常吉高速公路湘西段路堑边坡结构特征与防护措施

常吉高速公路湘西段地形起伏大, 地质条件复杂, 路堑边坡数量众多, 边坡稳定性问题突出。本文根据岩体产状与边坡坡面的关系研究, 认为常吉高速湘西段路堑边坡主要包括顺向坡、正交坡与反向坡, 其中顺向坡的变形破坏机制与它的物质组成、岩体结构合风化程度等有关。分析、总结了路堑边坡的变形破坏模式, 提出并实施了针对不同边坡结构类型与变形破坏模式的边坡防护措施。

STRUCTURAL CHARACTERISTICS AND PROTECTION MEASURES OF CUT SLOPES ON WESTERN HUNAN SECTION OF THE CHANGDE - JISHOU EXPRESSWAY IN HUNAN PROVINCE

M any cut slopes w ere formed on w estern section of the Changde- Jishou Expressw ay inH unan prov ince, where the topograph ica l and geo log ica l conditions are complex. Stab ility issues of the cut slopes are outstand ing. Based on a deta iled geo log ical survey, this paper presents the structure classificat ion o f the cut slopes accord ing to the relat ionship betw een rock mass occurrence and slope dip direction. The relationsh ip betw een deformation and failure mechan ism and its composit ion, rock structure and w ea thering extent is studied in detai.l The paper fur ther identif ies the deformation and fa iluremodes o f the cut slopes. It suggests the safe tymeasures corresponding to different slope types and failuremodes. The suggestionsw ere ut ilized and achieved exce llent resu lts.