Quantitative study on toppling deformation zoning of antidip rock slope under different soft and hard rock conditions

IF 2 3区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Frontiers in Earth Science Pub Date : 2024-09-06 DOI:10.3389/feart.2024.1447578

Junchao Cai, Jiangtao Liu, Jie Zhang, Junping Wang, Shuo Zhang, Guoqing Qi

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引用次数: 0

Abstract

Toppling deformation can be classified into deep toppling (DT) and shallow toppling (ST) based on deformation mechanisms and development depth of rock mass under different soft and hard rock conditions. Currently, the toppling zoning indicators and quantitative criteria are not uniform, and human factors have a significant influence on the toppling zoning indicators. Summerizing and analyzing the existing toppling cases and toppling zoning researches, this study selects rock layer toppled angle, maximum tension within layer, unit tension within layer, and longitudinal wave velocity as indicators for toppling zoning. Considering the differences in the characteristics of deep toppling (DT) and shallow toppling (ST), the quantitative criteria for the deep and shallow toppling zoning indicators are determined respectively. This study employs the Analytic Hierarchy Process (AHP) and fuzzy comprehensive evaluation method to establish toppling zoning evaluation models. The deep toppling dam site slope at Miaowei hydropower station and the shallow toppling bank slope of Xingguang Ⅲ formation at Xiluodu Hydropower Station were tested, respectively. These results are compared with toppling zoning of field surveys to verify the rationality and applicability of the models. This achievement holds significant reference value for the toppling zoning of rock masses in engineering slopes, especially in the construction, development, and engineering management of toppling slopes.

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不同软硬岩条件下反斜面岩石边坡倾覆变形分区的定量研究

根据不同软硬岩条件下岩体的变形机理和发育深度，可将顶板变形分为深顶板（DT）和浅顶板（ST）。目前，顶板分区指标和量化标准不统一，人为因素对顶板分区指标影响较大。通过对已有的冒顶案例和冒顶分区研究进行归纳和分析，本研究选取岩层冒顶角度、层内最大拉力、层内单位拉力和纵波速度作为冒顶分区指标。考虑到深层冒顶（DT）和浅层冒顶（ST）特征的差异，分别确定了深层和浅层冒顶分区指标的量化标准。本研究采用层次分析法（AHP）和模糊综合评价法建立了推移分区评价模型。分别对庙尾水电站坝址深冲坡和溪洛渡水电站星光Ⅲ级地层浅冲岸坡进行了试验。这些结果与野外调查的顶板分区进行了对比，验证了模型的合理性和适用性。该成果对工程边坡岩体的崩落分区，特别是崩落边坡的建设、开发和工程管理具有重要的参考价值。

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来源期刊

Frontiers in Earth Science Earth and Planetary Sciences-General Earth and Planetary Sciences

CiteScore

3.50

自引率

10.30%

发文量

2076

审稿时长

12 weeks

期刊介绍： Frontiers in Earth Science is an open-access journal that aims to bring together and publish on a single platform the best research dedicated to our planet. This platform hosts the rapidly growing and continuously expanding domains in Earth Science, involving the lithosphere (including the geosciences spectrum), the hydrosphere (including marine geosciences and hydrology, complementing the existing Frontiers journal on Marine Science) and the atmosphere (including meteorology and climatology). As such, Frontiers in Earth Science focuses on the countless processes operating within and among the major spheres constituting our planet. In turn, the understanding of these processes provides the theoretical background to better use the available resources and to face the major environmental challenges (including earthquakes, tsunamis, eruptions, floods, landslides, climate changes, extreme meteorological events): this is where interdependent processes meet, requiring a holistic view to better live on and with our planet. The journal welcomes outstanding contributions in any domain of Earth Science. The open-access model developed by Frontiers offers a fast, efficient, timely and dynamic alternative to traditional publication formats. The journal has 20 specialty sections at the first tier, each acting as an independent journal with a full editorial board. The traditional peer-review process is adapted to guarantee fairness and efficiency using a thorough paperless process, with real-time author-reviewer-editor interactions, collaborative reviewer mandates to maximize quality, and reviewer disclosure after article acceptance. While maintaining a rigorous peer-review, this system allows for a process whereby accepted articles are published online on average 90 days after submission. General Commentary articles as well as Book Reviews in Frontiers in Earth Science are only accepted upon invitation.