岩质边坡稳定性评价及治理措施分析

Analysis on the Stability Evaluation and Treatment Measure of Rock Slope

文章以广州市南沙区黄阁镇某崩塌灾害为研究对象,通过现场勘查分析了崩塌现状、空间形态、规模与类型、节理裂隙特征,进一步从定性和定量两方面对崩塌边坡稳定性展开分析,针对边坡稳定性状态提出了喷锚+主动防护网联合防治的方案。研究表明,区域地质构造条件复杂,存在东莞断裂和白泥-沙湾断裂;岩质边坡不利结构面对坡体的影响主要为切割坡体,边坡节理裂隙发育,边坡可能往北向、西向及北西向的节理面或节理面的交割线发生崩塌,边坡失稳形态以危岩崩塌为主。

Taking a collapse disaster in Huangge Town,Nansha District,Guangzhou City as the research object,this paper analyzes the current situation,spatial form,scale and type,jointfissure characteristics of the collapse through field investigation,and further analyzes the stability of the collapse slope from both qualitative and quantitative aspects.In view of the stability of the slope,a joint prevention and control scheme of spray anchor+active protection net is proposed.The research shows that the regional geological structure conditions are complex with Dongguan fault and Baini-Shawan fault;the influence of the unfavorable structural plane of the rock slope on the slope is mainly to cut the slope,the joint fissures of the slope are developed,and the slope may collapse to the north,west and northwest joint surface or the intersection line of the joint surface,and the slope instability form is dominated by dangerous rock collapse.