Deterioration Mechanism and Statistical Damage Constitutive Model of Red-Bed Soft Rock with Different Moisture Content

IF 1.9 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

pure and applied geophysics Pub Date : 2024-12-13 DOI:10.1007/s00024-024-03609-7

Yizhe Wu, Huanling Wang, Yanjie Zhang, Changhao Lyu, Yuxuan Liu, Wenxiu Wang

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引用次数: 0

Abstract

The mechanical properties of red-bed soft rock, commonly encountered in the Central Yunnan Water Diversion Project, deteriorate significantly upon contact with water, impacting the project’s safety. This study investigates the effects of moisture content on the mechanical properties of red-bed soft rock by conducting triaxial compression tests under varying confining pressure. Degradation mechanisms associated with different moisture content levels are identified, and deformation and deterioration mechanisms are examined through mineral compositions using X-ray diffraction. Modifications to the Drucker-Prager criterion are explored to incorporate the Lode parameter. Using the Weibull distribution, a statistical damage constitutive model for red-bed soft rock is established. The triaxial compression test results of red-bed soft rock are used for model validation, demonstrating a strong agreement between the theoretical model and empirical findings, confirming its suitability for analyzing the mechanical behavior of red-bed soft rock under varying moisture content. The findings of this paper provide valuable insights for investigating large deformations in red-bed soft rocks within the context of Central Yunnan Water Diversion Project.

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不同含水率红层软岩劣化机理及统计损伤本构模型

滇中引水工程中常见的红层软岩在与水接触后力学性能明显恶化，影响工程安全。通过不同围压条件下的三轴压缩试验，研究了含水率对红层软岩力学性能的影响。确定了与不同含水量水平相关的降解机制，并使用x射线衍射通过矿物成分检查变形和变质机制。对Drucker-Prager准则进行了修改，以纳入Lode参数。利用威布尔分布，建立了红层软岩的统计损伤本构模型。利用红层软岩三轴压缩试验结果对模型进行验证，结果表明理论模型与经验结果吻合较好，证实了该模型对分析不同含水率下红层软岩力学行为的适用性。本文的研究结果为研究滇中引水工程背景下红层软岩的大变形提供了有价值的见解。

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来源期刊

pure and applied geophysics 地学-地球化学与地球物理

CiteScore

4.20

自引率

5.00%

发文量

240

审稿时长

9.8 months

期刊介绍： pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.