海阳核电厂岩质边坡破坏模式及稳定性分析
摘要:对紧靠基坑边坡顶部边缘有大型吊装设备、吊装荷载较大以及走向呈弧形的海阳核电厂核岛岩质基坑边坡从定性和定量两个方面进行了稳定性分析。根据场地的地层岩性和地质构造特征,采用赤平投影方法对该边坡发生平面滑动、楔形体破坏和倾倒破坏模式进行了定性分析,初步确定了边坡区域可能发生某种形式破坏的区域范围。在此基础上,对最可能发生平面滑动和楔形体破坏的区域采用极限平衡法对边坡稳定性进行了定量分析,并对采用锚杆加固后的边坡采用极限平衡法进行了稳定性定量分析。分析研究表明:①该边坡不同区域可能发生边坡破坏的模式不同,相比其他破坏模式,岩质边坡发生楔形体破坏的可能性最大;②锚杆对提高楔形体的稳定性效果较为明显,特别是对于欠稳定的楔形体,施加锚杆可以明显提高其稳定性。
Abstract:The stability analysis of the rock pit slope belong to Nuclear island in Haiyang Nuclear Power Plant is carried out by qualitatively and quantitatively.There is a large-scale hoisting equipment with large loading load on the top edge of the rock pit slope.The strike of the slope is cambered.Firstly,according to the stratum lithology and geological structure features of the site,the plane sliding,wedge failure and toppling failure of the slope are qualitatively analyzed by stereographic projection.The range and mode of failure may be determined preliminarily.On this basis,the means of the limit equilibrium,the stability of the plane sliding and wedge failure mode is analyzed quantitatively.The limit equilibrium is also used to analyze the stability of the slopes reinforced by anchors.Stated thus,the different failure modes may occur in different slope areas.The probability of occurrence of wedge failure is the greatest.The effect of the anchor rod on the stability of the wedge is obvious,especially for the less stable ones.
中文标题：
海阳核电厂岩质边坡破坏模式及稳定性分析
Failure Mode and Stability Analysis of Rock Slope in Haiyang Nuclear Power Plant
作者：
段永坤
Duan Yongkun
作者简介:段永坤,男,1984年生,汉族,内蒙古通辽人,工程师,主要从事岩土工程专业工作。E-mail:duanyongkun@snerdi.com.cn
通讯地址：
上海核工程研究设计院, 上海 200233
ShanghaiNuclearEngineeringResearchandDesignInstitute,Shanghai200233,China
中图分类号:TU457
doi:10.3969/j.issn.1007-2993.2017.03.008
出版物：岩土工程技术
收稿日期:2016-12-21
网络出版日期:2021-07-06
关键词:岩质边坡,失稳模式,结构面,稳定性
Key words:rock slope,unstable mode,structural plane,stability
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