公路隧道应力释放率对软弱围岩稳定性影响OACHSSCDCSTPCD
Effects of Stress Release Rate on Stability of Soft Surrounding Rock in Highway Tunnels
近年来,由于新奥法广泛地运用于地下工程的施工过程中,围岩与支护结构之间的相互作用以及支护时机受到越来越多的关注.中条山隧道洞口段软弱围岩开挖步序多、工序及应力变化复杂,尤其是核心土解除后和二衬施工前安全风险大.本文采用有限差分软件对该隧道洞口段施工过程进行三维数值模拟,研究了洞周位移及支护结构在不同应力释放率下的力学响应,重点分析了典型断面处洞周围岩及支护结构的位移和受力情况,以及洞周位移随施工过程的动态变化规律.研究结果表明:对于软弱围岩公路隧…查看全部>>
In recent years, NATM is widely used in the construction of underground engineering, the supporting time and the interaction between rock and support structure are increasingly concerned. There are multiple steps in the construction of soft surrounding rock in the portal section of Zhongtiaoshan tunnel, and the construction sequences and the stress variation are complicated. Particularly, high risk exists after removal of core soil and prior to installation …查看全部>>
张娟;余舜;申俊敏;郑俊杰
华中科技大学土木工程与力学学院,湖北武汉430074华中科技大学土木工程与力学学院,湖北武汉430074山西省交通科学研究院黄土地区公路建设与养护技术交通行业重点实验室,山西太原030006
交通工程
公路隧道软弱围岩围岩稳定性应力释放率
highway tunnel soft surrounding rock stability of surrounding rock stress release rate
《土木工程与管理学报》 2012 (1)
35-39,43,6
山西省交通建设科技项目(10-2-13)
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