膨胀土边坡生态防治技术分析

IF 2 3区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Frontiers in Earth Science Pub Date : 2024-08-22 DOI:10.3389/feart.2024.1453178

Wenbing Tao, Yingwen Wen, Xia Bian, Zhilin Ren, Long Xu, Fei Wang, Hu Zheng

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引用次数: 0

摘要

针对江淮地区膨胀土边坡处置前忽视膨胀软弱缺陷和边坡处置后长期稳定性差的现状。本研究探讨了生态护坡技术应对膨胀土边坡失稳地质灾害的能力。以江淮地区高速公路沿线膨胀土边坡加固工程为基础，分析江淮地区软弱膨胀土边坡崩塌原因，结合工程实际研究，提出 "蓄抗式 "水调节生态防治技术。从生态护坡技术的原理、影响因素等方面探讨了生态护坡技术的可行性和可持续性，并结合数值模拟和现场试验方法验证了护坡效果。研究结果表明，"蓄阻 "技术能有效阻止雨水下渗，特别是在小雨条件下，具有持续阻挡能力。在暴雨条件下，它能阻止雨水下渗大约 4 小时，大大提高了边坡的稳定性。坡度变化对加固后的边坡稳定性没有明显影响，最大变形发生在降雨后的坡脚处。加固计划应优先加强坡脚的支撑。正确选择和优化技术参数可以带来更经济、更可持续的解决方案，同时延长保护时间。实地试验证实了 "蓄拦 "水调节生态控制技术在江淮地区的适用性，特别是在多小雨的地区。这些研究结果表明，膨胀土边坡生态治理技术可有效调节边坡水分变化，降低膨胀土边坡失稳的地质灾害风险。

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Analysis of ecological prevention and control technology for expansive soil slope

For the expansion soil slope in the JiangHuai area before the disposal of the neglect of expansion of the weak defects and slope disposal after the poor long-term stability of the current situation. This study investigates the ability of ecological slope protection technology to cope with the destabilizing geohazard of expansive soil slopes. Analyzing the collapse reasons of weak expansive soil slopes in the JiangHuai region based on the reinforcement project of expansive soil slopes along highways in the JiangHuai region, combined with actual engineering research, a “storage-resistance” water regulation ecological prevention and control technology is proposed. The feasibility and sustainability of the ecological slope protection technology is discussed in terms of its principles and influencing factors, and the protection effect is verified by combining numerical simulation and field test methods. Research findings suggest that the “storage-resistance” technology effectively prevents rainwater infiltration, particularly under light rain conditions, with continuous blocking capability. Under rainstorm conditions, it can prevent infiltration for about 4 h, significantly enhancing slope stability. Slope rate variations show no significant impact on reinforced slope stability, with maximum deformation occurring at the slope’s foot after rainfall. Reinforcement plans should prioritize strengthening support at the slope’s base. Proper selection and optimization of technical parameters can lead to more economical and sustainable solutions while extending protection time. Field trials confirm the suitability of the “storage and blocking” water regulation ecological control technology for the JiangHuai region, particularly where light rain prevails. These findings suggest that ecological control techniques for expansive soil slopes can effectively regulate slope moisture changes and reduce the geohazard risk of expansive soil slope instability.

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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.