土工基础

土工基础 ›› 2024, Vol. 38 ›› Issue (5): 883-888.

• 测试技术 • 上一篇    

膨胀土渠坡失稳的变形监测及预警方法研究

甘旭东1，刘 军2，胡 波2，姜世明1，张小雨1，张振山1   

  1. （1.安徽省引江济淮集团有限公司，合肥 230000；2.长江科学院 水利部岩土力学与工程重点实验室，武汉 430010）
  • 收稿日期:2024-04-02 修回日期:2024-05-14 出版日期:2024-10-31 发布日期:2024-10-23
  • 通讯作者: 胡波(1980-)，男，正高级工程师，博士，研究方向为特殊土、非饱和土与环境岩土工程等。
  • 作者简介:甘旭东（1987-），男，高级工程师，硕士，研究方向为特殊土研究及科研管理。
  • 基金资助:
    中央级公益性科研院所基本科研业务费项目（CKSF2023327/YT）；安徽省引江济淮工程科技创新项目（YJJH-ZT-ZX-20230118528）

Early Warning Method for the Instability of Expansive Soil Canal by Slope Deformation Monitoring

GAN Xudong1, LIU Jun2, HU Bo2, JIANG Shiming1, ZHANG Xiaoyu1, ZHANG Zhenshan1   

  1. (1.Anhui Provincial Group Limited for YangtzetoHuaihe Water Diversion, Hefei 230000;
    2.Changjiang River Scientific Research Institute, Key Laboratory of Geotechnical Mechanics and Engineering, Ministry of Water Resources, Wuhan 430010)
  • Received:2024-04-02 Revised:2024-05-14 Online:2024-10-31 Published:2024-10-23

摘要： 膨胀土渠坡的稳定与变形密切相关，滑坡预警预报是地质工程界研究的热点。在国内某大型输水渠道工程膨胀土试验段2年多现场试验期间，多处渠坡产生滑动，现场采用测斜仪对边坡内部变形进行监测。根据监测成果及现场调查分析，对滑坡从开始变形到失稳破坏全过程中的变形发展规律进行了分析和研究。在深入分析膨胀土渠坡稳定与变形的基础上，提出将变形速率、累计变形量作为膨胀土渠坡失稳的主要预警指标，将变形发展时间、外部环境的变化和渠坡的响应等作为参考指标，并提出了膨胀土渠坡滑动的预测和预警方法，为合理评定膨胀土渠坡的安全状态、评价和预测工程安全提供了参考。

关键词: 膨胀土, 试验段, 渠坡失稳, 变形监测, 预警方法

Abstract: The stability and the deformation of the expansive soil canal are closely related to each other. Several landslides occurred during more than 2 years of the expansive soil tests in a large water diversion engineering project. The inclinometer was used in the in-depth lateral deformation monitoring. Based on the analysis on the extrinsic and intrinsic connections between the stability and the deformation of an expansive soil canal, it is suggested that the deformation rate and the accumulative displacement are the main early warning indices, and the development time of the deformation, the change of environment and the response of the slope are the reference indices in distinguishing the expansive soil canal instability. Moreover, the forecast and the early warning method of the expansive soil landslide is proposed, which provides a reference for the rational evaluation of the safety state and the development trend of expansive soil canal slopes.

Key words: Expansive Soil, Test Section, Canal Slope Sliding, Deformation Monitoring, Early Warning Method

中图分类号: