On the other hand, the influence of water content on the stress-strain curve of marble has not been observed. According to the experimental results, the mechanism of strength increase due to the decrease of water content is discussed, and the variation law of peak strength with the change of water condition is studied. On this basis, the relationship between stress-strain curves under different water conditions is considered.

Keywords : rock , water saturation , uniaxial compressive strength , stress-strain curve

∗基金项目： 国家自然科学基金重点国际（ 地区） 合作研究项目 ，复杂动载下受损长大隧道的灾变智慧感知方法研究(52020105002); 垃圾填埋场防渗衬垫材料性能研究( ZD2020-03) 。

作者简介：朱飞  (1984-) 男，硕士，高级工程师，从事公路水运工程试验检测工作。

通信作者：周建伟  (1983-) , 男，本科，工程师，研究方向为隧道桥梁。

收稿日期：2023-05-24