CAJ | 학술논문

现阶段对排土边坡稳定性评价多以单因素等雨强为主，较难全面反映实际情况。针对此问题，以福建某排土边坡为例，通过Geo－studio软件对排土边坡进行不同雨强以及不同雨型条件下安全系数的时变分析，得出安全系数随时间变化曲线，并对排土坡稳定性产生较明显影响的雨强进行渗流场特性分析。时变分析结果表明，持续长时间的降雨会对边坡稳定性产生影响。降雨强度超过一定数值时，降雨的初始时刻安全系数下降速率主要取决于边坡自身渗透速率，在降雨中后期随着入渗速率的稳定，雨强又变成影响安全系数下降速率的主导因素。渗流特性分析结果表明，长时间的强降雨会引起坡脚处渗流方向的改变并在坡脚处出现溢出面，加上排土坡表层废石土较大渗透性的特点有可能形成管涌，应当引起重视。最后提出在废石土表层覆土压实以降低废石土的渗透性从而提高排土坡体稳定性的建议。
현계단대배토변파은정성평개다이단인소등우강위주，교난전면반영실제정황。침대차문제，이복건모배토변파위례，통과Geo－studio연건대배토변파진행불동우강이급불동우형조건하안전계수적시변분석，득출안전계수수시간변화곡선，병대배토파은정성산생교명현영향적우강진행삼류장특성분석。시변분석결과표명，지속장시간적강우회대변파은정성산생영향。강우강도초과일정수치시，강우적초시시각안전계수하강속솔주요취결우변파자신삼투속솔，재강우중후기수착입삼속솔적은정，우강우변성영향안전계수하강속솔적주도인소。삼류특성분석결과표명，장시간적강강우회인기파각처삼류방향적개변병재파각처출현일출면，가상배토파표층폐석토교대삼투성적특점유가능형성관용，응당인기중시。최후제출재폐석토표층복토압실이강저폐석토적삼투성종이제고배토파체은정성적건의。
Nowadays ,the analysis on waste accumulation slope is mainly based on single factors such as constant rain in-tensity ,which hardly reflects the actual situation .To solve this problem ,a waste accumulation slope in Fujian was cho-sen to be the test subject ,based on which the time-varying analysis of safety coefficient under different rain intensity and different types of rain was studied by using Geo-studio .And then the curves of the safety coefficient that changed with time were obtained ,as well as the analysis of the seepage characteristics of rainfall intensity that obviously affected the stability of the slope .The result of the time-varying analysis indicate that prolonged raining even the light rain will affect the stability of the slope;when the rainfall intensity exceeds a certain value ,the descending rate of the safety coefficient depends on the permeation rate of the slope in the initial time of the rainfall ,but the raininess becomes the main factor that causes the coefficient to descend as the permeation rate stables at the middle and late period of the rainfall .The re-sult of the seepage characteristic analysis suggest that prolonged strong rainfalls will result in the alteration of seepage di-rections and the occurrence of the overflow area at the heel of the slope ,which might turn into piping due to the strong permeation of the waste rocks and soil on the surface of the slope .So it is suggested to cover the waste rocks and soil with compacted earth in order to reduce the permeation and hence improve the stability of the slope .