1.河南省交通规划设计研究院股份有限公司,河南 郑州450099
2.湖南大学土木工程学院,湖南 长沙 410082
李 帅(1989-),男,博士。主要从事边坡工程分析方法及优化设计方面的研究。Email: shuai_li@hnu.edu.cn
收稿:2018-10-18,
修回:2018-12-17,
纸质出版:2020-12-15
移动端阅览
李帅,苏永华,杜俊旺.基于突变特征的边坡工程失稳判据研究[J].防灾减灾工程学报,2020,40(06):852-859.
LI Shuai,SU Yonghua,DU Junwang.Research on Instability Criterion of Slope Project based on Mutation Characteristics[J].Journal of Disaster Prevention and Mitigation Engineering,2020,40(06):852-859.
李帅,苏永华,杜俊旺.基于突变特征的边坡工程失稳判据研究[J].防灾减灾工程学报,2020,40(06):852-859. DOI: 10.13409/j.cnki.jdpme.2020.06.002.
LI Shuai,SU Yonghua,DU Junwang.Research on Instability Criterion of Slope Project based on Mutation Characteristics[J].Journal of Disaster Prevention and Mitigation Engineering,2020,40(06):852-859. DOI: 10.13409/j.cnki.jdpme.2020.06.002.
边坡系统时刻与外界环境进行着物质、能量和信息的交换,导致其失稳演化过程具有典型的非线性、非连续性特征,这是边坡工程稳定性难以准确评估的重要原因之一。结合非线性突变理论,以势函数为响应变量,破裂区长度为控制变量,构建边坡突变失稳分析模型,对边坡力学机制及突变模型特征进行分析,获得边坡发生突变失稳时的破裂区临界长度,量化边坡稳定状态判定依据,为边坡的稳定性评估提供一种新的可选路径。实例分析结果表明,基于所述方法得到的结果与实际情况间误差在工程上是可以接受的,验证了方法的可行性。
The exchange of mass, energy as well as information occurs incessantly between the slope system and the external environment, resulting in nonlinearity and discontinuity characteristics of in the evolutionary process of slope failure. These characteristics are important reasons why the stability of slope engineering is difficult to be assessed accurately. Combining with nonlinear mutation theory, the potential function was first set as the response variable and the fracture zone length was set as a control variable, then the analytical mutation failure model of the slope was established. The model features and mechanical mechanism of slopes were further analyzed. The critical length of the crack zone, which results in slope failure, was solved. The instability criterion of the slope was quantized. The research may provide a helpful reference for slope stability evaluation. The results of the case studies show that the error between results acquired by the proposed method and actual data is acceptable. The feasibility of the proposed method is verified.
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