摘要
在对边坡进行条分法稳定性分析时,一般情况下滑动面形状是复杂的。根据底滑面倾斜方向的不同,在条分后会出现顺坡条块和反坡条块。依据二者对边坡稳定性的作用效果不同,顺坡条块和反坡条块也可称为致滑条块及阻滑条块。虽然人们承认反坡条块的阻滑作用,但传统条分法在求解过程中并未对这2类条块进行区分,求解公式中反坡条块重力分力仍作为分母下滑力项计算。若对2类条块有所区分,将反坡条块重力分项作为分子中阻滑力项计算,显然会有不同的计算结果。对于2种计算方式的差异程度及其对计算结果的影响,进而对边坡稳定性评估的影响,至今缺乏理论上的分析。本文通过对传统条分法安全系数求解公式中2类条块进行区分,分析将反坡条块重力作为阻滑力的计算结果与传统公式的计算结果的差异,并通过推导获得2种计算方式之间的规律和特点,探讨2种计算方式对滑动面含反坡的边坡稳定性分析的适用性。研究结果可为传统条分法忽视正、反坡差异的计算方式提供有益的补充。
Due to the complexity of sliding surface,there may be reverse slope in real slope according to the different inclined direction of bottom sliding surface.Accordingly,the slices can be classified as bedding slope slices and reverse slope slices.Due to the effect on the slope stability is different,bedding slope slices and reverse slope slices can also be called sliding slices and anti-sliding slices.Although the effect of anti-sliding slices on slope is recognized,many traditional slices methods do not distinguish the two kinds of slices in the solution process.In the formula,gravity force of the anti-slope slice is still calculated as sliding force term in the denominator.If the two are treated differently and gravity force of the anti-slope slice is calculated as the antislope force term in the numerator,the calculation results will obviously be different.There is no theoretical analysis of the difference between the two calculation methods and influence on the calculation results.In this paper,the formula of safety coefficient was modified and the two kinds of slices were treated differently in the formula,so as to analyze the difference between the calculation results of reverse slope slices gravity as sliding resistance force and that of the traditional formula.The rules and characteristics of the two calculation methods were obtained through reasonable mathematical derivation,and applicability of the two calculation methods was analyzed.The work of this paper is a useful supplement to the traditional method which ignores the difference between bedding and reverse slope slices,and discusses the applicability of two calculation methods for slope stability analysis with reverse slope in sliding surface.
作者
陈文胜
蒋茂林
周伟
丁博
CHEN Wensheng;JIANG Maolin;ZHOU Wei;DING Bo(School of Civil Engineering,Changsha University of Science and Technology,Changsha 410114,China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2021年第7期1756-1763,共8页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(51778067)。
作者简介
通信作者:陈文胜(1966−),男,江西萍乡人,教授,从事岩土工程教学与科研工作,E−mail:13319504070@126.com。
