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地震和暴雨是导致滑坡的主要因素。2008年5月12日四川省汶川地区发生8.0级强烈地震,此后截止到2008年6月10日14时,4.0级以上余震次数达到206次。本文以此为背景,通过在对杭州~兰州高速公路杏花村滑坡的工程地质条件、形态分布特征等勘测分析的基础上,采用传递系数法对边坡在天然、暴雨、暴雨+地震等3种工况的稳定性进行了计算分析,得出相应的稳定系数,并提出了合理有效的滑坡治理措施。研究表明:在暴雨和地震的共同作用下,滑坡稳定性急剧降低,极易发生失稳。此成果为该滑坡的有效防治提供了重要依据,同时也为公路边坡的后续研究提供了有价值的参考。
Earthquakes and heavy rainfall are the main factors that cause landslides. On May 12, 2008, there was a strong 8.0 magnitude earthquake in Wenchuan, Sichuan Province. After that, as of 14 o’clock on June 10, 2008, the number of aftershocks above Grade 4.0 reached 206. Based on the above analysis, based on the survey and analysis of the engineering geological conditions and the morphological distribution of Xinghuacun landslide from Hangzhou to Lanzhou expressway, the paper uses the transfer coefficient method to analyze the influence of the slope on natural, rainstorm, rainstorm and earthquakes The stability of the working conditions are calculated and analyzed, the corresponding stability coefficients are obtained, and reasonable and effective landslide control measures are put forward. The research shows that under the joint action of heavy rainstorm and earthquake, the stability of landslide decreases sharply and instability is easily occurred. This result provides an important basis for the effective prevention and control of the landslide, and also provides a valuable reference for the follow-up study of highway slopes.