温度对不同饱和状态全风化泥岩抗剪强度的影响研究
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1.吉林建筑大学测绘与勘查工程学院;2.季冻区岩土工程研究所

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TU452

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第七届中国科协青年人才托举工程(2021QNRC001);吉林省科技发展计划项目(YDZJ202201ZYTS490)


Study Of The Effect Of Temperature On The Shear Strenth Of Fully Weathered Mudstone At Different Saturations
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1.School of Geometrics and Prospecting Engineering,Jilin Jianzhu University;2.Institute of Geotechnical Engineering in the Seasonal Frozen Zone;3.School of Geometrics and Prospecting Engineering, Jilin Jianzhu University

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    摘要:

    为研究温度对不同饱和状态全风化泥岩抗剪强度的影响,以典型季冻区全风化泥岩试样为研究对象,利用GDS非饱和试验系统,对饱和状态及天然非饱和状态下的全风化泥岩分别进行室内三轴试验,研究不同温度对其抗剪强度参数的影响,并对比分析饱和状态及天然非饱和状态下全风化泥岩抗剪强度参数之间的的区别。结果表明:全风化泥岩强度受饱和度与温度影响较大。随温度降低两种土样的黏聚力均增加,内摩擦角均先增加再减小。温度与试验系统条件一致时,非饱和全风化泥岩试样黏聚力始终大于饱和全风化泥岩试样。饱和度对试样的内摩擦角影响较小,两种土样的内摩擦角分别在-5℃与0℃时达到峰值。

    Abstract:

    In order to study the effect of temperature on the shear strength of fully weathered mudstone with different saturations,fully weathered mudstone specimens from a typical seasonal frozen region were used as the object of study.The GDS dynamic triaxial test system and the GDS unsaturated test system were used to conduct indoor triaxial tests on specimens with different saturations to investigate the trends of the shear strength parameters of fully weathered mudstone in the seasonal frozen region under different temperatures and surrounding pressures, and to compare and analyse the shear strength parameters of the two different saturations of the fully weathered mudstone were compared and analysed. The results show that the fully weathered mudstone is strongly influenced by saturation and temperature.The cohesion of both soil samples increases with decreasing temperature, and the internal friction angle increases and then decreases. The cohesion of the unsaturated mudstone specimens is consistently greater than that of the saturated mudstone specimens when the temperature and test system conditions are consistent. Saturation has a low effect on the internal friction angle of the specimens, which peaks at -5℃and 0℃for the two soil samples respectively.

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郭浩天,林昱利,王哲,等. 温度对不同饱和状态全风化泥岩抗剪强度的影响研究[J]. 科学技术与工程, , ():

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  • 收稿日期:2023-11-30
  • 最后修改日期:2024-06-11
  • 录用日期:2024-06-24
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