地质和水文地质环境对保加利亚东北部图特拉坎地区滑坡稳定性评估的影响

IF 1.3 4区 工程技术 Q3 ENGINEERING, GEOLOGICAL Quarterly Journal of Engineering Geology and Hydrogeology Pub Date : 2023-07-27 DOI:10.52321/igh.37.1.47
Lyubomir Angelov, Tanya Vasileva
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引用次数: 0

摘要

本文主要对多瑙河右坡下段的稳定性进行了评价。该研究区位于保加利亚东北部的图特拉坎镇。本研究调查了由于城镇供水和排水网络的建设工程而激活滑坡过程的可能性,以及该地区自然地质和水文地质环境的影响。研究区域是多瑙河平原的一部分。地下水位位于地表以下7至26米之间,位于上新世的砂质沉积物和石灰石中,形成半承压至非承压含水层。它们主要是由降水通过黄土层入渗形成的。地下水的排放是自然的和技术的,通过一个人字形的排水系统建在滑坡马戏团的脚趾向多瑙河。对边坡稳定性进行了不同假设的评估-自然(重大-包括现有建筑物),施工(包括挖掘),主要和特定(包括地震力)组合应力。考虑地下水的影响、不同失稳因素的影响和地震的影响,不同的地球动力学模型表明,边坡及其研究断面—滑坡圆环处于稳定状态,其安全系数为Fs > 1。根据变形机理,根据滑移带的深度,将滑坡划分为平移型滑坡和深埋型滑坡。他们是当代的,目前很活跃。该研究证实了该地区滑坡块体起源的假设,该滑坡块体是由黄土物质和上新世粘土混合形成的。地下水位直接关系到滑坡边坡的稳定现状。
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Influence of geological and hydrogeological settings in assessing the stability of a landslide slope in the Tutrakan area, Northeastern Bulgaria
The study is focused on the assessment of the stability of the lower part of the right slope of the Danube River. The research area is situated in the town of Tutrakan, Northeastern Bulgaria. The present study investigates the likelihood of activating landslide processes due to construction works on the water supply and sewerage network of the town, as well as the influence of the natural geological and hydrogeological settings of the region. The research area is part of the Danubian Plain. The groundwater level lies between 7 and 26 m below the surface, in the sandy sediments and limestones of the Pliocene that form the semi-confined to unconfined aquifer. They are mainly formed by infiltration of precipitation through the loess layer. The groundwater discharge is carried out naturally and technogenically towards the Danube, through a herringbone system of drains built in the toe of the landslide cirques. The assessment of the slope stability was made for the different hypotheses – natural (momentous – including the existing buildings), constructional (including excavations), primary and specific (including seismic forces) combination of stresses. The different geodynamic models, taking into account the influence of groundwater, the influence of different destabilizing factors and seismic impact, show that the slope, as well as the studied sections of it – the landslide cirques, are in a stabilized state, with safety coefficients (Fs > 1). According to the mechanism of deformation, the landslides are classified as a translational slide, and deep seated according to the depth of the slip zone. They are contemporary and currently active. The study confirms the hypothesis of the origin of the landslide masses in the area, formed as a mixture of loess material and Pliocene clays. The groundwater level is directly related to the current state of the landslide slope stability.
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来源期刊
CiteScore
3.40
自引率
14.30%
发文量
66
审稿时长
6 months
期刊介绍: Quarterly Journal of Engineering Geology and Hydrogeology is owned by the Geological Society of London and published by the Geological Society Publishing House. Quarterly Journal of Engineering Geology & Hydrogeology (QJEGH) is an established peer reviewed international journal featuring papers on geology as applied to civil engineering mining practice and water resources. Papers are invited from, and about, all areas of the world on engineering geology and hydrogeology topics. This includes but is not limited to: applied geophysics, engineering geomorphology, environmental geology, hydrogeology, groundwater quality, ground source heat, contaminated land, waste management, land use planning, geotechnics, rock mechanics, geomaterials and geological hazards. The journal publishes the prestigious Glossop and Ineson lectures, research papers, case studies, review articles, technical notes, photographic features, thematic sets, discussion papers, editorial opinion and book reviews.
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