复杂高地应力区软岩隧道大变形控制技术研究  

Large deformation control for soft rock tunnel under complicated ground stress condition

作　　者：潘飞[1] 程圣国[1] 陈婷[1] 

机构地区：[1]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《人民长江》2014年第1期49-52,76,共5页Yangtze River

摘　　要：以鄂西宜巴高速公路峡口隧道为工程实例,针对隧道施工中遇到的高地应力软岩大变形问题,对其高地应力软岩特点和大变形特征进行分析研究。提出优化开挖方法、调整预留变形量、利用联合初期支护和可伸缩性U型钢架及信息化施工等综合大变形控制措施和施工技术,有效地控制了隧道围岩大变形。通过支护结构受力监测,以及拱顶、水平收敛累计沉降量与沉降速率监测,验证了所采取的大变形控制技术的合理性,对鄂西复杂高地应力软岩隧道大变形控制技术作了有益的探索。The characteristics of high ground stress and large deformation of soft rock in tunnel construction are analyzed ai- ming at Xiakou Tunnel, a highway tunnel of Yichang - Badong Highway in western Hubei Province. The large deformation was controlled effectively by comprehensively adopting the solutions such as optimizing excavation method, adjusting reserved deform- ation, applying initial support and telescopic U steel frame and using informatizational construction measures, which were verified effective and reasonable through stress monitoring for tunnel lining and measurement of accumulative settlement and settlement rate in vertical and transverse directions.

关 键 词：高地应力 大变形 变形控制 施工工法 软岩隧道 

分 类 号：U455[建筑科学—桥梁与隧道工程]