摘要
GEO-Slope/W软件可综合考虑地下水、土体裂缝、坡顶堆载等因素,能够对复杂土层、任意滑动面形状及多种孔隙水压力状况建立二维计算模型分析边坡的稳定性.本文以河南航空港区某一老旧办公区域的土质高边坡为例,通过对任意形状滑动面的计算假设,设定滑动坡面为自由边界、底部为固定约束边界、四周为自由边界来建立滑坡计算模型,选取两个典型边坡剖面,分析其在自然状态和饱和状态下的最危险滑动面、对应滑动圆心以及相应的最小稳定安全系数.结果表明：边坡在饱和状态下的稳定系数比自然状态下的降低了0.10～0.11,验证了含水量的增加对土质边坡的稳定性影响较大的结论;模拟分析得典型坡面的最大稳定系数为0.84,远小于滑坡允许稳定系数1.2～1.3,说明该边坡处于极不稳定状态,与现场勘查情况相吻合.另外,提出采用混凝土挡墙加喷锚支护提高土体抗滑力,防止雨水对坡体的浸润破坏;或用削坡、人工植草、浆砌石防护坡脚等措施来减轻坡体荷载,保持边坡稳定。
The GEO-Slope / W program can establish a two-dimensional calculation model,which can comprehensively consider many factors of the groundwater,soil cracks,slope top preloading and many conditions of complex soil layer,arbitrary slip surface shape and a variety of pore water pressure,to analyze the slope stability. In this paper,taking an example of a high soil slope in the old office area in Henan airport,through the calculation of any shape of the sliding surface,the set of the sliding slope as the free boundary,the bottom as the fixed constraint boundary,and all around as the free boundary,a landslide calculation model is established. Furthermore,two typical slope sections are selected to analyze the most dangerous sliding surface,the corresponding slide center and the corresponding minimum stability coefficient under the natural state and saturated state. The results show that the safety factor of slope undersaturated state is lower than that of natural state by 0. 10 ～ 0. 11,which indicates that the increase of water content has a great influence on the stability of soil slope,and the maximum stability factor of the typical slope is 0. 840,which is far less than its safety range from 1. 2 to 1. 3,which indicates that the slope is in a very unstable state,coincided with the scene investigation. In addition,a new concrete retaining wall with anchor supporting technology is proposed to improve the soil at the foot of the anti slide force to prevent rain on slope infiltration and destruction; or some other measures,such as cutting slope,artificial grass,masonry slope foot slope and so on,also can reduce the slope load to keep the slope stability.
出处
《华北水利水电大学学报（自然科学版）》
2015年第5期67-70,共4页
Journal of North China University of Water Resources and Electric Power：Natural Science Edition
作者简介
李风增（1981-），男，河南南阳人，工程师，硕士，主要从事道路交通建设及工程边坡稳定方面的研究．
