摘要
随着小净距隧道在工程实际中的应用,小净距隧道合理净距的确定成为工程所要解决的首要问题,应用二维弹塑性有限元方法,针对丹东大荒沟隧道的工程实例,对不同净距下小净距隧道围岩的位移、应力、塑性区进行模拟分析,并应用有限元强度折减法确定出不同净距下隧道的安全系数,最后通过隧道中心岩柱的塑性区是否贯通和安全系数的突变来确定小净距隧道的合理净距。
With application of tunnel with minor clearance in actual engineering, the determination of rational clearance of tunnel with minor clearance becomes already the first issue to need settling in engineering. By two dimensional elasticoplastic finite element method aiming paper simulates and analyzes the displacement, stress clearance under different clearances an nel under different clearances. Lastely, at example of Dandong Dahuanggou Tunnel engineering, the and palstic zone of surrounding rock of tunnel with minor if the plastic zone of central rock of tunnel goes across and the safety coefficient is catastrophic.
出处
《北方交通》
2008年第9期81-83,共3页
Northern Communications
关键词
小净距隧道
有限元模拟
强度折减法
安全系数
Tunnel with minor clearance
Finite element simulation
Strength reduction method
Safety coefficient
