隧道衬砌在外荷载作用下各方向位移的研究

Study on Displacement of Tunnel Lining in Each Direction Under External Load

21世纪以来,我国城市地铁迅速发展。盾构法作为一种隧道施工方法,具有施工速度快、对地面扰动较小、对各种地层适应性强等优点。在地铁施工中越来越受到人们的青睐。本文研究了同一断面盾构隧道顶压(千斤顶压力)、注浆压力和周围土压力对盾构隧道的影响,根据结构力学的基本公式,推导出覆岩水压力、自重、地基阻力、土压力和土压力的计算公式,以及在侧向土压力作用下隧道在各荷载方向上的位移变化,获得水压和其他外部荷载。

Since the 21 st century, China’s urban subway has developed rapidly. As a tunnel construction method,shield method has the advantages of fast construction speed, less ground disturbance and strong adaptability to various strata. It is more and more popular in subway construction. In this paper, the effects of jacking pressure(Jack pressure),grouting pressure and surrounding earth pressure on the shield tunnel are studied. According to the basic formulas of structural mechanics, the calculation formulas of overburden water pressure, self weight, foundation resistance, earth pressure and earth pressure are derived, as well as the displacement changes of the tunnel in each load direction under the action of lateral earth pressure, Obtain water pressure and other external loads.