隧道洞口高陡边坡稳定性分析及支护方案研究  

On the Stability and Retaining Structure of the Steep Side Slope at the Tunnel Entrance

作　　者：田士军[1] TIAN Shijun(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《路基工程》2023年第2期184-189,共6页Subgrade Engineering

摘　　要：以某隧道进口高陡边坡为研究对象,采用FLAC3D数值模拟软件,进行边坡稳定性和支护结构受力分析,研究边坡稳定性变化情况及支护方案的合理可行性。研究结果表明:支护结构较大程度地提高了边坡稳定性,坡体安全系数由1.08提高到1.25以上,边坡塑性区范围有所减小;计算所得的支护结构受力情况与实际较为一致,支护结构采用的锚索预应力、锚索锚固段长度、加固桩截面尺寸和桩间距等设计参数合理可行。Taking the steep slope at the tunnel entrance as an research object,the stability of slope and the force of retainning structure are analyzed by the numerical simulation software FLAC3D,and the changes in slope stability and the rationality and feasibility of the retaining scheme is studied.The research results show that the retaining structure significantly improves the side slope stability,with the slope safety coefficient rising from 1.08 to over 1.25;the plastic zone of the slope decreases,the calculated stress of theretaining structure is consistent with the actual situation,and the design parameters such as anchor cable prestress,length of anchor cable,the cross-sectional size of reinforced piles and pile spacing of the supporting structure are reasonable and feasible.

关 键 词：隧道洞口 高陡边坡 稳定性分析 数值模拟 支护工程 合理可行性 

分 类 号：P642.2[天文地球—工程地质学] U212.22[天文地球—地质矿产勘探]