可视化三轴渗流–应力耦合伺服控制试验系统的研制与应用

doi:10.13722/j.cnki.jrme.2022.0615

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摘要在原有的可视化三轴压缩伺服控制试验系统中增加顶部和底部的渗流通道，以实现渗流–应力耦合条件下岩石的可视化三轴压缩试验。为验证该试验系统的可靠性和必要性，对砂岩进行不同渗流状态和不同渗透压差条件下的三轴渗流–应力耦合试验。试验结果表明，当岩石两端都存在水压的条件下，其力学性质会进一步弱化，2种渗流极限状态的试验并不能说明所有渗流–应力耦合条件对岩石力学特性的影响。随着轴向应力的增加，表面径向应变场中大应变数据点逐渐聚集至断裂面附近，出现变形局部化现象。因此，开展复杂渗流–应力耦合作用下岩石力学试验能够更好地研究渗流场对岩石的作用机制。

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	陈奕安1
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	许江1
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	彭守建1
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	曹琦1
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	饶豪魁1
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关键词 ：岩石力学, 力学试验, 渗透压差, 渗流状态, 径向应变场, 破坏模式

Abstract：The new seepage channels were added to the original transparent triaxial compression servo-control test system to conduct the visual triaxial compression tests of rock under seepage-stress coupling conditions. Triaxial compression tests were conducted on sandstone under the conditions of different seepage states and different seepage pressure differences to verify the reliability and necessity of the test system. The experimental results show that the mechanical properties of rock were weakened under the water pressure at both ends of the rock，and the two seepage limit state tests cannot represent the influence of all the seepage-stress coupling conditions on the mechanical properties of rock. And the large strain data points in the radial strain field gradually gather near the fracture surface with the increase of axial stress，and the deformation localization occurs. Therefore，the mechanism of seepage field on rock mechanical properties can be better studied by the mechanical tests under complex seepage-stress coupling.

Key words： rock mechanics mechanical test seepage pressure difference seepage state radial strain field failure mode

引用本文:

陈奕安1，2，许江1，2，彭守建1，2，曹琦1，2，饶豪魁1，2. 可视化三轴渗流–应力耦合伺服控制试验系统的研制与应用[J]. 岩石力学与工程学报, 2023, 42(S1): 3281-3292.
CHEN Yian1，2，XU Jiang1，2，PENG Shoujian1，2，CAO Qi1，2，RAO Haokui1，2. Development and application of transparent triaxial seepage-stress coupling servo-control test system. , 2023, 42(S1): 3281-3292.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.0615 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/IS1/3281

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