九岭山深埋特长隧道的工程地质条件  

Geological Engineering Condition in Deep and Long Tunnel Construction at Jiulingshan

作　　者：周龙茂[1] 黄小松[1] 曹细春 张强[3] 朱凤丽[3] 邵明[1] 

机构地区：[1]东华理工大学勘察设计研究院,江西抚州344000 [2]抚州赣东公路设计院,江西抚州344000 [3]天津华北地质勘查总院核工业地质勘查院,天津宝坻301800

出　　处：《桂林工学院学报》2008年第1期54-58,共5页Journal of Guilin University of Technology

摘　　要：九岭山双拱分离式隧道全长5 472.5 m,轴线总体方向N47°W,最大埋深887 m。场地围岩主体以中元古界双桥山群板岩为主,出口段为雪峰晚期花岗闪长岩;地下水主要为基岩裂隙水,弱风化岩石透水率为7.84~6.64 Lu,微风化岩石透水率为0.107~0.106 Lu。围岩BQ值为150~500,初步分级为Ⅴ~Ⅱ级。隧道主体内发育有4条规模较小的构造破碎带,走向近EW向,对隧道的稳定性影响较小,但对隧道涌水将会产生不利影响;地应力以水平应力作用为主,最大水平主应力的优势方向为N52°W^N58°W。隧道所处地段区域稳定性较好,新构造运动不发育,适宜拟建工程项目的建造。Julinshan twin-arch saperated tunnel is 5 472.5 m long, and the tunnel axis is about N47°W. The maximum burial depth is 887 m. The surrounding rocks are the slate Mesoproterozoic Shuangqiaoshan Group, the exit section of tunnel is granodiorite in late Xuefeng Period. The groundwater is fissure water of the bedrock. The permeability of moderate weathering rock ranges from 7.84 to 6.64 Lu, and the weak weathering rock 0. 107 to 0. 106 Lu. The BQ value is from 150 to 500, and the classification of the surrounding rock quality is Ⅴ - Ⅱ. The 4 small structure fracture zones （ nearly East - West strike） in the tunnel affect little the stability, but the inrush water much in the tunnel. The maximum horizontal principal stress direction is from N52°W to N58°W. It is favourable for project construction because of field stability and less neotectonic movement.

关 键 词：地应力 围岩分级 工程地质条件 隧道 九岭山 

分 类 号：U452.12[建筑科学—桥梁与隧道工程]