超高填方边坡稳定性评价及防治对策研究--以城口县漆树坡建筑渣场填方边坡为例

The Study on Stability Evaluation and Prevention Countermeasures of Super-high Filling Slope——Taking Qishupo Filling Slope in a Building Waste Field in Chengkou County as an Example

山地及丘陵地区因其地形起伏较大,在工程建设时常形成超高填方边坡,该类边坡高度大、变形破坏机制复杂、受施工质量影响较大,所以治理难度大。以城口县漆树坡建筑渣场填方边坡为例,对超高填方边坡稳定性评价及治理方案进行研究。根据该边坡的实际情况,采取了极限平衡法的整体稳定性计算与土体内部稳定性计算相结合的计算模式,根据稳定性分析,结合渣场边坡特征、影响因素以及保护对象的重要性,最终确定了整体支挡、坡面防护、排水箱涵及坡面水平排水孔等多种排水措施相结合的综合治理方案,并实施水位监测孔的风险管控措施。

In mountainous and hilly areas,because of the large topography,super-high filling slopes are often formed in construction.The height of this kind of slopes is large.The mechanism of transform is more complicated,which is greatly influenced by the quality of construction and difficult to govern.This paper takes Qishupo Filling Slope in a building waste field of Chengkou County as an example to study the stability evaluation and control scheme of the super-high filling slopes.According to the actual situation of the slopes,the computing mode has been adopted based on limited equilibrium method with the combination of overall stability calculation and the inner stability in soil calculation.According to the stability analysis,combined with its slope characteristics,influencing factors and the importance of the protected object,a comprehensive governing scheme has been determined with various drainage measures such as the comprehensive control,holistic support,drainage box culvert,slope surface horizontal drainage hole and so on,combining with the risk management measures of water level monitoring holes.