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.
出处
《人民长江》
北大核心
2014年第1期49-52,76,共5页
Yangtze River
关键词
高地应力
大变形
变形控制
施工工法
软岩隧道
high ground stress
large deformation
deformation control
construction method
tunnel with soft rock
