花岗岩孤石的稳定性评价研究

Study on Stability Assessment of Spheric Granite Boulders

珠江三角洲地区很多花岗岩山区的地表分布有大量的孤石,并时有孤石崩塌现象发生,花岗岩山区地表孤石的稳定性越来越受到珠江三角洲地区政府和民众的关注,因此对其稳定性的研究十分紧迫。分析研究其稳定性的内在因素和外部因素,提出适用于花岗岩山区地表单体孤石稳定性的定性评价方法;将孤石的主要破坏模式划分为滑移、倾倒、坠落三种,在现有的边坡稳定性计算方法的基础上提出倚靠于土坡、单侧临空的单体孤石抗滑移、抗倾覆稳定性计算方法。

Many granite mountainous areas in the Pearl River Delta Region have numerous boulders on the surface.Considering the risk of some of them falling from time to time.The stability of surface lonestones in granite mountain areas has attracted more and more attention from the government and the people of the Pearl River Delta.Therefore,it is urgent to study the stability of boulders on the earth's surface in the granite areas.In this study,the authors analyse the internal and external factors influencing the stability of boulders on the earth's surface in the granite areas,then propose a qualitative boulder stability assessment method suitable for use in granite areas.The main failure modes of the solitary rock are divided into three types:sliding,dumping and falling.On the basis of the existing calculation methods of slope stability,a calculation method of anti-sliding and anti-overturning stability of the single solitary rock relying on the soil slope and the single side free is proposed.