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石窟砂岩冻融循环破坏试验研究
Experimental study on freezing and thawing cycle damage of grotto sandstone
投稿时间:2019-10-25  修订日期:2020-03-15
DOI:
中文关键词:  冻融循环  石窟砂岩  宏观  细观  层理
英文关键词:Freeze-thaw cycle  grotto sandstone  macro  stratification
基金项目:国家重点研发计划重点专项项目(2017YFC1503102)
作者单位E-mail
刘向峰 辽宁工程技术大学 力学与工程学院 305066889@qq.com 
郭子钰 辽宁工程技术大学 力学与工程学院 1832629979@qq.com 
王来贵 辽宁工程技术大学 力学与工程学院  
高晗 辽宁工程技术大学 力学与工程学院  
丁盛鹏 辽宁工程技术大学 力学与工程学院  
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中文摘要:
      为研究不同状态下石窟砂岩冻融循环过程中物理力学性质发展规律,选取完整和缺陷饱和状态、完整和缺陷自然状态、完整和缺陷干燥状态6种不同状态石窟砂岩进行试验研究,通过宏观—细观角度分析砂岩冻融循环破坏。试验结果表明:饱和含层理缺陷岩样受冻融循环质量损失最为显著,对于含层理缺陷或完整无缺陷岩样,含水状态越高质量损失率越大;纵波波速均随着含水状态的提高而降低。未冻融条件下完整组岩样抗压强度显著高于含层理缺陷岩样,含层理缺陷或完整无缺陷岩样随着含水状态增加岩样抗压强度降低。在细观观测中含层理组岩样在裂隙条数基本大于完整组岩样,含层理缺陷组岩样中出现裂隙汇交,而完整组未出现,最后含层理缺陷组岩样裂隙方向大致都平行且沿着层理方向,而完整岩样裂隙无确定方向。
英文摘要:
      In order to study the development law of physical and mechanical properties during the freezing and thawing cycles of grotto sandstone in different states, six different state grotto sandstone with complete and defect saturation state, complete and defect natural state, complete and defect dry state were selected for experimental research. A detailed analysis of the damage of sandstone freeze-thaw cycles. The test results show that the loss of the quality of frozen-thawed cycle is the most significant. For the fault-containing or intact non-defective rock samples, the higher the water content, the higher the mass loss rate; the longitudinal wave velocity is consistent with the water-containing state. Increase and decrease. Under the condition of unfrozen-thawed conditions, the compressive strength of the intact group rock samples is significantly higher than that of the rock samples with layering defects, and the rock-bearing compressive strength decreases with the water-bearing state. In the scrutinize observation, the number of fractures in the bed group is much larger than that in the complete group, and the fractures are formed in the rock with the bedding defect, but the intact group does not appear. Finally, the rock fragments in the faulty group are included. The directions are generally parallel and along the bedding direction, while the intact rock fissures have no defined direction.
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