摘要
降雨入渗对弃渣场稳定性的不利影响具有普遍性,有关规范对连续降雨期弃渣场稳定计算的工况等未作具体规定,各设计、评估单位采用的计算方法不尽一致,为此,对降雨入渗情况下弃渣场稳定计算方法进行了探讨。通过对降雨特征进行分析,认为对季风气候区的弃渣场均应核算连续降雨期边坡的抗滑稳定性。在进行降雨入渗条件下的弃渣场稳定分析计算时,可首先基于水量平衡关系,采用水文分析法计算设计标准暴雨的降雨入渗量,然后将降雨入渗工况计算条件概化成弃渣场上层为连续降雨造成的饱和土、下部仍为自然状态,根据降雨入渗量计算饱和土层的厚度,最后按照地质勘察资料中的天然土、饱和土物理力学参数,采用摩根斯顿-普莱斯法计算降雨入渗条件下弃渣边坡的抗滑稳定安全系数。对南水北调中线一期工程鹤壁段某弃渣场进行实例分析计算,表明该方法具有较好的可操作性,可供类似工况条件下弃渣场稳定计算时参考。
Generally,rainfall infiltration has adverse effect on the stability of spoil ground,however,there is a lack of relevant specifications for the specific working conditions of the stability calculation of spoil ground in the continuous rainfall period,the calculation methods adopted by various design institutes and evaluation units are inconsistent.Therefore,it is necessary to study the stability calculation method of spoil ground under the condition of rainfall infiltration.Based on the analysis of the rainfall characteristics,it was considered that the anti⁃sliding stability of the slope in the continuous rainfall period should be calculated for the spoil ground in the monsoon climate area.When analyzing and calculating the stability of spoil ground under the condition of rainfall infiltration,the rainfall infiltration amount of the rainstorm under the design standard could be calculated by the hydrological analysis method based on the water balance relationship,then the calculation con⁃dition of rainfall infiltration condition was generalized as the saturated soil caused by continuous rainfall in the upper layer of spoil ground,and the lower layer of spoil ground was still in natural state,the thickness of saturated soil layer was calculated according to the rainfall infil⁃tration,finally,according to the physical and mechanical parameters of natural soil and saturated soil in the geological survey data,the Mor⁃genston Price method was used to calculate the safety factor of anti⁃sliding stability of spoil ground under the condition of rainfall infiltration.Based on the analysis and calculation of the spoil ground in Hebi section of the first phase of the Middle Route of South⁃to⁃North Water Trans⁃fer Project,it is shown that the method has good operability and can be used as a reference for the stability calculation of spoil ground under similar working conditions.
作者
姜楠
朱天平
赵继伟
张立强
JIANG Nan;ZHU Tianping;ZHAO Jiwei;ZHANG Liqiang(Henan Water&Power Engineering Consulting Co.,Ltd.,Zhengzhou 450016,China;Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China;North China University of Water Resources and Electric Power,Zhengzhou 450046,China)
出处
《人民黄河》
CAS
北大核心
2020年第10期96-99,103,共5页
Yellow River
关键词
季风气候区
降雨入渗
弃渣场
稳定计算
水土保持
monsoon climate area
rainfall infiltration
spoil ground
stability calculation
soil and water conservation
