中国山西泽州带垫层和软弱层岩石中滑坡形成的蠕变机理

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2024-11-20 DOI:10.1007/s10064-024-04002-3

Zhiqiang Yi, Jianhui Long, Wenhui Shi, Hongyan Yan, Jining Zhang, Wenjun Bi, Yuqi Jin

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引用次数: 0

摘要

在具有垫层和软弱层的岩石中形成的滑坡威胁着中国黄河流域的环境安全。进一步研究这类滑坡的蠕变机制将有助于评估其稳定性。本研究将实地调查、数据监测、基本参数测试和膨胀压力测试相结合。详细分析了自然降雨条件下山西泽州罗泉（LQ）滑坡的破坏特征和机理。在气象降雨集中期，罗泉滑坡持续发生蠕变变形。自然降雨是 LQ 滑坡长期蠕变变形的主要诱发因素。随着滑动带饱和度和饱和时间的增加，LQ 滑坡的蠕变变形是由抗剪强度的减弱和滑动带的扩展引起的，导致道路和建在表面的房屋出现裂缝。当自然降雨量减少时，滑动带的削弱、软化和膨胀机制减弱。LQ 滑坡的稳定性增强，蠕变变形逐渐停止。目前，LQ 滑坡的蠕变变形率正在增加，有可能发展为完全失稳。因此，需要继续对 LQ 滑坡进行现场监测。

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Creep mechanism of landslide formation in rock with bedding and weak layers in Zezhou, Shanxi, China

Landslides formed in rock with bedding and weak layers threaten the environmental safety of the Yellow River Basin in China. Further study of the creep mechanism of such landslides will help to evaluate their stability. In this study, field investigation, data monitoring, basic parameter tests, and expansion pressure test are combined. The failure characteristics and mechanism of the Luoquan (LQ) landslide in Zezhou, Shanxi, China, under natural rainfall conditions are analyzed in detail. The creep deformation of the LQ landslide occurred continuously during the period of meteorological rainfall concentration. Natural rainfall was the main triggering factor of the long-term creep deformation of the LQ landslide. With increasing saturation degree and time of the slide zones, the creep deformation of the LQ landslide was caused by weakening of the shear strength and expansion of the slide zones, causing cracks in roads and houses built on surfaces. When the natural rainfall decreased, the weakening, softening, and expansion mechanism of the slide zones weakened. The stability of the LQ landslide increased, and the creep deformation gradually stopped. As of now, the creep deformation rate of the LQ landslide, currently increasing, is likely to develop into complete destabilization. Therefore, the on-site monitoring of the LQ landslide needs to be continued.

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.