土工基础

土工基础 ›› 2024, Vol. 38 ›› Issue (5): 811-815.

• 专题论述 • 上一篇    下一篇

考虑空间变异的梯田稳定性分析

陈佳俊1，吴 恺2，戎科锦1，陈志远1，李秉宜1   

  1. （1.苏州科技大学 土木工程学院，江苏苏州 215009；2．苏州旭杰绿建装配式设计有限公司，江苏苏州 215004）
  • 收稿日期:2022-07-06 修回日期:2022-12-01 出版日期:2024-10-31 发布日期:2024-10-23
  • 通讯作者: 李秉宜（1990-），男，博士，讲师，研究方向为地基处理与路基工程。
  • 作者简介:陈佳俊（2001-），男，本科，研究方向为工程力学。
  • 基金资助:
    大学生创新创业训练计划项目（项目编号：202110332037Y）

Stability Analysis of Terraced Farm Field Considering Spatial Variability

CHEN Jiajun1, WU Kai2, RONG Kejin1, CHEN Zhiyuan1, LI Bingyi1   

  1. (1.School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215009;
    2.Suzhou Xujie Fabricated Greenbuild Co. Ltd., Suzhou 215004）
  • Received:2022-07-06 Revised:2022-12-01 Online:2024-10-31 Published:2024-10-23

摘要： 降雨入渗会影响土体稳定性，最终可能导致梯田滑坡，研究降雨入渗下的梯田边坡稳定性具有较高的社会和经济效益。以随机场理论为基础，采用有限元极限分析与强度折减法相结合，通过计算得到梯田安全系数、失效概率和失稳风险，对降雨作用下梯田稳定可靠性进行分析。研究结果表明：传统的确定性分析采用唯一的安全系数评价边坡稳定性，但同一安全系数可能对应多个滑面形式和滑坡体量，容易高估边坡安全储备。基于随机场理论，将边坡安全系数、失效概率和失效风险相结合对边坡稳定性进行综合评价，能够更合理地评估边坡失稳风险。


关键词: 降雨入渗, 边坡稳定性, 随机场, 梯田边坡

Abstract: The rainfall infiltration will affect the soil stability, which may eventually lead to terraced farm field landslides and the crop yield reduction. Therefore, it is of high social and economic benefits to study the stability of the terraced farm field slopes under the rainfall infiltration. In this study, based on the random field theory, the finite element limit analysis combined with the strength reduction method is used to analyze the reliability of the terraced farm field stability under the rainfall by evaluating the terraced farm field factor of safety, the failure probability, and the destabilization risk. The results show that the traditional qualitative analysis does use a unique factor of safety to evaluate the stability of slopes, but the same factor of safety may correspond to multiple slip surface forms and landslide volumes, which is easy to overestimate the safety reserve of these slopes. Based on the random field theory, the slope stability is evaluated comprehensively by combining the slope factor of safety, the failure probability and the failure risk, which can more reasonably assess the risk of terraced farm field slope instability.

Key words: Rainfall Infiltration, Slope Stability, Random Field, Terraced Farm Field Slopes

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