某石灰岩矿山排土场的稳定性分析评价  

Stability Evaluation of the Waste Soil Dump Site for a Limestone Quarry in Jinan

作　　者：孟燕[1] 王倩[1] MENG Yan;WANG Qian(Shandong Branch of China National Geological Exploration Center of Building Materials Industry,Jinan 250100)

机构地区：[1]中国建筑材料工业地质勘查中心山东总队,济南250100

出　　处：《土工基础》2022年第2期149-153,共5页Soil Engineering and Foundation

摘　　要：以某矿山排土场为例,论述其稳定性的影响因素和存在问题。通过现场地质调绘、钻孔勘察、重型动力触探和填土重塑试验等技术方法,确定了排弃物分层结构、粒度分布规律、物理力学性质及排土场的地基条件,最后对排土场的稳定性进行综合分析和评价,并提出治理建议方案。排弃物中碎石成分的块度自上而下总体逐渐增大;地基为中风化石灰岩,浅部岩溶裂隙充填含碎石黏土,深部岩溶发育渐弱,地基稳定。将排土场划分为Ⅰ至Ⅳ号边坡,分析确定滑动模式属于排土本体(内部)近程滑动模式,适用Bishop圆弧法,所得安全系数均在0.8~1.0之间,基本都不稳定。研究内容以期为类似排土场的稳定性分析与评价提供一定参考。This paper presents a case study of the stability evaluation of a waste soil dump site of a limestone quarry.The influencing factors of the stability are evaluated.The hierarchical structure,particle-size distribution of soils,the physico-mechanical property of waste soils,and the subsurface conditions of the dump site were obtained by technical means of geological mapping,geotechnical test borings,the heavy dynamic penetration tests and the laboratory tests on the remolded waste soils.Ultimately,the stability analysis and evaluation for this dump site were performed,and stability mitigation measures were proposed.In waste soils,the size of the crushed stone is gradually increased from the top to the bottom.The subsurface condition at the bottom of the dump site consists of moderately weathered karstic limestone with gravelly clay filled rock fissures at shallow karstic rock mass.Therefore,the foundation of the dump site is stable.The slopes within the dump site could be divided into four(4)different categories with the failure mode of short-range sliding mode within the waste soil body.The factor of safety is between 0.8 and 1.0 for all slopes by using Bishop Simplified Method,which indicate that the slopes are instable.

关 键 词：排土场 排土工艺 粒度分布 近程滑动模式 简化BISHOP法 稳定性分析评价 

分 类 号：P642[天文地球—工程地质学]