温度影响下砂岩三轴压缩行为：加荷特性、剪切变形及预测软件研发

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摘要本研究通过开展20~150 ℃及5~35 MPa围压下的砂岩三轴压缩试验，系统揭示了温度与围压耦合作用~对砂岩加荷特性、剪切变形及破坏模式的影响机制。结果表明：低温区间（20~ 60 ℃）砂岩以脆性破坏为主，剪切变形带角度随围压增大显著减小（64.7°到58.3°）；高温区间（温度≥120 ℃）塑性屈服特征增强，150 ℃时围压增加（5~35 MPa）导致剪切角度降幅达15.3°。破坏模式由低围压张拉破坏向高围压剪切破坏过渡，温度升高促使破坏面粗糙度增加。对比Mogi-Coulomb、Drucker-Prager及Tresca准则，修正Lade准则因引入偏应力不变量与Lode角参数，拟合效果最优（R2≥0.97）。基于该准则构建剪切变形带角度预测模型，结合PyCharm与Gradio开发多温度离散化预测软件，实现0.8 s内高精度预测（绝对误差2.5°，R2=0.92），输出参数可集成至有限元平台，为高地应力隧道及深部岩体工程稳定性评估提供理论支持与工具保障。

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	钟浩
	孔庆轩
	孙浩

关键词: 砂岩三轴压缩试验温度-围压耦合效应剪切变形带角度修正Lade准则预测模型破坏模式工程应用

Abstract: This study conducted triaxial compression tests on sandstone under temperatures of 20~150 ℃ and confining pressures of 5~35 MPa and systematically revealed the coupled effects of temperature and confining pressure on the loading characteristics, shear deformation, and failure modes of sandstone. The results indicated that in the low-temperature range (20~60 ℃), sandstone predominantly exhibits brittle failure, with the shear deformation band angle significantly decreasing as confining pressure increases (64.7°→58.3°). In the high-temperature range (≥120 ℃), plastic yielding characteristics intensify, and at 150 ℃, the increase in confining pressure (5~35 MPa) resulted in a 15.3° reduction in the shear angle. The failure mode transitions from tensile failure under low confining pressure to shear failure under high confining pressure, with elevated temperatures increasing the roughness of failure surfaces. Compared to the Mogi-Coulomb, Drucker-Prager, and Tresca criteria, the modified Lade criterion demonstrates optimal fitting performance (R2≥0.97) by incorporating deviatoric stress invariants and the Lode angle parameter. Based on this criterion, a prediction model for shear deformation band angles was developed. The developed multi-temperature discrete prediction software, integrated with PyCharm and Gradio, achieved high-precision predictions within 0.8 seconds (absolute error: 2.5°, R2=0.92). The output parameters were designed to be embedded into finite element platforms, providing theoretical and practical tools for stability assessments of high-stress tunnels and deep rock mass engineering.

Key words: sandstone triaxial compression test temperature-confining pressure coupling effect shear deformation band angle modified Lade criterion prediction model failure modes engineering applications

收稿日期: 2025-03-06 修回日期: 2025-04-22 发布日期: 2025-04-23

中图分类号:

U459

作者简介: 2025-04-22

引用本文:

钟浩, 孔庆轩, 孙浩. 温度影响下砂岩三轴压缩行为：加荷特性、剪切变形及预测软件研发[J]. 隧道与地下工程灾害防治, .
ZHONG Hao, KONG Qingxuan, SUN Hao. Triaxial compression behavior of dandstone under temperature influence: loading characteristics, shear deformation, and development of prediction software. Hazard Control in Tunnelling and Underground Engineering, 0, (): 1-19.

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