兰州交通大学学报
蘭州交通大學學報
란주교통대학학보
JOURNAL OF LANZHOU JIAOTONG UNIVERSITY（Natural Sciences）
2014年
1期
19-22
,共4页
临空面%隧道工程%应用与控制
臨空麵%隧道工程%應用與控製
림공면%수도공정%응용여공제
free surface%tunneling engineering%application and control
合理控制临空面可以获得较好的爆破效果，软弱、破碎地质围岩的洞室內缩及坍塌变形一般朝临空面方向发生，且变形幅度与坍塌风险均随临空面的增大而增大。以兰渝铁路 LYS-2标隧道实际施工控制为例，分析了临空面在隧道施工中正反两方面的作用，从控制临空面角度阐述了防止隧道变形的措施。
閤理控製臨空麵可以穫得較好的爆破效果，軟弱、破碎地質圍巖的洞室內縮及坍塌變形一般朝臨空麵方嚮髮生，且變形幅度與坍塌風險均隨臨空麵的增大而增大。以蘭渝鐵路 LYS-2標隧道實際施工控製為例，分析瞭臨空麵在隧道施工中正反兩方麵的作用，從控製臨空麵角度闡述瞭防止隧道變形的措施。
합리공제림공면가이획득교호적폭파효과，연약、파쇄지질위암적동실내축급담탑변형일반조림공면방향발생，차변형폭도여담탑풍험균수림공면적증대이증대。이란투철로 LYS-2표수도실제시공공제위례，분석료림공면재수도시공중정반량방면적작용，종공제림공면각도천술료방지수도변형적조시。
The reasonable control of free surface can get better blasting results.The surrounding rock particularly weak,broken geological rock cave interior deformation and collapse shrinking oc-cur to the free surface direction and amplitude of deformation and the security risk increases with the free surface increases.In this paper,the actual construction control standard of Lan Yu Rail-way LYS-2 tunnel as an example,analyzes the positive and adverse effects of the free face in tun-nel construction and from the perspective of the free surface control measures to prevent the de-formation of the tunnel.
