边坡对固体潮等日周期变化因子的响应及其稳定性研究

项目名称： 边坡对固体潮等日周期变化因子的响应及其稳定性研究

项目编号： No.41272313

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 陈征宙

作者单位： 南京大学

项目金额： 72万元

中文摘要： 滑坡是仅次于地震的第二大地质灾害。滑坡的时间分布规律的研究是当前滑坡研究的热点之一。我们在初步研究工作中，收集大量已有的滑坡数据并加以统计，统计结果显示，滑坡在日周期分布显著不均，其中凌晨三点时段及下午点时段频率较高。滑坡发生的具体时间的触发因素具有经常发生，作用较小，动力效应明显的特点。而目前关于滑坡的固体潮、地脉动及大气压力等因素导致的日周期规律与动力相应方面的研究比较缺乏。本课题以现场测试、振幅分析与频谱分析为手段，在分析固体潮、地脉动与大气压力等日周期因子的基础上，着重探讨它们与边坡坡体应力变形之间的相关关系以及它们的内在联系，并进一步研究边坡的变形和应力对上述周期性因子的动力响应以及各因子对边坡稳定性的敏感性，最终在传统极限平衡分析的基础上，建立相应的计算模型，提出考虑日周期性因子的边坡稳定性分析和评价方法。这一项目的开展将有助于深化对边坡破坏机理的认识，推进边坡理论研究。

中文关键词： 滑坡；周期性；固体潮；稳定性；

英文摘要： Landslide is the second largest geological disasters after earthquake. The time distribution law of landslide is one of the focuses of the current landslid eresearch. In the preliminary study, we collected a large number of existing landslide data, the statistics show that the daily cycle distribution of landslides is significantly uneven, the frequency of landslide in three o'clock in the morning and 14 o'clock in the afternoon is more higher than other time sessions. The triggering factors, which has relationship with the time landslide happened, has distinct characteristic, that is high frequency, small force, and obvious dynamic effects. However, there were seldom researches on the daily cycle law and dynamic effects of landslide triggered by earth tide, ground pulsation and atmospheric pressure, etc. The subject will take field testing, amplitude analysis and spectral analysis as a means, to analyze the earth tide, ground pulsation and atmospheric pressure, then put focus on the relationship between the stress, deformation and the factors above. In the further, the dynamic response of slope on the factors above will be researched, the sensitivity of different factor to the stability of slope will also be discussed in this subject. Finally, the corresponding model, used to calculate the safety factor of sl

英文关键词： Landslide；cycle distribution；earth tide；stability；